0463b4a2fb
1. Make libefi portable by removing ia64 specific code and build it on i386 and amd64 by default to prevent regressions. These changes include fixes and improvements over previous code to establish or improve APIs where none existed or when the amount of kluging was unacceptably high. 2. Increase the amount of sharing between the efi and ski loaders to improve maintainability of the loaders and simplify making changes to the loader-kernel handshaking in the future. The version of the efi and ski loaders are now both changed to 1.2 as user visible improvements and changes have been made.
125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/*-
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* Copyright (c) 2006 Marcel Moolenaar
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* All rights reserved.
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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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*
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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/ia64_cpu.h>
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#include <machine/pte.h>
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#include <ia64/include/bootinfo.h>
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#include <ia64/include/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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/*
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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(uint64_t start, uint64_t bi)
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{
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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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/* NOTREACHED */
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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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uint64_t bi_addr;
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md = file_findmetadata(fp, MODINFOMD_ELFHDR);
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if (md == NULL)
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return (EINVAL);
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hdr = (Elf_Ehdr *)&(md->md_data);
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bi_load(fp, &bi_addr);
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printf("Entering %s at 0x%lx...\n", fp->f_name, hdr->e_entry);
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ldr_enter(fp->f_name);
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__asm __volatile("rsm psr.ic|psr.i;;");
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__asm __volatile("srlz.i;;");
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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_addr);
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/* NOTREACHED */
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return (0);
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}
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