src/acpi: add function gen: if_lgreater_ and namestr assignment

1. add functions to generate if greater than conditions:
acpigen_write_if_lgreater_op_op:
   if (op1 > op2)
acpigen_write_if_lgreater_op_int:
   if (op > val)
acpigen_write_if_lgreater_namestr_int:
   if (namestr > val)
2. add function to assignal value to a namestr
 acpigen_write_store_namestr_to_op:
   namestr = val

TEST=Use above functions and check the generated SSDT table after OS
boot.

Signed-off-by: Cliff Huang <cliff.huang@intel.com>
Change-Id: Iffe1b23362a7ab58bdc2aa8daf45cd6f086ee818
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72825
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com>
Reviewed-by: Anil Kumar K <anil.kumar.k@intel.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/acpi/acpigen.c

@@ -1369,6 +1369,14 @@ void acpigen_write_store_int_to_namestr(uint64_t src, const char *dst)
 	acpigen_emit_namestring(dst);
 }
 
+/* Store ("namestr", dst) */
+void acpigen_write_store_namestr_to_op(const char *src, uint8_t dst)
+{
+	acpigen_write_store();
+	acpigen_emit_namestring(src);
+	acpigen_emit_byte(dst);
+}
+
 /* Store (src, dst) */
 void acpigen_write_store_int_to_op(uint64_t src, uint8_t dst)
 {
@@ -1527,6 +1535,20 @@ void acpigen_write_if_lequal_op_op(uint8_t op1, uint8_t op2)
 	acpigen_emit_byte(op2);
 }
 
+/*
+ * Generates ACPI code for checking if operand1 is greater than operand2.
+ * Both operand1 and operand2 are ACPI ops.
+ *
+ * If (Lgreater (op1 op2))
+ */
+void acpigen_write_if_lgreater_op_op(uint8_t op1, uint8_t op2)
+{
+	acpigen_write_if();
+	acpigen_emit_byte(LGREATER_OP);
+	acpigen_emit_byte(op1);
+	acpigen_emit_byte(op2);
+}
+
 /*
  * Generates ACPI code for checking if operand1 and operand2 are equal, where,
  * operand1 is ACPI op and operand2 is an integer.
@@ -1541,6 +1563,20 @@ void acpigen_write_if_lequal_op_int(uint8_t op, uint64_t val)
 	acpigen_write_integer(val);
 }
 
+/*
+ * Generates ACPI code for checking if operand is greater than the value, where,
+ * operand is ACPI op and val is an integer.
+ *
+ * If (Lgreater (op, val))
+ */
+void acpigen_write_if_lgreater_op_int(uint8_t op, uint64_t val)
+{
+	acpigen_write_if();
+	acpigen_emit_byte(LGREATER_OP);
+	acpigen_emit_byte(op);
+	acpigen_write_integer(val);
+}
+
 /*
  * Generates ACPI code for checking if operand1 and operand2 are equal, where,
  * operand1 is namestring and operand2 is an integer.
@@ -1555,6 +1591,20 @@ void acpigen_write_if_lequal_namestr_int(const char *namestr, 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 (Lgreater ("namestr", val))
+ */
+void acpigen_write_if_lgreater_namestr_int(const char *namestr, uint64_t val)
+{
+	acpigen_write_if();
+	acpigen_emit_byte(LGREATER_OP);
+	acpigen_emit_namestring(namestr);
+	acpigen_write_integer(val);
+}
+
 /*
  * Generates ACPI code to check at runtime if an object named `namestring`
  * exists, and leaves the If scope open to continue execute code when this

src/include/acpi/acpigen.h

@@ -487,6 +487,7 @@ void acpigen_write_store_int_to_namestr(uint64_t src, const char *dst);
 void acpigen_write_store_int_to_op(uint64_t src, uint8_t dst);
 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_store_namestr_to_op(const char *src, uint8_t 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);
@@ -506,8 +507,11 @@ void acpigen_write_debug_concatenate_string_op(const char *str1, uint8_t res, ui
 void acpigen_write_if(void);
 void acpigen_write_if_and(uint8_t arg1, uint8_t arg2);
 void acpigen_write_if_lequal_op_op(uint8_t op, uint8_t val);
+void acpigen_write_if_lgreater_op_op(uint8_t op1, uint8_t op2);
 void acpigen_write_if_lequal_op_int(uint8_t op, uint64_t val);
+void acpigen_write_if_lgreater_op_int(uint8_t op, uint64_t val);
 void acpigen_write_if_lequal_namestr_int(const char *namestr, uint64_t val);
+void acpigen_write_if_lgreater_namestr_int(const char *namestr, uint64_t val);
 __always_inline void acpigen_write_if_end(void)
 {
 	acpigen_pop_len();