diff options
| -rw-r--r-- | src/vendorcode/google/chromeos/chromeos.h | 12 | ||||
| -rw-r--r-- | src/vendorcode/google/chromeos/tpm_factory_config.c | 26 |
2 files changed, 38 insertions, 0 deletions
diff --git a/src/vendorcode/google/chromeos/chromeos.h b/src/vendorcode/google/chromeos/chromeos.h index c14af319f5a6..0c5e4f7daf89 100644 --- a/src/vendorcode/google/chromeos/chromeos.h +++ b/src/vendorcode/google/chromeos/chromeos.h @@ -32,6 +32,18 @@ void chromeos_set_ramoops(void *ram_oops, size_t size); * Return `-1` in case of error. */ int64_t chromeos_get_factory_config(void); +/* + * Determines whether a ChromeOS device is branded as a Chromebook Plus + * based on specific bit flags: + * + * - Bit 4 (0x10): Indicates whether the device chassis has the + * "chromebook-plus" branding. + * - Bits 3-0 (0x1): Must be 0x1 to signify compliance with Chromebook Plus + * hardware specifications. + * + * To be considered a Chromebook Plus, either of these conditions needs to be met. + */ +bool chromeos_device_branded_plus(void); /* * Declaration for mainboards to use to generate ACPI-specific ChromeOS needs. diff --git a/src/vendorcode/google/chromeos/tpm_factory_config.c b/src/vendorcode/google/chromeos/tpm_factory_config.c index 3b68020bd1b7..4f8801ab0dde 100644 --- a/src/vendorcode/google/chromeos/tpm_factory_config.c +++ b/src/vendorcode/google/chromeos/tpm_factory_config.c @@ -2,8 +2,13 @@ #include <console/console.h> #include <security/tpm/tss.h> +#include <types.h> #include <vendorcode/google/chromeos/chromeos.h> +#define CHROMEBOOK_PLUS_HARD_BRANDED BIT(4) +#define CHROMEBOOK_PLUS_SOFT_BRANDED BIT(0) +#define CHROMEBOOK_PLUS_DEVICE (CHROMEBOOK_PLUS_HARD_BRANDED | CHROMEBOOK_PLUS_SOFT_BRANDED) + int64_t chromeos_get_factory_config(void) { static int64_t factory_config = -1; @@ -29,3 +34,24 @@ int64_t chromeos_get_factory_config(void) return factory_config; } + +/* + * Determines whether a ChromeOS device is branded as a Chromebook Plus + * based on specific bit flags: + * + * - Bit 4 (0x10): Indicates whether the device chassis has the + * "chromebook-plus" branding. + * - Bits 3-0 (0x1): Must be 0x1 to signify compliance with Chromebook Plus + * hardware specifications. + * + * To be considered a Chromebook Plus, either of these conditions needs to be met. + */ +bool chromeos_device_branded_plus(void) +{ + int64_t factory_config = chromeos_get_factory_config(); + + if (factory_config < 0) + return false; + + return factory_config & CHROMEBOOK_PLUS_DEVICE; +} |