apfs/linux-apfs
0
0
Fork 0
mirror of https://github.com/linux-apfs/linux-apfs.git synced 2026-05-01 15:00:59 -07:00
Code Issues Packages Projects Releases Wiki Activity

Blackfin arch: add supporting for double fault debug handling

Browse Source 
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Robin Getz
2008-10-08 16:27:12 +08:00
committed by Bryan Wu
parent f4585a0847
commit 0c7a6b2135
5 changed files with 250 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/blackfin/kernel/setup.c
+20 -10
View File
@@ -52,7 +52,8 @@ EXPORT_SYMBOL(mtd_size);
#endif
char __initdata command_line[COMMAND_LINE_SIZE];
unsigned int __initdata *__retx;
void __initdata *init_retx, *init_saved_retx, *init_saved_seqstat,
*init_saved_icplb_fault_addr, *init_saved_dcplb_fault_addr;
/* boot memmap, for parsing "memmap=" */
#define BFIN_MEMMAP_MAX 128 /* number of entries in bfin_memmap */
@@ -782,16 +783,25 @@ void __init setup_arch(char **cmdline_p)
_bfin_swrst = bfin_read_SWRST();
/* If we double fault, reset the system - otherwise we hang forever */
bfin_write_SWRST(DOUBLE_FAULT);
#ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT
bfin_write_SWRST(_bfin_swrst & ~DOUBLE_FAULT);
#endif
#ifdef CONFIG_DEBUG_DOUBLEFAULT_RESET
bfin_write_SWRST(_bfin_swrst | DOUBLE_FAULT);
#endif
if (_bfin_swrst & RESET_DOUBLE)
/*
* 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 %pF\n", __retx);
else if (_bfin_swrst & RESET_WDOG)
if (_bfin_swrst & RESET_DOUBLE) {
printk(KERN_EMERG "Recovering from DOUBLE FAULT event\n");
#ifdef CONFIG_DEBUG_DOUBLEFAULT
/* We assume the crashing kernel, and the current symbol table match */
printk(KERN_EMERG " While handling exception (EXCAUSE = 0x%x) at %pF\n",
(int)init_saved_seqstat & SEQSTAT_EXCAUSE, init_saved_retx);
printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %pF\n", init_saved_dcplb_fault_addr);
printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %pF\n", init_saved_icplb_fault_addr);
#endif
printk(KERN_NOTICE " The instruction at %pF caused a double exception\n",
init_retx);
} else if (_bfin_swrst & RESET_WDOG)
printk(KERN_INFO "Recovering from Watchdog event\n");
else if (_bfin_swrst & RESET_SOFTWARE)
printk(KERN_NOTICE "Reset caused by Software reset\n");