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-rw-r--r--stand/pc98/boot2/boot2.c803
1 files changed, 803 insertions, 0 deletions
diff --git a/stand/pc98/boot2/boot2.c b/stand/pc98/boot2/boot2.c
new file mode 100644
index 0000000..b582516
--- /dev/null
+++ b/stand/pc98/boot2/boot2.c
@@ -0,0 +1,803 @@
+/*-
+ * Copyright (c) 2008-2009 TAKAHASHI Yoshihiro
+ * 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/diskpc98.h>
+#include <sys/dirent.h>
+#include <sys/reboot.h>
+
+#include <machine/bootinfo.h>
+#include <machine/cpufunc.h>
+#include <machine/elf.h>
+
+#include <stdarg.h>
+
+#include <a.out.h>
+
+#include <btxv86.h>
+
+#include "boot2.h"
+#include "lib.h"
+#include "paths.h"
+#include "rbx.h"
+
+/* Define to 0 to omit serial support */
+#ifndef SERIAL
+#define SERIAL 0
+#endif
+
+#define IO_KEYBOARD 1
+#define IO_SERIAL 2
+
+#if SERIAL
+#define DO_KBD (ioctrl & IO_KEYBOARD)
+#define DO_SIO (ioctrl & IO_SERIAL)
+#else
+#define DO_KBD (1)
+#define DO_SIO (0)
+#endif
+
+#define SECOND 1 /* Circa that many ticks in a second. */
+
+#define ARGS 0x900
+#define NOPT 14
+#define NDEV 3
+
+#define DRV_DISK 0xf0
+#define DRV_UNIT 0x0f
+
+#define TYPE_AD 0
+#define TYPE_DA 1
+#define TYPE_FD 2
+
+extern uint32_t _end;
+
+static const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */
+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_PAUSE,
+ RBX_QUIET,
+ 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 const unsigned char dev_daua[NDEV] = {0x80, 0xa0, 0x90};
+
+static struct dsk {
+ unsigned daua;
+ unsigned type;
+ unsigned disk;
+ unsigned unit;
+ unsigned head;
+ unsigned sec;
+ uint8_t slice;
+ uint8_t part;
+ unsigned start;
+} dsk;
+static char cmd[512], cmddup[512], knamebuf[1024];
+static const char *kname;
+uint32_t opts;
+static struct bootinfo bootinfo;
+#if SERIAL
+static int comspeed = SIOSPD;
+static uint8_t ioctrl = IO_KEYBOARD;
+#endif
+
+int main(void);
+void exit(int);
+static void load(void);
+static int parse(void);
+static int dskread(void *, unsigned, unsigned);
+static void printf(const char *,...);
+static void putchar(int);
+static int drvread(void *, unsigned);
+static int keyhit(unsigned);
+static int xputc(int);
+static int xgetc(int);
+static inline int getc(int);
+
+static void memcpy(void *, const void *, int);
+static void
+memcpy(void *dst, const void *src, int len)
+{
+ const char *s = src;
+ char *d = dst;
+
+ while (len--)
+ *d++ = *s++;
+}
+
+static inline int
+strcmp(const char *s1, const char *s2)
+{
+ for (; *s1 == *s2 && *s1; s1++, s2++);
+ return (unsigned char)*s1 - (unsigned char)*s2;
+}
+
+#define UFS_SMALL_CGBASE
+#include "ufsread.c"
+
+static inline int
+xfsread(ufs_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 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.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
+ v86.addr = PUTCORG; /* call to putc in boot1 */
+ v86.eax = c;
+ v86int();
+ v86.ctl = V86_FLAGS;
+}
+
+static inline int
+is_scsi_hd(void)
+{
+
+ if ((*(u_char *)PTOV(0x482) >> dsk.unit) & 0x01)
+ return 1;
+
+ return 0;
+}
+
+static inline void
+fix_sector_size(void)
+{
+ u_char *p;
+
+ p = (u_char *)PTOV(0x460 + dsk.unit * 4); /* SCSI equipment parameter */
+
+ if ((p[0] & 0x1f) == 7) { /* SCSI MO */
+ if (!(p[3] & 0x30)) { /* 256B / sector */
+ p[3] |= 0x10; /* forced set 512B / sector */
+ p[3 + 0xa1000] |= 0x10;
+ }
+ }
+}
+
+static inline uint32_t
+get_diskinfo(void)
+{
+
+ if (dsk.disk == 0x30) { /* 1440KB FD */
+ /* 80 cylinders, 2 heads, 18 sectors */
+ return (80 << 16) | (2 << 8) | 18;
+ } else if (dsk.disk == 0x90) { /* 1200KB FD */
+ /* 80 cylinders, 2 heads, 15 sectors */
+ return (80 << 16) | (2 << 8) | 15;
+ } else if (dsk.disk == 0x80 || is_scsi_hd()) { /* IDE or SCSI HDD */
+ v86.addr = 0x1b;
+ v86.eax = 0x8400 | dsk.daua;
+ v86int();
+ return (v86.ecx << 16) | v86.edx;
+ }
+
+ /* SCSI MO or CD */
+ fix_sector_size(); /* SCSI MO */
+
+ /* other SCSI devices */
+ return (65535 << 16) | (8 << 8) | 32;
+}
+
+static void
+set_dsk(void)
+{
+ uint32_t di;
+
+ di = get_diskinfo();
+
+ dsk.head = (di >> 8) & 0xff;
+ dsk.sec = di & 0xff;
+ dsk.start = 0;
+}
+
+#ifdef GET_BIOSGEOM
+static uint32_t
+bd_getbigeom(int bunit)
+{
+ int hds = 0;
+ int unit = 0x80; /* IDE HDD */
+ u_int addr = 0x55d;
+
+ while (unit < 0xa7) {
+ if (*(u_char *)PTOV(addr) & (1 << (unit & 0x0f)))
+ if (hds++ == bunit)
+ break;
+
+ if (unit >= 0xA0) {
+ int media = ((unsigned *)PTOV(0x460))[unit & 0x0F] & 0x1F;
+
+ if (media == 7 && hds++ == bunit) /* SCSI MO */
+ return(0xFFFE0820); /* C:65535 H:8 S:32 */
+ }
+ if (++unit == 0x84) {
+ unit = 0xA0; /* SCSI HDD */
+ addr = 0x482;
+ }
+ }
+ if (unit == 0xa7)
+ return 0x4F020F; /* 1200KB FD C:80 H:2 S:15 */
+ v86.addr = 0x1b;
+ v86.eax = 0x8400 | unit;
+ v86int();
+ if (V86_CY(v86.efl))
+ return 0x4F020F; /* 1200KB FD C:80 H:2 S:15 */
+ return ((v86.ecx & 0xffff) << 16) | (v86.edx & 0xffff);
+}
+#endif
+
+static int
+check_slice(void)
+{
+ struct pc98_partition *dp;
+ char *sec;
+ unsigned i, cyl;
+
+ sec = dmadat->secbuf;
+ cyl = *(uint16_t *)PTOV(ARGS);
+ set_dsk();
+
+ if (dsk.type == TYPE_FD)
+ return (WHOLE_DISK_SLICE);
+ if (drvread(sec, PC98_BBSECTOR))
+ return (WHOLE_DISK_SLICE); /* Read error */
+ dp = (void *)(sec + PC98_PARTOFF);
+ for (i = 0; i < PC98_NPARTS; i++) {
+ if (dp[i].dp_mid == DOSMID_386BSD) {
+ if (dp[i].dp_scyl <= cyl && cyl <= dp[i].dp_ecyl)
+ return (BASE_SLICE + i);
+ }
+ }
+
+ return (WHOLE_DISK_SLICE);
+}
+
+int
+main(void)
+{
+#ifdef GET_BIOSGEOM
+ int i;
+#endif
+ uint8_t autoboot;
+ ufs_ino_t ino;
+ size_t nbyte;
+
+ dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base);
+ v86.ctl = V86_FLAGS;
+ v86.efl = PSL_RESERVED_DEFAULT | PSL_I;
+ dsk.daua = *(uint8_t *)PTOV(0x584);
+ dsk.disk = dsk.daua & DRV_DISK;
+ dsk.unit = dsk.daua & DRV_UNIT;
+ if (dsk.disk == 0x80)
+ dsk.type = TYPE_AD;
+ else if (dsk.disk == 0xa0)
+ dsk.type = TYPE_DA;
+ else /* if (dsk.disk == 0x30 || dsk.disk == 0x90) */
+ dsk.type = TYPE_FD;
+ dsk.slice = check_slice();
+#ifdef GET_BIOSGEOM
+ for (i = 0; i < N_BIOS_GEOM; i++)
+ bootinfo.bi_bios_geom[i] = bd_getbigeom(i);
+#endif
+ bootinfo.bi_version = BOOTINFO_VERSION;
+ bootinfo.bi_size = sizeof(bootinfo);
+
+ /* Process configuration file */
+
+ autoboot = 1;
+
+ if ((ino = lookup(PATH_CONFIG)) ||
+ (ino = lookup(PATH_DOTCONFIG))) {
+ nbyte = fsread(ino, cmd, sizeof(cmd) - 1);
+ cmd[nbyte] = '\0';
+ }
+
+ if (*cmd) {
+ memcpy(cmddup, cmd, sizeof(cmd));
+ if (parse())
+ autoboot = 0;
+ if (!OPT_CHECK(RBX_QUIET))
+ printf("%s: %s", PATH_CONFIG, cmddup);
+ /* 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 (!kname) {
+ kname = PATH_LOADER;
+ if (autoboot && !keyhit(3*SECOND)) {
+ load();
+ kname = PATH_KERNEL;
+ }
+ }
+
+ /* Present the user with the boot2 prompt. */
+
+ for (;;) {
+ if (!autoboot || !OPT_CHECK(RBX_QUIET))
+ printf("\nFreeBSD/pc98 boot\n"
+ "Default: %u:%s(%u,%c)%s\n"
+ "boot: ",
+ dsk.unit, dev_nm[dsk.type], dsk.unit,
+ 'a' + dsk.part, kname);
+ if (DO_SIO)
+ sio_flush();
+ if (!autoboot || keyhit(3*SECOND))
+ getstr();
+ else if (!autoboot || !OPT_CHECK(RBX_QUIET))
+ 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;
+ static Elf32_Phdr ep[2];
+ static Elf32_Shdr es[2];
+ caddr_t p;
+ ufs_ino_t ino;
+ uint32_t addr;
+ int k;
+ uint8_t 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) {
+ 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;
+ } else if (IS_ELF(hdr.eh)) {
+ fs_off = hdr.eh.e_phoff;
+ for (j = k = 0; k < hdr.eh.e_phnum && j < 2; k++) {
+ 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++) {
+ *(Elf32_Word *)p = 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);
+ } else {
+ printf("Invalid %s\n", "format");
+ return;
+ }
+
+ bootinfo.bi_kernelname = VTOP(kname);
+ bootinfo.bi_bios_dev = dsk.daua;
+ __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK),
+ MAKEBOOTDEV(dev_maj[dsk.type], dsk.slice, dsk.unit, dsk.part),
+ 0, 0, 0, VTOP(&bootinfo));
+}
+
+static int
+parse()
+{
+ char *arg = cmd;
+ char *ep, *p, *q;
+ const char *cp;
+ unsigned int drv;
+ int c, i, j;
+ size_t k;
+
+ 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++)) {
+ if (c == 'P') {
+ if (*(uint8_t *)PTOV(0x481) & 0x48) {
+ cp = "yes";
+ } else {
+ opts |= OPT_SET(RBX_DUAL) | OPT_SET(RBX_SERIAL);
+ cp = "no";
+ }
+ printf("Keyboard: %s\n", cp);
+ continue;
+#if SERIAL
+ } else if (c == 'S') {
+ j = 0;
+ while ((unsigned int)(i = *arg++ - '0') <= 9)
+ j = j * 10 + i;
+ if (j > 0 && i == -'0') {
+ comspeed = j;
+ break;
+ }
+ /* Fall through to error below ('S' not in optstr[]). */
+#endif
+ }
+ for (i = 0; c != optstr[i]; i++)
+ if (i == NOPT - 1)
+ return -1;
+ opts ^= OPT_SET(flags[i]);
+ }
+#if SERIAL
+ ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) :
+ OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD;
+ if (DO_SIO) {
+ if (sio_init(115200 / comspeed) != 0)
+ ioctrl &= ~IO_SERIAL;
+ }
+#endif
+ } 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 > PC98_NPARTS + 1)
+ 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.disk = dev_daua[dsk.type];
+ dsk.daua = dsk.disk | dsk.unit;
+ dsk_meta = 0;
+ }
+ k = ep - arg;
+ if (k > 0) {
+ if (k >= sizeof(knamebuf))
+ return -1;
+ memcpy(knamebuf, arg, k + 1);
+ kname = knamebuf;
+ }
+ }
+ arg = p;
+ }
+ return 0;
+}
+
+static int
+dskread(void *buf, unsigned lba, unsigned nblk)
+{
+ struct pc98_partition *dp;
+ struct disklabel *d;
+ char *sec;
+ unsigned i;
+ uint8_t sl;
+ u_char *p;
+ const char *reason;
+
+ if (!dsk_meta) {
+ sec = dmadat->secbuf;
+ set_dsk();
+ if (dsk.type == TYPE_FD)
+ goto unsliced;
+ if (drvread(sec, PC98_BBSECTOR))
+ return -1;
+ dp = (void *)(sec + PC98_PARTOFF);
+ sl = dsk.slice;
+ if (sl < BASE_SLICE) {
+ for (i = 0; i < PC98_NPARTS; i++)
+ if (dp[i].dp_mid == DOSMID_386BSD) {
+ sl = BASE_SLICE + i;
+ break;
+ }
+ dsk.slice = sl;
+ }
+ if (sl != WHOLE_DISK_SLICE) {
+ dp += sl - BASE_SLICE;
+ if (dp->dp_mid != DOSMID_386BSD) {
+ reason = "slice";
+ goto error;
+ }
+ dsk.start = dp->dp_scyl * dsk.head * dsk.sec +
+ dp->dp_shd * dsk.sec + dp->dp_ssect;
+ }
+ if (drvread(sec, dsk.start + LABELSECTOR))
+ return -1;
+ d = (void *)(sec + LABELOFFSET);
+ if (d->d_magic != DISKMAGIC || d->d_magic2 != DISKMAGIC) {
+ if (dsk.part != RAW_PART) {
+ reason = "label";
+ goto error;
+ }
+ } else {
+ if (dsk.part >= d->d_npartitions ||
+ !d->d_partitions[dsk.part].p_size) {
+ reason = "partition";
+ goto error;
+ }
+ dsk.start += d->d_partitions[dsk.part].p_offset;
+ dsk.start -= d->d_partitions[RAW_PART].p_offset;
+ }
+ unsliced: ;
+ }
+ for (p = buf; nblk; p += 512, lba++, nblk--) {
+ if ((i = drvread(p, dsk.start + lba)))
+ return i;
+ }
+ return 0;
+error:
+ printf("Invalid %s\n", reason);
+ return -1;
+}
+
+static void
+printf(const char *fmt,...)
+{
+ va_list ap;
+ static 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)
+{
+ static unsigned c = 0x2d5c7c2f;
+ unsigned bpc, x, cyl, head, sec;
+
+ bpc = dsk.sec * dsk.head;
+ cyl = lba / bpc;
+ x = lba % bpc;
+ head = x / dsk.sec;
+ sec = x % dsk.sec;
+
+ if (!OPT_CHECK(RBX_QUIET)) {
+ xputc(c = c << 8 | c >> 24);
+ xputc('\b');
+ }
+ v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
+ v86.addr = READORG; /* call to read in boot1 */
+ v86.ecx = cyl;
+ v86.edx = (head << 8) | sec;
+ v86.edi = lba;
+ v86.ebx = 512;
+ v86.es = VTOPSEG(buf);
+ v86.ebp = VTOPOFF(buf);
+ v86int();
+ v86.ctl = V86_FLAGS;
+ if (V86_CY(v86.efl)) {
+ printf("error %u c/h/s %u/%u/%u lba %u\n", v86.eax >> 8 & 0xff,
+ cyl, head, sec, lba);
+ return -1;
+ }
+ return 0;
+}
+
+static inline void
+delay(void)
+{
+ int i;
+
+ i = 800;
+ do {
+ outb(0x5f, 0); /* about 600ns */
+ } while (--i >= 0);
+}
+
+static int
+keyhit(unsigned sec)
+{
+ unsigned i;
+
+ if (OPT_CHECK(RBX_NOINTR))
+ return 0;
+ for (i = 0; i < sec * 1000; i++) {
+ if (xgetc(1))
+ return 1;
+ delay();
+ }
+ return 0;
+}
+
+static int
+xputc(int c)
+{
+ if (DO_KBD)
+ putc(c);
+ if (DO_SIO)
+ sio_putc(c);
+ return c;
+}
+
+static int
+getc(int fn)
+{
+ v86.addr = 0x18;
+ v86.eax = fn << 8;
+ v86int();
+ if (fn)
+ return (v86.ebx >> 8) & 0x01;
+ else
+ return v86.eax & 0xff;
+}
+
+static int
+xgetc(int fn)
+{
+ if (OPT_CHECK(RBX_NOINTR))
+ return 0;
+ for (;;) {
+ if (DO_KBD && getc(1))
+ return fn ? 1 : getc(0);
+ if (DO_SIO && sio_ischar())
+ return fn ? 1 : sio_getc();
+ if (fn)
+ return 0;
+ }
+}
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