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/* $FreeBSD$ */
/* $NetBSD: loadfile.c,v 1.10 1998/06/25 06:45:46 ross 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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 <stand.h>
#include <string.h>
#include <sys/param.h>
#include <sys/linker.h>
#include <machine/elf.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 "bootstrap.h"
#define _KERNEL
static int elf_exec(struct preloaded_file *amp);
struct file_format ia64_elf = { elf_loadfile, elf_exec };
static __inline u_int64_t
disable_ic()
{
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
elf_exec(struct preloaded_file *fp)
{
struct file_metadata *md;
Elf_Ehdr *hdr;
struct ia64_pte pte;
struct bootinfo *bi;
u_int64_t psr;
UINTN mapkey, pages, size;
UINTN descsz;
UINT32 descver;
EFI_STATUS status;
if ((md = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL)
return(EFTYPE); /* XXX actually EFUCKUP */
hdr = (Elf_Ehdr *)&(md->md_data);
/*
* 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);
}
bzero(bi, sizeof(struct bootinfo));
bi_load(bi, fp, &mapkey, pages);
printf("Entering %s at 0x%lx...\n", fp->f_name, hdr->e_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));
bzero(&pte, sizeof(pte));
pte.pte_p = 1;
pte.pte_ma = PTE_MA_WB;
pte.pte_a = 1;
pte.pte_d = 1;
pte.pte_pl = PTE_PL_KERN;
pte.pte_ar = PTE_AR_RWX;
pte.pte_ppn = 0;
__asm __volatile("mov cr.ifa=%0" :: "r"(IA64_RR_BASE(7)));
__asm __volatile("mov cr.itir=%0" :: "r"(28 << 2));
__asm __volatile("ptr.i %0,%1" :: "r"(IA64_RR_BASE(7)), "r"(28<<2));
__asm __volatile("ptr.d %0,%1" :: "r"(IA64_RR_BASE(7)), "r"(28<<2));
__asm __volatile("srlz.i;;");
__asm __volatile("itr.i itr[%0]=%1;;"
:: "r"(0), "r"(*(u_int64_t*)&pte));
__asm __volatile("srlz.i;;");
__asm __volatile("itr.d dtr[%0]=%1;;"
:: "r"(0), "r"(*(u_int64_t*)&pte));
__asm __volatile("srlz.i;;");
enter_kernel(hdr->e_entry, bi);
restore_ic(psr);
}
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