1 /* $NetBSD: mips.c,v 1.1 1999/09/26 02:42:50 takemura Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 Shin Takemura. 5 * All rights reserved. 6 * 7 * This software is part of the PocketBSD. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the PocketBSD project 20 * and its contributors. 21 * 4. Neither the name of the project nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 */ 38 #include <pbsdboot.h> 39 40 int 41 mips_boot(caddr_t map) 42 { 43 unsigned char *mem; 44 unsigned long jump_instruction, phys_mem; 45 46 /* 47 * allocate physical memory for startup program. 48 */ 49 if ((mem = (unsigned char*)vmem_alloc()) == NULL) { 50 debug_printf(TEXT("can't allocate final page.\n")); 51 msg_printf(MSG_ERROR, whoami, TEXT("can't allocate root page.\n")); 52 return (-1); 53 } 54 55 /* 56 * copy startup program code 57 */ 58 memcpy(mem, system_info.si_asmcode, system_info.si_asmcodelen); 59 60 /* 61 * set map address (override target field ofasmcode 62 * "lui a0, 0x0; ori a0, 0x0;". 63 */ 64 *(unsigned short*)&mem[0] = (unsigned short)(((long)map) >> 16); 65 *(unsigned short*)&mem[4] = (unsigned short)map; 66 67 /* 68 * construct start instruction 69 */ 70 phys_mem = (unsigned long)vtophysaddr(mem); 71 jump_instruction = (0x08000000 | ((phys_mem >> 2) & 0x03ffffff)); 72 73 /* 74 * map interrupt vector 75 */ 76 mem = (unsigned char*)VirtualAlloc(0, 0x400, MEM_RESERVE, PAGE_NOACCESS); 77 VirtualCopy((LPVOID)mem, (LPVOID)(system_info.si_dramstart >> 8), 0x400, 78 PAGE_READWRITE | PAGE_NOCACHE | PAGE_PHYSICAL); 79 /* 80 * GO ! 81 */ 82 *(unsigned long*)&mem[0x0] = jump_instruction; 83 84 return (0); /* not reachable */ 85 } 86