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kernel add
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/*
* Broadcom BCM470X / BCM5301X ARM platform code.
*
* Copyright 2013 Hauke Mehrtens <hauke@hauke-m.de>
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include <linux/of_platform.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach/arch.h>
#include <asm/siginfo.h>
#include <asm/signal.h>
static bool first_fault = true;
static int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr,
struct pt_regs *regs)
{
if ((fsr == 0x1406 || fsr == 0x1c06) && first_fault) {
first_fault = false;
/*
* These faults with codes 0x1406 (BCM4709) or 0x1c06 happens
* for no good reason, possibly left over from the CFE boot
* loader.
*/
pr_warn("External imprecise Data abort at addr=%#lx, fsr=%#x ignored.
",
addr, fsr);
/* Returning non-zero causes fault display and panic */
return 0;
}
/* Others should cause a fault */
return 1;
}
static void __init bcm5301x_init_early(void)
{
/* Install our hook */
hook_fault_code(16 + 6, bcm5301x_abort_handler, SIGBUS, BUS_OBJERR,
"imprecise external abort");
}
static const char *const bcm5301x_dt_compat[] __initconst = {
"brcm,bcm4708",
NULL,
};
DT_MACHINE_START(BCM5301X, "BCM5301X")
.l2c_aux_val = 0,
.l2c_aux_mask = ~0,
.init_early = bcm5301x_init_early,
.dt_compat = bcm5301x_dt_compat,
MACHINE_END
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