[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>
mariux64 · Nov 13, 2009 · 2bf3010 · 2bf3010
1 parent 156171c
commit 2bf3010
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diff --git 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
@@ -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