ref: 9f76a7f6819ac04552b4fb6588156f3e4089d1d7
dir: /utils/mkppcimage/mkppcimage.c/
/*
* generate the special header needed by DENX's ppcboot
*/
#include <lib9.h>
#include <bio.h>
#include <mach.h>
/*
* the following values are all determined by PPCBOOT
*/
enum {
/* OS code */
IH_OS_NCR = 12, /* we'll use this for the time being; there isn't a general purpose one */
/* CPU code */
IH_CPU_ARM = 2,
IH_CPU_PPC = 7,
/* image type */
IH_TYPE_KERNEL = 2, /* OS kernel */
/* compression type */
IH_COMP_NONE = 0, /* none: if i need one, i'll use sqz internally, much faster */
IH_MAGIC = 0x27051956, /* Image Magic Number */
IH_NMLEN = 32 /* image name length */
};
typedef struct Imagehdr Imagehdr;
struct Imagehdr
{
ulong magic; /* image header magic number */
ulong hcrc; /* image header crc */
ulong time; /* image creation timestamp */
ulong size; /* image data size */
ulong load; /* data load address */
ulong entry; /* entry point address */
ulong dcrc; /* image data crc */
uchar os; /* operating system */
uchar arch; /* cpu type */
uchar type; /* image type */
uchar comp; /* compression type */
char name[IH_NMLEN]; /* image name */
};
static Imagehdr ih;
static char *fname;
static ulong crc32(ulong, uchar*, unsigned int);
static long Read(int, void*, long);
static void Write(int, void*, long);
/*
* data is big endian
*/
static ulong
swal(ulong l)
{
return beswal(l);
}
void
usage(void)
{
fprint(2, "usage: mkppcimage [-l loadaddr] q.out ppcboot.out\n");
exits("usage");
}
void
main(int argc, char **argv)
{
int fd, ofd;
long len;
uchar *data;
ulong load, entry;
Exec ex;
int arch;
load = ~0;
entry = ~0;
ARGBEGIN{
case 'l':
load = strtoul(EARGF(usage()), nil, 0);
entry = load + sizeof(Exec);
break;
}ARGEND
if(*argv == nil || argv[1] == nil)
usage();
fname = *argv;
fd = open(*argv, OREAD);
if(fd < 0){
fprint(2, "mkppcimage: can't open %s: %r\n", *argv);
exits("image");
}
Read(fd, &ex, sizeof(Exec));
switch(beswal(ex.magic)){
case Q_MAGIC: /* powerpc */
arch = IH_CPU_PPC;
break;
case E_MAGIC: /* arm */
arch = IH_CPU_ARM;
break;
default:
arch = 0;
fprint(2, "mkppcboot: unknown magic: %8.8lux\n", beswal(ex.magic));
exits("bad magic");
}
len = beswal(ex.text);
len += beswal(ex.data);
if(load == ~0){
entry = beswal(ex.entry);
entry &= ~0xFF000000; /* physical address */
load = entry - sizeof(Exec);
}
data = malloc(len+sizeof(Exec));
if(data == nil){
fprint(2, "mkppcimage: can't allocate data: %r\n");
exits("mem");
}
memmove(data, &ex, sizeof(Exec));
Read(fd, data+sizeof(Exec), len);
len += sizeof(Exec);
ih.magic = swal(IH_MAGIC);
ih.hcrc = 0;
ih.time = swal(time(0));
ih.size = swal(len);
ih.load = swal(load);
ih.entry = swal(entry);
ih.dcrc = swal(crc32(0, data, len));
ih.os = IH_OS_NCR; /* why not */
ih.arch = arch;
ih.type = IH_TYPE_KERNEL;
ih.comp = IH_COMP_NONE;
strcpy(ih.name, "Himmel!");
ih.hcrc = swal(crc32(0, (uchar*)&ih, sizeof(ih)));
ofd = create(argv[1], OWRITE, 0666);
if(ofd < 0){
fprint(2, "mkppcimage: can't create %s: %r\n", argv[1]);
exits("image");
}
Write(ofd, &ih, sizeof(ih));
Write(ofd, data, len);
exits(nil);
}
static long
Read(int fd, void *buf, long nb)
{
long n;
n = readn(fd, buf, nb);
if(n < 0){
fprint(2, "mkppcimage: %s: read error: %r\n", fname);
exits("read");
}
if(n < nb){
fprint(2, "mkppcimage: %s: unexpected end-of-file\n", fname);
exits("read");
}
return n;
}
static void
Write(int fd, void *buf, long nb)
{
if(write(fd, buf, nb) != nb){
fprint(2, "mkppcboot: write error: %r\n");
exits("write err");
}
}
/*
* The remainder of this file is derived from crc32.c from the zlib-1.1.3 distribution
* by Jean-loup Gailly and Mark Adler.
*/
/* crc32.c -- compute the CRC-32 of a data stream
* Copyright (C) 1995-1998 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* ========================================================================
* Table of CRC-32's of all single-byte values (made by make_crc_table)
*/
static ulong crc_table[256] = {
0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
0x2d02ef8dL
};
#define DO1(buf) crc = crc_table[((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8);
#define DO2(buf) DO1(buf); DO1(buf);
#define DO4(buf) DO2(buf); DO2(buf);
#define DO8(buf) DO4(buf); DO4(buf);
static ulong
crc32(ulong crc, uchar *buf, unsigned len)
{
crc = ~crc;
while (len >= 8) {
DO8(buf);
len -= 8;
}
if (len) do {
DO1(buf);
} while (--len);
return ~crc;
}