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| author | Tim Wawrzynczak <twawrzynczak@chromium.org> | 2020-11-24 10:33:00 -0700 |
|---|---|---|
| committer | Tim Wawrzynczak <twawrzynczak@chromium.org> | 2020-12-11 16:59:35 +0000 |
| commit | 473bc8c892c3acf6b1a222a09a53d5a190611bba (patch) | |
| tree | 581540c8b2feabed18b775337b585c5ac78ddccb /src | |
| parent | 5258f4f93e2d23e839765349a844d798f054da6a (diff) | |
| download | coreboot-473bc8c892c3acf6b1a222a09a53d5a190611bba.tar.gz coreboot-473bc8c892c3acf6b1a222a09a53d5a190611bba.tar.bz2 coreboot-473bc8c892c3acf6b1a222a09a53d5a190611bba.zip | |
fw_config: Use UNDEFINED_FW_CONFIG to mean unprovisioned
A mainboard might want to configure some things differently when a
device is in an unprovisioned state. In the case when fw_config comes
from the Chromium EC, an unprovisioned device will not have a FW_CONFIG
tag in its CBI. This patch will set the fw_config value to
UNDEFINED_FW_CONFIG in the case of an error retrieving the value, as
well as adding a function, `fw_config_is_provisioned()` to indicate the
provisioning status.
BUG=none
TEST=remove fw_config from chromium EC CBI, add code to mainboard to
print return value of fw_config_is_provisioned() (`0`), add
fw_config back to CBI, run same test and see `1`.
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: Ib3046233667e97a5f78961fabacbeb3099b3d442
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47956
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/fw_config.h | 6 | ||||
| -rw-r--r-- | src/lib/fw_config.c | 11 |
2 files changed, 15 insertions, 2 deletions
diff --git a/src/include/fw_config.h b/src/include/fw_config.h index 3c8772598e4f..b7028713587d 100644 --- a/src/include/fw_config.h +++ b/src/include/fw_config.h @@ -57,6 +57,12 @@ bool fw_config_probe(const struct fw_config *match); void fw_config_for_each_found(void (*cb)(const struct fw_config *config, void *arg), void *arg); /** + * fw_config_is_provisioned() - Determine if FW_CONFIG has been provisioned. + * Return %true if FW_CONFIG has been provisioned, %false otherwise. + */ +bool fw_config_is_provisioned(void); + +/** * fw_config_get_found() - Return a pointer to the fw_config struct for a given field. * @field_mask: A field mask from static.h, e.g., FW_CONFIG_FIELD_FEATURE_MASK * diff --git a/src/lib/fw_config.c b/src/lib/fw_config.c index 2f7186cc86f9..2c4c6b290c3b 100644 --- a/src/lib/fw_config.c +++ b/src/lib/fw_config.c @@ -28,7 +28,7 @@ uint64_t fw_config_get(void) sizeof(fw_config_value)) != sizeof(fw_config_value)) { printk(BIOS_WARNING, "%s: Could not get fw_config from CBFS\n", __func__); - fw_config_value = 0; + fw_config_value = UNDEFINED_FW_CONFIG; } else { printk(BIOS_INFO, "FW_CONFIG value from CBFS is 0x%" PRIx64 "\n", fw_config_value); @@ -38,8 +38,10 @@ uint64_t fw_config_get(void) /* Read the value from EC CBI. */ if (CONFIG(FW_CONFIG_SOURCE_CHROMEEC_CBI)) { - if (google_chromeec_cbi_get_fw_config(&fw_config_value)) + if (google_chromeec_cbi_get_fw_config(&fw_config_value)) { printk(BIOS_WARNING, "%s: Could not get fw_config from EC\n", __func__); + fw_config_value = UNDEFINED_FW_CONFIG; + } } printk(BIOS_INFO, "FW_CONFIG value is 0x%" PRIx64 "\n", fw_config_value); @@ -63,6 +65,11 @@ bool fw_config_probe(const struct fw_config *match) return false; } +bool fw_config_is_provisioned(void) +{ + return fw_config_get() != UNDEFINED_FW_CONFIG; +} + #if ENV_RAMSTAGE /* |