x86: image: Add new image type for x64_64

This is a bit odd in that we are permitted to boot images for either, even
though they are separate architectures.

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

common/bootm.c

@@ -167,7 +167,8 @@ static int bootm_find_os(cmd_tbl_t *cmdtp, int flag, int argc,
 	}
 
 	/* If we have a valid setup.bin, we will use that for entry (x86) */
-	if (images.os.arch == IH_ARCH_I386) {
+	if (images.os.arch == IH_ARCH_I386 ||
+	    images.os.arch == IH_ARCH_X86_64) {
 		ulong len;
 
 		ret = boot_get_setup(&images, IH_ARCH_I386, &images.ep, &len);

common/image-fit.c

@@ -1114,7 +1114,8 @@ int fit_image_check_arch(const void *fit, int noffset, uint8_t arch)
 
 	if (fit_image_get_arch(fit, noffset, &image_arch))
 		return 0;
-	return (arch == image_arch);
+	return (arch == image_arch) ||
+		(arch == IH_ARCH_I386 && image_arch == IH_ARCH_X86_64);
 }
 
 /**

common/image.c

@@ -85,6 +85,7 @@ static const table_entry_t uimage_arch[] = {
 	{	IH_ARCH_SANDBOX,	"sandbox",	"Sandbox",	},
 	{	IH_ARCH_ARM64,		"arm64",	"AArch64",	},
 	{	IH_ARCH_ARC,		"arc",		"ARC",		},
+	{	IH_ARCH_X86_64,		"x86_64",	"AMD x86_64",	},
 	{	-1,			"",		"",		},
 };
 

include/image.h

@@ -173,6 +173,7 @@ struct lmb;
 #define IH_ARCH_OPENRISC        21	/* OpenRISC 1000  */
 #define IH_ARCH_ARM64		22	/* ARM64	*/
 #define IH_ARCH_ARC		23	/* Synopsys DesignWare ARC */
+#define IH_ARCH_X86_64		24	/* AMD x86_64, Intel and Via */
 
 /*
  * Image Types