1 files changed, 0 insertions, 561 deletions

diff --git a/gpxe/src/arch/i386/image/bzimage.c b/gpxe/src/arch/i386/image/bzimage.c
deleted file mode 100644
index 19450990..00000000
--- a/gpxe/src/arch/i386/image/bzimage.c
+++ /dev/null
@@ -1,561 +0,0 @@
-/*
- * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
- *
- * 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 any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER );
-
-/**
- * @file
- *
- * Linux bzImage image format
- *
- */
-
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <assert.h>
-#include <realmode.h>
-#include <bzimage.h>
-#include <gpxe/uaccess.h>
-#include <gpxe/image.h>
-#include <gpxe/segment.h>
-#include <gpxe/init.h>
-#include <gpxe/cpio.h>
-#include <gpxe/features.h>
-
-FEATURE ( FEATURE_IMAGE, "bzImage", DHCP_EB_FEATURE_BZIMAGE, 1 );
-
-struct image_type bzimage_image_type __image_type ( PROBE_NORMAL );
-
-/**
- * bzImage context
- */
-struct bzimage_context {
-	/** Boot protocol version */
-	unsigned int version;
-	/** Real-mode kernel portion load segment address */
-	unsigned int rm_kernel_seg;
-	/** Real-mode kernel portion load address */
-	userptr_t rm_kernel;
-	/** Real-mode kernel portion file size */
-	size_t rm_filesz;
-	/** Real-mode heap top (offset from rm_kernel) */
-	size_t rm_heap;
-	/** Command line (offset from rm_kernel) */
-	size_t rm_cmdline;
-	/** Command line maximum length */
-	size_t cmdline_size;
-	/** Real-mode kernel portion total memory size */
-	size_t rm_memsz;
-	/** Non-real-mode kernel portion load address */
-	userptr_t pm_kernel;
-	/** Non-real-mode kernel portion file and memory size */
-	size_t pm_sz;
-	/** Video mode */
-	unsigned int vid_mode;
-	/** Memory limit */
-	uint64_t mem_limit;
-	/** Initrd address */
-	physaddr_t ramdisk_image;
-	/** Initrd size */
-	physaddr_t ramdisk_size;
-
-	/** Command line magic block */
-	struct bzimage_cmdline cmdline_magic;
-	/** bzImage header */
-	struct bzimage_header bzhdr;
-};
-
-/**
- * Parse bzImage header
- *
- * @v image		bzImage file
- * @v bzimg		bzImage context
- * @v src		bzImage to parse
- * @ret rc		Return status code
- */
-static int bzimage_parse_header ( struct image *image,
-				  struct bzimage_context *bzimg,
-				  userptr_t src ) {
-	unsigned int syssize;
-	int is_bzimage;
-
-	/* Sanity check */
-	if ( image->len < ( BZI_HDR_OFFSET + sizeof ( bzimg->bzhdr ) ) ) {
-		DBGC ( image, "bzImage %p too short for kernel header\n",
-		       image );
-		return -ENOEXEC;
-	}
-
-	/* Read in header structures */
-	memset ( bzimg, 0, sizeof ( *bzimg ) );
-	copy_from_user ( &bzimg->cmdline_magic, src, BZI_CMDLINE_OFFSET,
-			 sizeof ( bzimg->cmdline_magic ) );
-	copy_from_user ( &bzimg->bzhdr, src, BZI_HDR_OFFSET,
-			 sizeof ( bzimg->bzhdr ) );
-
-	/* Calculate size of real-mode portion */
-	bzimg->rm_filesz =
-		( ( bzimg->bzhdr.setup_sects ? bzimg->bzhdr.setup_sects : 4 ) + 1 ) << 9;
-	if ( bzimg->rm_filesz > image->len ) {
-		DBGC ( image, "bzImage %p too short for %zd byte of setup\n",
-		       image, bzimg->rm_filesz );
-		return -ENOEXEC;
-	}
-	bzimg->rm_memsz = BZI_ASSUMED_RM_SIZE;
-
-	/* Calculate size of protected-mode portion */
-	bzimg->pm_sz = ( image->len - bzimg->rm_filesz );
-	syssize = ( ( bzimg->pm_sz + 15 ) / 16 );
-
-	/* Check for signatures and determine version */
-	if ( bzimg->bzhdr.boot_flag != BZI_BOOT_FLAG ) {
-		DBGC ( image, "bzImage %p missing 55AA signature\n", image );
-		return -ENOEXEC;
-	}
-	if ( bzimg->bzhdr.header == BZI_SIGNATURE ) {
-		/* 2.00+ */
-		bzimg->version = bzimg->bzhdr.version;
-	} else {
-		/* Pre-2.00.  Check that the syssize field is correct,
-		 * as a guard against accepting arbitrary binary data,
-		 * since the 55AA check is pretty lax.  Note that the
-		 * syssize field is unreliable for protocols between
-		 * 2.00 and 2.03 inclusive, so we should not always
-		 * check this field.
-		 */
-		bzimg->version = 0x0100;
-		if ( bzimg->bzhdr.syssize != syssize ) {
-			DBGC ( image, "bzImage %p bad syssize %x (expected "
-			       "%x)\n", image, bzimg->bzhdr.syssize, syssize );
-			return -ENOEXEC;
-		}
-	}
-
-	/* Determine image type */
-	is_bzimage = ( ( bzimg->version >= 0x0200 ) ?
-		       ( bzimg->bzhdr.loadflags & BZI_LOAD_HIGH ) : 0 );
-
-	/* Calculate load address of real-mode portion */
-	bzimg->rm_kernel_seg = ( is_bzimage ? 0x1000 : 0x9000 );
-	bzimg->rm_kernel = real_to_user ( bzimg->rm_kernel_seg, 0 );
-
-	/* Allow space for the stack and heap */
-	bzimg->rm_memsz += BZI_STACK_SIZE;
-	bzimg->rm_heap = bzimg->rm_memsz;
-
-	/* Allow space for the command line */
-	bzimg->rm_cmdline = bzimg->rm_memsz;
-	bzimg->rm_memsz += BZI_CMDLINE_SIZE;
-
-	/* Calculate load address of protected-mode portion */
-	bzimg->pm_kernel = phys_to_user ( is_bzimage ? BZI_LOAD_HIGH_ADDR
-					: BZI_LOAD_LOW_ADDR );
-
-	/* Extract video mode */
-	bzimg->vid_mode = bzimg->bzhdr.vid_mode;
-
-	/* Extract memory limit */
-	bzimg->mem_limit = ( ( bzimg->version >= 0x0203 ) ?
-			     bzimg->bzhdr.initrd_addr_max : BZI_INITRD_MAX );
-
-	/* Extract command line size */
-	bzimg->cmdline_size = ( ( bzimg->version >= 0x0206 ) ?
-				bzimg->bzhdr.cmdline_size : BZI_CMDLINE_SIZE );
-
-	DBGC ( image, "bzImage %p version %04x RM %#lx+%#zx PM %#lx+%#zx "
-	       "cmdlen %zd\n", image, bzimg->version,
-	       user_to_phys ( bzimg->rm_kernel, 0 ), bzimg->rm_filesz,
-	       user_to_phys ( bzimg->pm_kernel, 0 ), bzimg->pm_sz,
-	       bzimg->cmdline_size );
-
-	return 0;
-}
-
-/**
- * Update bzImage header in loaded kernel
- *
- * @v image		bzImage file
- * @v bzimg		bzImage context
- * @v dst		bzImage to update
- */
-static void bzimage_update_header ( struct image *image,
-				    struct bzimage_context *bzimg,
-				    userptr_t dst ) {
-
-	/* Set loader type */
-	if ( bzimg->version >= 0x0200 )
-		bzimg->bzhdr.type_of_loader = BZI_LOADER_TYPE_GPXE;
-
-	/* Set heap end pointer */
-	if ( bzimg->version >= 0x0201 ) {
-		bzimg->bzhdr.heap_end_ptr = ( bzimg->rm_heap - 0x200 );
-		bzimg->bzhdr.loadflags |= BZI_CAN_USE_HEAP;
-	}
-
-	/* Set command line */
-	if ( bzimg->version >= 0x0202 ) {
-		bzimg->bzhdr.cmd_line_ptr = user_to_phys ( bzimg->rm_kernel,
-							   bzimg->rm_cmdline );
-	} else {
-		bzimg->cmdline_magic.magic = BZI_CMDLINE_MAGIC;
-		bzimg->cmdline_magic.offset = bzimg->rm_cmdline;
-		bzimg->bzhdr.setup_move_size = bzimg->rm_memsz;
-	}
-
-	/* Set video mode */
-	bzimg->bzhdr.vid_mode = bzimg->vid_mode;
-
-	/* Set initrd address */
-	if ( bzimg->version >= 0x0200 ) {
-		bzimg->bzhdr.ramdisk_image = bzimg->ramdisk_image;
-		bzimg->bzhdr.ramdisk_size = bzimg->ramdisk_size;
-	}
-
-	/* Write out header structures */
-	copy_to_user ( dst, BZI_CMDLINE_OFFSET, &bzimg->cmdline_magic,
-		       sizeof ( bzimg->cmdline_magic ) );
-	copy_to_user ( dst, BZI_HDR_OFFSET, &bzimg->bzhdr,
-		       sizeof ( bzimg->bzhdr ) );
-
-	DBGC ( image, "bzImage %p vidmode %d\n", image, bzimg->vid_mode );
-}
-
-/**
- * Parse kernel command line for bootloader parameters
- *
- * @v image		bzImage file
- * @v bzimg		bzImage context
- * @v cmdline		Kernel command line
- * @ret rc		Return status code
- */
-static int bzimage_parse_cmdline ( struct image *image,
-				   struct bzimage_context *bzimg,
-				   const char *cmdline ) {
-	char *vga;
-	char *mem;
-
-	/* Look for "vga=" */
-	if ( ( vga = strstr ( cmdline, "vga=" ) ) ) {
-		vga += 4;
-		if ( strcmp ( vga, "normal" ) == 0 ) {
-			bzimg->vid_mode = BZI_VID_MODE_NORMAL;
-		} else if ( strcmp ( vga, "ext" ) == 0 ) {
-			bzimg->vid_mode = BZI_VID_MODE_EXT;
-		} else if ( strcmp ( vga, "ask" ) == 0 ) {
-			bzimg->vid_mode = BZI_VID_MODE_ASK;
-		} else {
-			bzimg->vid_mode = strtoul ( vga, &vga, 0 );
-			if ( *vga && ( *vga != ' ' ) ) {
-				DBGC ( image, "bzImage %p strange \"vga=\""
-				       "terminator '%c'\n", image, *vga );
-			}
-		}
-	}
-
-	/* Look for "mem=" */
-	if ( ( mem = strstr ( cmdline, "mem=" ) ) ) {
-		mem += 4;
-		bzimg->mem_limit = strtoul ( mem, &mem, 0 );
-		switch ( *mem ) {
-		case 'G':
-		case 'g':
-			bzimg->mem_limit <<= 10;
-		case 'M':
-		case 'm':
-			bzimg->mem_limit <<= 10;
-		case 'K':
-		case 'k':
-			bzimg->mem_limit <<= 10;
-			break;
-		case '\0':
-		case ' ':
-			break;
-		default:
-			DBGC ( image, "bzImage %p strange \"mem=\" "
-			       "terminator '%c'\n", image, *mem );
-			break;
-		}
-		bzimg->mem_limit -= 1;
-	}
-
-	return 0;
-}
-
-/**
- * Set command line
- *
- * @v image		bzImage image
- * @v bzimg		bzImage context
- * @v cmdline		Kernel command line
- * @ret rc		Return status code
- */
-static int bzimage_set_cmdline ( struct image *image,
-				 struct bzimage_context *bzimg,
-				 const char *cmdline ) {
-	size_t cmdline_len;
-
-	/* Copy command line down to real-mode portion */
-	cmdline_len = ( strlen ( cmdline ) + 1 );
-	if ( cmdline_len > bzimg->cmdline_size )
-		cmdline_len = bzimg->cmdline_size;
-	copy_to_user ( bzimg->rm_kernel, bzimg->rm_cmdline,
-		       cmdline, cmdline_len );
-	DBGC ( image, "bzImage %p command line \"%s\"\n", image, cmdline );
-
-	return 0;
-}
-
-/**
- * Load initrd
- *
- * @v image		bzImage image
- * @v initrd		initrd image
- * @v address		Address at which to load, or UNULL
- * @ret len		Length of loaded image, rounded up to 4 bytes
- */
-static size_t bzimage_load_initrd ( struct image *image,
-				    struct image *initrd,
-				    userptr_t address ) {
-	char *filename = initrd->cmdline;
-	struct cpio_header cpio;
-        size_t offset = 0;
-
-	/* Do not include kernel image itself as an initrd */
-	if ( initrd == image )
-		return 0;
-
-	/* Create cpio header before non-prebuilt images */
-	if ( filename && filename[0] ) {
-		size_t name_len = ( strlen ( filename ) + 1 );
-
-		DBGC ( image, "bzImage %p inserting initrd %p as %s\n",
-		       image, initrd, filename );
-		memset ( &cpio, '0', sizeof ( cpio ) );
-		memcpy ( cpio.c_magic, CPIO_MAGIC, sizeof ( cpio.c_magic ) );
-		cpio_set_field ( cpio.c_mode, 0100644 );
-		cpio_set_field ( cpio.c_nlink, 1 );
-		cpio_set_field ( cpio.c_filesize, initrd->len );
-		cpio_set_field ( cpio.c_namesize, name_len );
-		if ( address ) {
-			copy_to_user ( address, offset, &cpio,
-				       sizeof ( cpio ) );
-		}
-		offset += sizeof ( cpio );
-		if ( address ) {
-			copy_to_user ( address, offset, filename,
-				       name_len );
-		}
-		offset += name_len;
-		offset = ( ( offset + 0x03 ) & ~0x03 );
-	}
-
-	/* Copy in initrd image body */
-	if ( address )
-		memcpy_user ( address, offset, initrd->data, 0, initrd->len );
-	offset += initrd->len;
-	if ( address ) {
-		DBGC ( image, "bzImage %p has initrd %p at [%lx,%lx)\n",
-		       image, initrd, user_to_phys ( address, 0 ),
-		       user_to_phys ( address, offset ) );
-	}
-
-	/* Round up to 4-byte boundary */
-	offset = ( ( offset + 0x03 ) & ~0x03 );
-	return offset;
-}
-
-/**
- * Load initrds, if any
- *
- * @v image		bzImage image
- * @v bzimg		bzImage context
- * @ret rc		Return status code
- */
-static int bzimage_load_initrds ( struct image *image,
-				  struct bzimage_context *bzimg ) {
-	struct image *initrd;
-	size_t total_len = 0;
-	physaddr_t address;
-	int rc;
-
-	/* Add up length of all initrd images */
-	for_each_image ( initrd )
-		total_len += bzimage_load_initrd ( image, initrd, UNULL );
-
-	/* Give up if no initrd images found */
-	if ( ! total_len )
-		return 0;
-
-	/* Find a suitable start address.  Try 1MB boundaries,
-	 * starting from the downloaded kernel image itself and
-	 * working downwards until we hit an available region.
-	 */
-	for ( address = ( user_to_phys ( image->data, 0 ) & ~0xfffff ) ; ;
-	      address -= 0x100000 ) {
-		/* Check that we're not going to overwrite the
-		 * kernel itself.  This check isn't totally
-		 * accurate, but errs on the side of caution.
-		 */
-		if ( address <= ( BZI_LOAD_HIGH_ADDR + image->len ) ) {
-			DBGC ( image, "bzImage %p could not find a location "
-			       "for initrd\n", image );
-			return -ENOBUFS;
-		}
-		/* Check that we are within the kernel's range */
-		if ( ( address + total_len - 1 ) > bzimg->mem_limit )
-			continue;
-		/* Prepare and verify segment */
-		if ( ( rc = prep_segment ( phys_to_user ( address ), 0,
-					   total_len ) ) != 0 )
-			continue;
-		/* Use this address */
-		break;
-	}
-
-	/* Record initrd location */
-	bzimg->ramdisk_image = address;
-	bzimg->ramdisk_size = total_len;
-
-	/* Construct initrd */
-	DBGC ( image, "bzImage %p constructing initrd at [%lx,%lx)\n",
-	       image, address, ( address + total_len ) );
-	for_each_image ( initrd ) {
-		address += bzimage_load_initrd ( image, initrd,
-						 phys_to_user ( address ) );
-	}
-
-	return 0;
-}
-
-/**
- * Execute bzImage image
- *
- * @v image		bzImage image
- * @ret rc		Return status code
- */
-static int bzimage_exec ( struct image *image ) {
-	struct bzimage_context bzimg;
-	const char *cmdline = ( image->cmdline ? image->cmdline : "" );
-	int rc;
-
-	/* Read and parse header from loaded kernel */
-	if ( ( rc = bzimage_parse_header ( image, &bzimg,
-					   image->priv.user ) ) != 0 )
-		return rc;
-	assert ( bzimg.rm_kernel == image->priv.user );
-
-	/* Parse command line for bootloader parameters */
-	if ( ( rc = bzimage_parse_cmdline ( image, &bzimg, cmdline ) ) != 0)
-		return rc;
-
-	/* Store command line */
-	if ( ( rc = bzimage_set_cmdline ( image, &bzimg, cmdline ) ) != 0 )
-		return rc;
-
-	/* Load any initrds */
-	if ( ( rc = bzimage_load_initrds ( image, &bzimg ) ) != 0 )
-		return rc;
-
-	/* Update kernel header */
-	bzimage_update_header ( image, &bzimg, bzimg.rm_kernel );
-
-	/* Prepare for exiting */
-	shutdown ( SHUTDOWN_BOOT );
-
-	DBGC ( image, "bzImage %p jumping to RM kernel at %04x:0000 "
-	       "(stack %04x:%04zx)\n", image, ( bzimg.rm_kernel_seg + 0x20 ),
-	       bzimg.rm_kernel_seg, bzimg.rm_heap );
-
-	/* Jump to the kernel */
-	__asm__ __volatile__ ( REAL_CODE ( "movw %w0, %%ds\n\t"
-					   "movw %w0, %%es\n\t"
-					   "movw %w0, %%fs\n\t"
-					   "movw %w0, %%gs\n\t"
-					   "movw %w0, %%ss\n\t"
-					   "movw %w1, %%sp\n\t"
-					   "pushw %w2\n\t"
-					   "pushw $0\n\t"
-					   "lret\n\t" )
-			       : : "r" ( bzimg.rm_kernel_seg ),
-			           "r" ( bzimg.rm_heap ),
-			           "r" ( bzimg.rm_kernel_seg + 0x20 ) );
-
-	/* There is no way for the image to return, since we provide
-	 * no return address.
-	 */
-	assert ( 0 );
-
-	return -ECANCELED; /* -EIMPOSSIBLE */
-}
-
-/**
- * Load bzImage image into memory
- *
- * @v image		bzImage file
- * @ret rc		Return status code
- */
-int bzimage_load ( struct image *image ) {
-	struct bzimage_context bzimg;
-	int rc;
-
-	/* Read and parse header from image */
-	if ( ( rc = bzimage_parse_header ( image, &bzimg,
-					   image->data ) ) != 0 )
-		return rc;
-
-	/* This is a bzImage image, valid or otherwise */
-	if ( ! image->type )
-		image->type = &bzimage_image_type;
-
-	/* Prepare segments */
-	if ( ( rc = prep_segment ( bzimg.rm_kernel, bzimg.rm_filesz,
-				   bzimg.rm_memsz ) ) != 0 ) {
-		DBGC ( image, "bzImage %p could not prepare RM segment: %s\n",
-		       image, strerror ( rc ) );
-		return rc;
-	}
-	if ( ( rc = prep_segment ( bzimg.pm_kernel, bzimg.pm_sz,
-				   bzimg.pm_sz ) ) != 0 ) {
-		DBGC ( image, "bzImage %p could not prepare PM segment: %s\n",
-		       image, strerror ( rc ) );
-		return rc;
-	}
-
-	/* Load segments */
-	memcpy_user ( bzimg.rm_kernel, 0, image->data,
-		      0, bzimg.rm_filesz );
-	memcpy_user ( bzimg.pm_kernel, 0, image->data,
-		      bzimg.rm_filesz, bzimg.pm_sz );
-
-	/* Update and write out header */
-	bzimage_update_header ( image, &bzimg, bzimg.rm_kernel );
-
-	/* Record real-mode segment in image private data field */
-	image->priv.user = bzimg.rm_kernel;
-
-	return 0;
-}
-
-/** Linux bzImage image type */
-struct image_type bzimage_image_type __image_type ( PROBE_NORMAL ) = {
-	.name = "bzImage",
-	.load = bzimage_load,
-	.exec = bzimage_exec,
-};