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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6: (25 commits) atyfb: Fix bootup hangs on sparc64. sparc: update copyright in piggyback.c sparc: unify strip command in boot/Makefile sparc: rename piggyback_32 to piggyback sparc: fix tftpboot.img for sparc64 on little-endian host sparc: add $BITS to piggyback arguments sparc: remove obsolete ELF support in piggyback_32.c sparc: additional comments to piggyback_32.c sparc: use _start for the start entry (like 64 bit does) sparc: use trapbase in setup_arch sparc: refactor piggy_32.c Added support for ampopts in APBUART driver. Used in AMP systems. APBUART: added raw AMBA vendor/device number to match against. SPARC/LEON: avoid AMBAPP name duplicates in openprom fs when REG is missing SPARC/LEON: added support for selecting Timer Core and Timer within core LEON: added raw AMBA vendor/device number to find TIMER, IRQCTRL SPARC/LEON: added support for IRQAMP IRQ Controller SPARC/LEON: find IRQCTRL and Timer via OF-Tree, instead of hardcoded. sparc: fix sparse warnings in arch/sparc/prom for 32 bit build sparc: remove unused prom tree functions ...
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,272 @@ | ||
| /* | ||
| Simple utility to make a single-image install kernel with initial ramdisk | ||
| for Sparc tftpbooting without need to set up nfs. | ||
| Copyright (C) 1996,1997 Jakub Jelinek ([email protected]) | ||
| Pete Zaitcev <[email protected]> endian fixes for cross-compiles, 2000. | ||
| Copyright (C) 2011 Sam Ravnborg <[email protected]> | ||
| 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 | ||
| (at your option) 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. */ | ||
|
|
||
| #include <dirent.h> | ||
| #include <stdlib.h> | ||
| #include <string.h> | ||
| #include <unistd.h> | ||
| #include <ctype.h> | ||
| #include <errno.h> | ||
| #include <fcntl.h> | ||
| #include <stdio.h> | ||
|
|
||
| #include <sys/types.h> | ||
| #include <sys/stat.h> | ||
|
|
||
| /* | ||
| * Note: run this on an a.out kernel (use elftoaout for it), | ||
| * as PROM looks for a.out image only. | ||
| */ | ||
|
|
||
| #define AOUT_TEXT_OFFSET 32 | ||
|
|
||
| static int is64bit = 0; | ||
|
|
||
| /* align to power-of-two size */ | ||
| static int align(int n) | ||
| { | ||
| if (is64bit) | ||
| return (n + 0x1fff) & ~0x1fff; | ||
| else | ||
| return (n + 0xfff) & ~0xfff; | ||
| } | ||
|
|
||
| /* read two bytes as big endian */ | ||
| static unsigned short ld2(char *p) | ||
| { | ||
| return (p[0] << 8) | p[1]; | ||
| } | ||
|
|
||
| /* save 4 bytes as big endian */ | ||
| static void st4(char *p, unsigned int x) | ||
| { | ||
| p[0] = x >> 24; | ||
| p[1] = x >> 16; | ||
| p[2] = x >> 8; | ||
| p[3] = x; | ||
| } | ||
|
|
||
| static void die(const char *str) | ||
| { | ||
| perror(str); | ||
| exit(1); | ||
| } | ||
|
|
||
| static void usage(void) | ||
| { | ||
| /* fs_img.gz is an image of initial ramdisk. */ | ||
| fprintf(stderr, "Usage: piggyback bits vmlinux.aout System.map fs_img.gz\n"); | ||
| fprintf(stderr, "\tKernel image will be modified in place.\n"); | ||
| exit(1); | ||
| } | ||
|
|
||
| static int start_line(const char *line) | ||
| { | ||
| if (strcmp(line + 8, " T _start\n") == 0) | ||
| return 1; | ||
| else if (strcmp(line + 16, " T _start\n") == 0) | ||
| return 1; | ||
| return 0; | ||
| } | ||
|
|
||
| static int end_line(const char *line) | ||
| { | ||
| if (strcmp(line + 8, " A _end\n") == 0) | ||
| return 1; | ||
| else if (strcmp (line + 16, " A _end\n") == 0) | ||
| return 1; | ||
| return 0; | ||
| } | ||
|
|
||
| /* | ||
| * Find address for start and end in System.map. | ||
| * The file looks like this: | ||
| * f0004000 T _start | ||
| * f0379f79 A _end | ||
| * 1234567890123456 | ||
| * ^coloumn 1 | ||
| * There is support for 64 bit addresses too. | ||
| * | ||
| * Return 0 if either start or end is not found | ||
| */ | ||
| static int get_start_end(const char *filename, unsigned int *start, | ||
| unsigned int *end) | ||
| { | ||
| FILE *map; | ||
| char buffer[1024]; | ||
|
|
||
| *start = 0; | ||
| *end = 0; | ||
| map = fopen(filename, "r"); | ||
| if (!map) | ||
| die(filename); | ||
| while (fgets(buffer, 1024, map)) { | ||
| if (start_line(buffer)) | ||
| *start = strtoul(buffer, NULL, 16); | ||
| else if (end_line(buffer)) | ||
| *end = strtoul(buffer, NULL, 16); | ||
| } | ||
| fclose (map); | ||
|
|
||
| if (*start == 0 || *end == 0) | ||
| return 0; | ||
|
|
||
| return 1; | ||
| } | ||
|
|
||
| #define LOOKBACK (128 * 4) | ||
| #define BUFSIZE 1024 | ||
| /* | ||
| * Find the HdrS entry from head_32/head_64. | ||
| * We check if it is at the beginning of the file (sparc64 case) | ||
| * and if not we search for it. | ||
| * When we search do so in steps of 4 as HdrS is on a 4-byte aligned | ||
| * address (it is on same alignment as sparc instructions) | ||
| * Return the offset to the HdrS entry (as off_t) | ||
| */ | ||
| static off_t get_hdrs_offset(int kernelfd, const char *filename) | ||
| { | ||
| char buffer[BUFSIZE]; | ||
| off_t offset; | ||
| int i; | ||
|
|
||
| if (lseek(kernelfd, 0, SEEK_SET) < 0) | ||
| die("lseek"); | ||
| if (read(kernelfd, buffer, BUFSIZE) != BUFSIZE) | ||
| die(filename); | ||
|
|
||
| if (buffer[40] == 'H' && buffer[41] == 'd' && | ||
| buffer[42] == 'r' && buffer[43] == 'S') { | ||
| return 40; | ||
| } else { | ||
| /* Find the gokernel label */ | ||
| /* Decode offset from branch instruction */ | ||
| offset = ld2(buffer + AOUT_TEXT_OFFSET + 2) << 2; | ||
| /* Go back 512 bytes so we do not miss HdrS */ | ||
| offset -= LOOKBACK; | ||
| /* skip a.out header */ | ||
| offset += AOUT_TEXT_OFFSET; | ||
| if (lseek(kernelfd, offset, SEEK_SET) < 0) | ||
| die("lseek"); | ||
| if (read(kernelfd, buffer, BUFSIZE) != BUFSIZE) | ||
| die(filename); | ||
|
|
||
| for (i = 0; i < LOOKBACK; i += 4) { | ||
| if (buffer[i + 0] == 'H' && buffer[i + 1] == 'd' && | ||
| buffer[i + 2] == 'r' && buffer[i + 3] == 'S') { | ||
| return offset + i; | ||
| } | ||
| } | ||
| } | ||
| fprintf (stderr, "Couldn't find headers signature in %s\n", filename); | ||
| exit(1); | ||
| } | ||
|
|
||
| int main(int argc,char **argv) | ||
| { | ||
| static char aout_magic[] = { 0x01, 0x03, 0x01, 0x07 }; | ||
| char buffer[1024]; | ||
| unsigned int i, start, end; | ||
| off_t offset; | ||
| struct stat s; | ||
| int image, tail; | ||
|
|
||
| if (argc != 5) | ||
| usage(); | ||
| if (strcmp(argv[1], "64") == 0) | ||
| is64bit = 1; | ||
| if (stat (argv[4], &s) < 0) | ||
| die(argv[4]); | ||
|
|
||
| if (!get_start_end(argv[3], &start, &end)) { | ||
| fprintf(stderr, "Could not determine start and end from %s\n", | ||
| argv[3]); | ||
| exit(1); | ||
| } | ||
| if ((image = open(argv[2], O_RDWR)) < 0) | ||
| die(argv[2]); | ||
| if (read(image, buffer, 512) != 512) | ||
| die(argv[2]); | ||
| if (memcmp(buffer, aout_magic, 4) != 0) { | ||
| fprintf (stderr, "Not a.out. Don't blame me.\n"); | ||
| exit(1); | ||
| } | ||
| /* | ||
| * We need to fill in values for | ||
| * sparc_ramdisk_image + sparc_ramdisk_size | ||
| * To locate these symbols search for the "HdrS" text which appear | ||
| * in the image a little before the gokernel symbol. | ||
| * See definition of these in init_32.S | ||
| */ | ||
|
|
||
| offset = get_hdrs_offset(image, argv[2]); | ||
| /* skip HdrS + LINUX_VERSION_CODE + HdrS version */ | ||
| offset += 10; | ||
|
|
||
| if (lseek(image, offset, 0) < 0) | ||
| die("lseek"); | ||
|
|
||
| /* | ||
| * root_flags = 0 | ||
| * root_dev = 1 (RAMDISK_MAJOR) | ||
| * ram_flags = 0 | ||
| * sparc_ramdisk_image = "PAGE aligned address after _end") | ||
| * sparc_ramdisk_size = size of image | ||
| */ | ||
| st4(buffer, 0); | ||
| st4(buffer + 4, 0x01000000); | ||
| st4(buffer + 8, align(end + 32)); | ||
| st4(buffer + 12, s.st_size); | ||
|
|
||
| if (write(image, buffer + 2, 14) != 14) | ||
| die(argv[2]); | ||
|
|
||
| /* For sparc64 update a_text and clear a_data + a_bss */ | ||
| if (is64bit) | ||
| { | ||
| if (lseek(image, 4, 0) < 0) | ||
| die("lseek"); | ||
| /* a_text */ | ||
| st4(buffer, align(end + 32 + 8191) - (start & ~0x3fffffUL) + | ||
| s.st_size); | ||
| /* a_data */ | ||
| st4(buffer + 4, 0); | ||
| /* a_bss */ | ||
| st4(buffer + 8, 0); | ||
| if (write(image, buffer, 12) != 12) | ||
| die(argv[2]); | ||
| } | ||
|
|
||
| /* seek page aligned boundary in the image file and add boot image */ | ||
| if (lseek(image, AOUT_TEXT_OFFSET - start + align(end + 32), 0) < 0) | ||
| die("lseek"); | ||
| if ((tail = open(argv[4], O_RDONLY)) < 0) | ||
| die(argv[4]); | ||
| while ((i = read(tail, buffer, 1024)) > 0) | ||
| if (write(image, buffer, i) != i) | ||
| die(argv[2]); | ||
| if (close(image) < 0) | ||
| die("close"); | ||
| if (close(tail) < 0) | ||
| die("close"); | ||
| return 0; | ||
| } |
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