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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm/mach-bcm/bcm_5301x.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-bcm/bcm_5301x.c')
-rw-r--r--arch/arm/mach-bcm/bcm_5301x.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/arm/mach-bcm/bcm_5301x.c b/arch/arm/mach-bcm/bcm_5301x.c
new file mode 100644
index 0000000000..cd29496da1
--- /dev/null
+++ b/arch/arm/mach-bcm/bcm_5301x.c
@@ -0,0 +1,48 @@
+/*
+ * 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