diff options
| author | Mike Frysinger <vapier@gentoo.org> | 2011-05-29 23:12:51 -0400 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2011-07-23 01:10:43 -0400 |
| commit | fb1d9be5967fff0a3c93b06304fd992e3c438b7f (patch) | |
| tree | 0c1c8a2fe6ad2b9c52bdc4a58e0f396058dc75c3 /arch/blackfin/kernel | |
| parent | 072a5cff2fcaa4648c98bea6d549fac7ee4174fe (diff) | |
Blackfin: optimize double fault boot checking
This moves the double fault data used at boot time into a single struct
which can then easily be addressed with indexed loads rather than having
to explicitly load multiple addresses.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/kernel')
| -rw-r--r-- | arch/blackfin/kernel/asm-offsets.c | 10 | ||||
| -rw-r--r-- | arch/blackfin/kernel/setup.c | 16 |
2 files changed, 19 insertions, 7 deletions
diff --git a/arch/blackfin/kernel/asm-offsets.c b/arch/blackfin/kernel/asm-offsets.c index bd32c09b9349..17e35465a416 100644 --- a/arch/blackfin/kernel/asm-offsets.c +++ b/arch/blackfin/kernel/asm-offsets.c @@ -138,6 +138,16 @@ int main(void) DEFINE(PDA_DF_SEQSTAT, offsetof(struct blackfin_pda, seqstat_doublefault)); DEFINE(PDA_DF_RETX, offsetof(struct blackfin_pda, retx_doublefault)); #endif + + /* PDA initial management */ + DEFINE(PDA_INIT_RETX, offsetof(struct blackfin_initial_pda, retx)); +#ifdef CONFIG_DEBUG_DOUBLEFAULT + DEFINE(PDA_INIT_DF_DCPLB, offsetof(struct blackfin_initial_pda, dcplb_doublefault_addr)); + DEFINE(PDA_INIT_DF_ICPLB, offsetof(struct blackfin_initial_pda, icplb_doublefault_addr)); + DEFINE(PDA_INIT_DF_SEQSTAT, offsetof(struct blackfin_initial_pda, seqstat_doublefault)); + DEFINE(PDA_INIT_DF_RETX, offsetof(struct blackfin_initial_pda, retx_doublefault)); +#endif + #ifdef CONFIG_SMP /* Inter-core lock (in L2 SRAM) */ DEFINE(SIZEOF_CORELOCK, sizeof(struct corelock_slot)); diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 536bd9d7e0cf..dfa2525a442d 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -54,8 +54,7 @@ EXPORT_SYMBOL(mtd_size); #endif char __initdata command_line[COMMAND_LINE_SIZE]; -void __initdata *init_retx, *init_saved_retx, *init_saved_seqstat, - *init_saved_icplb_fault_addr, *init_saved_dcplb_fault_addr; +struct blackfin_initial_pda __initdata initial_pda; /* boot memmap, for parsing "memmap=" */ #define BFIN_MEMMAP_MAX 128 /* number of entries in bfin_memmap */ @@ -957,13 +956,16 @@ void __init setup_arch(char **cmdline_p) 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); + printk(KERN_EMERG " While handling exception (EXCAUSE = %#x) at %pF\n", + initial_pda.seqstat_doublefault & SEQSTAT_EXCAUSE, + initial_pda.retx_doublefault); + printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %pF\n", + initial_pda.dcplb_doublefault_addr); + printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %pF\n", + initial_pda.icplb_doublefault_addr); #endif printk(KERN_NOTICE " The instruction at %pF caused a double exception\n", - init_retx); + initial_pda.retx); } else if (_bfin_swrst & RESET_WDOG) printk(KERN_INFO "Recovering from Watchdog event\n"); else if (_bfin_swrst & RESET_SOFTWARE) |