diff options
Diffstat (limited to 'arch/arm/mach-bcm/bcm_5301x.c')
| -rw-r--r-- | arch/arm/mach-bcm/bcm_5301x.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/arm/mach-bcm/bcm_5301x.c b/arch/arm/mach-bcm/bcm_5301x.c index ef9740a20883..edff69761e04 100644 --- a/arch/arm/mach-bcm/bcm_5301x.c +++ b/arch/arm/mach-bcm/bcm_5301x.c @@ -9,8 +9,40 @@ #include <asm/hardware/cache-l2x0.h> #include <asm/mach/arch.h> +#include <asm/siginfo.h> +#include <asm/signal.h> +static bool first_fault = true; + +static int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr, + struct pt_regs *regs) +{ + if (fsr == 0x1c06 && first_fault) { + first_fault = false; + + /* + * These faults with code 0x1c06 happens for no good reason, + * possibly left over from the CFE boot loader. + */ + pr_warn("External imprecise Data abort at addr=%#lx, fsr=%#x ignored.\n", + addr, fsr); + + /* Returning non-zero causes fault display and panic */ + return 0; + } + + /* Others should cause a fault */ + return 1; +} + +static void __init bcm5301x_init_early(void) +{ + /* Install our hook */ + hook_fault_code(16 + 6, bcm5301x_abort_handler, SIGBUS, BUS_OBJERR, + "imprecise external abort"); +} + static void __init bcm5301x_dt_init(void) { l2x0_of_init(0, ~0UL); @@ -23,6 +55,7 @@ static const char __initconst *bcm5301x_dt_compat[] = { }; DT_MACHINE_START(BCM5301X, "BCM5301X") + .init_early = bcm5301x_init_early, .init_machine = bcm5301x_dt_init, .dt_compat = bcm5301x_dt_compat, MACHINE_END |