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Diffstat (limited to 'sys/boot/i386/gptboot/gptboot.c')
-rw-r--r--sys/boot/i386/gptboot/gptboot.c645
1 files changed, 645 insertions, 0 deletions
diff --git a/sys/boot/i386/gptboot/gptboot.c b/sys/boot/i386/gptboot/gptboot.c
new file mode 100644
index 0000000..bb58353
--- /dev/null
+++ b/sys/boot/i386/gptboot/gptboot.c
@@ -0,0 +1,645 @@
+/*-
+ * 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("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/disklabel.h>
+#include <sys/diskmbr.h>
+#include <sys/dirent.h>
+#include <sys/reboot.h>
+
+#include <machine/bootinfo.h>
+#include <machine/elf.h>
+
+#include <stdarg.h>
+
+#include <a.out.h>
+
+#include <btxv86.h>
+
+#include "boot2.h"
+#include "lib.h"
+
+#define IO_KEYBOARD 1
+#define IO_SERIAL 2
+
+#define SECOND 18 /* Circa that many ticks in a second. */
+
+#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_NOINTR 0x1c /* -n */
+/* 0x1d is reserved for log2(RB_MULTIPLE) and is just misnamed here. */
+#define RBX_DUAL 0x1d /* -D */
+#define RBX_PROBEKBD 0x1e /* -P */
+/* 0x1f is reserved for log2(RB_BOOTINFO). */
+
+/* pass: -a, -s, -r, -d, -c, -v, -h, -C, -g, -m, -p, -D */
+#define RBX_MASK 0x2005ffff
+
+#define PATH_CONFIG "/boot.config"
+#define PATH_BOOT3 "/boot/loader"
+#define PATH_KERNEL "/kernel"
+
+#define ARGS 0x900
+#define NOPT 12
+#define NDEV 3
+#define MEM_BASE 0x12
+#define MEM_EXT 0x15
+#define V86_CY(x) ((x) & 1)
+#define V86_ZR(x) ((x) & 0x40)
+
+#define DRV_HARD 0x80
+#define DRV_MASK 0x7f
+
+#define TYPE_AD 0
+#define TYPE_DA 1
+#define TYPE_MAXHARD TYPE_DA
+#define TYPE_FD 2
+
+extern uint32_t _end;
+
+static const char optstr[NOPT] = "DhaCgmnPprsv";
+static const unsigned char flags[NOPT] = {
+ RBX_DUAL,
+ RBX_SERIAL,
+ RBX_ASKNAME,
+ RBX_CDROM,
+ RBX_GDB,
+ RBX_MUTE,
+ RBX_NOINTR,
+ RBX_PROBEKBD,
+ RBX_PAUSE,
+ RBX_DFLTROOT,
+ RBX_SINGLE,
+ RBX_VERBOSE
+};
+
+static const char *const dev_nm[NDEV] = {"ad", "da", "fd"};
+static const unsigned char dev_maj[NDEV] = {30, 4, 2};
+
+static struct dsk {
+ unsigned drive;
+ unsigned type;
+ unsigned unit;
+ unsigned slice;
+ unsigned part;
+ unsigned start;
+ int init;
+} dsk;
+static char cmd[512];
+static char kname[1024];
+static uint32_t opts;
+static struct bootinfo bootinfo;
+static uint8_t ioctrl = IO_KEYBOARD;
+
+void exit(int);
+static void load(void);
+static int parse(void);
+static int xfsread(ino_t, void *, size_t);
+static int dskread(void *, unsigned, unsigned);
+static void printf(const char *,...);
+static void putchar(int);
+static uint32_t memsize(void);
+static int drvread(void *, unsigned, unsigned);
+static int keyhit(unsigned);
+static int xputc(int);
+static int xgetc(int);
+static int getc(int);
+
+#define memcpy __builtin_memcpy
+
+static inline int
+strcmp(const char *s1, const char *s2)
+{
+ for (; *s1 == *s2 && *s1; s1++, s2++);
+ return (unsigned char)*s1 - (unsigned char)*s2;
+}
+
+#include "ufsread.c"
+
+static int
+xfsread(ino_t inode, void *buf, size_t nbyte)
+{
+ if ((size_t)fsread(inode, buf, nbyte) != nbyte) {
+ printf("Invalid %s\n", "format");
+ return -1;
+ }
+ return 0;
+}
+
+static inline uint32_t
+memsize(void)
+{
+ v86.addr = MEM_EXT;
+ v86.eax = 0x8800;
+ v86int();
+ return v86.eax;
+}
+
+static inline void
+getstr(void)
+{
+ char *s;
+ int c;
+
+ s = cmd;
+ for (;;) {
+ switch (c = xgetc(0)) {
+ 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;
+ putchar(c);
+ }
+ }
+}
+
+static inline void
+putc(int c)
+{
+ v86.addr = 0x10;
+ v86.eax = 0xe00 | (c & 0xff);
+ v86.ebx = 0x7;
+ v86int();
+}
+
+int
+main(void)
+{
+ int autoboot;
+ ino_t ino;
+
+ dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base);
+ v86.ctl = V86_FLAGS;
+ dsk.drive = *(uint8_t *)PTOV(ARGS);
+ dsk.type = dsk.drive & DRV_HARD ? TYPE_AD : TYPE_FD;
+ dsk.unit = dsk.drive & DRV_MASK;
+ dsk.slice = *(uint8_t *)PTOV(ARGS + 1) + 1;
+ bootinfo.bi_version = BOOTINFO_VERSION;
+ bootinfo.bi_size = sizeof(bootinfo);
+ bootinfo.bi_basemem = 0; /* XXX will be filled by loader or kernel */
+ bootinfo.bi_extmem = memsize();
+ bootinfo.bi_memsizes_valid++;
+
+ /* Process configuration file */
+
+ autoboot = 1;
+
+ if ((ino = lookup(PATH_CONFIG)))
+ fsread(ino, cmd, sizeof(cmd));
+
+ if (*cmd) {
+ printf("%s: %s", PATH_CONFIG, cmd);
+ if (parse())
+ autoboot = 0;
+ /* Do not process this command twice */
+ *cmd = 0;
+ }
+
+ /*
+ * Try to exec stage 3 boot loader. If interrupted by a keypress,
+ * or in case of failure, try to load a kernel directly instead.
+ */
+
+ if (autoboot && !*kname) {
+ memcpy(kname, PATH_BOOT3, sizeof(PATH_BOOT3));
+ if (!keyhit(3*SECOND)) {
+ load();
+ memcpy(kname, PATH_KERNEL, sizeof(PATH_KERNEL));
+ }
+ }
+
+ /* Present the user with the boot2 prompt. */
+
+ for (;;) {
+ printf("\nFreeBSD/i386 boot\n"
+ "Default: %u:%s(%u,%c)%s\n"
+ "boot: ",
+ dsk.drive & DRV_MASK, dev_nm[dsk.type], dsk.unit,
+ 'a' + dsk.part, kname);
+ if (ioctrl & IO_SERIAL)
+ sio_flush();
+ if (!autoboot || keyhit(5*SECOND))
+ getstr();
+ else
+ putchar('\n');
+ autoboot = 0;
+ if (parse())
+ putchar('\a');
+ else
+ load();
+ }
+}
+
+/* XXX - Needed for btxld to link the boot2 binary; do not remove. */
+void
+exit(int x)
+{
+}
+
+static void
+load(void)
+{
+ union {
+ struct exec ex;
+ Elf32_Ehdr eh;
+ } hdr;
+ Elf32_Phdr ep[2];
+ Elf32_Shdr es[2];
+ caddr_t p;
+ ino_t ino;
+ uint32_t addr, x;
+ int fmt, i, j;
+
+ if (!(ino = lookup(kname))) {
+ if (!ls)
+ printf("No %s\n", kname);
+ return;
+ }
+ if (xfsread(ino, &hdr, sizeof(hdr)))
+ return;
+ if (N_GETMAGIC(hdr.ex) == ZMAGIC)
+ fmt = 0;
+ else if (IS_ELF(hdr.eh))
+ fmt = 1;
+ else {
+ printf("Invalid %s\n", "format");
+ return;
+ }
+ if (fmt == 0) {
+ addr = hdr.ex.a_entry & 0xffffff;
+ p = PTOV(addr);
+ fs_off = PAGE_SIZE;
+ if (xfsread(ino, p, hdr.ex.a_text))
+ return;
+ p += roundup2(hdr.ex.a_text, PAGE_SIZE);
+ if (xfsread(ino, p, hdr.ex.a_data))
+ return;
+ p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE);
+ bootinfo.bi_symtab = VTOP(p);
+ memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms));
+ p += sizeof(hdr.ex.a_syms);
+ if (hdr.ex.a_syms) {
+ if (xfsread(ino, p, hdr.ex.a_syms))
+ return;
+ p += hdr.ex.a_syms;
+ if (xfsread(ino, p, sizeof(int)))
+ return;
+ x = *(uint32_t *)p;
+ p += sizeof(int);
+ x -= sizeof(int);
+ if (xfsread(ino, p, x))
+ return;
+ p += x;
+ }
+ } else {
+ fs_off = hdr.eh.e_phoff;
+ for (j = i = 0; i < hdr.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 = PTOV(ep[i].p_paddr & 0xffffff);
+ fs_off = ep[i].p_offset;
+ if (xfsread(ino, p, ep[i].p_filesz))
+ return;
+ }
+ p += roundup2(ep[1].p_memsz, PAGE_SIZE);
+ bootinfo.bi_symtab = VTOP(p);
+ if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) {
+ fs_off = hdr.eh.e_shoff + sizeof(es[0]) *
+ (hdr.eh.e_shstrndx + 1);
+ if (xfsread(ino, &es, sizeof(es)))
+ return;
+ for (i = 0; i < 2; i++) {
+ memcpy(p, &es[i].sh_size, sizeof(es[i].sh_size));
+ p += sizeof(es[i].sh_size);
+ fs_off = es[i].sh_offset;
+ if (xfsread(ino, p, es[i].sh_size))
+ return;
+ p += es[i].sh_size;
+ }
+ }
+ addr = hdr.eh.e_entry & 0xffffff;
+ }
+ bootinfo.bi_esymtab = VTOP(p);
+ bootinfo.bi_kernelname = VTOP(kname);
+ bootinfo.bi_bios_dev = dsk.drive;
+ __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK),
+ MAKEBOOTDEV(dev_maj[dsk.type], 0, dsk.slice, dsk.unit, dsk.part),
+ 0, 0, 0, VTOP(&bootinfo));
+}
+
+static int
+parse()
+{
+ char *arg = cmd;
+ char *p, *q;
+ unsigned int drv;
+ int c, i;
+
+ while ((c = *arg++)) {
+ if (c == ' ' || c == '\t' || c == '\n')
+ continue;
+ for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
+ if (*p)
+ *p++ = 0;
+ if (c == '-') {
+ while ((c = *arg++)) {
+ for (i = 0; c != optstr[i]; i++)
+ if (i == NOPT - 1)
+ return -1;
+ opts ^= 1 << flags[i];
+ }
+ if (opts & 1 << RBX_PROBEKBD) {
+ i = *(uint8_t *)PTOV(0x496) & 0x10;
+ printf("Keyboard: %s\n", i ? "yes" : "no");
+ if (!i)
+ opts |= 1 << RBX_DUAL | 1 << RBX_SERIAL;
+ opts &= ~(1 << RBX_PROBEKBD);
+ }
+ ioctrl = opts & 1 << RBX_DUAL ? (IO_SERIAL|IO_KEYBOARD) :
+ opts & 1 << RBX_SERIAL ? IO_SERIAL : IO_KEYBOARD;
+ if (ioctrl & IO_SERIAL)
+ sio_init();
+ } else {
+ for (q = arg--; *q && *q != '('; q++);
+ if (*q) {
+ drv = -1;
+ if (arg[1] == ':') {
+ drv = *arg - '0';
+ if (drv > 9)
+ return (-1);
+ arg += 2;
+ }
+ if (q - arg != 2)
+ return -1;
+ for (i = 0; arg[0] != dev_nm[i][0] ||
+ arg[1] != dev_nm[i][1]; i++)
+ if (i == NDEV - 1)
+ return -1;
+ dsk.type = i;
+ arg += 3;
+ dsk.unit = *arg - '0';
+ if (arg[1] != ',' || dsk.unit > 9)
+ return -1;
+ arg += 2;
+ dsk.slice = WHOLE_DISK_SLICE;
+ if (arg[1] == ',') {
+ dsk.slice = *arg - '0' + 1;
+ if (dsk.slice > NDOSPART)
+ return -1;
+ arg += 2;
+ }
+ if (arg[1] != ')')
+ return -1;
+ dsk.part = *arg - 'a';
+ if (dsk.part > 7)
+ return (-1);
+ arg += 2;
+ if (drv == -1)
+ drv = dsk.unit;
+ dsk.drive = (dsk.type <= TYPE_MAXHARD
+ ? DRV_HARD : 0) + drv;
+ dsk_meta = 0;
+ }
+ if ((i = p - arg - !*(p - 1))) {
+ 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;
+ unsigned sl, i;
+
+ if (!dsk_meta) {
+ sec = dmadat->secbuf;
+ dsk.start = 0;
+ if (drvread(sec, DOSBBSECTOR, 1))
+ return -1;
+ dp = (void *)(sec + DOSPARTOFF);
+ sl = dsk.slice;
+ if (sl < BASE_SLICE) {
+ for (i = 0; i < NDOSPART; i++)
+ if (dp[i].dp_typ == DOSPTYP_386BSD &&
+ (dp[i].dp_flag & 0x80 || sl < BASE_SLICE)) {
+ sl = BASE_SLICE + i;
+ if (dp[i].dp_flag & 0x80 ||
+ dsk.slice == COMPATIBILITY_SLICE)
+ break;
+ }
+ if (dsk.slice == WHOLE_DISK_SLICE)
+ dsk.slice = sl;
+ }
+ if (sl != WHOLE_DISK_SLICE) {
+ if (sl != COMPATIBILITY_SLICE)
+ dp += sl - BASE_SLICE;
+ if (dp->dp_typ != DOSPTYP_386BSD) {
+ printf("Invalid %s\n", "slice");
+ return -1;
+ }
+ dsk.start = dp->dp_start;
+ }
+ if (drvread(sec, dsk.start + LABELSECTOR, 1))
+ return -1;
+ d = (void *)(sec + LABELOFFSET);
+ if (d->d_magic != DISKMAGIC || d->d_magic2 != DISKMAGIC) {
+ if (dsk.part != RAW_PART) {
+ printf("Invalid %s\n", "label");
+ return -1;
+ }
+ } else {
+ if (!dsk.init) {
+ if (d->d_type == DTYPE_SCSI)
+ dsk.type = TYPE_DA;
+ dsk.init++;
+ }
+ if (dsk.part >= d->d_npartitions ||
+ !d->d_partitions[dsk.part].p_size) {
+ printf("Invalid %s\n", "partition");
+ return -1;
+ }
+ dsk.start += d->d_partitions[dsk.part].p_offset;
+ dsk.start -= d->d_partitions[RAW_PART].p_offset;
+ }
+ }
+ return drvread(buf, dsk.start + lba, nblk);
+}
+
+static void
+printf(const char *fmt,...)
+{
+ va_list ap;
+ char buf[10];
+ char *s;
+ unsigned u;
+ int c;
+
+ va_start(ap, fmt);
+ while ((c = *fmt++)) {
+ if (c == '%') {
+ c = *fmt++;
+ switch (c) {
+ case 'c':
+ putchar(va_arg(ap, int));
+ continue;
+ case 's':
+ for (s = va_arg(ap, char *); *s; s++)
+ putchar(*s);
+ continue;
+ case 'u':
+ u = va_arg(ap, unsigned);
+ s = buf;
+ do
+ *s++ = '0' + u % 10U;
+ while (u /= 10U);
+ while (--s >= buf)
+ putchar(*s);
+ continue;
+ }
+ }
+ putchar(c);
+ }
+ va_end(ap);
+ return;
+}
+
+static void
+putchar(int c)
+{
+ if (c == '\n')
+ xputc('\r');
+ xputc(c);
+}
+
+static int
+drvread(void *buf, unsigned lba, unsigned nblk)
+{
+ static unsigned c = 0x2d5c7c2f;
+
+ printf("%c\b", c = c << 8 | c >> 24);
+ v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
+ v86.addr = XREADORG; /* call to xread in boot1 */
+ v86.es = VTOPSEG(buf);
+ v86.eax = lba;
+ v86.ebx = VTOPOFF(buf);
+ v86.ecx = lba >> 16;
+ v86.edx = nblk << 8 | dsk.drive;
+ v86int();
+ v86.ctl = V86_FLAGS;
+ if (V86_CY(v86.efl)) {
+ printf("error %u lba %u\n", v86.eax >> 8 & 0xff, lba);
+ return -1;
+ }
+ return 0;
+}
+
+static int
+keyhit(unsigned ticks)
+{
+ uint32_t t0, t1;
+
+ if (opts & 1 << RBX_NOINTR)
+ return 0;
+ t0 = 0;
+ for (;;) {
+ if (xgetc(1))
+ return 1;
+ t1 = *(uint32_t *)PTOV(0x46c);
+ if (!t0)
+ t0 = t1;
+ if (t1 < t0 || t1 >= t0 + ticks)
+ return 0;
+ }
+}
+
+static int
+xputc(int c)
+{
+ if (ioctrl & IO_KEYBOARD)
+ putc(c);
+ if (ioctrl & IO_SERIAL)
+ sio_putc(c);
+ return c;
+}
+
+static int
+xgetc(int fn)
+{
+ if (opts & 1 << RBX_NOINTR)
+ return 0;
+ for (;;) {
+ if (ioctrl & IO_KEYBOARD && getc(1))
+ return fn ? 1 : getc(0);
+ if (ioctrl & IO_SERIAL && sio_ischar())
+ return fn ? 1 : sio_getc();
+ if (fn)
+ return 0;
+ }
+}
+
+static int
+getc(int fn)
+{
+ v86.addr = 0x16;
+ v86.eax = fn << 8;
+ v86int();
+ return fn == 0 ? v86.eax & 0xff : !V86_ZR(v86.efl);
+}
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