powerpc/boot: Remove addRamdisk.c since it is now unused

$(obj)/wrapper.a: $(obj-wlib) FORCE

	$(call if_changed,bootar)

hostprogs-y	:= addnote addRamDisk hack-coff mktree

hostprogs-y	:= addnote hack-coff mktree

targets		+= $(patsubst $(obj)/%,%,$(obj-boot) wrapper.a)

extra-y		:= $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \

#include <stdio.h>

#include <stdlib.h>

#include <netinet/in.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <string.h>

#include <elf.h>

#define ElfHeaderSize  (64 * 1024)

#define ElfPages  (ElfHeaderSize / 4096)

#define KERNELBASE (0xc000000000000000)

#define _ALIGN_UP(addr,size)	(((addr)+((size)-1))&(~((size)-1)))

struct addr_range {

	unsigned long long addr;

	unsigned long memsize;

	unsigned long offset;

};

static int check_elf64(void *p, int size, struct addr_range *r)

{

	Elf64_Ehdr *elf64 = p;

	Elf64_Phdr *elf64ph;

	if (elf64->e_ident[EI_MAG0] != ELFMAG0 ||

	    elf64->e_ident[EI_MAG1] != ELFMAG1 ||

	    elf64->e_ident[EI_MAG2] != ELFMAG2 ||

	    elf64->e_ident[EI_MAG3] != ELFMAG3 ||

	    elf64->e_ident[EI_CLASS] != ELFCLASS64 ||

	    elf64->e_ident[EI_DATA] != ELFDATA2MSB ||

	    elf64->e_type != ET_EXEC || elf64->e_machine != EM_PPC64)

		return 0;

	if ((elf64->e_phoff + sizeof(Elf64_Phdr)) > size)

		return 0;

	elf64ph = (Elf64_Phdr *) ((unsigned long)elf64 +

				  (unsigned long)elf64->e_phoff);

	r->memsize = (unsigned long)elf64ph->p_memsz;

	r->offset = (unsigned long)elf64ph->p_offset;

	r->addr = (unsigned long long)elf64ph->p_vaddr;

#ifdef DEBUG

	printf("PPC64 ELF file, ph:\n");

	printf("p_type   0x%08x\n", elf64ph->p_type);

	printf("p_flags  0x%08x\n", elf64ph->p_flags);

	printf("p_offset 0x%016llx\n", elf64ph->p_offset);

	printf("p_vaddr  0x%016llx\n", elf64ph->p_vaddr);

	printf("p_paddr  0x%016llx\n", elf64ph->p_paddr);

	printf("p_filesz 0x%016llx\n", elf64ph->p_filesz);

	printf("p_memsz  0x%016llx\n", elf64ph->p_memsz);

	printf("p_align  0x%016llx\n", elf64ph->p_align);

	printf("... skipping 0x%08lx bytes of ELF header\n",

	       (unsigned long)elf64ph->p_offset);

#endif

	return 64;

}

static void get4k(FILE *file, char *buf )

{

	unsigned j;

	unsigned num = fread(buf, 1, 4096, file);

	for ( j=num; j<4096; ++j )

		buf[j] = 0;

}

static void put4k(FILE *file, char *buf )

{

	fwrite(buf, 1, 4096, file);

}

static 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];

	struct addr_range vmlinux;

	FILE *ramDisk;

	FILE *inputVmlinux;

	FILE *outputVmlinux;

	char *rd_name, *lx_name, *out_name;

	size_t i;

	unsigned long ramFileLen;

	unsigned long ramLen;

	unsigned long roundR;

	unsigned long offset_end;

	unsigned long kernelLen;

	unsigned long actualKernelLen;

	unsigned long round;

	unsigned long roundedKernelLen;

	unsigned long ramStartOffs;

	unsigned long ramPages;

	unsigned long roundedKernelPages;

	unsigned long hvReleaseData;

	u_int32_t eyeCatcher = 0xc8a5d9c4;

	unsigned long naca;

	unsigned long xRamDisk;

	unsigned long xRamDiskSize;

	long padPages;

	if (argc < 2) {

		fprintf(stderr, "Name of RAM disk file missing.\n");

		exit(1);

	}

	rd_name = argv[1];

	if (argc < 3) {

		fprintf(stderr, "Name of vmlinux file missing.\n");

		exit(1);

	}

	lx_name = argv[2];

	if (argc < 4) {

		fprintf(stderr, "Name of vmlinux output file missing.\n");

		exit(1);

	}

	out_name = argv[3];

	ramDisk = fopen(rd_name, "r");

	if ( ! ramDisk ) {

		fprintf(stderr, "RAM disk file \"%s\" failed to open.\n", rd_name);

		exit(1);

	}

	inputVmlinux = fopen(lx_name, "r");

	if ( ! inputVmlinux ) {

		fprintf(stderr, "vmlinux file \"%s\" failed to open.\n", lx_name);

		exit(1);

	}

	outputVmlinux = fopen(out_name, "w+");

	if ( ! outputVmlinux ) {

		fprintf(stderr, "output vmlinux file \"%s\" failed to open.\n", out_name);

		exit(1);

	}

	i = fread(inbuf, 1, sizeof(inbuf), inputVmlinux);

	if (i != sizeof(inbuf)) {

		fprintf(stderr, "can not read vmlinux file %s: %u\n", lx_name, i);

		exit(1);

	}

	i = check_elf64(inbuf, sizeof(inbuf), &vmlinux);

	if (i == 0) {

		fprintf(stderr, "You must have a linux kernel specified as argv[2]\n");

		exit(1);

	}

	/* Input Vmlinux file */

	fseek(inputVmlinux, 0, SEEK_END);

	kernelLen = ftell(inputVmlinux);

	fseek(inputVmlinux, 0, SEEK_SET);

	printf("kernel file size = %lu\n", kernelLen);

	actualKernelLen = kernelLen - ElfHeaderSize;

	printf("actual kernel length (minus ELF header) = %lu\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);

	offset_end = _ALIGN_UP(vmlinux.memsize, 4096);

	/* 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", rd_name, 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, out_name);

	}

	hvReleaseData = ntohl(hvReleaseData); /* Convert to native int */

	printf("hvReleaseData is at %08lx\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, out_name);

	}

	/* Check hvReleaseData sanity */

	if (memcmp(inbuf, &eyeCatcher, 4) != 0) {

		death("hvReleaseData is invalid\n", outputVmlinux, out_name);

	}

	/* 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, out_name);

	}

	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, out_name);

	}

	/* 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, out_name);

	}

	printf("Ram Disk of 0x%lx pages is attached to the kernel at offset 0x%08lx\n",

	       ramPages, ramStartOffs);

	/* Done */

	fclose(outputVmlinux);

	/* Set permission to executable */

	chmod(out_name, S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH);

	return 0;

}