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One more small step towards a unified m68k pmap: 

use the common pmap_copy_page() and pmap_zero_page (copied from Atari).
This commit is contained in:
is 1999-02-06 22:48:08 +00:00
parent ad268a2ff8
commit 892e4f60af
2 changed files with 87 additions and 73 deletions
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57
sys/arch/amiga/amiga/locore.s
View File

@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.103 1998/11/11 06:41:23 thorpej Exp $ */
/* $NetBSD: locore.s,v 1.104 1999/02/06 22:48:08 is Exp $ */
/*
* Copyright (c) 1988 University of Utah.
@ -1430,61 +1430,6 @@ Lcpydone:
clrl a1@(PCB_ONFAULT) | clear error catch
rts
/*
* Copy 1 relocation unit (NBPG bytes)
* from physical address to physical address
*/
ENTRY(physcopyseg)
movl sp@(4),d0 | source page number
moveq #PGSHIFT,d1
lsll d1,d0 | convert to address
orl #PG_CI+PG_RW+PG_V,d0 | make sure valid and writable
movl _CMAP1,a0
movl d0,a0@ | load in page table
movl _CADDR1,sp@- | destination kernel VA
jbsr _TBIS | invalidate any old mapping
addql #4,sp
movl sp@(8),d0 | destination page number
moveq #PGSHIFT,d1
lsll d1,d0 | convert to address
orl #PG_CI+PG_RW+PG_V,d0 | make sure valid and writable
movl _CMAP2,a0
movl d0,a0@ | load in page table
movl _CADDR2,sp@- | destination kernel VA
jbsr _TBIS | invalidate any old mapping
addql #4,sp
movl _CADDR1,a0 | source addr
movl _CADDR2,a1 | destination addr
movl #NBPG/4-1,d0 | count
Lpcpy:
movl a0@+,a1@+ | copy longword
dbf d0,Lpcpy | continue until done
rts
/*
* zero out physical memory
* specified in relocation units (NBPG bytes)
*/
ENTRY(clearseg)
movl sp@(4),d0 | destination page number
moveq #PGSHIFT,d1
lsll d1,d0 | convert to address
orl #PG_CI+PG_RW+PG_V,d0 | make sure valid and writable
movl _CMAP1,a0
movl _CADDR1,sp@- | destination kernel VA
movl d0,a0@ | load in page map
jbsr _TBIS | invalidate any old mapping
addql #4,sp
movl _CADDR1,a1 | destination addr
movl #NBPG/4-1,d0 | count
/* simple clear loop is fastest on 68020 */
Lclrloop:
clrl a1@+ | clear a longword
dbf d0,Lclrloop | continue til done
rts
/*
* Invalidate entire TLB.
*/

103
sys/arch/amiga/amiga/pmap.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.57 1999/01/16 20:06:47 chuck Exp $ */
/* $NetBSD: pmap.c,v 1.58 1999/02/06 22:48:08 is Exp $ */
/*
* Copyright (c) 1991 Regents of the University of California.
@ -2011,42 +2011,111 @@ pmap_deactivate(p)
}
/*
* pmap_zero_page zeros the specified (machine independent)
* page by mapping the page into virtual memory and using
* bzero to clear its contents, one machine dependent page
* at a time.
* pmap_zero_page: [ INTERFACE ]
*
* Zero the specified (machine independent) page by mapping the page
* into virtual memory and using bzero to clear its contents, one
* machine dependent page at a time.
*
* Note: WE DO NOT CURRENTLY LOCK THE TEMPORARY ADDRESSES!
* (Actually, we go to splimp(), and since we don't
* support multiple processors, this is sufficient.)
*/
void
pmap_zero_page(phys)
register vm_offset_t phys;
register paddr_t phys;
{
int s;
int dst_pte = PG_RW | PG_V;
#ifdef DEBUG
if (pmapdebug & PDB_FOLLOW)
printf("pmap_zero_page(%lx)\n", phys);
#endif
phys >>= PG_SHIFT;
clearseg(phys);
#if defined(M68040) || defined(M68060)
if (mmutype == MMU_68040) {
/*
* Set copyback caching on the page; this is required
* for cache consistency (since regular mappings are
* copyback as well).
*/
dst_pte |= PG_CCB;
}
#endif
s = splimp();
*CMAP1 = phys | dst_pte;
TBIS((vaddr_t)CADDR1);
zeropage(CADDR1);
#ifdef DEBUG
/*
* XXX: Invalidating is not strictly necessary.... Not doing it
* is saving us a few cycles
*/
*CMAP1 = PG_NV;
TBIS((vaddr_t)CADDR1);
#endif
splx(s);
}
/*
* pmap_copy_page copies the specified (machine independent)
* page by mapping the page into virtual memory and using
* bcopy to copy the page, one machine dependent page at a
* time.
* pmap_copy_page: [ INTERFACE ]
*
* Copy the specified (machine independent) page by mapping the page
* into virtual memory and using bcopy to copy the page, one machine
* dependent page at a time.
*
* Note: WE DO NOT CURRENTLY LOCK THE TEMPORARY ADDRESSES!
* (Actually, we go to splimp(), and since we don't
* support multiple processors, this is sufficient.)
*/
void
pmap_copy_page(src, dst)
register vm_offset_t src, dst;
register paddr_t src, dst;
{
int s;
int src_pte = PG_RO | PG_V;
int dst_pte = PG_RW | PG_V;
#ifdef DEBUG
if (pmapdebug & PDB_FOLLOW)
printf("pmap_copy_page(%lx, %lx)\n", src, dst);
#endif
src >>= PG_SHIFT;
dst >>= PG_SHIFT;
physcopyseg(src, dst);
}
#if defined(M68040) || defined(M68060)
if (mmutype == MMU_68040) {
/*
* Set copyback caching on the page; this is required
* for cache consistency (since regular mappings are
* copyback as well).
*/
dst_pte |= PG_CCB;
}
#endif
s = splimp();
*CMAP1 = src | src_pte;
TBIS((vaddr_t)CADDR1);
*CMAP2 = dst | dst_pte;
TBIS((vaddr_t)CADDR2);
copypage(CADDR1, CADDR2);
#ifdef DEBUG
/*
* XXX: Invalidating is not strictly necessary.... Not doing it
* is saving us a few cycles
*/
*CMAP1 = PG_NV;
TBIS((vaddr_t)CADDR1);
*CMAP2 = PG_NV;
TBIS((vaddr_t)CADDR2);
#endif
splx(s);
}
/*
* Routine: pmap_pageable