diff options
| author | Robin Getz <rgetz@blackfin.uclinux.org> | 2008-08-14 14:44:33 +0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2008-08-14 14:44:33 +0800 |
| commit | cd8fb8df1458df7f3b99fd112e722b05f42c64d9 (patch) | |
| tree | 9cb389a1b61500b6b38752d96b72db23c0590c28 | |
| parent | ee32664da9531329b87aa5109e41e7cc73a04121 (diff) | |
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>
| -rw-r--r-- | arch/blackfin/kernel/setup.c | 7 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/head.S | 6 |
2 files changed, 12 insertions, 1 deletions
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 2ae84fea89e..eb300550e09 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 2c69ad49894..fb7e2d42699 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; |