LXR linux/arch/arm/mach-bcm/bcm

   1/*
   2 * Broadcom BCM470X / BCM5301X ARM platform code.
   3 *
   4 * Copyright 2013 Hauke Mehrtens <hauke@hauke-m.de>
   5 *
   6 * Licensed under the GNU/GPL. See COPYING for details.
   7 */
   8#include <linux/of_platform.h>
   9#include <asm/hardware/cache-l2x0.h>
  10
  11#include <asm/mach/arch.h>
  12#include <asm/siginfo.h>
  13#include <asm/signal.h>
  14
  15
  16static bool first_fault = true;
  17
  18static int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr,
  19                                 struct pt_regs *regs)
  20{
  21        if (fsr == 0x1c06 && first_fault) {
  22                first_fault = false;
  23
  24                /*
  25                 * These faults with code 0x1c06 happens for no good reason,
  26                 * possibly left over from the CFE boot loader.
  27                 */
  28                pr_warn("External imprecise Data abort at addr=%#lx, fsr=%#x ignored.\n",
  29                addr, fsr);
  30
  31                /* Returning non-zero causes fault display and panic */
  32                return 0;
  33        }
  34
  35        /* Others should cause a fault */
  36        return 1;
  37}
  38
  39static void __init bcm5301x_init_early(void)
  40{
  41        /* Install our hook */
  42        hook_fault_code(16 + 6, bcm5301x_abort_handler, SIGBUS, BUS_OBJERR,
  43                        "imprecise external abort");
  44}
  45
  46static const char __initconst *bcm5301x_dt_compat[] = {
  47        "brcm,bcm4708",
  48        NULL,
  49};
  50
  51DT_MACHINE_START(BCM5301X, "BCM5301X")
  52        .l2c_aux_val    = 0,
  53        .l2c_aux_mask   = ~0,
  54        .init_early     = bcm5301x_init_early,
  55        .dt_compat      = bcm5301x_dt_compat,
  56MACHINE_END
  57