Merge remote-tracking branches 'asoc/topic/tegra', 'asoc/topic/tlv320aic23', 'asoc...
[linux-2.6-microblaze.git] / arch / arm / mach-bcm / bcm_5301x.c
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>
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
18
19 static const char *const bcm5301x_dt_compat[] __initconst = {
20         "brcm,bcm4708",
21         NULL,
22 };
23
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
45 DT_MACHINE_START(BCM5301X, "BCM5301X")
46         .l2c_aux_val    = 0,
47         .l2c_aux_mask   = ~0,
48         .dt_compat      = bcm5301x_dt_compat,
49         .init_early     = bcm5301x_init_early,
50 MACHINE_END