From 5b89bf4666424bb9b5c72d8fa2b30a124ac1026d Mon Sep 17 00:00:00 2001 From: Eric Lai Date: Wed, 14 Dec 2022 15:48:35 +0800 Subject: lib: Introduce fw_config_get_field In some cases, fw_config is used for ids like sar_id, sku_id etc. To avoid calling fw_config_probe over and over, hence provide the method to return the value then caller can use the switch case instead of if else statement. TEST=get fw_config field value on nivviks. [INFO ] fw_config get field name=DB_USB, mask=0x3, shift=0, value =0x1 Signed-off-by: Eric Lai Change-Id: Iae89668e8fe7322d5a4dcbf88a97d7ed36619af5 Reviewed-on: https://review.coreboot.org/c/coreboot/+/70745 Tested-by: build bot (Jenkins) Reviewed-by: Julius Werner Reviewed-by: Tim Wawrzynczak --- src/include/fw_config.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'src/include/fw_config.h') diff --git a/src/include/fw_config.h b/src/include/fw_config.h index 7a8ad30482..04fdf98921 100644 --- a/src/include/fw_config.h +++ b/src/include/fw_config.h @@ -24,6 +24,11 @@ struct fw_config { uint64_t value; }; +struct fw_config_field { + const char *field_name; + uint64_t mask; +}; + /* Generate a pointer to a compound literal of the fw_config structure. */ #define FW_CONFIG(__field, __option) (&(const struct fw_config) { \ .field_name = FW_CONFIG_FIELD_##__field##_NAME, \ @@ -32,6 +37,11 @@ struct fw_config { .value = FW_CONFIG_FIELD_##__field##_OPTION_##__option##_VALUE \ }) +#define FW_CONFIG_FIELD(__field) (&(const struct fw_config_field) { \ + .field_name = FW_CONFIG_FIELD_##__field##_NAME, \ + .mask = FW_CONFIG_FIELD_##__field##_MASK, \ +}) + /** * fw_config_get() - Provide firmware configuration value. * @@ -41,6 +51,16 @@ uint64_t fw_config_get(void); #if CONFIG(FW_CONFIG) +/** + * fw_config_get_field() - Provide firmware configuration field value. + * @field: Structure containing field name and mask + * + * Return 64bit firmware configuration value determined for the system. + * Will return UNDEFINED_FW_CONFIG if unprovisioned, caller should treat + * as error value for the case. + */ +uint64_t fw_config_get_field(const struct fw_config_field *field); + /** * fw_config_probe() - Check if field and option matches. * @match: Structure containing field and option to probe. -- cgit v1.2.3