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acpi: Support writing a name

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ACPI supports storing names which are made up of multiple path components.
Several special cases are supported. Add a function to emit a name.

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
2020-07-07 13:11:54 -06:00
committed by Bin Meng
parent 3df33bda5c
commit 7aed90d44c
4 changed files with 231 additions and 0 deletions
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93
test/dm/acpigen.c
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@@ -505,3 +505,96 @@ static int dm_test_acpi_string(struct unit_test_state *uts)
return 0;
}
DM_TEST(dm_test_acpi_string, 0);
/* Test writing a name */
static int dm_test_acpi_name(struct unit_test_state *uts)
{
struct acpi_ctx *ctx;
u8 *ptr;
ut_assertok(alloc_context(&ctx));
ptr = acpigen_get_current(ctx);
/*
* The names here are made up for testing the various cases. The
* grammar is in the ACPI spec 6.3 section 19.2.2
*/
acpigen_write_name(ctx, "\\_SB");
acpigen_write_name(ctx, "\\_SB.I2C0");
acpigen_write_name(ctx, "\\_SB.I2C0.TPM2");
acpigen_write_name(ctx, "\\_SB.I2C0.TPM2.LONG");
acpigen_write_name(ctx, "^^^^SPI0.FLAS");
acpigen_write_name(ctx, "NN");
acpigen_write_name(ctx, "^AB.CD.D.EFG");
acpigen_write_name(ctx, "^^^^");
acpigen_write_name(ctx, "\\");
acpigen_write_name(ctx, "\\ABCD");
ut_asserteq(107, acpigen_get_current(ctx) - ptr);
ut_asserteq(NAME_OP, ptr[0]);
ut_asserteq_strn("\\_SB_", (char *)ptr + 1);
ptr += 6;
ut_asserteq(NAME_OP, ptr[0]);
ut_asserteq('\\', ptr[1]);
ut_asserteq(DUAL_NAME_PREFIX, ptr[2]);
ut_asserteq_strn("_SB_I2C0", (char *)ptr + 3);
ptr += 11;
ut_asserteq(NAME_OP, ptr[0]);
ut_asserteq('\\', ptr[1]);
ut_asserteq(MULTI_NAME_PREFIX, ptr[2]);
ut_asserteq(3, ptr[3]);
ut_asserteq_strn("_SB_I2C0TPM2", (char *)ptr + 4);
ptr += 16;
ut_asserteq(NAME_OP, ptr[0]);
ut_asserteq('\\', ptr[1]);
ut_asserteq(MULTI_NAME_PREFIX, ptr[2]);
ut_asserteq(4, ptr[3]);
ut_asserteq_strn("_SB_I2C0TPM2LONG", (char *)ptr + 4);
ptr += 20;
ut_asserteq(NAME_OP, ptr[0]);
ut_asserteq('^', ptr[1]);
ut_asserteq('^', ptr[2]);
ut_asserteq('^', ptr[3]);
ut_asserteq('^', ptr[4]);
ut_asserteq(DUAL_NAME_PREFIX, ptr[5]);
ut_asserteq_strn("SPI0FLAS", (char *)ptr + 6);
ptr += 14;
ut_asserteq(NAME_OP, ptr[0]);
ut_asserteq_strn("NN__", (char *)ptr + 1);
ptr += 5;
ut_asserteq(NAME_OP, ptr[0]);
ut_asserteq('^', ptr[1]);
ut_asserteq(MULTI_NAME_PREFIX, ptr[2]);
ut_asserteq(4, ptr[3]);
ut_asserteq_strn("AB__CD__D___EFG_", (char *)ptr + 4);
ptr += 20;
ut_asserteq(NAME_OP, ptr[0]);
ut_asserteq('^', ptr[1]);
ut_asserteq('^', ptr[2]);
ut_asserteq('^', ptr[3]);
ut_asserteq('^', ptr[4]);
ut_asserteq(ZERO_OP, ptr[5]);
ptr += 6;
ut_asserteq(NAME_OP, ptr[0]);
ut_asserteq('\\', ptr[1]);
ut_asserteq(ZERO_OP, ptr[2]);
ptr += 3;
ut_asserteq(NAME_OP, ptr[0]);
ut_asserteq_strn("\\ABCD", (char *)ptr + 1);
ptr += 5;
free_context(&ctx);
return 0;
}
DM_TEST(dm_test_acpi_name, 0);