projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 5b293ebe HM |
1 | /* |
| 2 | * Broadcom BCM470X / BCM5301X ARM platform code. | |
| 3 | * | |
| 4 | * Copyright 2013 Hauke Mehrtens <hauke@hauke-m.de> | |
| 5 | * | |
| 6 | * Licensed under the GNU/GPL. See COPYING for details. | |
| 7 | */ | |
| 8 | #include <linux/of_platform.h> | |
| 9 | #include <asm/hardware/cache-l2x0.h> | |
| 10 | ||
| 11 | #include <asm/mach/arch.h> | |
| 09f3510f RM |
12 | #include <asm/siginfo.h> |
| 13 | #include <asm/signal.h> | |
| 14 | ||
| 15 | #define FSR_EXTERNAL (1 << 12) | |
| 16 | #define FSR_READ (0 << 10) | |
| 17 | #define FSR_IMPRECISE 0x0406 | |
| fdf4850c | 18 | |
| 19c233b7 | 19 | static const char *const bcm5301x_dt_compat[] __initconst = { |
| 5b293ebe HM |
20 | "brcm,bcm4708", |
| 21 | NULL, | |
| 22 | }; | |
| 23 | ||
| 09f3510f RM |
24 | static int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr, |
| 25 | struct pt_regs *regs) | |
| 26 | { | |
| 27 | /* | |
| 28 | * We want to ignore aborts forwarded from the PCIe bus that are | |
| 29 | * expected and shouldn't really be passed by the PCIe controller. | |
| 30 | * The biggest disadvantage is the same FSR code may be reported when | |
| 31 | * reading non-existing APB register and we shouldn't ignore that. | |
| 32 | */ | |
| 33 | if (fsr == (FSR_EXTERNAL | FSR_READ | FSR_IMPRECISE)) | |
| 34 | return 0; | |
| 35 | ||
| 36 | return 1; | |
| 37 | } | |
| 38 | ||
| 39 | static void __init bcm5301x_init_early(void) | |
| 40 | { | |
| 41 | hook_fault_code(16 + 6, bcm5301x_abort_handler, SIGBUS, BUS_OBJERR, | |
| 42 | "imprecise external abort"); | |
| 43 | } | |
| 44 | ||
| 5b293ebe | 45 | DT_MACHINE_START(BCM5301X, "BCM5301X") |
| d458773f RK |
46 | .l2c_aux_val = 0, |
| 47 | .l2c_aux_mask = ~0, | |
| 5b293ebe | 48 | .dt_compat = bcm5301x_dt_compat, |
| 09f3510f | 49 | .init_early = bcm5301x_init_early, |
| 5b293ebe | 50 | MACHINE_END |