162306a36Sopenharmony_ci/*
262306a36Sopenharmony_ci * Broadcom BCM470X / BCM5301X ARM platform code.
362306a36Sopenharmony_ci *
462306a36Sopenharmony_ci * Copyright 2013 Hauke Mehrtens <hauke@hauke-m.de>
562306a36Sopenharmony_ci *
662306a36Sopenharmony_ci * Licensed under the GNU/GPL. See COPYING for details.
762306a36Sopenharmony_ci */
862306a36Sopenharmony_ci
962306a36Sopenharmony_ci#include <asm/mach/arch.h>
1062306a36Sopenharmony_ci#include <asm/siginfo.h>
1162306a36Sopenharmony_ci#include <asm/signal.h>
1262306a36Sopenharmony_ci
1362306a36Sopenharmony_ci#define FSR_EXTERNAL		(1 << 12)
1462306a36Sopenharmony_ci#define FSR_READ		(0 << 10)
1562306a36Sopenharmony_ci#define FSR_IMPRECISE		0x0406
1662306a36Sopenharmony_ci
1762306a36Sopenharmony_cistatic const char *const bcm5301x_dt_compat[] __initconst = {
1862306a36Sopenharmony_ci	"brcm,bcm4708",
1962306a36Sopenharmony_ci	NULL,
2062306a36Sopenharmony_ci};
2162306a36Sopenharmony_ci
2262306a36Sopenharmony_cistatic int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr,
2362306a36Sopenharmony_ci				  struct pt_regs *regs)
2462306a36Sopenharmony_ci{
2562306a36Sopenharmony_ci	/*
2662306a36Sopenharmony_ci	 * We want to ignore aborts forwarded from the PCIe bus that are
2762306a36Sopenharmony_ci	 * expected and shouldn't really be passed by the PCIe controller.
2862306a36Sopenharmony_ci	 * The biggest disadvantage is the same FSR code may be reported when
2962306a36Sopenharmony_ci	 * reading non-existing APB register and we shouldn't ignore that.
3062306a36Sopenharmony_ci	 */
3162306a36Sopenharmony_ci	if (fsr == (FSR_EXTERNAL | FSR_READ | FSR_IMPRECISE))
3262306a36Sopenharmony_ci		return 0;
3362306a36Sopenharmony_ci
3462306a36Sopenharmony_ci	return 1;
3562306a36Sopenharmony_ci}
3662306a36Sopenharmony_ci
3762306a36Sopenharmony_cistatic void __init bcm5301x_init_early(void)
3862306a36Sopenharmony_ci{
3962306a36Sopenharmony_ci	hook_fault_code(16 + 6, bcm5301x_abort_handler, SIGBUS, BUS_OBJERR,
4062306a36Sopenharmony_ci			"imprecise external abort");
4162306a36Sopenharmony_ci}
4262306a36Sopenharmony_ci
4362306a36Sopenharmony_ciDT_MACHINE_START(BCM5301X, "BCM5301X")
4462306a36Sopenharmony_ci	.l2c_aux_val	= 0,
4562306a36Sopenharmony_ci	.l2c_aux_mask	= ~0,
4662306a36Sopenharmony_ci	.dt_compat	= bcm5301x_dt_compat,
4762306a36Sopenharmony_ci	.init_early	= bcm5301x_init_early,
4862306a36Sopenharmony_ciMACHINE_END
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