freebsd-skq/sys/boot/powerpc/boot1.chrp/boot1.c
trasz c79d634c53 Fix build on powerpc.
Reviewed by:	nwhitehorn
2012-11-19 01:15:32 +00:00

772 lines
14 KiB
C

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