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acpi: Support generation of a scope

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Add a function to write a scope to the generated ACPI code.

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>
[bmeng: Fix build failures on Sandbox]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-07-07 21:32:10 -06:00 • committed by Bin Meng
parent fea9651084
commit 82659cc910
5 changed files with 51 additions and 2 deletions
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9
include/acpi/acpigen.h
View file

@ -31,6 +31,7 @@ enum {
DWORD_PREFIX = 0x0c,
STRING_PREFIX = 0x0d,
QWORD_PREFIX = 0x0e,
SCOPE_OP = 0x10,
BUFFER_OP = 0x11,
PACKAGE_OP = 0x12,
METHOD_OP = 0x14,
@ -261,6 +262,14 @@ void acpigen_emit_namestring(struct acpi_ctx *ctx, const char *namepath);
*/
void acpigen_write_name(struct acpi_ctx *ctx, const char *namepath);
/**
* acpigen_write_scope() - Write a scope
*
* @ctx: ACPI context pointer
* @scope: Scope to write (e.g. "\\_SB.ABCD")
*/
void acpigen_write_scope(struct acpi_ctx *ctx, const char *scope);
/**
* acpigen_write_uuid() - Write a UUID
*

7
lib/acpi/acpigen.c
View file

@ -258,6 +258,13 @@ void acpigen_write_name(struct acpi_ctx *ctx, const char *namepath)
acpigen_emit_namestring(ctx, namepath);
}
void acpigen_write_scope(struct acpi_ctx *ctx, const char *scope)
{
acpigen_emit_byte(ctx, SCOPE_OP);
acpigen_write_len_f(ctx);
acpigen_emit_namestring(ctx, scope);
}
static void acpigen_write_method_internal(struct acpi_ctx *ctx,
const char *name, uint flags)
{

3
test/dm/acpi.c
View file

@ -20,9 +20,8 @@
#include <dm/acpi.h>
#include <dm/test.h>
#include <test/ut.h>
#include "acpi.h"
#define ACPI_TEST_DEV_NAME "ABCD"
#define ACPI_TEST_CHILD_NAME "EFGH"
#define BUF_SIZE 4096
/**

3
test/dm/acpi.h
View file

@ -9,6 +9,9 @@
#ifndef __TEST_DM_ACPI_H
#define __TEST_DM_ACPI_H
#define ACPI_TEST_DEV_NAME "ABCD"
#define ACPI_TEST_CHILD_NAME "EFGH"
/**
* acpi_test_alloc_context_size() - Allocate an ACPI context of a given size
*

31
test/dm/acpigen.c
View file

@ -916,3 +916,34 @@ static int dm_test_acpi_write_values(struct unit_test_state *uts)
return 0;
}
DM_TEST(dm_test_acpi_write_values, 0);
/* Test writing a scope */
static int dm_test_acpi_scope(struct unit_test_state *uts)
{
char buf[ACPI_PATH_MAX];
struct acpi_ctx *ctx;
struct udevice *dev;
u8 *ptr;
ut_assertok(alloc_context(&ctx));
ptr = acpigen_get_current(ctx);
ut_assertok(uclass_first_device_err(UCLASS_TEST_ACPI, &dev));
ut_assertok(acpi_device_path(dev, buf, sizeof(buf)));
acpigen_write_scope(ctx, buf);
acpigen_pop_len(ctx);
ut_asserteq(SCOPE_OP, *ptr++);
ut_asserteq(13, acpi_test_get_length(ptr));
ptr += 3;
ut_asserteq(ROOT_PREFIX, *ptr++);
ut_asserteq(DUAL_NAME_PREFIX, *ptr++);
ut_asserteq_strn("_SB_" ACPI_TEST_DEV_NAME, (char *)ptr);
ptr += 8;
ut_asserteq_ptr(ptr, ctx->current);
free_context(&ctx);
return 0;
}
DM_TEST(dm_test_acpi_scope, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);