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[MIPS] PMC MSP71xx mips common

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Patch to add mips common support for the PMC-Sierra MSP71xx devices.

Signed-off-by: Marc St-Jean <Marc_St-Jean@pmc-sierra.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Marc St-Jean
2007-06-14 15:55:31 -06:00
committed by Ralf Baechle
parent 35832e26f9
commit 9267a30d1d
10 changed files with 179 additions and 2 deletions
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20
arch/mips/kernel/cpu-probe.c
View File

@@ -186,9 +186,29 @@ static inline void check_wait(void)
}
}
static inline void check_errata(void)
{
struct cpuinfo_mips *c = &current_cpu_data;
switch (c->cputype) {
case CPU_34K:
/*
* Erratum "RPS May Cause Incorrect Instruction Execution"
* This code only handles VPE0, any SMP/SMTC/RTOS code
* making use of VPE1 will be responsable for that VPE.
*/
if ((c->processor_id & PRID_REV_MASK) <= PRID_REV_34K_V1_0_2)
write_c0_config7(read_c0_config7() | MIPS_CONF7_RPS);
break;
default:
break;
}
}
void __init check_bugs32(void)
{
check_wait();
check_errata();
}
/*

5
arch/mips/kernel/head.S
View File

@@ -16,6 +16,7 @@
#include <linux/init.h>
#include <linux/threads.h>
#include <asm/addrspace.h>
#include <asm/asm.h>
#include <asm/asmmacro.h>
#include <asm/irqflags.h>
@@ -129,16 +130,18 @@
#endif
.endm
#ifndef CONFIG_NO_EXCEPT_FILL
/*
* Reserved space for exception handlers.
* Necessary for machines which link their kernels at KSEG0.
*/
.fill 0x400
#endif
EXPORT(stext) # used for profiling
EXPORT(_stext)
#ifndef CONFIG_MIPS_SIM
#ifdef CONFIG_BOOT_RAW
/*
* Give us a fighting chance of running if execution beings at the
* kernel load address. This is needed because this platform does

6
arch/mips/kernel/traps.c
View File

@@ -69,6 +69,7 @@ extern asmlinkage void handle_reserved(void);
extern int fpu_emulator_cop1Handler(struct pt_regs *xcp,
struct mips_fpu_struct *ctx, int has_fpu);
void (*board_watchpoint_handler)(struct pt_regs *regs);
void (*board_be_init)(void);
int (*board_be_handler)(struct pt_regs *regs, int is_fixup);
void (*board_nmi_handler_setup)(void);
@@ -833,6 +834,11 @@ asmlinkage void do_mdmx(struct pt_regs *regs)
asmlinkage void do_watch(struct pt_regs *regs)
{
if (board_watchpoint_handler) {
(*board_watchpoint_handler)(regs);
return;
}
/*
* We use the watch exception where available to detect stack
* overflows.