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Blackfin arch: cache SWRST value at bootup so other things like watchdog can non-destructively query it 

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Frysinger 2007-05-21 18:09:32 +08:00 committed by Linus Torvalds
parent 19381f024b
commit a9c59c2746
2 changed files with 9 additions and 0 deletions
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8
arch/blackfin/kernel/setup.c
View File

@ -43,6 +43,8 @@
#include <asm/blackfin.h>
#include <asm/cplbinit.h>
u16 _bfin_swrst;
unsigned long memory_start, memory_end, physical_mem_end;
unsigned long reserved_mem_dcache_on;
unsigned long reserved_mem_icache_on;
@ -381,6 +383,12 @@ void __init setup_arch(char **cmdline_p)
if (l1_length > L1_DATA_A_LENGTH)
panic("L1 memory overflow\n");
#ifdef BF561_FAMILY
_bfin_swrst = bfin_read_SICA_SWRST();
#else
_bfin_swrst = bfin_read_SWRST();
#endif
bf53x_cache_init();
printk(KERN_INFO "Hardware Trace Enabled\n");

1
include/asm-blackfin/bfin-global.h
View File

@ -104,6 +104,7 @@ extern unsigned long dpdt_swapcount_table[];
extern unsigned long table_start, table_end;
extern u16 _bfin_swrst; /* shadow for Software Reset Register (SWRST) */
extern struct file_operations dpmc_fops;
extern char _start;
extern unsigned long _ramstart, _ramend, _rambase;