ACPI supports storing a simple nul-terminated string. Add support for this.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v1: None
include/acpi/acpigen.h | 10 ++++++++++ lib/acpi/acpigen.c | 6 ++++++ test/dm/acpigen.c | 32 ++++++++++++++++++++++++++++++-- 3 files changed, 46 insertions(+), 2 deletions(-)
diff --git a/include/acpi/acpigen.h b/include/acpi/acpigen.h index a4edcb097b..f65de53a76 100644 --- a/include/acpi/acpigen.h +++ b/include/acpi/acpigen.h @@ -21,6 +21,7 @@ enum { BYTE_PREFIX = 0x0a, WORD_PREFIX = 0x0b, DWORD_PREFIX = 0x0c, + STRING_PREFIX = 0x0d, QWORD_PREFIX = 0x0e, PACKAGE_OP = 0x12, }; @@ -147,4 +148,13 @@ char *acpigen_write_package(struct acpi_ctx *ctx, int nr_el); */ void acpigen_write_integer(struct acpi_ctx *ctx, u64 data);
+/** + * acpigen_write_string() - Write a string + * + * This writes a STRING_PREFIX followed by a nul-terminated string + * + * @ctx: ACPI context pointer + * @str: String to write + */ +void acpigen_write_string(struct acpi_ctx *ctx, const char *str); #endif diff --git a/lib/acpi/acpigen.c b/lib/acpi/acpigen.c index 01222533f2..275293d22c 100644 --- a/lib/acpi/acpigen.c +++ b/lib/acpi/acpigen.c @@ -145,3 +145,9 @@ void acpigen_emit_string(struct acpi_ctx *ctx, const char *str) acpigen_emit_stream(ctx, str, str ? strlen(str) : 0); acpigen_emit_byte(ctx, '\0'); /* NUL */ } + +void acpigen_write_string(struct acpi_ctx *ctx, const char *str) +{ + acpigen_emit_byte(ctx, STRING_PREFIX); + acpigen_emit_string(ctx, str); +} diff --git a/test/dm/acpigen.c b/test/dm/acpigen.c index 9350943a12..dc6993b7a7 100644 --- a/test/dm/acpigen.c +++ b/test/dm/acpigen.c @@ -20,6 +20,7 @@ #include <test/ut.h>
#define TEST_STRING "frogmore" +#define TEST_STRING2 "ranch" #define TEST_STREAM2 "\xfa\xde"
#define TEST_INT8 0x7d @@ -400,7 +401,7 @@ static int dm_test_acpi_len(struct unit_test_state *uts) } DM_TEST(dm_test_acpi_len, 0);
-/* Test emitting a package */ +/* Test writing a package */ static int dm_test_acpi_package(struct unit_test_state *uts) { struct acpi_ctx *ctx; @@ -427,7 +428,7 @@ static int dm_test_acpi_package(struct unit_test_state *uts) } DM_TEST(dm_test_acpi_package, 0);
-/* Test emitting an integer */ +/* Test writing an integer */ static int dm_test_acpi_integer(struct unit_test_state *uts) { struct acpi_ctx *ctx; @@ -467,3 +468,30 @@ static int dm_test_acpi_integer(struct unit_test_state *uts) return 0; } DM_TEST(dm_test_acpi_integer, 0); + +/* Test writing a string */ +static int dm_test_acpi_string(struct unit_test_state *uts) +{ + struct acpi_ctx *ctx; + u8 *ptr; + + ut_assertok(alloc_context(&ctx)); + + ptr = acpigen_get_current(ctx); + + acpigen_write_string(ctx, TEST_STRING); + acpigen_write_string(ctx, TEST_STRING2); + + ut_asserteq(2 + sizeof(TEST_STRING) + sizeof(TEST_STRING2), + acpigen_get_current(ctx) - ptr); + ut_asserteq(STRING_PREFIX, ptr[0]); + ut_asserteq_str(TEST_STRING, (char *)ptr + 1); + ptr += 1 + sizeof(TEST_STRING); + ut_asserteq(STRING_PREFIX, ptr[0]); + ut_asserteq_str(TEST_STRING2, (char *)ptr + 1); + + free_context(&ctx); + + return 0; +} +DM_TEST(dm_test_acpi_string, 0);