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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>
This commit is contained in:
Robin Getz 2008-08-14 14:44:33 +08:00 committed by Bryan Wu
parent ee32664da9
commit cd8fb8df14
2 changed files with 12 additions and 1 deletions
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7
arch/blackfin/kernel/setup.c
View File

@ -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)

6
arch/blackfin/mach-common/head.S
View File

@ -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;