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66d3ad0170
Now that the panic stack goes at the end of RAM, there's no overhead to using it on all platforms. When it was a dedicated block of memory, we needed to turn it off on some low-RAM platforms (e.g. Snow). BUG=chrome-os-partner:7466 TEST='crash divzero' or 'crash unaligned'; should print dump and reboot BRANCH=all Change-Id: Iddfeb134e237538215df51abe4e16ee831b3ae2d Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/32037 Reviewed-by: Simon Glass <sjg@chromium.org>
69 lines
2.1 KiB
Plaintext
69 lines
2.1 KiB
Plaintext
- EC Lib
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This wraps Blizzard driverlib and implements the EC chip interface defined
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by Google. See below diagram for architecture.
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+--------------------+
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| Host BIOS/OS |
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+--------------------+
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---- host interface ----
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+--------------------+
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| Google EC features |
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+--------------------+
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---- chip interface ---- The interface is defined in
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src/platform/ec/chip_interface/*.
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+--------------------+ But the real implementation is in EC Lib.
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| EC Lib |
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+--------------------+
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| Blizzard low level |
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| driver, the |
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| driverlib. |
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+--------------------+
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Build Options
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=============
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- CONFIG_WATCHDOG_HELP
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Try to detect a watchdog that is about to fire, and print a trace.
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This is needed on STM32, where the independent watchdog has no early
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warning feature and the windowed watchdog has a very short period.
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- CONFIG_PANIC_HELP
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Report extra information about a panic, such as the fault address,
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here shown as bfar. This shows the reason for the fault and may help
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to determine the cause.
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=== EXCEPTION: 03 ====== xPSR: 01000000 ===========
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r0 :0000000b r1 :00000047 r2 :60000000 r3 :200013dd
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r4 :00000000 r5 :080053f4 r6 :200013d0 r7 :00000002
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r8 :00000000 r9 :200013de r10:00000000 r11:00000000
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r12:00000000 sp :200009a0 lr :08002b85 pc :08003a8a
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Precise data bus error, Forced hard fault, Vector catch, bfar = 60000000
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mmfs = 00008200, shcsr = 00000000, hfsr = 40000000, dfsr = 00000008
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- CONFIG_ASSERT_HELP
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Report assertion failures in a vebose manner to aid debugging. When
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enabled an ASSERT() which fails will produce message in the form:
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ASSERTION FAILURE '<expr>' in function() at file:line
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- CONFIG_CONFIGURE_BOARD_LATE
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Define this to call configure_board_late() after initial system init
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is complete (and after GPIOs are set up).
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- CONFIG_AC_POWER_STATUS
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Monitor the state of the AC power input and drive out a GPIO to
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the AP indicating this state. The GPIO will be driven low when
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AC power is not connected, and high when it is connected. This
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uses GPIO_AC_STATUS for this purpose.
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