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linux-sg2042/arch/mips/mti-malta/malta-int.c

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/*
* 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/smp.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_RAW_SPINLOCK(mips_irq_lock);
static inline int mips_pcibios_iack(void)
{
int irq;
/*
* 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 */
(void) BONITO_PCIMAP_CFG;
iob(); /* sync */
irq = __raw_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;
raw_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...
*/
raw_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)
{
scheduler_ipi();
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 int gic_resched_int_base;
static int gic_call_int_base;
#define GIC_RESCHED_INT(cpu) (gic_resched_int_base+(cpu))
#define GIC_CALL_INT(cpu) (gic_call_int_base+(cpu))
unsigned int plat_ipi_call_int_xlate(unsigned int cpu)
{
return GIC_CALL_INT(cpu);
}
unsigned int plat_ipi_resched_int_xlate(unsigned int cpu)
{
return GIC_RESCHED_INT(cpu);
}
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);
/*
* 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.
*/
#define GIC_CPU_NMI GIC_MAP_TO_NMI_MSK
#define X GIC_UNUSED
static struct gic_intr_map gic_intr_map[GIC_NUM_INTRS] = {
{ X, X, X, X, 0 },
{ X, X, X, X, 0 },
{ X, X, X, X, 0 },
{ 0, GIC_CPU_INT0, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT1, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT4, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ X, X, X, X, 0 },
{ X, X, X, X, 0 },
{ 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_NMI, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_NMI, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ X, X, X, X, 0 },
/* The remainder of this table is initialised by fill_ipi_map */
};
#undef X
/*
* GCMP needs to be detected before any SMP initialisation
*/
int __init gcmp_probe(unsigned long addr, unsigned long size)
{
if (mips_revision_sconid != MIPS_REVISION_SCON_ROCIT) {
gcmp_present = 0;
return gcmp_present;
}
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)
pr_debug("GCMP present\n");
return gcmp_present;
}
/* Return the number of IOCU's present */
int __init gcmp_niocu(void)
{
return gcmp_present ?
(GCMPGCB(GC) & GCMP_GCB_GC_NUMIOCU_MSK) >> GCMP_GCB_GC_NUMIOCU_SHF :
0;
}
/* Set GCMP region attributes */
void __init gcmp_setregion(int region, unsigned long base,
unsigned long mask, int type)
{
GCMPGCBn(CMxBASE, region) = base;
GCMPGCBn(CMxMASK, region) = mask | type;
}
#if defined(CONFIG_MIPS_MT_SMP)
static void __init fill_ipi_map1(int baseintr, int cpu, int cpupin)
{
int intr = baseintr + cpu;
gic_intr_map[intr].cpunum = cpu;
gic_intr_map[intr].pin = cpupin;
gic_intr_map[intr].polarity = GIC_POL_POS;
gic_intr_map[intr].trigtype = GIC_TRIG_EDGE;
gic_intr_map[intr].flags = GIC_FLAG_IPI;
ipi_map[cpu] |= (1 << (cpupin + 2));
}
static void __init fill_ipi_map(void)
{
int cpu;
for (cpu = 0; cpu < NR_CPUS; cpu++) {
fill_ipi_map1(gic_resched_int_base, cpu, GIC_CPU_INT1);
fill_ipi_map1(gic_call_int_base, cpu, GIC_CPU_INT2);
}
}
#endif
void __init arch_init_ipiirq(int irq, struct irqaction *action)
{
setup_irq(irq, action);
irq_set_handler(irq, handle_percpu_irq);
}
void __init arch_init_irq(void)
{
init_i8259_irqs();
if (!cpu_has_veic)
mips_cpu_irq_init();
if (gcmp_present) {
GCMPGCB(GICBA) = GIC_BASE_ADDR | GCMP_GCB_GICBA_EN_MSK;
gic_present = 1;
} else {
if (mips_revision_sconid == MIPS_REVISION_SCON_ROCIT) {
_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)
pr_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 (gic_present) {
/* FIXME */
int i;
#if defined(CONFIG_MIPS_MT_SMP)
gic_call_int_base = GIC_NUM_INTRS - NR_CPUS;
gic_resched_int_base = gic_call_int_base - NR_CPUS;
fill_ipi_map();
#endif
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");
}
#if defined(CONFIG_MIPS_MT_SMP)
/* 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 < NR_CPUS; i++) {
arch_init_ipiirq(MIPS_GIC_IRQ_BASE +
GIC_RESCHED_INT(i), &irq_resched);
arch_init_ipiirq(MIPS_GIC_IRQ_BASE +
GIC_CALL_INT(i), &irq_call);
}
#endif
} else {
#if defined(CONFIG_MIPS_MT_SMP)
/* 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;
}
arch_init_ipiirq(cpu_ipi_resched_irq, &irq_resched);
arch_init_ipiirq(cpu_ipi_call_irq, &irq_call);
#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;
}
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