diff options
Diffstat (limited to 'arch/mips/mips-boards/generic')
| -rw-r--r-- | arch/mips/mips-boards/generic/Makefile | 4 | ||||
| -rw-r--r-- | arch/mips/mips-boards/generic/gdb_hook.c | 2 | ||||
| -rw-r--r-- | arch/mips/mips-boards/generic/init.c | 1 | ||||
| -rw-r--r-- | arch/mips/mips-boards/generic/memory.c | 9 | ||||
| -rw-r--r-- | arch/mips/mips-boards/generic/mipsIRQ.S | 155 | ||||
| -rw-r--r-- | arch/mips/mips-boards/generic/time.c | 68 |
6 files changed, 68 insertions, 171 deletions
diff --git a/arch/mips/mips-boards/generic/Makefile b/arch/mips/mips-boards/generic/Makefile index b21bc68..be47c1c 100644 --- a/arch/mips/mips-boards/generic/Makefile +++ b/arch/mips/mips-boards/generic/Makefile @@ -18,8 +18,8 @@ # Makefile for the MIPS boards generic routines under Linux. # -obj-y := mipsIRQ.o reset.o display.o init.o memory.o \ - printf.o cmdline.o time.o +obj-y := reset.o display.o init.o memory.o printf.o \ + cmdline.o time.o obj-$(CONFIG_PCI) += pci.o obj-$(CONFIG_KGDB) += gdb_hook.o diff --git a/arch/mips/mips-boards/generic/gdb_hook.c b/arch/mips/mips-boards/generic/gdb_hook.c index 91a2ccb..6a1854d 100644 --- a/arch/mips/mips-boards/generic/gdb_hook.c +++ b/arch/mips/mips-boards/generic/gdb_hook.c @@ -25,7 +25,7 @@ #include <asm/serial.h> #include <asm/io.h> -static struct serial_state rs_table[RS_TABLE_SIZE] = { +static struct serial_state rs_table[] = { SERIAL_PORT_DFNS /* Defined in serial.h */ }; diff --git a/arch/mips/mips-boards/generic/init.c b/arch/mips/mips-boards/generic/init.c index eab5a70..17dfe6a 100644 --- a/arch/mips/mips-boards/generic/init.c +++ b/arch/mips/mips-boards/generic/init.c @@ -220,7 +220,6 @@ void __init kgdb_config (void) generic_putDebugChar (*s++); } - kgdb_enabled = 1; /* Breakpoint is invoked after interrupts are initialised */ } } diff --git a/arch/mips/mips-boards/generic/memory.c b/arch/mips/mips-boards/generic/memory.c index 32c9210..bc4d093 100644 --- a/arch/mips/mips-boards/generic/memory.c +++ b/arch/mips/mips-boards/generic/memory.c @@ -22,10 +22,12 @@ #include <linux/init.h> #include <linux/mm.h> #include <linux/bootmem.h> +#include <linux/pfn.h> #include <linux/string.h> #include <asm/bootinfo.h> #include <asm/page.h> +#include <asm/sections.h> #include <asm/mips-boards/prom.h> @@ -46,9 +48,6 @@ static char *mtypes[3] = { }; #endif -/* References to section boundaries */ -extern char _end; - struct prom_pmemblock * __init prom_getmdesc(void) { char *memsize_str; @@ -106,10 +105,10 @@ struct prom_pmemblock * __init prom_getmdesc(void) mdesc[3].type = yamon_dontuse; mdesc[3].base = 0x00100000; - mdesc[3].size = CPHYSADDR(PAGE_ALIGN(&_end)) - mdesc[3].base; + mdesc[3].size = CPHYSADDR(PFN_ALIGN((unsigned long)&_end)) - mdesc[3].base; mdesc[4].type = yamon_free; - mdesc[4].base = CPHYSADDR(PAGE_ALIGN(&_end)); + mdesc[4].base = CPHYSADDR(PFN_ALIGN(&_end)); mdesc[4].size = memsize - mdesc[4].base; return &mdesc[0]; diff --git a/arch/mips/mips-boards/generic/mipsIRQ.S b/arch/mips/mips-boards/generic/mipsIRQ.S deleted file mode 100644 index ddd5c73..0000000 --- a/arch/mips/mips-boards/generic/mipsIRQ.S +++ /dev/null @@ -1,155 +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> - -#ifdef CONFIG_MIPS_ATLAS -#include <asm/mips-boards/atlasint.h> -#define CASCADE_IRQ MIPSCPU_INT_ATLAS -#define CASCADE_DISPATCH atlas_hw0_irqdispatch -#endif -#ifdef CONFIG_MIPS_MALTA -#include <asm/mips-boards/maltaint.h> -#define CASCADE_IRQ MIPSCPU_INT_I8259A -#define CASCADE_DISPATCH malta_hw0_irqdispatch -#endif -#ifdef CONFIG_MIPS_SEAD -#include <asm/mips-boards/seadint.h> -#endif - -/* 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 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 - -#ifdef CASCADE_IRQ - li a1, CASCADE_IRQ - bne a0, a1, 1f - addu a0, MIPSCPU_INT_BASE - - jal CASCADE_DISPATCH - move a0, sp - - j ret_from_irq - nop -1: -#else - addu a0, MIPSCPU_INT_BASE -#endif - - 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/generic/time.c b/arch/mips/mips-boards/generic/time.c index 93f3bf2..a9f6124 100644 --- a/arch/mips/mips-boards/generic/time.c +++ b/arch/mips/mips-boards/generic/time.c @@ -30,6 +30,7 @@ #include <linux/mc146818rtc.h> #include <asm/mipsregs.h> +#include <asm/mipsmtregs.h> #include <asm/ptrace.h> #include <asm/hardirq.h> #include <asm/irq.h> @@ -50,16 +51,23 @@ unsigned long cpu_khz; static char display_string[] = " LINUX ON ATLAS "; #endif #if defined(CONFIG_MIPS_MALTA) +#if defined(CONFIG_MIPS_MT_SMTC) +static char display_string[] = " SMTC LINUX ON MALTA "; +#else static char display_string[] = " LINUX ON MALTA "; +#endif /* CONFIG_MIPS_MT_SMTC */ #endif #if defined(CONFIG_MIPS_SEAD) static char display_string[] = " LINUX ON SEAD "; #endif -static unsigned int display_count = 0; +static unsigned int display_count; #define MAX_DISPLAY_COUNT (sizeof(display_string) - 8) -static unsigned int timer_tick_count=0; +#define CPUCTR_IMASKBIT (0x100 << MIPSCPU_INT_CPUCTR) + +static unsigned int timer_tick_count; static int mips_cpu_timer_irq; +extern void smtc_timer_broadcast(int); static inline void scroll_display_message(void) { @@ -75,15 +83,55 @@ static void mips_timer_dispatch (struct pt_regs *regs) do_IRQ (mips_cpu_timer_irq, regs); } +/* + * Redeclare until I get around mopping the timer code insanity on MIPS. + */ extern int null_perf_irq(struct pt_regs *regs); extern int (*perf_irq)(struct pt_regs *regs); irqreturn_t mips_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) { - int r2 = cpu_has_mips_r2; int cpu = smp_processor_id(); + int r2 = cpu_has_mips_r2; + +#ifdef CONFIG_MIPS_MT_SMTC + /* + * In an SMTC system, one Count/Compare set exists per VPE. + * Which TC within a VPE gets the interrupt is essentially + * random - we only know that it shouldn't be one with + * IXMT set. Whichever TC gets the interrupt needs to + * send special interprocessor interrupts to the other + * TCs to make sure that they schedule, etc. + * + * That code is specific to the SMTC kernel, not to + * the a particular platform, so it's invoked from + * the general MIPS timer_interrupt routine. + */ + + /* + * DVPE is necessary so long as cross-VPE interrupts + * are done via read-modify-write of Cause register. + */ + int vpflags = dvpe(); + write_c0_compare (read_c0_count() - 1); + clear_c0_cause(CPUCTR_IMASKBIT); + evpe(vpflags); + + if (cpu_data[cpu].vpe_id == 0) { + timer_interrupt(irq, dev_id, regs); + scroll_display_message(); + } else + write_c0_compare (read_c0_count() + ( mips_hpt_frequency/HZ)); + smtc_timer_broadcast(cpu_data[cpu].vpe_id); + if (cpu != 0) + /* + * Other CPUs should do profiling and process accounting + */ + local_timer_interrupt(irq, dev_id, regs); + +#else /* CONFIG_MIPS_MT_SMTC */ if (cpu == 0) { /* * CPU 0 handles the global timer interrupt job and process @@ -107,12 +155,14 @@ irqreturn_t mips_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) * More support needs to be added to kernel/time for * counter/timer interrupts on multiple CPU's */ - write_c0_compare (read_c0_count() + (mips_hpt_frequency/HZ)); + write_c0_compare(read_c0_count() + (mips_hpt_frequency/HZ)); + /* - * other CPUs should do profiling and process accounting + * Other CPUs should do profiling and process accounting */ - local_timer_interrupt (irq, dev_id, regs); + local_timer_interrupt(irq, dev_id, regs); } +#endif /* CONFIG_MIPS_MT_SMTC */ out: return IRQ_HANDLED; @@ -126,7 +176,7 @@ static unsigned int __init estimate_cpu_frequency(void) unsigned int prid = read_c0_prid() & 0xffff00; unsigned int count; -#ifdef CONFIG_MIPS_SEAD +#if defined(CONFIG_MIPS_SEAD) || defined(CONFIG_MIPS_SIM) /* * The SEAD board doesn't have a real time clock, so we can't * really calculate the timer frequency @@ -211,7 +261,11 @@ void __init mips_timer_setup(struct irqaction *irq) /* we are using the cpu counter for timer interrupts */ irq->handler = mips_timer_interrupt; /* we use our own handler */ +#ifdef CONFIG_MIPS_MT_SMTC + setup_irq_smtc(mips_cpu_timer_irq, irq, CPUCTR_IMASKBIT); +#else setup_irq(mips_cpu_timer_irq, irq); +#endif /* CONFIG_MIPS_MT_SMTC */ #ifdef CONFIG_SMP /* irq_desc(riptor) is a global resource, when the interrupt overlaps |
