diff options
| author | Stefan Reinauer <stepan@coresystems.de> | 2009-04-22 09:03:08 +0000 |
|---|---|---|
| committer | Stefan Reinauer <stepan@openbios.org> | 2009-04-22 09:03:08 +0000 |
| commit | 73d5daaf97465776a4ef6ae5c99a5badaeba292b (patch) | |
| tree | eb21aeb759061616ec4892104d010910f5196ab4 /src/pc80/mc146818rtc_early.c | |
| parent | 953253f093302ccee1cc634772a4561ffbe32355 (diff) | |
* Allow coreboot to use the full 256 bytes of CMOS memory
* Make functions out of the accessor macros in mc146818rtc.c
* don't hide reserved cmos entries from coreboot, only from the user.
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4170 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/pc80/mc146818rtc_early.c')
| -rw-r--r-- | src/pc80/mc146818rtc_early.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/src/pc80/mc146818rtc_early.c b/src/pc80/mc146818rtc_early.c index 0c7d822718..83e340c70b 100644 --- a/src/pc80/mc146818rtc_early.c +++ b/src/pc80/mc146818rtc_early.c @@ -10,14 +10,24 @@ static unsigned char cmos_read(unsigned char addr) { - outb(addr, RTC_BASE_PORT + 0); - return inb(RTC_BASE_PORT + 1); + int offs = 0; + if (addr >= 128) { + offs = 2; + addr -= 128; + } + outb(addr, RTC_BASE_PORT + offs + 0); + return inb(RTC_BASE_PORT + offs + 1); } static void cmos_write(unsigned char val, unsigned char addr) { - outb(addr, RTC_BASE_PORT + 0); - outb(val, RTC_BASE_PORT + 1); + int offs = 0; + if (addr >= 128) { + offs = 2; + addr -= 128; + } + outb(addr, RTC_BASE_PORT + offs + 0); + outb(val, RTC_BASE_PORT + offs + 1); } static int cmos_error(void) |