x86: Make table address selectable

Some firmwares might have another window for generated tables.

So, introduce two configuration options to select start address and
maximum length for the generated tables.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/x86/Kconfig

@@ -542,6 +542,19 @@ config VGA_BIOS_ADDR
 	  address of 0xfff90000 indicates that the image will be put at offset
 	  0x90000 from the beginning of a 1MB flash device.
 
+config ROM_TABLE_ADDR
+	hex
+	default 0xf0000
+	help
+	  All x86 tables happen to like the address range from 0x0f0000
+	  to 0x100000. We use 0xf0000 as the starting address to store
+	  those tables, including PIRQ routing table, Multi-Processor
+	  table and ACPI table.
+
+config ROM_TABLE_SIZE
+	hex
+	default 0x10000
+
 menu "System tables"
 	depends on !EFI && !SYS_COREBOOT
 

arch/x86/include/asm/tables.h

@@ -9,13 +9,8 @@
 
 #include <tables_csum.h>
 
-/*
- * All x86 tables happen to like the address range from 0xf0000 to 0x100000.
- * We use 0xf0000 as the starting address to store those tables, including
- * PIRQ routing table, Multi-Processor table and ACPI table.
- */
-#define ROM_TABLE_ADDR	0xf0000
-#define ROM_TABLE_END	0xfffff
+#define ROM_TABLE_ADDR	CONFIG_ROM_TABLE_ADDR
+#define ROM_TABLE_END	(CONFIG_ROM_TABLE_ADDR + CONFIG_ROM_TABLE_SIZE - 1)
 
 #define ROM_TABLE_ALIGN	1024