213 lines
7.4 KiB
C
213 lines
7.4 KiB
C
/* $NetBSD: loadfile.c,v 1.10 1998/06/25 06:45:46 ross Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)boot.c 8.1 (Berkeley) 6/10/93
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stand.h>
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#include <string.h>
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#include <sys/param.h>
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#include <sys/linker.h>
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#include <machine/elf.h>
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#include <machine/bootinfo.h>
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#include <machine/ia64_cpu.h>
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#include <machine/pte.h>
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#include <machine/vmparam.h>
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#include <efi.h>
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#include <efilib.h>
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#include "bootstrap.h"
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#define _KERNEL
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static int elf64_exec(struct preloaded_file *amp);
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struct file_format ia64_elf = { elf64_loadfile, elf64_exec };
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static __inline u_int64_t
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disable_ic()
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{
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u_int64_t psr;
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__asm __volatile("mov %0=psr;;" : "=r" (psr));
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__asm __volatile("rsm psr.ic|psr.i;; srlz.i;;");
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return psr;
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}
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static __inline void
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restore_ic(u_int64_t psr)
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{
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__asm __volatile("mov psr.l=%0;; srlz.i" :: "r" (psr));
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}
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/*
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* Entered with psr.ic and psr.i both zero.
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*/
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void
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enter_kernel(u_int64_t start, struct bootinfo *bi)
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{
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u_int64_t psr;
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__asm __volatile("srlz.i;;");
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__asm __volatile("mov cr.ipsr=%0"
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:: "r"(IA64_PSR_IC
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| IA64_PSR_DT
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| IA64_PSR_RT
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| IA64_PSR_IT
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| IA64_PSR_BN));
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__asm __volatile("mov cr.iip=%0" :: "r"(start));
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__asm __volatile("mov cr.ifs=r0;;");
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__asm __volatile("mov ar.rsc=0;; flushrs;;");
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__asm __volatile("mov r8=%0" :: "r" (bi));
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__asm __volatile("rfi;;");
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}
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static int
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elf64_exec(struct preloaded_file *fp)
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{
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struct file_metadata *md;
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Elf_Ehdr *hdr;
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pt_entry_t pte;
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struct bootinfo *bi;
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u_int64_t psr;
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UINTN mapkey, pages, size;
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UINTN descsz;
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UINT32 descver;
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EFI_STATUS status;
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if ((md = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL)
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return(EFTYPE); /* XXX actually EFUCKUP */
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hdr = (Elf_Ehdr *)&(md->md_data);
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/*
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* Allocate enough pages to hold the bootinfo block and the memory
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* map EFI will return to us. The memory map has an unknown size,
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* so we have to determine that first. Note that the AllocatePages
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* call can itself modify the memory map, so we have to take that
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* into account as well. The changes to the memory map are caused
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* by splitting a range of free memory into two (AFAICT), so that
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* one is marked as being loader data.
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*/
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size = 0;
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descsz = sizeof(EFI_MEMORY_DESCRIPTOR);
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BS->GetMemoryMap(&size, NULL, &mapkey, &descsz, &descver);
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size += descsz + ((sizeof(struct bootinfo) + 0x0f) & ~0x0f);
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pages = EFI_SIZE_TO_PAGES(size);
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status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, pages,
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(void*)&bi);
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if (EFI_ERROR(status)) {
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printf("unable to create bootinfo block (status=0x%lx)\n",
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(long)status);
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return (ENOMEM);
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}
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bzero(bi, sizeof(struct bootinfo));
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bi_load(bi, fp, &mapkey, pages);
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printf("Entering %s at 0x%lx...\n", fp->f_name, hdr->e_entry);
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status = BS->ExitBootServices(IH, mapkey);
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if (EFI_ERROR(status)) {
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printf("ExitBootServices returned 0x%lx\n", status);
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return (EINVAL);
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}
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psr = disable_ic();
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/*
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* Region 6 is direct mapped UC and region 7 is direct mapped
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* WC. The details of this is controlled by the Alt {I,D}TLB
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* handlers. Here we just make sure that they have the largest
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* possible page size to minimise TLB usage.
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*/
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ia64_set_rr(IA64_RR_BASE(6), (6 << 8) | (28 << 2));
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ia64_set_rr(IA64_RR_BASE(7), (7 << 8) | (28 << 2));
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pte = PTE_PRESENT | PTE_MA_WB | PTE_ACCESSED | PTE_DIRTY |
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PTE_PL_KERN | PTE_AR_RWX;
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__asm __volatile("mov cr.ifa=%0" :: "r"(IA64_RR_BASE(7)));
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__asm __volatile("mov cr.itir=%0" :: "r"(28 << 2));
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__asm __volatile("ptr.i %0,%1" :: "r"(IA64_RR_BASE(7)), "r"(28<<2));
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__asm __volatile("ptr.d %0,%1" :: "r"(IA64_RR_BASE(7)), "r"(28<<2));
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__asm __volatile("srlz.i;;");
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__asm __volatile("itr.i itr[%0]=%1;;" :: "r"(0), "r"(pte));
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__asm __volatile("srlz.i;;");
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__asm __volatile("itr.d dtr[%0]=%1;;" :: "r"(0), "r"(pte));
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__asm __volatile("srlz.i;;");
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enter_kernel(hdr->e_entry, bi);
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restore_ic(psr);
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}
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