^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Makes a tree bootable image for IBM Evaluation boards.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Basically, just take a zImage, skip the ELF header, and stuff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * a 32 byte header on the front.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * We use htonl, which is a network macro, to make sure we're doing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * The Right Thing on an LE machine. It's non-obvious, but it should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * work on anything BSD'ish.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <sys/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <netinet/in.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #ifdef __sun__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <inttypes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <stdint.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* This gets tacked on the front of the image. There are also a few
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * bytes allocated after the _start label used by the boot rom (see
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * head.S for details).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) typedef struct boot_block {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) uint32_t bb_magic; /* 0x0052504F */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) uint32_t bb_dest; /* Target address of the image */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) uint32_t bb_num_512blocks; /* Size, rounded-up, in 512 byte blks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) uint32_t bb_debug_flag; /* Run debugger or image after load */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) uint32_t bb_entry_point; /* The image address to start */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) uint32_t bb_checksum; /* 32 bit checksum including header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) uint32_t reserved[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) } boot_block_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define IMGBLK 512
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) unsigned int tmpbuf[IMGBLK / sizeof(unsigned int)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int main(int argc, char *argv[])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) int in_fd, out_fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) int nblks, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) unsigned int cksum, *cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) boot_block_t bt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (argc < 5) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) fprintf(stderr, "usage: %s <zImage-file> <boot-image> <load address> <entry point>\n",argv[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (stat(argv[1], &st) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) perror("stat");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) exit(2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) nblks = (st.st_size + IMGBLK) / IMGBLK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) bt.bb_magic = htonl(0x0052504F);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /* If we have the optional entry point parameter, use it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) bt.bb_dest = htonl(strtoul(argv[3], NULL, 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) bt.bb_entry_point = htonl(strtoul(argv[4], NULL, 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* We know these from the linker command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * ...and then move it up into memory a little more so the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * relocation can happen.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) bt.bb_num_512blocks = htonl(nblks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) bt.bb_debug_flag = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) bt.bb_checksum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) /* To be neat and tidy :-).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) bt.reserved[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) bt.reserved[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if ((in_fd = open(argv[1], O_RDONLY)) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) perror("zImage open");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) exit(3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if ((out_fd = open(argv[2], (O_RDWR | O_CREAT | O_TRUNC), 0666)) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) perror("bootfile open");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) exit(3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) cksum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) cp = (void *)&bt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) for (i = 0; i < sizeof(bt) / sizeof(unsigned int); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) cksum += *cp++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) /* Assume zImage is an ELF file, and skip the 64K header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (read(in_fd, tmpbuf, sizeof(tmpbuf)) != sizeof(tmpbuf)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) fprintf(stderr, "%s is too small to be an ELF image\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) argv[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) exit(4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (tmpbuf[0] != htonl(0x7f454c46)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) fprintf(stderr, "%s is not an ELF image\n", argv[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) exit(4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (lseek(in_fd, (64 * 1024), SEEK_SET) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) fprintf(stderr, "%s failed to seek in ELF image\n", argv[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) exit(4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) nblks -= (64 * 1024) / IMGBLK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) /* And away we go......
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (write(out_fd, &bt, sizeof(bt)) != sizeof(bt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) perror("boot-image write");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) exit(5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) while (nblks-- > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (read(in_fd, tmpbuf, sizeof(tmpbuf)) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) perror("zImage read");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) exit(5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) cp = tmpbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) for (i = 0; i < sizeof(tmpbuf) / sizeof(unsigned int); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) cksum += *cp++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (write(out_fd, tmpbuf, sizeof(tmpbuf)) != sizeof(tmpbuf)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) perror("boot-image write");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) exit(5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /* rewrite the header with the computed checksum.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) bt.bb_checksum = htonl(cksum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (lseek(out_fd, 0, SEEK_SET) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) perror("rewrite seek");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (write(out_fd, &bt, sizeof(bt)) != sizeof(bt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) perror("boot-image rewrite");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) exit(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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