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authorMike Frysinger <michael.frysinger@analog.com>2007-05-21 18:09:26 +0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-21 09:50:22 -0700
commitef9256d2831df0896566c3823cd2bdf0e55df984 (patch)
tree5a04be14dfc6c213f5ed27e7f7bfd71476ad61d1 /arch/blackfin/mach-bf533/head.S
parentc0fc525dcc407a516132fc11af82375319ebdadb (diff)
downloadlinux-2.6.34-ux500-ef9256d2831df0896566c3823cd2bdf0e55df984.tar.gz
Blackfin arch: issue reset via SWRST so we dont clobber the watchdog state
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>
Diffstat (limited to 'arch/blackfin/mach-bf533/head.S')
-rw-r--r--arch/blackfin/mach-bf533/head.S68
1 files changed, 16 insertions, 52 deletions
diff --git a/arch/blackfin/mach-bf533/head.S b/arch/blackfin/mach-bf533/head.S
index 7cb8258841d..1a54ff5f061 100644
--- a/arch/blackfin/mach-bf533/head.S
+++ b/arch/blackfin/mach-bf533/head.S
@@ -481,66 +481,30 @@ ENTRY(_bfin_reset)
[p0] = r0;
SSYNC;
- /* Disable the WDOG TIMER */
- p0.h = hi(WDOG_CTL);
- p0.l = lo(WDOG_CTL);
- r0.l = 0xAD6;
- w[p0] = r0.l;
- SSYNC;
-
- /* Clear the sticky bit incase it is already set */
- p0.h = hi(WDOG_CTL);
- p0.l = lo(WDOG_CTL);
- r0.l = 0x8AD6;
- w[p0] = r0.l;
+ /* make sure SYSCR is set to use BMODE */
+ P0.h = hi(SYSCR);
+ P0.l = lo(SYSCR);
+ R0.l = 0x0;
+ W[P0] = R0.l;
SSYNC;
- /* Program the count value */
- R0.l = 0x100;
- R0.h = 0x0;
- P0.h = hi(WDOG_CNT);
- P0.l = lo(WDOG_CNT);
- [P0] = R0;
+ /* issue a system soft reset */
+ P1.h = hi(SWRST);
+ P1.l = lo(SWRST);
+ R1.l = 0x0007;
+ W[P1] = R1;
SSYNC;
- /* Program WDOG_STAT if necessary */
- P0.h = hi(WDOG_CTL);
- P0.l = lo(WDOG_CTL);
- R0 = W[P0](Z);
- CC = BITTST(R0,1);
- if !CC JUMP .LWRITESTAT;
- CC = BITTST(R0,2);
- if !CC JUMP .LWRITESTAT;
- JUMP .LSKIP_WRITE;
-
-.LWRITESTAT:
- /* When watch dog timer is enabled, a write to STAT will load the contents of CNT to STAT */
- R0 = 0x0000(z);
- P0.h = hi(WDOG_STAT);
- P0.l = lo(WDOG_STAT)
- [P0] = R0;
- SSYNC;
-
-.LSKIP_WRITE:
- /* Enable the reset event */
- P0.h = hi(WDOG_CTL);
- P0.l = lo(WDOG_CTL);
- R0 = W[P0](Z);
- BITCLR(R0,1);
- BITCLR(R0,2);
- W[P0] = R0.L;
- SSYNC;
- NOP;
-
- /* Enable the wdog counter */
- R0 = W[P0](Z);
- BITCLR(R0,4);
- W[P0] = R0.L;
+ /* clear system soft reset */
+ R0.l = 0x0000;
+ W[P0] = R0;
SSYNC;
- IDLE;
+ /* issue core reset */
+ raise 1;
RTS;
+ENDPROC(_bfin_reset)
#if CONFIG_DEBUG_KERNEL_START
debug_kernel_start_trap: