NetBSD-5.0.2/sys/arch/atari/atari/pmap_bootstrap.c
/* $NetBSD: pmap_bootstrap.c,v 1.1.2.3 2009/03/26 17:28:47 snj Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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) 1991 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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. 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.
*
* @(#)pmap.c 7.5 (Berkeley) 5/10/91
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/user.h>
#include <uvm/uvm.h>
#include <machine/pte.h>
#include <machine/cpu.h>
#include <machine/vmparam.h>
#include <m68k/cacheops.h>
struct memseg boot_segs[NMEM_SEGS];
struct memseg usable_segs[NMEM_SEGS];
extern st_entry_t *Sysseg;
extern pt_entry_t *Sysmap;
extern paddr_t avail_start;
extern paddr_t avail_end;
extern vsize_t mem_size;
extern vaddr_t virtual_avail;
extern vaddr_t virtual_end;
#if defined(M68040) || defined(M68060)
extern int protostfree;
#endif
extern void * msgbufaddr;
extern paddr_t msgbufpa;
/*
* All those kernel PT submaps that BSD is so fond of
*/
void *CADDR1, *CADDR2;
char *vmmap;
extern int protection_codes[];
/*
* Bootstrap the system enough to run with virtual memory.
*
* This is called after mapping has already been enabled
* and just syncs the pmap module with what has already been done.
*/
void
pmap_bootstrap(vaddr_t vstart, paddr_t sysseg_pa)
{
vaddr_t va;
int i;
/*
* Announce page-size to the VM-system
*/
uvmexp.pagesize = NBPG;
uvm_setpagesize();
/*
* Setup physical address ranges
*/
for (i = 0; usable_segs[i + 1].start; i++)
;
/* XXX: allow for msgbuf */
usable_segs[i].end -= m68k_round_page(MSGBUFSIZE);
msgbufpa = usable_segs[i].end;
/*
* Count physical memory
*/
mem_size = 0;
for (i = 0; i < NMEM_SEGS; i++) {
if (boot_segs[i].start == boot_segs[i].end)
break;
mem_size += boot_segs[i].end - boot_segs[i].start;
}
/*
* Announce available memory to the VM-system
*/
for (i = 0; usable_segs[i].start; i++)
uvm_page_physload(atop(usable_segs[i].start),
atop(usable_segs[i].end),
atop(usable_segs[i].start),
atop(usable_segs[i].end),
usable_segs[i].free_list);
avail_start = usable_segs[0].start;
avail_end = usable_segs[i - 1].end;
virtual_avail = vstart;
virtual_end = VM_MAX_KERNEL_ADDRESS;
/*
* Initialize protection array.
* XXX don't use a switch statement, it might produce an
* absolute "jmp" table.
*/
{
int *kp;
kp = (int *)&protection_codes;
kp[VM_PROT_NONE|VM_PROT_NONE|VM_PROT_NONE] = 0;
kp[VM_PROT_READ|VM_PROT_NONE|VM_PROT_NONE] = PG_RO;
kp[VM_PROT_READ|VM_PROT_NONE|VM_PROT_EXECUTE] = PG_RO;
kp[VM_PROT_NONE|VM_PROT_NONE|VM_PROT_EXECUTE] = PG_RO;
kp[VM_PROT_NONE|VM_PROT_WRITE|VM_PROT_NONE] = PG_RW;
kp[VM_PROT_NONE|VM_PROT_WRITE|VM_PROT_EXECUTE] = PG_RW;
kp[VM_PROT_READ|VM_PROT_WRITE|VM_PROT_NONE] = PG_RW;
kp[VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE] = PG_RW;
}
/*
* Kernel page/segment table allocated in locore,
* just initialize pointers.
*/
pmap_kernel()->pm_stpa = (st_entry_t *)sysseg_pa;
pmap_kernel()->pm_stab = Sysseg;
pmap_kernel()->pm_ptab = Sysmap;
#if defined(M68040) || defined(M68060)
if (mmutype == MMU_68040) {
pmap_kernel()->pm_stfree = protostfree;
}
#endif
simple_lock_init(&pmap_kernel()->pm_lock);
pmap_kernel()->pm_count = 1;
/*
* Allocate all the submaps we need
*/
#define SYSMAP(c, v, n) \
v = (c)va; va += ((n)*PAGE_SIZE);
va = virtual_avail;
SYSMAP(void * ,CADDR1 ,1 )
SYSMAP(void * ,CADDR2 ,1 )
SYSMAP(void * ,vmmap ,1 )
SYSMAP(void * ,msgbufaddr ,btoc(MSGBUFSIZE) )
DCIS();
virtual_avail = reserve_dumppages(va);
}