arch/x86/acpigen: Add helpers for Store() and If (Lequal (...))

This change adds the following acpigen helpers:
a. acpigen_write_store_op_to_namestr: This generates ACPI code for
storing an ACPI OP to name string

b. acpigen_write_if_lequal_namestr_int: This generates ACPI code for
checking if operand1 and operand2 are equal where operand1 is
namestring and operand2 is an integer.

Change-Id: I84c158361c0725c2927f06be35391e61f627a453
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40783
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 24 insertions, 0 deletions

diff --git a/src/arch/x86/acpigen.c b/src/arch/x86/acpigen.c
index 715c38b598..82654e18dd 100644
--- a/src/arch/x86/acpigen.c
+++ b/src/arch/x86/acpigen.c
@@ -1186,6 +1186,14 @@ void acpigen_write_store_ops(uint8_t src, uint8_t dst)
 	acpigen_emit_byte(dst);
 }
 
+/* Store (src, "namestr") */
+void acpigen_write_store_op_to_namestr(uint8_t src, const char *dst)
+{
+	acpigen_write_store();
+	acpigen_emit_byte(src);
+	acpigen_emit_namestring(dst);
+}
+
 /* Or (arg1, arg2, res) */
 void acpigen_write_or(uint8_t arg1, uint8_t arg2, uint8_t res)
 {
@@ -1274,6 +1282,20 @@ void acpigen_write_if_lequal_op_int(uint8_t op, uint64_t val)
 	acpigen_write_integer(val);
 }
 
+/*
+ * Generates ACPI code for checking if operand1 and operand2 are equal, where,
+ * operand1 is namestring and operand2 is an integer.
+ *
+ * If (Lequal ("namestr", val))
+ */
+void acpigen_write_if_lequal_namestr_int(const char *namestr, uint64_t val)
+{
+	acpigen_write_if();
+	acpigen_emit_byte(LEQUAL_OP);
+	acpigen_emit_namestring(namestr);
+	acpigen_write_integer(val);
+}
+
 void acpigen_write_else(void)
 {
 	acpigen_emit_byte(ELSE_OP);
diff --git a/src/arch/x86/include/arch/acpigen.h b/src/arch/x86/include/arch/acpigen.h
index 0eee7ffea7..3a74db11e9 100644
--- a/src/arch/x86/include/arch/acpigen.h
+++ b/src/arch/x86/include/arch/acpigen.h
@@ -351,6 +351,7 @@ void acpigen_write_power_res(const char *name, uint8_t level, uint16_t order,
 void acpigen_write_sleep(uint64_t sleep_ms);
 void acpigen_write_store(void);
 void acpigen_write_store_ops(uint8_t src, uint8_t dst);
+void acpigen_write_store_op_to_namestr(uint8_t src, const char *dst);
 void acpigen_write_or(uint8_t arg1, uint8_t arg2, uint8_t res);
 void acpigen_write_xor(uint8_t arg1, uint8_t arg2, uint8_t res);
 void acpigen_write_and(uint8_t arg1, uint8_t arg2, uint8_t res);
@@ -361,6 +362,7 @@ void acpigen_write_debug_op(uint8_t op);
 void acpigen_write_if(void);
 void acpigen_write_if_and(uint8_t arg1, uint8_t arg2);
 void acpigen_write_if_lequal_op_int(uint8_t op, uint64_t val);
+void acpigen_write_if_lequal_namestr_int(const char *namestr, uint64_t val);
 void acpigen_write_else(void);
 void acpigen_write_to_buffer(uint8_t src, uint8_t dst);
 void acpigen_write_to_integer(uint8_t src, uint8_t dst);