lib/coreboot_table: add architecture hooks for adding tables

Add a architecture specific function, arch_write_tables(), that
allows an architecture to add its required tables for booting.
This callback helps write_tables() to be de-duplicated.

Change-Id: I805c2f166b1e75942ad28b6e7e1982d64d2d5498
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/14435
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/arch/arm/tables.c

@@ -24,6 +24,10 @@
 #include <cbmem.h>
 #include <lib.h>
 
+void arch_write_tables(uintptr_t coreboot_table)
+{
+}
+
 void bootmem_arch_add_ranges(void)
 {
 }

src/arch/arm64/tables.c

@@ -24,6 +24,10 @@
 #include <cbmem.h>
 #include <lib.h>
 
+void arch_write_tables(uintptr_t coreboot_table)
+{
+}
+
 void bootmem_arch_add_ranges(void)
 {
 }

src/arch/mips/tables.c

@@ -25,6 +25,10 @@
 #include <cbmem.h>
 #include <lib.h>
 
+void arch_write_tables(uintptr_t coreboot_table)
+{
+}
+
 void bootmem_arch_add_ranges(void)
 {
 }

src/arch/power8/tables.c

@@ -24,6 +24,10 @@
 #include <cbmem.h>
 #include <lib.h>
 
+void arch_write_tables(uintptr_t coreboot_table)
+{
+}
+
 void bootmem_arch_add_ranges(void)
 {
 }

src/arch/riscv/tables.c

@@ -24,6 +24,10 @@
 #include <cbmem.h>
 #include <lib.h>
 
+void arch_write_tables(uintptr_t coreboot_table)
+{
+}
+
 void bootmem_arch_add_ranges(void)
 {
 }

src/arch/x86/tables.c

@@ -181,29 +181,9 @@ static unsigned long write_smbios_table(unsigned long rom_table_end)
 	return rom_table_end;
 }
 
-void bootmem_arch_add_ranges(void)
+void arch_write_tables(uintptr_t coreboot_table)
 {
-}
+	unsigned long rom_table_end = 0xf0000;
-
-void write_tables(void)
-{
-	unsigned long low_table_start, low_table_end;
-	unsigned long rom_table_end;
-
-	/* Even if high tables are configured, some tables are copied both to
-	 * the low and the high area, so payloads and OSes don't need to know
-	 * about the high tables.
-	 */
-	unsigned long high_table_pointer;
-
-	rom_table_end =   0xf0000;
-
-	/* Start low addr at 0x500, so we don't run into conflicts with the BDA
-	 * in case our data structures grow beyond 0x400. Only GDT
-	 * and the coreboot table use low_tables.
-	 */
-	low_table_start = 0;
-	low_table_end = 0x500;
 
 	/* This table must be between 0x0f0000 and 0x100000 */
 	if (IS_ENABLED(CONFIG_GENERATE_PIRQ_TABLE))
@@ -218,6 +198,28 @@ void write_tables(void)
 
 	if (IS_ENABLED(CONFIG_GENERATE_SMBIOS_TABLES))
 		rom_table_end = write_smbios_table(rom_table_end);
+}
+
+void bootmem_arch_add_ranges(void)
+{
+}
+
+void write_tables(void)
+{
+	unsigned long low_table_start, low_table_end;
+
+	/* Even if high tables are configured, some tables are copied both to
+	 * the low and the high area, so payloads and OSes don't need to know
+	 * about the high tables.
+	 */
+	unsigned long high_table_pointer;
+
+	/* Start low addr at 0x500, so we don't run into conflicts with the BDA
+	 * in case our data structures grow beyond 0x400. Only GDT
+	 * and the coreboot table use low_tables.
+	 */
+	low_table_start = 0;
+	low_table_end = 0x500;
 
 	post_code(0x9e);
 

src/include/boot/tables.h

@@ -3,6 +3,18 @@
 
 #include <boot/coreboot_tables.h>
 
+/*
+ * Write architecture specific tables as well as the common
+ * coreboot table.
+ */
 void write_tables(void);
 
+/*
+ * Allow per-architecture table writes called from write_tables(). The
+ * coreboot_table parameter provides a reference to where the coreboot
+ * table will be written. The parameter is to allow architectures to
+ * provide a forwarding table to real coreboot table.
+ */
+void arch_write_tables(uintptr_t coreboot_table);
+
 #endif /* BOOT_TABLES_H */

src/lib/coreboot_table.c

@@ -19,6 +19,7 @@
 #include <console/uart.h>
 #include <ip_checksum.h>
 #include <boot/coreboot_tables.h>
+#include <boot/tables.h>
 #include <boot_device.h>
 #include <string.h>
 #include <version.h>
@@ -464,6 +465,8 @@ unsigned long write_coreboot_table(
 {
 	struct lb_header *head;
 
+	arch_write_tables(rom_table_end);
+
 	if (low_table_start || low_table_end) {
 		printk(BIOS_DEBUG, "Writing table forward entry at 0x%08lx\n",
 				low_table_end);