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| author | Shawn Nematbakhsh <shawnn@chromium.org> | 2015-02-13 15:29:33 -0800 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2015-02-18 04:53:51 +0000 |
| commit | d00847782480e492401ba3bc5a8a8e6f026b08ba (patch) | |
| tree | 01c42b77ba518cf57e7512affcb833f0df61056f /core/cortex-m0/panic.c | |
| parent | 9cb03971f6852fa03df3290e44a8451e01774755 (diff) | |
| download | chrome-ec-d00847782480e492401ba3bc5a8a8e6f026b08ba.tar.gz | |
cortex-m*: Save panicinfo on non-exception panics
Make non-exception "software" panics such as stack overflow and assert
failure save a panic log. Log the panic type in r4, and misc. panic data
in r5 so that panic reasons can be distinguished.
BUG=chrome-os-partner:36744
TEST=Manual on samus_pd. Run 'crash divzero' then 'panicinfo' after
reboot. Verify that panic info is printed with "r4 :dead6660". Trigger
stack overflow, verify that panic info is printed with "r4 :dead6661".
BRANCH=Samus
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Change-Id: I5f7a8eb0a5c2ac5799d29bb241deb24fabf38f68
Reviewed-on: https://chromium-review.googlesource.com/249912
Tested-by: Alec Berg <alecaberg@chromium.org>
Reviewed-by: Alec Berg <alecaberg@chromium.org>
Diffstat (limited to 'core/cortex-m0/panic.c')
| -rw-r--r-- | core/cortex-m0/panic.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/core/cortex-m0/panic.c b/core/cortex-m0/panic.c index 7857fb55dd..2b17a1bd73 100644 --- a/core/cortex-m0/panic.c +++ b/core/cortex-m0/panic.c @@ -166,6 +166,28 @@ void exception_panic(void) ); } +void software_panic(uint32_t panic_reason, uint32_t panic_info) +{ + __asm__("mov " STRINGIFY(SOFTWARE_PANIC_INFO_REG) ", %0\n" + "mov " STRINGIFY(SOFTWARE_PANIC_REASON_REG) ", %1\n" + "bl exception_panic\n" + : : "r"(panic_info), "r"(panic_reason)); +} + +void panic_log_watchdog(void) +{ + uint32_t *lregs = pdata_ptr->cm.regs; + + /* Watchdog reset, log panic cause */ + memset(pdata_ptr, 0, sizeof(*pdata_ptr)); + pdata_ptr->magic = PANIC_DATA_MAGIC; + pdata_ptr->struct_size = sizeof(*pdata_ptr); + pdata_ptr->struct_version = 2; + pdata_ptr->arch = PANIC_ARCH_CORTEX_M; + + lregs[3] = PANIC_SW_WATCHDOG; +} + void bus_fault_handler(void) { if (!bus_fault_ignored) |