/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
#include <debug.h>
#include <ppc/asm.h>
#include <ppc/proc_reg.h>
#include <mach/ppc/vm_param.h>
#include <assym.s>
/* void
* db_phys_copy(src, dst, bytecount)
* vm_offset_t src * int bytecount
*
* This routine will copy bytecount bytes from physical address src to physical
* address dst.
*/
ENTRY(db_phys_copy, TAG_NO_FRAME_USED)
/* Switch off data translations */
mfmsr r6
rlwinm r7, r6, 0, MSR_DR_BIT+1, MSR_DR_BIT-1
mtmsr r7
isync /* Ensure data translations are off */
subi r3, r3, 4
subi r4, r4, 4
cmpwi r5, 3
ble- .L_db_phys_copy_bytes
.L_db_phys_copy_loop:
lwz r0, 4(r3)
addi r3, r3, 4
subi r5, r5, 4
stw r0, 4(r4)
addi r4, r4, 4
cmpwi r5, 3
bgt+ .L_db_phys_copy_loop
/* If no leftover bytes, we're done now */
cmpwi r5, 0
beq+ .L_db_phys_copy_done
.L_db_phys_copy_bytes:
addi r3, r3, 3
addi r4, r4, 3
.L_db_phys_copy_byte_loop:
lbz r0, 1(r3)
addi r3, r3, 1
subi r5, r5, 1
stb r0, 1(r4)
addi r4, r4, 1
cmpwi r5, 0
bne+ .L_db_phys_copy_loop
.L_db_phys_copy_done:
mtmsr r6 /* Restore original translations */
isync /* Ensure data translations are off */
blr
/* void
* db_phys_cmp(src_a, src_b, bytecount)
* vm_offset_t src_a * int bytecount
*
* This routine will compare bytecount bytes from physical address src_a and physical
* address src_b.
*/
/* Switch off data translations */
mfmsr r6
rlwinm r7, r6, 0, MSR_DR_BIT+1, MSR_DR_BIT-1
mtmsr r7
isync /* Ensure data translations are off */
subi r3, r3, 4
subi r4, r4, 4
cmpwi r5, 3
ble- .L_db_phys_cmp_bytes
.L_db_phys_cmp_loop:
lwz r0, 4(r3)
lwz r7, 4(r4)
addi r3, r3, 4
addi r4, r4, 4
subi r5, r5, 4
cmpw r0, r7
bne .L_db_phys_cmp_false
cmpwi r5, 3
bgt+ .L_db_phys_cmp_loop
/* If no leftover bytes, we're done now */
cmpwi r5, 0
beq+ .L_db_phys_cmp_true
.L_db_phys_cmp_bytes:
addi r3, r3, 3
addi r4, r4, 3
.L_db_phys_cmp_byte_loop:
lbz r0, 1(r3)
lbz r7, 1(r4)
addi r3, r3, 1
addi r4, r4, 1
subi r5, r5, 1
cmpw r0, r7
bne .L_db_phys_cmp_false
cmpwi r5, 0
bne+ .L_db_phys_cmp_loop
.L_db_phys_cmp_true:
li r3, 1
b .L_db_phys_cmp_done
.L_db_phys_cmp_false:
li r3, 0
.L_db_phys_cmp_done:
mtmsr r6 /* Restore original translations */
isync /* Ensure data translations are off */
blr