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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>
#define FSR_EXTERNAL (1 << 12)
#define FSR_READ (0 << 10)
#define FSR_IMPRECISE 0x0406
static const char *const bcm5301x_dt_compat[] __initconst = {
"brcm,bcm4708",
NULL,
};
static int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr,
struct pt_regs *regs)
{
/*
* We want to ignore aborts forwarded from the PCIe bus that are
* expected and shouldn't really be passed by the PCIe controller.
* The biggest disadvantage is the same FSR code may be reported when
* reading non-existing APB register and we shouldn't ignore that.
*/
if (fsr == (FSR_EXTERNAL | FSR_READ | FSR_IMPRECISE))
return 0;
return 1;
}
static void __init bcm5301x_init_early(void)
{
hook_fault_code(16 + 6, bcm5301x_abort_handler, SIGBUS, BUS_OBJERR,
"imprecise external abort");
}
DT_MACHINE_START(BCM5301X, "BCM5301X")
.l2c_aux_val = 0,
.l2c_aux_mask = ~0,
.dt_compat = bcm5301x_dt_compat,
.init_early = bcm5301x_init_early,
MACHINE_END
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