diff options
Diffstat (limited to 'src/drivers/pc80/rtc')
| -rw-r--r-- | src/drivers/pc80/rtc/Makefile.inc | 3 | ||||
| -rw-r--r-- | src/drivers/pc80/rtc/mc146818rtc.c | 228 | ||||
| -rw-r--r-- | src/drivers/pc80/rtc/option.c | 235 |
3 files changed, 238 insertions, 228 deletions
diff --git a/src/drivers/pc80/rtc/Makefile.inc b/src/drivers/pc80/rtc/Makefile.inc index 749306bfba..95b25d6c19 100644 --- a/src/drivers/pc80/rtc/Makefile.inc +++ b/src/drivers/pc80/rtc/Makefile.inc @@ -8,6 +8,9 @@ romstage-$(CONFIG_DRIVERS_MC146818) += mc146818rtc.c ramstage-$(CONFIG_DRIVERS_MC146818) += mc146818rtc.c smm-$(CONFIG_DRIVERS_MC146818) += mc146818rtc.c +all-$(CONFIG_USE_OPTION_TABLE) += option.c +smm-$(CONFIG_USE_OPTION_TABLE) += option.c + ifeq ($(CONFIG_USE_OPTION_TABLE),y) cbfs-files-$(CONFIG_HAVE_CMOS_DEFAULT) += cmos.default cmos.default-file = $(CONFIG_CMOS_DEFAULT_FILE):nvramtool diff --git a/src/drivers/pc80/rtc/mc146818rtc.c b/src/drivers/pc80/rtc/mc146818rtc.c index ee61a6c22d..23f2db3556 100644 --- a/src/drivers/pc80/rtc/mc146818rtc.c +++ b/src/drivers/pc80/rtc/mc146818rtc.c @@ -26,18 +26,6 @@ #include <security/vboot/vbnv_layout.h> #include <types.h> -/* There's no way around this include guard. option_table.h is autogenerated */ -#if CONFIG(USE_OPTION_TABLE) -#include "option_table.h" -#else -#define LB_CKS_RANGE_START 0 -#define LB_CKS_RANGE_END 0 -#define LB_CKS_LOC 0 -#endif - -/* Don't warn for checking >= LB_CKS_RANGE_START even though it may be 0. */ -#pragma GCC diagnostic ignored "-Wtype-limits" - static void cmos_reset_date(void) { /* Now setup a default date equals to the build date */ @@ -191,222 +179,6 @@ void cmos_init(bool invalid) } /* - * This routine returns the value of the requested bits. - * input bit = bit count from the beginning of the cmos image - * length = number of bits to include in the value - * ret = a character pointer to where the value is to be returned - * returns CB_SUCCESS = successful, cb_err code if an error occurred - */ -static enum cb_err get_cmos_value(unsigned long bit, unsigned long length, - void *vret) -{ - unsigned char *ret; - unsigned long byte, byte_bit; - unsigned long i; - unsigned char uchar; - - /* - * The table is checked when it is built to ensure all - * values are valid. - */ - ret = vret; - byte = bit / 8; /* find the byte where the data starts */ - byte_bit = bit % 8; /* find the bit in the byte where the data starts */ - if (length < 9) { /* one byte or less */ - uchar = cmos_read(byte); /* load the byte */ - uchar >>= byte_bit; /* shift the bits to byte align */ - /* clear unspecified bits */ - ret[0] = uchar & ((1 << length) - 1); - } else { /* more than one byte so transfer the whole bytes */ - for (i = 0; length; i++, length -= 8, byte++) { - /* load the byte */ - ret[i] = cmos_read(byte); - } - } - return CB_SUCCESS; -} - -static enum cb_err locate_cmos_layout(struct region_device *rdev) -{ - uint32_t cbfs_type = CBFS_COMPONENT_CMOS_LAYOUT; - MAYBE_STATIC_BSS struct cbfsf fh = {}; - - /* - * In case VBOOT is enabled and this function is called from SMM, - * we have multiple CMOS layout files and to locate them we'd need to - * include VBOOT into SMM... - * - * Support only one CMOS layout in the 'COREBOOT' region for now. - */ - if (!region_device_sz(&(fh.data))) { - if (cbfs_locate_file_in_region(&fh, "COREBOOT", "cmos_layout.bin", - &cbfs_type)) { - printk(BIOS_ERR, "RTC: cmos_layout.bin could not be found. " - "Options are disabled\n"); - return CB_CMOS_LAYOUT_NOT_FOUND; - } - } - - cbfs_file_data(rdev, &fh); - - return CB_SUCCESS; -} - -enum cb_err cmos_get_option(void *dest, const char *name) -{ - struct cmos_option_table *ct; - struct region_device rdev; - struct cmos_entries *ce; - size_t namelen; - int found = 0; - - if (!CONFIG(USE_OPTION_TABLE)) - return CB_CMOS_OTABLE_DISABLED; - - /* Figure out how long name is */ - namelen = strnlen(name, CMOS_MAX_NAME_LENGTH); - - if (locate_cmos_layout(&rdev) != CB_SUCCESS) { - return CB_CMOS_LAYOUT_NOT_FOUND; - } - ct = rdev_mmap_full(&rdev); - if (!ct) { - printk(BIOS_ERR, "RTC: cmos_layout.bin could not be mapped. " - "Options are disabled\n"); - - return CB_CMOS_LAYOUT_NOT_FOUND; - } - - /* find the requested entry record */ - ce = (struct cmos_entries *)((unsigned char *)ct + ct->header_length); - for (; ce->tag == LB_TAG_OPTION; - ce = (struct cmos_entries *)((unsigned char *)ce + ce->size)) { - if (memcmp(ce->name, name, namelen) == 0) { - found = 1; - break; - } - } - if (!found) { - printk(BIOS_DEBUG, "No CMOS option '%s'.\n", name); - rdev_munmap(&rdev, ct); - return CB_CMOS_OPTION_NOT_FOUND; - } - - if (!cmos_checksum_valid(LB_CKS_RANGE_START, LB_CKS_RANGE_END, LB_CKS_LOC)) { - rdev_munmap(&rdev, ct); - return CB_CMOS_CHECKSUM_INVALID; - } - if (get_cmos_value(ce->bit, ce->length, dest) != CB_SUCCESS) { - rdev_munmap(&rdev, ct); - return CB_CMOS_ACCESS_ERROR; - } - rdev_munmap(&rdev, ct); - return CB_SUCCESS; -} - -static enum cb_err set_cmos_value(unsigned long bit, unsigned long length, - void *vret) -{ - unsigned char *ret; - unsigned long byte, byte_bit; - unsigned long i; - unsigned char uchar, mask; - unsigned int chksum_update_needed = 0; - - ret = vret; - byte = bit / 8; /* find the byte where the data starts */ - byte_bit = bit % 8; /* find the bit where the data starts */ - if (length <= 8) { /* one byte or less */ - mask = (1 << length) - 1; - mask <<= byte_bit; - - uchar = cmos_read(byte); - uchar &= ~mask; - uchar |= (ret[0] << byte_bit); - cmos_write(uchar, byte); - if (byte >= LB_CKS_RANGE_START && byte <= LB_CKS_RANGE_END) - chksum_update_needed = 1; - } else { /* more that one byte so transfer the whole bytes */ - if (byte_bit || length % 8) - return CB_ERR_ARG; - - for (i = 0; length; i++, length -= 8, byte++) { - cmos_write(ret[i], byte); - if (byte >= LB_CKS_RANGE_START && - byte <= LB_CKS_RANGE_END) - chksum_update_needed = 1; - } - } - - if (chksum_update_needed) { - cmos_set_checksum(LB_CKS_RANGE_START, LB_CKS_RANGE_END, - LB_CKS_LOC); - } - return CB_SUCCESS; -} - -enum cb_err cmos_set_option(const char *name, void *value) -{ - struct cmos_option_table *ct; - struct region_device rdev; - struct cmos_entries *ce; - unsigned long length; - size_t namelen; - int found = 0; - - if (!CONFIG(USE_OPTION_TABLE)) - return CB_CMOS_OTABLE_DISABLED; - - /* Figure out how long name is */ - namelen = strnlen(name, CMOS_MAX_NAME_LENGTH); - - if (locate_cmos_layout(&rdev) != CB_SUCCESS) { - return CB_CMOS_LAYOUT_NOT_FOUND; - } - ct = rdev_mmap_full(&rdev); - if (!ct) { - printk(BIOS_ERR, "RTC: cmos_layout.bin could not be mapped. " - "Options are disabled\n"); - - return CB_CMOS_LAYOUT_NOT_FOUND; - } - - /* find the requested entry record */ - ce = (struct cmos_entries *)((unsigned char *)ct + ct->header_length); - for (; ce->tag == LB_TAG_OPTION; - ce = (struct cmos_entries *)((unsigned char *)ce + ce->size)) { - if (memcmp(ce->name, name, namelen) == 0) { - found = 1; - break; - } - } - if (!found) { - printk(BIOS_DEBUG, "WARNING: No CMOS option '%s'.\n", name); - rdev_munmap(&rdev, ct); - return CB_CMOS_OPTION_NOT_FOUND; - } - - length = ce->length; - if (ce->config == 's') { - length = MAX(strlen((const char *)value) * 8, ce->length - 8); - /* make sure the string is null terminated */ - if (set_cmos_value(ce->bit + ce->length - 8, 8, &(u8[]){0}) - != CB_SUCCESS) { - rdev_munmap(&rdev, ct); - return CB_CMOS_ACCESS_ERROR; - } - } - - if (set_cmos_value(ce->bit, length, value) != CB_SUCCESS) { - rdev_munmap(&rdev, ct); - return CB_CMOS_ACCESS_ERROR; - } - - rdev_munmap(&rdev, ct); - return CB_SUCCESS; -} - -/* * Upon return the caller is guaranteed 244 microseconds to complete any * RTC operations. wait_uip may be called a single time prior to multiple * accesses, but sequences requiring more time should call wait_uip again. diff --git a/src/drivers/pc80/rtc/option.c b/src/drivers/pc80/rtc/option.c new file mode 100644 index 0000000000..c7851e5357 --- /dev/null +++ b/src/drivers/pc80/rtc/option.c @@ -0,0 +1,235 @@ +/* + * 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 <console/console.h> +#include <string.h> +#include <cbfs.h> +#include <option.h> +#include <pc80/mc146818rtc.h> +#include <types.h> + +/* option_table.h is autogenerated */ +#include "option_table.h" + +/* Don't warn for checking >= LB_CKS_RANGE_START even though it may be 0. */ +#pragma GCC diagnostic ignored "-Wtype-limits" + +/* + * This routine returns the value of the requested bits. + * input bit = bit count from the beginning of the cmos image + * length = number of bits to include in the value + * ret = a character pointer to where the value is to be returned + * returns CB_SUCCESS = successful, cb_err code if an error occurred + */ +static enum cb_err get_cmos_value(unsigned long bit, unsigned long length, + void *vret) +{ + unsigned char *ret; + unsigned long byte, byte_bit; + unsigned long i; + unsigned char uchar; + + /* + * The table is checked when it is built to ensure all + * values are valid. + */ + ret = vret; + byte = bit / 8; /* find the byte where the data starts */ + byte_bit = bit % 8; /* find the bit in the byte where the data starts */ + if (length < 9) { /* one byte or less */ + uchar = cmos_read(byte); /* load the byte */ + uchar >>= byte_bit; /* shift the bits to byte align */ + /* clear unspecified bits */ + ret[0] = uchar & ((1 << length) - 1); + } else { /* more than one byte so transfer the whole bytes */ + for (i = 0; length; i++, length -= 8, byte++) { + /* load the byte */ + ret[i] = cmos_read(byte); + } + } + return CB_SUCCESS; +} + +static enum cb_err locate_cmos_layout(struct region_device *rdev) +{ + uint32_t cbfs_type = CBFS_COMPONENT_CMOS_LAYOUT; + MAYBE_STATIC_BSS struct cbfsf fh = {}; + + /* + * In case VBOOT is enabled and this function is called from SMM, + * we have multiple CMOS layout files and to locate them we'd need to + * include VBOOT into SMM... + * + * Support only one CMOS layout in the 'COREBOOT' region for now. + */ + if (!region_device_sz(&(fh.data))) { + if (cbfs_locate_file_in_region(&fh, "COREBOOT", "cmos_layout.bin", + &cbfs_type)) { + printk(BIOS_ERR, "RTC: cmos_layout.bin could not be found. " + "Options are disabled\n"); + return CB_CMOS_LAYOUT_NOT_FOUND; + } + } + + cbfs_file_data(rdev, &fh); + + return CB_SUCCESS; +} + +enum cb_err cmos_get_option(void *dest, const char *name) +{ + struct cmos_option_table *ct; + struct region_device rdev; + struct cmos_entries *ce; + size_t namelen; + int found = 0; + + /* Figure out how long name is */ + namelen = strnlen(name, CMOS_MAX_NAME_LENGTH); + + if (locate_cmos_layout(&rdev) != CB_SUCCESS) { + return CB_CMOS_LAYOUT_NOT_FOUND; + } + ct = rdev_mmap_full(&rdev); + if (!ct) { + printk(BIOS_ERR, "RTC: cmos_layout.bin could not be mapped. " + "Options are disabled\n"); + + return CB_CMOS_LAYOUT_NOT_FOUND; + } + + /* find the requested entry record */ + ce = (struct cmos_entries *)((unsigned char *)ct + ct->header_length); + for (; ce->tag == LB_TAG_OPTION; + ce = (struct cmos_entries *)((unsigned char *)ce + ce->size)) { + if (memcmp(ce->name, name, namelen) == 0) { + found = 1; + break; + } + } + if (!found) { + printk(BIOS_DEBUG, "No CMOS option '%s'.\n", name); + rdev_munmap(&rdev, ct); + return CB_CMOS_OPTION_NOT_FOUND; + } + + if (!cmos_checksum_valid(LB_CKS_RANGE_START, LB_CKS_RANGE_END, LB_CKS_LOC)) { + rdev_munmap(&rdev, ct); + return CB_CMOS_CHECKSUM_INVALID; + } + if (get_cmos_value(ce->bit, ce->length, dest) != CB_SUCCESS) { + rdev_munmap(&rdev, ct); + return CB_CMOS_ACCESS_ERROR; + } + rdev_munmap(&rdev, ct); + return CB_SUCCESS; +} + +static enum cb_err set_cmos_value(unsigned long bit, unsigned long length, + void *vret) +{ + unsigned char *ret; + unsigned long byte, byte_bit; + unsigned long i; + unsigned char uchar, mask; + unsigned int chksum_update_needed = 0; + + ret = vret; + byte = bit / 8; /* find the byte where the data starts */ + byte_bit = bit % 8; /* find the bit where the data starts */ + if (length <= 8) { /* one byte or less */ + mask = (1 << length) - 1; + mask <<= byte_bit; + + uchar = cmos_read(byte); + uchar &= ~mask; + uchar |= (ret[0] << byte_bit); + cmos_write(uchar, byte); + if (byte >= LB_CKS_RANGE_START && byte <= LB_CKS_RANGE_END) + chksum_update_needed = 1; + } else { /* more that one byte so transfer the whole bytes */ + if (byte_bit || length % 8) + return CB_ERR_ARG; + + for (i = 0; length; i++, length -= 8, byte++) { + cmos_write(ret[i], byte); + if (byte >= LB_CKS_RANGE_START && + byte <= LB_CKS_RANGE_END) + chksum_update_needed = 1; + } + } + + if (chksum_update_needed) { + cmos_set_checksum(LB_CKS_RANGE_START, LB_CKS_RANGE_END, + LB_CKS_LOC); + } + return CB_SUCCESS; +} + +enum cb_err cmos_set_option(const char *name, void *value) +{ + struct cmos_option_table *ct; + struct region_device rdev; + struct cmos_entries *ce; + unsigned long length; + size_t namelen; + int found = 0; + + /* Figure out how long name is */ + namelen = strnlen(name, CMOS_MAX_NAME_LENGTH); + + if (locate_cmos_layout(&rdev) != CB_SUCCESS) { + return CB_CMOS_LAYOUT_NOT_FOUND; + } + ct = rdev_mmap_full(&rdev); + if (!ct) { + printk(BIOS_ERR, "RTC: cmos_layout.bin could not be mapped. " + "Options are disabled\n"); + + return CB_CMOS_LAYOUT_NOT_FOUND; + } + + /* find the requested entry record */ + ce = (struct cmos_entries *)((unsigned char *)ct + ct->header_length); + for (; ce->tag == LB_TAG_OPTION; + ce = (struct cmos_entries *)((unsigned char *)ce + ce->size)) { + if (memcmp(ce->name, name, namelen) == 0) { + found = 1; + break; + } + } + if (!found) { + printk(BIOS_DEBUG, "WARNING: No CMOS option '%s'.\n", name); + rdev_munmap(&rdev, ct); + return CB_CMOS_OPTION_NOT_FOUND; + } + + length = ce->length; + if (ce->config == 's') { + length = MAX(strlen((const char *)value) * 8, ce->length - 8); + /* make sure the string is null terminated */ + if (set_cmos_value(ce->bit + ce->length - 8, 8, &(u8[]){0}) + != CB_SUCCESS) { + rdev_munmap(&rdev, ct); + return CB_CMOS_ACCESS_ERROR; + } + } + + if (set_cmos_value(ce->bit, length, value) != CB_SUCCESS) { + rdev_munmap(&rdev, ct); + return CB_CMOS_ACCESS_ERROR; + } + + rdev_munmap(&rdev, ct); + return CB_SUCCESS; +} |