[PATCH v2 22/35] acpi: Add support for various misc ACPI opcodes
Wolfgang Wallner
wolfgang.wallner at br-automation.com
Wed Jun 3 15:04:02 CEST 2020
Hi Simon,
-----"Simon Glass" <sjg at chromium.org> schrieb: -----
> Betreff: [PATCH v2 22/35] acpi: Add support for various misc ACPI opcodes
>
> Add more functions to handle some miscellaneous ACPI opcodes.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
>
> Changes in v2: None
> Changes in v1: None
>
> include/acpi/acpigen.h | 114 +++++++++++++++++++++++++++++++++++++++++
> lib/acpi/acpigen.c | 83 ++++++++++++++++++++++++++++++
> test/dm/acpigen.c | 75 +++++++++++++++++++++++++++
> 3 files changed, 272 insertions(+)
>
> diff --git a/include/acpi/acpigen.h b/include/acpi/acpigen.h
> index 16b33ebe66..c595bb9efa 100644
> --- a/include/acpi/acpigen.h
> +++ b/include/acpi/acpigen.h
> @@ -26,9 +26,26 @@ enum {
> QWORD_PREFIX = 0x0e,
> BUFFER_OP = 0x11,
> PACKAGE_OP = 0x12,
> + METHOD_OP = 0x14,
> + SLEEP_OP = 0x22,
> DUAL_NAME_PREFIX = 0x2e,
> MULTI_NAME_PREFIX = 0x2f,
> + DEBUG_OP = 0x31,
> + EXT_OP_PREFIX = 0x5b,
> ROOT_PREFIX = 0x5c,
> + LOCAL0_OP = 0x60,
> + LOCAL1_OP = 0x61,
> + LOCAL2_OP = 0x62,
> + LOCAL3_OP = 0x63,
> + LOCAL4_OP = 0x64,
> + LOCAL5_OP = 0x65,
> + LOCAL6_OP = 0x66,
> + LOCAL7_OP = 0x67,
> + STORE_OP = 0x70,
> + AND_OP = 0x7b,
> + OR_OP = 0x7d,
> + NOT_OP = 0x80,
> + RETURN_OP = 0xa4,
> };
>
> /**
> @@ -196,4 +213,101 @@ void acpigen_write_name(struct acpi_ctx *ctx, const char *namepath);
> */
> int acpigen_write_uuid(struct acpi_ctx *ctx, const char *uuid);
>
> +/**
> + * acpigen_emit_ext_op() - Emit an extended op with the EXT_OP_PREFIX prefix
> + *
> + * @ctx: ACPI context pointer
> + * @op: Operation code (e.g. SLEEP_OP)
> + */
> +void acpigen_emit_ext_op(struct acpi_ctx *ctx, uint op);
> +
> +/**
> + * acpigen_write_method() - Write a method header
> + *
> + * @ctx: ACPI context pointer
> + * @name: Method name (4 characters)
> + * @nargs: Number of method arguments (0 if none)
> + */
> +void acpigen_write_method(struct acpi_ctx *ctx, const char *name, int nargs);
> +
> +/**
> + * acpigen_write_method_serialized() - Write a method header
> + *
> + * This sets the 'serialized' flag so that the method is thread-safe
> + *
> + * @ctx: ACPI context pointer
> + * @name: Method name (4 characters)
> + * @nargs: Number of method arguments (0 if none)
> + */
> +void acpigen_write_method_serialized(struct acpi_ctx *ctx, const char *name,
> + int nargs);
> +
> +/**
> + * acpigen_write_sta() - Write a _STA method
> + *
> + * @ctx: ACPI context pointer
> + * @status: Status value to return
> + */
> +void acpigen_write_sta(struct acpi_ctx *ctx, uint status);
> +
> +/**
> + * acpigen_write_sleep() - Write a sleep operation
> + *
> + * @ctx: ACPI context pointer
> + * @sleep_ms: Number of milliseconds to sleep for
> + */
> +void acpigen_write_sleep(struct acpi_ctx *ctx, u64 sleep_ms);
> +
> +/**
> + * acpigen_write_store() - Write a store operation
> + *
> + * @ctx: ACPI context pointer
> + */
> +void acpigen_write_store(struct acpi_ctx *ctx);
> +
> +/**
> + * acpigen_write_debug_string() - Write a debug string
> + *
> + * This writes a debug operation with an associated string
> + *
> + * @ctx: ACPI context pointer
> + * @str: String to write
> + */
> +void acpigen_write_debug_string(struct acpi_ctx *ctx, const char *str);
> +
> +/**
> + * acpigen_write_or() - Write a bitwise OR operation
> + *
> + * res = arg1 | arg2
> + *
> + * @ctx: ACPI context pointer
> + * @arg1: ACPI opcode for operand 1 (e.g. LOCAL0_OP)
> + * @arg2: ACPI opcode for operand 2 (e.g. LOCAL1_OP)
> + * @res: ACPI opcode for result (e.g. LOCAL2_OP)
> + */
> +void acpigen_write_or(struct acpi_ctx *ctx, u8 arg1, u8 arg2, u8 res);
> +
> +/**
> + * acpigen_write_and() - Write a bitwise AND operation
> + *
> + * res = arg1 & arg2
> + *
> + * @ctx: ACPI context pointer
> + * @arg1: ACPI opcode for operand 1 (e.g. LOCAL0_OP)
> + * @arg2: ACPI opcode for operand 2 (e.g. LOCAL1_OP)
> + * @res: ACPI opcode for result (e.g. LOCAL2_OP)
> + */
> +void acpigen_write_and(struct acpi_ctx *ctx, u8 arg1, u8 arg2, u8 res);
> +
> +/**
> + * acpigen_write_or() - Write a bitwise NOT operation
Typo: this should be acpigen_write_not()
> + *
> + * res = ~arg1
> + *
> + * @ctx: ACPI context pointer
> + * @arg: ACPI opcode for operand (e.g. LOCAL0_OP)
> + * @res: ACPI opcode for result (e.g. LOCAL2_OP)
> + */
> +void acpigen_write_not(struct acpi_ctx *ctx, u8 arg, u8 res);
> +
> #endif
> diff --git a/lib/acpi/acpigen.c b/lib/acpi/acpigen.c
> index 7321a98c0f..57b295aa4e 100644
> --- a/lib/acpi/acpigen.c
> +++ b/lib/acpi/acpigen.c
> @@ -74,6 +74,12 @@ void acpigen_pop_len(struct acpi_ctx *ctx)
> p[2] = (len >> 12 & 0xff);
> }
>
> +void acpigen_emit_ext_op(struct acpi_ctx *ctx, uint op)
> +{
> + acpigen_emit_byte(ctx, EXT_OP_PREFIX);
> + acpigen_emit_byte(ctx, op);
> +}
> +
> char *acpigen_write_package(struct acpi_ctx *ctx, int nr_el)
> {
> char *p;
> @@ -253,6 +259,37 @@ void acpigen_write_name(struct acpi_ctx *ctx, const char *namepath)
> acpigen_emit_namestring(ctx, namepath);
> }
>
> +static void acpigen_write_method_(struct acpi_ctx *ctx, const char *name,
> + uint flags)
> +{
> + acpigen_emit_byte(ctx, METHOD_OP);
> + acpigen_write_len_f(ctx);
> + acpigen_emit_namestring(ctx, name);
> + acpigen_emit_byte(ctx, flags);
> +}
> +
> +/* Method (name, nargs, NotSerialized) */
> +void acpigen_write_method(struct acpi_ctx *ctx, const char *name, int nargs)
> +{
> + acpigen_write_method_(ctx, name, nargs & 7);
> +}
> +
> +/* Method (name, nargs, Serialized) */
> +void acpigen_write_method_serialized(struct acpi_ctx *ctx, const char *name,
> + int nargs)
> +{
> + acpigen_write_method_(ctx, name, (nargs & 7) | (1 << 3));
Nit: Defines for the mask and the flag would make this and the above function
more readable.
> +}
> +
> +void acpigen_write_sta(struct acpi_ctx *ctx, uint status)
> +{
> + /* Method (_STA, 0, NotSerialized) { Return (status) } */
> + acpigen_write_method(ctx, "_STA", 0);
> + acpigen_emit_byte(ctx, RETURN_OP);
> + acpigen_write_byte(ctx, status);
> + acpigen_pop_len(ctx);
> +}
> +
> /*
> * ToUUID(uuid)
> *
> @@ -290,3 +327,49 @@ int acpigen_write_uuid(struct acpi_ctx *ctx, const char *uuid)
>
> return 0;
> }
> +
> +/* Sleep (ms) */
> +void acpigen_write_sleep(struct acpi_ctx *ctx, u64 sleep_ms)
> +{
> + acpigen_emit_ext_op(ctx, SLEEP_OP);
> + acpigen_write_integer(ctx, sleep_ms);
> +}
> +
> +void acpigen_write_store(struct acpi_ctx *ctx)
> +{
> + acpigen_emit_byte(ctx, STORE_OP);
> +}
> +
> +/* Or (arg1, arg2, res) */
> +void acpigen_write_or(struct acpi_ctx *ctx, u8 arg1, u8 arg2, u8 res)
> +{
> + acpigen_emit_byte(ctx, OR_OP);
> + acpigen_emit_byte(ctx, arg1);
> + acpigen_emit_byte(ctx, arg2);
> + acpigen_emit_byte(ctx, res);
> +}
> +
> +/* And (arg1, arg2, res) */
> +void acpigen_write_and(struct acpi_ctx *ctx, u8 arg1, u8 arg2, u8 res)
> +{
> + acpigen_emit_byte(ctx, AND_OP);
> + acpigen_emit_byte(ctx, arg1);
> + acpigen_emit_byte(ctx, arg2);
> + acpigen_emit_byte(ctx, res);
> +}
> +
> +/* Not (arg, res) */
> +void acpigen_write_not(struct acpi_ctx *ctx, u8 arg, u8 res)
> +{
> + acpigen_emit_byte(ctx, NOT_OP);
> + acpigen_emit_byte(ctx, arg);
> + acpigen_emit_byte(ctx, res);
> +}
> +
> +/* Store (str, DEBUG) */
> +void acpigen_write_debug_string(struct acpi_ctx *ctx, const char *str)
> +{
> + acpigen_write_store(ctx);
> + acpigen_write_string(ctx, str);
> + acpigen_emit_ext_op(ctx, DEBUG_OP);
> +}
> diff --git a/test/dm/acpigen.c b/test/dm/acpigen.c
> index db8cad47d8..e059d6f80d 100644
> --- a/test/dm/acpigen.c
> +++ b/test/dm/acpigen.c
> @@ -621,3 +621,78 @@ static int dm_test_acpi_uuid(struct unit_test_state *uts)
> return 0;
> }
> DM_TEST(dm_test_acpi_uuid, 0);
> +
> +/* Test writing misc ACPI codes */
> +static int dm_test_acpi_misc(struct unit_test_state *uts)
> +{
> + struct acpi_ctx *ctx;
> + const int flags = 3;
> + const int nargs = 4;
> + u8 *ptr;
> +
> + ut_assertok(alloc_context(&ctx));
> +
> + ptr = acpigen_get_current(ctx);
> + acpigen_write_sleep(ctx, TEST_INT64);
> + ut_asserteq_64(TEST_INT64, get_unaligned((u64 *)(ptr + 3)));
> + ptr += 11;
> +
> + acpigen_write_store(ctx);
> + ut_asserteq(STORE_OP, *ptr);
> + ptr++;
> +
> + acpigen_write_debug_string(ctx, TEST_STRING);
> + ut_asserteq_str(TEST_STRING, (char *)ptr + 2);
> + ptr += 2 + sizeof(TEST_STRING);
> + ut_asserteq(EXT_OP_PREFIX, ptr[0]);
> + ut_asserteq(DEBUG_OP, ptr[1]);
> + ptr += 2;
> +
> + acpigen_write_sta(ctx, flags);
> + ut_asserteq(METHOD_OP, ptr[0]);
> + ut_asserteq(11, get_length(ptr + 1));
> + ut_asserteq_strn("_STA", (char *)ptr + 4);
> + ut_asserteq(0, ptr[8]);
> + ut_asserteq(RETURN_OP, ptr[9]);
> + ut_asserteq(BYTE_PREFIX, ptr[10]);
> + ut_asserteq(flags, ptr[11]);
> + ptr += 12;
> +
> + acpigen_write_sleep(ctx, TEST_INT16);
> + ut_asserteq(SLEEP_OP, ptr[1]);
> + ut_asserteq(TEST_INT16, get_unaligned((u16 *)(ptr + 3)));
> + ptr += 5;
> +
> + acpigen_write_method_serialized(ctx, "FRED", nargs);
> + ut_asserteq(METHOD_OP, ptr[0]);
> + ut_asserteq_strn("FRED", (char *)ptr + 4);
> + ut_asserteq(1 << 3 | nargs, ptr[8]);
> + ut_asserteq(1, ctx->ltop); /* method is unfinished */
> +
> + ptr += 9;
> + acpigen_write_or(ctx, LOCAL0_OP, LOCAL1_OP, LOCAL2_OP);
> + acpigen_write_and(ctx, LOCAL3_OP, LOCAL4_OP, LOCAL5_OP);
> + acpigen_write_not(ctx, LOCAL6_OP, LOCAL7_OP);
> + ut_asserteq(OR_OP, ptr[0]);
> + ut_asserteq(LOCAL0_OP, ptr[1]);
> + ut_asserteq(LOCAL1_OP, ptr[2]);
> + ut_asserteq(LOCAL2_OP, ptr[3]);
> +
> + ptr += 4;
> + ut_asserteq(AND_OP, ptr[0]);
> + ut_asserteq(LOCAL3_OP, ptr[1]);
> + ut_asserteq(LOCAL4_OP, ptr[2]);
> + ut_asserteq(LOCAL5_OP, ptr[3]);
> +
> + ptr += 4;
> + ut_asserteq(NOT_OP, ptr[0]);
> + ut_asserteq(LOCAL6_OP, ptr[1]);
> + ut_asserteq(LOCAL7_OP, ptr[2]);
> + ptr += 3;
> + ut_asserteq_ptr(ptr, ctx->current);
> +
> + free_context(&ctx);
> +
> + return 0;
> +}
> +DM_TEST(dm_test_acpi_misc, 0);
> --
> 2.26.2.645.ge9eca65c58-goog
>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner at br-automation.com>
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