diff options
Diffstat (limited to 'src/drivers/pc80/rtc')
| -rw-r--r-- | src/drivers/pc80/rtc/mc146818rtc_boot.c | 68 | ||||
| -rw-r--r-- | src/drivers/pc80/rtc/mc146818rtc_romcc.c | 87 |
2 files changed, 58 insertions, 97 deletions
diff --git a/src/drivers/pc80/rtc/mc146818rtc_boot.c b/src/drivers/pc80/rtc/mc146818rtc_boot.c index 0ac06b3152..3000946413 100644 --- a/src/drivers/pc80/rtc/mc146818rtc_boot.c +++ b/src/drivers/pc80/rtc/mc146818rtc_boot.c @@ -12,17 +12,13 @@ */ #include <stdint.h> -#ifdef __ROMCC__ -#include <arch/cbfs.h> -#else #include <cbfs.h> -#endif #include <pc80/mc146818rtc.h> +#include <fallback.h> #if CONFIG(USE_OPTION_TABLE) #include <option_table.h> #endif -int cmos_error(void); int cmos_error(void) { unsigned char reg_d; @@ -31,7 +27,6 @@ int cmos_error(void) return (reg_d & RTC_VRT) == 0; } -int cmos_chksum_valid(void); int cmos_chksum_valid(void) { #if CONFIG(USE_OPTION_TABLE) @@ -60,12 +55,8 @@ void sanitize_cmos(void) CONFIG(STATIC_OPTION_TABLE)) { size_t length = 128; const unsigned char *cmos_default = -#ifdef __ROMCC__ - walkcbfs("cmos.default"); -#else cbfs_boot_map_with_leak("cmos.default", CBFS_COMPONENT_CMOS_DEFAULT, &length); -#endif if (cmos_default) { size_t i; cmos_disable_rtc(); @@ -76,3 +67,60 @@ void sanitize_cmos(void) } } #endif + +#if CONFIG_MAX_REBOOT_CNT > 15 +#error "CONFIG_MAX_REBOOT_CNT too high" +#endif + +static inline int boot_count(uint8_t rtc_byte) +{ + return rtc_byte >> 4; +} + +static inline uint8_t increment_boot_count(uint8_t rtc_byte) +{ + return rtc_byte + (1 << 4); +} + +static inline uint8_t boot_set_fallback(uint8_t rtc_byte) +{ + return rtc_byte & ~RTC_BOOT_NORMAL; +} + +static inline int boot_use_normal(uint8_t rtc_byte) +{ + return rtc_byte & RTC_BOOT_NORMAL; +} + +int do_normal_boot(void) +{ + unsigned char byte; + + if (cmos_error() || !cmos_chksum_valid()) { + /* Invalid CMOS checksum detected! + * Force fallback boot... + */ + byte = cmos_read(RTC_BOOT_BYTE); + byte &= boot_set_fallback(byte) & 0x0f; + byte |= 0xf << 4; + cmos_write(byte, RTC_BOOT_BYTE); + } + + /* The RTC_BOOT_BYTE is now o.k. see where to go. */ + byte = cmos_read(RTC_BOOT_BYTE); + + /* Are we attempting to boot normally? */ + if (boot_use_normal(byte)) { + /* Are we already at the max count? */ + if (boot_count(byte) < CONFIG_MAX_REBOOT_CNT) + byte = increment_boot_count(byte); + else + byte = boot_set_fallback(byte); + } + + /* Save the boot byte */ + cmos_write(byte, RTC_BOOT_BYTE); + + /* Return selected code path for this boot attempt */ + return boot_use_normal(byte); +} diff --git a/src/drivers/pc80/rtc/mc146818rtc_romcc.c b/src/drivers/pc80/rtc/mc146818rtc_romcc.c deleted file mode 100644 index 4405443501..0000000000 --- a/src/drivers/pc80/rtc/mc146818rtc_romcc.c +++ /dev/null @@ -1,87 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <stdint.h> -#include <pc80/mc146818rtc.h> -#include <fallback.h> - -#include "mc146818rtc_boot.c" - -#if CONFIG_MAX_REBOOT_CNT > 15 -#error "CONFIG_MAX_REBOOT_CNT too high" -#endif - -static inline __attribute__((unused)) int boot_count(uint8_t rtc_byte) -{ - return rtc_byte >> 4; -} - -static inline __attribute__((unused)) uint8_t increment_boot_count(uint8_t rtc_byte) -{ - return rtc_byte + (1 << 4); -} - -static inline __attribute__((unused)) uint8_t boot_set_fallback(uint8_t rtc_byte) -{ - return rtc_byte & ~RTC_BOOT_NORMAL; -} - -static inline __attribute__((unused)) int boot_use_normal(uint8_t rtc_byte) -{ - return rtc_byte & RTC_BOOT_NORMAL; -} - -static inline __attribute__((unused)) int do_normal_boot(void) -{ - unsigned char byte; - - if (cmos_error() || !cmos_chksum_valid()) { - /* Invalid CMOS checksum detected! - * Force fallback boot... - */ - byte = cmos_read(RTC_BOOT_BYTE); - byte &= boot_set_fallback(byte) & 0x0f; - byte |= 0xf << 4; - cmos_write(byte, RTC_BOOT_BYTE); - } - - /* The RTC_BOOT_BYTE is now o.k. see where to go. */ - byte = cmos_read(RTC_BOOT_BYTE); - - /* Are we attempting to boot normally? */ - if (boot_use_normal(byte)) { - /* Are we already at the max count? */ - if (boot_count(byte) < CONFIG_MAX_REBOOT_CNT) - byte = increment_boot_count(byte); - else - byte = boot_set_fallback(byte); - } - - /* Save the boot byte */ - cmos_write(byte, RTC_BOOT_BYTE); - - /* Return selected code path for this boot attempt */ - return boot_use_normal(byte); -} - -unsigned int read_option_lowlevel(unsigned int start, unsigned int size, unsigned int def) -{ -#if CONFIG(USE_OPTION_TABLE) - unsigned int byte; - - byte = cmos_read(start/8); - return (byte >> (start & 7U)) & ((1U << size) - 1U); -#else - return def; -#endif -} |