| /* |
| * 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 |
