diff options
| author | Duncan Laurie <dlaurie@chromium.org> | 2012-09-09 19:09:56 -0700 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2012-11-08 19:40:40 +0100 |
| commit | b6e97b19ae6a68556838c9801c7824302d72151f (patch) | |
| tree | 0afd66b23e15ca3429134cf061f3ba9e12efc7cd /src/include/pc80 | |
| parent | 31409617a46c5ac6ef1a893d3c478f76ce4d7d3d (diff) | |
Add support for storing POST codes in CMOS
This will use 3 bytes of CMOS to keep track of the POST
code for the current boot while also leaving a record of
the previous boot.
The active bank is switched early in the bootblock.
Test:
1) clear cmos
2) reboot
3) use "mosys nvram dump" to verify that the first byte
contains 0x80 and the second byte contains 0xF8
4) powerd_suspend and then resume
5) use "mosys nvram dump" to verify that the first byte
contains 0x81 and the second byte contains 0xFD
Change-Id: I1ee6bb2dac053018f3042ab5a0b26c435dbfd151
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/1743
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/include/pc80')
| -rw-r--r-- | src/include/pc80/mc146818rtc.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/include/pc80/mc146818rtc.h b/src/include/pc80/mc146818rtc.h index 61b522ca74..edc3241e42 100644 --- a/src/include/pc80/mc146818rtc.h +++ b/src/include/pc80/mc146818rtc.h @@ -158,4 +158,23 @@ static inline int get_option(void *dest __attribute__((unused)), #endif #define read_option(name, default) read_option_lowlevel(CMOS_VSTART_ ##name, CMOS_VLEN_ ##name, (default)) +#if CONFIG_CMOS_POST +#if CONFIG_USE_OPTION_TABLE +# include "option_table.h" +# define CMOS_POST_OFFSET (CMOS_VSTART_cmos_post_offset >> 3) +#else +# if defined(CONFIG_CMOS_POST_OFFSET) +# define CMOS_POST_OFFSET CONFIG_CMOS_POST_OFFSET +# else +# error "Must define CONFIG_CMOS_POST_OFFSET" +# endif +#endif + +#define CMOS_POST_BANK_OFFSET (CMOS_POST_OFFSET) +#define CMOS_POST_BANK_0_MAGIC 0x80 +#define CMOS_POST_BANK_0_OFFSET (CMOS_POST_OFFSET + 1) +#define CMOS_POST_BANK_1_MAGIC 0x81 +#define CMOS_POST_BANK_1_OFFSET (CMOS_POST_OFFSET + 2) +#endif /* CONFIG_CMOS_POST */ + #endif /* PC80_MC146818RTC_H */ |