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acpi: Support generation of a scope
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>
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5 changed files with 51 additions and 2 deletions
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@ -31,6 +31,7 @@ enum {
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DWORD_PREFIX = 0x0c,
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STRING_PREFIX = 0x0d,
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QWORD_PREFIX = 0x0e,
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SCOPE_OP = 0x10,
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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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@ -261,6 +262,14 @@ void acpigen_emit_namestring(struct acpi_ctx *ctx, const char *namepath);
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*/
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void acpigen_write_name(struct acpi_ctx *ctx, const char *namepath);
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/**
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* acpigen_write_scope() - Write a scope
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*
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* @ctx: ACPI context pointer
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* @scope: Scope to write (e.g. "\\_SB.ABCD")
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*/
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void acpigen_write_scope(struct acpi_ctx *ctx, const char *scope);
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/**
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* acpigen_write_uuid() - Write a UUID
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*
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@ -258,6 +258,13 @@ 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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void acpigen_write_scope(struct acpi_ctx *ctx, const char *scope)
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{
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acpigen_emit_byte(ctx, SCOPE_OP);
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acpigen_write_len_f(ctx);
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acpigen_emit_namestring(ctx, scope);
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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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@ -20,9 +20,8 @@
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#include <dm/acpi.h>
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#include <dm/test.h>
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#include <test/ut.h>
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#include "acpi.h"
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#define ACPI_TEST_DEV_NAME "ABCD"
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#define ACPI_TEST_CHILD_NAME "EFGH"
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#define BUF_SIZE 4096
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/**
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@ -9,6 +9,9 @@
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#ifndef __TEST_DM_ACPI_H
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#define __TEST_DM_ACPI_H
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#define ACPI_TEST_DEV_NAME "ABCD"
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#define ACPI_TEST_CHILD_NAME "EFGH"
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/**
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* acpi_test_alloc_context_size() - Allocate an ACPI context of a given size
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*
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@ -916,3 +916,34 @@ static int dm_test_acpi_write_values(struct unit_test_state *uts)
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return 0;
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}
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DM_TEST(dm_test_acpi_write_values, 0);
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/* Test writing a scope */
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static int dm_test_acpi_scope(struct unit_test_state *uts)
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{
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char buf[ACPI_PATH_MAX];
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struct acpi_ctx *ctx;
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struct udevice *dev;
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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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ut_assertok(uclass_first_device_err(UCLASS_TEST_ACPI, &dev));
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ut_assertok(acpi_device_path(dev, buf, sizeof(buf)));
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acpigen_write_scope(ctx, buf);
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acpigen_pop_len(ctx);
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ut_asserteq(SCOPE_OP, *ptr++);
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ut_asserteq(13, acpi_test_get_length(ptr));
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ptr += 3;
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ut_asserteq(ROOT_PREFIX, *ptr++);
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ut_asserteq(DUAL_NAME_PREFIX, *ptr++);
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ut_asserteq_strn("_SB_" ACPI_TEST_DEV_NAME, (char *)ptr);
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ptr += 8;
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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_scope, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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