acpigen: Add printf-like function for debug string

Generate formatted string and ACPI code to print debug string.

For example (with pcie_rp = 1):

    acpigen_write_debug_sprintf("calling _ON for RP: %u", pcie_rp);

generates the following ACPI code:

    Debug = "calling _ON for RP: 1"

With this new function, the following functions are not needed anymore
and therefore are removed by this patch.

- acpigen_concatenate_string_string()
- acpigen_concatenate_string_int()
- acpigen_write_debug_concatenate_string_string()
- acpigen_write_debug_concatenate_string_int()

BRANCH=firmware-brya-14505.B
TEST=Add above functions in the acpigen code and check the generated
     SSDT table after OS boot. Check the debug messages is in the
     kernel log when /sys/modules/acpi/parameters/aml_debug_output is
     set to '1'.

Change-Id: Id4a42e5854516a22b7bc4559c2ed08680722c5ba
Signed-off-by: Cliff Huang <cliff.huang@intel.com>
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73113
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Bora Guvendik <bora.guvendik@intel.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Zhixing Ma <zhixing.ma@intel.com>
Reviewed-by: Musse Abdullahi <musse.abdullahi@intel.corp-partner.google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>

1 files changed, 18 insertions, 33 deletions

diff --git a/src/acpi/acpigen.c b/src/acpi/acpigen.c
index b85acbc9b4..fdf98cdda2 100644
--- a/src/acpi/acpigen.c
+++ b/src/acpi/acpigen.c
@@ -1448,24 +1448,6 @@ void acpigen_write_not(uint8_t arg, uint8_t res)
 	acpigen_emit_byte(res);
 }
 
-/* Concatenate (str1, str2, res) */
-void acpigen_concatenate_string_string(const char *str1, const char *str2, uint8_t res)
-{
-	acpigen_emit_byte(CONCATENATE_OP);
-	acpigen_write_string(str1);
-	acpigen_write_string(str2);
-	acpigen_emit_byte(res);
-}
-
-/* Concatenate (str, val, tmp_res) */
-void acpigen_concatenate_string_int(const char *str, uint64_t val, uint8_t res)
-{
-	acpigen_emit_byte(CONCATENATE_OP);
-	acpigen_write_string(str);
-	acpigen_write_integer(val);
-	acpigen_emit_byte(res);
-}
-
 /* Concatenate (str, src_res, dest_res) */
 void acpigen_concatenate_string_op(const char *str, uint8_t src_res, uint8_t dest_res)
 {
@@ -1507,31 +1489,34 @@ void acpigen_write_debug_namestr(const char *str)
 	acpigen_emit_ext_op(DEBUG_OP);
 }
 
-/* Concatenate (str1, str2, tmp_res)
+/* Concatenate (str1, res, tmp_res)
    Store(tmp_res, DEBUG) */
-void acpigen_write_debug_concatenate_string_string(const char *str1, const char *str2,
+void acpigen_write_debug_concatenate_string_op(const char *str, uint8_t res,
 	uint8_t tmp_res)
 {
-	acpigen_concatenate_string_string(str1, str2, tmp_res);
+	acpigen_concatenate_string_op(str, res, tmp_res);
 	acpigen_write_debug_op(tmp_res);
 }
 
-/* Concatenate (str1, val, tmp_res)
-   Store(tmp_res, DEBUG) */
-void acpigen_write_debug_concatenate_string_int(const char *str, uint64_t val,
-	uint8_t tmp_res)
+static void acpigen_tx_byte(unsigned char byte, void *data)
 {
-	acpigen_concatenate_string_int(str, val, tmp_res);
-	acpigen_write_debug_op(tmp_res);
+	acpigen_emit_byte(byte);
 }
 
-/* Concatenate (str1, res, tmp_res)
-   Store(tmp_res, DEBUG) */
-void acpigen_write_debug_concatenate_string_op(const char *str, uint8_t res,
-	uint8_t tmp_res)
+/* Store("formatted string", DEBUG) */
+void acpigen_write_debug_sprintf(const char *fmt, ...)
 {
-	acpigen_concatenate_string_op(str, res, tmp_res);
-	acpigen_write_debug_op(tmp_res);
+	va_list args;
+
+	acpigen_write_store();
+
+	acpigen_emit_byte(STRING_PREFIX);
+	va_start(args, fmt);
+	vtxprintf(acpigen_tx_byte, fmt, args, NULL);
+	va_end(args);
+	acpigen_emit_byte('\0');
+
+	acpigen_emit_ext_op(DEBUG_OP);
 }
 
 void acpigen_write_if(void)