Stefan Reinauer (stefan.reinauer@coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/717 -gerrit commit 0739dfa33e71e00d87ba9fd107a73d9758c9ebb9 Author: Duncan Laurie <dlaurie@chromium.org> Date: Mon Sep 26 13:24:40 2011 -0700 Add cmos helper functions for reading/writing a dword These get used later for saving/restoring the MRC scrambler seed values on each boot. Change-Id: I6e23f17649bea6d22c4b279ed8d0e5cb6c0885e7 Signed-off-by: Duncan Laurie <dlaurie@google.com> --- src/include/pc80/mc146818rtc.h | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-) diff --git a/src/include/pc80/mc146818rtc.h b/src/include/pc80/mc146818rtc.h index 3e5a61a..24dac2c 100644 --- a/src/include/pc80/mc146818rtc.h +++ b/src/include/pc80/mc146818rtc.h @@ -104,6 +104,22 @@ static inline void cmos_write(unsigned char val, unsigned char addr) outb(addr, RTC_BASE_PORT + offs + 0); outb(val, RTC_BASE_PORT + offs + 1); } + +static inline u32 cmos_read32(u8 offset) +{ + u32 value = 0; + u8 i; + for (i = 0; i < sizeof(value); ++i) + value |= cmos_read(offset + i) << (i << 3); + return value; +} + +static inline void cmos_write32(u8 offset, u32 value) +{ + u8 i; + for (i = 0; i < sizeof(value); ++i) + cmos_write((value >> (i << 3)) & 0xff, offset + i); +} #endif #if !defined(__ROMCC__)