/*
 * Broadcom BCM470X / BCM5301X ARM platform code.
 *
 * Copyright 2013 Hauke Mehrtens <hauke@hauke-m.de>
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */

#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