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>
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index b6ac6f8..02dc743 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -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 @@
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");
diff --git a/include/asm-blackfin/bfin-global.h b/include/asm-blackfin/bfin-global.h
index e37f816..57f37cc 100644
--- a/include/asm-blackfin/bfin-global.h
+++ b/include/asm-blackfin/bfin-global.h
@@ -104,6 +104,7 @@
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;