diff options
Diffstat (limited to 'arch/arm/mach-bcm/bcm_5301x.c')
| -rw-r--r-- | arch/arm/mach-bcm/bcm_5301x.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/arm/mach-bcm/bcm_5301x.c b/arch/arm/mach-bcm/bcm_5301x.c new file mode 100644 index 000000000..fe067f6ce --- /dev/null +++ b/arch/arm/mach-bcm/bcm_5301x.c @@ -0,0 +1,50 @@ +/* + * Broadcom BCM470X / BCM5301X ARM platform code. + * + * Copyright 2013 Hauke Mehrtens <hauke@hauke-m.de> + * + * Licensed under the GNU/GPL. See COPYING for details. + */ +#include <linux/of_platform.h> +#include <asm/hardware/cache-l2x0.h> + +#include <asm/mach/arch.h> +#include <asm/siginfo.h> +#include <asm/signal.h> + +#define FSR_EXTERNAL (1 << 12) +#define FSR_READ (0 << 10) +#define FSR_IMPRECISE 0x0406 + +static const char *const bcm5301x_dt_compat[] __initconst = { + "brcm,bcm4708", + NULL, +}; + +static int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr, + struct pt_regs *regs) +{ + /* + * We want to ignore aborts forwarded from the PCIe bus that are + * expected and shouldn't really be passed by the PCIe controller. + * The biggest disadvantage is the same FSR code may be reported when + * reading non-existing APB register and we shouldn't ignore that. + */ + if (fsr == (FSR_EXTERNAL | FSR_READ | FSR_IMPRECISE)) + return 0; + + return 1; +} + +static void __init bcm5301x_init_early(void) +{ + hook_fault_code(16 + 6, bcm5301x_abort_handler, SIGBUS, BUS_OBJERR, + "imprecise external abort"); +} + +DT_MACHINE_START(BCM5301X, "BCM5301X") + .l2c_aux_val = 0, + .l2c_aux_mask = ~0, + .dt_compat = bcm5301x_dt_compat, + .init_early = bcm5301x_init_early, +MACHINE_END |