diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2006-04-03 17:56:36 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2006-04-19 04:14:21 +0200 |
| commit | e4ac58afdfac792c0583af30dbd9eae53e24c78b (patch) | |
| tree | 7517bef2c515fc630e4d3d238867b91cde96f558 /arch | |
| parent | d35d473c25d43d7db3e5e18b66d558d2a631cca8 (diff) | |
| download | op-kernel-dev-e4ac58afdfac792c0583af30dbd9eae53e24c78b.zip op-kernel-dev-e4ac58afdfac792c0583af30dbd9eae53e24c78b.tar.gz | |
[MIPS] Rewrite all the assembler interrupt handlers to C.
Saves like 1,600 lines of code, is way easier to debug, compilers
frequently do a better job than the cut and paste type of handlers many
boards had. And finally having all the stuff done in a single place
also means alot of bug potencial for the MT ASE is gone.
The only surviving handler in assembler is the DECstation one; I hope
Maciej will rewrite it.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
100 files changed, 1114 insertions, 3388 deletions
diff --git a/arch/mips/au1000/common/Makefile b/arch/mips/au1000/common/Makefile index a1edfd1..bf682f5 100644 --- a/arch/mips/au1000/common/Makefile +++ b/arch/mips/au1000/common/Makefile @@ -6,7 +6,7 @@ # Makefile for the Alchemy Au1000 CPU, generic files. # -obj-y += prom.o int-handler.o irq.o puts.o time.o reset.o \ +obj-y += prom.o irq.o puts.o time.o reset.o \ au1xxx_irqmap.o clocks.o platform.o power.o setup.o \ sleeper.o cputable.o dma.o dbdma.o gpio.o diff --git a/arch/mips/au1000/common/int-handler.S b/arch/mips/au1000/common/int-handler.S deleted file mode 100644 index 65baa8a..0000000 --- a/arch/mips/au1000/common/int-handler.S +++ /dev/null @@ -1,69 +0,0 @@ -/* - * Copyright 2001 MontaVista Software Inc. - * Author: ppopov@mvista.com - * - * Interrupt dispatcher for Au1000 boards. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - - .text - .set macro - .set noat - .align 5 - -NESTED(au1000_IRQ, PT_SIZE, sp) - SAVE_ALL - CLI # Important: mark KERNEL mode ! - - mfc0 t0,CP0_CAUSE # get pending interrupts - mfc0 t1,CP0_STATUS # get enabled interrupts - and t0,t1 # isolate allowed ones - - andi t0,0xff00 # isolate pending bits - beqz t0, 3f # spurious interrupt - - andi a0, t0, CAUSEF_IP7 - beq a0, zero, 1f - move a0, sp - jal mips_timer_interrupt - j ret_from_irq - -1: - andi a0, t0, CAUSEF_IP2 # Interrupt Controller 0, Request 0 - beq a0, zero, 2f - move a0,sp - jal intc0_req0_irqdispatch - j ret_from_irq -2: - andi a0, t0, CAUSEF_IP3 # Interrupt Controller 0, Request 1 - beq a0, zero, 3f - move a0,sp - jal intc0_req1_irqdispatch - j ret_from_irq -3: - andi a0, t0, CAUSEF_IP4 # Interrupt Controller 1, Request 0 - beq a0, zero, 4f - move a0,sp - jal intc1_req0_irqdispatch - j ret_from_irq -4: - andi a0, t0, CAUSEF_IP5 # Interrupt Controller 1, Request 1 - beq a0, zero, 5f - move a0, sp - jal intc1_req1_irqdispatch - j ret_from_irq - -5: - move a0, sp - jal spurious_interrupt - j ret_from_irq -END(au1000_IRQ) diff --git a/arch/mips/au1000/common/irq.c b/arch/mips/au1000/common/irq.c index 1339a09..da61de7 100644 --- a/arch/mips/au1000/common/irq.c +++ b/arch/mips/au1000/common/irq.c @@ -66,7 +66,6 @@ #define EXT_INTC1_REQ1 5 /* IP 5 */ #define MIPS_TIMER_IP 7 /* IP 7 */ -extern asmlinkage void au1000_IRQ(void); extern void set_debug_traps(void); extern irq_cpustat_t irq_stat [NR_CPUS]; @@ -446,7 +445,6 @@ void __init arch_init_irq(void) extern int au1xxx_ic0_nr_irqs; cp0_status = read_c0_status(); - set_except_vector(0, au1000_IRQ); /* Initialize interrupt controllers to a safe state. */ @@ -661,3 +659,21 @@ restore_au1xxx_intctl(void) au_writel(sleep_intctl_mask[0], IC0_MASKSET); au_sync(); } #endif /* CONFIG_PM */ + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM; + + if (pending & CAUSEF_IP7) + mips_timer_interrupt(regs); + else if (pending & CAUSEF_IP2) + intc0_req0_irqdispatch(regs); + else if (pending & CAUSEF_IP3) + intc0_req1_irqdispatch(regs); + else if (pending & CAUSEF_IP4) + intc1_req0_irqdispatch(regs); + else if (pending & CAUSEF_IP5) + intc1_req1_irqdispatch(regs); + else + spurious_interrupt(regs); +} diff --git a/arch/mips/cobalt/Makefile b/arch/mips/cobalt/Makefile index 720e757..225ac8f 100644 --- a/arch/mips/cobalt/Makefile +++ b/arch/mips/cobalt/Makefile @@ -2,7 +2,7 @@ # Makefile for the Cobalt micro systems family specific parts of the kernel # -obj-y := irq.o int-handler.o reset.o setup.o +obj-y := irq.o reset.o setup.o obj-$(CONFIG_EARLY_PRINTK) += console.o diff --git a/arch/mips/cobalt/int-handler.S b/arch/mips/cobalt/int-handler.S deleted file mode 100644 index e75d5e3..0000000 --- a/arch/mips/cobalt/int-handler.S +++ /dev/null @@ -1,25 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 1995, 1996, 1997, 2003 by Ralf Baechle - * Copyright (C) 2001, 2002, 2003 by Liam Davies (ldavies@agile.tv) - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/mach-cobalt/cobalt.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - - .text - .align 5 - NESTED(cobalt_handle_int, PT_SIZE, sp) - SAVE_ALL - CLI - - PTR_LA ra, ret_from_irq - move a0, sp - j cobalt_irq - - END(cobalt_handle_int) diff --git a/arch/mips/cobalt/irq.c b/arch/mips/cobalt/irq.c index f9a1088..0b75f4f 100644 --- a/arch/mips/cobalt/irq.c +++ b/arch/mips/cobalt/irq.c @@ -20,8 +20,6 @@ #include <asm/mach-cobalt/cobalt.h> -extern void cobalt_handle_int(void); - /* * We have two types of interrupts that we handle, ones that come in through * the CPU interrupt lines, and ones that come in on the via chip. The CPU @@ -79,7 +77,7 @@ static inline void via_pic_irq(struct pt_regs *regs) do_IRQ(irq, regs); } -asmlinkage void cobalt_irq(struct pt_regs *regs) +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) { unsigned pending; @@ -122,8 +120,6 @@ void __init arch_init_irq(void) */ GALILEO_OUTL(0, GT_INTRMASK_OFS); - set_except_vector(0, cobalt_handle_int); - init_i8259_irqs(); /* 0 ... 15 */ mips_cpu_irq_init(COBALT_CPU_IRQ); /* 16 ... 23 */ diff --git a/arch/mips/ddb5xxx/ddb5074/Makefile b/arch/mips/ddb5xxx/ddb5074/Makefile index 488206b..304c021 100644 --- a/arch/mips/ddb5xxx/ddb5074/Makefile +++ b/arch/mips/ddb5xxx/ddb5074/Makefile @@ -3,6 +3,6 @@ # under Linux. # -obj-y += setup.o irq.o int-handler.o nile4_pic.o +obj-y += setup.o irq.o nile4_pic.o EXTRA_AFLAGS := $(CFLAGS) diff --git a/arch/mips/ddb5xxx/ddb5074/int-handler.S b/arch/mips/ddb5xxx/ddb5074/int-handler.S deleted file mode 100644 index a786441..0000000 --- a/arch/mips/ddb5xxx/ddb5074/int-handler.S +++ /dev/null @@ -1,120 +0,0 @@ -/* - * arch/mips/ddb5074/int-handler.S -- NEC DDB Vrc-5074 interrupt handler - * - * Based on arch/mips/sgi/kernel/indyIRQ.S - * - * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com) - * - * Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com> - * Sony Software Development Center Europe (SDCE), Brussels - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - -/* A lot of complication here is taken away because: - * - * 1) We handle one interrupt and return, sitting in a loop and moving across - * all the pending IRQ bits in the cause register is _NOT_ the answer, the - * common case is one pending IRQ so optimize in that direction. - * - * 2) We need not check against bits in the status register IRQ mask, that - * would make this routine slow as hell. - * - * 3) Linux only thinks in terms of all IRQs on or all IRQs off, nothing in - * between like BSD spl() brain-damage. - * - * Furthermore, the IRQs on the INDY look basically (barring software IRQs - * which we don't use at all) like: - * - * MIPS IRQ Source - * -------- ------ - * 0 Software (ignored) - * 1 Software (ignored) - * 2 Local IRQ level zero - * 3 Local IRQ level one - * 4 8254 Timer zero - * 5 8254 Timer one - * 6 Bus Error - * 7 R4k timer (what we use) - * - * We handle the IRQ according to _our_ priority which is: - * - * Highest ---- R4k Timer - * Local IRQ zero - * Local IRQ one - * Bus Error - * 8254 Timer zero - * Lowest ---- 8254 Timer one - * - * then we just return, if multiple IRQs are pending then we will just take - * another exception, big deal. - */ - - .text - .set noreorder - .set noat - .align 5 - NESTED(ddbIRQ, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - mfc0 s0, CP0_CAUSE # get irq mask - -#if 1 - mfc0 t2,CP0_STATUS # get enabled interrupts - and s0,t2 # isolate allowed ones -#endif - /* First we check for r4k counter/timer IRQ. */ - andi a0, s0, CAUSEF_IP2 # delay slot, check local level zero - beq a0, zero, 1f - andi a0, s0, CAUSEF_IP3 # delay slot, check local level one - - /* Wheee, local level zero interrupt. */ - jal ddb_local0_irqdispatch - move a0, sp # delay slot - - j ret_from_irq - nop # delay slot - -1: - beq a0, zero, 1f - andi a0, s0, CAUSEF_IP6 # delay slot, check bus error - - /* Wheee, local level one interrupt. */ - move a0, sp - jal ddb_local1_irqdispatch - nop - - j ret_from_irq - nop - -1: - beq a0, zero, 1f - nop - - /* Wheee, an asynchronous bus error... */ - move a0, sp - jal ddb_buserror_irq - nop - - j ret_from_irq - nop - -1: - /* Here by mistake? This is possible, what can happen - * is that by the time we take the exception the IRQ - * pin goes low, so just leave if this is the case. - */ - andi a0, s0, (CAUSEF_IP4 | CAUSEF_IP5) - beq a0, zero, 1f - - /* Must be one of the 8254 timers... */ - move a0, sp - jal ddb_8254timer_irq - nop -1: - j ret_from_irq - nop - END(ddbIRQ) diff --git a/arch/mips/ddb5xxx/ddb5074/irq.c b/arch/mips/ddb5xxx/ddb5074/irq.c index 45088a1..60c087b 100644 --- a/arch/mips/ddb5xxx/ddb5074/irq.c +++ b/arch/mips/ddb5xxx/ddb5074/irq.c @@ -21,8 +21,6 @@ #include <asm/ddb5xxx/ddb5074.h> -extern asmlinkage void ddbIRQ(void); - static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL }; #define M1543_PNP_CONFIG 0x03f0 /* PnP Config Port */ @@ -90,7 +88,7 @@ static void m1543_irq_setup(void) } -void ddb_local0_irqdispatch(struct pt_regs *regs) +static void ddb_local0_irqdispatch(struct pt_regs *regs) { u32 mask; int nile4_irq; @@ -118,29 +116,41 @@ void ddb_local0_irqdispatch(struct pt_regs *regs) } } -void ddb_local1_irqdispatch(void) +static void ddb_local1_irqdispatch(void) { printk("ddb_local1_irqdispatch called\n"); } -void ddb_buserror_irq(void) +static void ddb_buserror_irq(void) { printk("ddb_buserror_irq called\n"); } -void ddb_8254timer_irq(void) +static void ddb_8254timer_irq(void) { printk("ddb_8254timer_irq called\n"); } +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status(); + + if (pending & CAUSEF_IP2) + ddb_local0_irqdispatch(regs); + else if (pending & CAUSEF_IP3) + ddb_local1_irqdispatch(); + else if (pending & CAUSEF_IP6) + ddb_buserror_irq(); + else if (pending & (CAUSEF_IP4 | CAUSEF_IP5)) + ddb_8254timer_irq(); +} + void __init arch_init_irq(void) { /* setup cascade interrupts */ setup_irq(NILE4_IRQ_BASE + NILE4_INT_INTE, &irq_cascade); setup_irq(CPU_IRQ_BASE + CPU_NILE4_CASCADE, &irq_cascade); - set_except_vector(0, ddbIRQ); - nile4_irq_setup(NILE4_IRQ_BASE); m1543_irq_setup(); init_i8259_irqs(); diff --git a/arch/mips/ddb5xxx/ddb5476/Makefile b/arch/mips/ddb5xxx/ddb5476/Makefile index 61eec36..ab0312c 100644 --- a/arch/mips/ddb5xxx/ddb5476/Makefile +++ b/arch/mips/ddb5xxx/ddb5476/Makefile @@ -3,7 +3,7 @@ # under Linux. # -obj-y += setup.o irq.o int-handler.o nile4_pic.o vrc5476_irq.o +obj-y += setup.o irq.o nile4_pic.o vrc5476_irq.o obj-$(CONFIG_KGDB) += dbg_io.o EXTRA_AFLAGS := $(CFLAGS) diff --git a/arch/mips/ddb5xxx/ddb5476/int-handler.S b/arch/mips/ddb5xxx/ddb5476/int-handler.S deleted file mode 100644 index 0c2bdae..0000000 --- a/arch/mips/ddb5xxx/ddb5476/int-handler.S +++ /dev/null @@ -1,113 +0,0 @@ -/* - * Copyright 2001 MontaVista Software Inc. - * Author: jsun@mvista.com or jsun@junsun.net - * - * First-level interrupt dispatcher for ddb5476 - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - -#include <asm/ddb5xxx/ddb5476.h> - -/* - * first level interrupt dispatcher for ocelot board - - * We check for the timer first, then check PCI ints A and D. - * Then check for serial IRQ and fall through. - */ - .align 5 - NESTED(ddb5476_handle_int, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - .set noreorder - mfc0 t0, CP0_CAUSE - mfc0 t2, CP0_STATUS - - and t0, t2 - - andi t1, t0, STATUSF_IP7 /* cpu timer */ - bnez t1, ll_cpu_ip7 - andi t1, t0, STATUSF_IP2 /* vrc5476 & i8259 */ - bnez t1, ll_cpu_ip2 - andi t1, t0, STATUSF_IP3 - bnez t1, ll_cpu_ip3 - andi t1, t0, STATUSF_IP4 - bnez t1, ll_cpu_ip4 - andi t1, t0, STATUSF_IP5 - bnez t1, ll_cpu_ip5 - andi t1, t0, STATUSF_IP6 - bnez t1, ll_cpu_ip6 - andi t1, t0, STATUSF_IP0 /* software int 0 */ - bnez t1, ll_cpu_ip0 - andi t1, t0, STATUSF_IP1 /* software int 1 */ - bnez t1, ll_cpu_ip1 - nop - - .set reorder - - /* wrong alarm or masked ... */ - // jal spurious_interrupt - // j ret_from_irq - move a0, sp - jal vrc5476_irq_dispatch - j ret_from_irq - nop - - .align 5 - -ll_cpu_ip0: - li a0, CPU_IRQ_BASE + 0 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpu_ip1: - li a0, CPU_IRQ_BASE + 1 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpu_ip2: /* jump to second-level dispatching */ - move a0, sp - jal vrc5476_irq_dispatch - j ret_from_irq - -ll_cpu_ip3: - li a0, CPU_IRQ_BASE + 3 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpu_ip4: - li a0, CPU_IRQ_BASE + 4 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpu_ip5: - li a0, CPU_IRQ_BASE + 5 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpu_ip6: - li a0, CPU_IRQ_BASE + 6 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpu_ip7: - li a0, CPU_IRQ_BASE + 7 - move a1, sp - jal do_IRQ - j ret_from_irq - - END(ddb5476_handle_int) diff --git a/arch/mips/ddb5xxx/ddb5476/irq.c b/arch/mips/ddb5xxx/ddb5476/irq.c index 5388b58..7583a1f 100644 --- a/arch/mips/ddb5xxx/ddb5476/irq.c +++ b/arch/mips/ddb5xxx/ddb5476/irq.c @@ -110,11 +110,36 @@ static void nile4_irq_setup(void) static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL }; static struct irqaction irq_error = { no_action, 0, CPU_MASK_NONE, "error", NULL, NULL }; -extern asmlinkage void ddb5476_handle_int(void); extern int setup_irq(unsigned int irq, struct irqaction *irqaction); extern void mips_cpu_irq_init(u32 irq_base); extern void vrc5476_irq_init(u32 irq_base); +extern void vrc5476_irq_dispatch(struct pt_regs *regs); + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status(); + + if (pending & STATUSF_IP7) + do_IRQ(CPU_IRQ_BASE + 7, regs); + else if (pending & STATUSF_IP2) + vrc5476_irq_dispatch(regs); + else if (pending & STATUSF_IP3) + do_IRQ(CPU_IRQ_BASE + 3, regs); + else if (pending & STATUSF_IP4) + do_IRQ(CPU_IRQ_BASE + 4, regs); + else if (pending & STATUSF_IP5) + do_IRQ(CPU_IRQ_BASE + 5, regs); + else if (pending & STATUSF_IP6) + do_IRQ(CPU_IRQ_BASE + 6, regs); + else if (pending & STATUSF_IP0) + do_IRQ(CPU_IRQ_BASE, regs); + else if (pending & STATUSF_IP1) + do_IRQ(CPU_IRQ_BASE + 1, regs); + + vrc5476_irq_dispatch(regs); +} + void __init arch_init_irq(void) { /* hardware initialization */ @@ -137,7 +162,4 @@ void __init arch_init_irq(void) setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_LBRT, &irq_error); setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_PCIS, &irq_error); setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_PCI, &irq_error); - - /* setup the grandpa intr vector */ - set_except_vector(0, ddb5476_handle_int); } diff --git a/arch/mips/ddb5xxx/ddb5476/vrc5476_irq.c b/arch/mips/ddb5xxx/ddb5476/vrc5476_irq.c index 581eaba..a3c5e7b 100644 --- a/arch/mips/ddb5xxx/ddb5476/vrc5476_irq.c +++ b/arch/mips/ddb5xxx/ddb5476/vrc5476_irq.c @@ -77,7 +77,7 @@ vrc5476_irq_init(u32 base) } -asmlinkage void +void vrc5476_irq_dispatch(struct pt_regs *regs) { u32 mask; diff --git a/arch/mips/ddb5xxx/ddb5477/Makefile b/arch/mips/ddb5xxx/ddb5477/Makefile index b79b43c..ea68815 100644 --- a/arch/mips/ddb5xxx/ddb5477/Makefile +++ b/arch/mips/ddb5xxx/ddb5477/Makefile @@ -2,7 +2,7 @@ # Makefile for NEC DDB-Vrc5477 board # -obj-y += int-handler.o irq.o irq_5477.o setup.o lcd44780.o +obj-y += irq.o irq_5477.o setup.o lcd44780.o obj-$(CONFIG_RUNTIME_DEBUG) += debug.o obj-$(CONFIG_KGDB) += kgdb_io.o diff --git a/arch/mips/ddb5xxx/ddb5477/int-handler.S b/arch/mips/ddb5xxx/ddb5477/int-handler.S deleted file mode 100644 index 9884874..0000000 --- a/arch/mips/ddb5xxx/ddb5477/int-handler.S +++ /dev/null @@ -1,75 +0,0 @@ -/* - * Copyright 2001 MontaVista Software Inc. - * Author: jsun@mvista.com or jsun@junsun.net - * - * First-level interrupt dispatcher for ddb5477 - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> -#include <asm/ddb5xxx/ddb5477.h> - -/* - * first level interrupt dispatcher for ocelot board - - * We check for the timer first, then check PCI ints A and D. - * Then check for serial IRQ and fall through. - */ - .align 5 - NESTED(ddb5477_handle_int, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - .set noreorder - mfc0 t0, CP0_CAUSE - mfc0 t2, CP0_STATUS - - and t0, t2 - - andi t1, t0, STATUSF_IP7 /* cpu timer */ - bnez t1, ll_cputimer_irq - andi t1, t0, (STATUSF_IP2 | STATUSF_IP3 | STATUSF_IP4 | STATUSF_IP5 | STATUSF_IP6 ) - bnez t1, ll_vrc5477_irq - andi t1, t0, STATUSF_IP0 /* software int 0 */ - bnez t1, ll_cpu_ip0 - andi t1, t0, STATUSF_IP1 /* software int 1 */ - bnez t1, ll_cpu_ip1 - nop - .set reorder - - /* wrong alarm or masked ... */ - jal spurious_interrupt - j ret_from_irq - END(ddb5477_handle_int) - - .align 5 - -ll_vrc5477_irq: - move a0, sp - jal vrc5477_irq_dispatch - j ret_from_irq - -ll_cputimer_irq: - li a0, CPU_IRQ_BASE + 7 - move a1, sp - jal do_IRQ - j ret_from_irq - - -ll_cpu_ip0: - li a0, CPU_IRQ_BASE + 0 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpu_ip1: - li a0, CPU_IRQ_BASE + 1 - move a1, sp - jal do_IRQ - j ret_from_irq diff --git a/arch/mips/ddb5xxx/ddb5477/irq.c b/arch/mips/ddb5xxx/ddb5477/irq.c index 9ffe1a91..de433cf9 100644 --- a/arch/mips/ddb5xxx/ddb5477/irq.c +++ b/arch/mips/ddb5xxx/ddb5477/irq.c @@ -75,7 +75,6 @@ set_pci_int_attr(u32 pci, u32 intn, u32 active, u32 trigger) extern void vrc5477_irq_init(u32 base); extern void mips_cpu_irq_init(u32 base); -extern asmlinkage void ddb5477_handle_int(void); extern int setup_irq(unsigned int irq, struct irqaction *irqaction); static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL }; @@ -135,9 +134,6 @@ void __init arch_init_irq(void) /* setup cascade interrupts */ setup_irq(VRC5477_IRQ_BASE + VRC5477_I8259_CASCADE, &irq_cascade); setup_irq(CPU_IRQ_BASE + CPU_VRC5477_CASCADE, &irq_cascade); - - /* hook up the first-level interrupt handler */ - set_except_vector(0, ddb5477_handle_int); } u8 i8259_interrupt_ack(void) @@ -159,7 +155,7 @@ u8 i8259_interrupt_ack(void) * the first level int-handler will jump here if it is a vrc5477 irq */ #define NUM_5477_IRQS 32 -asmlinkage void +static void vrc5477_irq_dispatch(struct pt_regs *regs) { u32 intStatus; @@ -197,3 +193,21 @@ vrc5477_irq_dispatch(struct pt_regs *regs) } } } + +#define VR5477INTS (STATUSF_IP2|STATUSF_IP3|STATUSF_IP4|STATUSF_IP5|STATUSF_IP6) + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status(); + + if (pending & STATUSF_IP7) + do_IRQ(CPU_IRQ_BASE + 7, regs); + else if (pending & VR5477INTS) + vrc5477_irq_dispatch(regs); + else if (pending & STATUSF_IP0) + do_IRQ(CPU_IRQ_BASE, regs); + else if (pending & STATUSF_IP1) + do_IRQ(CPU_IRQ_BASE + 1, regs); + else + spurious_interrupt(regs); +} diff --git a/arch/mips/dec/int-handler.S b/arch/mips/dec/int-handler.S index 5bafd58..e8ec93e 100644 --- a/arch/mips/dec/int-handler.S +++ b/arch/mips/dec/int-handler.S @@ -36,7 +36,7 @@ .text .set noreorder /* - * decstation_handle_int: Interrupt handler for DECstations + * plat_irq_dispatch: Interrupt handler for DECstations * * We follow the model in the Indy interrupt code by David Miller, where he * says: a lot of complication here is taken away because: @@ -125,11 +125,7 @@ * just take another exception, big deal. */ .align 5 - NESTED(decstation_handle_int, PT_SIZE, ra) - .set noat - SAVE_ALL - CLI # TEST: interrupts should be off - .set at + NESTED(plat_irq_dispatch, PT_SIZE, ra) .set noreorder /* @@ -286,7 +282,7 @@ spurious: nop j ret_from_irq nop - END(decstation_handle_int) + END(plat_irq_dispatch) /* * Generic unimplemented interrupt routines -- cpu_mask_nr_tbl diff --git a/arch/mips/dec/setup.c b/arch/mips/dec/setup.c index 7c1ca8f..ad5d436 100644 --- a/arch/mips/dec/setup.c +++ b/arch/mips/dec/setup.c @@ -48,8 +48,6 @@ extern void dec_machine_halt(void); extern void dec_machine_power_off(void); extern irqreturn_t dec_intr_halt(int irq, void *dev_id, struct pt_regs *regs); -extern asmlinkage void decstation_handle_int(void); - unsigned long dec_kn_slot_base, dec_kn_slot_size; EXPORT_SYMBOL(dec_kn_slot_base); @@ -744,7 +742,6 @@ void __init arch_init_irq(void) panic("Don't know how to set this up!"); break; } - set_except_vector(0, decstation_handle_int); /* Free the FPU interrupt if the exception is present. */ if (!cpu_has_nofpuex) { diff --git a/arch/mips/galileo-boards/ev96100/Makefile b/arch/mips/galileo-boards/ev96100/Makefile index 58c02f9..cd868ec 100644 --- a/arch/mips/galileo-boards/ev96100/Makefile +++ b/arch/mips/galileo-boards/ev96100/Makefile @@ -6,4 +6,4 @@ # Makefile for the Galileo EV96100 board. # -obj-y += init.o irq.o puts.o reset.o time.o int-handler.o setup.o +obj-y += init.o irq.o puts.o reset.o time.o setup.o diff --git a/arch/mips/galileo-boards/ev96100/int-handler.S b/arch/mips/galileo-boards/ev96100/int-handler.S deleted file mode 100644 index 0edf1fe..0000000 --- a/arch/mips/galileo-boards/ev96100/int-handler.S +++ /dev/null @@ -1,34 +0,0 @@ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - - .set noat - .align 5 - -NESTED(ev96100IRQ, PT_SIZE, sp) - SAVE_ALL - CLI # Important: mark KERNEL mode ! - - mfc0 t0, CP0_CAUSE # get pending interrupts - mfc0 t1, CP0_STATUS # get enabled interrupts - and t0, t1 # isolate allowed ones - - # FIX ME add R7000 extensions - andi t0,0xff00 # isolate pending bits - andi a0, t0, CAUSEF_IP7 - beq a0, zero, 1f - move a0, sp - jal mips_timer_interrupt - j ret_from_irq - -1: beqz t0, 3f # spurious interrupt - - move a0, t0 - move a1, sp - jal ev96100_cpu_irq - j ret_from_irq - -3: jal spurious_interrupt - j ret_from_irq - END(ev96100IRQ) diff --git a/arch/mips/galileo-boards/ev96100/irq.c b/arch/mips/galileo-boards/ev96100/irq.c index 383801d..ee5d672 100644 --- a/arch/mips/galileo-boards/ev96100/irq.c +++ b/arch/mips/galileo-boards/ev96100/irq.c @@ -40,8 +40,6 @@ #include <linux/interrupt.h> #include <asm/irq_cpu.h> -extern asmlinkage void ev96100IRQ(void); - static inline unsigned int ffz8(unsigned int word) { unsigned long k; @@ -54,13 +52,26 @@ static inline unsigned int ffz8(unsigned int word) return k; } +extern void mips_timer_interrupt(struct pt_regs *regs); + asmlinkage void ev96100_cpu_irq(unsigned int pending, struct pt_regs *regs) { do_IRQ(ffz8(pending >> 8), regs); } +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; + + if (pending & CAUSEF_IP7) + mips_timer_interrupt(regs); + else if (pending) + ev96100_cpu_irq(pending, regs); + else + spurious_interrupt(regs); +} + void __init arch_init_irq(void) { - set_except_vector(0, ev96100IRQ); mips_cpu_irq_init(0); } diff --git a/arch/mips/gt64120/ev64120/Makefile b/arch/mips/gt64120/ev64120/Makefile index ebe91c5..b2c53a8 100644 --- a/arch/mips/gt64120/ev64120/Makefile +++ b/arch/mips/gt64120/ev64120/Makefile @@ -6,6 +6,6 @@ # Makefile for the Galileo EV64120 board. # -obj-y += int-handler.o irq.o promcon.o reset.o serialGT.o setup.o +obj-y += irq.o promcon.o reset.o serialGT.o setup.o EXTRA_AFLAGS := $(CFLAGS) diff --git a/arch/mips/gt64120/ev64120/int-handler.S b/arch/mips/gt64120/ev64120/int-handler.S deleted file mode 100644 index 9dda5b4..0000000 --- a/arch/mips/gt64120/ev64120/int-handler.S +++ /dev/null @@ -1,114 +0,0 @@ -/* - * int-handler.S - * - * Based on the cobalt handler. - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - -/* - * galileo_handle_int - - * We check for the timer first, then check PCI ints A and D. - * Then check for serial IRQ and fall through. - */ - .align 5 - .set reorder - .set noat - NESTED(galileo_handle_int, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - mfc0 t0,CP0_CAUSE - mfc0 t2,CP0_STATUS - - and t0,t2 - - andi t1,t0,STATUSF_IP4 /* int2 hardware line (timer) */ - bnez t1,ll_gt64120_irq - andi t1,t0,STATUSF_IP2 /* int0 hardware line */ - bnez t1,ll_pci_intA - andi t1,t0,STATUSF_IP5 /* int3 hardware line */ - bnez t1,ll_pci_intD - andi t1,t0,STATUSF_IP6 /* int4 hardware line */ - bnez t1,ll_serial_irq - andi t1,t0,STATUSF_IP7 /* compare int */ - bnez t1,ll_compare_irq - nop - - /* wrong alarm or masked ... */ - jal spurious_interrupt - nop - j ret_from_irq - END(galileo_handle_int) - - - .align 5 - .set reorder -ll_gt64120_irq: - li a0,4 - move a1,sp - jal do_IRQ - nop - j ret_from_irq - nop - - .align 5 - .set reorder -ll_compare_irq: - li a0,7 - move a1,sp - jal do_IRQ - nop - j ret_from_irq - nop - - .align 5 - .set reorder -ll_pci_intA: - move a0,sp - jal pci_intA - nop - j ret_from_irq - nop - -#if 0 - .align 5 - .set reorder -ll_pci_intB: - move a0,sp - jal pci_intB - nop - j ret_from_irq - nop - - .align 5 - .set reorder -ll_pci_intC: - move a0,sp - jal pci_intC - nop - j ret_from_irq - nop -#endif - - .align 5 - .set reorder -ll_pci_intD: - move a0,sp - jal pci_intD - nop - j ret_from_irq - nop - - .align 5 - .set reorder -ll_serial_irq: - li a0,6 - move a1,sp - jal do_IRQ - nop - j ret_from_irq - nop diff --git a/arch/mips/gt64120/ev64120/irq.c b/arch/mips/gt64120/ev64120/irq.c index 3b18615..46c468b 100644 --- a/arch/mips/gt64120/ev64120/irq.c +++ b/arch/mips/gt64120/ev64120/irq.c @@ -46,14 +46,22 @@ #include <asm/system.h> #include <asm/gt64120.h> -asmlinkage inline void pci_intA(struct pt_regs *regs) +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) { - do_IRQ(GT_INTA, regs); -} - -asmlinkage inline void pci_intD(struct pt_regs *regs) -{ - do_IRQ(GT_INTD, regs); + unsigned int pending = read_c0_status() & read_c0_cause(); + + if (pending & STATUSF_IP4) /* int2 hardware line (timer) */ + do_IRQ(4, regs); + else if (pending & STATUSF_IP2) /* int0 hardware line */ + do_IRQ(GT_INTA, regs); + else if (pending & STATUSF_IP5) /* int3 hardware line */ + do_IRQ(GT_INTD, regs); + else if (pending & STATUSF_IP6) /* int4 hardware line */ + do_IRQ(6, regs); + else if (pending & STATUSF_IP7) /* compare int */ + do_IRQ(7, regs); + else + spurious_interrupt(regs); } static void disable_ev64120_irq(unsigned int irq_nr) @@ -109,16 +117,11 @@ static struct hw_interrupt_type ev64120_irq_type = { void gt64120_irq_setup(void) { - extern asmlinkage void galileo_handle_int(void); - /* * Clear all of the interrupts while we change the able around a bit. */ clear_c0_status(ST0_IM); - /* Sets the exception_handler array. */ - set_except_vector(0, galileo_handle_int); - local_irq_disable(); /* diff --git a/arch/mips/gt64120/momenco_ocelot/Makefile b/arch/mips/gt64120/momenco_ocelot/Makefile index 7b59c65..6f708df 100644 --- a/arch/mips/gt64120/momenco_ocelot/Makefile +++ b/arch/mips/gt64120/momenco_ocelot/Makefile @@ -2,7 +2,7 @@ # Makefile for Momentum's Ocelot board. # -obj-y += int-handler.o irq.o prom.o reset.o setup.o +obj-y += irq.o prom.o reset.o setup.o obj-$(CONFIG_KGDB) += dbg_io.o diff --git a/arch/mips/gt64120/momenco_ocelot/int-handler.S b/arch/mips/gt64120/momenco_ocelot/int-handler.S deleted file mode 100644 index 808acef..0000000 --- a/arch/mips/gt64120/momenco_ocelot/int-handler.S +++ /dev/null @@ -1,131 +0,0 @@ -/* - * Copyright 2001 MontaVista Software Inc. - * Author: jsun@mvista.com or jsun@junsun.net - * - * First-level interrupt dispatcher for ocelot board. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - -/* - * first level interrupt dispatcher for ocelot board - - * We check for the timer first, then check PCI ints A and D. - * Then check for serial IRQ and fall through. - */ - .align 5 - NESTED(ocelot_handle_int, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - mfc0 t0, CP0_CAUSE - mfc0 t2, CP0_STATUS - - and t0, t2 - - andi t1, t0, STATUSF_IP2 /* int0 hardware line */ - bnez t1, ll_pri_enet_irq - andi t1, t0, STATUSF_IP3 /* int1 hardware line */ - bnez t1, ll_sec_enet_irq - andi t1, t0, STATUSF_IP4 /* int2 hardware line */ - bnez t1, ll_uart1_irq - andi t1, t0, STATUSF_IP5 /* int3 hardware line */ - bnez t1, ll_cpci_irq - andi t1, t0, STATUSF_IP6 /* int4 hardware line */ - bnez t1, ll_galileo_irq - andi t1, t0, STATUSF_IP7 /* cpu timer */ - bnez t1, ll_cputimer_irq - - /* now look at the extended interrupts */ - mfc0 t0, CP0_CAUSE - cfc0 t1, CP0_S1_INTCONTROL - - /* shift the mask 8 bits left to line up the bits */ - sll t2, t1, 8 - - and t0, t2 - srl t0, t0, 16 - - andi t1, t0, STATUSF_IP8 /* int6 hardware line */ - bnez t1, ll_pmc1_irq - andi t1, t0, STATUSF_IP9 /* int7 hardware line */ - bnez t1, ll_pmc2_irq - andi t1, t0, STATUSF_IP10 /* int8 hardware line */ - bnez t1, ll_cpci_abcd_irq - andi t1, t0, STATUSF_IP11 /* int9 hardware line */ - bnez t1, ll_uart2_irq - - .set reorder - - /* wrong alarm or masked ... */ - j spurious_interrupt - nop - END(ocelot_handle_int) - - .align 5 -ll_pri_enet_irq: - li a0, 2 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_sec_enet_irq: - li a0, 3 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_uart1_irq: - li a0, 4 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpci_irq: - li a0, 5 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_galileo_irq: - li a0, 6 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cputimer_irq: - li a0, 7 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_pmc1_irq: - li a0, 8 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_pmc2_irq: - li a0, 9 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpci_abcd_irq: - li a0, 10 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_uart2_irq: - li a0, 11 - move a1, sp - jal do_IRQ - j ret_from_irq diff --git a/arch/mips/gt64120/momenco_ocelot/irq.c b/arch/mips/gt64120/momenco_ocelot/irq.c index 4f108da..885f67f 100644 --- a/arch/mips/gt64120/momenco_ocelot/irq.c +++ b/arch/mips/gt64120/momenco_ocelot/irq.c @@ -48,7 +48,38 @@ #include <asm/mipsregs.h> #include <asm/system.h> -extern asmlinkage void ocelot_handle_int(void); +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_status() & read_c0_cause(); + + if (pending & STATUSF_IP2) /* int0 hardware line */ + do_IRQ(2, regs); + else if (pending & STATUSF_IP3) /* int1 hardware line */ + do_IRQ(3, regs); + else if (pending & STATUSF_IP4) /* int2 hardware line */ + do_IRQ(4, regs); + else if (pending & STATUSF_IP5) /* int3 hardware line */ + do_IRQ(5, regs); + else if (pending & STATUSF_IP6) /* int4 hardware line */ + do_IRQ(6, regs); + else if (pending & STATUSF_IP7) /* cpu timer */ + do_IRQ(7, regs); + else { + /* + * Now look at the extended interrupts + */ + pending = (read_c0_cause() & (read_c0_intcontrol() << 8)) >> 16; + + if (pending & STATUSF_IP8) /* int6 hardware line */ + do_IRQ(8, regs); + else if (pending & STATUSF_IP9) /* int7 hardware line */ + do_IRQ(9, regs); + else if (pending & STATUSF_IP10) /* int8 hardware line */ + do_IRQ(10, regs); + else if (pending & STATUSF_IP11) /* int9 hardware line */ + do_IRQ(11, regs); + } +} void __init arch_init_irq(void) { @@ -59,9 +90,6 @@ void __init arch_init_irq(void) clear_c0_status(ST0_IM); local_irq_disable(); - /* Sets the first-level interrupt dispatcher. */ - set_except_vector(0, ocelot_handle_int); - mips_cpu_irq_init(0); rm7k_cpu_irq_init(8); } diff --git a/arch/mips/ite-boards/generic/Makefile b/arch/mips/ite-boards/generic/Makefile index 0e7853f..6343153 100644 --- a/arch/mips/ite-boards/generic/Makefile +++ b/arch/mips/ite-boards/generic/Makefile @@ -6,7 +6,7 @@ # Makefile for the ITE 8172 (qed-4n-s01b) board, generic files. # -obj-y += it8172_setup.o irq.o int-handler.o pmon_prom.o \ +obj-y += it8172_setup.o irq.o pmon_prom.o \ time.o lpc.o puts.o reset.o obj-$(CONFIG_IT8172_CIR)+= it8172_cir.o diff --git a/arch/mips/ite-boards/generic/int-handler.S b/arch/mips/ite-boards/generic/int-handler.S deleted file mode 100644 index d190d8a..0000000 --- a/arch/mips/ite-boards/generic/int-handler.S +++ /dev/null @@ -1,63 +0,0 @@ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - - .text - .set macro - .set noat - .align 5 - -NESTED(it8172_IRQ, PT_SIZE, sp) - SAVE_ALL - CLI # Important: mark KERNEL mode ! - - /* We're working with 'reorder' set at this point. */ - /* - * Get pending interrupts - */ - - mfc0 t0,CP0_CAUSE # get pending interrupts - mfc0 t1,CP0_STATUS # get enabled interrupts - and t0,t1 # isolate allowed ones - - andi t0,0xff00 # isolate pending bits - beqz t0, 3f # spurious interrupt - - andi a0, t0, CAUSEF_IP7 - beq a0, zero, 1f - - li a0, 127 # MIPS_CPU_TIMER_IRQ = (NR_IRQS-1) - move a1, sp - jal ll_timer_interrupt - j ret_from_irq - nop - -1: - andi a0, t0, CAUSEF_IP2 # the only int we expect at this time - beq a0, zero, 3f - move a0,sp - jal it8172_hw0_irqdispatch - - mfc0 t0,CP0_STATUS # disable interrupts - ori t0,1 - xori t0,1 - mtc0 t0,CP0_STATUS - nop - nop - nop - - la a1, ret_from_irq - jr a1 - nop - -3: - move a0, sp - jal mips_spurious_interrupt - nop - la a1, ret_from_irq - jr a1 - nop - -END(it8172_IRQ) - diff --git a/arch/mips/ite-boards/generic/irq.c b/arch/mips/ite-boards/generic/irq.c index 8c1cdfc..77be721 100644 --- a/arch/mips/ite-boards/generic/irq.c +++ b/arch/mips/ite-boards/generic/irq.c @@ -64,7 +64,6 @@ extern void set_debug_traps(void); extern void mips_timer_interrupt(int irq, struct pt_regs *regs); -extern asmlinkage void it8172_IRQ(void); struct it8172_intc_regs volatile *it8172_hw0_icregs = (struct it8172_intc_regs volatile *)(KSEG1ADDR(IT8172_PCI_IO_BASE + IT_INTC_BASE)); @@ -178,8 +177,6 @@ void __init arch_init_irq(void) int i; unsigned long flags; - set_except_vector(0, it8172_IRQ); - /* mask all interrupts */ it8172_hw0_icregs->lb_mask = 0xffff; it8172_hw0_icregs->lpc_mask = 0xffff; @@ -279,6 +276,18 @@ void it8172_hw0_irqdispatch(struct pt_regs *regs) do_IRQ(irq, regs); } +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; + + if (!pending) + mips_spurious_interrupt(regs); + else if (pending & CAUSEF_IP7) + ll_timer_interrupt(127, regs); + else if (pending & CAUSEF_IP2) + it8172_hw0_irqdispatch(regs); +} + void show_pending_irqs(void) { fputs("intstatus: "); diff --git a/arch/mips/jazz/Makefile b/arch/mips/jazz/Makefile index 8574924..02bd39a 100644 --- a/arch/mips/jazz/Makefile +++ b/arch/mips/jazz/Makefile @@ -2,6 +2,6 @@ # Makefile for the Jazz family specific parts of the kernel # -obj-y := int-handler.o irq.o jazzdma.o reset.o setup.o +obj-y := irq.o jazzdma.o reset.o setup.o EXTRA_AFLAGS := $(CFLAGS) diff --git a/arch/mips/jazz/int-handler.S b/arch/mips/jazz/int-handler.S deleted file mode 100644 index e35f5fcd..0000000 --- a/arch/mips/jazz/int-handler.S +++ /dev/null @@ -1,283 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 1995, 1996, 1997, 1998 by Ralf Baechle and Andreas Busse - * - * Jazz family specific interrupt stuff - * - * To do: On Jazz machines we remap some non-ISA interrupts to ISA - * interrupts. These interrupts should use their own vectors. - * Squeeze the last cycles out of the handlers. Only a dead - * cycle is a good cycle. - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/jazz.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - -/* - * jazz_handle_int: Interrupt handler for the ACER Pica-61 boards - */ - .set noreorder - - NESTED(jazz_handle_int, PT_SIZE, ra) - .set noat - SAVE_ALL - CLI - .set at - - /* - * Get pending interrupts - */ - mfc0 t0,CP0_CAUSE # get pending interrupts - mfc0 t1,CP0_STATUS # get enabled interrupts - and t0,t1 # isolate allowed ones - andi t0,0xff00 # isolate pending bits - beqz t0,3f - sll t0,16 # delay slot - - /* - * Find irq with highest priority - * FIXME: This is slow - use binary search - */ - la t1,ll_vectors -1: bltz t0,2f # found pending irq - sll t0,1 - b 1b - subu t1,PTRSIZE # delay slot - - /* - * Do the low-level stuff - */ -2: lw t0,(t1) - jr t0 - nop # delay slot - END(jazz_handle_int) - -ll_sw0: li s1,~IE_SW0 - mfc0 t0,CP0_CAUSE - and t0,s1 - mtc0 t0,CP0_CAUSE - PANIC("Unimplemented sw0 handler") - -ll_sw1: li s1,~IE_SW1 - mfc0 t0,CP0_CAUSE - and t0,s1 - mtc0 t0,CP0_CAUSE - PANIC("Unimplemented sw1 handler") - -ll_local_dma: li s1,~IE_IRQ0 - PANIC("Unimplemented local_dma handler") - -ll_local_dev: lbu t0,JAZZ_IO_IRQ_SOURCE -#if PTRSIZE == 8 /* True 64 bit kernel */ - dsll t0,1 -#endif - .set reorder - LONG_L t0,local_vector(t0) - jr t0 - .set noreorder - -/* - * The braindead PICA hardware gives us no way to distinguish if we really - * received interrupt 7 from the (E)ISA bus or if we just received an - * interrupt with no findable cause. This sometimes happens with braindead - * cards. Oh well - for all the Jazz boxes slots are more or less just - * whistles and bells and we're aware of the problem. - */ -ll_isa_irq: lw a0, JAZZ_EISA_IRQ_ACK - - jal do_IRQ - move a1,sp - - j ret_from_irq - nop - -/* - * Hmm... This is not just a plain PC clone so the question is - * which devices on Jazz machines can generate an (E)ISA NMI? - * (Writing to nonexistent memory?) - */ -ll_isa_nmi: li s1,~IE_IRQ3 - PANIC("Unimplemented isa_nmi handler") - -/* - * Timer IRQ - remapped to be more similar to an IBM compatible. - * - * The timer interrupt is handled specially to ensure that the jiffies - * variable is updated at all times. Specifically, the timer interrupt is - * just like the complete handlers except that it is invoked with interrupts - * disabled and should never re-enable them. If other interrupts were - * allowed to be processed while the timer interrupt is active, then the - * other interrupts would have to avoid using the jiffies variable for delay - * and interval timing operations to avoid hanging the system. - */ -ll_timer: lw zero,JAZZ_TIMER_REGISTER # timer irq cleared on read - li s1,~IE_IRQ4 - - li a0, JAZZ_TIMER_IRQ - jal do_IRQ - move a1,sp - - mfc0 t0,CP0_STATUS # disable interrupts again - ori t0,1 - xori t0,1 - mtc0 t0,CP0_STATUS - - j ret_from_irq - nop - -/* - * CPU count/compare IRQ (unused) - */ -ll_count: j ret_from_irq - mtc0 zero,CP0_COMPARE - -#if 0 -/* - * Call the handler for the interrupt - * (Currently unused) - */ -call_real: /* - * temporarily disable interrupt - */ - mfc0 t2,CP0_STATUS - and t2,s1 - mtc0 t2,CP0_STATUS - nor s1,zero,s1 - jal do_IRQ - - /* - * reenable interrupt - */ - mfc0 t2,CP0_STATUS - or t2,s1 - mtc0 t2,CP0_STATUS - j ret_from_irq -#endif - - .data - PTR ll_sw0 # SW0 - PTR ll_sw1 # SW1 - PTR ll_local_dma # Local DMA - PTR ll_local_dev # Local devices - PTR ll_isa_irq # ISA IRQ - PTR ll_isa_nmi # ISA NMI - PTR ll_timer # Timer -ll_vectors: PTR ll_count # Count/Compare IRQ - - /* - * Interrupt handlers for local devices. - */ - .text - .set reorder -loc_no_irq: PANIC("Unimplemented loc_no_irq handler") -/* - * Parallel port IRQ - */ -loc_parallel: li s1,~JAZZ_IE_PARALLEL - li a0,JAZZ_PARALLEL_IRQ - b loc_call - -/* - * Floppy IRQ - */ -loc_floppy: li s1,~JAZZ_IE_FLOPPY - li a0,JAZZ_FLOPPY_IRQ - b loc_call - -/* - * Sound IRQ - */ -loc_sound: PANIC("Unimplemented loc_sound handler") -loc_video: PANIC("Unimplemented loc_video handler") - -/* - * Ethernet interrupt handler - */ -loc_ethernet: li s1,~JAZZ_IE_ETHERNET - li a0,JAZZ_ETHERNET_IRQ - b loc_call - -/* - * SCSI interrupt handler - */ -loc_scsi: li s1,~JAZZ_IE_SCSI - li a0,JAZZ_SCSI_IRQ - b loc_call - -/* - * Keyboard interrupt handler - */ -loc_keyboard: li s1,~JAZZ_IE_KEYBOARD - li a0,JAZZ_KEYBOARD_IRQ - b loc_call - -/* - * Mouse interrupt handler - */ -loc_mouse: li s1,~JAZZ_IE_MOUSE - li a0,JAZZ_MOUSE_IRQ - b loc_call - -/* - * Serial port 1 IRQ - */ -loc_serial1: li s1,~JAZZ_IE_SERIAL1 - li a0,JAZZ_SERIAL1_IRQ - b loc_call - -/* - * Serial port 2 IRQ - */ -loc_serial2: li s1,~JAZZ_IE_SERIAL2 - li a0,JAZZ_SERIAL2_IRQ - b loc_call - -/* - * Call the interrupt handler for an interrupt generated by a - * local device. - */ -loc_call: /* - * Temporarily disable interrupt source - */ - lhu t2,JAZZ_IO_IRQ_ENABLE - and t2,s1 - sh t2,JAZZ_IO_IRQ_ENABLE - - nor s1,zero,s1 - jal do_IRQ - - /* - * Reenable interrupt - */ - lhu t2,JAZZ_IO_IRQ_ENABLE - or t2,s1 - sh t2,JAZZ_IO_IRQ_ENABLE - - j ret_from_irq - -/* - * "Jump extender" to reach spurious_interrupt - */ -3: jal spurious_interrupt - j ret_from_irq - -/* - * Vectors for interrupts generated by local devices - */ - .data -local_vector: PTR loc_no_irq - PTR loc_parallel - PTR loc_floppy - PTR loc_sound - PTR loc_video - PTR loc_ethernet - PTR loc_scsi - PTR loc_keyboard - PTR loc_mouse - PTR loc_serial1 - PTR loc_serial2 diff --git a/arch/mips/jazz/irq.c b/arch/mips/jazz/irq.c index b309b1b..becc9ac 100644 --- a/arch/mips/jazz/irq.c +++ b/arch/mips/jazz/irq.c @@ -15,8 +15,6 @@ #include <asm/io.h> #include <asm/jazz.h> -extern asmlinkage void jazz_handle_int(void); - static DEFINE_SPINLOCK(r4030_lock); static void enable_r4030_irq(unsigned int irq) @@ -90,10 +88,82 @@ void __init init_r4030_ints(void) */ void __init arch_init_irq(void) { - set_except_vector(0, jazz_handle_int); - init_i8259_irqs(); /* Integrated i8259 */ init_r4030_ints(); change_c0_status(ST0_IM, IE_IRQ4 | IE_IRQ3 | IE_IRQ2 | IE_IRQ1); } + +static void loc_call(unsigned int irq, struct pt_regs *regs, unsigned int mask) +{ + r4030_write_reg16(JAZZ_IO_IRQ_ENABLE, + r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) & mask); + do_IRQ(irq, regs); + r4030_write_reg16(JAZZ_IO_IRQ_ENABLE, + r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) | mask); +} + +static void ll_local_dev(struct pt_regs *regs) +{ + switch (r4030_read_reg32(JAZZ_IO_IRQ_SOURCE)) { + case 0: + panic("Unimplemented loc_no_irq handler"); + break; + case 4: + loc_call(JAZZ_PARALLEL_IRQ, regs, JAZZ_IE_PARALLEL); + break; + case 8: + loc_call(JAZZ_PARALLEL_IRQ, regs, JAZZ_IE_FLOPPY); + break; + case 12: + panic("Unimplemented loc_sound handler"); + break; + case 16: + panic("Unimplemented loc_video handler"); + break; + case 20: + loc_call(JAZZ_ETHERNET_IRQ, regs, JAZZ_IE_ETHERNET); + break; + case 24: + loc_call(JAZZ_SCSI_IRQ, regs, JAZZ_IE_SCSI); + break; + case 28: + loc_call(JAZZ_KEYBOARD_IRQ, regs, JAZZ_IE_KEYBOARD); + break; + case 32: + loc_call(JAZZ_MOUSE_IRQ, regs, JAZZ_IE_MOUSE); + break; + case 36: + loc_call(JAZZ_SERIAL1_IRQ, regs, JAZZ_IE_SERIAL1); + break; + case 40: + loc_call(JAZZ_SERIAL2_IRQ, regs, JAZZ_IE_SERIAL2); + break; + } +} + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; + + if (pending & IE_IRQ5) + write_c0_compare(0); + else if (pending & IE_IRQ4) { + r4030_read_reg32(JAZZ_TIMER_REGISTER); + do_IRQ(JAZZ_TIMER_IRQ, regs); + } else if (pending & IE_IRQ3) + panic("Unimplemented ISA NMI handler"); + else if (pending & IE_IRQ2) + do_IRQ(r4030_read_reg32(JAZZ_EISA_IRQ_ACK), regs); + else if (pending & IE_IRQ1) { + ll_local_dev(regs); + } else if (unlikely(pending & IE_IRQ0)) + panic("Unimplemented local_dma handler"); + else if (pending & IE_SW1) { + clear_c0_cause(IE_SW1); + panic("Unimplemented sw1 handler"); + } else if (pending & IE_SW0) { + clear_c0_cause(IE_SW0); + panic("Unimplemented sw0 handler"); + } +} diff --git a/arch/mips/jmr3927/rbhma3100/Makefile b/arch/mips/jmr3927/rbhma3100/Makefile index 75bf418..baf5077 100644 --- a/arch/mips/jmr3927/rbhma3100/Makefile +++ b/arch/mips/jmr3927/rbhma3100/Makefile @@ -2,7 +2,7 @@ # Makefile for TOSHIBA JMR-TX3927 board # -obj-y += init.o int-handler.o irq.o setup.o +obj-y += init.o irq.o setup.o obj-$(CONFIG_RUNTIME_DEBUG) += debug.o obj-$(CONFIG_KGDB) += kgdb_io.o diff --git a/arch/mips/jmr3927/rbhma3100/int-handler.S b/arch/mips/jmr3927/rbhma3100/int-handler.S deleted file mode 100644 index f85bbf4..0000000 --- a/arch/mips/jmr3927/rbhma3100/int-handler.S +++ /dev/null @@ -1,74 +0,0 @@ -/* - * Copyright 2001 MontaVista Software Inc. - * Author: MontaVista Software, Inc. - * ahennessy@mvista.com - * - * Based on arch/mips/tsdb/kernel/int-handler.S - * - * Copyright (C) 2000-2001 Toshiba Corporation - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN - * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON - * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> -#include <asm/jmr3927/jmr3927.h> - - /* A lot of complication here is taken away because: - * - * 1) We handle one interrupt and return, sitting in a loop - * and moving across all the pending IRQ bits in the cause - * register is _NOT_ the answer, the common case is one - * pending IRQ so optimize in that direction. - * - * 2) We need not check against bits in the status register - * IRQ mask, that would make this routine slow as hell. - * - * 3) Linux only thinks in terms of all IRQs on or all IRQs - * off, nothing in between like BSD spl() brain-damage. - * - */ - -/* Flush write buffer (needed?) - * NOTE: TX39xx performs "non-blocking load", so explicitly use the target - * register of LBU to flush immediately. - */ -#define FLUSH_WB(tmp) \ - la tmp, JMR3927_IOC_REV_ADDR; \ - lbu tmp, (tmp); \ - move tmp, zero; - - .text - .set noreorder - .set noat - .align 5 - NESTED(jmr3927_IRQ, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - jal jmr3927_irc_irqdispatch - move a0, sp - FLUSH_WB(t0) - j ret_from_irq - nop - END(jmr3927_IRQ) diff --git a/arch/mips/jmr3927/rbhma3100/irq.c b/arch/mips/jmr3927/rbhma3100/irq.c index 2810727..11304d13 100644 --- a/arch/mips/jmr3927/rbhma3100/irq.c +++ b/arch/mips/jmr3927/rbhma3100/irq.c @@ -77,8 +77,6 @@ static int jmr3927_gen_iack(void) } #endif -extern asmlinkage void jmr3927_IRQ(void); - #define irc_dlevel 0 #define irc_elevel 1 @@ -262,7 +260,7 @@ void jmr3927_spurious(struct pt_regs *regs) regs->cp0_cause, regs->cp0_epc, regs->regs[31]); } -void jmr3927_irc_irqdispatch(struct pt_regs *regs) +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) { int irq; @@ -398,8 +396,6 @@ void __init arch_init_irq(void) jmr3927_irq_init(NR_ISA_IRQS); - set_except_vector(0, jmr3927_IRQ); - /* setup irq space */ add_tb_irq_space(&jmr3927_isac_irqspace); add_tb_irq_space(&jmr3927_ioc_irqspace); diff --git a/arch/mips/kernel/genex.S b/arch/mips/kernel/genex.S index 13f22d1..04418b6 100644 --- a/arch/mips/kernel/genex.S +++ b/arch/mips/kernel/genex.S @@ -122,6 +122,20 @@ handle_vcei: .set pop END(except_vec3_r4000) + __FINIT + + .align 5 +NESTED(handle_int, PT_SIZE, sp) + SAVE_ALL + CLI + + PTR_LA ra, ret_from_irq + move a0, sp + j plat_irq_dispatch + END(handle_int) + + __INIT + /* * Special interrupt vector for MIPS64 ISA & embedded MIPS processors. * This is a dedicated interrupt exception vector which reduces the diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 8573190..61efc61 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -42,6 +42,7 @@ #include <asm/watch.h> #include <asm/types.h> +extern asmlinkage void handle_int(void); extern asmlinkage void handle_tlbm(void); extern asmlinkage void handle_tlbl(void); extern asmlinkage void handle_tlbs(void); @@ -1296,6 +1297,7 @@ void __init trap_init(void) if (board_be_init) board_be_init(); + set_except_vector(0, handle_int); set_except_vector(1, handle_tlbm); set_except_vector(2, handle_tlbl); set_except_vector(3, handle_tlbs); diff --git a/arch/mips/lasat/Makefile b/arch/mips/lasat/Makefile index 0d5aec4..99f5046 100644 --- a/arch/mips/lasat/Makefile +++ b/arch/mips/lasat/Makefile @@ -3,7 +3,7 @@ # obj-y += reset.o setup.o prom.o lasat_board.o \ - at93c.o interrupt.o lasatIRQ.o + at93c.o interrupt.o obj-$(CONFIG_LASAT_SYSCTL) += sysctl.o obj-$(CONFIG_DS1603) += ds1603.o diff --git a/arch/mips/lasat/interrupt.c b/arch/mips/lasat/interrupt.c index 852a419..2d3472b 100644 --- a/arch/mips/lasat/interrupt.c +++ b/arch/mips/lasat/interrupt.c @@ -27,14 +27,13 @@ #include <asm/bootinfo.h> #include <asm/irq.h> #include <asm/lasat/lasatint.h> +#include <asm/time.h> #include <asm/gdb-stub.h> static volatile int *lasat_int_status = NULL; static volatile int *lasat_int_mask = NULL; static volatile int lasat_int_mask_shift; -extern asmlinkage void lasatIRQ(void); - void disable_lasat_irq(unsigned int irq_nr) { unsigned long flags; @@ -109,11 +108,17 @@ static unsigned long get_int_status_200(void) return int_status; } -void lasat_hw0_irqdispatch(struct pt_regs *regs) +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) { unsigned long int_status; + unsigned int cause = read_c0_cause(); int irq; + if (cause & CAUSEF_IP7) { /* R4000 count / compare IRQ */ + ll_timer_interrupt(7, regs); + return; + } + int_status = get_int_status(); /* if int_status == 0, then the interrupt has already been cleared */ @@ -147,9 +152,6 @@ void __init arch_init_irq(void) panic("arch_init_irq: mips_machtype incorrect"); } - /* Now safe to set the exception vector. */ - set_except_vector(0, lasatIRQ); - for (i = 0; i <= LASATINT_END; i++) { irq_desc[i].status = IRQ_DISABLED; irq_desc[i].action = 0; diff --git a/arch/mips/lasat/lasatIRQ.S b/arch/mips/lasat/lasatIRQ.S deleted file mode 100644 index 2a2b0d0..0000000 --- a/arch/mips/lasat/lasatIRQ.S +++ /dev/null @@ -1,69 +0,0 @@ -/* - * Carsten Langgaard, carstenl@mips.com - * Copyright (C) 1999, 2000 MIPS Technologies, Inc. All rights reserved. - * - * This program is free software; you can distribute it and/or modify it - * under the terms of the GNU General Public License (Version 2) as - * published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. - * - * Interrupt exception dispatch code. - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - - .text - .set noreorder - .align 5 - NESTED(lasatIRQ, PT_SIZE, sp) - .set noat - SAVE_ALL - CLI - .set at - .set noreorder - - mfc0 s0, CP0_CAUSE # get irq mask - - /* First we check for r4k counter/timer IRQ. */ - andi a0, s0, CAUSEF_IP7 - beq a0, zero, 1f - andi a0, s0, CAUSEF_IP2 # delay slot, check hw0 interrupt - - /* Wheee, a timer interrupt. */ - li a0, 7 - jal ll_timer_interrupt - move a1, sp - - j ret_from_irq - nop - -1: - /* Wheee, combined hardware level zero interrupt. */ - jal lasat_hw0_irqdispatch - move a0, sp # delay slot - - j ret_from_irq - nop # delay slot - -1: - /* - * Here by mistake? This is possible, what can happen is that by the - * time we take the exception the IRQ pin goes low, so just leave if - * this is the case. - */ - move a1,s0 - mfc0 a1, CP0_EPC - - j ret_from_irq - nop - END(lasatIRQ) diff --git a/arch/mips/mips-boards/atlas/Makefile b/arch/mips/mips-boards/atlas/Makefile index 50fec2a..d8dab75 100644 --- a/arch/mips/mips-boards/atlas/Makefile +++ b/arch/mips/mips-boards/atlas/Makefile @@ -16,5 +16,5 @@ # 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. # -obj-y := atlas_int.o atlas-irq.o atlas_setup.o +obj-y := atlas_int.o atlas_setup.o obj-$(CONFIG_KGDB) += atlas_gdb.o diff --git a/arch/mips/mips-boards/atlas/atlas-irq.S b/arch/mips/mips-boards/atlas/atlas-irq.S deleted file mode 100644 index 31bc99a..0000000 --- a/arch/mips/mips-boards/atlas/atlas-irq.S +++ /dev/null @@ -1,120 +0,0 @@ -/* - * Carsten Langgaard, carstenl@mips.com - * Copyright (C) 1999, 2000 MIPS Technologies, Inc. All rights reserved. - * - * This program is free software; you can distribute it and/or modify it - * under the terms of the GNU General Public License (Version 2) as - * published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. - * - * Interrupt exception dispatch code. - */ -#include <linux/config.h> - -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> -#include <asm/mips-boards/atlasint.h> - -/* - * Furthermore, the IRQs on the MIPS board look basically (barring software - * IRQs which we don't use at all and all external interrupt sources are - * combined together on hardware interrupt 0 (MIPS IRQ 2)) like: - * - * MIPS IRQ Source - * -------- ------ - * 0 Software (ignored) - * 1 Software (ignored) - * 2 Combined hardware interrupt (hw0) - * 3 Hardware (ignored) - * 4 Hardware (ignored) - * 5 Hardware (ignored) - * 6 Hardware (ignored) - * 7 R4k timer (what we use) - * - * Note: On the SEAD board thing are a little bit different. - * Here IRQ 2 (hw0) is wired to the UART0 and IRQ 3 (hw1) is wired - * wired to UART1. - * - * We handle the IRQ according to _our_ priority which is: - * - * Highest ---- R4k Timer - * Lowest ---- Combined hardware interrupt - * - * then we just return, if multiple IRQs are pending then we will just take - * another exception, big deal. - */ - - .text - .set noreorder - .set noat - .align 5 - NESTED(mipsIRQ, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - - mfc0 s0, CP0_CAUSE # get irq bits - mfc0 s1, CP0_STATUS # get irq mask - andi s0, ST0_IM # CAUSE.CE may be non-zero! - and s0, s1 - -#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) - .set mips32 - clz a0, s0 - .set mips0 - negu a0 - addu a0, 31-CAUSEB_IP - bltz a0, spurious -#else - beqz s0, spurious - li a0, 7 - - and t0, s0, 0xf000 - sltiu t0, t0, 1 - sll t0, 2 - subu a0, t0 - sll s0, t0 - - and t0, s0, 0xc000 - sltiu t0, t0, 1 - sll t0, 1 - subu a0, t0 - sll s0, t0 - - and t0, s0, 0x8000 - sltiu t0, t0, 1 - # sll t0, 0 - subu a0, t0 - # sll s0, t0 -#endif - - li a1, MIPSCPU_INT_ATLAS - bne a0, a1, 1f - addu a0, MIPSCPU_INT_BASE - - jal atlas_hw0_irqdispatch - move a0, sp - - j ret_from_irq - nop - -1: jal do_IRQ - move a1, sp - - j ret_from_irq - nop - -spurious: - j spurious_interrupt - nop - END(mipsIRQ) diff --git a/arch/mips/mips-boards/atlas/atlas_int.c b/arch/mips/mips-boards/atlas/atlas_int.c index bc0ebc6..db53950 100644 --- a/arch/mips/mips-boards/atlas/atlas_int.c +++ b/arch/mips/mips-boards/atlas/atlas_int.c @@ -39,8 +39,6 @@ static struct atlas_ictrl_regs *atlas_hw0_icregs; -extern asmlinkage void mipsIRQ(void); - #if 0 #define DEBUG_INT(x...) printk(x) #else @@ -98,7 +96,7 @@ static inline int ls1bit32(unsigned int x) return b; } -void atlas_hw0_irqdispatch(struct pt_regs *regs) +static inline void atlas_hw0_irqdispatch(struct pt_regs *regs) { unsigned long int_status; int irq; @@ -116,6 +114,91 @@ void atlas_hw0_irqdispatch(struct pt_regs *regs) do_IRQ(irq, regs); } +static inline int clz(unsigned long x) +{ + __asm__ ( + " .set push \n" + " .set mips32 \n" + " clz %0, %1 \n" + " .set pop \n" + : "=r" (x) + : "r" (x)); + + return x; +} + +/* + * Version of ffs that only looks at bits 12..15. + */ +static inline unsigned int irq_ffs(unsigned int pending) +{ +#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) + return -clz(pending) + 31 - CAUSEB_IP; +#else + unsigned int a0 = 7; + unsigned int t0; + + t0 = s0 & 0xf000; + t0 = t0 < 1; + t0 = t0 << 2; + a0 = a0 - t0; + s0 = s0 << t0; + + t0 = s0 & 0xc000; + t0 = t0 < 1; + t0 = t0 << 1; + a0 = a0 - t0; + s0 = s0 << t0; + + t0 = s0 & 0x8000; + t0 = t0 < 1; + //t0 = t0 << 2; + a0 = a0 - t0; + //s0 = s0 << t0; + + return a0; +#endif +} + +/* + * IRQs on the Atlas board look basically (barring software IRQs which we + * don't use at all and all external interrupt sources are combined together + * on hardware interrupt 0 (MIPS IRQ 2)) like: + * + * MIPS IRQ Source + * -------- ------ + * 0 Software (ignored) + * 1 Software (ignored) + * 2 Combined hardware interrupt (hw0) + * 3 Hardware (ignored) + * 4 Hardware (ignored) + * 5 Hardware (ignored) + * 6 Hardware (ignored) + * 7 R4k timer (what we use) + * + * We handle the IRQ according to _our_ priority which is: + * + * Highest ---- R4k Timer + * Lowest ---- Combined hardware interrupt + * + * then we just return, if multiple IRQs are pending then we will just take + * another exception, big deal. + */ +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; + int irq; + + irq = irq_ffs(pending); + + if (irq == MIPSCPU_INT_ATLAS) + atlas_hw0_irqdispatch(regs); + else if (irq > 0) + do_IRQ(MIPSCPU_INT_BASE + irq, regs); + else + spurious_interrupt(regs); +} + void __init arch_init_irq(void) { int i; @@ -128,9 +211,6 @@ void __init arch_init_irq(void) */ atlas_hw0_icregs->intrsten = 0xffffffff; - /* Now safe to set the exception vector. */ - set_except_vector(0, mipsIRQ); - for (i = ATLASINT_BASE; i <= ATLASINT_END; i++) { irq_desc[i].status = IRQ_DISABLED; irq_desc[i].action = 0; diff --git a/arch/mips/mips-boards/malta/Makefile b/arch/mips/mips-boards/malta/Makefile index 3ae8fe6..fd4c143 100644 --- a/arch/mips/mips-boards/malta/Makefile +++ b/arch/mips/mips-boards/malta/Makefile @@ -19,4 +19,4 @@ # under Linux. # -obj-y := malta_int.o malta-irq.o malta_setup.o +obj-y := malta_int.o malta_setup.o diff --git a/arch/mips/mips-boards/malta/malta-irq.S b/arch/mips/mips-boards/malta/malta-irq.S deleted file mode 100644 index 6217aff..0000000 --- a/arch/mips/mips-boards/malta/malta-irq.S +++ /dev/null @@ -1,122 +0,0 @@ -/* - * Carsten Langgaard, carstenl@mips.com - * Copyright (C) 1999, 2000 MIPS Technologies, Inc. All rights reserved. - * - * ######################################################################## - * - * This program is free software; you can distribute it and/or modify it - * under the terms of the GNU General Public License (Version 2) as - * published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. - * - * ######################################################################## - * - * Interrupt exception dispatch code. - * - */ -#include <linux/config.h> - -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> -#include <asm/mips-boards/maltaint.h> - -/* - * IRQs on the Malta board look basically (barring software IRQs which we - * don't use at all and all external interrupt sources are combined together - * on hardware interrupt 0 (MIPS IRQ 2)) like: - * - * MIPS IRQ Source - * -------- ------ - * 0 Software (ignored) - * 1 Software (ignored) - * 2 Combined hardware interrupt (hw0) - * 3 Hardware (ignored) - * 4 Hardware (ignored) - * 5 Hardware (ignored) - * 6 Hardware (ignored) - * 7 R4k timer (what we use) - * - * We handle the IRQ according to _our_ priority which is: - * - * Highest ---- R4k Timer - * Lowest ---- Combined hardware interrupt - * - * then we just return, if multiple IRQs are pending then we will just take - * another exception, big deal. - */ - - .text - .set noreorder - .set noat - .align 5 - NESTED(mipsIRQ, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - - mfc0 s0, CP0_CAUSE # get irq bits - mfc0 s1, CP0_STATUS # get irq mask - andi s0, ST0_IM # CAUSE.CE may be non-zero! - and s0, s1 - -#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) - .set mips32 - clz a0, s0 - .set mips0 - negu a0 - addu a0, 31-CAUSEB_IP - bltz a0, spurious -#else - beqz s0, spurious - li a0, 7 - - and t0, s0, 0xf000 - sltiu t0, t0, 1 - sll t0, 2 - subu a0, t0 - sll s0, t0 - - and t0, s0, 0xc000 - sltiu t0, t0, 1 - sll t0, 1 - subu a0, t0 - sll s0, t0 - - and t0, s0, 0x8000 - sltiu t0, t0, 1 - # sll t0, 0 - subu a0, t0 - # sll s0, t0 -#endif - - li a1, MIPSCPU_INT_I8259A - bne a0, a1, 1f - addu a0, MIPSCPU_INT_BASE - - jal malta_hw0_irqdispatch - move a0, sp - - j ret_from_irq - nop -1: - - jal do_IRQ - move a1, sp - - j ret_from_irq - nop - -spurious: - j spurious_interrupt - nop - END(mipsIRQ) diff --git a/arch/mips/mips-boards/malta/malta_int.c b/arch/mips/mips-boards/malta/malta_int.c index d06dc5ad..1da8c18 100644 --- a/arch/mips/mips-boards/malta/malta_int.c +++ b/arch/mips/mips-boards/malta/malta_int.c @@ -40,7 +40,6 @@ #include <asm/mips-boards/msc01_pci.h> #include <asm/msc01_ic.h> -extern asmlinkage void mipsIRQ(void); extern void mips_timer_interrupt(void); static DEFINE_SPINLOCK(mips_irq_lock); @@ -114,7 +113,7 @@ static inline int get_int(void) return irq; } -void malta_hw0_irqdispatch(struct pt_regs *regs) +static void malta_hw0_irqdispatch(struct pt_regs *regs) { int irq; @@ -182,6 +181,92 @@ void corehi_irqdispatch(struct pt_regs *regs) die("CoreHi interrupt", regs); } +static inline int clz(unsigned long x) +{ + __asm__ ( + " .set push \n" + " .set mips32 \n" + " clz %0, %1 \n" + " .set pop \n" + : "=r" (x) + : "r" (x)); + + return x; +} + +/* + * Version of ffs that only looks at bits 12..15. + */ +static inline unsigned int irq_ffs(unsigned int pending) +{ +#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) + return -clz(pending) + 31 - CAUSEB_IP; +#else + unsigned int a0 = 7; + unsigned int t0; + + t0 = s0 & 0xf000; + t0 = t0 < 1; + t0 = t0 << 2; + a0 = a0 - t0; + s0 = s0 << t0; + + t0 = s0 & 0xc000; + t0 = t0 < 1; + t0 = t0 << 1; + a0 = a0 - t0; + s0 = s0 << t0; + + t0 = s0 & 0x8000; + t0 = t0 < 1; + //t0 = t0 << 2; + a0 = a0 - t0; + //s0 = s0 << t0; + + return a0; +#endif +} + +/* + * IRQs on the Malta board look basically (barring software IRQs which we + * don't use at all and all external interrupt sources are combined together + * on hardware interrupt 0 (MIPS IRQ 2)) like: + * + * MIPS IRQ Source + * -------- ------ + * 0 Software (ignored) + * 1 Software (ignored) + * 2 Combined hardware interrupt (hw0) + * 3 Hardware (ignored) + * 4 Hardware (ignored) + * 5 Hardware (ignored) + * 6 Hardware (ignored) + * 7 R4k timer (what we use) + * + * We handle the IRQ according to _our_ priority which is: + * + * Highest ---- R4k Timer + * Lowest ---- Combined hardware interrupt + * + * then we just return, if multiple IRQs are pending then we will just take + * another exception, big deal. + */ + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; + int irq; + + irq = irq_ffs(pending); + + if (irq == MIPSCPU_INT_I8259A) + malta_hw0_irqdispatch(regs); + else if (irq > 0) + do_IRQ(MIPSCPU_INT_BASE + irq, regs); + else + spurious_interrupt(regs); +} + static struct irqaction i8259irq = { .handler = no_action, .name = "XT-PIC cascade" @@ -214,7 +299,6 @@ int __initdata msc_nr_eicirqs = sizeof(msc_eicirqmap)/sizeof(msc_irqmap_t); void __init arch_init_irq(void) { - set_except_vector(0, mipsIRQ); init_i8259_irqs(); if (!cpu_has_veic) @@ -245,7 +329,6 @@ void __init arch_init_irq(void) setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction); } else { - set_except_vector(0, mipsIRQ); setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_I8259A, &i8259irq); setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction); } diff --git a/arch/mips/mips-boards/sead/Makefile b/arch/mips/mips-boards/sead/Makefile index 01780b6..224bb84 100644 --- a/arch/mips/mips-boards/sead/Makefile +++ b/arch/mips/mips-boards/sead/Makefile @@ -23,4 +23,4 @@ # under Linux. # -obj-y := sead_int.o sead-irq.o sead_setup.o +obj-y := sead_int.o sead_setup.o diff --git a/arch/mips/mips-boards/sead/sead-irq.S b/arch/mips/mips-boards/sead/sead-irq.S deleted file mode 100644 index d5dea1d..0000000 --- a/arch/mips/mips-boards/sead/sead-irq.S +++ /dev/null @@ -1,111 +0,0 @@ -/* - * Carsten Langgaard, carstenl@mips.com - * Copyright (C) 1999, 2000 MIPS Technologies, Inc. All rights reserved. - * - * ######################################################################## - * - * This program is free software; you can distribute it and/or modify it - * under the terms of the GNU General Public License (Version 2) as - * published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. - * - * ######################################################################## - * - * Interrupt exception dispatch code. - * - */ -#include <linux/config.h> - -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> -#include <asm/mips-boards/seadint.h> - -/* - * IRQs on the SEAD board look basically are combined together on hardware - * interrupt 0 (MIPS IRQ 2)) like: - * - * MIPS IRQ Source - * -------- ------ - * 0 Software (ignored) - * 1 Software (ignored) - * 2 UART0 (hw0) - * 3 UART1 (hw1) - * 4 Hardware (ignored) - * 5 Hardware (ignored) - * 6 Hardware (ignored) - * 7 R4k timer (what we use) - * - * We handle the IRQ according to _our_ priority which is: - * - * Highest ---- R4k Timer - * Lowest ---- Combined hardware interrupt - * - * then we just return, if multiple IRQs are pending then we will just take - * another exception, big deal. - */ - - .text - .set noreorder - .set noat - .align 5 - NESTED(mipsIRQ, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - - mfc0 s0, CP0_CAUSE # get irq bits - mfc0 s1, CP0_STATUS # get irq mask - andi s0, ST0_IM # CAUSE.CE may be non-zero! - and s0, s1 - -#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) - .set mips32 - clz a0, s0 - .set mips0 - negu a0 - addu a0, 31-CAUSEB_IP - bltz a0, spurious -#else - beqz s0, spurious - li a0, 7 - - and t0, s0, 0xf000 - sltiu t0, t0, 1 - sll t0, 2 - subu a0, t0 - sll s0, t0 - - and t0, s0, 0xc000 - sltiu t0, t0, 1 - sll t0, 1 - subu a0, t0 - sll s0, t0 - - and t0, s0, 0x8000 - sltiu t0, t0, 1 - # sll t0, 0 - subu a0, t0 - # sll s0, t0 -#endif - - addu a0, MIPSCPU_INT_BASE - jal do_IRQ - move a1, sp - - j ret_from_irq - nop - -spurious: - j spurious_interrupt - nop - END(mipsIRQ) diff --git a/arch/mips/mips-boards/sead/sead_int.c b/arch/mips/mips-boards/sead/sead_int.c index 90fda0d..9168d93 100644 --- a/arch/mips/mips-boards/sead/sead_int.c +++ b/arch/mips/mips-boards/sead/sead_int.c @@ -24,16 +24,94 @@ #include <linux/irq.h> #include <asm/irq_cpu.h> +#include <asm/mipsregs.h> #include <asm/system.h> #include <asm/mips-boards/seadint.h> -extern asmlinkage void mipsIRQ(void); +static inline int clz(unsigned long x) +{ + __asm__ ( + " .set push \n" + " .set mips32 \n" + " clz %0, %1 \n" + " .set pop \n" + : "=r" (x) + : "r" (x)); + + return x; +} + +/* + * Version of ffs that only looks at bits 12..15. + */ +static inline unsigned int irq_ffs(unsigned int pending) +{ +#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) + return -clz(pending) + 31 - CAUSEB_IP; +#else + unsigned int a0 = 7; + unsigned int t0; + + t0 = s0 & 0xf000; + t0 = t0 < 1; + t0 = t0 << 2; + a0 = a0 - t0; + s0 = s0 << t0; + + t0 = s0 & 0xc000; + t0 = t0 < 1; + t0 = t0 << 1; + a0 = a0 - t0; + s0 = s0 << t0; + + t0 = s0 & 0x8000; + t0 = t0 < 1; + //t0 = t0 << 2; + a0 = a0 - t0; + //s0 = s0 << t0; + + return a0; +#endif +} + +/* + * IRQs on the SEAD board look basically are combined together on hardware + * interrupt 0 (MIPS IRQ 2)) like: + * + * MIPS IRQ Source + * -------- ------ + * 0 Software (ignored) + * 1 Software (ignored) + * 2 UART0 (hw0) + * 3 UART1 (hw1) + * 4 Hardware (ignored) + * 5 Hardware (ignored) + * 6 Hardware (ignored) + * 7 R4k timer (what we use) + * + * We handle the IRQ according to _our_ priority which is: + * + * Highest ---- R4k Timer + * Lowest ---- Combined hardware interrupt + * + * then we just return, if multiple IRQs are pending then we will just take + * another exception, big deal. + */ +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; + int irq; + + irq = irq_ffs(pending); + + if (irq >= 0) + do_IRQ(MIPSCPU_INT_BASE + irq, regs); + else + spurious_interrupt(regs); +} void __init arch_init_irq(void) { mips_cpu_irq_init(MIPSCPU_INT_BASE); - - /* Now safe to set the exception vector. */ - set_except_vector(0, mipsIRQ); } diff --git a/arch/mips/mips-boards/sim/sim_int.c b/arch/mips/mips-boards/sim/sim_int.c index a4d0a2c..2c15c8e 100644 --- a/arch/mips/mips-boards/sim/sim_int.c +++ b/arch/mips/mips-boards/sim/sim_int.c @@ -25,17 +25,71 @@ extern void mips_cpu_irq_init(int); -extern asmlinkage void simIRQ(void); +static inline int clz(unsigned long x) +{ + __asm__ ( + " .set push \n" + " .set mips32 \n" + " clz %0, %1 \n" + " .set pop \n" + : "=r" (x) + : "r" (x)); + + return x; +} + +/* + * Version of ffs that only looks at bits 12..15. + */ +static inline unsigned int irq_ffs(unsigned int pending) +{ +#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) + return -clz(pending) + 31 - CAUSEB_IP; +#else + unsigned int a0 = 7; + unsigned int t0; + + t0 = s0 & 0xf000; + t0 = t0 < 1; + t0 = t0 << 2; + a0 = a0 - t0; + s0 = s0 << t0; + + t0 = s0 & 0xc000; + t0 = t0 < 1; + t0 = t0 << 1; + a0 = a0 - t0; + s0 = s0 << t0; -asmlinkage void sim_hw0_irqdispatch(struct pt_regs *regs) + t0 = s0 & 0x8000; + t0 = t0 < 1; + //t0 = t0 << 2; + a0 = a0 - t0; + //s0 = s0 << t0; + + return a0; +#endif +} + +static inline void sim_hw0_irqdispatch(struct pt_regs *regs) { do_IRQ(2, regs); } -void __init arch_init_irq(void) +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) { - /* Now safe to set the exception vector. */ - set_except_vector(0, simIRQ); + unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; + int irq; + + irq = irq_ffs(pending); + if (irq > 0) + do_IRQ(MIPSCPU_INT_BASE + irq, regs); + else + spurious_interrupt(regs); +} + +void __init arch_init_irq(void) +{ mips_cpu_irq_init(MIPSCPU_INT_BASE); } diff --git a/arch/mips/momentum/jaguar_atx/Makefile b/arch/mips/momentum/jaguar_atx/Makefile index 20bbd3e..67372f3 100644 --- a/arch/mips/momentum/jaguar_atx/Makefile +++ b/arch/mips/momentum/jaguar_atx/Makefile @@ -6,7 +6,7 @@ # unless it's something special (ie not a .c file). # -obj-y += int-handler.o irq.o prom.o reset.o setup.o +obj-y += irq.o prom.o reset.o setup.o obj-$(CONFIG_SERIAL_8250_CONSOLE) += ja-console.o obj-$(CONFIG_REMOTE_DEBUG) += dbg_io.o diff --git a/arch/mips/momentum/jaguar_atx/int-handler.S b/arch/mips/momentum/jaguar_atx/int-handler.S deleted file mode 100644 index 55bc789..0000000 --- a/arch/mips/momentum/jaguar_atx/int-handler.S +++ /dev/null @@ -1,128 +0,0 @@ -/* - * Copyright 2002 Momentum Computer Inc. - * Author: Matthew Dharm <mdharm@momenco.com> - * - * Based on work: - * Copyright 2001 MontaVista Software Inc. - * Author: jsun@mvista.com or jsun@junsun.net - * - * First-level interrupt dispatcher for Jaguar-ATX board. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - -/* - * First level interrupt dispatcher for Ocelot-CS board - */ - .align 5 - NESTED(jaguar_handle_int, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - mfc0 t0, CP0_CAUSE - mfc0 t2, CP0_STATUS - - and t0, t2 - - andi t1, t0, STATUSF_IP0 /* sw0 software interrupt */ - bnez t1, ll_sw0_irq - andi t1, t0, STATUSF_IP1 /* sw1 software interrupt */ - bnez t1, ll_sw1_irq - andi t1, t0, STATUSF_IP2 /* int0 hardware line */ - bnez t1, ll_pcixa_irq - andi t1, t0, STATUSF_IP3 /* int1 hardware line */ - bnez t1, ll_pcixb_irq - andi t1, t0, STATUSF_IP4 /* int2 hardware line */ - bnez t1, ll_pcia_irq - andi t1, t0, STATUSF_IP5 /* int3 hardware line */ - bnez t1, ll_pcib_irq - andi t1, t0, STATUSF_IP6 /* int4 hardware line */ - bnez t1, ll_uart_irq - andi t1, t0, STATUSF_IP7 /* cpu timer */ - bnez t1, ll_cputimer_irq - - nop - nop - - /* now look at extended interrupts */ - mfc0 t0, CP0_CAUSE - cfc0 t1, CP0_S1_INTCONTROL - - /* shift the mask 8 bits left to line up the bits */ - sll t2, t1, 8 - - and t0, t2 - srl t0, t0, 16 - - andi t1, t0, STATUSF_IP8 /* int6 hardware line */ - bnez t1, ll_mv64340_decode_irq - - nop - nop - - .set reorder - - /* wrong alarm or masked ... */ - j spurious_interrupt - nop - END(jaguar_handle_int) - - .align 5 -ll_sw0_irq: - li a0, 0 - move a1, sp - jal do_IRQ - j ret_from_irq -ll_sw1_irq: - li a0, 1 - move a1, sp - jal do_IRQ - j ret_from_irq -ll_pcixa_irq: - li a0, 2 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_pcixb_irq: - li a0, 3 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_pcia_irq: - li a0, 4 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_pcib_irq: - li a0, 5 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_uart_irq: - li a0, 6 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cputimer_irq: - li a0, 7 - move a1, sp - jal ll_timer_interrupt - j ret_from_irq - -ll_mv64340_decode_irq: - move a0, sp - jal ll_mv64340_irq - j ret_from_irq diff --git a/arch/mips/momentum/jaguar_atx/irq.c b/arch/mips/momentum/jaguar_atx/irq.c index 15588f9..ec4032b 100644 --- a/arch/mips/momentum/jaguar_atx/irq.c +++ b/arch/mips/momentum/jaguar_atx/irq.c @@ -10,7 +10,7 @@ * Copyright 2001 MontaVista Software Inc. * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net * - * Copyright (C) 2000, 2001 Ralf Baechle (ralf@gnu.org) + * Copyright (C) 2000, 01, 06 Ralf Baechle (ralf@linux-mips.org) * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the @@ -38,8 +38,37 @@ #include <linux/types.h> #include <asm/irq_cpu.h> #include <asm/mipsregs.h> +#include <asm/time.h> -extern asmlinkage void jaguar_handle_int(void); +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status(); + + if (pending & STATUSF_IP0) + do_IRQ(0, regs); + else if (pending & STATUSF_IP1) + do_IRQ(1, regs); + else if (pending & STATUSF_IP2) + do_IRQ(2, regs); + else if (pending & STATUSF_IP3) + do_IRQ(3, regs); + else if (pending & STATUSF_IP4) + do_IRQ(4, regs); + else if (pending & STATUSF_IP5) + do_IRQ(5, regs); + else if (pending & STATUSF_IP6) + do_IRQ(6, regs); + else if (pending & STATUSF_IP7) + ll_timer_interrupt(7, regs); + else { + /* + * Now look at the extended interrupts + */ + pending = (read_c0_cause() & (read_c0_intcontrol() << 8)) >> 16; + if (pending & STATUSF_IP8) + ll_mv64340_irq(regs); + } +} static struct irqaction cascade_mv64340 = { no_action, SA_INTERRUPT, CPU_MASK_NONE, "MV64340-Cascade", NULL, NULL @@ -53,8 +82,6 @@ void __init arch_init_irq(void) */ clear_c0_status(ST0_IM); - /* Sets the first-level interrupt dispatcher. */ - set_except_vector(0, jaguar_handle_int); mips_cpu_irq_init(0); rm7k_cpu_irq_init(8); diff --git a/arch/mips/momentum/ocelot_3/Makefile b/arch/mips/momentum/ocelot_3/Makefile index aab8fd8..8bcea64d 100644 --- a/arch/mips/momentum/ocelot_3/Makefile +++ b/arch/mips/momentum/ocelot_3/Makefile @@ -5,4 +5,4 @@ # removes any old dependencies. DON'T put your own dependencies here # unless it's something special (ie not a .c file). # -obj-y += int-handler.o irq.o prom.o reset.o setup.o +obj-y += irq.o prom.o reset.o setup.o diff --git a/arch/mips/momentum/ocelot_3/int-handler.S b/arch/mips/momentum/ocelot_3/int-handler.S deleted file mode 100644 index b120726..0000000 --- a/arch/mips/momentum/ocelot_3/int-handler.S +++ /dev/null @@ -1,139 +0,0 @@ -/* - * Copyright 2002 Momentum Computer Inc. - * Author: Matthew Dharm <mdharm@momenco.com> - * - * Copyright 2001 MontaVista Software Inc. - * Author: jsun@mvista.com or jsun@junsun.net - * - * Copyright 2004 PMC-Sierra - * Author: Manish Lachwani (lachwani@pmc-sierra.com) - * - * Copyright (C) 2004 MontaVista Software Inc. - * Author: Manish Lachwani, mlachwani@mvista.com - * - * First-level interrupt dispatcher for Ocelot-3 board. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - -/* - * First level interrupt dispatcher for Ocelot-3 board - */ - .align 5 - NESTED(ocelot3_handle_int, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - - mfc0 t0, CP0_CAUSE - mfc0 t2, CP0_STATUS - - and t0, t2 - - andi t1, t0, STATUSF_IP0 /* sw0 software interrupt (IRQ0) */ - bnez t1, ll_sw0_irq - - andi t1, t0, STATUSF_IP1 /* sw1 software interrupt (IRQ1) */ - bnez t1, ll_sw1_irq - - andi t1, t0, STATUSF_IP2 /* int0 hardware line (IRQ2) */ - bnez t1, ll_pci0slot1_irq - - andi t1, t0, STATUSF_IP3 /* int1 hardware line (IRQ3) */ - bnez t1, ll_pci0slot2_irq - - andi t1, t0, STATUSF_IP4 /* int2 hardware line (IRQ4) */ - bnez t1, ll_pci1slot1_irq - - andi t1, t0, STATUSF_IP5 /* int3 hardware line (IRQ5) */ - bnez t1, ll_pci1slot2_irq - - andi t1, t0, STATUSF_IP6 /* int4 hardware line (IRQ6) */ - bnez t1, ll_uart_irq - - andi t1, t0, STATUSF_IP7 /* cpu timer (IRQ7) */ - bnez t1, ll_cputimer_irq - - /* now look at extended interrupts */ - mfc0 t0, CP0_CAUSE - cfc0 t1, CP0_S1_INTCONTROL - - /* shift the mask 8 bits left to line up the bits */ - sll t2, t1, 8 - - and t0, t2 - srl t0, t0, 16 - - andi t1, t0, STATUSF_IP8 /* int6 hardware line (IRQ9) */ - bnez t1, ll_mv64340_decode_irq - - .set reorder - - /* wrong alarm or masked ... */ - jal spurious_interrupt - nop - j ret_from_irq - nop - END(ocelot3_handle_int) - - .align 5 -ll_sw0_irq: - li a0, 0 /* IRQ 1 */ - move a1, sp - jal do_IRQ - j ret_from_irq -ll_sw1_irq: - li a0, 1 /* IRQ 2 */ - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_pci0slot1_irq: - li a0, 2 /* IRQ 3 */ - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_pci0slot2_irq: - li a0, 3 /* IRQ 4 */ - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_pci1slot1_irq: - li a0, 4 /* IRQ 5 */ - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_pci1slot2_irq: - li a0, 5 /* IRQ 6 */ - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_uart_irq: - li a0, 6 /* IRQ 7 */ - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cputimer_irq: - li a0, 7 /* IRQ 8 */ - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_mv64340_decode_irq: - move a0, sp - jal ll_mv64340_irq - j ret_from_irq - diff --git a/arch/mips/momentum/ocelot_3/irq.c b/arch/mips/momentum/ocelot_3/irq.c index 42464db..87c63c3 100644 --- a/arch/mips/momentum/ocelot_3/irq.c +++ b/arch/mips/momentum/ocelot_3/irq.c @@ -53,8 +53,6 @@ #include <asm/mipsregs.h> #include <asm/system.h> -extern asmlinkage void ocelot3_handle_int(void); - static struct irqaction cascade_mv64340 = { no_action, SA_INTERRUPT, CPU_MASK_NONE, "MV64340-Cascade", NULL, NULL }; @@ -67,9 +65,6 @@ void __init arch_init_irq(void) */ clear_c0_status(ST0_IM | ST0_BEV); - /* Sets the first-level interrupt dispatcher. */ - set_except_vector(0, ocelot3_handle_int); - mips_cpu_irq_init(0); rm7k_cpu_irq_init(8); /* set up the cascading interrupts */ @@ -79,3 +74,36 @@ void __init arch_init_irq(void) set_c0_status(ST0_IM); /* IE in the status register */ } + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status(); + + if (pending & STATUSF_IP0) + do_IRQ(0, regs); + else if (pending & STATUSF_IP1) + do_IRQ(1, regs); + else if (pending & STATUSF_IP2) + do_IRQ(2, regs); + else if (pending & STATUSF_IP3) + do_IRQ(3, regs); + else if (pending & STATUSF_IP4) + do_IRQ(4, regs); + else if (pending & STATUSF_IP5) + do_IRQ(5, regs); + else if (pending & STATUSF_IP6) + do_IRQ(6, regs); + else if (pending & STATUSF_IP7) + do_IRQ(7, regs); + else { + /* + * Now look at the extended interrupts + */ + pending = (read_c0_cause() & (read_c0_intcontrol() << 8)) >> 16; + + if (pending & STATUSF_IP8) + ll_mv64340_irq(regs); + else + spurious_interrupt(regs); + } +} diff --git a/arch/mips/momentum/ocelot_c/Makefile b/arch/mips/momentum/ocelot_c/Makefile index 9124077..94802b4 100644 --- a/arch/mips/momentum/ocelot_c/Makefile +++ b/arch/mips/momentum/ocelot_c/Makefile @@ -2,7 +2,7 @@ # Makefile for Momentum Computer's Ocelot-C and -CS boards. # -obj-y += cpci-irq.o int-handler.o irq.o prom.o reset.o \ +obj-y += cpci-irq.o irq.o prom.o reset.o \ setup.o uart-irq.o obj-$(CONFIG_KGDB) += dbg_io.o diff --git a/arch/mips/momentum/ocelot_c/int-handler.S b/arch/mips/momentum/ocelot_c/int-handler.S deleted file mode 100644 index f778341..0000000 --- a/arch/mips/momentum/ocelot_c/int-handler.S +++ /dev/null @@ -1,103 +0,0 @@ -/* - * Copyright 2002 Momentum Computer Inc. - * Author: Matthew Dharm <mdharm@momenco.com> - * - * Copyright 2001 MontaVista Software Inc. - * Author: jsun@mvista.com or jsun@junsun.net - * - * First-level interrupt dispatcher for Ocelot-CS board. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> -#include "ocelot_c_fpga.h" - -/* - * First level interrupt dispatcher for Ocelot-CS board - */ - .align 5 - NESTED(ocelot_handle_int, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - mfc0 t0, CP0_CAUSE - mfc0 t2, CP0_STATUS - - and t0, t2 - - andi t1, t0, STATUSF_IP0 /* sw0 software interrupt */ - bnez t1, ll_sw0_irq - andi t1, t0, STATUSF_IP1 /* sw1 software interrupt */ - bnez t1, ll_sw1_irq - andi t1, t0, STATUSF_IP2 /* int0 hardware line */ - bnez t1, ll_scsi_irq - andi t1, t0, STATUSF_IP3 /* int1 hardware line */ - bnez t1, ll_uart_decode_irq - andi t1, t0, STATUSF_IP4 /* int2 hardware line */ - bnez t1, ll_pmc_irq - andi t1, t0, STATUSF_IP5 /* int3 hardware line */ - bnez t1, ll_cpci_decode_irq - andi t1, t0, STATUSF_IP6 /* int4 hardware line */ - bnez t1, ll_mv64340_decode_irq - andi t1, t0, STATUSF_IP7 /* cpu timer */ - bnez t1, ll_cputimer_irq - - .set reorder - - /* wrong alarm or masked ... */ - jal spurious_interrupt - nop - j ret_from_irq - END(ocelot_handle_int) - - .align 5 -ll_sw0_irq: - li a0, 0 - move a1, sp - jal do_IRQ - j ret_from_irq -ll_sw1_irq: - li a0, 1 - move a1, sp - jal do_IRQ - j ret_from_irq -ll_scsi_irq: - li a0, 2 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_uart_decode_irq: - move a0, sp - jal ll_uart_irq - j ret_from_irq - -ll_pmc_irq: - li a0, 4 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpci_decode_irq: - move a0, sp - jal ll_cpci_irq - j ret_from_irq - -ll_mv64340_decode_irq: - move a0, sp - jal ll_mv64340_irq - j ret_from_irq - -ll_cputimer_irq: - li a0, 7 - move a1, sp - jal do_IRQ - j ret_from_irq - diff --git a/arch/mips/momentum/ocelot_c/irq.c b/arch/mips/momentum/ocelot_c/irq.c index a5764bc2..86f61ce 100644 --- a/arch/mips/momentum/ocelot_c/irq.c +++ b/arch/mips/momentum/ocelot_c/irq.c @@ -48,7 +48,6 @@ #include <asm/mipsregs.h> #include <asm/system.h> -extern asmlinkage void ocelot_handle_int(void); extern void uart_irq_init(void); extern void cpci_irq_init(void); @@ -60,6 +59,33 @@ static struct irqaction cascade_mv64340 = { no_action, SA_INTERRUPT, CPU_MASK_NONE, "cascade via MV64340", NULL, NULL }; +extern void ll_uart_irq(struct pt_regs *regs); +extern void ll_cpci_irq(struct pt_regs *regs); + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status(); + + if (pending & STATUSF_IP0) + do_IRQ(0, regs); + else if (pending & STATUSF_IP1) + do_IRQ(1, regs); + else if (pending & STATUSF_IP2) + do_IRQ(2, regs); + else if (pending & STATUSF_IP3) + ll_uart_irq(regs); + else if (pending & STATUSF_IP4) + do_IRQ(4, regs); + else if (pending & STATUSF_IP5) + ll_cpci_irq(regs); + else if (pending & STATUSF_IP6) + ll_mv64340_irq(regs); + else if (pending & STATUSF_IP7) + do_IRQ(7, regs); + else + spurious_interrupt(regs); +} + void __init arch_init_irq(void) { /* @@ -68,8 +94,6 @@ void __init arch_init_irq(void) */ clear_c0_status(ST0_IM); - /* Sets the first-level interrupt dispatcher. */ - set_except_vector(0, ocelot_handle_int); mips_cpu_irq_init(0); /* set up the cascading interrupts */ diff --git a/arch/mips/momentum/ocelot_g/Makefile b/arch/mips/momentum/ocelot_g/Makefile index e5f1cb0..adb5665 100644 --- a/arch/mips/momentum/ocelot_g/Makefile +++ b/arch/mips/momentum/ocelot_g/Makefile @@ -2,7 +2,7 @@ # Makefile for Momentum Computer's Ocelot-G board. # -obj-y += int-handler.o irq.o gt-irq.o prom.o reset.o setup.o +obj-y += irq.o gt-irq.o prom.o reset.o setup.o obj-$(CONFIG_KGDB) += dbg_io.o EXTRA_AFLAGS := $(CFLAGS) diff --git a/arch/mips/momentum/ocelot_g/int-handler.S b/arch/mips/momentum/ocelot_g/int-handler.S deleted file mode 100644 index 772e8f7..0000000 --- a/arch/mips/momentum/ocelot_g/int-handler.S +++ /dev/null @@ -1,131 +0,0 @@ -/* - * Copyright 2001 MontaVista Software Inc. - * Author: jsun@mvista.com or jsun@junsun.net - * - * First-level interrupt dispatcher for ocelot board. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - -/* - * first level interrupt dispatcher for ocelot board - - * We check for the timer first, then check PCI ints A and D. - * Then check for serial IRQ and fall through. - */ - .align 5 - NESTED(ocelot_handle_int, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - mfc0 t0, CP0_CAUSE - mfc0 t2, CP0_STATUS - - and t0, t2 - - andi t1, t0, STATUSF_IP2 /* int0 hardware line */ - bnez t1, ll_pri_enet_irq - andi t1, t0, STATUSF_IP3 /* int1 hardware line */ - bnez t1, ll_sec_enet_irq - andi t1, t0, STATUSF_IP4 /* int2 hardware line */ - bnez t1, ll_uart_irq - andi t1, t0, STATUSF_IP5 /* int3 hardware line */ - bnez t1, ll_cpci_irq - andi t1, t0, STATUSF_IP6 /* int4 hardware line */ - bnez t1, ll_galileo_p0_irq - andi t1, t0, STATUSF_IP7 /* cpu timer */ - bnez t1, ll_cputimer_irq - - /* now look at the extended interrupts */ - mfc0 t0, CP0_CAUSE - cfc0 t1, CP0_S1_INTCONTROL - - /* shift the mask 8 bits left to line up the bits */ - sll t2, t1, 8 - - and t0, t2 - srl t0, t0, 16 - - andi t1, t0, STATUSF_IP8 /* int6 hardware line */ - bnez t1, ll_galileo_p1_irq - andi t1, t0, STATUSF_IP9 /* int7 hardware line */ - bnez t1, ll_pmc_irq - andi t1, t0, STATUSF_IP10 /* int8 hardware line */ - bnez t1, ll_cpci_abcd_irq - andi t1, t0, STATUSF_IP11 /* int9 hardware line */ - bnez t1, ll_testpoint_irq - - .set reorder - - /* wrong alarm or masked ... */ - j spurious_interrupt - nop - END(ocelot_handle_int) - - .align 5 -ll_pri_enet_irq: - li a0, 2 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_sec_enet_irq: - li a0, 3 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_uart_irq: - li a0, 4 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpci_irq: - li a0, 5 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_galileo_p0_irq: - li a0, 6 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cputimer_irq: - li a0, 7 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_galileo_p1_irq: - li a0, 8 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_pmc_irq: - li a0, 9 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpci_abcd_irq: - li a0, 10 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_testpoint_irq: - li a0, 11 - move a1, sp - jal do_IRQ - j ret_from_irq diff --git a/arch/mips/momentum/ocelot_g/irq.c b/arch/mips/momentum/ocelot_g/irq.c index 5eb85b1..7a4a419 100644 --- a/arch/mips/momentum/ocelot_g/irq.c +++ b/arch/mips/momentum/ocelot_g/irq.c @@ -48,7 +48,41 @@ #include <asm/mipsregs.h> #include <asm/system.h> -extern asmlinkage void ocelot_handle_int(void); +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status(); + + if (pending & STATUSF_IP2) + do_IRQ(2, regs); + else if (pending & STATUSF_IP3) + do_IRQ(3, regs); + else if (pending & STATUSF_IP4) + do_IRQ(4, regs); + else if (pending & STATUSF_IP5) + do_IRQ(5, regs); + else if (pending & STATUSF_IP6) + do_IRQ(6, regs); + else if (pending & STATUSF_IP7) + do_IRQ(7, regs); + else { + /* + * Now look at the extended interrupts + */ + pending = (read_c0_cause() & (read_c0_intcontrol() << 8)) >> 16; + + if (pending & STATUSF_IP8) + do_IRQ(8, regs); + else if (pending & STATUSF_IP9) + do_IRQ(9, regs); + else if (pending & STATUSF_IP10) + do_IRQ(10, regs); + else if (pending & STATUSF_IP11) + do_IRQ(11, regs); + else + spurious_interrupt(regs); + } +} + extern void gt64240_irq_init(void); void __init arch_init_irq(void) @@ -60,8 +94,6 @@ void __init arch_init_irq(void) clear_c0_status(ST0_IM); local_irq_disable(); - /* Sets the first-level interrupt dispatcher. */ - set_except_vector(0, ocelot_handle_int); mips_cpu_irq_init(0); rm7k_cpu_irq_init(8); diff --git a/arch/mips/philips/pnx8550/common/Makefile b/arch/mips/philips/pnx8550/common/Makefile index 6e38f3b..b7c6381 100644 --- a/arch/mips/philips/pnx8550/common/Makefile +++ b/arch/mips/philips/pnx8550/common/Makefile @@ -22,6 +22,6 @@ # under Linux. # -obj-y := setup.o prom.o mipsIRQ.o int.o reset.o time.o proc.o platform.o +obj-y := setup.o prom.o int.o reset.o time.o proc.o platform.o obj-$(CONFIG_PCI) += pci.o obj-$(CONFIG_KGDB) += gdb_hook.o diff --git a/arch/mips/philips/pnx8550/common/int.c b/arch/mips/philips/pnx8550/common/int.c index c500e2d..39ee631 100644 --- a/arch/mips/philips/pnx8550/common/int.c +++ b/arch/mips/philips/pnx8550/common/int.c @@ -38,8 +38,6 @@ #include <int.h> #include <uart.h> -extern asmlinkage void cp0_irqdispatch(void); - static DEFINE_SPINLOCK(irq_lock); /* default prio for interrupts */ @@ -55,7 +53,7 @@ static char gic_prio[PNX8550_INT_GIC_TOTINT] = { 1 // 70 }; -void hw0_irqdispatch(int irq, struct pt_regs *regs) +static void hw0_irqdispatch(int irq, struct pt_regs *regs) { /* find out which interrupt */ irq = PNX8550_GIC_VECTOR_0 >> 3; @@ -68,7 +66,7 @@ void hw0_irqdispatch(int irq, struct pt_regs *regs) } -void timer_irqdispatch(int irq, struct pt_regs *regs) +static void timer_irqdispatch(int irq, struct pt_regs *regs) { irq = (0x01c0 & read_c0_config7()) >> 6; @@ -88,6 +86,20 @@ void timer_irqdispatch(int irq, struct pt_regs *regs) } } +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_status() & read_c0_cause(); + + if (pending & STATUSF_IP2) + do_IRQ(2, regs); + else if (pending & STATUSF_IP7) { + if (read_c0_config7() & 0x01c0) + timer_irqdispatch(7, regs); + } + + spurious_interrupt(regs); +} + static inline void modify_cp0_intmask(unsigned clr_mask, unsigned set_mask) { unsigned long status = read_c0_status(); @@ -223,9 +235,6 @@ void __init arch_init_irq(void) int i; int configPR; - /* init of cp0 interrupts */ - set_except_vector(0, cp0_irqdispatch); - for (i = 0; i < PNX8550_INT_CP0_TOTINT; i++) { irq_desc[i].handler = &level_irq_type; pnx8550_ack(i); /* mask the irq just in case */ diff --git a/arch/mips/philips/pnx8550/common/mipsIRQ.S b/arch/mips/philips/pnx8550/common/mipsIRQ.S deleted file mode 100644 index e049a71..0000000 --- a/arch/mips/philips/pnx8550/common/mipsIRQ.S +++ /dev/null @@ -1,77 +0,0 @@ -/* - * Copyright (c) 2002 Philips, Inc. All rights. - * Copyright (c) 2002 Red Hat, Inc. All rights. - * - * This software may be freely redistributed under the terms of the - * GNU General Public License. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * Based upon arch/mips/galileo-boards/ev64240/int-handler.S - * - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - -/* - * cp0_irqdispatch - * - * Code to handle in-core interrupt exception. - */ - - .align 5 - .set reorder - .set noat - NESTED(cp0_irqdispatch, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - mfc0 t0,CP0_CAUSE - mfc0 t2,CP0_STATUS - - and t0,t2 - - andi t1,t0,STATUSF_IP2 /* int0 hardware line */ - bnez t1,ll_hw0_irq - nop - - andi t1,t0,STATUSF_IP7 /* int5 hardware line */ - bnez t1,ll_timer_irq - nop - - /* wrong alarm or masked ... */ - - jal spurious_interrupt - nop - j ret_from_irq - END(cp0_irqdispatch) - - .align 5 - .set reorder -ll_hw0_irq: - li a0,2 - move a1,sp - jal hw0_irqdispatch - nop - j ret_from_irq - nop - - .align 5 - .set reorder -ll_timer_irq: - mfc0 t3,CP0_CONFIG,7 - andi t4,t3,0x01c0 - beqz t4,ll_timer_out - nop - li a0,7 - move a1,sp - jal timer_irqdispatch - nop - -ll_timer_out: j ret_from_irq - nop diff --git a/arch/mips/pmc-sierra/yosemite/Makefile b/arch/mips/pmc-sierra/yosemite/Makefile index ae96a71..e931e0d 100644 --- a/arch/mips/pmc-sierra/yosemite/Makefile +++ b/arch/mips/pmc-sierra/yosemite/Makefile @@ -2,7 +2,7 @@ # Makefile for the PMC-Sierra Titan # -obj-y += irq-handler.o irq.o i2c-yosemite.o prom.o py-console.o setup.o +obj-y += irq.o i2c-yosemite.o prom.o py-console.o setup.o obj-$(CONFIG_KGDB) += dbg_io.o obj-$(CONFIG_SMP) += smp.o diff --git a/arch/mips/pmc-sierra/yosemite/irq-handler.S b/arch/mips/pmc-sierra/yosemite/irq-handler.S deleted file mode 100644 index 33b9c40..0000000 --- a/arch/mips/pmc-sierra/yosemite/irq-handler.S +++ /dev/null @@ -1,93 +0,0 @@ -/* - * Copyright 2003, 04 PMC-Sierra Inc. - * Author: Manish Lachwani (lachwani@pmc-sierra.com - * Copyright 2004 Ralf Baechle (ralf@linux-mips.org) - * - * First-level interrupt router for the PMC-Sierra Titan board - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * Titan supports Hypertransport or PCI but not both. Hence, one interrupt - * line is shared between the PCI slot A and Hypertransport. This is the - * Processor INTB #0. - */ - -#include <linux/config.h> -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - - .align 5 - NESTED(titan_handle_int, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - .set noreorder - la ra, ret_from_irq - mfc0 t0, CP0_CAUSE - mfc0 t2, CP0_STATUS - - and t0, t2 - - andi t2, t0, STATUSF_IP7 /* INTB5 hardware line */ - bnez t2, ll_timer_irq /* Timer */ - andi t1, t0, STATUSF_IP2 /* INTB0 hardware line */ - bnez t1, ll_pcia_irq /* 64-bit PCI */ - andi t2, t0, STATUSF_IP3 /* INTB1 hardware line */ - bnez t2, ll_pcib_irq /* second 64-bit PCI slot */ - andi t1, t0, STATUSF_IP4 /* INTB2 hardware line */ - bnez t1, ll_duart_irq /* UART */ - andi t2, t0, STATUSF_IP5 /* SMP inter-core interrupts */ - bnez t2, ll_smp_irq - andi t1, t0, STATUSF_IP6 - bnez t1, ll_ht_irq /* Hypertransport */ - - move a0, sp - j do_extended_irq - END(titan_handle_int) - - .set reorder - .align 5 - -ll_pcia_irq: - li a0, 2 - move a1, sp -#ifdef CONFIG_HYPERTRANSPORT - j ll_ht_smp_irq_handler -#else - j do_IRQ -#endif - -ll_pcib_irq: - li a0, 3 - move a1, sp - j do_IRQ - -ll_duart_irq: - li a0, 4 - move a1, sp - j do_IRQ - -ll_smp_irq: - li a0, 5 - move a1, sp -#ifdef CONFIG_SMP - j titan_mailbox_irq -#else - j do_IRQ -#endif - -ll_ht_irq: - li a0, 6 - move a1, sp - j ll_ht_smp_irq_handler - -ll_timer_irq: - li a0, 7 - move a1, sp - j do_IRQ diff --git a/arch/mips/pmc-sierra/yosemite/irq.c b/arch/mips/pmc-sierra/yosemite/irq.c index f4e2897..a1f524f 100644 --- a/arch/mips/pmc-sierra/yosemite/irq.c +++ b/arch/mips/pmc-sierra/yosemite/irq.c @@ -2,6 +2,8 @@ * Copyright (C) 2003 PMC-Sierra Inc. * Author: Manish Lachwani (lachwani@pmc-sierra.com) * + * Copyright (C) 2006 Ralf Baechle (ralf@linux-mips.org) + * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your @@ -55,7 +57,6 @@ #define HYPERTRANSPORT_INTC 0x7a /* INTC# */ #define HYPERTRANSPORT_INTD 0x7b /* INTD# */ -extern asmlinkage void titan_handle_int(void); extern void jaguar_mailbox_irq(struct pt_regs *); /* @@ -125,6 +126,35 @@ asmlinkage void do_extended_irq(struct pt_regs *regs) } +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int cause = read_c0_cause(); + unsigned int status = read_c0_status(); + unsigned int pending = cause & status; + + if (pending & STATUSF_IP7) { + do_IRQ(7, regs); + } else if (pending & STATUSF_IP2) { +#ifdef CONFIG_HYPERTRANSPORT + ll_ht_smp_irq_handler(2, regs); +#else + do_IRQ(2, regs); +#endif + } else if (pending & STATUSF_IP3) { + do_IRQ(3, regs); + } else if (pending & STATUSF_IP4) { + do_IRQ(4, regs); + } else if (pending & STATUSF_IP5) { +#ifdef CONFIG_SMP + titan_mailbox_irq(regs); +#else + do_IRQ(5, regs); +#endif + } else if (pending & STATUSF_IP6) { + do_IRQ(4, regs); + } +} + #ifdef CONFIG_KGDB extern void init_second_port(void); #endif @@ -136,7 +166,6 @@ void __init arch_init_irq(void) { clear_c0_status(ST0_IM); - set_except_vector(0, titan_handle_int); mips_cpu_irq_init(0); rm7k_cpu_irq_init(8); rm9k_cpu_irq_init(12); diff --git a/arch/mips/qemu/Makefile b/arch/mips/qemu/Makefile index 6a8e8bc..730f459 100644 --- a/arch/mips/qemu/Makefile +++ b/arch/mips/qemu/Makefile @@ -2,6 +2,6 @@ # Makefile for Qemu specific kernel interface routines under Linux. # -obj-y = q-firmware.o q-int.o q-irq.o q-mem.o q-setup.o +obj-y = q-firmware.o q-irq.o q-mem.o q-setup.o obj-$(CONFIG_SMP) += q-smp.o diff --git a/arch/mips/qemu/q-int.S b/arch/mips/qemu/q-int.S deleted file mode 100644 index 6e3dfe5..0000000 --- a/arch/mips/qemu/q-int.S +++ /dev/null @@ -1,17 +0,0 @@ -/* - * Qemu interrupt handler code. - * - * Copyright (C) 2005 by Ralf Baechle - */ -#include <asm/asm.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - - .align 5 - NESTED(qemu_handle_int, PT_SIZE, sp) - SAVE_ALL - CLI - move a0, sp - PTR_LA ra, ret_from_irq - j do_qemu_int - END(qemu_handle_int) diff --git a/arch/mips/qemu/q-irq.c b/arch/mips/qemu/q-irq.c index 2c4e070..3352374 100644 --- a/arch/mips/qemu/q-irq.c +++ b/arch/mips/qemu/q-irq.c @@ -9,7 +9,7 @@ extern asmlinkage void qemu_handle_int(void); -asmlinkage void do_qemu_int(struct pt_regs *regs) +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) { unsigned int pending = read_c0_status() & read_c0_cause(); @@ -29,7 +29,6 @@ asmlinkage void do_qemu_int(struct pt_regs *regs) void __init arch_init_irq(void) { - set_except_vector(0, qemu_handle_int); mips_hpt_frequency = QEMU_C0_COUNTER_CLOCK; /* 100MHz */ init_i8259_irqs(); diff --git a/arch/mips/sgi-ip22/Makefile b/arch/mips/sgi-ip22/Makefile index eb0820f..6aa4c0c 100644 --- a/arch/mips/sgi-ip22/Makefile +++ b/arch/mips/sgi-ip22/Makefile @@ -3,7 +3,7 @@ # under Linux. # -obj-y += ip22-mc.o ip22-hpc.o ip22-int.o ip22-irq.o ip22-berr.o \ +obj-y += ip22-mc.o ip22-hpc.o ip22-int.o ip22-berr.o \ ip22-time.o ip22-nvram.o ip22-reset.o ip22-setup.o obj-$(CONFIG_EISA) += ip22-eisa.o diff --git a/arch/mips/sgi-ip22/ip22-int.c b/arch/mips/sgi-ip22/ip22-int.c index d16fb43..fc6a7e2 100644 --- a/arch/mips/sgi-ip22/ip22-int.c +++ b/arch/mips/sgi-ip22/ip22-int.c @@ -37,7 +37,6 @@ static char lc1msk_to_irqnr[256]; static char lc2msk_to_irqnr[256]; static char lc3msk_to_irqnr[256]; -extern asmlinkage void indyIRQ(void); extern int ip22_eisa_init(void); static void enable_local0_irq(unsigned int irq) @@ -224,7 +223,7 @@ static struct hw_interrupt_type ip22_local3_irq_type = { .end = end_local3_irq, }; -void indy_local0_irqdispatch(struct pt_regs *regs) +static void indy_local0_irqdispatch(struct pt_regs *regs) { u8 mask = sgint->istat0 & sgint->imask0; u8 mask2; @@ -242,7 +241,7 @@ void indy_local0_irqdispatch(struct pt_regs *regs) return; } -void indy_local1_irqdispatch(struct pt_regs *regs) +static void indy_local1_irqdispatch(struct pt_regs *regs) { u8 mask = sgint->istat1 & sgint->imask1; u8 mask2; @@ -262,7 +261,7 @@ void indy_local1_irqdispatch(struct pt_regs *regs) extern void ip22_be_interrupt(int irq, struct pt_regs *regs); -void indy_buserror_irq(struct pt_regs *regs) +static void indy_buserror_irq(struct pt_regs *regs) { int irq = SGI_BUSERR_IRQ; @@ -307,6 +306,56 @@ static struct irqaction map1_cascade = { #define SGI_INTERRUPTS SGINT_LOCAL3 #endif +extern void indy_r4k_timer_interrupt(struct pt_regs *regs); +extern void indy_8254timer_irq(struct pt_regs *regs); + +/* + * IRQs on the INDY look basically (barring software IRQs which we don't use + * at all) like: + * + * MIPS IRQ Source + * -------- ------ + * 0 Software (ignored) + * 1 Software (ignored) + * 2 Local IRQ level zero + * 3 Local IRQ level one + * 4 8254 Timer zero + * 5 8254 Timer one + * 6 Bus Error + * 7 R4k timer (what we use) + * + * We handle the IRQ according to _our_ priority which is: + * + * Highest ---- R4k Timer + * Local IRQ zero + * Local IRQ one + * Bus Error + * 8254 Timer zero + * Lowest ---- 8254 Timer one + * + * then we just return, if multiple IRQs are pending then we will just take + * another exception, big deal. + */ + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause(); + + /* + * First we check for r4k counter/timer IRQ. + */ + if (pending & CAUSEF_IP7) + indy_r4k_timer_interrupt(regs); + else if (pending & CAUSEF_IP2) + indy_local0_irqdispatch(regs); + else if (pending & CAUSEF_IP3) + indy_local1_irqdispatch(regs); + else if (pending & CAUSEF_IP6) + indy_buserror_irq(regs); + else if (pending & (CAUSEF_IP4 | CAUSEF_IP5)) + indy_8254timer_irq(regs); +} + extern void mips_cpu_irq_init(unsigned int irq_base); void __init arch_init_irq(void) @@ -369,8 +418,6 @@ void __init arch_init_irq(void) sgint->cmeimask0 = 0; sgint->cmeimask1 = 0; - set_except_vector(0, indyIRQ); - /* init CPU irqs */ mips_cpu_irq_init(SGINT_CPU); diff --git a/arch/mips/sgi-ip22/ip22-irq.S b/arch/mips/sgi-ip22/ip22-irq.S deleted file mode 100644 index 6ccbd9e1..0000000 --- a/arch/mips/sgi-ip22/ip22-irq.S +++ /dev/null @@ -1,118 +0,0 @@ -/* - * ip22-irq.S: Interrupt exception dispatch code for FullHouse and - * Guiness. - * - * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com) - */ - -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - -/* A lot of complication here is taken away because: - * - * 1) We handle one interrupt and return, sitting in a loop and moving across - * all the pending IRQ bits in the cause register is _NOT_ the answer, the - * common case is one pending IRQ so optimize in that direction. - * - * 2) We need not check against bits in the status register IRQ mask, that - * would make this routine slow as hell. - * - * 3) Linux only thinks in terms of all IRQs on or all IRQs off, nothing in - * between like BSD spl() brain-damage. - * - * Furthermore, the IRQs on the INDY look basically (barring software IRQs - * which we don't use at all) like: - * - * MIPS IRQ Source - * -------- ------ - * 0 Software (ignored) - * 1 Software (ignored) - * 2 Local IRQ level zero - * 3 Local IRQ level one - * 4 8254 Timer zero - * 5 8254 Timer one - * 6 Bus Error - * 7 R4k timer (what we use) - * - * We handle the IRQ according to _our_ priority which is: - * - * Highest ---- R4k Timer - * Local IRQ zero - * Local IRQ one - * Bus Error - * 8254 Timer zero - * Lowest ---- 8254 Timer one - * - * then we just return, if multiple IRQs are pending then we will just take - * another exception, big deal. - */ - - .text - .set noreorder - .set noat - .align 5 - NESTED(indyIRQ, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - mfc0 s0, CP0_CAUSE # get irq mask - - /* First we check for r4k counter/timer IRQ. */ - andi a0, s0, CAUSEF_IP7 - beq a0, zero, 1f - andi a0, s0, CAUSEF_IP2 # delay slot, check local level zero - - /* Wheee, a timer interrupt. */ - jal indy_r4k_timer_interrupt - move a0, sp # delay slot - j ret_from_irq - nop # delay slot - -1: - beq a0, zero, 1f - andi a0, s0, CAUSEF_IP3 # delay slot, check local level one - - /* Wheee, local level zero interrupt. */ - jal indy_local0_irqdispatch - move a0, sp # delay slot - - j ret_from_irq - nop # delay slot - -1: - beq a0, zero, 1f - andi a0, s0, CAUSEF_IP6 # delay slot, check bus error - - /* Wheee, local level one interrupt. */ - jal indy_local1_irqdispatch - move a0, sp # delay slot - j ret_from_irq - nop # delay slot - -1: - beq a0, zero, 1f - andi a0, s0, (CAUSEF_IP4 | CAUSEF_IP5) # delay slot - - /* Wheee, an asynchronous bus error... */ - jal indy_buserror_irq - move a0, sp # delay slot - j ret_from_irq - nop # delay slot - -1: - /* Here by mistake? It is possible, that by the time we take - * the exception the IRQ pin goes low, so just leave if this - * is the case. - */ - beq a0, zero, 1f - nop # delay slot - - /* Must be one of the 8254 timers... */ - jal indy_8254timer_irq - move a0, sp # delay slot -1: - j ret_from_irq - nop # delay slot - END(indyIRQ) diff --git a/arch/mips/sgi-ip27/Makefile b/arch/mips/sgi-ip27/Makefile index 4ba3407..686ba14 100644 --- a/arch/mips/sgi-ip27/Makefile +++ b/arch/mips/sgi-ip27/Makefile @@ -2,7 +2,7 @@ # Makefile for the IP27 specific kernel interface routines under Linux. # -obj-y := ip27-berr.o ip27-console.o ip27-irq.o ip27-init.o ip27-irq-glue.o \ +obj-y := ip27-berr.o ip27-console.o ip27-irq.o ip27-init.o \ ip27-klconfig.o ip27-klnuma.o ip27-memory.o ip27-nmi.o ip27-reset.o \ ip27-timer.o ip27-hubio.o ip27-xtalk.o diff --git a/arch/mips/sgi-ip27/TODO b/arch/mips/sgi-ip27/TODO index 3210613..19f1512 100644 --- a/arch/mips/sgi-ip27/TODO +++ b/arch/mips/sgi-ip27/TODO @@ -9,10 +9,6 @@ ip27-init.c:find_lbaord_real. DONE in irix? 6. Investigate why things do not work without the setup_test() call being invoked on all nodes in ip27-memory.c. -7. Too many CLIs in the locore handlers : -For the low level handlers set up by set_except_vector(), -__tlb_refill_debug_tramp, __xtlb_refill_debug_tramp and cacheerror, -investigate whether the code should do CLI, STI or KMODE. 8. Too many do_page_faults invoked - investigate. 9. start_thread must turn off UX64 ... and define tlb_refill_debug. 10. Need a bad pmd table, bad pte table. __bad_pmd_table/__bad_pagetable diff --git a/arch/mips/sgi-ip27/ip27-irq-glue.S b/arch/mips/sgi-ip27/ip27-irq-glue.S deleted file mode 100644 index c304df7..0000000 --- a/arch/mips/sgi-ip27/ip27-irq-glue.S +++ /dev/null @@ -1,45 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 1999 Ralf Baechle - * Copyright (C) 1999 Silicon Graphics, Inc. - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> - - .text - .align 5 -NESTED(ip27_irq, PT_SIZE, sp) - SAVE_ALL - CLI - - mfc0 s0, CP0_CAUSE - mfc0 t0, CP0_STATUS - and s0, t0 - move a0, sp - PTR_LA ra, ret_from_irq - - /* First check for RT interrupt. */ - andi t0, s0, CAUSEF_IP4 - bnez t0, ip4 - andi t0, s0, CAUSEF_IP2 - bnez t0, ip2 - andi t0, s0, CAUSEF_IP3 - bnez t0, ip3 - andi t0, s0, CAUSEF_IP5 - bnez t0, ip5 - andi t0, s0, CAUSEF_IP6 - bnez t0, ip6 - j ra - -ip2: j ip27_do_irq_mask0 # PI_INT_PEND_0 or CC_PEND_{A|B} -ip3: j ip27_do_irq_mask1 # PI_INT_PEND_1 -ip4: j ip27_rt_timer_interrupt -ip5: j ip27_prof_timer -ip6: j ip27_hub_error - - END(ip27_irq) diff --git a/arch/mips/sgi-ip27/ip27-irq.c b/arch/mips/sgi-ip27/ip27-irq.c index 2854ac4..2e643d2 100644 --- a/arch/mips/sgi-ip27/ip27-irq.c +++ b/arch/mips/sgi-ip27/ip27-irq.c @@ -130,7 +130,7 @@ static int ms1bit(unsigned long x) * Kanoj 05.13.00 */ -void ip27_do_irq_mask0(struct pt_regs *regs) +static void ip27_do_irq_mask0(struct pt_regs *regs) { int irq, swlevel; hubreg_t pend0, mask0; @@ -171,7 +171,7 @@ void ip27_do_irq_mask0(struct pt_regs *regs) LOCAL_HUB_L(PI_INT_PEND0); } -void ip27_do_irq_mask1(struct pt_regs *regs) +static void ip27_do_irq_mask1(struct pt_regs *regs) { int irq, swlevel; hubreg_t pend1, mask1; @@ -196,12 +196,12 @@ void ip27_do_irq_mask1(struct pt_regs *regs) LOCAL_HUB_L(PI_INT_PEND1); } -void ip27_prof_timer(struct pt_regs *regs) +static void ip27_prof_timer(struct pt_regs *regs) { panic("CPU %d got a profiling interrupt", smp_processor_id()); } -void ip27_hub_error(struct pt_regs *regs) +static void ip27_hub_error(struct pt_regs *regs) { panic("CPU %d got a hub error interrupt", smp_processor_id()); } @@ -421,9 +421,26 @@ int __devinit request_bridge_irq(struct bridge_controller *bc) return irq; } +extern void ip27_rt_timer_interrupt(struct pt_regs *regs); + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned long pending = read_c0_cause() & read_c0_status(); + + if (pending & CAUSEF_IP4) + ip27_rt_timer_interrupt(regs); + else if (pending & CAUSEF_IP2) /* PI_INT_PEND_0 or CC_PEND_{A|B} */ + ip27_do_irq_mask0(regs); + else if (pending & CAUSEF_IP3) /* PI_INT_PEND_1 */ + ip27_do_irq_mask1(regs); + else if (pending & CAUSEF_IP5) + ip27_prof_timer(regs); + else if (pending & CAUSEF_IP6) + ip27_hub_error(regs); +} + void __init arch_init_irq(void) { - set_except_vector(0, ip27_irq); } void install_ipi(void) diff --git a/arch/mips/sgi-ip32/Makefile b/arch/mips/sgi-ip32/Makefile index 470898f..530bf84 100644 --- a/arch/mips/sgi-ip32/Makefile +++ b/arch/mips/sgi-ip32/Makefile @@ -3,7 +3,7 @@ # under Linux. # -obj-y += ip32-berr.o ip32-irq.o ip32-irq-glue.o ip32-setup.o ip32-reset.o \ +obj-y += ip32-berr.o ip32-irq.o ip32-setup.o ip32-reset.o \ crime.o ip32-memory.o EXTRA_AFLAGS := $(CFLAGS) diff --git a/arch/mips/sgi-ip32/ip32-irq-glue.S b/arch/mips/sgi-ip32/ip32-irq-glue.S deleted file mode 100644 index 200924e..0000000 --- a/arch/mips/sgi-ip32/ip32-irq-glue.S +++ /dev/null @@ -1,86 +0,0 @@ -/* - * Low level interrupt handler for the SGI O2 aka IP32 aka Moosehead - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2000 Harald Koerfgen - * Copyright (C) 2001 Keith M Wesolowski - */ -#include <asm/asm.h> -#include <asm/regdef.h> -#include <asm/mipsregs.h> -#include <asm/stackframe.h> -#include <asm/addrspace.h> - - .text - .set noreorder - .set noat - .align 5 - NESTED(ip32_handle_int, PT_SIZE, ra) - .set noat - SAVE_ALL - CLI # TEST: interrupts should be off - .set at - .set noreorder - - mfc0 s0,CP0_CAUSE - - andi t1, s0, IE_IRQ0 - bnez t1, handle_irq0 - andi t1, s0, IE_IRQ1 - bnez t1, handle_irq1 - andi t1, s0, IE_IRQ2 - bnez t1, handle_irq2 - andi t1, s0, IE_IRQ3 - bnez t1, handle_irq3 - andi t1, s0, IE_IRQ4 - bnez t1, handle_irq4 - andi t1, s0, IE_IRQ5 - bnez t1, handle_irq5 - nop - - /* Either someone has triggered the "software interrupts" - * or we lost an interrupt somehow. Ignore it. - */ - j ret_from_irq - nop - -handle_irq0: - jal ip32_irq0 - move a0, sp - j ret_from_irq - nop - -handle_irq1: - jal ip32_irq1 - move a0, sp - j ret_from_irq - nop - -handle_irq2: - jal ip32_irq2 - move a0, sp - j ret_from_irq - nop - -handle_irq3: - jal ip32_irq3 - move a0, sp - j ret_from_irq - nop - -handle_irq4: - jal ip32_irq4 - move a0, sp - j ret_from_irq - nop - -handle_irq5: - jal ip32_irq5 - move a0, sp - j ret_from_irq - nop - - END(ip32_handle_int) diff --git a/arch/mips/sgi-ip32/ip32-irq.c b/arch/mips/sgi-ip32/ip32-irq.c index 2eb22d69..22a6df9 100644 --- a/arch/mips/sgi-ip32/ip32-irq.c +++ b/arch/mips/sgi-ip32/ip32-irq.c @@ -130,8 +130,6 @@ struct irqaction memerr_irq = { crime_memerr_intr, SA_INTERRUPT, struct irqaction cpuerr_irq = { crime_cpuerr_intr, SA_INTERRUPT, CPU_MASK_NONE, "CRIME CPU error", NULL, NULL }; -extern void ip32_handle_int(void); - /* * For interrupts wired from a single device to the CPU. Only the clock * uses this it seems, which is IRQ 0 and IP7. @@ -503,7 +501,7 @@ static void ip32_unknown_interrupt(struct pt_regs *regs) /* CRIME 1.1 appears to deliver all interrupts to this one pin. */ /* change this to loop over all edge-triggered irqs, exception masked out ones */ -void ip32_irq0(struct pt_regs *regs) +static void ip32_irq0(struct pt_regs *regs) { uint64_t crime_int; int irq = 0; @@ -520,31 +518,49 @@ void ip32_irq0(struct pt_regs *regs) do_IRQ(irq, regs); } -void ip32_irq1(struct pt_regs *regs) +static void ip32_irq1(struct pt_regs *regs) { ip32_unknown_interrupt(regs); } -void ip32_irq2(struct pt_regs *regs) +static void ip32_irq2(struct pt_regs *regs) { ip32_unknown_interrupt(regs); } -void ip32_irq3(struct pt_regs *regs) +static void ip32_irq3(struct pt_regs *regs) { ip32_unknown_interrupt(regs); } -void ip32_irq4(struct pt_regs *regs) +static void ip32_irq4(struct pt_regs *regs) { ip32_unknown_interrupt(regs); } -void ip32_irq5(struct pt_regs *regs) +static void ip32_irq5(struct pt_regs *regs) { ll_timer_interrupt(IP32_R4K_TIMER_IRQ, regs); } +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause(); + + if (likely(pending & IE_IRQ0)) + ip32_irq0(regs); + else if (unlikely(pending & IE_IRQ1)) + ip32_irq1(regs); + else if (unlikely(pending & IE_IRQ2)) + ip32_irq2(regs); + else if (unlikely(pending & IE_IRQ3)) + ip32_irq3(regs); + else if (unlikely(pending & IE_IRQ4)) + ip32_irq4(regs); + else if (likely(pending & IE_IRQ5)) + ip32_irq5(regs); +} + void __init arch_init_irq(void) { unsigned int irq; @@ -556,7 +572,6 @@ void __init arch_init_irq(void) crime->soft_int = 0; mace->perif.ctrl.istat = 0; mace->perif.ctrl.imask = 0; - set_except_vector(0, ip32_handle_int); for (irq = 0; irq <= IP32_IRQ_MAX; irq++) { hw_irq_controller *controller; diff --git a/arch/mips/sibyte/bcm1480/Makefile b/arch/mips/sibyte/bcm1480/Makefile index 538d5a5..7b36ff3 100644 --- a/arch/mips/sibyte/bcm1480/Makefile +++ b/arch/mips/sibyte/bcm1480/Makefile @@ -1,4 +1,4 @@ -obj-y := setup.o irq.o irq_handler.o time.o +obj-y := setup.o irq.o time.o obj-$(CONFIG_SMP) += smp.o diff --git a/arch/mips/sibyte/bcm1480/irq.c b/arch/mips/sibyte/bcm1480/irq.c index 9cf7d71..e61760b 100644 --- a/arch/mips/sibyte/bcm1480/irq.c +++ b/arch/mips/sibyte/bcm1480/irq.c @@ -187,9 +187,6 @@ static void bcm1480_set_affinity(unsigned int irq, cpumask_t mask) #endif -/* Defined in arch/mips/sibyte/bcm1480/irq_handler.S */ -extern void bcm1480_irq_handler(void); - /*****************************************************************************/ static unsigned int startup_bcm1480_irq(unsigned int irq) @@ -422,7 +419,6 @@ void __init arch_init_irq(void) #endif /* Enable necessary IPs, disable the rest */ change_c0_status(ST0_IM, imask); - set_except_vector(0, bcm1480_irq_handler); #ifdef CONFIG_KGDB if (kgdb_flag) { @@ -473,3 +469,76 @@ void bcm1480_kgdb_interrupt(struct pt_regs *regs) } #endif /* CONFIG_KGDB */ + +static inline int dclz(unsigned long long x) +{ + int lz; + + __asm__ ( + " .set push \n" + " .set mips64 \n" + " dclz %0, %1 \n" + " .set pop \n" + : "=r" (lz) + : "r" (x)); + + return lz; +} + +extern void bcm1480_timer_interrupt(struct pt_regs *regs); +extern void bcm1480_mailbox_interrupt(struct pt_regs *regs); +extern void bcm1480_kgdb_interrupt(struct pt_regs *regs); + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending; + +#ifdef CONFIG_SIBYTE_BCM1480_PROF + /* Set compare to count to silence count/compare timer interrupts */ + write_c0_compare(read_c0_count()); +#endif + + pending = read_c0_cause(); + +#ifdef CONFIG_SIBYTE_BCM1480_PROF + if (pending & CAUSEF_IP7) /* Cpu performance counter interrupt */ + sbprof_cpu_intr(exception_epc(regs)); +#endif + + if (pending & CAUSEF_IP4) + bcm1480_timer_interrupt(regs); + +#ifdef CONFIG_SMP + if (pending & CAUSEF_IP3) + bcm1480_mailbox_interrupt(regs); +#endif + +#ifdef CONFIG_KGDB + if (pending & CAUSEF_IP6) + bcm1480_kgdb_interrupt(regs); /* KGDB (uart 1) */ +#endif + + if (pending & CAUSEF_IP2) { + unsigned long long mask_h, mask_l; + unsigned long base; + + /* + * Default...we've hit an IP[2] interrupt, which means we've + * got to check the 1480 interrupt registers to figure out what + * to do. Need to detect which CPU we're on, now that + * smp_affinity is supported. + */ + base = A_BCM1480_IMR_MAPPER(smp_processor_id()); + mask_h = __raw_readq( + IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_H)); + mask_l = __raw_readq( + IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_L)); + + if (!mask_h) { + if (mask_h ^ 1) + do_IRQ(63 - dclz(mask_h), regs); + else + do_IRQ(127 - dclz(mask_l), regs); + } + } +} diff --git a/arch/mips/sibyte/bcm1480/irq_handler.S b/arch/mips/sibyte/bcm1480/irq_handler.S deleted file mode 100644 index 408db88..0000000 --- a/arch/mips/sibyte/bcm1480/irq_handler.S +++ /dev/null @@ -1,165 +0,0 @@ -/* - * Copyright (C) 2000,2001,2002,2003,2004 Broadcom Corporation - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/* - * bcm1480_irq_handler() is the routine that is actually called when an - * interrupt occurs. It is installed as the exception vector handler in - * init_IRQ() in arch/mips/sibyte/bcm1480/irq.c - * - * In the handle we figure out which interrupts need handling, and use that - * to call the dispatcher, which will take care of actually calling - * registered handlers - * - * Note that we take care of all raised interrupts in one go at the handler. - * This is more BSDish than the Indy code, and also, IMHO, more sane. - */ -#include <linux/config.h> - -#include <asm/addrspace.h> -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> -#include <asm/sibyte/sb1250_defs.h> -#include <asm/sibyte/bcm1480_regs.h> -#include <asm/sibyte/bcm1480_int.h> - -/* - * What a pain. We have to be really careful saving the upper 32 bits of any - * register across function calls if we don't want them trashed--since were - * running in -o32, the calling routing never saves the full 64 bits of a - * register across a function call. Being the interrupt handler, we're - * guaranteed that interrupts are disabled during this code so we don't have - * to worry about random interrupts blasting the high 32 bits. - */ - - .text - .set push - .set noreorder - .set noat - .set mips64 - #.set mips4 - .align 5 - NESTED(bcm1480_irq_handler, PT_SIZE, sp) - SAVE_ALL - CLI - -#ifdef CONFIG_SIBYTE_BCM1480_PROF - /* Set compare to count to silence count/compare timer interrupts */ - mfc0 t1, CP0_COUNT - mtc0 t1, CP0_COMPARE /* pause to clear IP[7] bit of cause ? */ -#endif - /* Read cause */ - mfc0 s0, CP0_CAUSE - -#ifdef CONFIG_SIBYTE_BCM1480_PROF - /* Cpu performance counter interrupt is routed to IP[7] */ - andi t1, s0, CAUSEF_IP7 - beqz t1, 0f - srl t1, s0, (CAUSEB_BD-2) /* Shift BD bit to bit 2 */ - and t1, t1, 0x4 /* mask to get just BD bit */ -#ifdef CONFIG_MIPS64 - dmfc0 a0, CP0_EPC - daddu a0, a0, t1 /* a0 = EPC + (BD ? 4 : 0) */ -#else - mfc0 a0, CP0_EPC - addu a0, a0, t1 /* a0 = EPC + (BD ? 4 : 0) */ -#endif - jal sbprof_cpu_intr - nop - j ret_from_irq - nop -0: -#endif - - /* Timer interrupt is routed to IP[4] */ - andi t1, s0, CAUSEF_IP4 - beqz t1, 1f - nop - jal bcm1480_timer_interrupt - move a0, sp /* Pass the registers along */ - j ret_from_irq - nop /* delay slot */ -1: - -#ifdef CONFIG_SMP - /* Mailbox interrupt is routed to IP[3] */ - andi t1, s0, CAUSEF_IP3 - beqz t1, 2f - nop - jal bcm1480_mailbox_interrupt - move a0, sp - j ret_from_irq - nop /* delay slot */ -2: -#endif - -#ifdef CONFIG_KGDB - /* KGDB (uart 1) interrupt is routed to IP[6] */ - andi t1, s0, CAUSEF_IP6 - beqz t1, 3f - nop /* delay slot */ - jal bcm1480_kgdb_interrupt - move a0, sp - j ret_from_irq - nop /* delay slot */ -3: -#endif - - and t1, s0, CAUSEF_IP2 - beqz t1, 9f - nop - - /* - * Default...we've hit an IP[2] interrupt, which means we've got - * to check the 1480 interrupt registers to figure out what to do - * Need to detect which CPU we're on, now that smp_affinity is - * supported. - */ - PTR_LA v0, CKSEG1 + A_BCM1480_IMR_CPU0_BASE -#ifdef CONFIG_SMP - lw t1, TI_CPU($28) - sll t1, t1, BCM1480_IMR_REGISTER_SPACING_SHIFT - addu v0, v0, t1 -#endif - - /* Read IP[2] status (get both high and low halves of status) */ - ld s0, R_BCM1480_IMR_INTERRUPT_STATUS_BASE_H(v0) - ld s1, R_BCM1480_IMR_INTERRUPT_STATUS_BASE_L(v0) - - move s2, zero /* intr number */ - li s3, 64 - - beqz s0, 9f /* No interrupts. Return. */ - move a1, sp - - xori s4, s0, 1 /* if s0 (_H) == 1, it's a low intr, so... */ - movz s2, s3, s4 /* start the intr number at 64, and */ - movz s0, s1, s4 /* look at the low status value. */ - - dclz s1, s0 /* Find the next interrupt. */ - dsubu a0, zero, s1 - daddiu a0, a0, 63 - jal do_IRQ - daddu a0, a0, s2 - -9: j ret_from_irq - nop - - .set pop - END(bcm1480_irq_handler) diff --git a/arch/mips/sibyte/sb1250/Makefile b/arch/mips/sibyte/sb1250/Makefile index a8af846..a2fdbd6 100644 --- a/arch/mips/sibyte/sb1250/Makefile +++ b/arch/mips/sibyte/sb1250/Makefile @@ -1,4 +1,4 @@ -obj-y := setup.o irq.o irq_handler.o time.o +obj-y := setup.o irq.o time.o obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_SIBYTE_TBPROF) += bcm1250_tbprof.o diff --git a/arch/mips/sibyte/sb1250/irq.c b/arch/mips/sibyte/sb1250/irq.c index 589537b..0f6e54d 100644 --- a/arch/mips/sibyte/sb1250/irq.c +++ b/arch/mips/sibyte/sb1250/irq.c @@ -163,10 +163,6 @@ static void sb1250_set_affinity(unsigned int irq, cpumask_t mask) } #endif - -/* Defined in arch/mips/sibyte/sb1250/irq_handler.S */ -extern void sb1250_irq_handler(void); - /*****************************************************************************/ static unsigned int startup_sb1250_irq(unsigned int irq) @@ -379,7 +375,6 @@ void __init arch_init_irq(void) #endif /* Enable necessary IPs, disable the rest */ change_c0_status(ST0_IM, imask); - set_except_vector(0, sb1250_irq_handler); #ifdef CONFIG_KGDB if (kgdb_flag) { @@ -409,7 +404,7 @@ void __init arch_init_irq(void) #define duart_out(reg, val) csr_out32(val, IOADDR(A_DUART_CHANREG(kgdb_port,reg))) #define duart_in(reg) csr_in32(IOADDR(A_DUART_CHANREG(kgdb_port,reg))) -void sb1250_kgdb_interrupt(struct pt_regs *regs) +static void sb1250_kgdb_interrupt(struct pt_regs *regs) { /* * Clear break-change status (allow some time for the remote @@ -424,3 +419,74 @@ void sb1250_kgdb_interrupt(struct pt_regs *regs) } #endif /* CONFIG_KGDB */ + +static inline int dclz(unsigned long long x) +{ + int lz; + + __asm__ ( + " .set push \n" + " .set mips64 \n" + " dclz %0, %1 \n" + " .set pop \n" + : "=r" (lz) + : "r" (x)); + + return lz; +} + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending; + +#ifdef CONFIG_SIBYTE_SB1250_PROF + /* Set compare to count to silence count/compare timer interrupts */ + write_c0_count(read_c0_count()); +#endif + + /* + * What a pain. We have to be really careful saving the upper 32 bits + * of any * register across function calls if we don't want them + * trashed--since were running in -o32, the calling routing never saves + * the full 64 bits of a register across a function call. Being the + * interrupt handler, we're guaranteed that interrupts are disabled + * during this code so we don't have to worry about random interrupts + * blasting the high 32 bits. + */ + + pending = read_c0_cause(); + +#ifdef CONFIG_SIBYTE_SB1250_PROF + if (pending & CAUSEF_IP7) { /* Cpu performance counter interrupt */ + sbprof_cpu_intr(exception_epc(regs)); + } +#endif + + if (pending & CAUSEF_IP4) + sb1250_timer_interrupt(regs); + +#ifdef CONFIG_SMP + if (pending & CAUSEF_IP3) + sb1250_mailbox_interrupt(regs); +#endif + +#ifdef CONFIG_KGDB + if (pending & CAUSEF_IP6) /* KGDB (uart 1) */ + sb1250_kgdb_interrupt(regs); +#endif + + if (pending & CAUSEF_IP2) { + unsigned long long mask; + + /* + * Default...we've hit an IP[2] interrupt, which means we've + * got to check the 1250 interrupt registers to figure out what + * to do. Need to detect which CPU we're on, now that + ~ smp_affinity is supported. + */ + mask = __raw_readq(IOADDR(A_IMR_REGISTER(smp_processor_id(), + R_IMR_INTERRUPT_STATUS_BASE))); + if (mask) + do_IRQ(63 - dclz(mask), regs); + } +} diff --git a/arch/mips/sibyte/sb1250/irq_handler.S b/arch/mips/sibyte/sb1250/irq_handler.S deleted file mode 100644 index 60edc8f..0000000 --- a/arch/mips/sibyte/sb1250/irq_handler.S +++ /dev/null @@ -1,147 +0,0 @@ -/* - * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/* - * sb1250_handle_int() is the routine that is actually called when an interrupt - * occurs. It is installed as the exception vector handler in arch_init_irq() - * in arch/mips/sibyte/sb1250/irq.c - * - * In the handle we figure out which interrupts need handling, and use that to - * call the dispatcher, which will take care of actually calling registered - * handlers - * - * Note that we take care of all raised interrupts in one go at the handler. - * This is more BSDish than the Indy code, and also, IMHO, more sane. - */ -#include <linux/config.h> - -#include <asm/addrspace.h> -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> -#include <asm/sibyte/sb1250_defs.h> -#include <asm/sibyte/sb1250_regs.h> -#include <asm/sibyte/sb1250_int.h> - -/* - * What a pain. We have to be really careful saving the upper 32 bits of any - * register across function calls if we don't want them trashed--since were - * running in -o32, the calling routing never saves the full 64 bits of a - * register across a function call. Being the interrupt handler, we're - * guaranteed that interrupts are disabled during this code so we don't have - * to worry about random interrupts blasting the high 32 bits. - */ - - .text - .set push - .set noreorder - .set noat - .set mips64 - .align 5 - NESTED(sb1250_irq_handler, PT_SIZE, sp) - SAVE_ALL - CLI - -#ifdef CONFIG_SIBYTE_SB1250_PROF - /* Set compare to count to silence count/compare timer interrupts */ - mfc0 t1, CP0_COUNT - mtc0 t1, CP0_COMPARE /* pause to clear IP[7] bit of cause ? */ -#endif - /* Read cause */ - mfc0 s0, CP0_CAUSE - -#ifdef CONFIG_SIBYTE_SB1250_PROF - /* Cpu performance counter interrupt is routed to IP[7] */ - andi t1, s0, CAUSEF_IP7 - beqz t1, 0f - srl t1, s0, (CAUSEB_BD-2) /* Shift BD bit to bit 2 */ - and t1, t1, 0x4 /* mask to get just BD bit */ - mfc0 a0, CP0_EPC - jal sbprof_cpu_intr - addu a0, a0, t1 /* a0 = EPC + (BD ? 4 : 0) */ - j ret_from_irq - nop -0: -#endif - - /* Timer interrupt is routed to IP[4] */ - andi t1, s0, CAUSEF_IP4 - beqz t1, 1f - nop - jal sb1250_timer_interrupt - move a0, sp /* Pass the registers along */ - j ret_from_irq - nop # delay slot -1: - -#ifdef CONFIG_SMP - /* Mailbox interrupt is routed to IP[3] */ - andi t1, s0, CAUSEF_IP3 - beqz t1, 2f - nop - jal sb1250_mailbox_interrupt - move a0, sp - j ret_from_irq - nop # delay slot -2: -#endif - -#ifdef CONFIG_KGDB - /* KGDB (uart 1) interrupt is routed to IP[6] */ - andi t1, s0, CAUSEF_IP6 - beqz t1, 1f - nop # delay slot - jal sb1250_kgdb_interrupt - move a0, sp - j ret_from_irq - nop # delay slot -1: -#endif - - and t1, s0, CAUSEF_IP2 - beqz t1, 4f - nop - - /* - * Default...we've hit an IP[2] interrupt, which means we've got to - * check the 1250 interrupt registers to figure out what to do - * Need to detect which CPU we're on, now that smp_affinity is supported. - */ - PTR_LA v0, CKSEG1 + A_IMR_CPU0_BASE -#ifdef CONFIG_SMP - lw t1, TI_CPU($28) - sll t1, IMR_REGISTER_SPACING_SHIFT - addu v0, t1 -#endif - ld s0, R_IMR_INTERRUPT_STATUS_BASE(v0) /* read IP[2] status */ - - beqz s0, 4f /* No interrupts. Return */ - move a1, sp - -3: dclz s1, s0 /* Find the next interrupt */ - dsubu a0, zero, s1 - daddiu a0, a0, 63 - jal do_IRQ - nop - -4: j ret_from_irq - nop - - .set pop - END(sb1250_irq_handler) diff --git a/arch/mips/sni/Makefile b/arch/mips/sni/Makefile index 1e5676e..9c7eaa5 100644 --- a/arch/mips/sni/Makefile +++ b/arch/mips/sni/Makefile @@ -2,6 +2,6 @@ # Makefile for the SNI specific part of the kernel # -obj-y += int-handler.o irq.o pcimt_scache.o reset.o setup.o +obj-y += irq.o pcimt_scache.o reset.o setup.o EXTRA_AFLAGS := $(CFLAGS) diff --git a/arch/mips/sni/int-handler.S b/arch/mips/sni/int-handler.S deleted file mode 100644 index 2cdc09f..0000000 --- a/arch/mips/sni/int-handler.S +++ /dev/null @@ -1,106 +0,0 @@ -/* - * SNI RM200 PCI specific interrupt handler code. - * - * Copyright (C) 1994, 95, 96, 97, 98, 1999, 2000, 01 by Ralf Baechle - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/sni.h> -#include <asm/stackframe.h> - -/* - * The PCI ASIC has the nasty property that it may delay writes if it is busy. - * As a consequence from writes that have not graduated when we exit from the - * interrupt handler we might catch a spurious interrupt. To avoid this we - * force the PCI ASIC to graduate all writes by executing a read from the - * PCI bus. - */ - .set noreorder - .set noat - .align 5 - NESTED(sni_rm200_pci_handle_int, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - - /* Blinken light ... */ - lb t0, led_cache - addiu t0, 1 - sb t0, led_cache - sb t0, PCIMT_CSLED # write only register - .data -led_cache: .byte 0 - .text - - mfc0 t0, CP0_STATUS - mfc0 t1, CP0_CAUSE - and t0, t1 - - andi t1, t0, 0x0800 # hardware interrupt 1 - bnez t1, _hwint1 - andi t1, t0, 0x4000 # hardware interrupt 4 - bnez t1, _hwint4 - andi t1, t0, 0x2000 # hardware interrupt 3 - bnez t1, _hwint3 - andi t1, t0, 0x1000 # hardware interrupt 2 - bnez t1, _hwint2 - andi t1, t0, 0x8000 # hardware interrupt 5 - bnez t1, _hwint5 - andi t1, t0, 0x0400 # hardware interrupt 0 - bnez t1, _hwint0 - nop - - j restore_all # spurious interrupt - nop - - ############################################################################## - -/* hwint0 should deal with MP agent, ASIC PCI, EISA NMI and debug - button interrupts. */ -_hwint0: jal pciasic_hwint0 - move a0, sp - j ret_from_irq - nop - -/* - * hwint 1 deals with EISA and SCSI interrupts - */ -_hwint1: jal pciasic_hwint1 - move a0, sp - j ret_from_irq - nop - - -/* - * This interrupt was used for the com1 console on the first prototypes; - * it's unsed otherwise - */ -_hwint2: jal pciasic_hwint2 - move a0, sp - j ret_from_irq - nop - -/* - * hwint 3 are the PCI interrupts A - D - */ -_hwint3: jal pciasic_hwint3 - move a0, sp - j ret_from_irq - nop - -/* - * hwint 4 is used for only the onboard PCnet 32. - */ -_hwint4: jal pciasic_hwint4 - move a0, sp - j ret_from_irq - nop - -/* hwint5 is the r4k count / compare interrupt */ -_hwint5: jal pciasic_hwint5 - move a0, sp - j ret_from_irq - nop - - END(sni_rm200_pci_handle_int) diff --git a/arch/mips/sni/irq.c b/arch/mips/sni/irq.c index 952038a..7365b48 100644 --- a/arch/mips/sni/irq.c +++ b/arch/mips/sni/irq.c @@ -19,8 +19,6 @@ DEFINE_SPINLOCK(pciasic_lock); -extern asmlinkage void sni_rm200_pci_handle_int(void); - static void enable_pciasic_irq(unsigned int irq) { unsigned int mask = 1 << (irq - PCIMT_IRQ_INT2); @@ -71,20 +69,20 @@ static struct hw_interrupt_type pciasic_irq_type = { * hwint0 should deal with MP agent, ASIC PCI, EISA NMI and debug * button interrupts. Later ... */ -void pciasic_hwint0(struct pt_regs *regs) +static void pciasic_hwint0(struct pt_regs *regs) { panic("Received int0 but no handler yet ..."); } /* This interrupt was used for the com1 console on the first prototypes. */ -void pciasic_hwint2(struct pt_regs *regs) +static void pciasic_hwint2(struct pt_regs *regs) { /* I think this shouldn't happen on production machines. */ panic("hwint2 and no handler yet"); } /* hwint5 is the r4k count / compare interrupt */ -void pciasic_hwint5(struct pt_regs *regs) +static void pciasic_hwint5(struct pt_regs *regs) { panic("hwint5 and no handler yet"); } @@ -105,7 +103,7 @@ static unsigned int ls1bit8(unsigned int x) * * The EISA_INT bit in CSITPEND is high active, all others are low active. */ -void pciasic_hwint1(struct pt_regs *regs) +static void pciasic_hwint1(struct pt_regs *regs) { u8 pend = *(volatile char *)PCIMT_CSITPEND; unsigned long flags; @@ -135,7 +133,7 @@ void pciasic_hwint1(struct pt_regs *regs) /* * hwint 3 should deal with the PCI A - D interrupts, */ -void pciasic_hwint3(struct pt_regs *regs) +static void pciasic_hwint3(struct pt_regs *regs) { u8 pend = *(volatile char *)PCIMT_CSITPEND; int irq; @@ -150,13 +148,34 @@ void pciasic_hwint3(struct pt_regs *regs) /* * hwint 4 is used for only the onboard PCnet 32. */ -void pciasic_hwint4(struct pt_regs *regs) +static void pciasic_hwint4(struct pt_regs *regs) { clear_c0_status(IE_IRQ4); do_IRQ(PCIMT_IRQ_ETHERNET, regs); set_c0_status(IE_IRQ4); } +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_status() & read_c0_cause(); + static unsigned char led_cache; + + *(volatile unsigned char *) PCIMT_CSLED = ++led_cache; + + if (pending & 0x0800) + pciasic_hwint1(regs); + else if (pending & 0x4000) + pciasic_hwint4(regs); + else if (pending & 0x2000) + pciasic_hwint3(regs); + else if (pending & 0x1000) + pciasic_hwint2(regs); + else if (pending & 0x8000) + pciasic_hwint5(regs); + else if (pending & 0x0400) + pciasic_hwint0(regs); +} + void __init init_pciasic(void) { unsigned long flags; @@ -176,8 +195,6 @@ void __init arch_init_irq(void) { int i; - set_except_vector(0, sni_rm200_pci_handle_int); - init_i8259_irqs(); /* Integrated i8259 */ init_pciasic(); diff --git a/arch/mips/tx4927/common/Makefile b/arch/mips/tx4927/common/Makefile index 8fa126b..9cb9535 100644 --- a/arch/mips/tx4927/common/Makefile +++ b/arch/mips/tx4927/common/Makefile @@ -6,7 +6,7 @@ # unless it's something special (ie not a .c file). # -obj-y += tx4927_prom.o tx4927_setup.o tx4927_irq.o tx4927_irq_handler.o +obj-y += tx4927_prom.o tx4927_setup.o tx4927_irq.o obj-$(CONFIG_TOSHIBA_FPCIB0) += smsc_fdc37m81x.o obj-$(CONFIG_KGDB) += tx4927_dbgio.o diff --git a/arch/mips/tx4927/common/tx4927_irq.c b/arch/mips/tx4927/common/tx4927_irq.c index 5ab2e2b..8ca6801 100644 --- a/arch/mips/tx4927/common/tx4927_irq.c +++ b/arch/mips/tx4927/common/tx4927_irq.c @@ -525,8 +525,6 @@ static void tx4927_irq_pic_end(unsigned int irq) */ void __init tx4927_irq_init(void) { - extern asmlinkage void tx4927_irq_handler(void); - TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "-\n"); TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "=Calling tx4927_irq_cp0_init()\n"); @@ -535,16 +533,12 @@ void __init tx4927_irq_init(void) TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "=Calling tx4927_irq_pic_init()\n"); tx4927_irq_pic_init(); - TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, - "=Calling set_except_vector(tx4927_irq_handler)\n"); - set_except_vector(0, tx4927_irq_handler); - TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "+\n"); return; } -int tx4927_irq_nested(void) +static int tx4927_irq_nested(void) { int sw_irq = 0; u32 level2; @@ -582,3 +576,25 @@ int tx4927_irq_nested(void) return (sw_irq); } + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_status() & read_c0_cause(); + + if (pending & STATUSF_IP7) /* cpu timer */ + do_IRQ(TX4927_IRQ_CPU_TIMER, regs); + else if (pending & STATUSF_IP2) { /* tx4927 pic */ + unsigned int irq = tx4927_irq_nested(); + + if (unlikely(irq == 0)) { + spurious_interrupt(regs); + return; + } + do_IRQ(irq, regs); + } else if (pending & STATUSF_IP0) /* user line 0 */ + do_IRQ(TX4927_IRQ_USER0, regs); + else if (pending & STATUSF_IP1) /* user line 1 */ + do_IRQ(TX4927_IRQ_USER1, regs); + else + spurious_interrupt(regs); +} diff --git a/arch/mips/tx4927/common/tx4927_irq_handler.S b/arch/mips/tx4927/common/tx4927_irq_handler.S deleted file mode 100644 index 0b2ea02..0000000 --- a/arch/mips/tx4927/common/tx4927_irq_handler.S +++ /dev/null @@ -1,104 +0,0 @@ -/* - * linux/arch/mips/tx4927/common/tx4927_irq_handler.S - * - * Primary interrupt handler for tx4927 based systems - * - * Author: MontaVista Software, Inc. - * Author: jsun@mvista.com or jsun@junsun.net - * source@mvista.com - * - * Copyright 2001-2002 MontaVista Software Inc. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR - * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE - * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 675 Mass Ave, Cambridge, MA 02139, USA. - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> -#include <asm/tx4927/tx4927.h> - - .align 5 - NESTED(tx4927_irq_handler, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - - mfc0 t0, CP0_CAUSE - mfc0 t1, CP0_STATUS - and t0, t1 - - andi t1, t0, STATUSF_IP7 /* cpu timer */ - bnez t1, ll_ip7 - - /* IP6..IP3 multiplexed -- do not use */ - - andi t1, t0, STATUSF_IP2 /* tx4927 pic */ - bnez t1, ll_ip2 - - andi t1, t0, STATUSF_IP0 /* user line 0 */ - bnez t1, ll_ip0 - - andi t1, t0, STATUSF_IP1 /* user line 1 */ - bnez t1, ll_ip1 - - .set reorder - - /* wrong alarm or masked ... */ - jal spurious_interrupt - nop - j ret_from_irq - END(tx4927_irq_handler) - - .align 5 - - -ll_ip7: - li a0, TX4927_IRQ_CPU_TIMER - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_ip2: - jal tx4927_irq_nested - nop - beqz v0, goto_spurious_interrupt - nop - move a0, v0 - move a1, sp - jal do_IRQ - j ret_from_irq - -goto_spurious_interrupt: - j spurious_interrupt - nop - -ll_ip1: - li a0, TX4927_IRQ_USER1 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_ip0: - li a0, TX4927_IRQ_USER0 - move a1, sp - jal do_IRQ - j ret_from_irq diff --git a/arch/mips/tx4938/common/Makefile b/arch/mips/tx4938/common/Makefile index 74c95c5..2033ae7 100644 --- a/arch/mips/tx4938/common/Makefile +++ b/arch/mips/tx4938/common/Makefile @@ -6,6 +6,6 @@ # unless it's something special (ie not a .c file). # -obj-y += prom.o setup.o irq.o irq_handler.o rtc_rx5c348.o +obj-y += prom.o setup.o irq.o rtc_rx5c348.o obj-$(CONFIG_KGDB) += dbgio.o diff --git a/arch/mips/tx4938/common/irq.c b/arch/mips/tx4938/common/irq.c index 4f90d7fa..8738051 100644 --- a/arch/mips/tx4938/common/irq.c +++ b/arch/mips/tx4938/common/irq.c @@ -392,11 +392,8 @@ tx4938_irq_pic_end(unsigned int irq) void __init tx4938_irq_init(void) { - extern asmlinkage void tx4938_irq_handler(void); - tx4938_irq_cp0_init(); tx4938_irq_pic_init(); - set_except_vector(0, tx4938_irq_handler); return; } @@ -422,3 +419,21 @@ tx4938_irq_nested(void) wbflush(); return (sw_irq); } + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status(); + + if (pending & STATUSF_IP7) + do_IRQ(TX4938_IRQ_CPU_TIMER, regs); + else if (pending & STATUSF_IP2) { + int irq = tx4938_irq_nested(); + if (irq) + do_IRQ(irq, regs); + else + spurious_interrupt(regs); + } else if (pending & STATUSF_IP1) + do_IRQ(TX4938_IRQ_USER1, regs); + else if (pending & STATUSF_IP0) + do_IRQ(TX4938_IRQ_USER0, regs); +} diff --git a/arch/mips/tx4938/common/irq_handler.S b/arch/mips/tx4938/common/irq_handler.S deleted file mode 100644 index 1b2f72b..0000000 --- a/arch/mips/tx4938/common/irq_handler.S +++ /dev/null @@ -1,84 +0,0 @@ -/* - * linux/arch/mips/tx4938/common/handler.S - * - * Primary interrupt handler for tx4938 based systems - * Copyright (C) 2000-2001 Toshiba Corporation - * - * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the - * terms of the GNU General Public License version 2. This program is - * licensed "as is" without any warranty of any kind, whether express - * or implied. - * - * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com) - */ -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> -#include <asm/tx4938/rbtx4938.h> - - - .align 5 - NESTED(tx4938_irq_handler, PT_SIZE, sp) - SAVE_ALL - CLI - .set at - - mfc0 t0, CP0_CAUSE - mfc0 t1, CP0_STATUS - and t0, t1 - - andi t1, t0, STATUSF_IP7 /* cpu timer */ - bnez t1, ll_ip7 - - /* IP6..IP3 multiplexed -- do not use */ - - andi t1, t0, STATUSF_IP2 /* tx4938 pic */ - bnez t1, ll_ip2 - - andi t1, t0, STATUSF_IP1 /* user line 1 */ - bnez t1, ll_ip1 - - andi t1, t0, STATUSF_IP0 /* user line 0 */ - bnez t1, ll_ip0 - - .set reorder - - nop - END(tx4938_irq_handler) - - .align 5 - - -ll_ip7: - li a0, TX4938_IRQ_CPU_TIMER - move a1, sp - jal do_IRQ - j ret_from_irq - - -ll_ip2: - jal tx4938_irq_nested - nop - beqz v0, goto_spurious_interrupt - nop - move a0, v0 - move a1, sp - jal do_IRQ - j ret_from_irq - -goto_spurious_interrupt: - j ret_from_irq - -ll_ip1: - li a0, TX4938_IRQ_USER1 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_ip0: - li a0, TX4938_IRQ_USER0 - move a1, sp - jal do_IRQ - j ret_from_irq diff --git a/arch/mips/vr41xx/common/Makefile b/arch/mips/vr41xx/common/Makefile index 9096302..aa37397 100644 --- a/arch/mips/vr41xx/common/Makefile +++ b/arch/mips/vr41xx/common/Makefile @@ -2,7 +2,7 @@ # Makefile for common code of the NEC VR4100 series. # -obj-y += bcu.o cmu.o icu.o init.o int-handler.o irq.o pmu.o type.o +obj-y += bcu.o cmu.o icu.o init.o irq.o pmu.o type.o obj-$(CONFIG_VRC4173) += vrc4173.o EXTRA_AFLAGS := $(CFLAGS) diff --git a/arch/mips/vr41xx/common/int-handler.S b/arch/mips/vr41xx/common/int-handler.S deleted file mode 100644 index e865234..0000000 --- a/arch/mips/vr41xx/common/int-handler.S +++ /dev/null @@ -1,116 +0,0 @@ -/* - * FILE NAME - * arch/mips/vr41xx/common/int-handler.S - * - * BRIEF MODULE DESCRIPTION - * Interrupt dispatcher for the NEC VR4100 series. - * - * Author: Yoichi Yuasa - * yyuasa@mvista.com or source@mvista.com - * - * Copyright 2001 MontaVista Software Inc. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR - * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE - * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 675 Mass Ave, Cambridge, MA 02139, USA. - */ -/* - * Changes: - * MontaVista Software Inc. <yyuasa@mvista.com> or <source@mvista.com> - * - New creation, NEC VR4100 series are supported. - * - * Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> - * - Coped with INTASSIGN of NEC VR4133. - */ -#include <asm/asm.h> -#include <asm/regdef.h> -#include <asm/mipsregs.h> -#include <asm/stackframe.h> - - .text - .set noreorder - - .align 5 - NESTED(vr41xx_handle_interrupt, PT_SIZE, ra) - .set noat - SAVE_ALL - CLI - .set at - .set noreorder - - /* - * Get the pending interrupts - */ - mfc0 t0, CP0_CAUSE - mfc0 t1, CP0_STATUS - andi t0, 0xff00 - and t0, t0, t1 - - andi t1, t0, CAUSEF_IP7 # MIPS timer interrupt - bnez t1, handle_irq - li a0, 7 - - andi t1, t0, 0x7800 # check for Int1-4 - beqz t1, 1f - - andi t1, t0, CAUSEF_IP3 # check for Int1 - bnez t1, handle_int - li a0, 3 - - andi t1, t0, CAUSEF_IP4 # check for Int2 - bnez t1, handle_int - li a0, 4 - - andi t1, t0, CAUSEF_IP5 # check for Int3 - bnez t1, handle_int - li a0, 5 - - andi t1, t0, CAUSEF_IP6 # check for Int4 - bnez t1, handle_int - li a0, 6 - -1: - andi t1, t0, CAUSEF_IP2 # check for Int0 - bnez t1, handle_int - li a0, 2 - - andi t1, t0, CAUSEF_IP0 # check for IP0 - bnez t1, handle_irq - li a0, 0 - - andi t1, t0, CAUSEF_IP1 # check for IP1 - bnez t1, handle_irq - li a0, 1 - - jal spurious_interrupt - nop - j ret_from_irq - nop - -handle_int: - jal irq_dispatch - move a1, sp - j ret_from_irq - nop - -handle_irq: - jal do_IRQ - move a1, sp - j ret_from_irq - END(vr41xx_handle_interrupt) diff --git a/arch/mips/vr41xx/common/irq.c b/arch/mips/vr41xx/common/irq.c index 61aa264..86796bb 100644 --- a/arch/mips/vr41xx/common/irq.c +++ b/arch/mips/vr41xx/common/irq.c @@ -59,7 +59,7 @@ int cascade_irq(unsigned int irq, int (*get_irq)(unsigned int, struct pt_regs *) EXPORT_SYMBOL_GPL(cascade_irq); -asmlinkage void irq_dispatch(unsigned int irq, struct pt_regs *regs) +static void irq_dispatch(unsigned int irq, struct pt_regs *regs) { irq_cascade_t *cascade; irq_desc_t *desc; @@ -84,11 +84,32 @@ asmlinkage void irq_dispatch(unsigned int irq, struct pt_regs *regs) do_IRQ(irq, regs); } -extern asmlinkage void vr41xx_handle_interrupt(void); +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; + + if (pending & CAUSEF_IP7) + do_IRQ(7, regs); + else if (pending & 0x7800) { + if (pending & CAUSEF_IP3) + irq_dispatch(3, regs); + else if (pending & CAUSEF_IP4) + irq_dispatch(4, regs); + else if (pending & CAUSEF_IP5) + irq_dispatch(5, regs); + else if (pending & CAUSEF_IP6) + irq_dispatch(6, regs); + } else if (pending & CAUSEF_IP2) + irq_dispatch(2, regs); + else if (pending & CAUSEF_IP0) + do_IRQ(0, regs); + else if (pending & CAUSEF_IP1) + do_IRQ(1, regs); + else + spurious_interrupt(regs); +} void __init arch_init_irq(void) { mips_cpu_irq_init(MIPS_CPU_IRQ_BASE); - - set_except_vector(0, vr41xx_handle_interrupt); } |
