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authorLennert Buytenhek <buytenh@wantstofly.org>2009-11-12 20:31:14 +0100
committerNicolas Pitre <nico@fluxnic.net>2009-11-13 12:14:23 -0500
commit2bf30108435339c4cf149f9d279d0dc961345393 (patch)
tree28f15de12bc1db42a7b77c6b5544e8584dc84c89 /arch/arm
parent156171c71a0dc4bce12b4408bb1591f8fe32dc1a (diff)
downloadop-kernel-dev-2bf30108435339c4cf149f9d279d0dc961345393.zip
op-kernel-dev-2bf30108435339c4cf149f9d279d0dc961345393.tar.gz
[ARM] Kirkwood: disable propagation of mbus error to the CPU local bus
Disable propagation of mbus errors to the CPU local bus, as this causes mbus errors (which can occur for example for PCI aborts) to throw CPU aborts, which we're not set up to deal with. Reported-by: Dieter Kiermaier <dk-arm-linux@gmx.de> Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: Nicolas Pitre <nico@marvell.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-kirkwood/common.c8
-rw-r--r--arch/arm/mach-kirkwood/include/mach/bridge-regs.h3
2 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c
index 7177c4a..242dd07 100644
--- a/arch/arm/mach-kirkwood/common.c
+++ b/arch/arm/mach-kirkwood/common.c
@@ -915,6 +915,14 @@ void __init kirkwood_init(void)
kirkwood_uart0_data[0].uartclk = kirkwood_tclk;
kirkwood_uart1_data[0].uartclk = kirkwood_tclk;
+ /*
+ * Disable propagation of mbus errors to the CPU local bus,
+ * as this causes mbus errors (which can occur for example
+ * for PCI aborts) to throw CPU aborts, which we're not set
+ * up to deal with.
+ */
+ writel(readl(CPU_CONFIG) & ~CPU_CONFIG_ERROR_PROP, CPU_CONFIG);
+
kirkwood_setup_cpu_mbus();
#ifdef CONFIG_CACHE_FEROCEON_L2
diff --git a/arch/arm/mach-kirkwood/include/mach/bridge-regs.h b/arch/arm/mach-kirkwood/include/mach/bridge-regs.h
index 9e80d92..418f501 100644
--- a/arch/arm/mach-kirkwood/include/mach/bridge-regs.h
+++ b/arch/arm/mach-kirkwood/include/mach/bridge-regs.h
@@ -13,6 +13,9 @@
#include <mach/kirkwood.h>
+#define CPU_CONFIG (BRIDGE_VIRT_BASE | 0x0100)
+#define CPU_CONFIG_ERROR_PROP 0x00000004
+
#define CPU_CONTROL (BRIDGE_VIRT_BASE | 0x0104)
#define CPU_RESET 0x00000002
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