/* * 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. */ /* * $FreeBSD$ */ #include #include #include #include #include #include #include #include #include #include #include #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 */ #define RBX_DFLTROOT 0x5 /* -r */ #define RBX_KDB 0x6 /* -d */ #define RBX_CONFIG 0xa /* -c */ #define RBX_VERBOSE 0xb /* -v */ #define RBX_SERIAL 0xc /* -h */ #define RBX_CDROM 0xd /* -C */ #define RBX_GDB 0xf /* -g */ #define RBX_MUTE 0x10 /* -m */ #define RBX_PAUSE 0x12 /* -p */ #define RBX_DUAL 0x1d /* -D */ #define RBX_PROBEKBD 0x1e /* -P */ #define RBX_NOINTR 0x1f /* -n */ #define RBX_MASK 0x2005ffff #define PATH_CONFIG "/boot.config" #define PATH_BOOT3 "/boot/loader" #define PATH_KERNEL "/kernel" #define ARGS 0x900 #define NOPT 14 #define NDEV 5 #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 2 #define TYPE_MAXHARD TYPE_DA #define TYPE_FD 4 extern uint32_t _end; static const char optstr[NOPT] = "DhaCcdgmnPprsv"; static const unsigned char flags[NOPT] = { RBX_DUAL, RBX_SERIAL, RBX_ASKNAME, RBX_CDROM, RBX_CONFIG, RBX_KDB, RBX_GDB, RBX_MUTE, RBX_NOINTR, RBX_PROBEKBD, RBX_PAUSE, RBX_DFLTROOT, RBX_SINGLE, RBX_VERBOSE }; static const char *const dev_nm[NDEV] = {"ad", "wd", "da", " ", "fd"}; static const unsigned char dev_maj[NDEV] = {30, 0, 4, 1, 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 = RB_BOOTINFO; static struct bootinfo bootinfo; static uint8_t ioctrl = IO_KEYBOARD; void exit(int); static void load(const char *); static int parse(char *); 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(int); static int drvread(void *, unsigned, unsigned); static int keyhit(unsigned); static int xputc(int); static int xgetc(int); static int getc(int); #if 1 #define memcpy __builtin_memcpy #else static void memcpy(char *, const char *, int); static void memcpy(char *dst, const char *src, int len) { while (len--) *dst++ = *src++; } #endif static inline int strcmp(const char *s1, const char *s2) { for (; *s1 == *s2 && *s1; s1++, s2++); return (u_char)*s1 - (u_char)*s2; } #include "ufsread.c" static int xfsread(ino_t inode, void *buf, size_t nbyte) { if (fsread(inode, buf, nbyte) != nbyte) { printf("Invalid %s\n", "format"); return -1; } return 0; } static inline void getstr(char *str, int size) { char *s; int c; s = str; for (;;) { switch (c = xgetc(0)) { case 0: break; case '\177': c = '\b'; case '\b': if (s > str) { s--; putchar('\b'); putchar(' '); } else c = 0; break; case '\n': case '\r': *s = 0; return; default: if (s - str < size - 1) *s++ = c; } if (c) putchar(c); } } static inline uint32_t drvinfo(int drive) { v86.addr = 0x13; v86.eax = 0x800; v86.edx = DRV_HARD + drive; v86int(); if (V86_CY(v86.efl)) return 0x4f010f; return ((v86.ecx & 0xc0) << 18) | ((v86.ecx & 0xff00) << 8) | (v86.edx & 0xff00) | (v86.ecx & 0x3f); } static inline void putc(int c) { v86.addr = 0x10; v86.eax = 0xe00 | (c & 0xff); v86.ebx = 0x7; v86int(); } int main(void) { int autoboot, i; 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(MEM_EXT); bootinfo.bi_memsizes_valid++; for (i = 0; i < N_BIOS_GEOM; i++) bootinfo.bi_bios_geom[i] = drvinfo(i); /* 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(cmd)) 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(kname); memcpy(kname, PATH_KERNEL, sizeof(PATH_KERNEL)); } } /* Present the user with the boot2 prompt. */ for (;;) { #ifdef UFS1_ONLY printf(" \n>> FreeBSD/i386/UFS1 BOOT\n" #else printf(" \n>> FreeBSD/i386/UFS[12] BOOT\n" #endif "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(cmd, sizeof(cmd)); else putchar('\n'); autoboot = 0; if (parse(cmd)) putchar('\a'); else load(kname); } } /* XXX - Needed for btxld to link the boot2 binary; do not remove. */ void exit(int x) { } static void load(const char *fname) { 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(fname))) { if (!ls) printf("No %s\n", fname); 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, (char *)&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, (char *)&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(fname); bootinfo.bi_bios_dev = dsk.drive; __exec((caddr_t)addr, 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) { char *p, *q; int drv, 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] == ':') { if (*arg < '0' || *arg > '9') return -1; drv = *arg - '0'; 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; if (arg[1] != ',' || *arg < '0' || *arg > '9') return -1; dsk.unit = *arg - '0'; arg += 2; dsk.slice = WHOLE_DISK_SLICE; if (arg[1] == ',') { if (*arg < '0' || *arg > '0' + NDOSPART) return -1; if ((dsk.slice = *arg - '0')) dsk.slice++; arg += 2; } if (arg[1] != ')' || *arg < 'a' || *arg > 'p') return -1; dsk.part = *arg - 'a'; arg += 2; if (drv == -1) drv = dsk.unit; dsk.drive = (dsk.type <= TYPE_MAXHARD ? DRV_HARD : 0) + drv; dsk_meta = 0; fsread(0, NULL, 0); } if ((i = p - arg - !*(p - 1))) { if (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,...) { static const char digits[16] = "0123456789abcdef"; va_list ap; char buf[10]; char *s; unsigned r, 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': case 'x': r = c == 'u' ? 10U : 16U; u = va_arg(ap, unsigned); s = buf; do *s++ = digits[u % r]; while (u /= r); 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 uint32_t memsize(int type) { v86.addr = type; v86.eax = 0x8800; v86int(); return v86.eax; } 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("Disk error 0x%x lba 0x%x\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); }