exec.c revision 1.2.2.2
1 /* $NetBSD: exec.c,v 1.2.2.2 2006/04/22 11:37:39 simonb Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 /* 40 * Copyright (c) 1992, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * Ralph Campbell. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)boot.c 8.1 (Berkeley) 6/10/93 71 */ 72 73 #include <sys/cdefs.h> 74 75 #include <lib/libsa/stand.h> 76 #include <lib/libsa/loadfile.h> 77 78 #include <sys/param.h> 79 #include <sys/lock.h> 80 81 #include <machine/elf_machdep.h> 82 #include <machine/bootinfo.h> 83 #include <machine/ia64_cpu.h> 84 #include <machine/pte.h> 85 #include <machine/vmparam.h> 86 87 #include <efi.h> 88 #include <efilib.h> 89 90 #include "bootstrap.h" 91 92 #define _KERNEL 93 94 static int elf64_exec(struct preloaded_file *amp); 95 96 struct file_format ia64_elf = { elf64_loadfile, elf64_exec }; 97 98 static __inline u_int64_t 99 disable_ic() 100 { 101 u_int64_t psr; 102 __asm __volatile("mov %0=psr;;" : "=r" (psr)); 103 __asm __volatile("rsm psr.ic|psr.i;; srlz.i;;"); 104 return psr; 105 } 106 107 static __inline void 108 restore_ic(u_int64_t psr) 109 { 110 __asm __volatile("mov psr.l=%0;; srlz.i" :: "r" (psr)); 111 } 112 113 /* 114 * Entered with psr.ic and psr.i both zero. 115 */ 116 void 117 enter_kernel(u_int64_t start, struct bootinfo *bi) 118 { 119 u_int64_t psr; 120 121 __asm __volatile("srlz.i;;"); 122 __asm __volatile("mov cr.ipsr=%0" 123 :: "r"(IA64_PSR_IC 124 | IA64_PSR_DT 125 | IA64_PSR_RT 126 | IA64_PSR_IT 127 | IA64_PSR_BN)); 128 __asm __volatile("mov cr.iip=%0" :: "r"(start)); 129 __asm __volatile("mov cr.ifs=r0;;"); 130 __asm __volatile("mov ar.rsc=0;; flushrs;;"); 131 __asm __volatile("mov r8=%0" :: "r" (bi)); 132 __asm __volatile("rfi;;"); 133 } 134 135 static int 136 elf64_exec(struct preloaded_file *fp) 137 { 138 pt_entry_t pte; 139 struct bootinfo *bi; 140 u_int64_t psr; 141 UINTN mapkey, pages, size; 142 UINTN descsz; 143 UINT32 descver; 144 EFI_STATUS status; 145 146 if (strcmp(fp->f_type, ELF64_KERNELTYPE)) return(EFTYPE); 147 148 /* 149 * Allocate enough pages to hold the bootinfo block and the memory 150 * map EFI will return to us. The memory map has an unknown size, 151 * so we have to determine that first. Note that the AllocatePages 152 * call can itself modify the memory map, so we have to take that 153 * into account as well. The changes to the memory map are caused 154 * by splitting a range of free memory into two (AFAICT), so that 155 * one is marked as being loader data. 156 */ 157 size = 0; 158 descsz = sizeof(EFI_MEMORY_DESCRIPTOR); 159 BS->GetMemoryMap(&size, NULL, &mapkey, &descsz, &descver); 160 size += descsz + ((sizeof(struct bootinfo) + 0x0f) & ~0x0f); 161 pages = EFI_SIZE_TO_PAGES(size); 162 status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, pages, 163 (void*)&bi); 164 if (EFI_ERROR(status)) { 165 printf("unable to create bootinfo block (status=0x%lx)\n", 166 (long)status); 167 return (ENOMEM); 168 } 169 170 bzero(bi, sizeof(struct bootinfo)); 171 bi_load(bi, fp, &mapkey, pages); 172 173 printf("Entering %s at 0x%lx...\n", fp->f_name, fp->marks[MARK_ENTRY]); 174 175 status = BS->ExitBootServices(IH, mapkey); 176 if (EFI_ERROR(status)) { 177 printf("ExitBootServices returned 0x%lx\n", status); 178 return (EINVAL); 179 } 180 181 psr = disable_ic(); 182 183 /* 184 * Region 6 is direct mapped UC and region 7 is direct mapped 185 * WC. The details of this is controlled by the Alt {I,D}TLB 186 * handlers. Here we just make sure that they have the largest 187 * possible page size to minimise TLB usage. 188 */ 189 ia64_set_rr(IA64_RR_BASE(6), (6 << 8) | (28 << 2)); 190 ia64_set_rr(IA64_RR_BASE(7), (7 << 8) | (28 << 2)); 191 192 pte = PTE_PRESENT | PTE_MA_WB | PTE_ACCESSED | PTE_DIRTY | 193 PTE_PL_KERN | PTE_AR_RWX; 194 195 __asm __volatile("mov cr.ifa=%0" :: "r"(IA64_RR_BASE(7))); 196 __asm __volatile("mov cr.itir=%0" :: "r"(28 << 2)); 197 __asm __volatile("ptr.i %0,%1" :: "r"(IA64_RR_BASE(7)), "r"(28<<2)); 198 __asm __volatile("ptr.d %0,%1" :: "r"(IA64_RR_BASE(7)), "r"(28<<2)); 199 __asm __volatile("srlz.i;;"); 200 __asm __volatile("itr.i itr[%0]=%1;;" :: "r"(0), "r"(pte)); 201 __asm __volatile("srlz.i;;"); 202 __asm __volatile("itr.d dtr[%0]=%1;;" :: "r"(0), "r"(pte)); 203 __asm __volatile("srlz.i;;"); 204 205 enter_kernel(fp->marks[MARK_ENTRY], bi); 206 207 restore_ic(psr); 208 } 209
Indexes created Wed Oct 01 19:09:53 GMT 2025