acpigen: Add support for IndexField
Add support for generating IndexField, which is similar to Field.
Change-Id: If66a627e64953696b0b68488256bd5c141e4c205
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33032
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/arch/x86/acpigen.c b/src/arch/x86/acpigen.c
index e283f4d..74cd25a 100644
--- a/src/arch/x86/acpigen.c
+++ b/src/arch/x86/acpigen.c
@@ -514,6 +514,63 @@
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)
{
/*