On Wed, 4 Mar 2009, Nicolas Pitre wrote:
> Well, actually the documentation for "halt" says that an argument of 0
> should skip waiting for the halted state. This patch brings the code in
> agreement with the doc.
And on top of the patch above, here's a patch making reset+halt on the
SheevaPlug 100% reliable.
diff --git a/src/target/board/sheevaplug.cfg b/src/target/board/sheevaplug.cfg
index e9c6832..8e5c265 100644
--- a/src/target/board/sheevaplug.cfg
+++ b/src/target/board/sheevaplug.cfg
@@ -3,8 +3,6 @@
source [find interface/sheevaplug.cfg]
source [find target/feroceon.cfg]
-$_TARGETNAME configure -event reset-init { sheevaplug_init }
-
$_TARGETNAME configure \
-work-area-phys 0x10000000 \
-work-area-size 65536 \
@@ -17,6 +15,13 @@ nand device orion 0 0xd8000000
proc sheevaplug_init { } {
+ # We need to assert DBGRQ while holding nSRST down.
+ # However DBGACK will be set only when nSRST is released.
+ jtag_reset 0 1
+ halt 0
+ jtag_reset 0 0
+ wait_halt
+
arm926ejs cp15 0 0 1 0 0x00052078
mww 0xD0001400 0x43000C30 # DDR SDRAM Configuration Register
@@ -90,8 +95,8 @@ proc sheevaplug_init { } {
proc sheevaplug_reflash_uboot { } {
- # reflash the u-Boot binary
- #reset init
+ # reflash the u-Boot binary and reboot into it
+ sheevaplug_init
nand probe 0
nand erase 0 0 4
nand write 0 uboot.bin 0
@@ -101,8 +106,8 @@ proc sheevaplug_reflash_uboot { } {
proc sheevaplug_load_uboot { } {
- # load u-Boot into RAM
- #reset init
+ # load u-Boot into RAM and execute it
+ sheevaplug_init
load_image /tmp/uboot.elf
verify_image uboot.elf
resume 0x00600000
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