* 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
This commit is contained in:
committed by
Stefan Reinauer
parent
953253f093
commit
73d5daaf97
@@ -4,16 +4,6 @@
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#include <boot/coreboot_tables.h>
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#include <string.h>
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#define CMOS_READ(addr) ({ \
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outb((addr),RTC_PORT(0)); \
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inb(RTC_PORT(1)); \
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})
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#define CMOS_WRITE(val, addr) ({ \
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outb((addr),RTC_PORT(0)); \
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outb((val),RTC_PORT(1)); \
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})
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/* control registers - Moto names
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*/
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#define RTC_REG_A 10
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@@ -83,7 +73,27 @@ outb((val),RTC_PORT(1)); \
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# define RTC_VRT 0x80 /* valid RAM and time */
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/**********************************************************************/
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static inline unsigned char cmos_read(unsigned char addr)
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{
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int offs = 0;
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if (addr >= 128) {
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offs = 2;
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addr -= 128;
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}
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outb(addr, RTC_BASE_PORT + offs + 0);
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return inb(RTC_BASE_PORT + offs + 1);
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}
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static inline void cmos_write(unsigned char val, unsigned char addr)
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{
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int offs = 0;
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if (addr >= 128) {
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offs = 2;
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addr -= 128;
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}
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outb(addr, RTC_BASE_PORT + offs + 0);
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outb(val, RTC_BASE_PORT + offs + 1);
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}
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static int rtc_checksum_valid(int range_start, int range_end, int cks_loc)
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{
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@@ -91,10 +101,10 @@ static int rtc_checksum_valid(int range_start, int range_end, int cks_loc)
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unsigned sum, old_sum;
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sum = 0;
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for(i = range_start; i <= range_end; i++) {
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sum += CMOS_READ(i);
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sum += cmos_read(i);
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}
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sum = (~sum)&0x0ffff;
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old_sum = ((CMOS_READ(cks_loc)<<8) | CMOS_READ(cks_loc+1))&0x0ffff;
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old_sum = ((cmos_read(cks_loc)<<8) | cmos_read(cks_loc+1))&0x0ffff;
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return sum == old_sum;
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}
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@@ -104,11 +114,11 @@ static void rtc_set_checksum(int range_start, int range_end, int cks_loc)
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unsigned sum;
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sum = 0;
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for(i = range_start; i <= range_end; i++) {
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sum += CMOS_READ(i);
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sum += cmos_read(i);
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}
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sum = ~(sum & 0x0ffff);
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CMOS_WRITE(((sum >> 8) & 0x0ff), cks_loc);
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CMOS_WRITE(((sum >> 0) & 0x0ff), cks_loc+1);
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cmos_write(((sum >> 8) & 0x0ff), cks_loc);
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cmos_write(((sum >> 0) & 0x0ff), cks_loc+1);
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}
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#define RTC_CONTROL_DEFAULT (RTC_24H)
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@@ -130,7 +140,7 @@ void rtc_init(int invalid)
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#if HAVE_OPTION_TABLE
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/* See if there has been a CMOS power problem. */
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x = CMOS_READ(RTC_VALID);
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x = cmos_read(RTC_VALID);
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cmos_invalid = !(x & RTC_VRT);
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/* See if there is a CMOS checksum error */
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@@ -143,31 +153,31 @@ void rtc_init(int invalid)
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cmos_invalid?" Power Problem":"",
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checksum_invalid?" Checksum invalid":"");
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#if 0
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CMOS_WRITE(0, 0x01);
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CMOS_WRITE(0, 0x03);
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CMOS_WRITE(0, 0x05);
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cmos_write(0, 0x01);
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cmos_write(0, 0x03);
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cmos_write(0, 0x05);
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for(i = 10; i < 48; i++) {
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CMOS_WRITE(0, i);
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cmos_write(0, i);
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}
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if (cmos_invalid) {
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/* Now setup a default date of Sat 1 January 2000 */
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CMOS_WRITE(0, 0x00); /* seconds */
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CMOS_WRITE(0, 0x02); /* minutes */
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CMOS_WRITE(1, 0x04); /* hours */
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CMOS_WRITE(7, 0x06); /* day of week */
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CMOS_WRITE(1, 0x07); /* day of month */
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CMOS_WRITE(1, 0x08); /* month */
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CMOS_WRITE(0, 0x09); /* year */
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cmos_write(0, 0x00); /* seconds */
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cmos_write(0, 0x02); /* minutes */
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cmos_write(1, 0x04); /* hours */
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cmos_write(7, 0x06); /* day of week */
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cmos_write(1, 0x07); /* day of month */
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cmos_write(1, 0x08); /* month */
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cmos_write(0, 0x09); /* year */
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}
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#endif
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}
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#endif
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/* Setup the real time clock */
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CMOS_WRITE(RTC_CONTROL_DEFAULT, RTC_CONTROL);
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cmos_write(RTC_CONTROL_DEFAULT, RTC_CONTROL);
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/* Setup the frequency it operates at */
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CMOS_WRITE(RTC_FREQ_SELECT_DEFAULT, RTC_FREQ_SELECT);
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cmos_write(RTC_FREQ_SELECT_DEFAULT, RTC_FREQ_SELECT);
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#if HAVE_OPTION_TABLE
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/* See if there is a LB CMOS checksum error */
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@@ -182,7 +192,7 @@ void rtc_init(int invalid)
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#endif
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/* Clear any pending interrupts */
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(void) CMOS_READ(RTC_INTR_FLAGS);
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(void) cmos_read(RTC_INTR_FLAGS);
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}
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@@ -207,7 +217,7 @@ static int get_cmos_value(unsigned long bit, unsigned long length, void *vret)
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byte=bit/8; /* find the byte where the data starts */
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byte_bit=bit%8; /* find the bit in the byte where the data starts */
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if(length<9) { /* one byte or less */
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uchar = CMOS_READ(byte); /* load the byte */
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uchar = cmos_read(byte); /* load the byte */
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uchar >>= byte_bit; /* shift the bits to byte align */
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/* clear unspecified bits */
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ret[0] = uchar & ((1 << length) -1);
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@@ -215,7 +225,7 @@ static int get_cmos_value(unsigned long bit, unsigned long length, void *vret)
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else { /* more that one byte so transfer the whole bytes */
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for(i=0;length;i++,length-=8,byte++) {
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/* load the byte */
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ret[i]=CMOS_READ(byte);
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ret[i]=cmos_read(byte);
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}
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}
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return 0;
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