From ad68ab89e2c36e378d03ab777464dcc8a24a43a0 Mon Sep 17 00:00:00 2001
From: Thomas Moestl <tmm@FreeBSD.org>
Date: Mon, 1 Apr 2002 23:28:35 +0000
Subject: [PATCH] Add support for booting from CD-ROM. Make it possible to
 enable UFS support using make arguments.

---
 sys/boot/sparc64/loader/Makefile |  8 ++++++++
 sys/boot/sparc64/loader/main.c   | 19 +++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/sys/boot/sparc64/loader/Makefile b/sys/boot/sparc64/loader/Makefile
index 64e686b52e48..0fda8d4484de 100644
--- a/sys/boot/sparc64/loader/Makefile
+++ b/sys/boot/sparc64/loader/Makefile
@@ -7,6 +7,8 @@ NEWVERSWHAT=	"bootstrap loader" sparc64
 CFLAGS=		-mno-app-regs 
 
 LOADER_DISK_SUPPORT?=	no
+LOADER_UFS_SUPPORT?=	no
+LOADER_CD9660_SUPPORT?=	no
 LOADER_NET_SUPPORT?=	yes
 LOADER_NFS_SUPPORT?=	yes
 LOADER_TFTP_SUPPORT?=	yes
@@ -14,6 +16,12 @@ LOADER_TFTP_SUPPORT?=	yes
 .if ${LOADER_DISK_SUPPORT} == "yes"
 CFLAGS+=	-DLOADER_DISK_SUPPORT
 .endif
+.if ${LOADER_UFS_SUPPORT} == "yes"
+CFLAGS+=	-DLOADER_UFS_SUPPORT
+.endif
+.if ${LOADER_CD9660_SUPPORT} == "yes"
+CFLAGS+=	-DLOADER_CD9660_SUPPORT
+.endif
 .if ${LOADER_NET_SUPPORT} == "yes"
 CFLAGS+=	-DLOADER_NET_SUPPORT
 .endif
diff --git a/sys/boot/sparc64/loader/main.c b/sys/boot/sparc64/loader/main.c
index 406de397028a..b85286b3a74f 100644
--- a/sys/boot/sparc64/loader/main.c
+++ b/sys/boot/sparc64/loader/main.c
@@ -105,6 +105,9 @@ struct fs_ops *file_system[] = {
 #ifdef LOADER_UFS_SUPPORT
 	&ufs_fsops,
 #endif
+#ifdef LOADER_CD9660_SUPPORT
+	&cd9660_fsops,
+#endif
 #ifdef LOADER_NET_SUPPORT
 	&nfs_fsops,
 #endif
@@ -388,6 +391,22 @@ main(int (*openfirm)(void *))
 	switch (bootdev.d_type) {
 	case DEVT_DISK:
 		bootdev.d_dev = &ofwdisk;
+		/*
+		 * Sun compatible bootable CD-ROMs have a disk label placed
+		 * before the cd9660 data, with the actual file system being
+		 * in the first partition, while the other partitions contain
+		 * pseudo disk labels with embedded boot blocks for different
+		 * architectures, which may be followed by UFS file systems.
+		 * The firmware will set the boot path to the partition it
+		 * boots from ('f' in the sun4u case), but we want the kernel
+		 * to be loaded from the cd9660 fs ('a'), so the boot path
+		 * needs to be altered.
+		 */
+		if (strstr(bootpath, "cdrom") != NULL &&
+		    bootpath[strlen(bootpath) - 2] == ':') {
+			bootpath[strlen(bootpath) - 1] = 'a';
+			printf("Boot path set to %s\n", bootpath);
+		}
 		strncpy(bootdev.d_kind.ofwdisk.path, bootpath, 64);
 		ofw_parseofwdev(&bootdev, bootpath);
 		break;