#define DEBUG /* $NetBSD: boot.c,v 1.10 2021/08/20 20:25:27 andvar Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (C) 1995, 1996 Wolfgang Solfrank. * Copyright (C) 1995, 1996 TooLs GmbH. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by TooLs GmbH. * 4. The name of TooLs GmbH may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * First try for the boot code * * Input syntax is: * [promdev[{:|,}partition]]/[filename] [flags] */ #define ELFSIZE 32 /* We use 32-bit ELF. */ #include <sys/param.h> #include <sys/exec.h> #include <sys/exec_elf.h> #include <sys/reboot.h> #include <sys/disklabel.h> #include <sys/boot_flag.h> #include <lib/libsa/stand.h> #include <lib/libsa/loadfile.h> #include <lib/libkern/libkern.h> #include <machine/cpu.h> #include "cache.h" #include "extern.h" #include "ofdev.h" #include "openfirm.h" #ifdef DEBUG # define DPRINTF printf #else # define DPRINTF while (/*CONSTCOND*/0) printf #endif char bootdev[128]; char bootfile[128]; int boothowto; int debug; #ifdef notyet static int ofw_version = 0; #endif static const char *kernels[] = { "/netbsd", "/netbsd.gz", "/netbsd.shark", NULL }; static void prom2boot(char *dev) { char *cp, *ocp; ocp = dev; cp = dev + strlen(dev) - 1; for (; cp >= ocp; cp--) { if (*cp == ':') { *cp = '\0'; return; } } } static void parseargs(char *str, int *howtop) { char *cp; /* Allow user to drop back to the PROM. */ if (strcmp(str, "exit") == 0) OF_exit(); *howtop = 0; for (cp = str; *cp; cp++) if (*cp == ' ' || *cp == '-') goto found; return; found: *cp++ = '\0'; while (*cp) BOOT_FLAG(*cp++, *howtop); } static void chain(void (*entry)(int (*)(void *), void *, u_int), char *args, void *ssym, void *esym) { extern char end[]; u_int l, magic = 0x19730224; freeall(); /* * Stash pointer to start and end of symbol table after the argument * strings. */ l = strlen(args) + 1; l = (l + 3) & ~3; /* align */ DPRINTF("magic @ %p\n", args + l); memcpy(args + l, &magic, sizeof(magic)); l += sizeof(magic); DPRINTF("ssym @ %p\n", args + l); memcpy(args + l, &ssym, sizeof(ssym)); l += sizeof(ssym); DPRINTF("esym @ %p\n", args + l); memcpy(args + l, &esym, sizeof(esym)); l += sizeof(esym); DPRINTF("args + l -> %p\n", args + l); DPRINTF("Calling OF_chain(%p, %tx, %p, %p, %u)\n", (void *)RELOC, end - (char *)RELOC, entry, args, l); OF_chain((void *)RELOC, end - (char *)RELOC, entry, args, l); panic("chain"); } __dead void _rtt(void) { OF_exit(); } void main(void) { extern char bootprog_name[], bootprog_rev[]; int chosen; char bootline[512]; /* Should check size? */ char *cp, *startbuf, *endbuf; u_long marks[MARK_MAX], size; u_int32_t entry; void *ssym, *esym; printf("\n"); printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); /* * Get the boot arguments from Openfirmware */ if ((chosen = OF_finddevice("/chosen")) == -1 || OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { printf("Invalid Openfirmware environment\n"); OF_exit(); } prom2boot(bootdev); parseargs(bootline, &boothowto); DPRINTF("bootline=%s\n", bootline); /* * Per the ARM OpenFirmware bindings, the firmware must * allocate and map at least 6MB of physical memory starting * at VA 0xf0000000. We have been loaded at 0xf0000000, * and the memory after us has been unmapped and freed. * We expect to load the kernel at 0xf0100000, so we will * allocate 5MB of virtual memory starting there, and * unmap/free what we don't use. */ startbuf = OF_claim((void *) 0xf0100000, (5 * 1024 * 1024), 0); if (startbuf != (void *) 0xf0100000) { printf("Unable to claim buffer for kernel\n"); OF_exit(); } endbuf = startbuf + (5 * 1024 * 1024); for (;;) { int i; if (boothowto & RB_ASKNAME) { printf("Boot: "); kgets(bootline, sizeof(bootline)); parseargs(bootline, &boothowto); } if (bootline[0]) { kernels[0] = bootline; kernels[1] = NULL; } for (i = 0; kernels[i]; i++) { DPRINTF("Trying %s\n", kernels[i]); marks[MARK_START] = 0xf0100000; if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0) goto loaded; } boothowto |= RB_ASKNAME; } loaded: /* * Okay, kernel is loaded, free the extra memory at the end. * Round to the ARM OpenFirmware page size (4k). */ cp = (char *) ((marks[MARK_END] + 0xfff) & ~0xfff); size = (u_long) (endbuf - cp); if (size) OF_release(cp, size); #ifdef __notyet__ OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); cp = bootline; #else strcpy(bootline, opened_name); cp = bootline + strlen(bootline); *cp++ = ' '; #endif *cp = '-'; if (boothowto & RB_ASKNAME) *++cp = 'a'; if (boothowto & RB_SINGLE) *++cp = 's'; if (boothowto & RB_KDB) *++cp = 'd'; if (*cp == '-') #ifdef __notyet__ *cp = 0; #else *--cp = 0; #endif else *++cp = 0; #ifdef __notyet__ OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); #endif entry = marks[MARK_ENTRY]; ssym = (void *)marks[MARK_SYM]; esym = (void *)marks[MARK_END]; printf(" start=0x%x\n", entry); if (cache_syncI != NULL) { DPRINTF("Syncing I$...\n"); (*cache_syncI)(); } chain((void *)entry, bootline, ssym, esym); OF_exit(); }
