/*
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* Broadcom BCM470X / BCM5301X ARM platform code.
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*
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* Copyright 2013 Hauke Mehrtens <hauke@hauke-m.de>
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*
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* Licensed under the GNU/GPL. See COPYING for details.
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*/
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#include <linux/of_platform.h>
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#include <asm/hardware/cache-l2x0.h>
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#include <asm/mach/arch.h>
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#include <asm/siginfo.h>
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#include <asm/signal.h>
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#define FSR_EXTERNAL (1 << 12)
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#define FSR_READ (0 << 10)
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#define FSR_IMPRECISE 0x0406
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static const char *const bcm5301x_dt_compat[] __initconst = {
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"brcm,bcm4708",
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NULL,
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};
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static int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr,
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struct pt_regs *regs)
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{
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/*
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* We want to ignore aborts forwarded from the PCIe bus that are
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* expected and shouldn't really be passed by the PCIe controller.
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* The biggest disadvantage is the same FSR code may be reported when
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* reading non-existing APB register and we shouldn't ignore that.
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*/
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if (fsr == (FSR_EXTERNAL | FSR_READ | FSR_IMPRECISE))
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return 0;
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return 1;
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}
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static void __init bcm5301x_init_early(void)
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{
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hook_fault_code(16 + 6, bcm5301x_abort_handler, SIGBUS, BUS_OBJERR,
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"imprecise external abort");
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}
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DT_MACHINE_START(BCM5301X, "BCM5301X")
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.l2c_aux_val = 0,
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.l2c_aux_mask = ~0,
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.dt_compat = bcm5301x_dt_compat,
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.init_early = bcm5301x_init_early,
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MACHINE_END
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