bcm53xx: remove linux 3.14 support

[openwrt/svn-archive/archive.git] / target / linux / bcm53xx / patches-3.14 / 042-ARM-BCM5301X-workaround-suppress-fault.patch

diff --git a/target/linux/bcm53xx/patches-3.14/042-ARM-BCM5301X-workaround-suppress-fault.patch b/target/linux/bcm53xx/patches-3.14/042-ARM-BCM5301X-workaround-suppress-fault.patch
deleted file mode 100644 (file)
index 41a9dd1..0000000
--- a/target/linux/bcm53xx/patches-3.14/042-ARM-BCM5301X-workaround-suppress-fault.patch
+++ /dev/null
@@ -1,93 +0,0 @@
-From fdf4850cb5b2e5e549a18b8b41abb001bfb19e9c Mon Sep 17 00:00:00 2001
-From: Hauke Mehrtens <hauke@hauke-m.de>
-Date: Tue, 4 Feb 2014 00:01:46 +0100
-Subject: [PATCH 3/3] ARM: BCM5301X: workaround suppress fault
-
-Without this patch I am getting a unhandled fault exception like this
-one after "Freeing unused kernel memory":
-
-Freeing unused kernel memory: 1260K (c02c1000 - c03fc000)
-Unhandled fault: imprecise external abort (0x1c06) at 0xb6f89005
-Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000007
-
-The address which is here 0xb6f89005 changes from boot to boot, with a
-new build the changes are bigger. With kernel 3.10 I have also seen
-this fault at different places in the boot process, but starting with
-3.11 they are always occurring after the "Freeing unused kernel memory"
-message. I never was able to completely boot to userspace without this
-handler. The abort code is constant 0x1c06. This fault just happens
-once in the boot process I have never seen it happing twice or more.
-
-I also tried changing the CPSR.A bit to 0 in init_early, with this code
-like Afzal suggested, but that did not change anything:
-asm volatile("mrs r12, cpsr\n"
-       "bic r12, r12, #0x00000100\n"
-       "msr cpsr_c, r12" ::: "r12", "cc", "memory");
-
-Disabling the L2 cache by building with CONFIG_CACHE_L2X0 unset did not
-help.
-
-This workaround was copied from the vendor code including most of the
-comments. It says it they think this is caused by the CFE boot loader
-used on this device. I do not have any access to any datasheet or
-errata document to check this.
-
-Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
-Acked-by: Arnd Bergmann <arnd@arndb.de>
-Acked-by: Christian Daudt <bcm@fixthebug.org>
-Signed-off-by: Matt Porter <mporter@linaro.org>
----
- arch/arm/mach-bcm/bcm_5301x.c |   33 +++++++++++++++++++++++++++++++++
- 1 file changed, 33 insertions(+)
-
---- a/arch/arm/mach-bcm/bcm_5301x.c
-+++ b/arch/arm/mach-bcm/bcm_5301x.c
-@@ -9,8 +9,40 @@
- #include <asm/hardware/cache-l2x0.h>
- 
- #include <asm/mach/arch.h>
-+#include <asm/siginfo.h>
-+#include <asm/signal.h>
- 
- 
-+static bool first_fault = true;
-+
-+static int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr,
-+                               struct pt_regs *regs)
-+{
-+      if (fsr == 0x1c06 && first_fault) {
-+              first_fault = false;
-+
-+              /*
-+               * These faults with code 0x1c06 happens for no good reason,
-+               * possibly left over from the CFE boot loader.
-+               */
-+              pr_warn("External imprecise Data abort at addr=%#lx, fsr=%#x ignored.\n",
-+              addr, fsr);
-+
-+              /* Returning non-zero causes fault display and panic */
-+              return 0;
-+      }
-+
-+      /* Others should cause a fault */
-+      return 1;
-+}
-+
-+static void __init bcm5301x_init_early(void)
-+{
-+      /* Install our hook */
-+      hook_fault_code(16 + 6, bcm5301x_abort_handler, SIGBUS, BUS_OBJERR,
-+                      "imprecise external abort");
-+}
-+
- static void __init bcm5301x_dt_init(void)
- {
-       l2x0_of_init(0, ~0UL);
-@@ -23,6 +55,7 @@ static const char __initconst *bcm5301x_
- };
- 
- DT_MACHINE_START(BCM5301X, "BCM5301X")
-+      .init_early     = bcm5301x_init_early,
-       .init_machine   = bcm5301x_dt_init,
-       .dt_compat      = bcm5301x_dt_compat,
- MACHINE_END