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Diffstat (limited to 'arch/ppc64/boot/addRamDisk.c')
-rw-r--r--arch/ppc64/boot/addRamDisk.c300
1 files changed, 0 insertions, 300 deletions
diff --git a/arch/ppc64/boot/addRamDisk.c b/arch/ppc64/boot/addRamDisk.c
deleted file mode 100644
index 7f2c0947339..00000000000
--- a/arch/ppc64/boot/addRamDisk.c
+++ /dev/null
@@ -1,300 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <netinet/in.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <string.h>
-
-#define ElfHeaderSize (64 * 1024)
-#define ElfPages (ElfHeaderSize / 4096)
-#define KERNELBASE (0xc000000000000000)
-
-void get4k(FILE *file, char *buf )
-{
- unsigned j;
- unsigned num = fread(buf, 1, 4096, file);
- for ( j=num; j<4096; ++j )
- buf[j] = 0;
-}
-
-void put4k(FILE *file, char *buf )
-{
- fwrite(buf, 1, 4096, file);
-}
-
-void death(const char *msg, FILE *fdesc, const char *fname)
-{
- fprintf(stderr, msg);
- fclose(fdesc);
- unlink(fname);
- exit(1);
-}
-
-int main(int argc, char **argv)
-{
- char inbuf[4096];
- FILE *ramDisk = NULL;
- FILE *sysmap = NULL;
- FILE *inputVmlinux = NULL;
- FILE *outputVmlinux = NULL;
-
- unsigned i = 0;
- unsigned long ramFileLen = 0;
- unsigned long ramLen = 0;
- unsigned long roundR = 0;
-
- unsigned long sysmapFileLen = 0;
- unsigned long sysmapLen = 0;
- unsigned long sysmapPages = 0;
- char* ptr_end = NULL;
- unsigned long offset_end = 0;
-
- unsigned long kernelLen = 0;
- unsigned long actualKernelLen = 0;
- unsigned long round = 0;
- unsigned long roundedKernelLen = 0;
- unsigned long ramStartOffs = 0;
- unsigned long ramPages = 0;
- unsigned long roundedKernelPages = 0;
- unsigned long hvReleaseData = 0;
- u_int32_t eyeCatcher = 0xc8a5d9c4;
- unsigned long naca = 0;
- unsigned long xRamDisk = 0;
- unsigned long xRamDiskSize = 0;
- long padPages = 0;
-
-
- if (argc < 2) {
- fprintf(stderr, "Name of RAM disk file missing.\n");
- exit(1);
- }
-
- if (argc < 3) {
- fprintf(stderr, "Name of System Map input file is missing.\n");
- exit(1);
- }
-
- if (argc < 4) {
- fprintf(stderr, "Name of vmlinux file missing.\n");
- exit(1);
- }
-
- if (argc < 5) {
- fprintf(stderr, "Name of vmlinux output file missing.\n");
- exit(1);
- }
-
-
- ramDisk = fopen(argv[1], "r");
- if ( ! ramDisk ) {
- fprintf(stderr, "RAM disk file \"%s\" failed to open.\n", argv[1]);
- exit(1);
- }
-
- sysmap = fopen(argv[2], "r");
- if ( ! sysmap ) {
- fprintf(stderr, "System Map file \"%s\" failed to open.\n", argv[2]);
- exit(1);
- }
-
- inputVmlinux = fopen(argv[3], "r");
- if ( ! inputVmlinux ) {
- fprintf(stderr, "vmlinux file \"%s\" failed to open.\n", argv[3]);
- exit(1);
- }
-
- outputVmlinux = fopen(argv[4], "w+");
- if ( ! outputVmlinux ) {
- fprintf(stderr, "output vmlinux file \"%s\" failed to open.\n", argv[4]);
- exit(1);
- }
-
-
-
- /* Input Vmlinux file */
- fseek(inputVmlinux, 0, SEEK_END);
- kernelLen = ftell(inputVmlinux);
- fseek(inputVmlinux, 0, SEEK_SET);
- printf("kernel file size = %d\n", kernelLen);
- if ( kernelLen == 0 ) {
- fprintf(stderr, "You must have a linux kernel specified as argv[3]\n");
- exit(1);
- }
-
- actualKernelLen = kernelLen - ElfHeaderSize;
-
- printf("actual kernel length (minus ELF header) = %d\n", actualKernelLen);
-
- round = actualKernelLen % 4096;
- roundedKernelLen = actualKernelLen;
- if ( round )
- roundedKernelLen += (4096 - round);
- printf("Vmlinux length rounded up to a 4k multiple = %ld/0x%lx \n", roundedKernelLen, roundedKernelLen);
- roundedKernelPages = roundedKernelLen / 4096;
- printf("Vmlinux pages to copy = %ld/0x%lx \n", roundedKernelPages, roundedKernelPages);
-
-
-
- /* Input System Map file */
- /* (needs to be processed simply to determine if we need to add pad pages due to the static variables not being included in the vmlinux) */
- fseek(sysmap, 0, SEEK_END);
- sysmapFileLen = ftell(sysmap);
- fseek(sysmap, 0, SEEK_SET);
- printf("%s file size = %ld/0x%lx \n", argv[2], sysmapFileLen, sysmapFileLen);
-
- sysmapLen = sysmapFileLen;
-
- roundR = 4096 - (sysmapLen % 4096);
- if (roundR) {
- printf("Rounding System Map file up to a multiple of 4096, adding %ld/0x%lx \n", roundR, roundR);
- sysmapLen += roundR;
- }
- printf("Rounded System Map size is %ld/0x%lx \n", sysmapLen, sysmapLen);
-
- /* Process the Sysmap file to determine where _end is */
- sysmapPages = sysmapLen / 4096;
- /* read the whole file line by line, expect that it doesn't fail */
- while ( fgets(inbuf, 4096, sysmap) ) ;
- /* search for _end in the last page of the system map */
- ptr_end = strstr(inbuf, " _end");
- if (!ptr_end) {
- fprintf(stderr, "Unable to find _end in the sysmap file \n");
- fprintf(stderr, "inbuf: \n");
- fprintf(stderr, "%s \n", inbuf);
- exit(1);
- }
- printf("Found _end in the last page of the sysmap - backing up 10 characters it looks like %s", ptr_end-10);
- /* convert address of _end in system map to hex offset. */
- offset_end = (unsigned int)strtol(ptr_end-10, NULL, 16);
- /* calc how many pages we need to insert between the vmlinux and the start of the ram disk */
- padPages = offset_end/4096 - roundedKernelPages;
-
- /* Check and see if the vmlinux is already larger than _end in System.map */
- if (padPages < 0) {
- /* vmlinux is larger than _end - adjust the offset to the start of the embedded ram disk */
- offset_end = roundedKernelLen;
- printf("vmlinux is larger than _end indicates it needs to be - offset_end = %lx \n", offset_end);
- padPages = 0;
- printf("will insert %lx pages between the vmlinux and the start of the ram disk \n", padPages);
- }
- else {
- /* _end is larger than vmlinux - use the offset to _end that we calculated from the system map */
- printf("vmlinux is smaller than _end indicates is needed - offset_end = %lx \n", offset_end);
- printf("will insert %lx pages between the vmlinux and the start of the ram disk \n", padPages);
- }
-
-
-
- /* Input Ram Disk file */
- // Set the offset that the ram disk will be started at.
- ramStartOffs = offset_end; /* determined from the input vmlinux file and the system map */
- printf("Ram Disk will start at offset = 0x%lx \n", ramStartOffs);
-
- fseek(ramDisk, 0, SEEK_END);
- ramFileLen = ftell(ramDisk);
- fseek(ramDisk, 0, SEEK_SET);
- printf("%s file size = %ld/0x%lx \n", argv[1], ramFileLen, ramFileLen);
-
- ramLen = ramFileLen;
-
- roundR = 4096 - (ramLen % 4096);
- if ( roundR ) {
- printf("Rounding RAM disk file up to a multiple of 4096, adding %ld/0x%lx \n", roundR, roundR);
- ramLen += roundR;
- }
-
- printf("Rounded RAM disk size is %ld/0x%lx \n", ramLen, ramLen);
- ramPages = ramLen / 4096;
- printf("RAM disk pages to copy = %ld/0x%lx\n", ramPages, ramPages);
-
-
-
- // Copy 64K ELF header
- for (i=0; i<(ElfPages); ++i) {
- get4k( inputVmlinux, inbuf );
- put4k( outputVmlinux, inbuf );
- }
-
- /* Copy the vmlinux (as full pages). */
- fseek(inputVmlinux, ElfHeaderSize, SEEK_SET);
- for ( i=0; i<roundedKernelPages; ++i ) {
- get4k( inputVmlinux, inbuf );
- put4k( outputVmlinux, inbuf );
- }
-
- /* Insert pad pages (if appropriate) that are needed between */
- /* | the end of the vmlinux and the ram disk. */
- for (i=0; i<padPages; ++i) {
- memset(inbuf, 0, 4096);
- put4k(outputVmlinux, inbuf);
- }
-
- /* Copy the ram disk (as full pages). */
- for ( i=0; i<ramPages; ++i ) {
- get4k( ramDisk, inbuf );
- put4k( outputVmlinux, inbuf );
- }
-
- /* Close the input files */
- fclose(ramDisk);
- fclose(inputVmlinux);
- /* And flush the written output file */
- fflush(outputVmlinux);
-
-
-
- /* Fixup the new vmlinux to contain the ram disk starting offset (xRamDisk) and the ram disk size (xRamDiskSize) */
- /* fseek to the hvReleaseData pointer */
- fseek(outputVmlinux, ElfHeaderSize + 0x24, SEEK_SET);
- if (fread(&hvReleaseData, 4, 1, outputVmlinux) != 1) {
- death("Could not read hvReleaseData pointer\n", outputVmlinux, argv[4]);
- }
- hvReleaseData = ntohl(hvReleaseData); /* Convert to native int */
- printf("hvReleaseData is at %08x\n", hvReleaseData);
-
- /* fseek to the hvReleaseData */
- fseek(outputVmlinux, ElfHeaderSize + hvReleaseData, SEEK_SET);
- if (fread(inbuf, 0x40, 1, outputVmlinux) != 1) {
- death("Could not read hvReleaseData\n", outputVmlinux, argv[4]);
- }
- /* Check hvReleaseData sanity */
- if (memcmp(inbuf, &eyeCatcher, 4) != 0) {
- death("hvReleaseData is invalid\n", outputVmlinux, argv[4]);
- }
- /* Get the naca pointer */
- naca = ntohl(*((u_int32_t*) &inbuf[0x0C])) - KERNELBASE;
- printf("Naca is at offset 0x%lx \n", naca);
-
- /* fseek to the naca */
- fseek(outputVmlinux, ElfHeaderSize + naca, SEEK_SET);
- if (fread(inbuf, 0x18, 1, outputVmlinux) != 1) {
- death("Could not read naca\n", outputVmlinux, argv[4]);
- }
- xRamDisk = ntohl(*((u_int32_t *) &inbuf[0x0c]));
- xRamDiskSize = ntohl(*((u_int32_t *) &inbuf[0x14]));
- /* Make sure a RAM disk isn't already present */
- if ((xRamDisk != 0) || (xRamDiskSize != 0)) {
- death("RAM disk is already attached to this kernel\n", outputVmlinux, argv[4]);
- }
- /* Fill in the values */
- *((u_int32_t *) &inbuf[0x0c]) = htonl(ramStartOffs);
- *((u_int32_t *) &inbuf[0x14]) = htonl(ramPages);
-
- /* Write out the new naca */
- fflush(outputVmlinux);
- fseek(outputVmlinux, ElfHeaderSize + naca, SEEK_SET);
- if (fwrite(inbuf, 0x18, 1, outputVmlinux) != 1) {
- death("Could not write naca\n", outputVmlinux, argv[4]);
- }
- printf("Ram Disk of 0x%lx pages is attached to the kernel at offset 0x%08x\n",
- ramPages, ramStartOffs);
-
- /* Done */
- fclose(outputVmlinux);
- /* Set permission to executable */
- chmod(argv[4], S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH);
-
- return 0;
-}
-
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