diff options
Diffstat (limited to 'arch/mips/kernel')
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 20 | ||||
| -rw-r--r-- | arch/mips/kernel/head.S | 5 | ||||
| -rw-r--r-- | arch/mips/kernel/traps.c | 6 |
3 files changed, 30 insertions, 1 deletions
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index 23d8a3b7dd75..c6b8b074a81a 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -186,9 +186,29 @@ static inline void check_wait(void) } } +static inline void check_errata(void) +{ + struct cpuinfo_mips *c = ¤t_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(); } /* diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S index 1f096aa35bc0..f78538eceef7 100644 --- a/arch/mips/kernel/head.S +++ b/arch/mips/kernel/head.S @@ -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 diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 9b19a84d11ef..80ea4fa95bd9 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -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. |