diff options
| -rw-r--r-- | src/arch/x86/acpigen.c | 57 | ||||
| -rw-r--r-- | src/arch/x86/include/arch/acpigen.h | 6 |
2 files changed, 63 insertions, 0 deletions
diff --git a/src/arch/x86/acpigen.c b/src/arch/x86/acpigen.c index e283f4da31..74cd25a858 100644 --- a/src/arch/x86/acpigen.c +++ b/src/arch/x86/acpigen.c @@ -514,6 +514,63 @@ void acpigen_write_field(const char *name, struct fieldlist *l, size_t count, acpigen_pop_len(); } +/* + * Generate ACPI AML code for IndexField + * Arg0: region name + * Arg1: Pointer to struct fieldlist. + * Arg2: no. of entries in Arg1 + * Arg3: flags which indicate filed access type, lock rule & update rule. + * Example with fieldlist + * struct fieldlist l[] = { + * FIELDLIST_OFFSET(0x84), + * FIELDLIST_NAMESTR("PMCS", 2), + * }; + * acpigen_write_field("IDX", "DATA" l, ARRAY_SIZE(l), FIELD_ANYACC | + * FIELD_NOLOCK | + * FIELD_PRESERVE); + * Output: + * IndexField (IDX, DATA, AnyAcc, NoLock, Preserve) + * { + * Offset (0x84), + * PMCS, 2 + * } + */ +void acpigen_write_indexfield(const char *idx, const char *data, + struct fieldlist *l, size_t count, uint8_t flags) +{ + uint16_t i; + uint32_t current_bit_pos = 0; + + /* FieldOp */ + acpigen_emit_ext_op(INDEX_FIELD_OP); + /* Package Length */ + acpigen_write_len_f(); + /* NameString 4 chars only */ + acpigen_emit_simple_namestring(idx); + /* NameString 4 chars only */ + acpigen_emit_simple_namestring(data); + /* Field Flag */ + acpigen_emit_byte(flags); + + for (i = 0; i < count; i++) { + switch (l[i].type) { + case NAME_STRING: + acpigen_write_field_name(l[i].name, l[i].bits); + current_bit_pos += l[i].bits; + break; + case OFFSET: + acpigen_write_field_offset(l[i].bits, current_bit_pos); + current_bit_pos = l[i].bits; + break; + default: + printk(BIOS_ERR, "%s: Invalid field type 0x%X\n" + , __func__, l[i].type); + break; + } + } + acpigen_pop_len(); +} + void acpigen_write_empty_PCT(void) { /* diff --git a/src/arch/x86/include/arch/acpigen.h b/src/arch/x86/include/arch/acpigen.h index 6114667c6c..db003fe113 100644 --- a/src/arch/x86/include/arch/acpigen.h +++ b/src/arch/x86/include/arch/acpigen.h @@ -420,6 +420,12 @@ void acpigen_write_opregion(struct opregion *opreg); */ void acpigen_write_field(const char *name, struct fieldlist *l, size_t count, uint8_t flags); +/* + * Generate ACPI AML code for IndexField + * This function takes input index name, data name, fieldlist, count & flags. + */ +void acpigen_write_indexfield(const char *idx, const char *data, + struct fieldlist *l, size_t count, uint8_t flags); int get_cst_entries(acpi_cstate_t **); |