arch/powerpc/boot/main.c - maze/linux - Git at Google

 /*
  * Copyright (C) Paul Mackerras 1997.
  *
  * Updates for PPC64 by Todd Inglett, Dave Engebretsen & Peter Bergner.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version
  * 2 of the License, or (at your option) any later version.
  */
 #include <stdarg.h>
 #include <stddef.h>
 #include "elf.h"
 #include "page.h"
 #include "string.h"
 #include "stdio.h"
 #include "zlib.h"
 #include "ops.h"
 #include "flatdevtree.h"

 extern void flush_cache(void *, unsigned long);

 extern char _start[];
 extern char __bss_start[];
 extern char _end[];
 extern char _vmlinux_start[];
 extern char _vmlinux_end[];
 extern char _initrd_start[];
 extern char _initrd_end[];

 struct addr_range {
 	unsigned long addr;
 	unsigned long size;
 	unsigned long memsize;
 };
 static struct addr_range vmlinux;
 static struct addr_range vmlinuz;
 static struct addr_range initrd;

 static unsigned long elfoffset;
 static int is_64bit;

 /* scratch space for gunzip; 46912 is from zlib_inflate_workspacesize() */
 static char scratch[46912];
 static char elfheader[256];

 typedef void (*kernel_entry_t)(unsigned long, unsigned long, void *);

 #undef DEBUG

 #define HEAD_CRC	2
 #define EXTRA_FIELD	4
 #define ORIG_NAME	8
 #define COMMENT		0x10
 #define RESERVED	0xe0

 static void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
 {
 	z_stream s;
 	int r, i, flags;

 	/* skip header */
 	i = 10;
 	flags = src[3];
 	if (src[2] != Z_DEFLATED || (flags & RESERVED) != 0) {
 		printf("bad gzipped data\n\r");
 		exit();
 	}
 	if ((flags & EXTRA_FIELD) != 0)
 		i = 12 + src[10] + (src[11] << 8);
 	if ((flags & ORIG_NAME) != 0)
 		while (src[i++] != 0)
 			;
 	if ((flags & COMMENT) != 0)
 		while (src[i++] != 0)
 			;
 	if ((flags & HEAD_CRC) != 0)
 		i += 2;
 	if (i >= *lenp) {
 		printf("gunzip: ran out of data in header\n\r");
 		exit();
 	}

 	if (zlib_inflate_workspacesize() > sizeof(scratch)) {
 		printf("gunzip needs more mem\n");
 		exit();
 	}
 	memset(&s, 0, sizeof(s));
 	s.workspace = scratch;
 	r = zlib_inflateInit2(&s, -MAX_WBITS);
 	if (r != Z_OK) {
 		printf("inflateInit2 returned %d\n\r", r);
 		exit();
 	}
 	s.next_in = src + i;
 	s.avail_in = *lenp - i;
 	s.next_out = dst;
 	s.avail_out = dstlen;
 	r = zlib_inflate(&s, Z_FULL_FLUSH);
 	if (r != Z_OK && r != Z_STREAM_END) {
 		printf("inflate returned %d msg: %s\n\r", r, s.msg);
 		exit();
 	}
 	*lenp = s.next_out - (unsigned char *) dst;
 	zlib_inflateEnd(&s);
 }

 static int is_elf64(void *hdr)
 {
 	Elf64_Ehdr *elf64 = hdr;
 	Elf64_Phdr *elf64ph;
 	unsigned int i;

 	if (!(elf64->e_ident[EI_MAG0]  == ELFMAG0	&&
 	      elf64->e_ident[EI_MAG1]  == ELFMAG1	&&
 	      elf64->e_ident[EI_MAG2]  == ELFMAG2	&&
 	      elf64->e_ident[EI_MAG3]  == ELFMAG3	&&
 	      elf64->e_ident[EI_CLASS] == ELFCLASS64	&&
 	      elf64->e_ident[EI_DATA]  == ELFDATA2MSB	&&
 	      elf64->e_type            == ET_EXEC	&&
 	      elf64->e_machine         == EM_PPC64))
 		return 0;

 	elf64ph = (Elf64_Phdr *)((unsigned long)elf64 +
 				 (unsigned long)elf64->e_phoff);
 	for (i = 0; i < (unsigned int)elf64->e_phnum; i++, elf64ph++)
 		if (elf64ph->p_type == PT_LOAD)
 			break;
 	if (i >= (unsigned int)elf64->e_phnum)
 		return 0;

 	elfoffset = (unsigned long)elf64ph->p_offset;
 	vmlinux.size = (unsigned long)elf64ph->p_filesz + elfoffset;
 	vmlinux.memsize = (unsigned long)elf64ph->p_memsz + elfoffset;

 	is_64bit = 1;
 	return 1;
 }

 static int is_elf32(void *hdr)
 {
 	Elf32_Ehdr *elf32 = hdr;
 	Elf32_Phdr *elf32ph;
 	unsigned int i;

 	if (!(elf32->e_ident[EI_MAG0]  == ELFMAG0	&&
 	      elf32->e_ident[EI_MAG1]  == ELFMAG1	&&
 	      elf32->e_ident[EI_MAG2]  == ELFMAG2	&&
 	      elf32->e_ident[EI_MAG3]  == ELFMAG3	&&
 	      elf32->e_ident[EI_CLASS] == ELFCLASS32	&&
 	      elf32->e_ident[EI_DATA]  == ELFDATA2MSB	&&
 	      elf32->e_type            == ET_EXEC	&&
 	      elf32->e_machine         == EM_PPC))
 		return 0;

 	elf32 = (Elf32_Ehdr *)elfheader;
 	elf32ph = (Elf32_Phdr *) ((unsigned long)elf32 + elf32->e_phoff);
 	for (i = 0; i < elf32->e_phnum; i++, elf32ph++)
 		if (elf32ph->p_type == PT_LOAD)
 			break;
 	if (i >= elf32->e_phnum)
 		return 0;

 	elfoffset = elf32ph->p_offset;
 	vmlinux.size = elf32ph->p_filesz + elf32ph->p_offset;
 	vmlinux.memsize = elf32ph->p_memsz + elf32ph->p_offset;
 	return 1;
 }

 static void prep_kernel(unsigned long *a1, unsigned long *a2)
 {
 	int len;

 	vmlinuz.addr = (unsigned long)_vmlinux_start;
 	vmlinuz.size = (unsigned long)(_vmlinux_end - _vmlinux_start);

 	/* gunzip the ELF header of the kernel */
 	if (*(unsigned short *)vmlinuz.addr == 0x1f8b) {
 		len = vmlinuz.size;
 		gunzip(elfheader, sizeof(elfheader),
 				(unsigned char *)vmlinuz.addr, &len);
 	} else
 		memcpy(elfheader, (const void *)vmlinuz.addr,
 		       sizeof(elfheader));

 	if (!is_elf64(elfheader) && !is_elf32(elfheader)) {
 		printf("Error: not a valid PPC32 or PPC64 ELF file!\n\r");
 		exit();
 	}
 	if (platform_ops.image_hdr)
 		platform_ops.image_hdr(elfheader);

 	/* We need to alloc the memsize plus the file offset since gzip
 	 * will expand the header (file offset), then the kernel, then
 	 * possible rubbish we don't care about. But the kernel bss must
 	 * be claimed (it will be zero'd by the kernel itself)
 	 */
 	printf("Allocating 0x%lx bytes for kernel ...\n\r", vmlinux.memsize);
 	vmlinux.addr = (unsigned long)malloc(vmlinux.memsize);
 	if (vmlinux.addr == 0) {
 		printf("Can't allocate memory for kernel image !\n\r");
 		exit();
 	}

 	/*
 	 * Now we try to alloc memory for the initrd (and copy it there)
 	 */
 	initrd.size = (unsigned long)(_initrd_end - _initrd_start);
 	initrd.memsize = initrd.size;
 	if ( initrd.size > 0 ) {
 		printf("Allocating 0x%lx bytes for initrd ...\n\r",
 		       initrd.size);
 		initrd.addr = (unsigned long)malloc((u32)initrd.size);
 		if (initrd.addr == 0) {
 			printf("Can't allocate memory for initial "
 					"ramdisk !\n\r");
 			exit();
 		}
 		*a1 = initrd.addr;
 		*a2 = initrd.size;
 		printf("initial ramdisk moving 0x%lx <- 0x%lx "
 			"(0x%lx bytes)\n\r", initrd.addr,
 			(unsigned long)_initrd_start, initrd.size);
 		memmove((void *)initrd.addr, (void *)_initrd_start,
 			initrd.size);
 		printf("initrd head: 0x%lx\n\r",
 				*((unsigned long *)initrd.addr));
 	}

 	/* Eventually gunzip the kernel */
 	if (*(unsigned short *)vmlinuz.addr == 0x1f8b) {
 		printf("gunzipping (0x%lx <- 0x%lx:0x%0lx)...",
 		       vmlinux.addr, vmlinuz.addr, vmlinuz.addr+vmlinuz.size);
 		len = vmlinuz.size;
 		gunzip((void *)vmlinux.addr, vmlinux.memsize,
 			(unsigned char *)vmlinuz.addr, &len);
 		printf("done 0x%lx bytes\n\r", len);
 	} else {
 		memmove((void *)vmlinux.addr,(void *)vmlinuz.addr,
 			vmlinuz.size);
 	}

 	/* Skip over the ELF header */
 #ifdef DEBUG
 	printf("... skipping 0x%lx bytes of ELF header\n\r",
 			elfoffset);
 #endif
 	vmlinux.addr += elfoffset;

 	flush_cache((void *)vmlinux.addr, vmlinux.size);
 }

 void __attribute__ ((weak)) ft_init(void *dt_blob)
 {
 }

 /* A buffer that may be edited by tools operating on a zImage binary so as to
  * edit the command line passed to vmlinux (by setting /chosen/bootargs).
  * The buffer is put in it's own section so that tools may locate it easier.
  */
 static char builtin_cmdline[COMMAND_LINE_SIZE]
 	__attribute__((__section__("__builtin_cmdline")));

 static void get_cmdline(char *buf, int size)
 {
 	void *devp;
 	int len = strlen(builtin_cmdline);

 	buf[0] = '\0';

 	if (len > 0) { /* builtin_cmdline overrides dt's /chosen/bootargs */
 		len = min(len, size-1);
 		strncpy(buf, builtin_cmdline, len);
 		buf[len] = '\0';
 	}
 	else if ((devp = finddevice("/chosen")))
 		getprop(devp, "bootargs", buf, size);
 }

 static void set_cmdline(char *buf)
 {
 	void *devp;

 	if ((devp = finddevice("/chosen")))
 		setprop(devp, "bootargs", buf, strlen(buf) + 1);
 }

 /* Section where ft can be tacked on after zImage is built */
 union blobspace {
 	struct boot_param_header hdr;
 	char space[8*1024];
 } dt_blob __attribute__((__section__("__builtin_ft")));

 struct platform_ops platform_ops;
 struct dt_ops dt_ops;
 struct console_ops console_ops;

 void start(unsigned long a1, unsigned long a2, void *promptr, void *sp)
 {
 	int have_dt = 0;
 	kernel_entry_t kentry;
 	char cmdline[COMMAND_LINE_SIZE];

 	memset(__bss_start, 0, _end - __bss_start);
 	memset(&platform_ops, 0, sizeof(platform_ops));
 	memset(&dt_ops, 0, sizeof(dt_ops));
 	memset(&console_ops, 0, sizeof(console_ops));

 	/* Override the dt_ops and device tree if there was an flat dev
 	 * tree attached to the zImage.
 	 */
 	if (dt_blob.hdr.magic == OF_DT_HEADER) {
 		have_dt = 1;
 		ft_init(&dt_blob);
 	}

 	if (platform_init(promptr))
 		exit();
 	if (console_ops.open && (console_ops.open() < 0))
 		exit();
 	if (platform_ops.fixups)
 		platform_ops.fixups();

 	printf("\n\rzImage starting: loaded at 0x%p (sp: 0x%p)\n\r",
 	       _start, sp);

 	prep_kernel(&a1, &a2);

 	/* If cmdline came from zimage wrapper or if we can edit the one
 	 * in the dt, print it out and edit it, if possible.
 	 */
 	if ((strlen(builtin_cmdline) > 0) || console_ops.edit_cmdline) {
 		get_cmdline(cmdline, COMMAND_LINE_SIZE);
 		printf("\n\rLinux/PowerPC load: %s", cmdline);
 		if (console_ops.edit_cmdline)
 			console_ops.edit_cmdline(cmdline, COMMAND_LINE_SIZE);
 		printf("\n\r");
 		set_cmdline(cmdline);
 	}

 	if (console_ops.close)
 		console_ops.close();

 	kentry = (kernel_entry_t) vmlinux.addr;
 	if (have_dt)
 		kentry(dt_ops.ft_addr(), 0, NULL);
 	else
 		/* XXX initrd addr/size should be passed in properties */
 		kentry(a1, a2, promptr);

 	/* console closed so printf below may not work */
 	printf("Error: Linux kernel returned to zImage boot wrapper!\n\r");
 	exit();
 }
	/*
	* Copyright (C) Paul Mackerras 1997.
	*
	* Updates for PPC64 by Todd Inglett, Dave Engebretsen & Peter Bergner.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* as published by the Free Software Foundation; either version
	* 2 of the License, or (at your option) any later version.
	*/
	#include <stdarg.h>
	#include <stddef.h>
	#include "elf.h"
	#include "page.h"
	#include "string.h"
	#include "stdio.h"
	#include "zlib.h"
	#include "ops.h"
	#include "flatdevtree.h"

	extern void flush_cache(void *, unsigned long);

	extern char _start[];
	extern char __bss_start[];
	extern char _end[];
	extern char _vmlinux_start[];
	extern char _vmlinux_end[];
	extern char _initrd_start[];
	extern char _initrd_end[];

	struct addr_range {
	unsigned long addr;
	unsigned long size;
	unsigned long memsize;
	};
	static struct addr_range vmlinux;
	static struct addr_range vmlinuz;
	static struct addr_range initrd;

	static unsigned long elfoffset;
	static int is_64bit;

	/* scratch space for gunzip; 46912 is from zlib_inflate_workspacesize() */
	static char scratch[46912];
	static char elfheader[256];

	typedef void (kernel_entry_t)(unsigned long, unsigned long, void );

	#undef DEBUG

	#define HEAD_CRC 2
	#define EXTRA_FIELD 4
	#define ORIG_NAME 8
	#define COMMENT 0x10
	#define RESERVED 0xe0

	static void gunzip(void dst, int dstlen, unsigned char src, int *lenp)
	{
	z_stream s;
	int r, i, flags;

	/* skip header */
	i = 10;
	flags = src[3];
	if (src[2] != Z_DEFLATED \|\| (flags & RESERVED) != 0) {
	printf("bad gzipped data\n\r");
	exit();
	}
	if ((flags & EXTRA_FIELD) != 0)
	i = 12 + src[10] + (src[11] << 8);
	if ((flags & ORIG_NAME) != 0)
	while (src[i++] != 0)
	;
	if ((flags & COMMENT) != 0)
	while (src[i++] != 0)
	;
	if ((flags & HEAD_CRC) != 0)
	i += 2;
	if (i >= *lenp) {
	printf("gunzip: ran out of data in header\n\r");
	exit();
	}

	if (zlib_inflate_workspacesize() > sizeof(scratch)) {
	printf("gunzip needs more mem\n");
	exit();
	}
	memset(&s, 0, sizeof(s));
	s.workspace = scratch;
	r = zlib_inflateInit2(&s, -MAX_WBITS);
	if (r != Z_OK) {
	printf("inflateInit2 returned %d\n\r", r);
	exit();
	}
	s.next_in = src + i;
	s.avail_in = *lenp - i;
	s.next_out = dst;
	s.avail_out = dstlen;
	r = zlib_inflate(&s, Z_FULL_FLUSH);
	if (r != Z_OK && r != Z_STREAM_END) {
	printf("inflate returned %d msg: %s\n\r", r, s.msg);
	exit();
	}
	lenp = s.next_out - (unsigned char ) dst;
	zlib_inflateEnd(&s);
	}

	static int is_elf64(void *hdr)
	{
	Elf64_Ehdr *elf64 = hdr;
	Elf64_Phdr *elf64ph;
	unsigned int i;

	if (!(elf64->e_ident[EI_MAG0] == ELFMAG0 &&
	elf64->e_ident[EI_MAG1] == ELFMAG1 &&
	elf64->e_ident[EI_MAG2] == ELFMAG2 &&
	elf64->e_ident[EI_MAG3] == ELFMAG3 &&
	elf64->e_ident[EI_CLASS] == ELFCLASS64 &&
	elf64->e_ident[EI_DATA] == ELFDATA2MSB &&
	elf64->e_type == ET_EXEC &&
	elf64->e_machine == EM_PPC64))
	return 0;

	elf64ph = (Elf64_Phdr *)((unsigned long)elf64 +
	(unsigned long)elf64->e_phoff);
	for (i = 0; i < (unsigned int)elf64->e_phnum; i++, elf64ph++)
	if (elf64ph->p_type == PT_LOAD)
	break;
	if (i >= (unsigned int)elf64->e_phnum)
	return 0;

	elfoffset = (unsigned long)elf64ph->p_offset;
	vmlinux.size = (unsigned long)elf64ph->p_filesz + elfoffset;
	vmlinux.memsize = (unsigned long)elf64ph->p_memsz + elfoffset;

	is_64bit = 1;
	return 1;
	}

	static int is_elf32(void *hdr)
	{
	Elf32_Ehdr *elf32 = hdr;
	Elf32_Phdr *elf32ph;
	unsigned int i;

	if (!(elf32->e_ident[EI_MAG0] == ELFMAG0 &&
	elf32->e_ident[EI_MAG1] == ELFMAG1 &&
	elf32->e_ident[EI_MAG2] == ELFMAG2 &&
	elf32->e_ident[EI_MAG3] == ELFMAG3 &&
	elf32->e_ident[EI_CLASS] == ELFCLASS32 &&
	elf32->e_ident[EI_DATA] == ELFDATA2MSB &&
	elf32->e_type == ET_EXEC &&
	elf32->e_machine == EM_PPC))
	return 0;

	elf32 = (Elf32_Ehdr *)elfheader;
	elf32ph = (Elf32_Phdr *) ((unsigned long)elf32 + elf32->e_phoff);
	for (i = 0; i < elf32->e_phnum; i++, elf32ph++)
	if (elf32ph->p_type == PT_LOAD)
	break;
	if (i >= elf32->e_phnum)
	return 0;

	elfoffset = elf32ph->p_offset;
	vmlinux.size = elf32ph->p_filesz + elf32ph->p_offset;
	vmlinux.memsize = elf32ph->p_memsz + elf32ph->p_offset;
	return 1;
	}

	static void prep_kernel(unsigned long a1, unsigned long a2)
	{
	int len;

	vmlinuz.addr = (unsigned long)_vmlinux_start;
	vmlinuz.size = (unsigned long)(_vmlinux_end - _vmlinux_start);

	/* gunzip the ELF header of the kernel */
	if ((unsigned short )vmlinuz.addr == 0x1f8b) {
	len = vmlinuz.size;
	gunzip(elfheader, sizeof(elfheader),
	(unsigned char *)vmlinuz.addr, &len);
	} else
	memcpy(elfheader, (const void *)vmlinuz.addr,
	sizeof(elfheader));

	if (!is_elf64(elfheader) && !is_elf32(elfheader)) {
	printf("Error: not a valid PPC32 or PPC64 ELF file!\n\r");
	exit();
	}
	if (platform_ops.image_hdr)
	platform_ops.image_hdr(elfheader);

	/* We need to alloc the memsize plus the file offset since gzip
	* will expand the header (file offset), then the kernel, then
	* possible rubbish we don't care about. But the kernel bss must
	* be claimed (it will be zero'd by the kernel itself)
	*/
	printf("Allocating 0x%lx bytes for kernel ...\n\r", vmlinux.memsize);
	vmlinux.addr = (unsigned long)malloc(vmlinux.memsize);
	if (vmlinux.addr == 0) {
	printf("Can't allocate memory for kernel image !\n\r");
	exit();
	}

	/*
	* Now we try to alloc memory for the initrd (and copy it there)
	*/
	initrd.size = (unsigned long)(_initrd_end - _initrd_start);
	initrd.memsize = initrd.size;
	if ( initrd.size > 0 ) {
	printf("Allocating 0x%lx bytes for initrd ...\n\r",
	initrd.size);
	initrd.addr = (unsigned long)malloc((u32)initrd.size);
	if (initrd.addr == 0) {
	printf("Can't allocate memory for initial "
	"ramdisk !\n\r");
	exit();
	}
	*a1 = initrd.addr;
	*a2 = initrd.size;
	printf("initial ramdisk moving 0x%lx <- 0x%lx "
	"(0x%lx bytes)\n\r", initrd.addr,
	(unsigned long)_initrd_start, initrd.size);
	memmove((void )initrd.addr, (void )_initrd_start,
	initrd.size);
	printf("initrd head: 0x%lx\n\r",
	((unsigned long )initrd.addr));
	}

	/* Eventually gunzip the kernel */
	if ((unsigned short )vmlinuz.addr == 0x1f8b) {
	printf("gunzipping (0x%lx <- 0x%lx:0x%0lx)...",
	vmlinux.addr, vmlinuz.addr, vmlinuz.addr+vmlinuz.size);
	len = vmlinuz.size;
	gunzip((void *)vmlinux.addr, vmlinux.memsize,
	(unsigned char *)vmlinuz.addr, &len);
	printf("done 0x%lx bytes\n\r", len);
	} else {
	memmove((void )vmlinux.addr,(void )vmlinuz.addr,
	vmlinuz.size);
	}

	/* Skip over the ELF header */
	#ifdef DEBUG
	printf("... skipping 0x%lx bytes of ELF header\n\r",
	elfoffset);
	#endif
	vmlinux.addr += elfoffset;

	flush_cache((void *)vmlinux.addr, vmlinux.size);
	}

	void __attribute__ ((weak)) ft_init(void *dt_blob)
	{
	}

	/* A buffer that may be edited by tools operating on a zImage binary so as to
	* edit the command line passed to vmlinux (by setting /chosen/bootargs).
	* The buffer is put in it's own section so that tools may locate it easier.
	*/
	static char builtin_cmdline[COMMAND_LINE_SIZE]
	__attribute__((__section__("__builtin_cmdline")));

	static void get_cmdline(char *buf, int size)
	{
	void *devp;
	int len = strlen(builtin_cmdline);

	buf[0] = '\0';

	if (len > 0) { /* builtin_cmdline overrides dt's /chosen/bootargs */
	len = min(len, size-1);
	strncpy(buf, builtin_cmdline, len);
	buf[len] = '\0';
	}
	else if ((devp = finddevice("/chosen")))
	getprop(devp, "bootargs", buf, size);
	}

	static void set_cmdline(char *buf)
	{
	void *devp;

	if ((devp = finddevice("/chosen")))
	setprop(devp, "bootargs", buf, strlen(buf) + 1);
	}

	/* Section where ft can be tacked on after zImage is built */
	union blobspace {
	struct boot_param_header hdr;
	char space[8*1024];
	} dt_blob __attribute__((__section__("__builtin_ft")));

	struct platform_ops platform_ops;
	struct dt_ops dt_ops;
	struct console_ops console_ops;

	void start(unsigned long a1, unsigned long a2, void promptr, void sp)
	{
	int have_dt = 0;
	kernel_entry_t kentry;
	char cmdline[COMMAND_LINE_SIZE];

	memset(__bss_start, 0, _end - __bss_start);
	memset(&platform_ops, 0, sizeof(platform_ops));
	memset(&dt_ops, 0, sizeof(dt_ops));
	memset(&console_ops, 0, sizeof(console_ops));

	/* Override the dt_ops and device tree if there was an flat dev
	* tree attached to the zImage.
	*/
	if (dt_blob.hdr.magic == OF_DT_HEADER) {
	have_dt = 1;
	ft_init(&dt_blob);
	}

	if (platform_init(promptr))
	exit();
	if (console_ops.open && (console_ops.open() < 0))
	exit();
	if (platform_ops.fixups)
	platform_ops.fixups();

	printf("\n\rzImage starting: loaded at 0x%p (sp: 0x%p)\n\r",
	_start, sp);

	prep_kernel(&a1, &a2);

	/* If cmdline came from zimage wrapper or if we can edit the one
	* in the dt, print it out and edit it, if possible.
	*/
	if ((strlen(builtin_cmdline) > 0) \|\| console_ops.edit_cmdline) {
	get_cmdline(cmdline, COMMAND_LINE_SIZE);
	printf("\n\rLinux/PowerPC load: %s", cmdline);
	if (console_ops.edit_cmdline)
	console_ops.edit_cmdline(cmdline, COMMAND_LINE_SIZE);
	printf("\n\r");
	set_cmdline(cmdline);
	}

	if (console_ops.close)
	console_ops.close();

	kentry = (kernel_entry_t) vmlinux.addr;
	if (have_dt)
	kentry(dt_ops.ft_addr(), 0, NULL);
	else
	/* XXX initrd addr/size should be passed in properties */
	kentry(a1, a2, promptr);

	/* console closed so printf below may not work */
	printf("Error: Linux kernel returned to zImage boot wrapper!\n\r");
	exit();
	}