diff options
Diffstat (limited to 'arch/ppc/treeboot')
| -rw-r--r-- | arch/ppc/treeboot/Makefile | 62 | ||||
| -rw-r--r-- | arch/ppc/treeboot/crt0.S | 70 | ||||
| -rw-r--r-- | arch/ppc/treeboot/elf.pl | 33 | ||||
| -rw-r--r-- | arch/ppc/treeboot/irSect.c | 36 | ||||
| -rw-r--r-- | arch/ppc/treeboot/irSect.h | 32 | ||||
| -rw-r--r-- | arch/ppc/treeboot/ld.script | 68 | ||||
| -rw-r--r-- | arch/ppc/treeboot/main.c | 209 | ||||
| -rw-r--r-- | arch/ppc/treeboot/misc.S | 28 | ||||
| -rw-r--r-- | arch/ppc/treeboot/mkevimg | 437 | ||||
| -rw-r--r-- | arch/ppc/treeboot/mkirimg | 367 |
10 files changed, 1342 insertions, 0 deletions
diff --git a/arch/ppc/treeboot/Makefile b/arch/ppc/treeboot/Makefile new file mode 100644 index 000000000..405634214 --- /dev/null +++ b/arch/ppc/treeboot/Makefile @@ -0,0 +1,62 @@ +# +# Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu> +# +# Module name: Makefile +# +# Description: +# Makefile for the IBM "tree" evaluation board Linux kernel +# boot loaders. +# + +HOSTCFLAGS = -O -I$(TOPDIR)/include + +CC = $(CROSS_COMPILE)gcc +LD = $(CROSS_COMPILE)ld +OBJCOPY = $(CROSS_COMPILE)objcopy +OBJDUMP = $(CROSS_COMPILE)objdump + +GZIP = gzip -vf9 +RM = rm -f +MKEVIMG = mkevimg -l +MKIRIMG = mkirimg + +CFLAGS = -O -fno-builtin -I$(TOPDIR)/include +LD_ARGS = -e _start -T ld.script -Ttext 80200000 -Bstatic + +OBJS = crt0.o main.o misc.o string.o zlib.o irSect.o +LIBS = + +treeboot: $(OBJS) ld.script + $(LD) -o $@ $(LD_ARGS) $(OBJS) $(LIBS) + +zImage: vmlinux.img + +zImage.initrd: vmlinux.initrd.img + +treeboot.image: treeboot vmlinux.gz + $(OBJCOPY) --add-section=image=vmlinux.gz treeboot $@ + +treeboot.initrd: treeboot.image ramdisk.image.gz + $(OBJCOPY) --add-section=initrd=ramdisk.image.gz treeboot.image $@ + +vmlinux.img: treeboot.image + $(OBJDUMP) --syms treeboot.image | grep irSectStart > irSectStart.txt + $(MKIRIMG) treeboot.image treeboot.image.out irSectStart.txt + $(MKEVIMG) treeboot.image.out $@ + $(RM) treeboot.image treeboot.image.out irSectStart.txt + +vmlinux.initrd.img: treeboot.initrd + $(OBJDUMP) --all-headers treeboot.initrd | grep irSectStart > irSectStart.txt + $(MKIRIMG) treeboot.initrd treeboot.initrd.out irSectStart.txt + $(MKEVIMG) treeboot.initrd.out $@ + $(RM) treeboot.initrd treeboot.initrd.out irSectStart.txt + +vmlinux.gz: $(TOPDIR)/vmlinux + $(OBJCOPY) -S -O binary $(TOPDIR)/vmlinux vmlinux + $(GZIP) vmlinux + +clean: + rm -f treeboot treeboot.image treeboot.initrd irSectStart.txt vmlinux.* *.o + +fastdep: + diff --git a/arch/ppc/treeboot/crt0.S b/arch/ppc/treeboot/crt0.S new file mode 100644 index 000000000..1f2c1c094 --- /dev/null +++ b/arch/ppc/treeboot/crt0.S @@ -0,0 +1,70 @@ +/* + * Copyright (c) 1997 Paul Mackerras <paulus@cs.anu.edu.au> + * Initial Power Macintosh COFF version. + * Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu> + * Modifications for IBM PowerPC 400-class processor evaluation + * boards. + * + * Module name: crt0.S + * + * Description: + * Boot loader execution entry point. Clears out .bss section as per + * ANSI C requirements. Invalidates and flushes the caches over the + * range covered by the boot loader's .text section. Sets up a stack + * below the .text section entry point. + * + * 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. + * + */ + +#include "../kernel/ppc_asm.h" + + .text + + .globl _start +_start: + ## Clear out the BSS as per ANSI C requirements + + lis r7,_end@ha # + addi r7,r7,_end@l # r7 = &_end + lis r8,__bss_start@ha # + addi r8,r8,__bss_start@l # r8 = &_bss_start + + ## Determine how large an area, in number of words, to clear + + subf r7,r8,r7 # r7 = &_end - &_bss_start + 1 + addi r7,r7,3 # r7 += 3 + srwi. r7,r7,2 # r7 = size in words. + beq 2f # If the size is zero, do not bother + addi r8,r8,-4 # r8 -= 4 + mtctr r7 # SPRN_CTR = number of words to clear + li r0,0 # r0 = 0 +1: stwu r0,4(r8) # Clear out a word + bdnz 1b # If we are not done yet, keep clearing + + ## Flush and invalidate the caches for the range in memory covering + ## the .text section of the boot loader + +2: lis r9,_start@h # r9 = &_start + lis r8,_etext@ha # + addi r8,r8,_etext@l # r8 = &_etext +3: dcbf r0,r9 # Flush the data cache + icbi r0,r9 # Invalidate the instruction cache + addi r9,r9,0x10 # Increment by one cache line + cmplwi cr0,r9,r8 # Are we at the end yet? + blt 3b # No, keep flushing and invalidating + + ## Set up the stack + + lis r9,_start@h # r9 = &_start (text section entry) + addi r9,r9,_start@l + subi r1,r9,64 # Start the stack 64 bytes below _start + clrrwi r1,r1,4 # Make sure it is aligned on 16 bytes. + li r0,0 + stwu r0,-16(r1) + mtlr r9 + + b start # All done, start the real work. diff --git a/arch/ppc/treeboot/elf.pl b/arch/ppc/treeboot/elf.pl new file mode 100644 index 000000000..d3e9d9d5b --- /dev/null +++ b/arch/ppc/treeboot/elf.pl @@ -0,0 +1,33 @@ +# +# ELF header field numbers +# + +$e_ident = 0; # Identification bytes / magic number +$e_type = 1; # ELF file type +$e_machine = 2; # Target machine type +$e_version = 3; # File version +$e_entry = 4; # Start address +$e_phoff = 5; # Program header file offset +$e_shoff = 6; # Section header file offset +$e_flags = 7; # File flags +$e_ehsize = 8; # Size of ELF header +$e_phentsize = 9; # Size of program header +$e_phnum = 10; # Number of program header entries +$e_shentsize = 11; # Size of section header +$e_shnum = 12; # Number of section header entries +$e_shstrndx = 13; # Section header table string index + +# +# Section header field numbers +# + +$sh_name = 0; # Section name +$sh_type = 1; # Section header type +$sh_flags = 2; # Section header flags +$sh_addr = 3; # Virtual address +$sh_offset = 4; # File offset +$sh_size = 5; # Section size +$sh_link = 6; # Miscellaneous info +$sh_info = 7; # More miscellaneous info +$sh_addralign = 8; # Memory alignment +$sh_entsize = 9; # Entry size if this is a table diff --git a/arch/ppc/treeboot/irSect.c b/arch/ppc/treeboot/irSect.c new file mode 100644 index 000000000..7f4c7f6ab --- /dev/null +++ b/arch/ppc/treeboot/irSect.c @@ -0,0 +1,36 @@ +/* + * + * Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu> + * + * Module name: irSect.c + * + * Description: + * Defines variables to hold the absolute starting address and size + * of the Linux kernel "image" and the initial RAM disk "initrd" + * sections within the boot loader. + * + */ + +#include "irSect.h" + + +/* + * The order of globals below must not change. If more globals are added, + * you must change the script 'mkirimg' accordingly. + * + */ + +/* + * irSectStart must be at beginning of file + */ +unsigned int irSectStart = 0xdeadbeaf; + +unsigned int imageSect_start = 0; +unsigned int imageSect_size = 0; +unsigned int initrdSect_start = 0; +unsigned int initrdSect_size = 0; + +/* + * irSectEnd must be at end of file + */ +unsigned int irSectEnd = 0xdeadbeaf; diff --git a/arch/ppc/treeboot/irSect.h b/arch/ppc/treeboot/irSect.h new file mode 100644 index 000000000..801c3b42e --- /dev/null +++ b/arch/ppc/treeboot/irSect.h @@ -0,0 +1,32 @@ +/* + * + * Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu> + * + * Module name: irSect.h + * + * Description: + * Defines variables to hold the absolute starting address and size + * of the Linux kernel "image" and the initial RAM disk "initrd" + * sections within the boot loader. + * + */ + +#ifndef __IRSECT_H__ +#define __IRSECT_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +extern unsigned int imageSect_start; +extern unsigned int imageSect_size; + +extern unsigned int initrdSect_start; +extern unsigned int initrdSect_size; + + +#ifdef __cplusplus +} +#endif + +#endif /* __IRSECT_H__ */ diff --git a/arch/ppc/treeboot/ld.script b/arch/ppc/treeboot/ld.script new file mode 100644 index 000000000..2469ed65d --- /dev/null +++ b/arch/ppc/treeboot/ld.script @@ -0,0 +1,68 @@ +OUTPUT_ARCH(powerpc) +SEARCH_DIR(/lib); SEARCH_DIR(/usr/lib); SEARCH_DIR(/usr/local/lib); SEARCH_DIR(/usr/local/powerpc-any-elf/lib); +/* Do we need any of these for elf? + __DYNAMIC = 0; */ +SECTIONS +{ + /* Read-only sections, merged into text segment: */ + . = + SIZEOF_HEADERS; + .interp : { *(.interp) } + .hash : { *(.hash) } + .dynsym : { *(.dynsym) } + .dynstr : { *(.dynstr) } + .rel.text : { *(.rel.text) } + .rela.text : { *(.rela.text) } + .rel.data : { *(.rel.data) } + .rela.data : { *(.rela.data) } + .rel.rodata : { *(.rel.rodata) } + .rela.rodata : { *(.rela.rodata) } + .rel.got : { *(.rel.got) } + .rela.got : { *(.rela.got) } + .rel.ctors : { *(.rel.ctors) } + .rela.ctors : { *(.rela.ctors) } + .rel.dtors : { *(.rel.dtors) } + .rela.dtors : { *(.rela.dtors) } + .rel.bss : { *(.rel.bss) } + .rela.bss : { *(.rela.bss) } + .rel.plt : { *(.rel.plt) } + .rela.plt : { *(.rela.plt) } + .init : { *(.init) } =0 + .plt : { *(.plt) } + .text : + { + *(.text) + *(.rodata) + *(.rodata1) + *(.got1) + } + .fini : { *(.fini) } =0 + .ctors : { *(.ctors) } + .dtors : { *(.dtors) } + _etext = .; + PROVIDE (etext = .); + /* Read-write section, merged into data segment: */ + . = (. + 0x0FFF) & 0xFFFFF000; + .data : + { + *(.data) + *(.data1) + *(.sdata) + *(.sdata2) + *(.got.plt) *(.got) + *(.dynamic) + CONSTRUCTORS + } + _edata = .; + PROVIDE (edata = .); + __bss_start = .; + .bss : + { + *(.sbss) *(.scommon) + *(.dynbss) + *(.bss) + *(COMMON) + } + _end = . ; + PROVIDE (end = .); +} + diff --git a/arch/ppc/treeboot/main.c b/arch/ppc/treeboot/main.c new file mode 100644 index 000000000..1b5ef3805 --- /dev/null +++ b/arch/ppc/treeboot/main.c @@ -0,0 +1,209 @@ +/* + * Copyright (c) 1997 Paul Mackerras <paulus@cs.anu.edu.au> + * Initial Power Macintosh COFF version. + * Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu> + * Modifications for an ELF-based IBM evaluation board version. + * + * Module name: main.c + * + * Description: + * This module does most of the real work for the boot loader. It + * checks the variables holding the absolute start address and size + * of the Linux kernel "image" and initial RAM disk "initrd" sections + * and if they are present, moves them to their "proper" locations. + * + * For the Linux kernel, "proper" is physical address 0x00000000. + * For the RAM disk, "proper" is the image's size below the top + * of physical memory. The Linux kernel may be in either raw + * binary form or compressed with GNU zip (aka gzip). + * + * 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. + * + */ + +#include "nonstdio.h" +#include "zlib.h" +#include "irSect.h" + + +/* Preprocessor Defines */ + +#define RAM_SIZE (4 * 1024 * 1024) + +#define RAM_PBASE 0x00000000 +#define RAM_PEND (RAM_PBASE + RAM_SIZE) + +#define RAM_VBASE 0xC0000000 +#define RAM_VEND (RAM_VBASE + RAM_SIZE) + +#define RAM_START RAM_PBASE +#define RAM_END RAM_PEND +#define RAM_FREE (imageSect_start + imageSect_size + initrdSect_size) + +#define PROG_START RAM_START + + +/* Function Macros */ + +#define ALIGN_UP(x, align) (((x) + ((align) - 1)) & ~((align) - 1)) + + +/* Global Variables */ + +/* Needed by zalloc and zfree for allocating memory */ + +char *avail_ram; /* Indicates start of RAM available for heap */ +char *end_avail; /* Indicates end of RAM available for heap */ + + +/* Function Prototypes */ + +void *zalloc(void *x, unsigned items, unsigned size); +void zfree(void *x, void *addr, unsigned nb); + +void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp); + +void printf () {} +void pause () {} +void exit () {} + + +void start(void) +{ + void *options; + int ns, oh, i; + unsigned sa, len; + void *dst; + unsigned char *im; + unsigned initrd_start, initrd_size; + + /* setup_bats(RAM_START); */ + + /* Init RAM disk (initrd) section */ + + if (initrdSect_start != 0 && (initrd_size = initrdSect_size) != 0) { + initrd_start = (RAM_END - initrd_size) & ~0xFFF; + + printf("Initial RAM disk at 0x%08x (%u bytes)\n", + initrd_start, initrd_size); + + memcpy((char *)initrd_start, + (char *)(initrdSect_start), + initrdSect_size); + + end_avail = (char *)initrd_start; + } else { + end_avail = (char *)RAM_END; + } + + /* Linux kernel image section */ + + im = (unsigned char *)(imageSect_start); + len = imageSect_size; + dst = (void *)PROG_START; + + /* Check for the gzip archive magic numbers */ + + if (im[0] == 0x1f && im[1] == 0x8b) { + + /* The gunzip routine needs everything nice and aligned */ + + void *cp = (void *)ALIGN_UP(RAM_FREE, 8); + avail_ram = (void *)(cp + ALIGN_UP(len, 8)); + memcpy(cp, im, len); + + /* I'm not sure what the 0x200000 parameter is for, but it works. */ + + gunzip(dst, 0x200000, cp, &len); + } else { + memmove(dst, im, len); + } + + /* flush_cache(dst, len); */ + + sa = (unsigned long)dst; + + (*(void (*)())sa)(); + + pause(); +} + +void *zalloc(void *x, unsigned items, unsigned size) +{ + void *p = avail_ram; + + size *= items; + size = ALIGN_UP(size, 8); + avail_ram += size; + if (avail_ram > end_avail) { + printf("oops... out of memory\n"); + pause(); + } + return p; +} + +void zfree(void *x, void *addr, unsigned nb) +{ + +} + +#define HEAD_CRC 2 +#define EXTRA_FIELD 4 +#define ORIG_NAME 8 +#define COMMENT 0x10 +#define RESERVED 0xe0 + +#define DEFLATED 8 + +void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp) +{ + z_stream s; + int r, i, flags; + + /* skip header */ + i = 10; + flags = src[3]; + if (src[2] != DEFLATED || (flags & RESERVED) != 0) { + printf("bad gzipped data\n"); + exit(); + } + if ((flags & EXTRA_FIELD) != 0) + i = 12 + src[10] + (src[11] << 8); + if ((flags & ORIG_NAME) != 0) + while (src[i++] != 0) + ; + if ((flags & COMMENT) != 0) + while (src[i++] != 0) + ; + if ((flags & HEAD_CRC) != 0) + i += 2; + if (i >= *lenp) { + printf("gunzip: ran out of data in header\n"); + exit(); + } + printf("done 1\n"); + s.zalloc = zalloc; + s.zfree = zfree; + r = inflateInit2(&s, -MAX_WBITS); + if (r != Z_OK) { + printf("inflateInit2 returned %d\n", r); + exit(); + } + s.next_in = src + i; + s.avail_in = *lenp - i; + s.next_out = dst; + s.avail_out = dstlen; + printf("doing inflate\n"); + r = inflate(&s, Z_FINISH); + printf("done inflate\n"); + if (r != Z_OK && r != Z_STREAM_END) { + printf("inflate returned %d\n", r); + exit(); + } + *lenp = s.next_out - (unsigned char *) dst; + printf("doing end\n"); + inflateEnd(&s); +} diff --git a/arch/ppc/treeboot/misc.S b/arch/ppc/treeboot/misc.S new file mode 100644 index 000000000..27417563f --- /dev/null +++ b/arch/ppc/treeboot/misc.S @@ -0,0 +1,28 @@ +/* + * Copyright (C) Paul Mackerras 1997. + * + * 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. + */ + .text + +/* + * Flush the dcache and invalidate the icache for a range of addresses. + * + * flush_cache(addr, len) + */ + .global flush_cache +flush_cache: + addi 4,4,0x1f /* len = (len + 0x1f) / 0x20 */ + rlwinm. 4,4,27,5,31 + mtctr 4 + beqlr +1: dcbf 0,3 + icbi 0,3 + addi 3,3,0x20 + bdnz 1b + sync + isync + blr diff --git a/arch/ppc/treeboot/mkevimg b/arch/ppc/treeboot/mkevimg new file mode 100644 index 000000000..76f849bb7 --- /dev/null +++ b/arch/ppc/treeboot/mkevimg @@ -0,0 +1,437 @@ +#!/usr/local/bin/perl + +# +# Copyright (c) 1998-1999 TiVo, Inc. +# All rights reserved. +# +# Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu> +# Major syntactic and usability rework. +# +# Module name: mkevimg +# +# Description: +# Converts an ELF output file from the linker into the format used by +# the IBM evaluation board ROM Monitor to load programs from a host +# onto the evaluation board. The ELF file must be an otherwise execut- +# able file (with the text and data addresses bound at link time) and +# have space reserved after the entry point for the load information +# block: +# +# typedef struct boot_block { +# unsigned long magic; 0x0052504F +# unsigned long dest; Target address of the image +# unsigned long num_512blocks; Size, rounded-up, in 512 byte blocks +# unsigned long debug_flag; Run the debugger or image after load +# unsigned long entry_point; The image address to jump to after load +# unsigned long reserved[3]; +# } boot_block_t; +# +# + +use File::Basename; +use Getopt::Std; + +# +# usage() +# +# Description: +# This routine prints out the proper command line usage for this program +# +# Input(s): +# status - Flag determining what usage information will be printed and what +# the exit status of the program will be after the information is +# printed. +# +# Output(s): +# N/A +# +# Returns: +# This subroutine does not return. +# + +sub usage { + my($status); + $status = $_[0]; + + printf("Usage: %s [-hlvV] <ELF input file> <Evaluation board output file>\n", + $program); + + if ($status != 0) { + printf("Try `%s -h' for more information.\n", $program); + } + + if ($status != 1) { + print(" -h Print out this message and exit.\n"); + print(" -l Linux mode; if present, copy 'image' and 'initrd' sections.\n"); + print(" -v Verbose. Print out lots of ELF information.\n"); + print(" -V Print out version information and exit.\n"); + } + + exit($status); +} + +# +# version() +# +# Description: +# This routine prints out program version information +# +# Input(s): +# N/A +# +# Output(s): +# N/A +# +# Returns: +# This subroutine does not return. +# + +sub version { + print("mkevimg Version 1.1.0\n"); + print("Copyright (c) 1998-1999 TiVo, Inc.\n"); + print("Copyright (c) 1999 Grant Erickson <grant\@lcse.umn.edu>\n"); + + exit (0); +} + +# +# file_check() +# +# Description: +# This routine checks an input file to ensure that it exists, is a +# regular file, and is readable. +# +# Input(s): +# file - Input file to be checked. +# +# Output(s): +# N/A +# +# Returns: +# 0 if the file exists, is a regular file, and is readable, otherwise -1. +# + +sub file_check { + my($file); + $file = $_[0]; + + if (!(-e $file)) { + printf("The file \"%s\" does not exist.\n", $file); + return (-1); + } elsif (!(-f $file)) { + printf("The file \"%s\" is not a regular file.\n", $file); + return (-1); + } elsif (!(-r $file)) { + printf("The file \"%s\" is not readable.\n", $file); + return (-1); + } + + return (0); +} + +# +# decode_options() +# +# Description: +# This routine steps through the command-line arguments, parsing out +# recognzied options. +# +# Input(s): +# N/A +# +# Output(s): +# N/A +# +# Returns: +# N/A +# + +sub decode_options { + + if (!getopts("hlvV")) { + usage(1); + } + + if ($opt_h) { + usage(0); + } + + if ($opt_l) { + $linux = 1; + } + + if ($opt_V) { + version(); + exit (0); + } + + if ($opt_v) { + $verbose = 1; + } + + if (!($ifile = shift(@ARGV))) { + usage(1); + } + + if (!($ofile = shift(@ARGV))) { + usage (1); + } + + if (file_check($ifile)) { + exit(1); + } + +} + +# +# ELF file and section header field numbers +# + +require 'elf.pl'; + +# +# Main program body +# + +{ + $program = basename($0); + + decode_options(); + + open(ELF, "<$ifile") || die "Cannot open input file"; + + $ifilesize = (-s $ifile); + + if ($verbose) { + print("Output file: $ofile\n"); + print("Input file: $ifile, $ifilesize bytes.\n"); + } + + if (read(ELF, $ibuf, $ifilesize) != $ifilesize) { + print("Failed to read input file!\n"); + exit(1); + } + + # + # Parse ELF header + # + + @eh = unpack("a16n2N5n6", $ibuf); + + # + # Make sure this is actually a PowerPC ELF file. + # + + if (substr($eh[$e_ident], 0, 4) ne "\177ELF") { + printf("The file \"%s\" is not an ELF file.\n", $ifile); + exit (1); + } elsif ($eh[$e_machine] != 20) { + printf("The file \"%s\" is not a PowerPC ELF file.\n", $ifile); + exit (1); + } + + if ($verbose) { + print("File header:\n"); + printf(" Identifier: %s\n", $eh[$e_ident]); + printf(" Type: %d\n", $eh[$e_type]); + printf(" Machine: %d\n", $eh[$e_machine]); + printf(" Version: %d\n", $eh[$e_version]); + printf(" Entry point: 0x%08x\n", $eh[$e_entry]); + printf(" Program header offset: 0x%x\n", $eh[$e_phoff]); + printf(" Section header offset: 0x%x\n", $eh[$e_shoff]); + printf(" Flags: 0x%08x\n", $eh[$e_flags]); + printf(" Header size: %d\n", $eh[$e_ehsize]); + printf(" Program entry size: %d\n", $eh[$e_phentsize]); + printf(" Program table entries: %d\n", $eh[$e_phnum]); + printf(" Section header size: %d\n", $eh[$e_shentsize]); + printf(" Section table entries: %d\n", $eh[$e_shnum]); + printf(" String table section: %d\n", $eh[$e_shstrndx]); + } + + # + # Find the section header for the string table. + # + + $strtable_section_offset = $eh[$e_shoff] + + $eh[$e_shstrndx] * $eh[$e_shentsize]; + + if ($verbose) { + printf("String table section header offset: 0x%x\n", + $strtable_section_offset); + } + + # + # Find the start of the string table. + # + + @strh = unpack("N10", substr($ibuf, $strtable_section_offset, + $eh[$e_shentsize])); + + if ($verbose) { + printf("Section name strings start at: 0x%x, %d bytes.\n", + $strh[$sh_offset], $strh[$sh_size]); + } + + $names = substr($ibuf, $strh[$sh_offset], $strh[$sh_size]); + + # Grab each section header and find '.text' and '.bss' sections in + # particular. + + if ($verbose) { + print("Section headers:\n"); + print("Idx Name Size Address File off Algn\n"); + print("--- ------------------------ -------- -------- -------- ----\n"); + } + + $off = $eh[$e_shoff]; + + for($i = 0; $i < $eh[$e_shnum]; $i++, $off += $eh[$e_shentsize]) { + @sh = unpack("N10", substr($ibuf, $off, $eh[$e_shentsize])); + + # Take the first section name from the array returned by split. + + ($name) = split(/\000/, substr($names, $sh[$sh_name])); + + if ($verbose) { + printf("%3d %-24s %8x %08x %08x %4d\n", + $i, $name, $sh[$sh_size], $sh[$sh_addr], + $sh[$sh_offset], $sh[$sh_addralign]); + } + + # Attempt to find the .text and .bss sections + + if ($name =~ /^\.bss$/) { + ($bss_addr, $bss_offset, $bss_size) = + ($sh[$sh_addr], $sh[$sh_offset], $sh[$sh_size]); + + } elsif ($name =~ /^\.text$/) { + ($text_addr, $text_offset, $text_size) = + ($sh[$sh_addr], $sh[$sh_offset], $sh[$sh_size]); + + } elsif ($linux && ($name =~ /^\image$/)) { + $image_found = 1; + + ($image_addr, $image_offset, $image_size) = + ($sh[$sh_addr], $sh[$sh_offset], $sh[$sh_size]); + + } elsif ($linux && ($name =~ /^\initrd$/)) { + $initrd_found = 1; + + ($initrd_addr, $initrd_offset, $initrd_size) = + ($sh[$sh_addr], $sh[$sh_offset], $sh[$sh_size]); + + } + } + + printf("Text section - Address: 0x%08x, Size: 0x%08x\n", + $text_addr, $text_size); + printf("Bss section - Address: 0x%08x, Size: 0x%08x\n", + $bss_addr, $bss_size); + + if ($linux) { + if ($image_found) { + printf("Image section - Address: 0x%08x, Size: 0x%08x\n", + $image_addr, $image_size); + } + + if ($initrd_found) { + printf("Initrd section - Address: 0x%08x, Size: 0x%08x\n", + $initrd_addr, $initrd_size); + } + } + + # + # Open output file + # + + open(BOOT, ">$ofile") || die "Cannot open output file"; + + # + # Compute image size + # + + $output_size = $bss_offset - $text_offset + $bss_size; + + if ($linux && $image_found) { + $output_size += $image_size; + } + + if ($linux && $initrd_found) { + $output_size += $initrd_size; + } + + $num_blocks = $output_size / 512 + 1; + + # + # Write IBM PowerPC evaluation board boot_block_t header + # + + $header = pack("H8N7", "0052504f", $text_addr, $num_blocks, 0, + $text_addr, 0, 0, 0); + + $bytes = length($header); + + if (($resid = syswrite(BOOT, $header, $bytes)) != $bytes) { + die("Could not write boot image header to output file."); + } + + printf("Entry point = 0x%08x\n", $text_addr); + printf("Image size = 0x%08x (%d bytes) (%d blocks).\n", + $output_size, $output_size, $num_blocks); + + # + # Write image starting after ELF and program headers and + # continuing to beginning of bss + # + + $bytes = $bss_offset - $text_offset + $bss_size; + + if (($resid = syswrite(BOOT, $ibuf, $bytes, $text_offset)) != $bytes) { + die("Could not write boot image to output file.\n"); + } + + # + # If configured, write out the image and initrd sections as well + # + + if ($linux) { + if ($image_found) { + $bytes = $image_size; + if (($resid = syswrite(BOOT, $ibuf, $bytes, $image_offset)) != $bytes) { + die("Could not write boot image to output file.\n"); + } + } + + if ($initrd_found) { + $bytes = $initrd_size; + if (($resid = syswrite(BOOT, $ibuf, $bytes, $initrd_offset)) != $bytes) { + die("Could not write boot image to output file.\n"); + } + } + } + + # + # Pad to a multiple of 512 bytes + # + + $pad_size = 512 - (length($header) + $output_size) % 512; + + if ($verbose) { + print("Padding boot image by an additional $pad_size bytes.\n"); + } + + $pad_string = pack(("H8","deadbeef") x 128); + + syswrite(BOOT, $pad_string, $pad_size) or + die "Could not pad boot image in output file.\n"; + + # + # Clean-up and leave + # + + close(BOOT); + + print("\nBoot image file \"$ofile\" built successfuly.\n\n"); + + exit(0); +} diff --git a/arch/ppc/treeboot/mkirimg b/arch/ppc/treeboot/mkirimg new file mode 100644 index 000000000..e8aa24e3d --- /dev/null +++ b/arch/ppc/treeboot/mkirimg @@ -0,0 +1,367 @@ +#!/usr/local/bin/perl +# +# Copyright (c) 1998-1999 TiVo, Inc. +# Original ELF parsing code. +# +# Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu> +# Original code from 'mkevimg'. +# +# Module name: mkirimg +# +# Description: +# Reads an ELF file and assigns global variables 'imageSect_start', +# 'imageSect_size', 'initrdSect_start', and 'initrdSect_size' from +# the "image" and "initrd" section header information. It then +# rewrites the input ELF file with assigned globals to an output +# file. +# +# An input file, "irSectStart.txt" has the memory address of +# 'irSectStart'. The irSectStart memory address is used to find +# the global variables in the ".data" section of the ELF file. +# The 'irSectStart' and the above global variables are defined +# in "irSect.c". +# +# + +use File::Basename; +use Getopt::Std; + +# +# usage() +# +# Description: +# This routine prints out the proper command line usage for this program +# +# Input(s): +# status - Flag determining what usage information will be printed and what +# the exit status of the program will be after the information is +# printed. +# +# Output(s): +# N/A +# +# Returns: +# This subroutine does not return. +# + +sub usage { + my($status); + $status = $_[0]; + + printf("Usage: %s [-hvV] <ELF input file> <Evaluation board output file> <irSectStart.txt file>\n", + $program); + + if ($status != 0) { + printf("Try `%s -h' for more information.\n", $program); + } + + if ($status != 1) { + print(" -h Print out this message and exit.\n"); + print(" -v Verbose. Print out lots of ELF information.\n"); + print(" -V Print out version information and exit.\n"); + } + + exit($status); +} + +# +# version() +# +# Description: +# This routine prints out program version information +# +# Input(s): +# N/A +# +# Output(s): +# N/A +# +# Returns: +# This subroutine does not return. +# + +sub version { + print("mkirimg Version 1.1.0\n"); + print("Copyright (c) 1998-1999 TiVo, Inc.\n"); + print("Copyright (c) 1999 Grant Erickson <grant\@lcse.umn.edu>\n"); + + exit (0); +} + +# +# file_check() +# +# Description: +# This routine checks an input file to ensure that it exists, is a +# regular file, and is readable. +# +# Input(s): +# file - Input file to be checked. +# +# Output(s): +# N/A +# +# Returns: +# 0 if the file exists, is a regular file, and is readable, otherwise -1. +# + +sub file_check { + my($file); + $file = $_[0]; + + if (!(-e $file)) { + printf("The file \"%s\" does not exist.\n", $file); + return (-1); + } elsif (!(-f $file)) { + printf("The file \"%s\" is not a regular file.\n", $file); + return (-1); + } elsif (!(-r $file)) { + printf("The file \"%s\" is not readable.\n", $file); + return (-1); + } + + return (0); +} + +# +# decode_options() +# +# Description: +# This routine steps through the command-line arguments, parsing out +# recognzied options. +# +# Input(s): +# N/A +# +# Output(s): +# N/A +# +# Returns: +# N/A +# + +sub decode_options { + + if (!getopts("hvV")) { + usage(1); + } + + if ($opt_h) { + usage(0); + } + + if ($opt_V) { + version(); + exit (0); + } + + if ($opt_v) { + $verbose = 1; + } + + if (!($ElfFile = shift(@ARGV))) { + usage(1); + } + + if (!($OutputFile = shift(@ARGV))) { + usage (1); + } + + if (!($IrFile = shift(@ARGV))) { + usage (1); + } + + if (file_check($ElfFile)) { + exit(1); + } + + if (file_check($IrFile)) { + exit(1); + } +} + +# +# ELF file and section header field numbers +# + +require 'elf.pl'; + +# +# Main program body +# + +{ + $program = basename($0); + decode_options(); + + open(ELF, "<$ElfFile") || die "Cannot open input file"; + open(OUTPUT, ">$OutputFile") || die "Cannot open output file"; + open(IR, "$IrFile") || die "Cannot open input file"; + + $ElfFilesize = (-s $ElfFile); + + if (read(ELF, $ibuf, $ElfFilesize) != $ElfFilesize) { + print("Failed to read ELF input file!\n"); + exit(1); + } + + if (read(IR, $irbuf, 8) != 8) { + print("Failed to read Ir input file!\n"); + exit(1); + } + + # + # Parse ELF header + # + + @eh = unpack("a16n2N5n6", $ibuf); + + # + # Make sure this is actually a PowerPC ELF file. + # + + if (substr($eh[$e_ident], 0, 4) ne "\177ELF") { + printf("The file \"%s\" is not an ELF file.\n", $ElfFile); + exit (1); + } elsif ($eh[$e_machine] != 20) { + printf("The file \"%s\" is not a PowerPC ELF file.\n", $ElfFile); + exit (1); + } + + # + # Find the section header for the string table. + # + + $strtable_section_offset = $eh[$e_shoff] + + + $eh[$e_shstrndx] * $eh[$e_shentsize]; + + if ($verbose) { + printf("String table section header offset: 0x%x\n", + $strtable_section_offset); + } + + # + # Find the start of the string table. + # + + @strh = unpack("N10", substr($ibuf, $strtable_section_offset, + $eh[$e_shentsize])); + + if ($verbose) { + printf("Section name strings start at: 0x%x, %d bytes.\n", + $strh[$sh_offset], $strh[$sh_size]); + } + + $names = substr($ibuf, $strh[$sh_offset], $strh[$sh_size]); + + # Grab each section header and find '.data', 'image', and + # 'initrd' sections in particular. + + $off = $eh[$e_shoff]; + $imageFound = 0; + $initrdFound = 0; + + for($i = 0; $i < $eh[$e_shnum]; $i++, $off += $eh[$e_shentsize]) { + @sh = unpack("N10", substr($ibuf, $off, $eh[$e_shentsize])); + + # Take the first section name from the array returned by split. + + ($name) = split(/\000/, substr($names, $sh[$sh_name])); + + # Attempt to find the .data, image, and initrd sections + + if ($name =~ /^\image$/) { + ($image_addr, $image_offset, $image_size) = + ($sh[$sh_addr], $sh[$sh_offset], $sh[$sh_size]); + $imageFound = 1; + + } elsif ($name =~ /^\initrd$/) { + ($initrd_addr, $initrd_offset, $initrd_size) = + ($sh[$sh_addr], $sh[$sh_offset], $sh[$sh_size]); + $initrdFound = 1; + + } elsif ($name =~ /^\.data$/) { + ($data_addr, $data_offset, $data_size) = + ($sh[$sh_addr], $sh[$sh_offset], $sh[$sh_size]); + + } elsif ($name =~ /^\.bss$/) { + ($bss_addr, $bss_offset, $bss_size) = + ($sh[$sh_addr], $sh[$sh_offset], $sh[$sh_size]); + + } + } + + if ($verbose) { + printf("Data section - Address: 0x%08x, Size: 0x%08x, File Offset 0x%08x\n", + $data_addr, $data_size, $data_offset); + printf("Bss section - Address: 0x%08x, Size: 0x%08x, File Offset 0x%08x\n", + $bss_addr, $bss_size, $bss_offset); + } + + if ($verbose) { + if ($imageFound) { + printf("Image section - Address: 0x%08x, Size: 0x%08x\n", + $image_addr, $image_size); + } else { + printf("Image section not found in file: $ElfFile\n"); + } + + if ($initrdFound) { + printf("Initrd section - Address: 0x%08x, Size: 0x%08x\n", + $initrd_addr, $initrd_size); + } else { + printf("Initrd section not found in file: $ElfFile\n"); + } + } + + # get file offset of irSectStart + + $irSectStartoffset = hex ($irbuf); + + if ($verbose) { + printf("irSectStartOffset Address: 0x%08x\n", $irSectStartoffset); + } + + # get the offset of global variables + + $initialOffset = ($irSectStartoffset - $data_addr) + $data_offset + 4; + + # write modified values to OUTPUT file + + syswrite(OUTPUT, $ibuf, $initialOffset); + + if ($imageFound) { + $testN = pack ("I2", $bss_addr + $bss_size, $image_size); + syswrite(OUTPUT, $testN, length($testN)); + printf("Updated symbol \"imageSect_start\" to 0x%08x\n", + $bss_addr + $bss_size); + printf("Updated symbol \"imageSect_size\" to 0x%08x\n", $image_size); + } else { + syswrite(OUTPUT, $ibuf, 8, $initialOffset); + } + + if ($initrdFound) { + $testN = pack ("I2", $bss_addr + $bss_size + $image_size, $initrd_size); + syswrite(OUTPUT, $testN, length($testN)); + printf("Updated symbol \"initrdSect_start\" to 0x%08x\n", + $bss_addr + $bss_size + $image_size); + printf("Updated symbol \"initrdSect_size\" to 0x%08x\n", $initrd_size); + } else { + syswrite(OUTPUT, $ibuf,8, $initialOffset + 8); + } + + syswrite(OUTPUT, $ibuf, $ElfFilesize - ($initialOffset + 16), + $initialOffset + 16); + + # + # Clean-up and leave + # + + close (ELF); + close (OUTPUT); + close (IR); + + exit (0); +} + |