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We squeeze 2 bytes out of fakewp backup register so that we would have full 16 bytes for VbNvContext. As fakewp will go away real soon and it needs just 1 bits, we move it to saved reset flags register's most significant bit, which is currently unused. Signed-off-by: Che-Liang Chiou <clchiou@chromium.org> BRANCH=snow BUG=chrome-os-partner:10660,13094 TEST=manual Make sure reset flags are still preserved: 1. reset with keyboard. flags -> reset-pin 2. trigger watchdog reset. flags -> reset-pin watchdog 3. 'reboot soft preserve' flags -> reset-pin watchdog soft 4. trigger watchdog reset. flags -> reset-pin watchdog 5. 'reboot soft' flags -> reset-pin soft Make sure fakewp is still preserved: 1. 'flashinfo' -> no flags 2. 'fakewp 1' -> 'wp_gpio_asserted' 3. 'flashwp enable' -> 'wp_gpio_asserted ro_at_boot' 4. 'reboot' -> 'wp_gpio_asserted ro_at_boot ro_now' 5. 'fakewp 0' -> 'ro_at_boot ro_now' 6. 'reboot' -> 'ro_at_boot' 7. 'fakewp 1' -> 'wp_gpio_asserted ro_at_boot' 8. 'flashwp rw' -> 'wp_gpio_asserted ro_at_boot rw_at_boot' 9. 'reboot' -> 'wp_gpio_asserted ro_at_boot ro_now rw_at_boot rw_now' 10.'flashwp disable'-> error 7 11.'flashwp norw' -> 'wp_gpio_asserted ro_at_boot ro_now rw_now' 12.'reboot' -> 'wp_gpio_asserted ro_at_boot ro_now' Change-Id: Ibb7dc8aa224d3226bbaac217e494565e448b5858 Reviewed-on: https://gerrit.chromium.org/gerrit/32041 Commit-Ready: Che-Liang Chiou <clchiou@chromium.org> Tested-by: Che-Liang Chiou <clchiou@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org>
- EC Lib
This wraps Blizzard driverlib and implements the EC chip interface defined
by Google. See below diagram for architecture.
+--------------------+
| Host BIOS/OS |
+--------------------+
---- host interface ----
+--------------------+
| Google EC features |
+--------------------+
---- chip interface ---- The interface is defined in
src/platform/ec/chip_interface/*.
+--------------------+ But the real implementation is in EC Lib.
| EC Lib |
+--------------------+
| Blizzard low level |
| driver, the |
| driverlib. |
+--------------------+
Build Options
=============
- CONFIG_WATCHDOG_HELP
Try to detect a watchdog that is about to fire, and print a trace.
This is needed on STM32, where the independent watchdog has no early
warning feature and the windowed watchdog has a very short period.
- CONFIG_PANIC_HELP
Report extra information about a panic, such as the fault address,
here shown as bfar. This shows the reason for the fault and may help
to determine the cause.
=== EXCEPTION: 03 ====== xPSR: 01000000 ===========
r0 :0000000b r1 :00000047 r2 :60000000 r3 :200013dd
r4 :00000000 r5 :080053f4 r6 :200013d0 r7 :00000002
r8 :00000000 r9 :200013de r10:00000000 r11:00000000
r12:00000000 sp :200009a0 lr :08002b85 pc :08003a8a
Precise data bus error, Forced hard fault, Vector catch, bfar = 60000000
mmfs = 00008200, shcsr = 00000000, hfsr = 40000000, dfsr = 00000008
- CONFIG_ASSERT_HELP
Report assertion failures in a vebose manner to aid debugging. When
enabled an ASSERT() which fails will produce message in the form:
ASSERTION FAILURE '<expr>' in function() at file:line
- CONFIG_CONFIGURE_BOARD_LATE
Define this to call configure_board_late() after initial system init
is complete (and after GPIOs are set up).
- CONFIG_AC_POWER_STATUS
Monitor the state of the AC power input and drive out a GPIO to
the AP indicating this state. The GPIO will be driven low when
AC power is not connected, and high when it is connected. This
uses GPIO_AC_STATUS for this purpose.