diff options
Diffstat (limited to 'arch/mips/mti-malta/malta-int.c')
| -rw-r--r-- | arch/mips/mti-malta/malta-int.c | 712 |
1 files changed, 712 insertions, 0 deletions
diff --git a/arch/mips/mti-malta/malta-int.c b/arch/mips/mti-malta/malta-int.c new file mode 100644 index 0000000..ea17611 --- /dev/null +++ b/arch/mips/mti-malta/malta-int.c @@ -0,0 +1,712 @@ +/* + * Carsten Langgaard, carstenl@mips.com + * Copyright (C) 2000, 2001, 2004 MIPS Technologies, Inc. + * Copyright (C) 2001 Ralf Baechle + * + * 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. + * + * Routines for generic manipulation of the interrupts found on the MIPS + * Malta board. + * The interrupt controller is located in the South Bridge a PIIX4 device + * with two internal 82C95 interrupt controllers. + */ +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/kernel_stat.h> +#include <linux/kernel.h> +#include <linux/random.h> + +#include <asm/traps.h> +#include <asm/i8259.h> +#include <asm/irq_cpu.h> +#include <asm/irq_regs.h> +#include <asm/mips-boards/malta.h> +#include <asm/mips-boards/maltaint.h> +#include <asm/mips-boards/piix4.h> +#include <asm/gt64120.h> +#include <asm/mips-boards/generic.h> +#include <asm/mips-boards/msc01_pci.h> +#include <asm/msc01_ic.h> +#include <asm/gic.h> +#include <asm/gcmpregs.h> + +int gcmp_present = -1; +int gic_present; +static unsigned long _msc01_biu_base; +static unsigned long _gcmp_base; +static unsigned int ipi_map[NR_CPUS]; + +static DEFINE_SPINLOCK(mips_irq_lock); + +static inline int mips_pcibios_iack(void) +{ + int irq; + u32 dummy; + + /* + * Determine highest priority pending interrupt by performing + * a PCI Interrupt Acknowledge cycle. + */ + switch (mips_revision_sconid) { + case MIPS_REVISION_SCON_SOCIT: + case MIPS_REVISION_SCON_ROCIT: + case MIPS_REVISION_SCON_SOCITSC: + case MIPS_REVISION_SCON_SOCITSCP: + MSC_READ(MSC01_PCI_IACK, irq); + irq &= 0xff; + break; + case MIPS_REVISION_SCON_GT64120: + irq = GT_READ(GT_PCI0_IACK_OFS); + irq &= 0xff; + break; + case MIPS_REVISION_SCON_BONITO: + /* The following will generate a PCI IACK cycle on the + * Bonito controller. It's a little bit kludgy, but it + * was the easiest way to implement it in hardware at + * the given time. + */ + BONITO_PCIMAP_CFG = 0x20000; + + /* Flush Bonito register block */ + dummy = BONITO_PCIMAP_CFG; + iob(); /* sync */ + + irq = readl((u32 *)_pcictrl_bonito_pcicfg); + iob(); /* sync */ + irq &= 0xff; + BONITO_PCIMAP_CFG = 0; + break; + default: + printk(KERN_WARNING "Unknown system controller.\n"); + return -1; + } + return irq; +} + +static inline int get_int(void) +{ + unsigned long flags; + int irq; + spin_lock_irqsave(&mips_irq_lock, flags); + + irq = mips_pcibios_iack(); + + /* + * The only way we can decide if an interrupt is spurious + * is by checking the 8259 registers. This needs a spinlock + * on an SMP system, so leave it up to the generic code... + */ + + spin_unlock_irqrestore(&mips_irq_lock, flags); + + return irq; +} + +static void malta_hw0_irqdispatch(void) +{ + int irq; + + irq = get_int(); + if (irq < 0) { + /* interrupt has already been cleared */ + return; + } + + do_IRQ(MALTA_INT_BASE + irq); +} + +static void malta_ipi_irqdispatch(void) +{ + int irq; + + irq = gic_get_int(); + if (irq < 0) + return; /* interrupt has already been cleared */ + + do_IRQ(MIPS_GIC_IRQ_BASE + irq); +} + +static void corehi_irqdispatch(void) +{ + unsigned int intedge, intsteer, pcicmd, pcibadaddr; + unsigned int pcimstat, intisr, inten, intpol; + unsigned int intrcause, datalo, datahi; + struct pt_regs *regs = get_irq_regs(); + + printk(KERN_EMERG "CoreHI interrupt, shouldn't happen, we die here!\n"); + printk(KERN_EMERG "epc : %08lx\nStatus: %08lx\n" + "Cause : %08lx\nbadVaddr : %08lx\n", + regs->cp0_epc, regs->cp0_status, + regs->cp0_cause, regs->cp0_badvaddr); + + /* Read all the registers and then print them as there is a + problem with interspersed printk's upsetting the Bonito controller. + Do it for the others too. + */ + + switch (mips_revision_sconid) { + case MIPS_REVISION_SCON_SOCIT: + case MIPS_REVISION_SCON_ROCIT: + case MIPS_REVISION_SCON_SOCITSC: + case MIPS_REVISION_SCON_SOCITSCP: + ll_msc_irq(); + break; + case MIPS_REVISION_SCON_GT64120: + intrcause = GT_READ(GT_INTRCAUSE_OFS); + datalo = GT_READ(GT_CPUERR_ADDRLO_OFS); + datahi = GT_READ(GT_CPUERR_ADDRHI_OFS); + printk(KERN_EMERG "GT_INTRCAUSE = %08x\n", intrcause); + printk(KERN_EMERG "GT_CPUERR_ADDR = %02x%08x\n", + datahi, datalo); + break; + case MIPS_REVISION_SCON_BONITO: + pcibadaddr = BONITO_PCIBADADDR; + pcimstat = BONITO_PCIMSTAT; + intisr = BONITO_INTISR; + inten = BONITO_INTEN; + intpol = BONITO_INTPOL; + intedge = BONITO_INTEDGE; + intsteer = BONITO_INTSTEER; + pcicmd = BONITO_PCICMD; + printk(KERN_EMERG "BONITO_INTISR = %08x\n", intisr); + printk(KERN_EMERG "BONITO_INTEN = %08x\n", inten); + printk(KERN_EMERG "BONITO_INTPOL = %08x\n", intpol); + printk(KERN_EMERG "BONITO_INTEDGE = %08x\n", intedge); + printk(KERN_EMERG "BONITO_INTSTEER = %08x\n", intsteer); + printk(KERN_EMERG "BONITO_PCICMD = %08x\n", pcicmd); + printk(KERN_EMERG "BONITO_PCIBADADDR = %08x\n", pcibadaddr); + printk(KERN_EMERG "BONITO_PCIMSTAT = %08x\n", pcimstat); + break; + } + + 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 = pending & 0xf000; + t0 = t0 < 1; + t0 = t0 << 2; + a0 = a0 - t0; + pending = pending << t0; + + t0 = pending & 0xc000; + t0 = t0 < 1; + t0 = t0 << 1; + a0 = a0 - t0; + pending = pending << t0; + + t0 = pending & 0x8000; + t0 = t0 < 1; + /* t0 = t0 << 2; */ + a0 = a0 - t0; + /* pending = pending << 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(void) +{ + 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(); + else if (gic_present && ((1 << irq) & ipi_map[smp_processor_id()])) + malta_ipi_irqdispatch(); + else if (irq >= 0) + do_IRQ(MIPS_CPU_IRQ_BASE + irq); + else + spurious_interrupt(); +} + +#ifdef CONFIG_MIPS_MT_SMP + + +#define GIC_MIPS_CPU_IPI_RESCHED_IRQ 3 +#define GIC_MIPS_CPU_IPI_CALL_IRQ 4 + +#define MIPS_CPU_IPI_RESCHED_IRQ 0 /* SW int 0 for resched */ +#define C_RESCHED C_SW0 +#define MIPS_CPU_IPI_CALL_IRQ 1 /* SW int 1 for resched */ +#define C_CALL C_SW1 +static int cpu_ipi_resched_irq, cpu_ipi_call_irq; + +static void ipi_resched_dispatch(void) +{ + do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_RESCHED_IRQ); +} + +static void ipi_call_dispatch(void) +{ + do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_CALL_IRQ); +} + +static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id) +{ + return IRQ_HANDLED; +} + +static irqreturn_t ipi_call_interrupt(int irq, void *dev_id) +{ + smp_call_function_interrupt(); + + return IRQ_HANDLED; +} + +static struct irqaction irq_resched = { + .handler = ipi_resched_interrupt, + .flags = IRQF_DISABLED|IRQF_PERCPU, + .name = "IPI_resched" +}; + +static struct irqaction irq_call = { + .handler = ipi_call_interrupt, + .flags = IRQF_DISABLED|IRQF_PERCPU, + .name = "IPI_call" +}; +#endif /* CONFIG_MIPS_MT_SMP */ + +static struct irqaction i8259irq = { + .handler = no_action, + .name = "XT-PIC cascade" +}; + +static struct irqaction corehi_irqaction = { + .handler = no_action, + .name = "CoreHi" +}; + +static msc_irqmap_t __initdata msc_irqmap[] = { + {MSC01C_INT_TMR, MSC01_IRQ_EDGE, 0}, + {MSC01C_INT_PCI, MSC01_IRQ_LEVEL, 0}, +}; +static int __initdata msc_nr_irqs = ARRAY_SIZE(msc_irqmap); + +static msc_irqmap_t __initdata msc_eicirqmap[] = { + {MSC01E_INT_SW0, MSC01_IRQ_LEVEL, 0}, + {MSC01E_INT_SW1, MSC01_IRQ_LEVEL, 0}, + {MSC01E_INT_I8259A, MSC01_IRQ_LEVEL, 0}, + {MSC01E_INT_SMI, MSC01_IRQ_LEVEL, 0}, + {MSC01E_INT_COREHI, MSC01_IRQ_LEVEL, 0}, + {MSC01E_INT_CORELO, MSC01_IRQ_LEVEL, 0}, + {MSC01E_INT_TMR, MSC01_IRQ_EDGE, 0}, + {MSC01E_INT_PCI, MSC01_IRQ_LEVEL, 0}, + {MSC01E_INT_PERFCTR, MSC01_IRQ_LEVEL, 0}, + {MSC01E_INT_CPUCTR, MSC01_IRQ_LEVEL, 0} +}; + +static int __initdata msc_nr_eicirqs = ARRAY_SIZE(msc_eicirqmap); + +#if defined(CONFIG_MIPS_MT_SMP) +/* + * This GIC specific tabular array defines the association between External + * Interrupts and CPUs/Core Interrupts. The nature of the External + * Interrupts is also defined here - polarity/trigger. + */ +static struct gic_intr_map gic_intr_map[] = { + { GIC_EXT_INTR(0), X, X, X, X, 0 }, + { GIC_EXT_INTR(1), X, X, X, X, 0 }, + { GIC_EXT_INTR(2), X, X, X, X, 0 }, + { GIC_EXT_INTR(3), 0, GIC_CPU_INT0, GIC_POL_POS, GIC_TRIG_LEVEL, 0 }, + { GIC_EXT_INTR(4), 0, GIC_CPU_INT1, GIC_POL_POS, GIC_TRIG_LEVEL, 0 }, + { GIC_EXT_INTR(5), 0, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_LEVEL, 0 }, + { GIC_EXT_INTR(6), 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, 0 }, + { GIC_EXT_INTR(7), 0, GIC_CPU_INT4, GIC_POL_POS, GIC_TRIG_LEVEL, 0 }, + { GIC_EXT_INTR(8), 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, 0 }, + { GIC_EXT_INTR(9), 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, 0 }, + { GIC_EXT_INTR(10), X, X, X, X, 0 }, + { GIC_EXT_INTR(11), X, X, X, X, 0 }, + { GIC_EXT_INTR(12), 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, 0 }, + { GIC_EXT_INTR(13), 0, GIC_MAP_TO_NMI_MSK, GIC_POL_POS, GIC_TRIG_LEVEL, 0 }, + { GIC_EXT_INTR(14), 0, GIC_MAP_TO_NMI_MSK, GIC_POL_POS, GIC_TRIG_LEVEL, 0 }, + { GIC_EXT_INTR(15), X, X, X, X, 0 }, + { GIC_EXT_INTR(16), 0, GIC_CPU_INT1, GIC_POL_POS, GIC_TRIG_EDGE, 1 }, + { GIC_EXT_INTR(17), 0, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_EDGE, 1 }, + { GIC_EXT_INTR(18), 1, GIC_CPU_INT1, GIC_POL_POS, GIC_TRIG_EDGE, 1 }, + { GIC_EXT_INTR(19), 1, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_EDGE, 1 }, + { GIC_EXT_INTR(20), 2, GIC_CPU_INT1, GIC_POL_POS, GIC_TRIG_EDGE, 1 }, + { GIC_EXT_INTR(21), 2, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_EDGE, 1 }, + { GIC_EXT_INTR(22), 3, GIC_CPU_INT1, GIC_POL_POS, GIC_TRIG_EDGE, 1 }, + { GIC_EXT_INTR(23), 3, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_EDGE, 1 }, +}; +#endif + +/* + * GCMP needs to be detected before any SMP initialisation + */ +static int __init gcmp_probe(unsigned long addr, unsigned long size) +{ + if (gcmp_present >= 0) + return gcmp_present; + + _gcmp_base = (unsigned long) ioremap_nocache(GCMP_BASE_ADDR, GCMP_ADDRSPACE_SZ); + _msc01_biu_base = (unsigned long) ioremap_nocache(MSC01_BIU_REG_BASE, MSC01_BIU_ADDRSPACE_SZ); + gcmp_present = (GCMPGCB(GCMPB) & GCMP_GCB_GCMPB_GCMPBASE_MSK) == GCMP_BASE_ADDR; + + if (gcmp_present) + printk(KERN_DEBUG "GCMP present\n"); + return gcmp_present; +} + +#if defined(CONFIG_MIPS_MT_SMP) +static void __init fill_ipi_map(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(gic_intr_map); i++) { + if (gic_intr_map[i].ipiflag && (gic_intr_map[i].cpunum != X)) + ipi_map[gic_intr_map[i].cpunum] |= + (1 << (gic_intr_map[i].pin + 2)); + } +} +#endif + +void __init arch_init_irq(void) +{ + int gic_present, gcmp_present; + + init_i8259_irqs(); + + if (!cpu_has_veic) + mips_cpu_irq_init(); + + gcmp_present = gcmp_probe(GCMP_BASE_ADDR, GCMP_ADDRSPACE_SZ); + if (gcmp_present) { + GCMPGCB(GICBA) = GIC_BASE_ADDR | GCMP_GCB_GICBA_EN_MSK; + gic_present = 1; + } else { + _msc01_biu_base = (unsigned long) ioremap_nocache(MSC01_BIU_REG_BASE, MSC01_BIU_ADDRSPACE_SZ); + gic_present = (REG(_msc01_biu_base, MSC01_SC_CFG) & + MSC01_SC_CFG_GICPRES_MSK) >> MSC01_SC_CFG_GICPRES_SHF; + } + if (gic_present) + printk(KERN_DEBUG "GIC present\n"); + + switch (mips_revision_sconid) { + case MIPS_REVISION_SCON_SOCIT: + case MIPS_REVISION_SCON_ROCIT: + if (cpu_has_veic) + init_msc_irqs(MIPS_MSC01_IC_REG_BASE, + MSC01E_INT_BASE, msc_eicirqmap, + msc_nr_eicirqs); + else + init_msc_irqs(MIPS_MSC01_IC_REG_BASE, + MSC01C_INT_BASE, msc_irqmap, + msc_nr_irqs); + break; + + case MIPS_REVISION_SCON_SOCITSC: + case MIPS_REVISION_SCON_SOCITSCP: + if (cpu_has_veic) + init_msc_irqs(MIPS_SOCITSC_IC_REG_BASE, + MSC01E_INT_BASE, msc_eicirqmap, + msc_nr_eicirqs); + else + init_msc_irqs(MIPS_SOCITSC_IC_REG_BASE, + MSC01C_INT_BASE, msc_irqmap, + msc_nr_irqs); + } + + if (cpu_has_veic) { + set_vi_handler(MSC01E_INT_I8259A, malta_hw0_irqdispatch); + set_vi_handler(MSC01E_INT_COREHI, corehi_irqdispatch); + setup_irq(MSC01E_INT_BASE+MSC01E_INT_I8259A, &i8259irq); + setup_irq(MSC01E_INT_BASE+MSC01E_INT_COREHI, &corehi_irqaction); + } else if (cpu_has_vint) { + set_vi_handler(MIPSCPU_INT_I8259A, malta_hw0_irqdispatch); + set_vi_handler(MIPSCPU_INT_COREHI, corehi_irqdispatch); +#ifdef CONFIG_MIPS_MT_SMTC + setup_irq_smtc(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_I8259A, &i8259irq, + (0x100 << MIPSCPU_INT_I8259A)); + setup_irq_smtc(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI, + &corehi_irqaction, (0x100 << MIPSCPU_INT_COREHI)); + /* + * Temporary hack to ensure that the subsidiary device + * interrupts coing in via the i8259A, but associated + * with low IRQ numbers, will restore the Status.IM + * value associated with the i8259A. + */ + { + int i; + + for (i = 0; i < 16; i++) + irq_hwmask[i] = (0x100 << MIPSCPU_INT_I8259A); + } +#else /* Not SMTC */ + setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_I8259A, &i8259irq); + setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI, + &corehi_irqaction); +#endif /* CONFIG_MIPS_MT_SMTC */ + } else { + setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_I8259A, &i8259irq); + setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI, + &corehi_irqaction); + } + +#if defined(CONFIG_MIPS_MT_SMP) + if (gic_present) { + /* FIXME */ + int i; + struct { + unsigned int resched; + unsigned int call; + } ipiirq[] = { + { + .resched = GIC_IPI_EXT_INTR_RESCHED_VPE0, + .call = GIC_IPI_EXT_INTR_CALLFNC_VPE0}, + { + .resched = GIC_IPI_EXT_INTR_RESCHED_VPE1, + .call = GIC_IPI_EXT_INTR_CALLFNC_VPE1 + }, { + .resched = GIC_IPI_EXT_INTR_RESCHED_VPE2, + .call = GIC_IPI_EXT_INTR_CALLFNC_VPE2 + }, { + .resched = GIC_IPI_EXT_INTR_RESCHED_VPE3, + .call = GIC_IPI_EXT_INTR_CALLFNC_VPE3 + } + }; + fill_ipi_map(); + gic_init(GIC_BASE_ADDR, GIC_ADDRSPACE_SZ, gic_intr_map, ARRAY_SIZE(gic_intr_map), MIPS_GIC_IRQ_BASE); + if (!gcmp_present) { + /* Enable the GIC */ + i = REG(_msc01_biu_base, MSC01_SC_CFG); + REG(_msc01_biu_base, MSC01_SC_CFG) = + (i | (0x1 << MSC01_SC_CFG_GICENA_SHF)); + pr_debug("GIC Enabled\n"); + } + + /* set up ipi interrupts */ + if (cpu_has_vint) { + set_vi_handler(MIPSCPU_INT_IPI0, malta_ipi_irqdispatch); + set_vi_handler(MIPSCPU_INT_IPI1, malta_ipi_irqdispatch); + } + /* Argh.. this really needs sorting out.. */ + printk("CPU%d: status register was %08x\n", smp_processor_id(), read_c0_status()); + write_c0_status(read_c0_status() | STATUSF_IP3 | STATUSF_IP4); + printk("CPU%d: status register now %08x\n", smp_processor_id(), read_c0_status()); + write_c0_status(0x1100dc00); + printk("CPU%d: status register frc %08x\n", smp_processor_id(), read_c0_status()); + for (i = 0; i < ARRAY_SIZE(ipiirq); i++) { + setup_irq(MIPS_GIC_IRQ_BASE + ipiirq[i].resched, &irq_resched); + setup_irq(MIPS_GIC_IRQ_BASE + ipiirq[i].call, &irq_call); + + set_irq_handler(MIPS_GIC_IRQ_BASE + ipiirq[i].resched, handle_percpu_irq); + set_irq_handler(MIPS_GIC_IRQ_BASE + ipiirq[i].call, handle_percpu_irq); + } + } else { + /* set up ipi interrupts */ + if (cpu_has_veic) { + set_vi_handler (MSC01E_INT_SW0, ipi_resched_dispatch); + set_vi_handler (MSC01E_INT_SW1, ipi_call_dispatch); + cpu_ipi_resched_irq = MSC01E_INT_SW0; + cpu_ipi_call_irq = MSC01E_INT_SW1; + } else { + if (cpu_has_vint) { + set_vi_handler (MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch); + set_vi_handler (MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch); + } + cpu_ipi_resched_irq = MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_RESCHED_IRQ; + cpu_ipi_call_irq = MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_CALL_IRQ; + } + + setup_irq(cpu_ipi_resched_irq, &irq_resched); + setup_irq(cpu_ipi_call_irq, &irq_call); + + set_irq_handler(cpu_ipi_resched_irq, handle_percpu_irq); + set_irq_handler(cpu_ipi_call_irq, handle_percpu_irq); + } +#endif +} + +void malta_be_init(void) +{ + if (gcmp_present) { + /* Could change CM error mask register */ + } +} + + +static char *tr[8] = { + "mem", "gcr", "gic", "mmio", + "0x04", "0x05", "0x06", "0x07" +}; + +static char *mcmd[32] = { + [0x00] = "0x00", + [0x01] = "Legacy Write", + [0x02] = "Legacy Read", + [0x03] = "0x03", + [0x04] = "0x04", + [0x05] = "0x05", + [0x06] = "0x06", + [0x07] = "0x07", + [0x08] = "Coherent Read Own", + [0x09] = "Coherent Read Share", + [0x0a] = "Coherent Read Discard", + [0x0b] = "Coherent Ready Share Always", + [0x0c] = "Coherent Upgrade", + [0x0d] = "Coherent Writeback", + [0x0e] = "0x0e", + [0x0f] = "0x0f", + [0x10] = "Coherent Copyback", + [0x11] = "Coherent Copyback Invalidate", + [0x12] = "Coherent Invalidate", + [0x13] = "Coherent Write Invalidate", + [0x14] = "Coherent Completion Sync", + [0x15] = "0x15", + [0x16] = "0x16", + [0x17] = "0x17", + [0x18] = "0x18", + [0x19] = "0x19", + [0x1a] = "0x1a", + [0x1b] = "0x1b", + [0x1c] = "0x1c", + [0x1d] = "0x1d", + [0x1e] = "0x1e", + [0x1f] = "0x1f" +}; + +static char *core[8] = { + "Invalid/OK", "Invalid/Data", + "Shared/OK", "Shared/Data", + "Modified/OK", "Modified/Data", + "Exclusive/OK", "Exclusive/Data" +}; + +static char *causes[32] = { + "None", "GC_WR_ERR", "GC_RD_ERR", "COH_WR_ERR", + "COH_RD_ERR", "MMIO_WR_ERR", "MMIO_RD_ERR", "0x07", + "0x08", "0x09", "0x0a", "0x0b", + "0x0c", "0x0d", "0x0e", "0x0f", + "0x10", "0x11", "0x12", "0x13", + "0x14", "0x15", "0x16", "INTVN_WR_ERR", + "INTVN_RD_ERR", "0x19", "0x1a", "0x1b", + "0x1c", "0x1d", "0x1e", "0x1f" +}; + +int malta_be_handler(struct pt_regs *regs, int is_fixup) +{ + /* This duplicates the handling in do_be which seems wrong */ + int retval = is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL; + + if (gcmp_present) { + unsigned long cm_error = GCMPGCB(GCMEC); + unsigned long cm_addr = GCMPGCB(GCMEA); + unsigned long cm_other = GCMPGCB(GCMEO); + unsigned long cause, ocause; + char buf[256]; + + cause = (cm_error & GCMP_GCB_GMEC_ERROR_TYPE_MSK); + if (cause != 0) { + cause >>= GCMP_GCB_GMEC_ERROR_TYPE_SHF; + if (cause < 16) { + unsigned long cca_bits = (cm_error >> 15) & 7; + unsigned long tr_bits = (cm_error >> 12) & 7; + unsigned long mcmd_bits = (cm_error >> 7) & 0x1f; + unsigned long stag_bits = (cm_error >> 3) & 15; + unsigned long sport_bits = (cm_error >> 0) & 7; + + snprintf(buf, sizeof(buf), + "CCA=%lu TR=%s MCmd=%s STag=%lu " + "SPort=%lu\n", + cca_bits, tr[tr_bits], mcmd[mcmd_bits], + stag_bits, sport_bits); + } else { + /* glob state & sresp together */ + unsigned long c3_bits = (cm_error >> 18) & 7; + unsigned long c2_bits = (cm_error >> 15) & 7; + unsigned long c1_bits = (cm_error >> 12) & 7; + unsigned long c0_bits = (cm_error >> 9) & 7; + unsigned long sc_bit = (cm_error >> 8) & 1; + unsigned long mcmd_bits = (cm_error >> 3) & 0x1f; + unsigned long sport_bits = (cm_error >> 0) & 7; + snprintf(buf, sizeof(buf), + "C3=%s C2=%s C1=%s C0=%s SC=%s " + "MCmd=%s SPort=%lu\n", + core[c3_bits], core[c2_bits], + core[c1_bits], core[c0_bits], + sc_bit ? "True" : "False", + mcmd[mcmd_bits], sport_bits); + } + + ocause = (cm_other & GCMP_GCB_GMEO_ERROR_2ND_MSK) >> + GCMP_GCB_GMEO_ERROR_2ND_SHF; + + printk("CM_ERROR=%08lx %s <%s>\n", cm_error, + causes[cause], buf); + printk("CM_ADDR =%08lx\n", cm_addr); + printk("CM_OTHER=%08lx %s\n", cm_other, causes[ocause]); + + /* reprime cause register */ + GCMPGCB(GCMEC) = 0; + } + } + + return retval; +} |
