acpi: Add a method to write tables for a device

A device may want to write out ACPI tables to describe itself to Linux.
Add a method to permit this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>

1 files changed, 71 insertions, 3 deletions

diff --git a/test/dm/acpi.c b/test/dm/acpi.c
index e7b8abd556..fb7b7e46b2 100644
--- a/test/dm/acpi.c
+++ b/test/dm/acpi.c
@@ -8,12 +8,26 @@
 
 #include <common.h>
 #include <dm.h>
+#include <version.h>
 #include <acpi/acpi_table.h>
 #include <dm/acpi.h>
 #include <dm/test.h>
 #include <test/ut.h>
 
 #define ACPI_TEST_DEV_NAME	"ABCD"
+#define BUF_SIZE		4096
+
+static int testacpi_write_tables(const struct udevice *dev,
+				 struct acpi_ctx *ctx)
+{
+	struct acpi_dmar *dmar;
+
+	dmar = (struct acpi_dmar *)ctx->current;
+	acpi_create_dmar(dmar, DMAR_INTR_REMAP);
+	ctx->current += sizeof(struct acpi_dmar);
+
+	return 0;
+}
 
 static int testacpi_get_name(const struct udevice *dev, char *out_name)
 {
@@ -22,6 +36,7 @@ static int testacpi_get_name(const struct udevice *dev, char *out_name)
 
 struct acpi_ops testacpi_ops = {
 	.get_name	= testacpi_get_name,
+	.write_tables	= testacpi_write_tables,
 };
 
 static const struct udevice_id testacpi_ids[] = {
@@ -68,8 +83,6 @@ static int dm_test_acpi_get_table_revision(struct unit_test_state *uts)
 DM_TEST(dm_test_acpi_get_table_revision,
 	DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 
-/* Temporary change to ensure bisectability */
-#ifndef CONFIG_SANDBOX
 /* Test acpi_create_dmar() */
 static int dm_test_acpi_create_dmar(struct unit_test_state *uts)
 {
@@ -82,4 +95,59 @@ static int dm_test_acpi_create_dmar(struct unit_test_state *uts)
 	return 0;
 }
 DM_TEST(dm_test_acpi_create_dmar, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
-#endif
+
+/* Test acpi_fill_header() */
+static int dm_test_acpi_fill_header(struct unit_test_state *uts)
+{
+	struct acpi_table_header hdr;
+
+	/* Make sure these 5 fields are not changed */
+	hdr.length = 0x11;
+	hdr.revision = 0x22;
+	hdr.checksum = 0x33;
+	hdr.aslc_revision = 0x44;
+	acpi_fill_header(&hdr, "ABCD");
+
+	ut_asserteq_mem("ABCD", hdr.signature, sizeof(hdr.signature));
+	ut_asserteq(0x11, hdr.length);
+	ut_asserteq(0x22, hdr.revision);
+	ut_asserteq(0x33, hdr.checksum);
+	ut_asserteq_mem(OEM_ID, hdr.oem_id, sizeof(hdr.oem_id));
+	ut_asserteq_mem(OEM_TABLE_ID, hdr.oem_table_id,
+			sizeof(hdr.oem_table_id));
+	ut_asserteq(U_BOOT_BUILD_DATE, hdr.oem_revision);
+	ut_asserteq_mem(ASLC_ID, hdr.aslc_id, sizeof(hdr.aslc_id));
+	ut_asserteq(0x44, hdr.aslc_revision);
+
+	return 0;
+}
+DM_TEST(dm_test_acpi_fill_header, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+
+/* Test ACPI write_tables() */
+static int dm_test_acpi_write_tables(struct unit_test_state *uts)
+{
+	struct acpi_dmar *dmar;
+	struct acpi_ctx ctx;
+	void *buf;
+
+	buf = malloc(BUF_SIZE);
+	ut_assertnonnull(buf);
+
+	ctx.current = buf;
+	ut_assertok(acpi_write_dev_tables(&ctx));
+	dmar = buf;
+
+	/*
+	 * We should have two dmar tables, one for each "denx,u-boot-acpi-test"
+	 * device
+	 */
+	ut_asserteq_ptr(dmar + 2, ctx.current);
+	ut_asserteq(DMAR_INTR_REMAP, dmar->flags);
+	ut_asserteq(32 - 1, dmar->host_address_width);
+
+	ut_asserteq(DMAR_INTR_REMAP, dmar[1].flags);
+	ut_asserteq(32 - 1, dmar[1].host_address_width);
+
+	return 0;
+}
+DM_TEST(dm_test_acpi_write_tables, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);