/* $OpenBSD: loadbsd.c,v 1.14 2000/06/07 15:39:24 espie Exp $ */ /* $NetBSD: loadbsd.c,v 1.22 1996/10/13 13:39:52 is Exp $ */ /* * Copyright (c) 1994 Michael L. Hitch * 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 Michael L. Hitch. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ #include #include #include #include #include #include #include #include #include #include #include #if defined(__NetBSD__) || defined (__OpenBSD__) #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include /* Get definitions for boothowto */ #include "reboot.h" #undef __LDPGSZ #define __LDPGSZ 8192 #if !defined(__NetBSD__) && !defined(__OpenBSD__) #ifndef __P #ifdef __STDC__ #define __P(x) x #else #define __P(x) #endif #endif void err __P((int, const char *, ...)); void errx __P((int, const char *, ...)); void warn __P((const char *, ...)); void warnx __P((const char *, ...)); #endif extern const char _version[]; /* * Version history: * 1.x Kernel startup interface version check. * 2.0 Added symbol table end address and symbol table support. * 2.1 03/23/94 - Round up end of fastram segment. * Check fastram segment size for minimum of 2M. * Use largest segment of highest priority if -p option. * Print out fastram size in KB if not a multiple of MB. * 2.2 03/24/94 - Zero out all unused registers. * Started version history comment. * 2.3 04/26/94 - Added -D option to enter debugger on boot. * 2.4 04/30/94 - Cpuid includes base machine type. * Also check if CPU is capable of running OpenBSD. * 2.5 05/17/94 - Add check for "A3000 bonus". * 2.6 06/05/94 - Added -c option to override machine type. * 2.7 06/15/94 - Pass E clock frequency. * 2.8 06/22/94 - Fix supervisor stack usage. * 2.9 06/26/94 - Use PAL flag for E clock freq on pre 2.0 WB * Added AGA enable parameter * 2.10 12/22/94 - Use FindResident() & OpenResource() for machine * type detection. * Add -n flag & option for non-contiguous memory. * 01/28/95 - Corrected -n on usage & help messages. * 2.11 03/12/95 - Check kernel size against chip memory size. * 2.12 11/11/95 - Add -I option to inhibit synchronous transfer * 11/12/95 - New kernel startup interface version - to * support loading kernel image to fastmem rather than chipmem. * 2.13 04/15/96 - Direct load to fastmem. * Add -Z flag to force chipmem load. * Moved test mode exit to later - kernel image is created * and startup interface version checked in test mode. * Add -s flag for compatibility to bootblock loader. * 05/02/96 - Add a maximum startup interface version level * to allow future kernel compatibility. * 2.14 06/26/96 is - Add first version of kludges needed to * boot on DraCos. This can probably be done a bit more cleanly * using TTRs, but it works for now. * 2.15 07/28/96 is - Add first version of kludges needed to * get FusionForty kickrom'd memory back. Hope this doesn't * break anything else. * * 2.13.1 OpenBSD branch: changed old -c to -C so new -c can be the * architecture-independent bootflag for user-controlled * startup configuration. * 2.15.1 Merge of changes from 2.13 -> 2.15 * 2.15.2 03/30/98 ME - generic dust-off for amigaos compilation, * turn on -Wall, clean up warnings. Be sensical about * ixemul/libnix issues. * 2.15.3 07/18/98 ME - poolmem awareness * 2.15.4 06/07/00 ME - change defaults to be less confusing */ /* * Kernel startup interface version * 1: first version of loadbsd * 2: needs esym location passed in a4 * 3: load kernel image into fastmem rather than chipmem * MAX: highest version with backward compatibility. */ #define KERNEL_STARTUP_VERSION 3 #define KERNEL_STARTUP_VERSION_MAX 9 #define DRACOREVISION (*(UBYTE *)0x02000009) #define DRACOMMUMARGIN 0x200000 #define MAXMEMSEG 16 struct boot_memlist { u_int m_nseg; /* num_mem; */ struct boot_memseg { u_int ms_start; u_int ms_size; u_short ms_attrib; short ms_pri; } m_seg[MAXMEMSEG]; }; struct boot_memlist memlist; struct boot_memlist *kmemlist; void get_mem_config __P((void **, u_long *, u_long *)); void get_cpuid __P((void)); void get_eclock __P((void)); void get_AGA __P((void)); void usage __P((void)); void verbose_usage __P((void)); void Version __P((void)); void startit __P((void *, u_long, u_long, void *, u_long, u_long, int, void *, int, int, u_long, u_long, int)); void startit_end __P((void)); extern void open_libraries __P((void)); extern void ensure_no_poolmem __P((void)); extern struct ExecBase *SysBase; extern char *optarg; extern int optind; int k_flag; int p_flag; int t_flag; int reqmemsz; int S_flag = 1; u_long I_flag; int Z_flag; u_long cpuid; long eclock_freq; long amiga_flags; char *program_name; char *kname; /* let autoopen do its job */ extern struct ExpansionBase *ExpansionBase; extern struct GfxBase *GfxBase; u_char *kp; int ksize; int main(argc, argv) int argc; char **argv; { struct exec e; struct ConfigDev *cd, *kcd; u_long fmemsz, cmemsz; int fd, boothowto, textsz, stringsz, ncd, i, mem_ix, ch; u_short *kvers; int *nkcd; void *fmem; char *esym; void (*start_it) __P((void *, u_long, u_long, void *, u_long, u_long, int, void *, int, int, u_long, u_long, int)) = startit; program_name = argv[0]; boothowto = RB_AUTOBOOT; open_libraries(); while ((ch = getopt(argc, argv, "aAbcC:DhI:km:n:ptsRSVZ")) != -1) { switch (ch) { case 'k': k_flag = 1; break; case 'a': boothowto &= ~(RB_SINGLE); boothowto |= RB_AUTOBOOT; break; case 'b': boothowto |= RB_ASKNAME; break; case 'c': boothowto |= RB_CONFIG; break; case 'p': p_flag = 1; break; case 't': t_flag = 1; break; case 'm': reqmemsz = atoi(optarg) * 1024; break; case 's': boothowto &= ~(RB_AUTOBOOT); boothowto |= RB_SINGLE; break; case 'V': fprintf(stderr,"%s\n",_version + 6); break; case 'R': S_flag = 0; break; case 'S': S_flag = 1; break; case 'D': boothowto |= RB_KDB; break; case 'C': cpuid = atoi(optarg) << 16; break; case 'A': amiga_flags |= 1; break; case 'n': i = atoi(optarg); if (i >= 0 && i <= 3) amiga_flags |= i << 1; else err(20, "-n option must be 0, 1, 2, or 3"); break; case 'I': I_flag = strtoul(optarg, NULL, 16); break; case 'Z': Z_flag = 1; break; case 'h': verbose_usage(); default: usage(); } } argc -= optind; argv += optind; if (argc == 1) kname = argv[0]; else if (argc == 0) kname = "bsd"; else usage(); if ((fd = open(kname, 0)) < 0) err(20, "open"); if (read(fd, &e, sizeof(e)) != sizeof(e)) err(20, "reading exec"); if (e.a_magic != NMAGIC) err(20, "unknown binary"); for (cd = 0, ncd = 0; ( cd = FindConfigDev(cd, -1, -1) ); ncd++) ; get_cpuid(); ensure_no_poolmem(); get_mem_config(&fmem, &fmemsz, &cmemsz); get_eclock(); get_AGA(); textsz = (e.a_text + __LDPGSZ - 1) & (-__LDPGSZ); esym = NULL; ksize = textsz + e.a_data + e.a_bss + ncd * sizeof(*cd) + 4 + memlist.m_nseg * sizeof(struct boot_memseg) + 4; /* * get symbol table size & string size * (should check kernel version to see if it will handle it) */ if (S_flag && e.a_syms) { if (lseek(fd, e.a_text + e.a_data + e.a_syms, SEEK_CUR) <= 0 || read(fd, &stringsz, 4) != 4 || lseek(fd, sizeof(e), SEEK_SET) < 0) err(20, "lseek for symbols"); ksize += e.a_syms + 4 + ((stringsz + 3) & ~3); } kp = (u_char *)AllocMem(ksize + ((char *)startit_end - (char *)startit) + 256, MEMF_FAST|MEMF_REVERSE); if (t_flag) { for (i = 0; i < memlist.m_nseg; ++i) { printf("mem segment %d: start=%08x size=%08x" " attribute=%04x pri=%d\n", i + 1, memlist.m_seg[i].ms_start, memlist.m_seg[i].ms_size, memlist.m_seg[i].ms_attrib, memlist.m_seg[i].ms_pri); } printf("kernel size: %d\n", ksize); } if (kp == NULL) err(20, "failed malloc %d\n", ksize); if (read(fd, kp, e.a_text) != e.a_text || read(fd, kp + textsz, e.a_data) != e.a_data) err(20, "unable to read kernel image\n"); if (k_flag) { fmem += 4 * 1024 * 1024; fmemsz -= 4 * 1024 * 1024; } if (reqmemsz && reqmemsz <= fmemsz) fmemsz = reqmemsz; if (boothowto & RB_AUTOBOOT) printf("Autobooting..."); if (boothowto & RB_ASKNAME) printf("Askboot..."); printf("Using %ld%c FASTMEM at 0x%p, %ldM CHIPMEM\n", (fmemsz & 0xfffff) ? fmemsz >> 10 : fmemsz >> 20, (fmemsz & 0xfffff) ? 'K' : 'M', fmem, cmemsz >> 20); kvers = (u_short *)(kp + e.a_entry - 2); if (*kvers > KERNEL_STARTUP_VERSION_MAX && *kvers != 0x4e73) err(20, "newer loadbsd required: %d\n", *kvers); if (*kvers > KERNEL_STARTUP_VERSION) { printf("****************************************************\n"); printf("*** Notice: this kernel has features which require\n"); printf("*** a newer version of loadbsd. To allow the use of\n"); printf("*** any newer features or capabilities, you should\n"); printf("*** update to a newer version of loadbsd\n"); printf("****************************************************\n"); sleep(3); /* even more time to see that message */ } if ((cpuid & AFB_68020) == 0) err(20, "cpu not supported"); /* * give them a chance to read the information... */ sleep(2); bzero(kp + textsz + e.a_data, e.a_bss); /* * If symbols wanted (and kernel can handle them), * load symbol table & strings and set esym to end. */ nkcd = (int *)(kp + textsz + e.a_data + e.a_bss); if (*kvers != 0x4e73 && *kvers > 1 && S_flag && e.a_syms) { *nkcd++ = e.a_syms; read(fd, (char *)nkcd, e.a_syms); nkcd = (int *)((char *)nkcd + e.a_syms); read(fd, (char *)nkcd, stringsz); nkcd = (int*)((char *)nkcd + ((stringsz + 3) & ~3)); esym = (char *)(textsz + e.a_data + e.a_bss + e.a_syms + 4 + ((stringsz + 3) & ~3)); } *nkcd = ncd; kcd = (struct ConfigDev *)(nkcd + 1); while( (cd = FindConfigDev(cd, -1, -1)) ) { *kcd = *cd; if (((cpuid >> 24) == 0x7d) && ((u_long)kcd->cd_BoardAddr < 0x1000000)) { if (t_flag) printf("Transformed Z2 device from %8p ", kcd->cd_BoardAddr); kcd->cd_BoardAddr += 0x3000000; if (t_flag) printf("to %8p\n", kcd->cd_BoardAddr); } ++kcd; } kmemlist = (struct boot_memlist *)kcd; kmemlist->m_nseg = memlist.m_nseg; for (mem_ix = 0; mem_ix < memlist.m_nseg; mem_ix++) kmemlist->m_seg[mem_ix] = memlist.m_seg[mem_ix]; if (*kvers > 2 && Z_flag == 0) { /* * Kernel supports direct load to fastmem, and the -Z * option was not specified. Copy startup code to end * of kernel image and set start_it. */ if ((void *)kp < fmem) { printf("Kernel at %8p, Fastmem used at %8p\n", kp, fmem); errx(20, "Can't copy upwards yet.\nDefragment your memory and try again OR try the -p OR try the -Z options."); } memcpy(kp + ksize + 256, (char *)startit, (char *)startit_end - (char *)startit); CacheClearU(); start_it = (void (*)())kp + ksize + 256; printf("*** Loading from %8p to Fastmem %8p ***\n", kp, fmem); sleep(2); } else { /* * Either the kernel doesn't suppport loading directly to * fastmem or the -Z flag was given. Verify kernel image * fits into chipmem. */ if (ksize >= cmemsz) { printf("Kernel size %d exceeds Chip Memory of %ld\n", ksize, cmemsz); err(20, "Insufficient Chip Memory for kernel"); } Z_flag = 1; printf("*** Loading from %8p to Chipmem ***\n", kp); } /* * if test option set, done */ if (t_flag) { if (kp) FreeMem(kp, ksize + ((char *)startit_end - (char *)startit) + 256); exit(0); } /* * XXX AGA startup - may need more */ LoadView(NULL); /* Don't do this if AGA active? */ start_it(kp, ksize, e.a_entry, fmem, fmemsz, cmemsz, boothowto, esym, cpuid, eclock_freq, amiga_flags, I_flag, Z_flag == 0); /*NOTREACHED*/ } void get_mem_config(fmem, fmemsz, cmemsz) void **fmem; u_long *fmemsz, *cmemsz; { struct MemHeader *mh, *nmh; u_int segsz, seg, eseg, nmem, nseg, nsegsz; /* u_int tseg, tsegsz; unused */ char mempri; nmem = 0; mempri = -128; *fmemsz = 0; *cmemsz = 0; /* * walk thru the exec memory list */ Forbid(); for (mh = (void *) SysBase->MemList.lh_Head; (nmh = (void *) mh->mh_Node.ln_Succ); mh = nmh) { nseg = (u_int)mh->mh_Lower; nsegsz = (u_int)mh->mh_Upper - nseg; segsz = nsegsz; seg = (u_int)CachePreDMA((APTR)nseg, (LONG *)&segsz, 0L); nsegsz -= segsz, nseg += segsz; for (;segsz; segsz = nsegsz, seg = (u_int)CachePreDMA((APTR)nseg, (LONG *)&segsz, DMA_Continue), nsegsz -= segsz, nseg += segsz, ++nmem) { if (t_flag) printf("Translated %08x sz %08x to %08x sz %08x\n", nseg - segsz, nsegsz + segsz, seg, segsz); eseg = seg + segsz; if ((cpuid >> 24) == 0x7D) { /* DraCo MMU table kludge */ segsz = ((segsz -1) | 0xfffff) + 1; seg = eseg - segsz; /* * Only use first SIMM to boot; we know it is VA==PA. * Enter into table and continue. Yes, * this is ugly. */ if (seg != 0x40000000) { memlist.m_seg[nmem].ms_attrib = mh->mh_Attributes; memlist.m_seg[nmem].ms_pri = mh->mh_Node.ln_Pri; memlist.m_seg[nmem].ms_size = segsz; memlist.m_seg[nmem].ms_start = seg; ++nmem; continue; } memlist.m_seg[nmem].ms_attrib = mh->mh_Attributes; memlist.m_seg[nmem].ms_pri = mh->mh_Node.ln_Pri; memlist.m_seg[nmem].ms_size = DRACOMMUMARGIN; memlist.m_seg[nmem].ms_start = seg; ++nmem; seg += DRACOMMUMARGIN; segsz -= DRACOMMUMARGIN; } memlist.m_seg[nmem].ms_attrib = mh->mh_Attributes; memlist.m_seg[nmem].ms_pri = mh->mh_Node.ln_Pri; memlist.m_seg[nmem].ms_size = segsz; memlist.m_seg[nmem].ms_start = seg; if ((mh->mh_Attributes & (MEMF_CHIP|MEMF_FAST)) == MEMF_CHIP) { /* * there should hardly be more than one entry for * chip mem, but handle it the same nevertheless * cmem always starts at 0, so include vector area */ memlist.m_seg[nmem].ms_start = seg = 0; /* * round to multiple of 512K */ segsz = (segsz + 512 * 1024 - 1) & -(512 * 1024); memlist.m_seg[nmem].ms_size = segsz; if (segsz > *cmemsz) *cmemsz = segsz; continue; } /* * some heuristics.. */ seg &= -__LDPGSZ; eseg = (eseg + __LDPGSZ - 1) & -__LDPGSZ; /* * get the mem back stolen by incore kickstart on * A3000 with V36 bootrom. */ if (eseg == 0x07f80000) eseg = 0x08000000; /* * or by zkick on a A2000. */ if (seg == 0x280000 && strcmp(mh->mh_Node.ln_Name, "zkick memory") == 0) seg = 0x200000; /* * or by Fusion Forty fastrom */ if ((seg & ~(1024*1024-1)) == 0x11000000) { /* * XXX we should test the name. * Unfortunately, the memory is just called * "32 bit memory" which isn't very specific. */ seg = 0x11000000; } segsz = eseg - seg; memlist.m_seg[nmem].ms_start = seg; memlist.m_seg[nmem].ms_size = segsz; /* * If this segment is smaller than 2M, * don't use it to load the kernel */ if (segsz < 2 * 1024 * 1024) continue; /* * if p_flag is set, select memory by priority * instead of size */ if ((!p_flag && segsz > *fmemsz) || (p_flag && mempri <= mh->mh_Node.ln_Pri && segsz > *fmemsz)) { *fmemsz = segsz; *fmem = (void *)seg; mempri = mh->mh_Node.ln_Pri; } } } memlist.m_nseg = nmem; Permit(); } /* * Try to determine the machine ID by searching the resident module list * for modules only present on specific machines. (Thanks, Bill!) */ void get_cpuid() { #if 0 /* unused */ u_long *rl; struct Resident *rm; struct Node *rn; /* Resource node entry */ #endif cpuid |= SysBase->AttnFlags; /* get FPU and CPU flags */ if (cpuid & 0xffff0000) { if ((cpuid & 0xff000000) == 0x7D) return; switch (cpuid >> 16) { case 500: case 600: case 1000: case 1200: case 2000: case 3000: case 4000: return; default: printf("machine Amiga %ld is not recognized\n", cpuid >> 16); exit(1); } } if (FindResident("A4000 Bonus") || FindResident("A4000 bonus") || FindResident("A1000 Bonus")) cpuid |= 4000 << 16; else if (FindResident("A3000 Bonus") || FindResident("A3000 bonus")) cpuid |= 3000 << 16; else if (OpenResource("card.resource")) { /* Test for AGA? */ cpuid |= 1200 << 16; } else if (OpenResource("draco.resource")) { cpuid |= (32000 | DRACOREVISION) << 16; } /* * Nothing found, it's probably an A2000 or A500 */ if ((cpuid >> 16) == 0) cpuid |= 2000 << 16; } void get_eclock() { #if 0 /* XXX not called for, unless you manage to get libnix/ixemul to work under <2.0 */ /* Fix for 1.3 startups? */ if (SysBase->LibNode.lib_Version > 36) #endif eclock_freq = SysBase->ex_EClockFrequency; #if 0 else eclock_freq = (GfxBase->DisplayFlags & PAL) ? 709379 : 715909; #endif } void get_AGA() { /* * Determine if an AGA mode is active */ } asm(" .set ABSEXECBASE,4 .text .globl _startit _startit: movel sp,a3 movel 4:w,a6 lea pc@(start_super),a5 jmp a6@(-0x1e) | supervisor-call start_super: movew #0x2700,sr | the BSD kernel wants values into the following registers: | a0: fastmem-start | d0: fastmem-size | d1: chipmem-size | d3: Amiga specific flags | d4: E clock frequency | d5: AttnFlags (cpuid) | d7: boothowto | a4: esym location | a2: Inhibit sync flags | All other registers zeroed for possible future requirements. lea pc@(_startit),sp | make sure we have a good stack *** movel a3@(4),a1 | loaded kernel movel a3@(8),d2 | length of loaded kernel | movel a3@(12),sp | entry point in stack pointer movel a3@(12),a6 | push entry point *** movel a3@(16),a0 | fastmem-start movel a3@(20),d0 | fastmem-size movel a3@(24),d1 | chipmem-size movel a3@(28),d7 | boothowto movel a3@(32),a4 | esym movel a3@(36),d5 | cpuid movel a3@(40),d4 | E clock frequency movel a3@(44),d3 | Amiga flags movel a3@(48),a2 | Inhibit sync flags movel a3@(52),d6 | Load to fastmem flag subl a5,a5 | target, load to 0 cmpb #0x7D,a3@(36) | is it DraCo? beq nott | yes, switch off MMU later | no, it is an Amiga: | movew #0xf00,0xdff180 |red | moveb #0,0x200003c8 | moveb #63,0x200003c9 | moveb #0,0x200003c9 | moveb #0,0x200003c9 movew #(1<<9),0xdff096 | disable DMA on Amigas. | ------ mmu off start ----- btst #3,d5 | AFB_68040,SysBase->AttnFlags beq not040 | Turn off 68040/060 MMU subl a3,a3 .word 0x4e7b,0xb003 | movec a3,tc .word 0x4e7b,0xb806 | movec a3,urp .word 0x4e7b,0xb807 | movec a3,srp .word 0x4e7b,0xb004 | movec a3,itt0 .word 0x4e7b,0xb005 | movec a3,itt1 .word 0x4e7b,0xb006 | movec a3,dtt0 .word 0x4e7b,0xb007 | movec a3,dtt1 bra nott not040: lea pc@(zero),a3 pmove a3@,tc | Turn off MMU lea pc@(nullrp),a3 pmove a3@,crp | Turn off MMU some more pmove a3@,srp | Really, really, turn off MMU | Turn off 68030 TT registers btst #2,d5 | AFB_68030,SysBase->AttnFlags beq nott | Skip TT registers if not 68030 lea pc@(zero),a3 .word 0xf013,0x0800 | pmove a3@,tt0 (gas only knows about 68851 ops..) .word 0xf013,0x0c00 | pmove a3@,tt1 (gas only knows about 68851 ops..) nott: | ---- mmu off end ---- | movew #0xf60,0xdff180 | orange | moveb #0,0x200003c8 | moveb #63,0x200003c9 | moveb #24,0x200003c9 | moveb #0,0x200003c9 | ---- copy kernel start ---- tstl d6 | Can we load to fastmem? beq L0 | No, leave destination at 0 movl a0,a5 | Move to start of fastmem chunk addl a0,a6 | relocate kernel entry point L0: movl a1@+,a5@+ subl #4,d2 bcc L0 lea pc@(ckend:w),a1 movl a5,sp@- movl #_startit_end - ckend,d2 L2: movl a1@+,a5@+ subl #4,d2 bcc L2 btst #3,d5 jeq L1 .word 0xf4f8 L1: movql #0,d2 | switch off cache to ensure we use movec d2,cacr | valid kernel data | movew #0xFF0,0xdff180 | yellow | moveb #0,0x200003c8 | moveb #63,0x200003c9 | moveb #0,0x200003c9 | moveb #0,0x200003c9 rts | ---- copy kernel end ---- ckend: | movew #0x0ff,0xdff180 | petrol | moveb #0,0x200003c8 | moveb #0,0x200003c9 | moveb #63,0x200003c9 | moveb #63,0x200003c9 movl d5,d2 roll #8,d2 cmpb #0x7D,d2 jne noDraCo | DraCo: switch off MMU now: subl a3,a3 .word 0x4e7b,0xb003 | movec a3,tc .word 0x4e7b,0xb806 | movec a3,urp .word 0x4e7b,0xb807 | movec a3,srp .word 0x4e7b,0xb004 | movec a3,itt0 .word 0x4e7b,0xb005 | movec a3,itt1 .word 0x4e7b,0xb006 | movec a3,dtt0 .word 0x4e7b,0xb007 | movec a3,dtt1 noDraCo: moveq #0,d2 | zero out unused registers moveq #0,d6 | (might make future compatibility movel d6,a1 | would have known contents) movel d6,a3 movel d6,a5 movel a6,sp | entry point into stack pointer movel d6,a6 | movew #0x0F0,0xdff180 | green | moveb #0,0x200003c8 | moveb #0,0x200003c9 | moveb #63,0x200003c9 | moveb #0,0x200003c9 jmp sp@ | jump to kernel entry point | A do-nothing MMU root pointer (includes the following long as well) nullrp: .long 0x7fff0001 zero: .long 0 _startit_end: "); void usage() { fprintf(stderr, "usage: %s [-abchkpstADRSVZ] [-C machine] [-m mem] [-n mode]\n", program_name); fprintf(stderr," [-I sync-inhibit] [kernel]\n"); exit(1); } void verbose_usage() { fprintf(stderr, " NAME \t%s - loads OpenBSD from amiga dos. SYNOPSIS \t%s [-abchkpstADRSVZ] [-C machine] [-m mem] [-n flags] \t [-I sync-inhibit] kernel OPTIONS \t-a Boot up to multiuser mode (default). \t-A Use AGA display mode, if available. \t-b Ask for which root device. \t Its possible to have multiple roots and choose between them. \t-c Enter user-controlled startup-configuration mode. \t-C Set machine type. [e.g 3000; use 32000+N for DraCo rev. N] \t-D Enter debugger \t-h This help message. \t-I Inhibit sync negotiation. Option value is bit-encoded targets. \t-k Reserve the first 4M of fast mem [Some one else \t is going to have to answer what that it is used for]. \t-m Tweak amount of available memory, for finding minimum amount \t of memory required to run. Sets fastmem size to specified \t size in Kbytes. \t-n Enable multiple non-contiguous memory: value = 0 (disabled), \t 1 (two segments), 2 (all avail segments), 3 (same as 2?). \t-p Use highest priority fastmem segement instead of the largest \t segment. The higher priority segment is usually faster \t (i.e. 32 bit memory), but some people have smaller amounts \t of 32 bit memory. \t-s Boot up in singleuser mode. \t-R Remove kernel symbol table. \t-S Include kernel symbol table (default). \t-t This is a *test* option. It prints out the memory \t list information being passed to the kernel and also \t exits without actually starting OpenBSD. \t-V Version of loadbsd program. \t-Z Force kernel load to chipmem. HISTORY \tThis version supports Kernel version 720 +\n", program_name, program_name); exit(1); } void _Vdomessage(doexit, eval, doerrno, fmt, args) int doexit, doerrno, eval; const char *fmt; va_list args; { fprintf(stderr, "%s: ", program_name); if (fmt) { vfprintf(stderr, fmt, args); fprintf(stderr, ": "); } if (doerrno && errno < sys_nerr) { fprintf(stderr, "%s", strerror(errno)); #if 0 if (errno == EINTR || errno == 0) { int sigs; sigpending((sigset_t *)&sigs); printf("%x\n", sigs); } #endif } fprintf(stderr, "\n"); if (doexit) { if (kp) FreeMem(kp, ksize + ((char *)startit_end - (char *)startit) + 256); exit(eval); } } void err(int eval, const char *fmt, ...) { va_list ap; va_start(ap, fmt); _Vdomessage(1, eval, 1, fmt, ap); /*NOTREACHED*/ } void errx(int eval, const char *fmt, ...) { va_list ap; va_start(ap, fmt); _Vdomessage(1, eval, 0, fmt, ap); /*NOTREACHED*/ } void warn(const char *fmt, ...) { va_list ap; va_start(ap, fmt); _Vdomessage(0, 0, 1, fmt, ap); va_end(ap); } void warnx(const char *fmt, ...) { va_list ap; va_start(ap, fmt); _Vdomessage(0, 0, 0, fmt, ap); va_end(ap); }