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acpi: Add support for conditions and return values

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Add functions to support generating ACPI code for condition checks and
return values.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-09-22 12:44:57 -06:00 committed by Bin Meng
parent e0a896b88f
commit da7cff338f
3 changed files with 252 additions and 0 deletions
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93
include/acpi/acpigen.h
View file

@ -52,12 +52,24 @@ enum {
LOCAL5_OP = 0x65,
LOCAL6_OP = 0x66,
LOCAL7_OP = 0x67,
ARG0_OP = 0x68,
ARG1_OP = 0x69,
ARG2_OP = 0x6a,
ARG3_OP = 0x6b,
ARG4_OP = 0x6c,
ARG5_OP = 0x6d,
ARG6_OP = 0x6e,
STORE_OP = 0x70,
AND_OP = 0x7b,
OR_OP = 0x7d,
NOT_OP = 0x80,
DEVICE_OP = 0x82,
POWER_RES_OP = 0x84,
LEQUAL_OP = 0x93,
TO_BUFFER_OP = 0x96,
TO_INTEGER_OP = 0x99,
IF_OP = 0xa0,
ELSE_OP = 0xa1,
RETURN_OP = 0xa4,
};
@ -573,4 +585,85 @@ int acpigen_set_enable_tx_gpio(struct acpi_ctx *ctx, u32 tx_state_val,
*/
void acpigen_write_prw(struct acpi_ctx *ctx, uint wake, uint level);
/**
* acpigen_write_if() - Write an If block
*
* This requires a call to acpigen_pop_len() to complete the block
*
* @ctx: ACPI context pointer
*/
void acpigen_write_if(struct acpi_ctx *ctx);
/**
* acpigen_write_if_lequal_op_int() - Write comparison between op and integer
*
* Generates ACPI code for checking if operand1 and operand2 are equal
*
* If (Lequal (op, val))
*
* @ctx: ACPI context pointer
* @op: Operand to check
* @val: Value to check against
*/
void acpigen_write_if_lequal_op_int(struct acpi_ctx *ctx, uint op, u64 val);
/**
* acpigen_write_else() - Write an Ef block
*
* This requires a call to acpigen_pop_len() to complete the block
*
* @ctx: ACPI context pointer
*/
void acpigen_write_else(struct acpi_ctx *ctx);
/**
* acpigen_write_to_buffer() - Write a ToBuffer operation
*
* E.g.: to generate: ToBuffer (Arg0, Local0)
* use acpigen_write_to_buffer(ctx, ARG0_OP, LOCAL0_OP)
*
* @ctx: ACPI context pointer
* @src: Source argument
* @dst: Destination argument
*/
void acpigen_write_to_buffer(struct acpi_ctx *ctx, uint src, uint dst);
/**
* acpigen_write_to_integer() - Write a ToInteger operation
*
* E.g.: to generate: ToInteger (Arg0, Local0)
* use acpigen_write_to_integer(ctx, ARG0_OP, LOCAL0_OP)
*
* @ctx: ACPI context pointer
* @src: Source argument
* @dst: Destination argument
*/
void acpigen_write_to_integer(struct acpi_ctx *ctx, uint src, uint dst);
/**
* acpigen_write_return_byte_buffer() - Write a return of a byte buffer
*
* @ctx: ACPI context pointer
* @arr: Array of bytes to return
* @size: Number of bytes
*/
void acpigen_write_return_byte_buffer(struct acpi_ctx *ctx, u8 *arr,
size_t size);
/**
* acpigen_write_return_singleton_buffer() - Write a return of a 1-byte buffer
*
* @ctx: ACPI context pointer
* @arg: Byte to return
*/
void acpigen_write_return_singleton_buffer(struct acpi_ctx *ctx, uint arg);
/**
* acpigen_write_return_byte() - Write a return of a byte
*
* @ctx: ACPI context pointer
* @arg: Byte to return
*/
void acpigen_write_return_byte(struct acpi_ctx *ctx, uint arg);
#endif

68
lib/acpi/acpigen.c
View file

@ -541,6 +541,74 @@ void acpigen_write_debug_string(struct acpi_ctx *ctx, const char *str)
acpigen_emit_ext_op(ctx, DEBUG_OP);
}
void acpigen_write_if(struct acpi_ctx *ctx)
{
acpigen_emit_byte(ctx, IF_OP);
acpigen_write_len_f(ctx);
}
void acpigen_write_if_lequal_op_int(struct acpi_ctx *ctx, uint op, u64 val)
{
acpigen_write_if(ctx);
acpigen_emit_byte(ctx, LEQUAL_OP);
acpigen_emit_byte(ctx, op);
acpigen_write_integer(ctx, val);
}
void acpigen_write_else(struct acpi_ctx *ctx)
{
acpigen_emit_byte(ctx, ELSE_OP);
acpigen_write_len_f(ctx);
}
void acpigen_write_to_buffer(struct acpi_ctx *ctx, uint src, uint dst)
{
acpigen_emit_byte(ctx, TO_BUFFER_OP);
acpigen_emit_byte(ctx, src);
acpigen_emit_byte(ctx, dst);
}
void acpigen_write_to_integer(struct acpi_ctx *ctx, uint src, uint dst)
{
acpigen_emit_byte(ctx, TO_INTEGER_OP);
acpigen_emit_byte(ctx, src);
acpigen_emit_byte(ctx, dst);
}
void acpigen_write_byte_buffer(struct acpi_ctx *ctx, u8 *arr, size_t size)
{
size_t i;
acpigen_emit_byte(ctx, BUFFER_OP);
acpigen_write_len_f(ctx);
acpigen_write_integer(ctx, size);
for (i = 0; i < size; i++)
acpigen_emit_byte(ctx, arr[i]);
acpigen_pop_len(ctx);
}
void acpigen_write_return_byte_buffer(struct acpi_ctx *ctx, u8 *arr,
size_t size)
{
acpigen_emit_byte(ctx, RETURN_OP);
acpigen_write_byte_buffer(ctx, arr, size);
}
void acpigen_write_return_singleton_buffer(struct acpi_ctx *ctx, uint arg)
{
u8 buf = arg;
acpigen_write_return_byte_buffer(ctx, &buf, 1);
}
void acpigen_write_return_byte(struct acpi_ctx *ctx, uint arg)
{
acpigen_emit_byte(ctx, RETURN_OP);
acpigen_write_byte(ctx, arg);
}
/**
* acpigen_get_dw0_in_local5() - Generate code to put dw0 cfg0 in local5
*

91
test/dm/acpigen.c
View file

@ -1127,3 +1127,94 @@ static int dm_test_acpi_write_prw(struct unit_test_state *uts)
return 0;
}
DM_TEST(dm_test_acpi_write_prw, 0);
/* Test emitting writing conditionals */
static int dm_test_acpi_write_cond(struct unit_test_state *uts)
{
struct acpi_ctx *ctx;
u8 *ptr;
ut_assertok(alloc_context(&ctx));
ptr = acpigen_get_current(ctx);
acpigen_write_if(ctx);
acpigen_pop_len(ctx);
ut_asserteq(IF_OP, *ptr++);
ut_asserteq(3, acpi_test_get_length(ptr));
ptr += 3;
acpigen_write_else(ctx);
acpigen_pop_len(ctx);
ut_asserteq(ELSE_OP, *ptr++);
ut_asserteq(3, acpi_test_get_length(ptr));
ptr += 3;
acpigen_write_if_lequal_op_int(ctx, LOCAL1_OP, 5);
acpigen_pop_len(ctx);
ut_asserteq(IF_OP, *ptr++);
ut_asserteq(7, acpi_test_get_length(ptr));
ptr += 3;
ut_asserteq(LEQUAL_OP, *ptr++);
ut_asserteq(LOCAL1_OP, *ptr++);
ut_asserteq(BYTE_PREFIX, *ptr++);
ut_asserteq(5, *ptr++);
ut_asserteq_ptr(ptr, ctx->current);
free_context(&ctx);
return 0;
}
DM_TEST(dm_test_acpi_write_cond, 0);
/* Test emitting writing return values and ToBuffer/ToInteger */
static int dm_test_acpi_write_return(struct unit_test_state *uts)
{
int len = sizeof(TEST_STRING);
struct acpi_ctx *ctx;
u8 *ptr;
ut_assertok(alloc_context(&ctx));
ptr = acpigen_get_current(ctx);
acpigen_write_to_buffer(ctx, ARG0_OP, LOCAL0_OP);
ut_asserteq(TO_BUFFER_OP, *ptr++);
ut_asserteq(ARG0_OP, *ptr++);
ut_asserteq(LOCAL0_OP, *ptr++);
acpigen_write_to_integer(ctx, ARG0_OP, LOCAL0_OP);
ut_asserteq(TO_INTEGER_OP, *ptr++);
ut_asserteq(ARG0_OP, *ptr++);
ut_asserteq(LOCAL0_OP, *ptr++);
acpigen_write_return_byte_buffer(ctx, (u8 *)TEST_STRING, len);
ut_asserteq(RETURN_OP, *ptr++);
ut_asserteq(BUFFER_OP, *ptr++);
ut_asserteq(5 + len, acpi_test_get_length(ptr));
ptr += 3;
ut_asserteq(BYTE_PREFIX, *ptr++);
ut_asserteq(len, *ptr++);
ut_asserteq_mem(TEST_STRING, ptr, len);
ptr += len;
acpigen_write_return_singleton_buffer(ctx, 123);
len = 1;
ut_asserteq(RETURN_OP, *ptr++);
ut_asserteq(BUFFER_OP, *ptr++);
ut_asserteq(4 + len, acpi_test_get_length(ptr));
ptr += 3;
ut_asserteq(ONE_OP, *ptr++);
ut_asserteq(123, *ptr++);
acpigen_write_return_byte(ctx, 43);
ut_asserteq(RETURN_OP, *ptr++);
ut_asserteq(BYTE_PREFIX, *ptr++);
ut_asserteq(43, *ptr++);
ut_asserteq_ptr(ptr, ctx->current);
free_context(&ctx);
return 0;
}
DM_TEST(dm_test_acpi_write_return, 0);