| /* |
| * 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> |
| |
| |
| static bool first_fault = true; |
| |
| static int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr, |
| struct pt_regs *regs) |
| { |
| if ((fsr == 0x1406 || fsr == 0x1c06) && first_fault) { |
| first_fault = false; |
| |
| /* |
| * These faults with codes 0x1406 (BCM4709) or 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 const char *const bcm5301x_dt_compat[] __initconst = { |
| "brcm,bcm4708", |
| NULL, |
| }; |
| |
| DT_MACHINE_START(BCM5301X, "BCM5301X") |
| .l2c_aux_val = 0, |
| .l2c_aux_mask = ~0, |
| .init_early = bcm5301x_init_early, |
| .dt_compat = bcm5301x_dt_compat, |
| MACHINE_END |
