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/*-
* Copyright (c) 2006 Marcel Moolenaar
* All rights reserved.
*
* 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 AUTHOR ``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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stand.h>
#include <string.h>
#include <sys/param.h>
#include <sys/linker.h>
#include <machine/elf.h>
#include <machine/ia64_cpu.h>
#include <machine/pte.h>
#include <ia64/include/bootinfo.h>
#include <ia64/include/vmparam.h>
#include <efi.h>
#include <efilib.h>
#include "bootstrap.h"
#define _KERNEL
static int elf64_exec(struct preloaded_file *amp);
struct file_format ia64_elf = { elf64_loadfile, elf64_exec };
/*
* Entered with psr.ic and psr.i both zero.
*/
void
enter_kernel(uint64_t start, uint64_t bi)
{
__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;;");
/* NOTREACHED */
}
static int
elf64_exec(struct preloaded_file *fp)
{
struct file_metadata *md;
Elf_Ehdr *hdr;
pt_entry_t pte;
uint64_t bi_addr;
md = file_findmetadata(fp, MODINFOMD_ELFHDR);
if (md == NULL)
return (EINVAL);
hdr = (Elf_Ehdr *)&(md->md_data);
bi_load(fp, &bi_addr);
printf("Entering %s at 0x%lx...\n", fp->f_name, hdr->e_entry);
ldr_enter(fp->f_name);
__asm __volatile("rsm psr.ic|psr.i;;");
__asm __volatile("srlz.i;;");
/*
* 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("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"(pte));
__asm __volatile("srlz.i;;");
__asm __volatile("itr.d dtr[%0]=%1;;" :: "r"(0), "r"(pte));
__asm __volatile("srlz.i;;");
enter_kernel(hdr->e_entry, bi_addr);
/* NOTREACHED */
return (0);
}
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