patch-2.1.48 linux/arch/ppc/boot/mk_type41.c
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- Lines: 209
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.1.47/linux/arch/ppc/boot/mk_type41.c
- Orig date:
Wed Dec 18 00:49:52 1996
diff -u --recursive --new-file v2.1.47/linux/arch/ppc/boot/mk_type41.c linux/arch/ppc/boot/mk_type41.c
@@ -1,208 +0,0 @@
-/*
- * This program will make a type 0x41 load image from an
- * executable file. Note: assumes that the executable has
- * already been "flattened" by 'mkboot'.
- *
- * usage: mk_type41 flat-file image
- */
-
-#include <stdio.h>
-#include <errno.h>
-#ifdef linux
-#include <asm/stat.h>
-#else
-#include <sys/stat.h>
-#endif
-
-_LE(long val, unsigned char *le)
-{
- le[0] = val;
- le[1] = val >> 8;
- le[2] = val >> 16;
- le[3] = val >> 24;
-}
-
-main(int argc, char *argv[])
-{
- int in_fd, out_fd, len, size;
- struct stat info;
- char buf[8192];
- struct hdr
- {
- unsigned long entry_point;
- unsigned long image_length;
- } hdr;
- if (argc != 3)
- {
- fprintf(stderr, "usage: mk_type41 <boot-file> <image>\n");
- exit(1);
- }
- if ((in_fd = open(argv[1], 0)) < 0)
- {
- fprintf(stderr, "Can't open input file: '%s': %s\n", argv[1], strerror(errno));
- exit(2);
- }
- if ((out_fd = creat(argv[2], 0666)) < 0)
- {
- fprintf(stderr, "Can't create output file: '%s': %s\n", argv[2], strerror(errno));
- exit(2);
- }
- if (fstat(in_fd, &info) < 0)
- {
- fprintf(stderr, "Can't get info on input file: %s\n", strerror(errno));
- exit(4);
- }
- write_prep_boot_partition(out_fd);
- _LE(0x400, &hdr.entry_point);
- _LE(info.st_size+0x400, &hdr.image_length);
- lseek(out_fd, 0x200, 0);
- if (write(out_fd, &hdr, sizeof(hdr)) != sizeof(hdr))
- {
- fprintf(stderr, "Can't write output file: %s\n", strerror(errno));
- exit(5);
- }
- lseek(out_fd, 0x400, 0);
- while ((len = read(in_fd, buf, sizeof(buf))) > 0)
- {
- if (write(out_fd, buf, len) != len)
- {
- fprintf(stderr, "Can't write output file: %s\n", strerror(errno));
- exit(5);
- }
- }
- if (len < 0)
- {
- fprintf(stderr, "Can't read input file: %s\n", strerror(errno));
- exit(6);
- }
- close(in_fd);
- close(out_fd);
-}
-
-/* Adapted from IBM Naked Application Package (NAP) */
-
-#define Align(value,boundary) \
- (((value) + (boundary) - 1) & ~((boundary) - 1))
-
-#define HiByte(word) ((word_t)(word) >> 8)
-#define LoByte(word) ((word_t)(word) & 0xFF)
-
-#define HiWord(dword) ((dword_t)(dword) >> 16)
-#define LoWord(dword) ((dword_t)(dword) & 0xFFFF)
-
-/*
- * Little-endian stuff
- */
-#define LeWord(word) \
- (((word_t)(word) >> 8) | ((word_t)(word) << 8))
-
-#define LeDword(dword) \
- (LeWord(LoWord(dword)) << 16) | LeWord(HiWord(dword))
-
-#define PcDword(dword) \
- (LeWord(LoWord(dword)) << 16) | LeWord(HiWord(dword))
-
-
-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
-
-
-/*
- * Writes the "boot record", which contains the partition table, to the
- * diskette, followed by the dummy PC boot block and load image descriptor
- * block. It returns the number of bytes it has written to the load
- * image.
- *
- * The boot record is the first block of the diskette and identifies the
- * "PReP" partition. The "PReP" partition contains the "load image" starting
- * at offset zero within the partition. The first block of the load image is
- * a dummy PC boot block. The second block is the "load image descriptor"
- * which contains the size of the load image and the entry point into the
- * image. The actual boot image starts at offset 1024 bytes (third sector)
- * in the partition.
- */
-void
-write_prep_boot_partition(int out_fd)
-{
- block_t block;
- partition_entry_t *pe = (partition_entry_t *)&block[0x1BE];
- dword_t *entry = (dword_t *)&block[0];
- dword_t *length = (dword_t *)&block[4];
-
- bzero( &block, sizeof block );
-
- /*
- * Magic marker
- */
- 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 = LeDword(1);
-#else
- /* This has to be 0 on the PowerStack? */
- pe->beginning_sector = LeDword(0);
-#endif
- pe->number_of_sectors = LeDword(2*18*80-1);
-
- /*
- * Write the partition table
- */
- lseek( out_fd, 0, 0 );
- write( out_fd, block, sizeof block );
-}
-
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