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