| Current Path : /sys/boot/arm/at91/boot2/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/boot/arm/at91/boot2/boot2.c |
/*-
* Copyright (c) 2008 John Hay
* Copyright (c) 2006 Warner Losh
* Copyright (c) 1998 Robert Nordier
* 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: release/9.1.0/sys/boot/arm/at91/boot2/boot2.c 231287 2012-02-09 16:53:51Z bapt $");
#include <sys/param.h>
#include <sys/disklabel.h>
#include <sys/diskmbr.h>
#include <sys/dirent.h>
#include <sys/reboot.h>
#include <machine/elf.h>
#include <stdarg.h>
#include "lib.h"
#include "board.h"
#define RBX_ASKNAME 0x0 /* -a */
#define RBX_SINGLE 0x1 /* -s */
/* 0x2 is reserved for log2(RB_NOSYNC). */
/* 0x3 is reserved for log2(RB_HALT). */
/* 0x4 is reserved for log2(RB_INITNAME). */
#define RBX_DFLTROOT 0x5 /* -r */
/* #define RBX_KDB 0x6 -d */
/* 0x7 is reserved for log2(RB_RDONLY). */
/* 0x8 is reserved for log2(RB_DUMP). */
/* 0x9 is reserved for log2(RB_MINIROOT). */
#define RBX_CONFIG 0xa /* -c */
#define RBX_VERBOSE 0xb /* -v */
/* #define RBX_SERIAL 0xc -h */
/* #define RBX_CDROM 0xd -C */
/* 0xe is reserved for log2(RB_POWEROFF). */
#define RBX_GDB 0xf /* -g */
/* #define RBX_MUTE 0x10 -m */
/* 0x11 is reserved for log2(RB_SELFTEST). */
/* 0x12 is reserved for boot programs. */
/* 0x13 is reserved for boot programs. */
/* #define RBX_PAUSE 0x14 -p */
/* #define RBX_QUIET 0x15 -q */
#define RBX_NOINTR 0x1c /* -n */
/* 0x1d is reserved for log2(RB_MULTIPLE) and is just misnamed here. */
/* #define RBX_DUAL 0x1d -D */
/* 0x1f is reserved for log2(RB_BOOTINFO). */
/* pass: -a, -s, -r, -v, -g */
#define RBX_MASK (OPT_SET(RBX_ASKNAME) | OPT_SET(RBX_SINGLE) | \
OPT_SET(RBX_DFLTROOT) | \
OPT_SET(RBX_VERBOSE) | \
OPT_SET(RBX_GDB))
#define PATH_DOTCONFIG "/boot.config"
#define PATH_CONFIG "/boot/config"
//#define PATH_KERNEL "/boot/kernel/kernel"
#define PATH_KERNEL "/boot/kernel/kernel.gz.tramp"
extern uint32_t _end;
#define NOPT 6
#define OPT_SET(opt) (1 << (opt))
#define OPT_CHECK(opt) ((opts) & OPT_SET(opt))
static const char optstr[NOPT] = "agnrsv";
static const unsigned char flags[NOPT] = {
RBX_ASKNAME,
RBX_GDB,
RBX_NOINTR,
RBX_DFLTROOT,
RBX_SINGLE,
RBX_VERBOSE
};
unsigned dsk_start;
static char cmd[512];
static char kname[1024];
static uint32_t opts;
static int dsk_meta;
static void load(void);
static int parse(void);
static int xfsread(ino_t, void *, size_t);
static int dskread(void *, unsigned, unsigned);
#ifdef FIXUP_BOOT_DRV
static void fixup_boot_drv(caddr_t, int, int, int);
#endif
#define UFS_SMALL_CGBASE
#include "ufsread.c"
#ifdef DEBUG
#define DPRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
#else
#define DPRINTF(fmt, ...)
#endif
static inline int
xfsread(ino_t inode, void *buf, size_t nbyte)
{
if ((size_t)fsread(inode, buf, nbyte) != nbyte)
return -1;
return 0;
}
static inline void
getstr(int c)
{
char *s;
s = cmd;
if (c == 0)
c = getc(10000);
for (;;) {
switch (c) {
case 0:
break;
case '\177':
case '\b':
if (s > cmd) {
s--;
printf("\b \b");
}
break;
case '\n':
case '\r':
*s = 0;
return;
default:
if (s - cmd < sizeof(cmd) - 1)
*s++ = c;
xputchar(c);
}
c = getc(10000);
}
}
int
main(void)
{
int autoboot, c = 0;
ino_t ino;
dmadat = (void *)(0x20000000 + (16 << 20));
board_init();
autoboot = 1;
/* Process configuration file */
if ((ino = lookup(PATH_CONFIG)) ||
(ino = lookup(PATH_DOTCONFIG)))
fsread(ino, cmd, sizeof(cmd));
if (*cmd) {
if (parse())
autoboot = 0;
printf("%s: %s\n", PATH_CONFIG, cmd);
/* Do not process this command twice */
*cmd = 0;
}
if (*kname == '\0')
strcpy(kname, PATH_KERNEL);
/* Present the user with the boot2 prompt. */
for (;;) {
printf("\nDefault: %s\nboot: ", kname);
if (!autoboot ||
(OPT_CHECK(RBX_NOINTR) == 0 && (c = getc(2)) != 0))
getstr(c);
xputchar('\n');
autoboot = 0;
c = 0;
if (parse())
xputchar('\a');
else
load();
}
}
static void
load(void)
{
Elf32_Ehdr eh;
static Elf32_Phdr ep[2];
caddr_t p;
ino_t ino;
uint32_t addr;
int i, j;
#ifdef FIXUP_BOOT_DRV
caddr_t staddr;
int klen;
staddr = (caddr_t)0xffffffff;
klen = 0;
#endif
if (!(ino = lookup(kname))) {
if (!ls)
printf("No %s\n", kname);
return;
}
if (xfsread(ino, &eh, sizeof(eh)))
return;
if (!IS_ELF(eh)) {
printf("Invalid %s\n", "format");
return;
}
fs_off = eh.e_phoff;
for (j = i = 0; i < eh.e_phnum && j < 2; i++) {
if (xfsread(ino, ep + j, sizeof(ep[0])))
return;
if (ep[j].p_type == PT_LOAD)
j++;
}
for (i = 0; i < 2; i++) {
p = (caddr_t)ep[i].p_paddr;
fs_off = ep[i].p_offset;
#ifdef FIXUP_BOOT_DRV
if (staddr == (caddr_t)0xffffffff)
staddr = p;
klen += ep[i].p_filesz;
#endif
if (xfsread(ino, p, ep[i].p_filesz))
return;
}
addr = eh.e_entry;
#ifdef FIXUP_BOOT_DRV
fixup_boot_drv(staddr, klen, bootslice, bootpart);
#endif
((void(*)(int))addr)(opts & RBX_MASK);
}
static int
parse()
{
char *arg = cmd;
char *ep, *p;
int c, i;
while ((c = *arg++)) {
if (c == ' ' || c == '\t' || c == '\n')
continue;
for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
ep = p;
if (*p)
*p++ = 0;
if (c == '-') {
while ((c = *arg++)) {
for (i = 0; c != optstr[i]; i++)
if (i == NOPT - 1)
return -1;
opts ^= OPT_SET(flags[i]);
}
} else {
arg--;
if ((i = ep - arg)) {
if ((size_t)i >= sizeof(kname))
return -1;
memcpy(kname, arg, i + 1);
}
}
arg = p;
}
return 0;
}
static int
dskread(void *buf, unsigned lba, unsigned nblk)
{
struct dos_partition *dp;
struct disklabel *d;
char *sec;
int i;
if (!dsk_meta) {
sec = dmadat->secbuf;
dsk_start = 0;
if (drvread(sec, DOSBBSECTOR, 1))
return -1;
dp = (void *)(sec + DOSPARTOFF);
for (i = 0; i < NDOSPART; i++) {
if (dp[i].dp_typ == DOSPTYP_386BSD)
break;
}
if (i == NDOSPART)
return -1;
/*
* Although dp_start is aligned within the disk
* partition structure, DOSPARTOFF is 446, which is
* only word (2) aligned, not longword (4) aligned.
* Cope by using memcpy to fetch the start of this
* partition.
*/
memcpy(&dsk_start, &dp[1].dp_start, 4);
if (drvread(sec, dsk_start + LABELSECTOR, 1))
return -1;
d = (void *)(sec + LABELOFFSET);
if (d->d_magic != DISKMAGIC || d->d_magic2 != DISKMAGIC) {
printf("Invalid %s\n", "label");
return -1;
}
if (!d->d_partitions[0].p_size) {
printf("Invalid %s\n", "partition");
return -1;
}
dsk_start += d->d_partitions[0].p_offset;
dsk_start -= d->d_partitions[RAW_PART].p_offset;
dsk_meta++;
}
return drvread(buf, dsk_start + lba, nblk);
}
#ifdef FIXUP_BOOT_DRV
/*
* fixup_boot_drv() will try to find the ROOTDEVNAME spec in the kernel
* and change it to what was specified on the comandline or /boot.conf
* file or to what was encountered on the disk. It will try to handle 3
* different disk layouts, raw (dangerously dedicated), slice only and
* slice + partition. It will look for the following strings in the
* kernel, but if it is one of the first three, the string in the kernel
* must use the correct form to match the actual disk layout:
* - ufs:ad0a
* - ufs:ad0s1
* - ufs:ad0s1a
* - ufs:ROOTDEVNAME
* In the case of the first three strings, only the "a" at the end and
* the "1" after the "s" will be modified, if they exist. The string
* length will not be changed. In the case of the last string, the
* whole string will be built up and nul, '\0' terminated.
*/
static void
fixup_boot_drv(caddr_t addr, int klen, int bs, int bp)
{
const u_int8_t op[] = "ufs:ROOTDEVNAME";
const u_int8_t op2[] = "ufs:ad0";
u_int8_t *p, *ps;
DPRINTF("fixup_boot_drv: 0x%x, %d, slice %d, partition %d\n",
(int)addr, klen, bs, bp);
if (bs > 4)
return;
if (bp > 7)
return;
ps = memmem(addr, klen, op, sizeof(op));
if (ps != NULL) {
p = ps + 4; /* past ufs: */
DPRINTF("Found it at 0x%x\n", (int)ps);
p[0] = 'a'; p[1] = 'd'; p[2] = '0'; /* ad0 */
p += 3;
if (bs > 0) {
/* append slice */
*p++ = 's';
*p++ = bs + '0';
}
if (disk_layout != DL_SLICE) {
/* append partition */
*p++ = bp + 'a';
}
*p = '\0';
} else {
ps = memmem(addr, klen, op2, sizeof(op2) - 1);
if (ps != NULL) {
p = ps + sizeof(op2) - 1;
DPRINTF("Found it at 0x%x\n", (int)ps);
if (*p == 's') {
/* fix slice */
p++;
*p++ = bs + '0';
}
if (*p == 'a')
*p = bp + 'a';
}
}
if (ps == NULL) {
printf("Could not locate \"%s\" to fix kernel boot device, "
"check ROOTDEVNAME is set\n", op);
return;
}
DPRINTF("Changed boot device to %s\n", ps);
}
#endif