patch-2.4.5 linux/arch/ppc/boot/mkprep.c

• Lines: 288
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.4/linux/arch/ppc/boot/mkprep.c
• Orig date: Thu Apr 29 12:39:01 1999

diff -u --recursive --new-file v2.4.4/linux/arch/ppc/boot/mkprep.c linux/arch/ppc/boot/mkprep.c
@@ -1,287 +0,0 @@
-/*
- * Makes a prep bootable image which can be dd'd onto
- * a disk device to make a bootdisk.  Will take
- * as input a elf executable, strip off the header
- * and write out a boot image as:
- * 1) default - strips elf header
- *      suitable as a network boot image
- * 2) -pbp - strips elf header and writes out prep boot partition image
- *      cat or dd onto disk for booting
- * 3) -asm - strips elf header and writes out as asm data
- *      useful for generating data for a compressed image
- *                  -- Cort
- *
- * Modified for x86 hosted builds by Matt Porter <porter@neta.com>
- */
-
-#include <unistd.h>
-#include <sys/stat.h>
-#include <stdio.h>
-#include <errno.h>
-
-#define cpu_to_le32(x) le32_to_cpu((x))
-unsigned long le32_to_cpu(unsigned long x)
-{
-     	return (((x & 0x000000ffU) << 24) |
-		((x & 0x0000ff00U) <<  8) |
-		((x & 0x00ff0000U) >>  8) |
-		((x & 0xff000000U) >> 24));
-}
-
-
-#define cpu_to_le16(x) le16_to_cpu((x))
-unsigned short le16_to_cpu(unsigned short x)
-{
-	return (((x & 0x00ff) << 8) |
-		((x & 0xff00) >> 8));
-}
-
-#define cpu_to_be32(x) (x)
-#define be32_to_cpu(x) (x)
-#define cpu_to_be16(x) (x)
-#define be16_to_cpu(x) (x)
-
-/* size of read buffer */
-#define SIZE 0x1000
-
-
-typedef unsigned long dword_t;
-typedef unsigned short word_t;
-typedef unsigned char byte_t;
-typedef byte_t block_t[512];
-typedef byte_t page_t[4096];
-
-
-/*
- * Partition table entry
- *  - from the PReP spec
- */
-typedef struct partition_entry {
-  byte_t	boot_indicator;
-  byte_t	starting_head;
-  byte_t	starting_sector;
-  byte_t	starting_cylinder;
-
-  byte_t	system_indicator;
-  byte_t	ending_head;
-  byte_t	ending_sector;
-  byte_t	ending_cylinder;
-
-  dword_t	beginning_sector;
-  dword_t	number_of_sectors;
-} partition_entry_t;
-
-#define BootActive	0x80
-#define SystemPrep	0x41
-
-void copy_image(int , int);
-void write_prep_partition(int , int );
-void write_asm_data( int in, int out );
-
-unsigned int elfhdr_size = 65536;
-
-int main(int argc, char *argv[])
-{
-  int in_fd, out_fd;
-  int argptr = 1;
-  unsigned int prep = 0;
-  unsigned int asmoutput = 0;
-
-  if ( (argc < 3) || (argc > 4) )
-  {
-    fprintf(stderr, "usage: %s [-pbp] [-asm] <boot-file> <image>\n",argv[0]);
-    exit(-1);
-  }
-
-  /* needs to handle args more elegantly -- but this is a small/simple program */
-  
-  /* check for -pbp */
-  if ( !strcmp( argv[argptr], "-pbp" ) )
-  {
-    prep = 1;
-    argptr++;
-  }
-  
-  /* check for -asm */
-  if ( !strcmp( argv[argptr], "-asm" ) )
-  {
-    asmoutput = 1;
-    argptr++;
-  }
-
-  /* input file */
-  if ( !strcmp( argv[argptr], "-" ) )
-    in_fd = 0;			/* stdin */
-  else
-    if ((in_fd = open( argv[argptr] , 0)) < 0)
-      exit(-1);
-  argptr++;
-
-  /* output file */
-  if ( !strcmp( argv[argptr], "-" ) )
-    out_fd = 1;			/* stdout */
-  else
-    if ((out_fd = creat( argv[argptr] , 0755)) < 0)
-      exit(-1);
-  argptr++;
-
-  /* skip elf header in input file */
-  /*if ( !prep )*/
-  lseek(in_fd, elfhdr_size, SEEK_SET);
-  
-  /* write prep partition if necessary */
-  if ( prep )
-	  write_prep_partition( in_fd, out_fd );
-
-  /* write input image to bootimage */
-  if ( asmoutput )
-	  write_asm_data( in_fd, out_fd );
-  else
-	  copy_image(in_fd, out_fd);
-  
-  return 0;
-}
-
-void write_prep_partition(int in, int out)
-{
-  unsigned char block[512];
-  partition_entry_t *pe = (partition_entry_t *)&block[0x1BE];
-  dword_t *entry  = (dword_t *)&block[0];
-  dword_t *length = (dword_t *)&block[sizeof(long)];
-  struct stat info;
-  
-  if (fstat(in, &info) < 0)
-  {
-    fprintf(stderr,"info failed\n");
-    exit(-1);
-  }
-  
-  bzero( block, sizeof block );
- 
-  /* set entry point and boot image size skipping over elf header */
-#ifdef __i386__
-  *entry = 0x400/*+65536*/;
-  *length = info.st_size-elfhdr_size+0x400;
-#else
-  *entry = cpu_to_le32(0x400/*+65536*/);
-  *length = cpu_to_le32(info.st_size-elfhdr_size+0x400);
-#endif /* __i386__ */
-
-  /* sets magic number for msdos partition (used by linux) */
-  block[510] = 0x55;
-  block[511] = 0xAA;
-  
-  /*
-   * Build a "PReP" partition table entry in the boot record
-   *  - "PReP" may only look at the system_indicator
-   */
-  pe->boot_indicator   = BootActive;
-  pe->system_indicator = SystemPrep;
-  /*
-   * The first block of the diskette is used by this "boot record" which
-   * actually contains the partition table. (The first block of the
-   * partition contains the boot image, but I digress...)  We'll set up
-   * one partition on the diskette and it shall contain the rest of the
-   * diskette.
-   */
-  pe->starting_head     = 0;	/* zero-based			     */
-  pe->starting_sector   = 2;	/* one-based			     */
-  pe->starting_cylinder = 0;	/* zero-based			     */
-  pe->ending_head       = 1;	/* assumes two heads		     */
-  pe->ending_sector     = 18;	/* assumes 18 sectors/track	     */
-  pe->ending_cylinder   = 79;	/* assumes 80 cylinders/diskette     */
-
-  /*
-   * The "PReP" software ignores the above fields and just looks at
-   * the next two.
-   *   - size of the diskette is (assumed to be)
-   *     (2 tracks/cylinder)(18 sectors/tracks)(80 cylinders/diskette)
-   *   - unlike the above sector numbers, the beginning sector is zero-based!
-   */
-#if 0
-  pe->beginning_sector  = cpu_to_le32(1);
-#else
-  /* This has to be 0 on the PowerStack? */   
-#ifdef __i386__
-  pe->beginning_sector  = 0;
-#else
-  pe->beginning_sector  = cpu_to_le32(0);
-#endif /* __i386__ */
-#endif    
-
-#ifdef __i386__
-  pe->number_of_sectors = 2*18*80-1;
-#else
-  pe->number_of_sectors = cpu_to_le32(2*18*80-1);
-#endif /* __i386__ */
-
-  write( out, block, sizeof(block) );
-  write( out, entry, sizeof(*entry) );
-  write( out, length, sizeof(*length) );  
-  /* set file position to 2nd sector where image will be written */
-  lseek( out, 0x400, SEEK_SET );
-}
-
-
-
-void
-copy_image(int in, int out)
-{
-  char buf[SIZE];
-  int n;
-
-  while ( (n = read(in, buf, SIZE)) > 0 )
-    write(out, buf, n);
-}
-
-
-void
-write_asm_data( int in, int out )
-{
-  int i, cnt, pos, len;
-  unsigned int cksum, val;
-  unsigned char *lp;
-  unsigned char buf[SIZE];
-  unsigned char str[256];
-  
-  write( out, "\t.data\n\t.globl input_data\ninput_data:\n",
-	 strlen( "\t.data\n\t.globl input_data\ninput_data:\n" ) );
-  pos = 0;
-  cksum = 0;
-  while ((len = read(in, buf, sizeof(buf))) > 0)
-  {
-    cnt = 0;
-    lp = (unsigned char *)buf;
-    len = (len + 3) & ~3;  /* Round up to longwords */
-    for (i = 0;  i < len;  i += 4)
-    {
-      if (cnt == 0)
-      {
-	write( out, "\t.long\t", strlen( "\t.long\t" ) );
-      }
-      sprintf( str, "0x%02X%02X%02X%02X", lp[0], lp[1], lp[2], lp[3]);
-      write( out, str, strlen(str) );
-      val = *(unsigned long *)lp;
-      cksum ^= val;
-      lp += 4;
-      if (++cnt == 4)
-      {
-	cnt = 0;
-	sprintf( str, " # %x \n", pos+i-12);
-	write( out, str, strlen(str) );
-      } else
-      {
-	write( out, ",", 1 );
-      }
-    }
-    if (cnt)
-    {
-      write( out, "0\n", 2 );
-    }
-    pos += len;
-  }
-  sprintf(str, "\t.globl input_len\ninput_len:\t.long\t0x%x\n", pos);
-  write( out, str, strlen(str) );
-
-  fprintf(stderr, "cksum = %x\n", cksum);
-}