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
16static bool first_fault = true;
17
18static int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr,
19				 struct pt_regs *regs)
20{
21	if (fsr == 0x1c06 && first_fault) {
22		first_fault = false;
23
24		/*
25		 * These faults with code 0x1c06 happens for no good reason,
26		 * possibly left over from the CFE boot loader.
27		 */
28		pr_warn("External imprecise Data abort at addr=%#lx, fsr=%#x ignored.\n",
29		addr, fsr);
30
31		/* Returning non-zero causes fault display and panic */
32		return 0;
33	}
34
35	/* Others should cause a fault */
36	return 1;
37}
38
39static void __init bcm5301x_init_early(void)
40{
41	/* Install our hook */
42	hook_fault_code(16 + 6, bcm5301x_abort_handler, SIGBUS, BUS_OBJERR,
43			"imprecise external abort");
44}
45
46static const char __initconst *bcm5301x_dt_compat[] = {
47	"brcm,bcm4708",
48	NULL,
49};
50
51DT_MACHINE_START(BCM5301X, "BCM5301X")
52	.l2c_aux_val	= 0,
53	.l2c_aux_mask	= ~0,
54	.init_early	= bcm5301x_init_early,
55	.dt_compat	= bcm5301x_dt_compat,
56MACHINE_END
57