Hello list,
inside the automatic U-Boot patch tracking system a new ticket [DNX#2006033142000043] was created:
<snip>
Here a patch against u-boot 1.1.4 to support "sleep" mode for mips processors. I tested this feature on Au1100 based board.
The patch add a new define CFG_WAKEUP_MODE and a new per-board function lowlevel_wakeup().
The define is used to mask the new function if you don't need "sleep" support and the lowlevel_wakeup() is needed since the wake up sequence may be different from the boot one.
Regards,
Rodolfo
cpu/mips/start.S | 59 +++++++++++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 53 insertions(+), 6 deletions(-)
Rodolfo Giometti: Support for "sleep" mode added.
diff-tree eb1d649... (from 05d8dce...) Author: Rodolfo Giometti giometti@enneenne.com Date: Fri Mar 31 18:33:38 2006 +0200
Support for "sleep" mode added.diff-tree eb1d6496e7428e5e6e20887bfb5edd6989d2169f (from 05d8dce9d07cf4073ea15fbc448c1ce22b6baf0f) Author: Rodolfo Giometti giometti@zaigor.enneenne.com Date: Fri Mar 31 18:33:38 2006 +0200
Support for "sleep" mode added.diff --git a/cpu/mips/start.S b/cpu/mips/start.S index e91e213..72f17ee 100644 --- a/cpu/mips/start.S +++ b/cpu/mips/start.S @@ -26,6 +26,7 @@ #include <config.h> #include <version.h> #include <asm/regdef.h> +#include <asm/au1x00.h> #include <asm/mipsregs.h>
@@ -252,12 +253,6 @@ reset: nop #endif
- /* Initialize any external memory.
*/- la t9, lowlevel_init
- jalr t9
- nop
- /* Initialize caches... */ la t9, mips_cache_reset
@@ -269,6 +264,58 @@ reset: li t0, CONF_CM_CACHABLE_NONCOHERENT mtc0 t0, CP0_CONFIG
+#ifdef CFG_WAKEUP_MODE
- /* Now check the wakeup cause
*/- li t0, SYS_WAKESRC
- lw t1, 0(t0)
- andi t1, t1, 0x00000002 /* check the SW bit */
- beq zero, t1, 1f
- nop
+#if 0
/* Infinite loop to allow JTAG attach after sleep mode (debugonly)
*/+2: li t1, 0
beq t1, zero, 2b- nop
+#endif
- /* Wakeup any external memory.
*/- la t9, lowlevel_wakeup
- jalr t9
- nop
- /* Jump into the Linux code
*/- li t0, SYS_SCRATCH0
- lw t1, 0(t0)
- move sp, t1
- li t0, SYS_SCRATCH1
- lw t1, 0(t0)
- j t1 /* this cause a jump into already
- nop frozen Linux (brr! :) */
- /* If we reach this point we come from a normal system power up,
so just clear the wakeup cause registers and call the
</snip>
Your U-Boot support team