exec.c revision 1.2.2.3
1 /* $NetBSD: exec.c,v 1.2.2.3 2006/06/01 22:34:54 kardel 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 /* __FBSDID("$FreeBSD: src/sys/boot/efi/libefi/elf_freebsd.c,v 1.13 2004/04/05 23:41:28 imp Exp $"); */ 75 76 #include <lib/libsa/stand.h> 77 #include <lib/libsa/loadfile.h> 78 79 #include <sys/param.h> 80 #include <sys/lock.h> 81 82 #include <machine/elf_machdep.h> 83 #include <machine/bootinfo.h> 84 #include <machine/ia64_cpu.h> 85 #include <machine/pte.h> 86 #include <machine/vmparam.h> 87 88 #include <efi.h> 89 #include <efilib.h> 90 91 #include "bootstrap.h" 92 93 #define _KERNEL 94 95 static int elf64_exec(struct preloaded_file *amp); 96 97 struct file_format ia64_elf = { elf64_loadfile, elf64_exec }; 98 99 static __inline u_int64_t 100 disable_ic() 101 { 102 u_int64_t psr; 103 __asm __volatile("mov %0=psr;;" : "=r" (psr)); 104 __asm __volatile("rsm psr.ic|psr.i;; srlz.i;;"); 105 return psr; 106 } 107 108 static __inline void 109 restore_ic(u_int64_t psr) 110 { 111 __asm __volatile("mov psr.l=%0;; srlz.i" :: "r" (psr)); 112 } 113 114 /* 115 * Entered with psr.ic and psr.i both zero. 116 */ 117 void 118 enter_kernel(u_int64_t start, struct bootinfo *bi) 119 { 120 u_int64_t psr; 121 122 __asm __volatile("srlz.i;;"); 123 __asm __volatile("mov cr.ipsr=%0" 124 :: "r"(IA64_PSR_IC 125 | IA64_PSR_DT 126 | IA64_PSR_RT 127 | IA64_PSR_IT 128 | IA64_PSR_BN)); 129 __asm __volatile("mov cr.iip=%0" :: "r"(start)); 130 __asm __volatile("mov cr.ifs=r0;;"); 131 __asm __volatile("mov ar.rsc=0;; flushrs;;"); 132 __asm __volatile("mov r8=%0" :: "r" (bi)); 133 __asm __volatile("rfi;;"); 134 } 135 136 static int 137 elf64_exec(struct preloaded_file *fp) 138 { 139 pt_entry_t pte; 140 struct bootinfo *bi; 141 u_int64_t psr; 142 UINTN mapkey, pages, size; 143 UINTN descsz; 144 UINT32 descver; 145 EFI_STATUS status; 146 147 if (strcmp(fp->f_type, ELF64_KERNELTYPE)) return(EFTYPE); 148 149 /* 150 * Allocate enough pages to hold the bootinfo block and the memory 151 * map EFI will return to us. The memory map has an unknown size, 152 * so we have to determine that first. Note that the AllocatePages 153 * call can itself modify the memory map, so we have to take that 154 * into account as well. The changes to the memory map are caused 155 * by splitting a range of free memory into two (AFAICT), so that 156 * one is marked as being loader data. 157 */ 158 size = 0; 159 descsz = sizeof(EFI_MEMORY_DESCRIPTOR); 160 BS->GetMemoryMap(&size, NULL, &mapkey, &descsz, &descver); 161 size += descsz + ((sizeof(struct bootinfo) + 0x0f) & ~0x0f); 162 pages = EFI_SIZE_TO_PAGES(size); 163 status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, pages, 164 (void*)&bi); 165 if (EFI_ERROR(status)) { 166 printf("unable to create bootinfo block (status=0x%lx)\n", 167 (long)status); 168 return (ENOMEM); 169 } 170 171 bzero(bi, sizeof(struct bootinfo)); 172 bi_load(bi, fp, &mapkey, pages); 173 174 printf("Entering %s at 0x%lx...\n", fp->f_name, fp->marks[MARK_ENTRY]); 175 176 status = BS->ExitBootServices(IH, mapkey); 177 if (EFI_ERROR(status)) { 178 printf("ExitBootServices returned 0x%lx\n", status); 179 return (EINVAL); 180 } 181 182 psr = disable_ic(); 183 184 /* 185 * Region 6 is direct mapped UC and region 7 is direct mapped 186 * WC. The details of this is controlled by the Alt {I,D}TLB 187 * handlers. Here we just make sure that they have the largest 188 * possible page size to minimise TLB usage. 189 */ 190 ia64_set_rr(IA64_RR_BASE(6), (6 << 8) | (28 << 2)); 191 ia64_set_rr(IA64_RR_BASE(7), (7 << 8) | (28 << 2)); 192 193 pte = PTE_PRESENT | PTE_MA_WB | PTE_ACCESSED | PTE_DIRTY | 194 PTE_PL_KERN | PTE_AR_RWX; 195 196 __asm __volatile("mov cr.ifa=%0" :: "r"(IA64_RR_BASE(7))); 197 __asm __volatile("mov cr.itir=%0" :: "r"(28 << 2)); 198 __asm __volatile("ptr.i %0,%1" :: "r"(IA64_RR_BASE(7)), "r"(28<<2)); 199 __asm __volatile("ptr.d %0,%1" :: "r"(IA64_RR_BASE(7)), "r"(28<<2)); 200 __asm __volatile("srlz.i;;"); 201 __asm __volatile("itr.i itr[%0]=%1;;" :: "r"(0), "r"(pte)); 202 __asm __volatile("srlz.i;;"); 203 __asm __volatile("itr.d dtr[%0]=%1;;" :: "r"(0), "r"(pte)); 204 __asm __volatile("srlz.i;;"); 205 206 enter_kernel(fp->marks[MARK_ENTRY], bi); 207 208 restore_ic(psr); 209 } 210
Indexes created Wed Oct 01 19:09:53 GMT 2025