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 (debug
  

only)

• */
  

+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