From f8c905d368c757e2c96db293a472a31abcf4b147 Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Tue, 8 Nov 2005 22:43:05 +0000 Subject: [ARM] 3132/1: S3C2410 - reset on decompression error Patch from Ben Dooks Force a watchdog reset if the system fails to decompress properly. Signed-off-by: Ben Dooks Signed-off-by: Russell King --- arch/arm/boot/compressed/misc.c | 6 ++++++ arch/arm/mach-s3c2410/Kconfig | 8 ++++++++ include/asm-arm/arch-s3c2410/uncompress.h | 22 ++++++++++++++++++++-- 3 files changed, 34 insertions(+), 2 deletions(-) diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c index 50f13eec6cd7..5ab94584baee 100644 --- a/arch/arm/boot/compressed/misc.c +++ b/arch/arm/boot/compressed/misc.c @@ -283,8 +283,14 @@ void flush_window(void) putstr("."); } +#ifndef arch_error +#define arch_error(x) +#endif + static void error(char *x) { + arch_error(x); + putstr("\n\n"); putstr(x); putstr("\n\n -- System halted"); diff --git a/arch/arm/mach-s3c2410/Kconfig b/arch/arm/mach-s3c2410/Kconfig index c796bcdd6158..0b9d7ca49ec1 100644 --- a/arch/arm/mach-s3c2410/Kconfig +++ b/arch/arm/mach-s3c2410/Kconfig @@ -121,6 +121,14 @@ config S3C2410_BOOT_WATCHDOG system resets depends on the value of PCLK. The timeout on an 200MHz s3c2410 should be about 30 seconds. +config S3C2410_BOOT_ERROR_RESET + bool "S3C2410 Reboot on decompression error" + depends on ARCH_S3C2410 + help + Say y here to use the watchdog to reset the system if the + kernel decompressor detects an error during decompression. + + comment "S3C2410 Setup" config S3C2410_DMA diff --git a/include/asm-arm/arch-s3c2410/uncompress.h b/include/asm-arm/arch-s3c2410/uncompress.h index d7a4a8354fa9..ddd1578a7ee0 100644 --- a/include/asm-arm/arch-s3c2410/uncompress.h +++ b/include/asm-arm/arch-s3c2410/uncompress.h @@ -116,6 +116,8 @@ putstr(const char *ptr) } } +#define __raw_writel(d,ad) do { *((volatile unsigned int *)(ad)) = (d); } while(0) + /* CONFIG_S3C2410_BOOT_WATCHDOG * * Simple boot-time watchdog setup, to reboot the system if there is @@ -126,8 +128,6 @@ putstr(const char *ptr) #define WDOG_COUNT (0xff00) -#define __raw_writel(d,ad) do { *((volatile unsigned int *)(ad)) = (d); } while(0) - static inline void arch_decomp_wdog(void) { __raw_writel(WDOG_COUNT, S3C2410_WTCNT); @@ -145,6 +145,24 @@ static void arch_decomp_wdog_start(void) #define arch_decomp_wdog() #endif +#ifdef CONFIG_S3C2410_BOOT_ERROR_RESET + +static void arch_decomp_error(const char *x) +{ + putstr("\n\n"); + putstr(x); + putstr("\n\n -- System resetting\n"); + + __raw_writel(0x4000, S3C2410_WTDAT); + __raw_writel(0x4000, S3C2410_WTCNT); + __raw_writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128 | S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x40), S3C2410_WTCON); + + while(1); +} + +#define arch_error arch_decomp_error +#endif + static void error(char *err); static void -- cgit v1.2.3