| Hauke Mehrtens | 5b293eb | 2014-02-04 00:01:43 +0100 | [diff] [blame] | 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> |
| Rafał Miłecki | 5ed56ca | 2016-10-29 13:12:29 +0200 | [diff] [blame] | 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 |
| Hauke Mehrtens | fdf4850 | 2014-02-04 00:01:46 +0100 | [diff] [blame] | 18 | |
| Nicolas Pitre | 19c233b | 2015-07-27 18:27:52 -0400 | [diff] [blame] | 19 | static const char *const bcm5301x_dt_compat[] __initconst = { |
| Hauke Mehrtens | 5b293eb | 2014-02-04 00:01:43 +0100 | [diff] [blame] | 20 | "brcm,bcm4708", |
| 21 | NULL, |
| 22 | }; |
| 23 | |
| Rafał Miłecki | 5ed56ca | 2016-10-29 13:12:29 +0200 | [diff] [blame] | 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 | |
| Hauke Mehrtens | 5b293eb | 2014-02-04 00:01:43 +0100 | [diff] [blame] | 45 | DT_MACHINE_START(BCM5301X, "BCM5301X") |
| Russell King | d458773f | 2014-04-28 15:27:59 +0100 | [diff] [blame] | 46 | .l2c_aux_val = 0, |
| 47 | .l2c_aux_mask = ~0, |
| Hauke Mehrtens | 5b293eb | 2014-02-04 00:01:43 +0100 | [diff] [blame] | 48 | .dt_compat = bcm5301x_dt_compat, |
| Rafał Miłecki | 5ed56ca | 2016-10-29 13:12:29 +0200 | [diff] [blame] | 49 | .init_early = bcm5301x_init_early, |
| Hauke Mehrtens | 5b293eb | 2014-02-04 00:01:43 +0100 | [diff] [blame] | 50 | MACHINE_END |