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/* $OpenBSD: pmap_bootstrap.c,v 1.40 2008/01/04 19:05:32 miod Exp $ */
/* $NetBSD: pmap_bootstrap.c,v 1.50 1999/04/07 06:14:33 scottr Exp $ */
/*
* Copyright (c) 1991, 1993
* The 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_bootstrap.c 8.1 (Berkeley) 6/10/93
*/
#include <sys/param.h>
#include <sys/msgbuf.h>
#include <sys/reboot.h>
#include <sys/systm.h>
#include <uvm/uvm_extern.h>
#include <uvm/uvm_pmap.h>
#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <machine/frame.h>
#include <machine/pmap.h>
#include <machine/pte.h>
#include <machine/vmparam.h>
#include <ufs/mfs/mfs_extern.h>
#include "zsc.h"
#if NZSC > 0
extern int zsinited;
#endif
/*
* These are used to map the RAM:
*/
int numranges; /* = 0 == don't use the ranges */
u_long low[8];
u_long high[8];
u_long maxaddr; /* PA of the last physical page */
int vidlen;
#define VIDMAPSIZE atop(vidlen)
extern u_int32_t mac68k_vidphys;
extern u_int32_t videoaddr;
extern u_int32_t videorowbytes;
extern u_int32_t videosize;
static u_int32_t newvideoaddr;
void bootstrap_mac68k(int);
/*
* pmap_bootstrap() is very tricky on mac68k because it can be called
* with the MMU either on or off. If it's on, we assume that it's mapped
* with the same PA <=> LA mapping that we eventually want.
* The page sizes and the protections will be wrong, anyway.
*
* nextpa is the first address following the loaded kernel. On a IIsi
* on 12 May 1996, that was 0xf9000 beyond firstpa.
*/
#define RELOC(v, t) *((t*)((u_int)&(v)))
#define PA2VA(v, t) *((t*)((u_int)&(v) - firstpa))
/*
* Present a totally tricky view of the world here...
* - count video mappings in the internal IO space (which will
* require some contortion later on)
* - no external IO space
*/
#define MACHINE_IIOMAPSIZE (IIOMAPSIZE + VIDMAPSIZE)
#define MACHINE_INTIOBASE IOBase
#define MACHINE_EIOMAPSIZE 0
/* vidpa internal video space for some machines
* PT pages VIDMAPSIZE pages
*
* XXX note that VIDMAPSIZE, hence vidlen, is needed very early
* in pmap_bootstrap(), so slightly abuse the purpose of
* PMAP_MD_LOCALS here...
*/
#define PMAP_MD_LOCALS \
paddr_t vidpa; \
paddr_t avail_next; \
int i; \
\
vidlen = round_page(((videosize >> 16) & 0xffff) * videorowbytes + \
m68k_page_offset(mac68k_vidphys));
#define PMAP_MD_RELOC1() \
do { \
vidpa = eiopa - VIDMAPSIZE * sizeof(pt_entry_t); \
} while (0)
/*
* Validate the internal IO space, ROM space, and
* framebuffer PTEs (RW+CI).
*
* Note that this is done after the fake IIO space has been
* validated, hence the rom and video pte were already written to
* with incorrect values.
*/
#define PMAP_MD_MAPIOSPACE() \
do { \
if (vidlen != 0) { \
pte = PA2VA(vidpa, u_int *); \
epte = pte + VIDMAPSIZE; \
protopte = trunc_page(mac68k_vidphys) | \
PG_RW | PG_V | PG_CI; \
while (pte < epte) { \
*pte++ = protopte; \
protopte += NBPG; \
} \
} \
} while (0)
#define PMAP_MD_RELOC2() \
do { \
IOBase = iiobase; \
if (vidlen != 0) { \
newvideoaddr = iiobase + ptoa(IIOMAPSIZE) \
+ m68k_page_offset(mac68k_vidphys); \
} \
} while (0)
/*
* Compute memory size from the memory segment information.
*/
#define PMAP_MD_MEMSIZE() \
do { \
avail_next = avail_start; \
physmem = 0; \
for (i = 0; i < numranges; i++) \
physmem += atop(high[i] - low[i]); \
maxaddr = high[numranges - 1] - PAGE_SIZE; \
high[numranges - 1] -= round_page(MSGBUFSIZE); \
avail_end = high[numranges - 1]; \
} while (0)
#define PMAP_MD_RELOC3() /* nothing */
#include <m68k/m68k/pmap_bootstrap.c>
void
bootstrap_mac68k(tc)
int tc;
{
#if NZSC > 0
extern void zs_init(void);
#endif
extern caddr_t esym;
paddr_t nextpa;
if (mac68k_machine.do_graybars)
printf("Bootstrapping OpenBSD/mac68k.\n");
mac68k_vidphys = videoaddr;
if (((tc & 0x80000000) && (mmutype == MMU_68030)) ||
((tc & 0x8000) && (mmutype == MMU_68040))) {
if (mac68k_machine.do_graybars)
printf("Getting mapping from MMU.\n");
(void) get_mapping();
if (mac68k_machine.do_graybars)
printf("Done.\n");
} else {
/* MMU not enabled. Fake up ranges. */
numranges = 1;
low[0] = 0;
high[0] = mac68k_machine.mach_memsize * (1024 * 1024);
if (mac68k_machine.do_graybars)
printf("Faked range to byte 0x%lx.\n", high[0]);
}
nextpa = load_addr + round_page((vaddr_t)esym);
if (mac68k_machine.do_graybars)
printf("Bootstrapping the pmap system.\n");
pmap_bootstrap(nextpa, load_addr);
if (mac68k_machine.do_graybars)
printf("Pmap bootstrapped.\n");
if (!vidlen)
panic("Don't know how to relocate video!");
if (mac68k_machine.do_graybars)
printf("Video address 0x%lx -> 0x%lx.\n",
(unsigned long)videoaddr, (unsigned long)newvideoaddr);
mac68k_set_io_offsets(IOBase);
/*
* If the serial ports are going (for console or 'echo'), then
* we need to make sure the IO change gets propagated properly.
* This resets the base addresses for the 8530 (serial) driver.
*
* WARNING!!! No printfs() (etc) BETWEEN zs_init() and the end
* of this function (where we start using the MMU, so the new
* address is correct).
*/
#if NZSC > 0
if (zsinited != 0)
zs_init();
#endif
videoaddr = newvideoaddr;
}
void
pmap_init_md()
{
vaddr_t addr;
/*
* Mark as unavailable the regions which we have mapped in
* pmap_bootstrap().
*/
addr = (vaddr_t)MACHINE_INTIOBASE;
if (uvm_map(kernel_map, &addr,
ptoa(MACHINE_IIOMAPSIZE),
NULL, UVM_UNKNOWN_OFFSET, 0,
UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE,
UVM_INH_NONE, UVM_ADV_RANDOM,
UVM_FLAG_FIXED)))
panic("pmap_init: bogons in the VM system!");
}
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