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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 |