x86: Enable generic board support

This enables generic board support so that x86 boards can define
CONFIG_SYS_GENERIC_BOARD.

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

arch/x86/config.mk

@@ -36,6 +36,9 @@ PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_X86)
 PLATFORM_CPPFLAGS += -fno-dwarf2-cfi-asm
 PLATFORM_CPPFLAGS += -DREALMODE_BASE=0x7c0
 
+# Support generic board on x86
+__HAVE_ARCH_GENERIC_BOARD := y
+
 PLATFORM_RELFLAGS += -ffunction-sections -fvisibility=hidden
 
 PLATFORM_LDFLAGS += --emit-relocs -Bsymbolic -Bsymbolic-functions

arch/x86/include/asm/u-boot.h

@@ -39,6 +39,13 @@
 #include <config.h>
 #include <compiler.h>
 
+#ifdef CONFIG_SYS_GENERIC_BOARD
+/* Use the generic board which requires a unified bd_info */
+#include <asm-generic/u-boot.h>
+#else
+
+#ifndef __ASSEMBLY__
+
 typedef struct bd_info {
 	unsigned long	bi_memstart;	/* start of DRAM memory */
 	phys_size_t	bi_memsize;	/* size	 of DRAM memory in bytes */
@@ -60,6 +67,10 @@ typedef struct bd_info {
 	}bi_dram[CONFIG_NR_DRAM_BANKS];
 } bd_t;
 
+#endif /* __ASSEMBLY__ */
+
+#endif /* !CONFIG_SYS_GENERIC_BOARD */
+
 /* For image.h:image_check_target_arch() */
 #define IH_ARCH_DEFAULT IH_ARCH_I386
 

arch/x86/lib/Makefile

@@ -25,7 +25,10 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(ARCH).o
 
+ifeq ($(CONFIG_SYS_GENERIC_BOARD),)
 COBJS-y	+= board.o
+endif
+
 COBJS-y	+= bootm.o
 COBJS-y	+= cmd_boot.o
 COBJS-y	+= gcc.o

common/board_r.c

@@ -507,11 +507,13 @@ static int show_model_r(void)
 #endif
 
 /* enable exceptions */
+#ifdef CONFIG_ARM
 static int initr_enable_interrupts(void)
 {
 	enable_interrupts();
 	return 0;
 }
+#endif
 
 #ifdef CONFIG_CMD_NET
 static int initr_ethaddr(void)