diff options
| author | Vic Yang <victoryang@chromium.org> | 2012-08-05 22:26:09 +0800 |
|---|---|---|
| committer | Gerrit <chrome-bot@google.com> | 2012-08-08 11:39:48 -0700 |
| commit | a7d7297577d5450610ddc1a76544fe3300873042 (patch) | |
| tree | b49d4b5150dcb543ddc3955a15354c31c9753070 /core | |
| parent | 99a770b14cfd4f1e713623088e0311fc95c2927f (diff) | |
| download | chrome-ec-a7d7297577d5450610ddc1a76544fe3300873042.tar.gz | |
stm32f: Use FLASH_KEYR to lock entire flash
Writing wrong key to FLASH_KEYR locks entire flash and effectively
performs RW_NOW. Therefore we can use this and remove RW_AT_BOOT to
prevent having to reboot for RW to be protected.
BUG=chrome-os-partner:12043
TEST=1. fakewp 1 -> wp_gpio_asserted
2. flashwp now -> nothing happens
2. flashwp enable -> wp_gpio_asserted ro_at_boot
3. reboot -> wp_gpio_asserted ro_at_boot ro_now
4. flasherase 0x10000 0x1000 -> success
5. flashwp now -> wp_gpio_asserted ro_at_boot ro_now rw_now
6. flasherase 0x10000 0x1000 -> error
7. reboot -> wp_gpio_asserted ro_at_boot ro_now
8. flasherase 0x10000 0x1000 -> success
Change-Id: I22df188e31404c190c5830c6d94c9646224eb9ab
Reviewed-on: https://gerrit.chromium.org/gerrit/29255
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Commit-Ready: Vic Yang <victoryang@chromium.org>
Tested-by: Vic Yang <victoryang@chromium.org>
Diffstat (limited to 'core')
| -rw-r--r-- | core/cortex-m/panic.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/core/cortex-m/panic.c b/core/cortex-m/panic.c index 1663d8fd93..26d537ce85 100644 --- a/core/cortex-m/panic.c +++ b/core/cortex-m/panic.c @@ -19,6 +19,9 @@ /* This is the size of our private panic stack, if we have one */ #define STACK_SIZE_WORDS 64 +/* Whether bus fault is ignored */ +static int bus_fault_ignored; + /* We save registers here for display by report_panic() */ static struct save_area { @@ -361,6 +364,20 @@ void exception_panic(void) } +void bus_fault_handler(void) __attribute__((naked)); +void bus_fault_handler(void) +{ + if (!bus_fault_ignored) + exception_panic(); +} + + +void ignore_bus_fault(int ignored) +{ + bus_fault_ignored = ignored; +} + + #ifdef CONFIG_ASSERT_HELP void panic_assert_fail(const char *msg, const char *func, const char *fname, int linenum) |