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https://github.com/AsahiLinux/u-boot
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acpi: Add support for various misc ACPI opcodes
Add more functions to handle some miscellaneous ACPI opcodes. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass
Bin Meng
parent
0667900049
commit
9c70e7e556
3 changed files with 278 additions and 0 deletions
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@ -17,6 +17,9 @@ struct acpi_ctx;
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/* Top 4 bits of the value used to indicate a three-byte length value */
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#define ACPI_PKG_LEN_3_BYTES 0x80
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#define ACPI_METHOD_NARGS_MASK 0x7
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#define ACPI_METHOD_SERIALIZED_MASK BIT(3)
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/* ACPI Op/Prefix codes */
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enum {
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ZERO_OP = 0x00,
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@ -29,9 +32,26 @@ enum {
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QWORD_PREFIX = 0x0e,
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BUFFER_OP = 0x11,
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PACKAGE_OP = 0x12,
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METHOD_OP = 0x14,
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SLEEP_OP = 0x22,
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DUAL_NAME_PREFIX = 0x2e,
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MULTI_NAME_PREFIX = 0x2f,
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DEBUG_OP = 0x31,
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EXT_OP_PREFIX = 0x5b,
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ROOT_PREFIX = 0x5c,
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LOCAL0_OP = 0x60,
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LOCAL1_OP = 0x61,
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LOCAL2_OP = 0x62,
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LOCAL3_OP = 0x63,
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LOCAL4_OP = 0x64,
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LOCAL5_OP = 0x65,
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LOCAL6_OP = 0x66,
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LOCAL7_OP = 0x67,
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STORE_OP = 0x70,
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AND_OP = 0x7b,
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OR_OP = 0x7d,
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NOT_OP = 0x80,
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RETURN_OP = 0xa4,
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};
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/**
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@ -204,4 +224,101 @@ void acpigen_write_name(struct acpi_ctx *ctx, const char *namepath);
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*/
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int acpigen_write_uuid(struct acpi_ctx *ctx, const char *uuid);
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/**
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* acpigen_emit_ext_op() - Emit an extended op with the EXT_OP_PREFIX prefix
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*
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* @ctx: ACPI context pointer
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* @op: Operation code (e.g. SLEEP_OP)
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*/
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void acpigen_emit_ext_op(struct acpi_ctx *ctx, uint op);
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/**
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* acpigen_write_method() - Write a method header
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*
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* @ctx: ACPI context pointer
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* @name: Method name (4 characters)
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* @nargs: Number of method arguments (0 if none)
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*/
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void acpigen_write_method(struct acpi_ctx *ctx, const char *name, int nargs);
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/**
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* acpigen_write_method_serialized() - Write a method header
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*
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* This sets the 'serialized' flag so that the method is thread-safe
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*
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* @ctx: ACPI context pointer
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* @name: Method name (4 characters)
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* @nargs: Number of method arguments (0 if none)
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*/
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void acpigen_write_method_serialized(struct acpi_ctx *ctx, const char *name,
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int nargs);
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/**
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* acpigen_write_sta() - Write a _STA method
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*
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* @ctx: ACPI context pointer
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* @status: Status value to return
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*/
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void acpigen_write_sta(struct acpi_ctx *ctx, uint status);
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/**
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* acpigen_write_sleep() - Write a sleep operation
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*
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* @ctx: ACPI context pointer
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* @sleep_ms: Number of milliseconds to sleep for
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*/
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void acpigen_write_sleep(struct acpi_ctx *ctx, u64 sleep_ms);
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/**
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* acpigen_write_store() - Write a store operation
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*
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* @ctx: ACPI context pointer
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*/
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void acpigen_write_store(struct acpi_ctx *ctx);
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/**
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* acpigen_write_debug_string() - Write a debug string
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*
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* This writes a debug operation with an associated string
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*
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* @ctx: ACPI context pointer
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* @str: String to write
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*/
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void acpigen_write_debug_string(struct acpi_ctx *ctx, const char *str);
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/**
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* acpigen_write_or() - Write a bitwise OR operation
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*
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* res = arg1 | arg2
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*
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* @ctx: ACPI context pointer
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* @arg1: ACPI opcode for operand 1 (e.g. LOCAL0_OP)
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* @arg2: ACPI opcode for operand 2 (e.g. LOCAL1_OP)
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* @res: ACPI opcode for result (e.g. LOCAL2_OP)
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*/
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void acpigen_write_or(struct acpi_ctx *ctx, u8 arg1, u8 arg2, u8 res);
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/**
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* acpigen_write_and() - Write a bitwise AND operation
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*
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* res = arg1 & arg2
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*
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* @ctx: ACPI context pointer
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* @arg1: ACPI opcode for operand 1 (e.g. LOCAL0_OP)
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* @arg2: ACPI opcode for operand 2 (e.g. LOCAL1_OP)
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* @res: ACPI opcode for result (e.g. LOCAL2_OP)
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*/
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void acpigen_write_and(struct acpi_ctx *ctx, u8 arg1, u8 arg2, u8 res);
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/**
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* acpigen_write_not() - Write a bitwise NOT operation
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*
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* res = ~arg1
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*
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* @ctx: ACPI context pointer
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* @arg: ACPI opcode for operand (e.g. LOCAL0_OP)
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* @res: ACPI opcode for result (e.g. LOCAL2_OP)
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*/
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void acpigen_write_not(struct acpi_ctx *ctx, u8 arg, u8 res);
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#endif
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@ -72,6 +72,12 @@ void acpigen_pop_len(struct acpi_ctx *ctx)
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p[2] = len >> 12 & 0xff;
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}
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void acpigen_emit_ext_op(struct acpi_ctx *ctx, uint op)
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{
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acpigen_emit_byte(ctx, EXT_OP_PREFIX);
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acpigen_emit_byte(ctx, op);
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}
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char *acpigen_write_package(struct acpi_ctx *ctx, int nr_el)
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{
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char *p;
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@ -251,6 +257,40 @@ void acpigen_write_name(struct acpi_ctx *ctx, const char *namepath)
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acpigen_emit_namestring(ctx, namepath);
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}
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static void acpigen_write_method_internal(struct acpi_ctx *ctx,
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const char *name, uint flags)
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{
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acpigen_emit_byte(ctx, METHOD_OP);
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acpigen_write_len_f(ctx);
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acpigen_emit_namestring(ctx, name);
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acpigen_emit_byte(ctx, flags);
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}
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/* Method (name, nargs, NotSerialized) */
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void acpigen_write_method(struct acpi_ctx *ctx, const char *name, int nargs)
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{
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acpigen_write_method_internal(ctx, name,
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nargs & ACPI_METHOD_NARGS_MASK);
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}
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/* Method (name, nargs, Serialized) */
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void acpigen_write_method_serialized(struct acpi_ctx *ctx, const char *name,
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int nargs)
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{
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acpigen_write_method_internal(ctx, name,
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(nargs & ACPI_METHOD_NARGS_MASK) |
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ACPI_METHOD_SERIALIZED_MASK);
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}
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void acpigen_write_sta(struct acpi_ctx *ctx, uint status)
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{
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/* Method (_STA, 0, NotSerialized) { Return (status) } */
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acpigen_write_method(ctx, "_STA", 0);
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acpigen_emit_byte(ctx, RETURN_OP);
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acpigen_write_byte(ctx, status);
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acpigen_pop_len(ctx);
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}
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/*
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* ToUUID(uuid)
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*
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@ -287,3 +327,49 @@ int acpigen_write_uuid(struct acpi_ctx *ctx, const char *uuid)
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return 0;
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}
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/* Sleep (ms) */
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void acpigen_write_sleep(struct acpi_ctx *ctx, u64 sleep_ms)
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{
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acpigen_emit_ext_op(ctx, SLEEP_OP);
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acpigen_write_integer(ctx, sleep_ms);
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}
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void acpigen_write_store(struct acpi_ctx *ctx)
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{
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acpigen_emit_byte(ctx, STORE_OP);
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}
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/* Or (arg1, arg2, res) */
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void acpigen_write_or(struct acpi_ctx *ctx, u8 arg1, u8 arg2, u8 res)
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{
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acpigen_emit_byte(ctx, OR_OP);
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acpigen_emit_byte(ctx, arg1);
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acpigen_emit_byte(ctx, arg2);
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acpigen_emit_byte(ctx, res);
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}
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/* And (arg1, arg2, res) */
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void acpigen_write_and(struct acpi_ctx *ctx, u8 arg1, u8 arg2, u8 res)
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{
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acpigen_emit_byte(ctx, AND_OP);
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acpigen_emit_byte(ctx, arg1);
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acpigen_emit_byte(ctx, arg2);
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acpigen_emit_byte(ctx, res);
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}
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/* Not (arg, res) */
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void acpigen_write_not(struct acpi_ctx *ctx, u8 arg, u8 res)
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{
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acpigen_emit_byte(ctx, NOT_OP);
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acpigen_emit_byte(ctx, arg);
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acpigen_emit_byte(ctx, res);
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}
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/* Store (str, DEBUG) */
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void acpigen_write_debug_string(struct acpi_ctx *ctx, const char *str)
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{
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acpigen_write_store(ctx);
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acpigen_write_string(ctx, str);
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acpigen_emit_ext_op(ctx, DEBUG_OP);
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}
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@ -626,3 +626,78 @@ static int dm_test_acpi_uuid(struct unit_test_state *uts)
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return 0;
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}
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DM_TEST(dm_test_acpi_uuid, 0);
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/* Test writing misc ACPI codes */
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static int dm_test_acpi_misc(struct unit_test_state *uts)
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{
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struct acpi_ctx *ctx;
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const int flags = 3;
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const int nargs = 4;
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u8 *ptr;
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ut_assertok(alloc_context(&ctx));
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ptr = acpigen_get_current(ctx);
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acpigen_write_sleep(ctx, TEST_INT64);
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ut_asserteq_64(TEST_INT64, get_unaligned((u64 *)(ptr + 3)));
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ptr += 11;
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acpigen_write_store(ctx);
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ut_asserteq(STORE_OP, *ptr);
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ptr++;
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acpigen_write_debug_string(ctx, TEST_STRING);
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ut_asserteq_str(TEST_STRING, (char *)ptr + 2);
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ptr += 2 + sizeof(TEST_STRING);
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ut_asserteq(EXT_OP_PREFIX, ptr[0]);
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ut_asserteq(DEBUG_OP, ptr[1]);
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ptr += 2;
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acpigen_write_sta(ctx, flags);
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ut_asserteq(METHOD_OP, ptr[0]);
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ut_asserteq(11, acpi_test_get_length(ptr + 1));
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ut_asserteq_strn("_STA", (char *)ptr + 4);
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ut_asserteq(0, ptr[8]);
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ut_asserteq(RETURN_OP, ptr[9]);
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ut_asserteq(BYTE_PREFIX, ptr[10]);
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ut_asserteq(flags, ptr[11]);
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ptr += 12;
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acpigen_write_sleep(ctx, TEST_INT16);
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ut_asserteq(SLEEP_OP, ptr[1]);
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ut_asserteq(TEST_INT16, get_unaligned((u16 *)(ptr + 3)));
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ptr += 5;
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acpigen_write_method_serialized(ctx, "FRED", nargs);
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ut_asserteq(METHOD_OP, ptr[0]);
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ut_asserteq_strn("FRED", (char *)ptr + 4);
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ut_asserteq(1 << 3 | nargs, ptr[8]);
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ut_asserteq(1, ctx->ltop); /* method is unfinished */
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ptr += 9;
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acpigen_write_or(ctx, LOCAL0_OP, LOCAL1_OP, LOCAL2_OP);
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acpigen_write_and(ctx, LOCAL3_OP, LOCAL4_OP, LOCAL5_OP);
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acpigen_write_not(ctx, LOCAL6_OP, LOCAL7_OP);
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ut_asserteq(OR_OP, ptr[0]);
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ut_asserteq(LOCAL0_OP, ptr[1]);
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ut_asserteq(LOCAL1_OP, ptr[2]);
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ut_asserteq(LOCAL2_OP, ptr[3]);
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ptr += 4;
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ut_asserteq(AND_OP, ptr[0]);
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ut_asserteq(LOCAL3_OP, ptr[1]);
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ut_asserteq(LOCAL4_OP, ptr[2]);
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ut_asserteq(LOCAL5_OP, ptr[3]);
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ptr += 4;
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ut_asserteq(NOT_OP, ptr[0]);
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ut_asserteq(LOCAL6_OP, ptr[1]);
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ut_asserteq(LOCAL7_OP, ptr[2]);
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ptr += 3;
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ut_asserteq_ptr(ptr, ctx->current);
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free_context(&ctx);
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return 0;
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}
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DM_TEST(dm_test_acpi_misc, 0);
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