diff options
Diffstat (limited to 'src/arch/x86/acpigen.c')
| -rw-r--r-- | src/arch/x86/acpigen.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/arch/x86/acpigen.c b/src/arch/x86/acpigen.c index a614efb002..f73ace298e 100644 --- a/src/arch/x86/acpigen.c +++ b/src/arch/x86/acpigen.c @@ -1339,6 +1339,55 @@ void acpigen_write_dsm_uuid_arr(struct dsm_uuid *ids, size_t count) acpigen_pop_len(); /* Method _DSM */ } +#define CPPC_PACKAGE_NAME "\\GCPC" + +void acpigen_write_CPPC_package(const struct cppc_config *config) +{ + u32 i; + u32 max; + switch (config->version) { + case 1: + max = CPPC_MAX_FIELDS_VER_1; + break; + case 2: + max = CPPC_MAX_FIELDS_VER_2; + break; + case 3: + max = CPPC_MAX_FIELDS_VER_3; + break; + default: + printk(BIOS_ERR, "ERROR: CPPC version %u is not implemented\n", + config->version); + return; + } + acpigen_write_name(CPPC_PACKAGE_NAME); + + /* Adding 2 to account for length and version fields */ + acpigen_write_package(max + 2); + acpigen_write_dword(max + 2); + + acpigen_write_byte(config->version); + + for (i = 0; i < max; ++i) { + const acpi_addr_t *reg = &(config->regs[i]); + if (reg->space_id == ACPI_ADDRESS_SPACE_MEMORY && + reg->bit_width == 32 && reg->access_size == 0) { + acpigen_write_dword(reg->addrl); + } else { + acpigen_write_register_resource(reg); + } + } + acpigen_pop_len(); +} + +void acpigen_write_CPPC_method(void) +{ + acpigen_write_method("_CPC", 0); + acpigen_emit_byte(RETURN_OP); + acpigen_emit_namestring(CPPC_PACKAGE_NAME); + acpigen_pop_len(); +} + /* * Generate ACPI AML code for _ROM method. * This function takes as input ROM data and ROM length. |