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Diffstat (limited to 'arch/blackfin/kernel/reboot.c')
-rw-r--r--arch/blackfin/kernel/reboot.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/arch/blackfin/kernel/reboot.c b/arch/blackfin/kernel/reboot.c
index 367e2dc09881..ae97ca407b0d 100644
--- a/arch/blackfin/kernel/reboot.c
+++ b/arch/blackfin/kernel/reboot.c
@@ -10,6 +10,7 @@
#include <asm/bfin-global.h>
#include <asm/reboot.h>
#include <asm/system.h>
+#include <asm/bfrom.h>
/* A system soft reset makes external memory unusable so force
* this function into L1. We use the compiler ssync here rather
@@ -20,7 +21,7 @@
* the core reset.
*/
__attribute__((l1_text))
-void bfin_reset(void)
+static void bfin_reset(void)
{
/* Wait for completion of "system" events such as cache line
* line fills so that we avoid infinite stalls later on as
@@ -34,15 +35,15 @@ void bfin_reset(void)
bfin_write_SWRST(0x7);
/* Due to the way reset is handled in the hardware, we need
- * to delay for 7 SCLKS. The only reliable way to do this is
- * to calculate the CCLK/SCLK ratio and multiply 7. For now,
+ * to delay for 10 SCLKS. The only reliable way to do this is
+ * to calculate the CCLK/SCLK ratio and multiply 10. For now,
* we'll assume worse case which is a 1:15 ratio.
*/
asm(
"LSETUP (1f, 1f) LC0 = %0\n"
"1: nop;"
:
- : "a" (15 * 7)
+ : "a" (15 * 10)
: "LC0", "LB0", "LT0"
);
@@ -74,7 +75,14 @@ void machine_restart(char *cmd)
{
native_machine_restart(cmd);
local_irq_disable();
- bfin_reset();
+ if (ANOMALY_05000353 || ANOMALY_05000386)
+ bfin_reset();
+ else
+ /* the bootrom checks to see how it was reset and will
+ * automatically perform a software reset for us when
+ * it starts executing boot
+ */
+ asm("raise 1;");
}
__attribute__((weak))