184ed5f988
Massive update. The highlights: o dramatically cut memory usage by writing better, less intertwingled code. o implement booting off mmc/sd cards (sd only tested one at the moment) o start to split out board specific stuff for boot2.
319 lines
6.7 KiB
C
319 lines
6.7 KiB
C
/*-
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* Copyright (c) 1998 Robert Nordier
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are freely
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* permitted provided that the above copyright notice and this
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* paragraph and the following disclaimer are duplicated in all
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* such forms.
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*
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* This software is provided "AS IS" and without any express or
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* implied warranties, including, without limitation, the implied
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* warranties of merchantability and fitness for a particular
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* purpose.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/disklabel.h>
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#include <sys/diskmbr.h>
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#include <sys/dirent.h>
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#include <sys/reboot.h>
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#include <machine/elf.h>
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#include <stdarg.h>
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#include "emac.h"
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#include "lib.h"
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#include "sd-card.h"
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#include "ee.h"
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#define RBX_ASKNAME 0x0 /* -a */
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#define RBX_SINGLE 0x1 /* -s */
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/* 0x2 is reserved for log2(RB_NOSYNC). */
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/* 0x3 is reserved for log2(RB_HALT). */
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/* 0x4 is reserved for log2(RB_INITNAME). */
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#define RBX_DFLTROOT 0x5 /* -r */
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/* #define RBX_KDB 0x6 -d */
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/* 0x7 is reserved for log2(RB_RDONLY). */
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/* 0x8 is reserved for log2(RB_DUMP). */
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/* 0x9 is reserved for log2(RB_MINIROOT). */
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#define RBX_CONFIG 0xa /* -c */
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#define RBX_VERBOSE 0xb /* -v */
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/* #define RBX_SERIAL 0xc -h */
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/* #define RBX_CDROM 0xd -C */
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/* 0xe is reserved for log2(RB_POWEROFF). */
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#define RBX_GDB 0xf /* -g */
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/* #define RBX_MUTE 0x10 -m */
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/* 0x11 is reserved for log2(RB_SELFTEST). */
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/* 0x12 is reserved for boot programs. */
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/* 0x13 is reserved for boot programs. */
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/* #define RBX_PAUSE 0x14 -p */
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/* #define RBX_QUIET 0x15 -q */
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/* #define RBX_NOINTR 0x1c -n */
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/* 0x1d is reserved for log2(RB_MULTIPLE) and is just misnamed here. */
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/* #define RBX_DUAL 0x1d -D */
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/* 0x1f is reserved for log2(RB_BOOTINFO). */
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/* pass: -a, -s, -r, -v, -g */
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#define RBX_MASK (OPT_SET(RBX_ASKNAME) | OPT_SET(RBX_SINGLE) | \
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OPT_SET(RBX_DFLTROOT) | \
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OPT_SET(RBX_VERBOSE) | \
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OPT_SET(RBX_GDB))
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#define PATH_CONFIG "/boot.config"
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//#define PATH_KERNEL "/boot/kernel/kernel"
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#define PATH_KERNEL "/kernel.gz.tramp"
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#define NOPT 5
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#define OPT_SET(opt) (1 << (opt))
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#define OPT_CHECK(opt) ((opts) & OPT_SET(opt))
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extern uint32_t _end;
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static const char optstr[NOPT] = "agrsv";
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static const unsigned char flags[NOPT] = {
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RBX_ASKNAME,
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RBX_GDB,
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RBX_DFLTROOT,
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RBX_SINGLE,
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RBX_VERBOSE
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};
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unsigned char mac[6] = { 0x42, 0x53, 0x44, 0, 0, 1 };
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unsigned dsk_start;
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static char cmd[512];
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static char kname[1024];
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static uint32_t opts;
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static int dsk_meta;
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static void load(void);
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static int parse(void);
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static int xfsread(ino_t, void *, size_t);
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static int dskread(void *, unsigned, unsigned);
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static int drvread(void *, unsigned, unsigned);
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#include "ufsread.c"
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static inline int
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xfsread(ino_t inode, void *buf, size_t nbyte)
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{
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if ((size_t)fsread(inode, buf, nbyte) != nbyte)
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return -1;
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return 0;
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}
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static inline void
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getstr(int c)
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{
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char *s;
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s = cmd;
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if (c)
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*s++ = c;
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for (;;) {
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c = getc(10000);
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switch (c = getc(10000)) {
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case 0:
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break;
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case '\177':
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case '\b':
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if (s > cmd) {
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s--;
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printf("\b \b");
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}
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break;
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case '\n':
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case '\r':
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*s = 0;
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return;
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default:
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if (s - cmd < sizeof(cmd) - 1)
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*s++ = c;
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xputchar(c);
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}
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}
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}
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// Each board has to provide one of these.
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void board_init(void);
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int
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main(void)
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{
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int autoboot, c = 0;
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ino_t ino;
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board_init();
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EMAC_Init();
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sdcard_init();
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EMAC_SetMACAddress(mac);
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dmadat = (void *)(0x20000000 + (16 << 20));
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/* Process configuration file */
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autoboot = 1;
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if ((ino = lookup(PATH_CONFIG)))
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fsread(ino, cmd, sizeof(cmd));
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if (*cmd) {
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if (parse())
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autoboot = 0;
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printf("%s: %s", PATH_CONFIG, cmd);
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/* Do not process this command twice */
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*cmd = 0;
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}
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/* Present the user with the boot2 prompt. */
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strcpy(kname, PATH_KERNEL);
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for (;;) {
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printf("\nDefault: %s\nboot: ", kname);
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if (!autoboot || (c = getc(2)) != -1)
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getstr(c);
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xputchar('\n');
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autoboot = 0;
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c = 0;
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printf("cmd is '%s'\n", cmd);
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if (parse())
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xputchar('\a');
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#ifdef XMODEM_DL
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else if (*cmd == '*')
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Update();
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else if (*cmd == '#')
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reset();
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#endif
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else
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load();
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}
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}
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static void
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load(void)
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{
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Elf32_Ehdr eh;
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static Elf32_Phdr ep[2];
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caddr_t p;
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ino_t ino;
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uint32_t addr;
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int i, j;
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if (!(ino = lookup(kname))) {
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if (!ls)
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printf("No %s\n", kname);
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return;
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}
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if (xfsread(ino, &eh, sizeof(eh)))
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return;
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if (!IS_ELF(eh)) {
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printf("Invalid %s\n", "format");
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return;
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}
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fs_off = eh.e_phoff;
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for (j = i = 0; i < eh.e_phnum && j < 2; i++) {
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if (xfsread(ino, ep + j, sizeof(ep[0])))
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return;
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if (ep[j].p_type == PT_LOAD)
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j++;
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}
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for (i = 0; i < 2; i++) {
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p = (caddr_t)ep[i].p_paddr;
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fs_off = ep[i].p_offset;
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if (xfsread(ino, p, ep[i].p_filesz))
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return;
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}
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addr = eh.e_entry;
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((void(*)(int))addr)(RB_BOOTINFO | (opts & RBX_MASK));
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}
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static int
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parse()
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{
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char *arg = cmd;
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char *ep, *p;
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int c, i;
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while ((c = *arg++)) {
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if (c == ' ' || c == '\t' || c == '\n')
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continue;
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for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
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ep = p;
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if (*p)
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*p++ = 0;
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if (c == '-') {
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while ((c = *arg++)) {
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for (i = 0; c != optstr[i]; i++)
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if (i == NOPT - 1)
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return -1;
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opts ^= OPT_SET(flags[i]);
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}
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} else {
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if ((i = ep - arg)) {
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if ((size_t)i >= sizeof(kname))
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return -1;
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memcpy(kname, arg, i + 1);
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}
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}
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arg = p;
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}
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return 0;
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}
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static int
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dskread(void *buf, unsigned lba, unsigned nblk)
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{
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struct dos_partition *dp;
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struct disklabel *d;
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char *sec;
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int i;
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if (!dsk_meta) {
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sec = dmadat->secbuf;
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dsk_start = 0;
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if (drvread(sec, DOSBBSECTOR, 1))
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return -1;
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dp = (void *)(sec + DOSPARTOFF);
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for (i = 0; i < NDOSPART; i++) {
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if (dp[i].dp_typ == DOSPTYP_386BSD)
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break;
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}
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if (i == NDOSPART)
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return -1;
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// Although dp_start is aligned within the disk partition structure,
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// DOSPARTOFF is 446, which is only word (2) aligned, not longword (4)
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// aligned. Cope by using memcpy to fetch the start of this partition.
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memcpy(&dsk_start, &dp[i].dp_start, 4);
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if (drvread(sec, dsk_start + LABELSECTOR, 1))
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return -1;
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d = (void *)(sec + LABELOFFSET);
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if (d->d_magic != DISKMAGIC || d->d_magic2 != DISKMAGIC) {
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printf("Invalid %s\n", "label");
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return -1;
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}
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if (!d->d_partitions[0].p_size) {
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printf("Invalid %s\n", "partition");
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return -1;
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}
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dsk_start += d->d_partitions[0].p_offset;
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dsk_start -= d->d_partitions[RAW_PART].p_offset;
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dsk_meta++;
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}
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return drvread(buf, dsk_start + lba, nblk);
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}
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static int
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drvread(void *buf, unsigned lba, unsigned nblk)
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{
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static unsigned c = 0x2d5c7c2f;
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printf("%c\b", c = c << 8 | c >> 24);
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return (MCI_read((char *)buf, lba << 9, nblk << 9));
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}
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