[v3,26/29] acpi: Move acpi_add_table() to generic code

diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c
index 8c169f44938..d4af56eabf4 100644
--- a/arch/x86/lib/acpi_table.c
+++ b/arch/x86/lib/acpi_table.c
@@ -83,66 +83,6 @@  static void acpi_write_xsdt(struct acpi_xsdt *xsdt)
 			sizeof(struct acpi_xsdt));
 }
 
-/**
- * Add an ACPI table to the RSDT (and XSDT) structure, recalculate length
- * and checksum.
- */
-static void acpi_add_table(struct acpi_rsdp *rsdp, void *table)
-{
-	int i, entries_num;
-	struct acpi_rsdt *rsdt;
-	struct acpi_xsdt *xsdt = NULL;
-
-	/* The RSDT is mandatory while the XSDT is not */
-	rsdt = (struct acpi_rsdt *)rsdp->rsdt_address;
-
-	if (rsdp->xsdt_address)
-		xsdt = (struct acpi_xsdt *)((u32)rsdp->xsdt_address);
-
-	/* This should always be MAX_ACPI_TABLES */
-	entries_num = ARRAY_SIZE(rsdt->entry);
-
-	for (i = 0; i < entries_num; i++) {
-		if (rsdt->entry[i] == 0)
-			break;
-	}
-
-	if (i >= entries_num) {
-		debug("ACPI: Error: too many tables\n");
-		return;
-	}
-
-	/* Add table to the RSDT */
-	rsdt->entry[i] = (u32)table;
-
-	/* Fix RSDT length or the kernel will assume invalid entries */
-	rsdt->header.length = sizeof(struct acpi_table_header) +
-				(sizeof(u32) * (i + 1));
-
-	/* Re-calculate checksum */
-	rsdt->header.checksum = 0;
-	rsdt->header.checksum = table_compute_checksum((u8 *)rsdt,
-			rsdt->header.length);
-
-	/*
-	 * 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] = (u64)(u32)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((u8 *)xsdt,
-				xsdt->header.length);
-	}
-}
-
 static void acpi_create_facs(struct acpi_facs *facs)
 {
 	memset((void *)facs, 0, sizeof(struct acpi_facs));
@@ -462,8 +402,6 @@  static void acpi_create_spcr(struct acpi_spcr *spcr)
 ulong write_acpi_tables(ulong start_addr)
 {
 	struct acpi_ctx sctx, *ctx = &sctx;
-	struct acpi_rsdp *rsdp;
-	struct acpi_rsdt *rsdt;
 	struct acpi_xsdt *xsdt;
 	struct acpi_facs *facs;
 	struct acpi_table_header *dsdt;
@@ -485,9 +423,9 @@  ulong write_acpi_tables(ulong start_addr)
 	debug("ACPI: Writing ACPI tables at %lx\n", start_addr);
 
 	/* We need at least an RSDP and an RSDT Table */
-	rsdp = ctx->current;
+	ctx->rsdp = ctx->current;
 	acpi_inc_align(ctx, sizeof(struct acpi_rsdp));
-	rsdt = ctx->current;
+	ctx->rsdt = ctx->current;
 	acpi_inc_align(ctx, sizeof(struct acpi_rsdt));
 	xsdt = ctx->current;
 	acpi_inc_align(ctx, sizeof(struct acpi_xsdt));
@@ -500,8 +438,8 @@  ulong write_acpi_tables(ulong start_addr)
 	/* clear all table memory */
 	memset((void *)start, 0, ctx->current - start);
 
-	acpi_write_rsdp(rsdp, rsdt, xsdt);
-	acpi_write_rsdt(rsdt);
+	acpi_write_rsdp(ctx->rsdp, ctx->rsdt, xsdt);
+	acpi_write_rsdt(ctx->rsdt);
 	acpi_write_xsdt(xsdt);
 
 	debug("ACPI:    * FACS\n");
@@ -543,38 +481,38 @@  ulong write_acpi_tables(ulong start_addr)
 	fadt = ctx->current;
 	acpi_inc_align(ctx, sizeof(struct acpi_fadt));
 	acpi_create_fadt(fadt, facs, dsdt);
-	acpi_add_table(rsdp, fadt);
+	acpi_add_table(ctx, fadt);
 
 	debug("ACPI:    * MADT\n");
 	madt = ctx->current;
 	acpi_create_madt(madt);
 	acpi_inc_align(ctx, madt->header.length);
-	acpi_add_table(rsdp, madt);
+	acpi_add_table(ctx, madt);
 
 	debug("ACPI:    * MCFG\n");
 	mcfg = ctx->current;
 	acpi_create_mcfg(mcfg);
 	acpi_inc_align(ctx, mcfg->header.length);
-	acpi_add_table(rsdp, mcfg);
+	acpi_add_table(ctx, mcfg);
 
 	debug("ACPI:    * CSRT\n");
 	csrt = ctx->current;
 	acpi_create_csrt(csrt);
 	acpi_inc_align(ctx, csrt->header.length);
-	acpi_add_table(rsdp, csrt);
+	acpi_add_table(ctx, csrt);
 
 	debug("ACPI:    * SPCR\n");
 	spcr = ctx->current;
 	acpi_create_spcr(spcr);
 	acpi_inc_align(ctx, spcr->header.length);
-	acpi_add_table(rsdp, spcr);
+	acpi_add_table(ctx, spcr);
 
 	acpi_write_dev_tables(ctx);
 
 	addr = map_to_sysmem(ctx->current);
 	debug("current = %lx\n", addr);
 
-	acpi_rsdp_addr = (unsigned long)rsdp;
+	acpi_rsdp_addr = (unsigned long)ctx->rsdp;
 	debug("ACPI: done\n");
 
 	return addr;
diff --git a/include/acpi/acpi_table.h b/include/acpi/acpi_table.h
index 0710324e698..b86800fdfa4 100644
--- a/include/acpi/acpi_table.h
+++ b/include/acpi/acpi_table.h
@@ -555,6 +555,15 @@  void acpi_inc(struct acpi_ctx *ctx, uint amount);
  */
 void acpi_inc_align(struct acpi_ctx *ctx, uint amount);
 
+/**
+ * acpi_add_table() - Add a new table to the RSDP and XSDT
+ *
+ * @ctx: ACPI context
+ * @table: Table to add
+ * @return 0 if OK, -E2BIG if too many tables
+ */
+int acpi_add_table(struct acpi_ctx *ctx, void *table);
+
 #endif /* !__ACPI__*/
 
 #include <asm/acpi_table.h>
diff --git a/include/dm/acpi.h b/include/dm/acpi.h
index 9a0a437dd03..ee6f7a63e79 100644
--- a/include/dm/acpi.h
+++ b/include/dm/acpi.h
@@ -30,9 +30,14 @@ 
  * This contains a few useful pieces of information used when writing
  *
  * @current: Current address for writing
+ * @rsdp: Pointer to the Root System Description Pointer, typically used when
+ *	adding a new table. The RSDP holds pointers to the RSDT and XSDT.
+ * @rsdt: Pointer to the Root System Description Table
  */
 struct acpi_ctx {
 	void *current;
+	struct acpi_rsdp *rsdp;
+	struct acpi_rsdt *rsdt;
 };
 
 /**
diff --git a/lib/acpi/acpi_table.c b/lib/acpi/acpi_table.c
index 35075a608f7..b2086cbbf7a 100644
--- a/lib/acpi/acpi_table.c
+++ b/lib/acpi/acpi_table.c
@@ -8,6 +8,8 @@ 
 #include <common.h>
 #include <dm.h>
 #include <cpu.h>
+#include <mapmem.h>
+#include <tables_csum.h>
 #include <version.h>
 #include <acpi/acpi_table.h>
 #include <dm/acpi.h>
@@ -118,3 +120,62 @@  void acpi_inc_align(struct acpi_ctx *ctx, uint amount)
 	ctx->current += amount;
 	acpi_align(ctx);
 }
+
+/**
+ * Add an ACPI table to the RSDT (and XSDT) structure, recalculate length
+ * and checksum.
+ */
+int acpi_add_table(struct acpi_ctx *ctx, void *table)
+{
+	int i, entries_num;
+	struct acpi_rsdt *rsdt;
+	struct acpi_xsdt *xsdt;
+
+	/* The RSDT is mandatory while the XSDT is not */
+	rsdt = ctx->rsdt;
+
+	/* This should always be MAX_ACPI_TABLES */
+	entries_num = ARRAY_SIZE(rsdt->entry);
+
+	for (i = 0; i < entries_num; i++) {
+		if (rsdt->entry[i] == 0)
+			break;
+	}
+
+	if (i >= entries_num) {
+		debug("ACPI: Error: too many tables\n");
+		return -E2BIG;
+	}
+
+	/* Add table to the RSDT */
+	rsdt->entry[i] = map_to_sysmem(table);
+
+	/* Fix RSDT length or the kernel will assume invalid entries */
+	rsdt->header.length = sizeof(struct acpi_table_header) +
+				(sizeof(u32) * (i + 1));
+
+	/* Re-calculate checksum */
+	rsdt->header.checksum = 0;
+	rsdt->header.checksum = table_compute_checksum((u8 *)rsdt,
+						       rsdt->header.length);
+
+	/*
+	 * 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
+	 */
+	xsdt = (struct acpi_xsdt *)((u32)rsdp->xsdt_address);
+
+	/* 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((u8 *)xsdt,
+						       xsdt->header.length);
+
+	return 0;
+}
diff --git a/test/dm/acpi.c b/test/dm/acpi.c
index 17e208ee80e..4dd4a540967 100644
--- a/test/dm/acpi.c
+++ b/test/dm/acpi.c
@@ -21,10 +21,14 @@  static int testacpi_write_tables(const struct udevice *dev,
 				 struct acpi_ctx *ctx)
 {
 	struct acpi_dmar *dmar;
+	int ret;
 
 	dmar = (struct acpi_dmar *)ctx->current;
 	acpi_create_dmar(dmar, DMAR_INTR_REMAP);
 	ctx->current += sizeof(struct acpi_dmar);
+	ret = acpi_add_table(ctx, dmar);
+	if (ret)
+		return log_msg_ret("add", ret);
 
 	return 0;
 }