/* $NetBSD: exec.c,v 1.8 2019/05/07 02:05:17 scole Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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. */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell. * * 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. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * @(#)boot.c 8.1 (Berkeley) 6/10/93 */ #include <sys/cdefs.h> /* __FBSDID("$FreeBSD: src/sys/boot/efi/libefi/elf_freebsd.c,v 1.13 2004/04/05 23:41:28 imp Exp $"); */ #include <lib/libsa/stand.h> #include <lib/libsa/loadfile.h> #include <lib/libkern/libkern.h> #include <sys/param.h> #include <sys/lock.h> #include <machine/elf_machdep.h> #include <machine/bootinfo.h> #include <machine/ia64_cpu.h> #include <machine/pte.h> #include <machine/vmparam.h> #include <efi.h> #include <efilib.h> #include <efiboot.h> #include <machine/efilib.h> #include "bootstrap.h" #define _KERNEL static int elf64_exec(struct preloaded_file *amp); struct file_format ia64_elf = { elf64_loadfile, elf64_exec }; static __inline u_int64_t disable_ic(void) { u_int64_t psr; __asm __volatile("mov %0=psr;;" : "=r" (psr)); __asm __volatile("rsm psr.ic|psr.i;; srlz.i;;"); return psr; } static __inline void restore_ic(u_int64_t psr) { __asm __volatile("mov psr.l=%0;; srlz.i" :: "r" (psr)); } /* * Entered with psr.ic and psr.i both zero. */ void enter_kernel(u_int64_t start, struct bootinfo *bi) { u_int64_t psr; __asm __volatile("srlz.i;;"); __asm __volatile("mov cr.ipsr=%0" :: "r"(IA64_PSR_IC | IA64_PSR_DT | IA64_PSR_RT | IA64_PSR_IT | IA64_PSR_BN)); __asm __volatile("mov cr.iip=%0" :: "r"(start)); __asm __volatile("mov cr.ifs=r0;;"); __asm __volatile("mov ar.rsc=0;; flushrs;;"); __asm __volatile("mov r8=%0" :: "r" (bi)); __asm __volatile("rfi;;"); } static int elf64_exec(struct preloaded_file *fp) { pt_entry_t pte; struct bootinfo *bi; u_int64_t psr; UINTN mapkey, pages, size; UINTN descsz; UINT32 descver; EFI_STATUS status; if (strcmp(fp->f_type, ELF64_KERNELTYPE)) return(EFTYPE); /* * Allocate enough pages to hold the bootinfo block and the memory * map EFI will return to us. The memory map has an unknown size, * so we have to determine that first. Note that the AllocatePages * call can itself modify the memory map, so we have to take that * into account as well. The changes to the memory map are caused * by splitting a range of free memory into two (AFAICT), so that * one is marked as being loader data. */ size = 0; descsz = sizeof(EFI_MEMORY_DESCRIPTOR); BS->GetMemoryMap(&size, NULL, &mapkey, &descsz, &descver); size += descsz + ((sizeof(struct bootinfo) + 0x0f) & ~0x0f); pages = EFI_SIZE_TO_PAGES(size); status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, pages, (void*)&bi); if (EFI_ERROR(status)) { printf("unable to create bootinfo block (status=0x%lx)\n", (long)status); return (ENOMEM); } memset(bi, 0, sizeof(struct bootinfo)); bi_load(bi, fp, &mapkey, pages); printf("Entering %s at 0x%lx...\n", fp->f_name, fp->marks[MARK_ENTRY]); status = BS->ExitBootServices(IH, mapkey); if (EFI_ERROR(status)) { printf("ExitBootServices returned 0x%lx\n", status); return (EINVAL); } psr = disable_ic(); /* * Region 6 is direct mapped UC and region 7 is direct mapped * WC. The details of this is controlled by the Alt {I,D}TLB * handlers. Here we just make sure that they have the largest * possible page size to minimise TLB usage. */ ia64_set_rr(IA64_RR_BASE(6), (6 << 8) | (28 << 2)); ia64_set_rr(IA64_RR_BASE(7), (7 << 8) | (28 << 2)); pte = PTE_PRESENT | PTE_MA_WB | PTE_ACCESSED | PTE_DIRTY | PTE_PL_KERN | PTE_AR_RWX; __asm __volatile("mov cr.ifa=%0" :: "r"(IA64_RR_BASE(7))); __asm __volatile("mov cr.itir=%0" :: "r"(28 << 2)); __asm __volatile("srlz.d;;"); __asm __volatile("ptr.d %0,%1" :: "r"(IA64_RR_BASE(7)), "r"(28<<2)); __asm __volatile("srlz.d;;"); __asm __volatile("itr.d dtr[%0]=%1;;" :: "r"(0), "r"(pte)); __asm __volatile("srlz.d;;"); __asm __volatile("ptr.i %0,%1;;" :: "r"(IA64_RR_BASE(7)), "r"(28<<2)); __asm __volatile("srlz.i;;"); __asm __volatile("itr.i itr[%0]=%1;;" :: "r"(0), "r"(pte)); __asm __volatile("srlz.i;;"); enter_kernel(fp->marks[MARK_ENTRY], bi); restore_ic(psr); }
