773 lines
14 KiB
C
773 lines
14 KiB
C
/*-
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* Copyright (c) 1998 Robert Nordier
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* All rights reserved.
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* Copyright (c) 2001 Robert Drehmel
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are freely
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* permitted provided that the above copyright notice and this
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* paragraph and the following disclaimer are duplicated in all
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* such forms.
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*
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* This software is provided "AS IS" and without any express or
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* implied warranties, including, without limitation, the implied
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* warranties of merchantability and fitness for a particular
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* purpose.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/dirent.h>
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#include <machine/elf.h>
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#include <machine/stdarg.h>
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#define _PATH_LOADER "/boot/loader"
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#define _PATH_KERNEL "/boot/kernel/kernel"
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#define BSIZEMAX 16384
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typedef int putc_func_t(char c, void *arg);
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typedef int32_t ofwh_t;
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struct sp_data {
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char *sp_buf;
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u_int sp_len;
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u_int sp_size;
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};
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static const char digits[] = "0123456789abcdef";
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static char bootpath[128];
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static char bootargs[128];
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static ofwh_t bootdev;
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static struct fs fs;
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static ino_t inomap;
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static char blkbuf[BSIZEMAX];
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static unsigned int fsblks;
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static uint32_t fs_off;
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int main(int ac, char **av);
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static void exit(int) __dead2;
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static void load(const char *);
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static int dskread(void *, u_int64_t, int);
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static void usage(void);
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static void bcopy(const void *src, void *dst, size_t len);
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static void bzero(void *b, size_t len);
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static int mount(const char *device, int quiet);
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static void panic(const char *fmt, ...) __dead2;
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static int printf(const char *fmt, ...);
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static int putchar(char c, void *arg);
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static int vprintf(const char *fmt, va_list ap);
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static int vsnprintf(char *str, size_t sz, const char *fmt, va_list ap);
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static int __printf(const char *fmt, putc_func_t *putc, void *arg, va_list ap);
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static int __putc(char c, void *arg);
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static int __puts(const char *s, putc_func_t *putc, void *arg);
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static int __sputc(char c, void *arg);
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static char *__uitoa(char *buf, u_int val, int base);
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static char *__ultoa(char *buf, u_long val, int base);
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void __syncicache(void *, int);
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/*
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* Open Firmware interface functions
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*/
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typedef u_int32_t ofwcell_t;
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typedef u_int32_t u_ofwh_t;
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typedef int (*ofwfp_t)(void *);
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ofwfp_t ofw; /* the prom Open Firmware entry */
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ofwh_t chosenh;
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void ofw_init(void *, int, int (*)(void *), char *, int);
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static ofwh_t ofw_finddevice(const char *);
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static ofwh_t ofw_open(const char *);
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static int ofw_close(ofwh_t);
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static int ofw_getprop(ofwh_t, const char *, void *, size_t);
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static int ofw_setprop(ofwh_t, const char *, void *, size_t);
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static int ofw_read(ofwh_t, void *, size_t);
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static int ofw_write(ofwh_t, const void *, size_t);
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static int ofw_claim(void *virt, size_t len, u_int align);
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static int ofw_seek(ofwh_t, u_int64_t);
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static void ofw_exit(void) __dead2;
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ofwh_t bootdevh;
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ofwh_t stdinh, stdouth;
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__asm(" \n\
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.data \n\
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.align 4 \n\
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stack: \n\
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.space 16384 \n\
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\n\
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.text \n\
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.globl _start \n\
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_start: \n\
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lis %r1,stack@ha \n\
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addi %r1,%r1,stack@l \n\
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addi %r1,%r1,8192 \n\
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\n\
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b ofw_init \n\
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");
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void
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ofw_init(void *vpd, int res, int (*openfirm)(void *), char *arg, int argl)
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{
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char *av[16];
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char *p;
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int ac;
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ofw = openfirm;
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chosenh = ofw_finddevice("/chosen");
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ofw_getprop(chosenh, "stdin", &stdinh, sizeof(stdinh));
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ofw_getprop(chosenh, "stdout", &stdouth, sizeof(stdouth));
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ofw_getprop(chosenh, "bootargs", bootargs, sizeof(bootargs));
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ofw_getprop(chosenh, "bootpath", bootpath, sizeof(bootpath));
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bootargs[sizeof(bootargs) - 1] = '\0';
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bootpath[sizeof(bootpath) - 1] = '\0';
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p = bootpath;
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while (*p != '\0') {
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if (*p == ':') {
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*(++p) = '\0';
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break;
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}
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p++;
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}
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ac = 0;
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p = bootargs;
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for (;;) {
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while (*p == ' ' && *p != '\0')
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p++;
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if (*p == '\0' || ac >= 16)
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break;
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av[ac++] = p;
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while (*p != ' ' && *p != '\0')
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p++;
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if (*p != '\0')
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*p++ = '\0';
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}
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exit(main(ac, av));
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}
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static ofwh_t
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ofw_finddevice(const char *name)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"finddevice",
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1,
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1,
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(ofwcell_t)name,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_finddevice: name=\"%s\"\n", name);
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return (1);
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}
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return (args[4]);
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}
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static int
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ofw_getprop(ofwh_t ofwh, const char *name, void *buf, size_t len)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"getprop",
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4,
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1,
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(u_ofwh_t)ofwh,
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(ofwcell_t)name,
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(ofwcell_t)buf,
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len,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_getprop: ofwh=0x%x buf=%p len=%u\n",
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ofwh, buf, len);
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return (1);
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}
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return (0);
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}
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static int
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ofw_setprop(ofwh_t ofwh, const char *name, void *buf, size_t len)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"setprop",
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4,
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1,
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(u_ofwh_t)ofwh,
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(ofwcell_t)name,
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(ofwcell_t)buf,
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len,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_setprop: ofwh=0x%x buf=%p len=%u\n",
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ofwh, buf, len);
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return (1);
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}
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return (0);
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}
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static ofwh_t
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ofw_open(const char *path)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"open",
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1,
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1,
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(ofwcell_t)path,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_open: path=\"%s\"\n", path);
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return (-1);
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}
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return (args[4]);
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}
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static int
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ofw_close(ofwh_t devh)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"close",
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1,
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0,
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(u_ofwh_t)devh
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};
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if ((*ofw)(args)) {
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printf("ofw_close: devh=0x%x\n", devh);
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return (1);
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}
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return (0);
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}
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static int
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ofw_claim(void *virt, size_t len, u_int align)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"claim",
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3,
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1,
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(ofwcell_t)virt,
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len,
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align,
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0,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_claim: virt=%p len=%u\n", virt, len);
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return (1);
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}
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return (0);
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}
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static int
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ofw_read(ofwh_t devh, void *buf, size_t len)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"read",
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3,
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1,
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(u_ofwh_t)devh,
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(ofwcell_t)buf,
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len,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_read: devh=0x%x buf=%p len=%u\n", devh, buf, len);
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return (1);
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}
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return (0);
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}
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static int
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ofw_write(ofwh_t devh, const void *buf, size_t len)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"write",
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3,
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1,
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(u_ofwh_t)devh,
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(ofwcell_t)buf,
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len,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_write: devh=0x%x buf=%p len=%u\n", devh, buf, len);
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return (1);
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}
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return (0);
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}
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static int
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ofw_seek(ofwh_t devh, u_int64_t off)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"seek",
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3,
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1,
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(u_ofwh_t)devh,
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off >> 32,
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off,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_seek: devh=0x%x off=0x%lx\n", devh, off);
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return (1);
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}
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return (0);
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}
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static void
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ofw_exit(void)
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{
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ofwcell_t args[3];
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args[0] = (ofwcell_t)"exit";
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args[1] = 0;
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args[2] = 0;
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for (;;)
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(*ofw)(args);
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}
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static void
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bcopy(const void *src, void *dst, size_t len)
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{
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const char *s = src;
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char *d = dst;
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while (len-- != 0)
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*d++ = *s++;
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}
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static void
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memcpy(void *dst, const void *src, size_t len)
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{
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bcopy(src, dst, len);
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}
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static void
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bzero(void *b, size_t len)
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{
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char *p = b;
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while (len-- != 0)
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*p++ = 0;
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}
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static int
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strcmp(const char *s1, const char *s2)
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{
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for (; *s1 == *s2 && *s1; s1++, s2++)
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;
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return ((u_char)*s1 - (u_char)*s2);
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}
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#include "ufsread.c"
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int
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main(int ac, char **av)
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{
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const char *path;
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char bootpath_full[255];
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int i, len;
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path = _PATH_LOADER;
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for (i = 0; i < ac; i++) {
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switch (av[i][0]) {
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case '-':
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switch (av[i][1]) {
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default:
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usage();
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}
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break;
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default:
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path = av[i];
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break;
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}
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}
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printf(" \n>> FreeBSD/powerpc Open Firmware boot block\n"
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" Boot path: %s\n"
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" Boot loader: %s\n", bootpath, path);
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len = 0;
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while (bootpath[len] != '\0') len++;
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memcpy(bootpath_full,bootpath,len+1);
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if (bootpath_full[len-1] == ':') {
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for (i = 0; i < 16; i++) {
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if (i < 10) {
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bootpath_full[len] = i + '0';
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bootpath_full[len+1] = '\0';
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} else {
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bootpath_full[len] = '1';
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bootpath_full[len+1] = i - 10 + '0';
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bootpath_full[len+2] = '\0';
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}
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if (mount(bootpath_full,1) >= 0)
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break;
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if (bootdev > 0)
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ofw_close(bootdev);
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}
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if (i >= 16)
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panic("mount");
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} else {
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if (mount(bootpath_full,0) == -1)
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panic("mount");
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}
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printf(" Boot volume: %s\n",bootpath_full);
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ofw_setprop(chosenh, "bootargs", bootpath_full, len+2);
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load(path);
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return (1);
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}
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static void
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usage(void)
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{
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printf("usage: boot device [/path/to/loader]\n");
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exit(1);
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}
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static void
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exit(int code)
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{
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ofw_exit();
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}
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static struct dmadat __dmadat;
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static int
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mount(const char *device, int quiet)
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{
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dmadat = &__dmadat;
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if ((bootdev = ofw_open(device)) == -1) {
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printf("mount: can't open device\n");
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return (-1);
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}
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if (fsread(0, NULL, 0)) {
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if (!quiet)
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printf("mount: can't read superblock\n");
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return (-1);
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}
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return (0);
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}
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static void
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load(const char *fname)
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{
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Elf32_Ehdr eh;
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Elf32_Phdr ph;
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caddr_t p;
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ino_t ino;
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int i;
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if ((ino = lookup(fname)) == 0) {
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printf("File %s not found\n", fname);
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return;
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}
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if (fsread(ino, &eh, sizeof(eh)) != sizeof(eh)) {
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printf("Can't read elf header\n");
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return;
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}
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if (!IS_ELF(eh)) {
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printf("Not an ELF file\n");
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return;
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}
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for (i = 0; i < eh.e_phnum; i++) {
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fs_off = eh.e_phoff + i * eh.e_phentsize;
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if (fsread(ino, &ph, sizeof(ph)) != sizeof(ph)) {
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printf("Can't read program header %d\n", i);
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return;
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}
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if (ph.p_type != PT_LOAD)
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continue;
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fs_off = ph.p_offset;
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p = (caddr_t)ph.p_vaddr;
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ofw_claim(p,(ph.p_filesz > ph.p_memsz) ?
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ph.p_filesz : ph.p_memsz,0);
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if (fsread(ino, p, ph.p_filesz) != ph.p_filesz) {
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printf("Can't read content of section %d\n", i);
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return;
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}
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if (ph.p_filesz != ph.p_memsz)
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bzero(p + ph.p_filesz, ph.p_memsz - ph.p_filesz);
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__syncicache(p, ph.p_memsz);
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}
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ofw_close(bootdev);
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(*(void (*)(void *, int, ofwfp_t, char *, int))eh.e_entry)(NULL, 0,
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ofw,NULL,0);
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}
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static int
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dskread(void *buf, u_int64_t lba, int nblk)
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{
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/*
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* The Open Firmware should open the correct partition for us.
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* That means, if we read from offset zero on an open instance handle,
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* we should read from offset zero of that partition.
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*/
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ofw_seek(bootdev, lba * DEV_BSIZE);
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ofw_read(bootdev, buf, nblk * DEV_BSIZE);
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return (0);
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}
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static void
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panic(const char *fmt, ...)
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{
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char buf[128];
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va_list ap;
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va_start(ap, fmt);
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vsnprintf(buf, sizeof buf, fmt, ap);
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printf("panic: %s\n", buf);
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va_end(ap);
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exit(1);
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}
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static int
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printf(const char *fmt, ...)
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{
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va_list ap;
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int ret;
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/* Don't annoy the user as we probe for partitions */
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if (strcmp(fmt,"Not ufs\n") == 0)
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return 0;
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va_start(ap, fmt);
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ret = vprintf(fmt, ap);
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va_end(ap);
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
putchar(char c, void *arg)
|
|
{
|
|
char buf;
|
|
|
|
if (c == '\n') {
|
|
buf = '\r';
|
|
ofw_write(stdouth, &buf, 1);
|
|
}
|
|
buf = c;
|
|
ofw_write(stdouth, &buf, 1);
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
vprintf(const char *fmt, va_list ap)
|
|
{
|
|
int ret;
|
|
|
|
ret = __printf(fmt, putchar, 0, ap);
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
vsnprintf(char *str, size_t sz, const char *fmt, va_list ap)
|
|
{
|
|
struct sp_data sp;
|
|
int ret;
|
|
|
|
sp.sp_buf = str;
|
|
sp.sp_len = 0;
|
|
sp.sp_size = sz;
|
|
ret = __printf(fmt, __sputc, &sp, ap);
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
__printf(const char *fmt, putc_func_t *putc, void *arg, va_list ap)
|
|
{
|
|
char buf[(sizeof(long) * 8) + 1];
|
|
char *nbuf;
|
|
u_long ul;
|
|
u_int ui;
|
|
int lflag;
|
|
int sflag;
|
|
char *s;
|
|
int pad;
|
|
int ret;
|
|
int c;
|
|
|
|
nbuf = &buf[sizeof buf - 1];
|
|
ret = 0;
|
|
while ((c = *fmt++) != 0) {
|
|
if (c != '%') {
|
|
ret += putc(c, arg);
|
|
continue;
|
|
}
|
|
lflag = 0;
|
|
sflag = 0;
|
|
pad = 0;
|
|
reswitch: c = *fmt++;
|
|
switch (c) {
|
|
case '#':
|
|
sflag = 1;
|
|
goto reswitch;
|
|
case '%':
|
|
ret += putc('%', arg);
|
|
break;
|
|
case 'c':
|
|
c = va_arg(ap, int);
|
|
ret += putc(c, arg);
|
|
break;
|
|
case 'd':
|
|
if (lflag == 0) {
|
|
ui = (u_int)va_arg(ap, int);
|
|
if (ui < (int)ui) {
|
|
ui = -ui;
|
|
ret += putc('-', arg);
|
|
}
|
|
s = __uitoa(nbuf, ui, 10);
|
|
} else {
|
|
ul = (u_long)va_arg(ap, long);
|
|
if (ul < (long)ul) {
|
|
ul = -ul;
|
|
ret += putc('-', arg);
|
|
}
|
|
s = __ultoa(nbuf, ul, 10);
|
|
}
|
|
ret += __puts(s, putc, arg);
|
|
break;
|
|
case 'l':
|
|
lflag = 1;
|
|
goto reswitch;
|
|
case 'o':
|
|
if (lflag == 0) {
|
|
ui = (u_int)va_arg(ap, u_int);
|
|
s = __uitoa(nbuf, ui, 8);
|
|
} else {
|
|
ul = (u_long)va_arg(ap, u_long);
|
|
s = __ultoa(nbuf, ul, 8);
|
|
}
|
|
ret += __puts(s, putc, arg);
|
|
break;
|
|
case 'p':
|
|
ul = (u_long)va_arg(ap, void *);
|
|
s = __ultoa(nbuf, ul, 16);
|
|
ret += __puts("0x", putc, arg);
|
|
ret += __puts(s, putc, arg);
|
|
break;
|
|
case 's':
|
|
s = va_arg(ap, char *);
|
|
ret += __puts(s, putc, arg);
|
|
break;
|
|
case 'u':
|
|
if (lflag == 0) {
|
|
ui = va_arg(ap, u_int);
|
|
s = __uitoa(nbuf, ui, 10);
|
|
} else {
|
|
ul = va_arg(ap, u_long);
|
|
s = __ultoa(nbuf, ul, 10);
|
|
}
|
|
ret += __puts(s, putc, arg);
|
|
break;
|
|
case 'x':
|
|
if (lflag == 0) {
|
|
ui = va_arg(ap, u_int);
|
|
s = __uitoa(nbuf, ui, 16);
|
|
} else {
|
|
ul = va_arg(ap, u_long);
|
|
s = __ultoa(nbuf, ul, 16);
|
|
}
|
|
if (sflag)
|
|
ret += __puts("0x", putc, arg);
|
|
ret += __puts(s, putc, arg);
|
|
break;
|
|
case '0': case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
pad = pad * 10 + c - '0';
|
|
goto reswitch;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
__sputc(char c, void *arg)
|
|
{
|
|
struct sp_data *sp;
|
|
|
|
sp = arg;
|
|
if (sp->sp_len < sp->sp_size)
|
|
sp->sp_buf[sp->sp_len++] = c;
|
|
sp->sp_buf[sp->sp_len] = '\0';
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
__puts(const char *s, putc_func_t *putc, void *arg)
|
|
{
|
|
const char *p;
|
|
int ret;
|
|
|
|
ret = 0;
|
|
for (p = s; *p != '\0'; p++)
|
|
ret += putc(*p, arg);
|
|
return (ret);
|
|
}
|
|
|
|
static char *
|
|
__uitoa(char *buf, u_int ui, int base)
|
|
{
|
|
char *p;
|
|
|
|
p = buf;
|
|
*p = '\0';
|
|
do
|
|
*--p = digits[ui % base];
|
|
while ((ui /= base) != 0);
|
|
return (p);
|
|
}
|
|
|
|
static char *
|
|
__ultoa(char *buf, u_long ul, int base)
|
|
{
|
|
char *p;
|
|
|
|
p = buf;
|
|
*p = '\0';
|
|
do
|
|
*--p = digits[ul % base];
|
|
while ((ul /= base) != 0);
|
|
return (p);
|
|
}
|