From c3da3fe1d36c58f0d3acbf237f5848dd08dcf016 Mon Sep 17 00:00:00 2001 From: Nico Huber Date: Thu, 11 May 2017 16:40:40 +0200 Subject: drivers/pc80/rtc: Rename mc146818rtc_early.c -> _romcc.c MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit And don't link it. It's for ROMCC. To make code happy that uses the ROMCC interface read_option(), read_option_lowlevel() is ported to mc146818rtc.c along with a message to use get_option() instead. Change-Id: I54ea08de034766c8140b320075d36d5e811582fa Signed-off-by: Nico Huber Reviewed-on: https://review.coreboot.org/19663 Tested-by: build bot (Jenkins) Tested-by: Raptor Engineering Automated Test Stand Reviewed-by: Aaron Durbin Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Paul Menzel --- src/drivers/pc80/rtc/Makefile.inc | 3 - src/drivers/pc80/rtc/mc146818rtc.c | 11 ++++ src/drivers/pc80/rtc/mc146818rtc_early.c | 104 ------------------------------- src/drivers/pc80/rtc/mc146818rtc_romcc.c | 104 +++++++++++++++++++++++++++++++ src/drivers/uart/util.c | 2 +- 5 files changed, 116 insertions(+), 108 deletions(-) delete mode 100644 src/drivers/pc80/rtc/mc146818rtc_early.c create mode 100644 src/drivers/pc80/rtc/mc146818rtc_romcc.c (limited to 'src/drivers') diff --git a/src/drivers/pc80/rtc/Makefile.inc b/src/drivers/pc80/rtc/Makefile.inc index 5edb59bb1a..5d7aef1c1f 100644 --- a/src/drivers/pc80/rtc/Makefile.inc +++ b/src/drivers/pc80/rtc/Makefile.inc @@ -1,9 +1,6 @@ ifeq ($(CONFIG_ARCH_X86),y) -romstage-$(CONFIG_DRIVERS_MC146818) += mc146818rtc_early.c romstage-$(CONFIG_DRIVERS_MC146818) += mc146818rtc.c - -ramstage-$(CONFIG_DRIVERS_MC146818) += mc146818rtc_early.c ramstage-$(CONFIG_DRIVERS_MC146818) += mc146818rtc.c ifeq ($(CONFIG_USE_OPTION_TABLE),y) diff --git a/src/drivers/pc80/rtc/mc146818rtc.c b/src/drivers/pc80/rtc/mc146818rtc.c index a102917d8d..33860b8de3 100644 --- a/src/drivers/pc80/rtc/mc146818rtc.c +++ b/src/drivers/pc80/rtc/mc146818rtc.c @@ -304,6 +304,17 @@ static enum cb_err set_cmos_value(unsigned long bit, unsigned long length, return CB_SUCCESS; } +unsigned int read_option_lowlevel(unsigned int start, unsigned int size, + unsigned int def) +{ + printk(BIOS_NOTICE, "NOTICE: read_option() used to access CMOS " + "from non-ROMCC code, please use get_option() instead.\n"); + if (IS_ENABLED(CONFIG_USE_OPTION_TABLE)) { + const unsigned char byte = cmos_read(start / 8); + return (byte >> (start & 7U)) & ((1U << size) - 1U); + } + return def; +} enum cb_err set_option(const char *name, void *value) { diff --git a/src/drivers/pc80/rtc/mc146818rtc_early.c b/src/drivers/pc80/rtc/mc146818rtc_early.c deleted file mode 100644 index 8bebc4229d..0000000000 --- a/src/drivers/pc80/rtc/mc146818rtc_early.c +++ /dev/null @@ -1,104 +0,0 @@ -#include -#include -#include -#if CONFIG_USE_OPTION_TABLE -#include "option_table.h" -#endif - -#if CONFIG_MAX_REBOOT_CNT > 15 -#error "CONFIG_MAX_REBOOT_CNT too high" -#endif - -static int cmos_error(void) -{ - unsigned char reg_d; - /* See if the cmos error condition has been flagged */ - reg_d = cmos_read(RTC_REG_D); - return (reg_d & RTC_VRT) == 0; -} - -static int cmos_chksum_valid(void) -{ -#if CONFIG_USE_OPTION_TABLE - unsigned char addr; - u16 sum, old_sum; - - sum = 0; - /* Compute the cmos checksum */ - for (addr = LB_CKS_RANGE_START; addr <= LB_CKS_RANGE_END; addr++) - sum += cmos_read(addr); - - /* Read the stored checksum */ - old_sum = cmos_read(LB_CKS_LOC) << 8; - old_sum |= cmos_read(LB_CKS_LOC+1); - - return sum == old_sum; -#else - return 0; -#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 read_option_lowlevel(unsigned start, unsigned size, unsigned def) -{ -#if CONFIG_USE_OPTION_TABLE - unsigned byte; - - byte = cmos_read(start/8); - return (byte >> (start & 7U)) & ((1U << size) - 1U); -#else - return def; -#endif -} diff --git a/src/drivers/pc80/rtc/mc146818rtc_romcc.c b/src/drivers/pc80/rtc/mc146818rtc_romcc.c new file mode 100644 index 0000000000..8bebc4229d --- /dev/null +++ b/src/drivers/pc80/rtc/mc146818rtc_romcc.c @@ -0,0 +1,104 @@ +#include +#include +#include +#if CONFIG_USE_OPTION_TABLE +#include "option_table.h" +#endif + +#if CONFIG_MAX_REBOOT_CNT > 15 +#error "CONFIG_MAX_REBOOT_CNT too high" +#endif + +static int cmos_error(void) +{ + unsigned char reg_d; + /* See if the cmos error condition has been flagged */ + reg_d = cmos_read(RTC_REG_D); + return (reg_d & RTC_VRT) == 0; +} + +static int cmos_chksum_valid(void) +{ +#if CONFIG_USE_OPTION_TABLE + unsigned char addr; + u16 sum, old_sum; + + sum = 0; + /* Compute the cmos checksum */ + for (addr = LB_CKS_RANGE_START; addr <= LB_CKS_RANGE_END; addr++) + sum += cmos_read(addr); + + /* Read the stored checksum */ + old_sum = cmos_read(LB_CKS_LOC) << 8; + old_sum |= cmos_read(LB_CKS_LOC+1); + + return sum == old_sum; +#else + return 0; +#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 read_option_lowlevel(unsigned start, unsigned size, unsigned def) +{ +#if CONFIG_USE_OPTION_TABLE + unsigned byte; + + byte = cmos_read(start/8); + return (byte >> (start & 7U)) & ((1U << size) - 1U); +#else + return def; +#endif +} diff --git a/src/drivers/uart/util.c b/src/drivers/uart/util.c index 86da8dc746..e1b83ba59d 100644 --- a/src/drivers/uart/util.c +++ b/src/drivers/uart/util.c @@ -24,7 +24,7 @@ unsigned int default_baudrate(void) static const unsigned baud[8] = { 115200, 57600, 38400, 19200, 9600, 4800, 2400, 1200 }; unsigned b_index = 0; -#if defined(__PRE_RAM__) +#if defined(__ROMCC__) b_index = read_option(baud_rate, 0xff); #else if (get_option(&b_index, "baud_rate") != CB_SUCCESS) -- cgit v1.2.3