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| author | Randall Spangler <rspangler@chromium.org> | 2012-07-16 14:19:59 -0700 |
|---|---|---|
| committer | Gerrit <chrome-bot@google.com> | 2012-07-16 17:49:10 -0700 |
| commit | acf6f963a160f045d6b4c58f0ee3e249ded76b4e (patch) | |
| tree | 1c724e7480104f9fa1284f6a3f013cbd44501c12 /include/flash.h | |
| parent | a42edb86c59cbc145eb99bd5b65bbd1f5567320e (diff) | |
| download | chrome-ec-acf6f963a160f045d6b4c58f0ee3e249ded76b4e.tar.gz | |
Flash pre-init reboots if it needs to clear protection registers
BUG=chrome-os-partner:11171
TEST=manual
1. Clear some of the writable-bits in the flash registers
> ww 0x400fe40c 0xffff1234
write 0x400fe40c = 0xffff1234
> rw 0x400fe40c
read 0x400fe40c = 0xffff1234
2. Reset using power+refresh
3. Register should be clear again
> rw 0x400fe40c
read 0x400fe40c = 0xffffffff
4. Sysinfo should indicate reset-pin reason AND hard-reset reason
> sysinfo
Reset flags: 0x0000000a (reset-pin power-on)
5. Reset using power+refresh
6. Sysinfo should indicate reset-pin reason only
> sysinfo
Reset flags: 0x00000002 (reset-pin)
7. Clear writable-bits again
> ww 0x400fe40c 0xffff1234
write 0x400fe40c = 0xffff1234
8. Jump to another image. This should NOT trigger a hard reset.
> sysjump A
> sysinfo
Reset flags: 0x00000402 (reset-pin sysjump)
Change-Id: Ie1d6af2acc68217bb82faae464798ee85d63d1ea
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/27540
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Diffstat (limited to 'include/flash.h')
| -rw-r--r-- | include/flash.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/flash.h b/include/flash.h index 3dcce216c6..2ad8581440 100644 --- a/include/flash.h +++ b/include/flash.h @@ -14,6 +14,11 @@ /*****************************************************************************/ /* Low-level methods, for use by flash_common. */ +/** + * Initialize the physical flash interface. + */ +int flash_physical_pre_init(void); + /* Return the write / erase / protect block size, in bytes. Operations must be * aligned to and multiples of the granularity. For example, erase operations * must have offset and size which are multiples of the erase block size. */ |