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-rw-r--r--src/drivers/pc80/rtc/mc146818rtc.c70
-rw-r--r--src/lib/cbfs.c5
-rw-r--r--src/security/vboot/Makefile.inc2
3 files changed, 65 insertions, 12 deletions
diff --git a/src/drivers/pc80/rtc/mc146818rtc.c b/src/drivers/pc80/rtc/mc146818rtc.c
index 928b403239..34db4c3424 100644
--- a/src/drivers/pc80/rtc/mc146818rtc.c
+++ b/src/drivers/pc80/rtc/mc146818rtc.c
@@ -240,9 +240,34 @@ static enum cb_err get_cmos_value(unsigned long bit, unsigned long length,
return CB_SUCCESS;
}
+static enum cb_err locate_cmos_layout(struct region_device *rdev)
+{
+ uint32_t cbfs_type = CBFS_COMPONENT_CMOS_LAYOUT;
+ 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 (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 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;
@@ -255,16 +280,20 @@ enum cb_err get_option(void *dest, const char *name)
/* Figure out how long name is */
namelen = strnlen(name, CMOS_MAX_NAME_LENGTH);
- /* find the requested entry record */
- ct = cbfs_boot_map_with_leak("cmos_layout.bin",
- CBFS_COMPONENT_CMOS_LAYOUT, NULL);
+ if (locate_cmos_layout(&rdev) != CB_SUCCESS) {
+ UNLOCK_NVRAM_CBFS_SPINLOCK();
+ return CB_CMOS_LAYOUT_NOT_FOUND;
+ }
+ ct = rdev_mmap_full(&rdev);
if (!ct) {
- printk(BIOS_ERR, "RTC: cmos_layout.bin could not be found. "
- "Options are disabled\n");
+ printk(BIOS_ERR, "RTC: cmos_layout.bin could not be mapped. "
+ "Options are disabled\n");
UNLOCK_NVRAM_CBFS_SPINLOCK();
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)) {
@@ -275,18 +304,22 @@ enum cb_err get_option(void *dest, const char *name)
}
if (!found) {
printk(BIOS_DEBUG, "WARNING: No CMOS option '%s'.\n", name);
+ rdev_munmap(&rdev, ct);
UNLOCK_NVRAM_CBFS_SPINLOCK();
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);
UNLOCK_NVRAM_CBFS_SPINLOCK();
return CB_CMOS_CHECKSUM_INVALID;
}
if (get_cmos_value(ce->bit, ce->length, dest) != CB_SUCCESS) {
+ rdev_munmap(&rdev, ct);
UNLOCK_NVRAM_CBFS_SPINLOCK();
return CB_CMOS_ACCESS_ERROR;
}
+ rdev_munmap(&rdev, ct);
UNLOCK_NVRAM_CBFS_SPINLOCK();
return CB_SUCCESS;
}
@@ -347,6 +380,7 @@ unsigned int read_option_lowlevel(unsigned int start, unsigned int size,
enum cb_err 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;
@@ -358,14 +392,20 @@ enum cb_err set_option(const char *name, void *value)
/* Figure out how long name is */
namelen = strnlen(name, CMOS_MAX_NAME_LENGTH);
- /* find the requested entry record */
- ct = cbfs_boot_map_with_leak("cmos_layout.bin",
- CBFS_COMPONENT_CMOS_LAYOUT, NULL);
+ if (locate_cmos_layout(&rdev) != CB_SUCCESS) {
+ UNLOCK_NVRAM_CBFS_SPINLOCK();
+ return CB_CMOS_LAYOUT_NOT_FOUND;
+ }
+ ct = rdev_mmap_full(&rdev);
if (!ct) {
- printk(BIOS_ERR, "cmos_layout.bin could not be found. "
- "Options are disabled\n");
+ printk(BIOS_ERR, "RTC: cmos_layout.bin could not be mapped. "
+ "Options are disabled\n");
+
+ UNLOCK_NVRAM_CBFS_SPINLOCK();
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)) {
@@ -376,6 +416,7 @@ enum cb_err set_option(const char *name, void *value)
}
if (!found) {
printk(BIOS_DEBUG, "WARNING: No CMOS option '%s'.\n", name);
+ rdev_munmap(&rdev, ct);
return CB_CMOS_OPTION_NOT_FOUND;
}
@@ -384,13 +425,18 @@ enum cb_err set_option(const char *name, void *value)
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)
+ != CB_SUCCESS) {
+ rdev_munmap(&rdev, ct);
return CB_CMOS_ACCESS_ERROR;
+ }
}
- if (set_cmos_value(ce->bit, length, value) != CB_SUCCESS)
+ 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;
}
diff --git a/src/lib/cbfs.c b/src/lib/cbfs.c
index 9938e6abbe..ca1fc8477e 100644
--- a/src/lib/cbfs.c
+++ b/src/lib/cbfs.c
@@ -321,6 +321,11 @@ extern const struct cbfs_locator vboot_locator;
static const struct cbfs_locator *locators[] = {
#if IS_ENABLED(CONFIG_VBOOT)
+ /*
+ * NOTE: Does not link in SMM, as the vboot_locator isn't compiled.
+ * ATM there's no need for VBOOT functionality in SMM and it's not
+ * a problem.
+ */
&vboot_locator,
#endif
&cbfs_master_header_locator,
diff --git a/src/security/vboot/Makefile.inc b/src/security/vboot/Makefile.inc
index 6f18a35de5..75c2a9e44c 100644
--- a/src/security/vboot/Makefile.inc
+++ b/src/security/vboot/Makefile.inc
@@ -154,6 +154,8 @@ regions-for-file = $(subst $(spc),$(comma),$(sort \
font.bin \
vbgfx.bin \
rmu.bin \
+ cmos_layout.bin \
+ cmos.default \
$(call strip_quotes,$(CONFIG_RO_REGION_ONLY)) \
,$(1)),COREBOOT,COREBOOT FW_MAIN_A FW_MAIN_B)))