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System-specific handling of bus errors for DECstation variations

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supporting parity errors only for memory (Pmax/3min/Maxine).
Fixes for resources decoded by the KN04/KN05 MB ASIC.  Additional
clean-ups for the ECC handler.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Maciej W. Rozycki
2005-06-22 20:56:26 +00:00
committed by Ralf Baechle
parent 3b2396d972
commit 64dac503e8
9 changed files with 121 additions and 70 deletions
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31
arch/mips/dec/ecc-berr.c
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@@ -6,7 +6,7 @@
* 5000/240 (KN03), 5000/260 (KN05) and DECsystem 5900 (KN03),
* 5900/260 (KN05) systems.
*
* Copyright (c) 2003 Maciej W. Rozycki
* Copyright (c) 2003, 2005 Maciej W. Rozycki
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -15,6 +15,7 @@
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
@@ -57,7 +58,7 @@ static int dec_ecc_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
const char *kind, *agent, *cycle, *event;
const char *status = "", *xbit = "", *fmt = "";
dma_addr_t address;
unsigned long address;
u16 syn = 0, sngl;
int i = 0;
@@ -66,7 +67,7 @@ static int dec_ecc_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
u32 chksyn = *kn0x_chksyn;
int action = MIPS_BE_FATAL;
/* For non-ECC ack ASAP, so any subsequent errors get caught. */
/* For non-ECC ack ASAP, so that any subsequent errors get caught. */
if ((erraddr & (KN0X_EAR_VALID | KN0X_EAR_ECCERR)) == KN0X_EAR_VALID)
dec_ecc_be_ack();
@@ -74,7 +75,7 @@ static int dec_ecc_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
if (!(erraddr & KN0X_EAR_VALID)) {
/* No idea what happened. */
printk(KERN_ALERT "Unidentified bus error %s.\n", kind);
printk(KERN_ALERT "Unidentified bus error %s\n", kind);
return action;
}
@@ -126,7 +127,7 @@ static int dec_ecc_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
/* Ack now, no rewrite will happen. */
dec_ecc_be_ack();
fmt = KERN_ALERT "%s" "invalid.\n";
fmt = KERN_ALERT "%s" "invalid\n";
} else {
sngl = syn & KN0X_ESR_SNGLO;
syn &= KN0X_ESR_SYNLO;
@@ -161,12 +162,12 @@ static int dec_ecc_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
if (syn == 0x01) {
fmt = KERN_ALERT "%s"
"%#04x -- %s bit error "
"at check bit C%s.\n";
"at check bit C%s\n";
xbit = "X";
} else {
fmt = KERN_ALERT "%s"
"%#04x -- %s bit error "
"at check bit C%s%u.\n";
"at check bit C%s%u\n";
}
i = syn >> 2;
} else {
@@ -176,16 +177,16 @@ static int dec_ecc_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
if (i < 32)
fmt = KERN_ALERT "%s"
"%#04x -- %s bit error "
"at data bit D%s%u.\n";
"at data bit D%s%u\n";
else
fmt = KERN_ALERT "%s"
"%#04x -- %s bit error.\n";
"%#04x -- %s bit error\n";
}
}
}
if (action != MIPS_BE_FIXUP)
printk(KERN_ALERT "Bus error %s: %s %s %s at %#010lx.\n",
printk(KERN_ALERT "Bus error %s: %s %s %s at %#010lx\n",
kind, agent, cycle, event, address);
if (action != MIPS_BE_FIXUP && erraddr & KN0X_EAR_ECCERR)
@@ -207,8 +208,8 @@ irqreturn_t dec_ecc_be_interrupt(int irq, void *dev_id, struct pt_regs *regs)
return IRQ_HANDLED;
/*
* FIXME: Find affected processes and kill them, otherwise we
* must die.
* FIXME: Find the affected processes and kill them, otherwise
* we must die.
*
* The interrupt is asynchronously delivered thus EPC and RA
* may be irrelevant, but are printed for a reference.
@@ -235,7 +236,7 @@ static inline void dec_kn02_be_init(void)
spin_lock_irqsave(&kn02_lock, flags);
/* Preset write-only bits of the Control Register cache. */
cached_kn02_csr = *csr | KN03_CSR_LEDS;
cached_kn02_csr = *csr | KN02_CSR_LEDS;
/* Set normal ECC detection and generation. */
cached_kn02_csr &= ~(KN02_CSR_DIAGCHK | KN02_CSR_DIAGGEN);
@@ -250,7 +251,7 @@ static inline void dec_kn02_be_init(void)
static inline void dec_kn03_be_init(void)
{
volatile u32 *mcr = (void *)(KN03_SLOT_BASE + IOASIC_MCR);
volatile u32 *mbcs = (void *)(KN03_SLOT_BASE + KN05_MB_CSR);
volatile u32 *mbcs = (void *)(KN4K_SLOT_BASE + KN4K_MB_CSR);
kn0x_erraddr = (void *)(KN03_SLOT_BASE + IOASIC_ERRADDR);
kn0x_chksyn = (void *)(KN03_SLOT_BASE + IOASIC_CHKSYN);
@@ -265,7 +266,7 @@ static inline void dec_kn03_be_init(void)
*mcr = (*mcr & ~(KN03_MCR_DIAGCHK | KN03_MCR_DIAGGEN)) |
KN03_MCR_CORRECT;
if (current_cpu_data.cputype == CPU_R4400SC)
*mbcs |= KN05_MB_CSR_EE;
*mbcs |= KN4K_MB_CSR_EE;
fast_iob();
}