From 88c6aef3299b7697de9a97ece63bc1b19b7c35c1 Mon Sep 17 00:00:00 2001
From: nwhitehorn <nwhitehorn@FreeBSD.org>
Date: Mon, 12 Jul 2010 00:49:22 +0000
Subject: Provide support in loader for booting 64-bit PowerPC kernels. Like
 amd64, 64-bit PowerPC kernels are loaded by a 32-bit loader, since nearly all
 powerpc64 firmwares execute in 32-bit mode.

---
 sys/boot/ofw/libofw/Makefile            |   3 +-
 sys/boot/ofw/libofw/libofw.h            |   3 +
 sys/boot/ofw/libofw/ppc64_elf_freebsd.c | 101 ++++++++++++++++++++++++++++++++
 3 files changed, 106 insertions(+), 1 deletion(-)
 create mode 100644 sys/boot/ofw/libofw/ppc64_elf_freebsd.c

(limited to 'sys/boot/ofw/libofw')

diff --git a/sys/boot/ofw/libofw/Makefile b/sys/boot/ofw/libofw/Makefile
index 8a56a77..5ea0de9 100644
--- a/sys/boot/ofw/libofw/Makefile
+++ b/sys/boot/ofw/libofw/Makefile
@@ -13,8 +13,9 @@ CFLAGS+=	-I${.CURDIR}/../../../../lib/libstand/
 CFLAGS+=	-I${.CURDIR}/../../common -I${.CURDIR}/../../.. -I.
 
 CFLAGS+=	-ffreestanding
-.if ${MACHINE_ARCH} == "powerpc"
+.if ${MACHINE_ARCH} == "powerpc" || ${MACHINE_ARCH} == "powerpc64"
 CFLAGS+=	-msoft-float
+SRCS+=		ppc64_elf_freebsd.c
 .endif
 
 .ifdef(BOOT_DISK_DEBUG)
diff --git a/sys/boot/ofw/libofw/libofw.h b/sys/boot/ofw/libofw/libofw.h
index 748233e..5f6d7ad 100644
--- a/sys/boot/ofw/libofw/libofw.h
+++ b/sys/boot/ofw/libofw/libofw.h
@@ -62,6 +62,9 @@ int	ofw_elf_loadfile(char *, vm_offset_t, struct preloaded_file **);
 int	ofw_elf_exec(struct preloaded_file *);
 
 extern struct file_format	ofw_elf;
+#ifdef __powerpc__
+extern struct file_format	ofw_elf64;
+#endif
 
 extern void	reboot(void);
 
diff --git a/sys/boot/ofw/libofw/ppc64_elf_freebsd.c b/sys/boot/ofw/libofw/ppc64_elf_freebsd.c
new file mode 100644
index 0000000..84ea406
--- /dev/null
+++ b/sys/boot/ofw/libofw/ppc64_elf_freebsd.c
@@ -0,0 +1,101 @@
+/*-
+ * Copyright (c) 2001 Benno Rice <benno@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#define __ELF_WORD_SIZE 64
+
+#include <sys/param.h>
+#include <sys/linker.h>
+
+#include <machine/metadata.h>
+#include <machine/elf.h>
+
+#include <stand.h>
+
+#include "bootstrap.h"
+#include "libofw.h"
+#include "openfirm.h"
+
+extern char		end[];
+extern vm_offset_t	reloc;	/* From <arch>/conf.c */
+
+int
+ppc64_ofw_elf_loadfile(char *filename, u_int64_t dest,
+    struct preloaded_file **result)
+{
+	int	r;
+
+	r = __elfN(loadfile)(filename, dest, result);
+	if (r != 0)
+		return (r);
+
+	/*
+	 * No need to sync the icache for modules: this will
+	 * be done by the kernel after relocation.
+	 */
+	if (!strcmp((*result)->f_type, "elf kernel"))
+		__syncicache((void *) (*result)->f_addr, (*result)->f_size);
+	return (0);
+}
+
+int
+ppc64_ofw_elf_exec(struct preloaded_file *fp)
+{
+	struct file_metadata	*fmp;
+	vm_offset_t		mdp;
+	Elf_Ehdr		*e;
+	int			error;
+	intptr_t		entry;
+
+	if ((fmp = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL) {
+		return(EFTYPE);
+	}
+	e = (Elf_Ehdr *)&fmp->md_data;
+	
+	/* Handle function descriptor */
+	entry = *(uint64_t *)e->e_entry;
+
+	if ((error = md_load64(fp->f_args, &mdp)) != 0)
+		return (error);
+
+	printf("Kernel entry at 0x%lx ...\n", entry);
+
+	dev_cleanup();
+	ofw_release_heap();
+
+	OF_chain((void *)reloc, end - (char *)reloc, (void *)entry,
+	    (void *)mdp, sizeof(mdp));
+
+	panic("exec returned");
+}
+
+struct file_format	ofw_elf64 =
+{
+	ppc64_ofw_elf_loadfile,
+	ppc64_ofw_elf_exec
+};
-- 
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