forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
533 B
41 lines
533 B
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
|
/* |
|
* This file contains miscellaneous low-level functions for PPC 44x. |
|
* Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation. |
|
*/ |
|
|
|
#include <asm/reg.h> |
|
#include <asm/ppc_asm.h> |
|
|
|
.text |
|
|
|
/* |
|
* Do an IO access in AS1 |
|
*/ |
|
_GLOBAL(as1_readb) |
|
mfmsr r7 |
|
ori r0,r7,MSR_DS |
|
sync |
|
mtmsr r0 |
|
sync |
|
isync |
|
lbz r3,0(r3) |
|
sync |
|
mtmsr r7 |
|
sync |
|
isync |
|
blr |
|
|
|
_GLOBAL(as1_writeb) |
|
mfmsr r7 |
|
ori r0,r7,MSR_DS |
|
sync |
|
mtmsr r0 |
|
sync |
|
isync |
|
stb r3,0(r4) |
|
sync |
|
mtmsr r7 |
|
sync |
|
isync |
|
blr
|
|
|