commit a528633fda88a435c59f35f2eee1665dedaf8cf4
author Jacob Pan <jacob.jun.pan@intel.com> Tue Mar 10 04:09:30 2009 -0700
committer Patrick Tjin <pattjin@google.com> Mon Jul 21 20:22:38 2014 -0700
tree 41439d4dc333c71500e43ef9b9e5e3f93f04309d
parent 0d20f9c744eed5da0a1dc9ea80ab3d345a6f84ed

Add hardware subarchitecture ID for Moorestown in setup header

bootparam.h

diff --git a/bootparam.h b/bootparam.h
index bd50669..42583ca 100644
--- a/bootparam.h
+++ b/bootparam.h
@@ -271,4 +271,8 @@
 	struct edd_info eddbuf[EDDMAXNR];		/* 0xd00 */
 	__u8  _pad9[276];				/* 0xeec */
 } __attribute__((packed));
+#define X86_SUBARCH_PC			0
+#define X86_SUBARCH_LGUEST 		1
+#define X86_SUBARCH_XEN			2
+#define X86_SUBARCH_MRST		3
 

bootstub.c

diff --git a/bootstub.c b/bootstub.c
index 2398af9..9bbf069 100644
--- a/bootstub.c
+++ b/bootstub.c
@@ -95,6 +95,7 @@
 	bp->hdr.type_of_loader = 0xff; //bootstub is unknown bootloader for kernel :)
 	bp->hdr.ramdisk_size = *(u32 *)INITRD_SIZE_OFFSET;
 	bp->hdr.ramdisk_image = (bp->alt_mem_k*1024 - bp->hdr.ramdisk_size) & 0xFFFFF000;
+	bp->hdr.hardware_subarch = X86_SUBARCH_MRST;
 	memcpy((u8*)bp->hdr.ramdisk_image, (u8 *)BZIMAGE_OFFSET + *(u32 *)BZIMAGE_SIZE_OFFSET, bp->hdr.ramdisk_size);
 }