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authorRobin Getz <rgetz@blackfin.uclinux.org>2008-08-14 14:44:33 +0800
committerBryan Wu <cooloney@kernel.org>2008-08-14 14:44:33 +0800
commitcd8fb8df1458df7f3b99fd112e722b05f42c64d9 (patch)
tree9cb389a1b61500b6b38752d96b72db23c0590c28 /arch/blackfin
parentee32664da9531329b87aa5109e41e7cc73a04121 (diff)
downloadlinux-linaro-stable-cd8fb8df1458df7f3b99fd112e722b05f42c64d9.tar.gz
Blackfin arch: Print out doublefault addresses, so debug can occur
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/kernel/setup.c7
-rw-r--r--arch/blackfin/mach-common/head.S6
2 files changed, 12 insertions, 1 deletions
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index 2ae84fea89eb..eb300550e093 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -52,6 +52,7 @@ EXPORT_SYMBOL(mtd_size);
#endif
char __initdata command_line[COMMAND_LINE_SIZE];
+unsigned int __initdata *__retx;
/* boot memmap, for parsing "memmap=" */
#define BFIN_MEMMAP_MAX 128 /* number of entries in bfin_memmap */
@@ -785,7 +786,11 @@ void __init setup_arch(char **cmdline_p)
bfin_write_SWRST(DOUBLE_FAULT);
if (_bfin_swrst & RESET_DOUBLE)
- printk(KERN_INFO "Recovering from Double Fault event\n");
+ /*
+ * don't decode the address, since you don't know if this
+ * kernel's symbol map is the same as the crashing kernel
+ */
+ printk(KERN_INFO "Recovering from Double Fault event at %p\n", __retx);
else if (_bfin_swrst & RESET_WDOG)
printk(KERN_INFO "Recovering from Watchdog event\n");
else if (_bfin_swrst & RESET_SOFTWARE)
diff --git a/arch/blackfin/mach-common/head.S b/arch/blackfin/mach-common/head.S
index 2c69ad49894e..fb7e2d426999 100644
--- a/arch/blackfin/mach-common/head.S
+++ b/arch/blackfin/mach-common/head.S
@@ -90,6 +90,12 @@ ENTRY(__start)
[p0] = R0;
SSYNC;
+ /* Save RETX, in case of doublefault */
+ p0.l = ___retx;
+ p0.h = ___retx;
+ R0 = RETX;
+ [P0] = R0;
+
/* Let each Blackfin family do its own thing */
call _mach_early_start;