[PATCH 026/108] acpi: Move the xsdt pointer to acpi_ctx

[Simon Glass]

Put this in the context along with the other important pointers.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 include/dm/acpi.h     |  2 ++
 lib/acpi/acpi_table.c | 38 ++++++++++++++++----------------------
 test/dm/acpi.c        |  5 +++++
 3 files changed, 23 insertions(+), 22 deletions(-)

diff --git a/include/dm/acpi.h b/include/dm/acpi.h
index 4465e62848..f3e9d73b78 100644
--- a/include/dm/acpi.h
+++ b/include/dm/acpi.h
@@ -33,11 +33,13 @@
  * @rsdp: Pointer to the Root System Description Pointer, typically used when
  *	adding a new table. The RSDP holds pointers to the RSDP and XSDT.
  * @rsdt: Pointer to the Root System Description Table
+ * @xsdt: Pointer to the Extended System Description Table
  */
 struct acpi_ctx {
 	void *current;
 	struct acpi_rsdp *rsdp;
 	struct acpi_rsdt *rsdt;
+	struct acpi_xsdt *xsdt;
 };
 
 /**
diff --git a/lib/acpi/acpi_table.c b/lib/acpi/acpi_table.c
index 92df07ac99..92466276d1 100644
--- a/lib/acpi/acpi_table.c
+++ b/lib/acpi/acpi_table.c
@@ -126,13 +126,11 @@ int acpi_add_table(struct acpi_ctx *ctx, void *table)
 {
 	int i, entries_num;
 	struct acpi_rsdt *rsdt;
-	struct acpi_xsdt *xsdt = NULL;
+	struct acpi_xsdt *xsdt;
 
 	/* The RSDT is mandatory while the XSDT is not */
 	rsdt = ctx->rsdt;
-
-	if (ctx->rsdp->xsdt_address)
-		xsdt = map_sysmem(ctx->rsdp->xsdt_address, 0);
+	xsdt = ctx->xsdt;
 
 	/* This should always be MAX_ACPI_TABLES */
 	entries_num = ARRAY_SIZE(rsdt->entry);
@@ -163,19 +161,17 @@ int acpi_add_table(struct acpi_ctx *ctx, void *table)
 	 * And now the same thing for the XSDT. We use the same index as for
 	 * now we want the XSDT and RSDT to always be in sync in U-Boot
 	 */
-	if (xsdt) {
-		/* Add table to the XSDT */
-		xsdt->entry[i] = map_to_sysmem(table);
-
-		/* Fix XSDT length */
-		xsdt->header.length = sizeof(struct acpi_table_header) +
-			(sizeof(u64) * (i + 1));
-
-		/* Re-calculate checksum */
-		xsdt->header.checksum = 0;
-		xsdt->header.checksum =
-			table_compute_checksum((xsdt, xsdt->header.length);
-	}
+	/* Add table to the XSDT */
+	xsdt->entry[i] = map_to_sysmem(table);
+
+	/* Fix XSDT length */
+	xsdt->header.length = sizeof(struct acpi_table_header) +
+		(sizeof(u64) * (i + 1));
+
+	/* Re-calculate checksum */
+	xsdt->header.checksum = 0;
+	xsdt->header.checksum = table_compute_checksum(xsdt,
+						       xsdt->header.length);
 
 	return 0;
 }
@@ -234,8 +230,6 @@ static void acpi_write_xsdt(struct acpi_xsdt *xsdt)
 
 void acpi_setup_base_tables(struct acpi_ctx *ctx, void *start)
 {
-	struct acpi_xsdt *xsdt;
-
 	ctx->current = start;
 
 	/* Align ACPI tables to 16 byte */
@@ -246,7 +240,7 @@ void acpi_setup_base_tables(struct acpi_ctx *ctx, void *start)
 	acpi_inc_align(ctx, sizeof(struct acpi_rsdp));
 	ctx->rsdt = ctx->current;
 	acpi_inc_align(ctx, sizeof(struct acpi_rsdt));
-	xsdt = ctx->current;
+	ctx->xsdt = ctx->current;
 	acpi_inc_align(ctx, sizeof(struct acpi_xsdt));
 	/*
 	 * Per ACPI spec, the FACS table address must be aligned to a 64 byte
@@ -257,7 +251,7 @@ void acpi_setup_base_tables(struct acpi_ctx *ctx, void *start)
 	/* clear all table memory */
 	memset((void *)start, '\0', ctx->current - start);
 
-	acpi_write_rsdp(ctx->rsdp, ctx->rsdt, xsdt);
+	acpi_write_rsdp(ctx->rsdp, ctx->rsdt, ctx->xsdt);
 	acpi_write_rsdt(ctx->rsdt);
-	acpi_write_xsdt(xsdt);
+	acpi_write_xsdt(ctx->xsdt);
 }
diff --git a/test/dm/acpi.c b/test/dm/acpi.c
index bb66c7229c..a60f67e73d 100644
--- a/test/dm/acpi.c
+++ b/test/dm/acpi.c
@@ -161,6 +161,10 @@ static int dm_test_acpi_write_tables(struct unit_test_state *uts)
 	ut_asserteq(map_to_sysmem(dmar + 1), ctx.rsdt->entry[1]);
 	ut_asserteq(0, ctx.rsdt->entry[2]);
 
+	ut_asserteq(map_to_sysmem(dmar), ctx.xsdt->entry[0]);
+	ut_asserteq(map_to_sysmem(dmar + 1), ctx.xsdt->entry[1]);
+	ut_asserteq(0, ctx.xsdt->entry[2]);
+
 	return 0;
 }
 DM_TEST(dm_test_acpi_write_tables, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
@@ -221,6 +225,7 @@ static int dm_test_acpi_setup_base_tables(struct unit_test_state *uts)
 	ut_assertok(table_compute_checksum(rsdt, sizeof(*rsdt)));
 
 	xsdt = PTR_ALIGN((void *)rsdt + sizeof(*rsdt), 16);
+	ut_asserteq_ptr(xsdt, ctx.xsdt);
 	ut_assertok(memcmp("XSDT", xsdt->header.signature, ACPI_NAME_LEN));
 	ut_asserteq(sizeof(*xsdt), xsdt->header.length);
 	ut_assertok(table_compute_checksum(xsdt, sizeof(*xsdt)));
-- 
2.25.0.341.g760bfbb309-goog