diff options
| author | Mike Frysinger <michael.frysinger@analog.com> | 2007-05-21 18:09:26 +0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-21 09:50:22 -0700 |
| commit | ef9256d2831df0896566c3823cd2bdf0e55df984 (patch) | |
| tree | 5a04be14dfc6c213f5ed27e7f7bfd71476ad61d1 /arch/blackfin/mach-bf533 | |
| parent | c0fc525dcc407a516132fc11af82375319ebdadb (diff) | |
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')
| -rw-r--r-- | arch/blackfin/mach-bf533/head.S | 68 |
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: |