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Blackfin arch: sync reboot handler with version in u-boot 

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Mike Frysinger 2009-02-04 16:49:45 +08:00 committed by Bryan Wu
parent aa9c33b496
commit adab7eb883
1 changed files with 15 additions and 11 deletions
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26
arch/blackfin/kernel/reboot.c
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@ -20,7 +20,7 @@
* reset while the Core B bit (on dual core parts) is cleared by
* the core reset.
*/
__attribute__((l1_text))
__attribute__ ((__l1_text__, __noreturn__))
static void _bfin_reset(void)
{
/* Wait for completion of "system" events such as cache line
@ -30,7 +30,11 @@ static void _bfin_reset(void)
*/
__builtin_bfin_ssync();
while (1) {
/* The bootrom checks to see how it was reset and will
* automatically perform a software reset for us when
* it starts executing after the core reset.
*/
if (ANOMALY_05000353 || ANOMALY_05000386) {
/* Initiate System software reset. */
bfin_write_SWRST(0x7);
@ -50,6 +54,11 @@ static void _bfin_reset(void)
/* Clear System software reset */
bfin_write_SWRST(0);
/* The BF526 ROM will crash during reset */
#if defined(__ADSPBF522__) || defined(__ADSPBF524__) || defined(__ADSPBF526__)
bfin_read_SWRST();
#endif
/* Wait for the SWRST write to complete. Cannot rely on SSYNC
* though as the System state is all reset now.
*/
@ -60,22 +69,17 @@ static void _bfin_reset(void)
: "a" (15 * 1)
: "LC1", "LB1", "LT1"
);
}
while (1)
/* Issue core reset */
asm("raise 1");
}
}
__attribute__ ((__noreturn__))
static void bfin_reset(void)
{
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;");
_bfin_reset();
}
__attribute__((weak))