mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-25 20:43:32 +00:00
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
|
/*
|
||
|
|
* include/asm-nds32/macro.h
|
||
|
|
*
|
||
|
|
* Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
|
||
|
|
* Copyright (C) 2011 Andes Technology Corporation
|
||
|
|
* Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
|
||
|
|
*
|
||
|
|
* See file CREDITS for list of people who contributed to this
|
||
|
|
* project.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License as
|
||
|
|
* published by the Free Software Foundation; either version 2 of
|
||
|
|
* the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
||
|
|
* MA 02111-1307 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __ASM_NDS_MACRO_H
|
||
|
|
#define __ASM_NDS_MACRO_H
|
||
|
|
#ifdef __ASSEMBLY__
|
||
|
|
|
||
|
|
/*
|
||
|
|
* These macros provide a convenient way to write 8, 16 and 32 bit data
|
||
|
|
* to an "immediate address (address used by periphal)" only.
|
||
|
|
* Registers r4 and r5 are used, any data in these registers are
|
||
|
|
* overwritten by the macros.
|
||
|
|
* The macros are valid for any NDS32 architecture, they do not implement
|
||
|
|
* any memory barriers so caution is recommended when using these when the
|
||
|
|
* caches are enabled or on a multi-core system.
|
||
|
|
*/
|
||
|
|
|
||
|
|
.macro write32, addr, data
|
||
|
|
li $r4, addr
|
||
|
|
li $r5, data
|
||
|
|
swi $r5, [$r4]
|
||
|
|
.endm
|
||
|
|
|
||
|
|
.macro write16, addr, data
|
||
|
|
li $r4, addr
|
||
|
|
li $r5, data
|
||
|
|
shi $r5, [$r4]
|
||
|
|
.endm
|
||
|
|
|
||
|
|
.macro write8, addr, data
|
||
|
|
li $r4, addr
|
||
|
|
li $r5, data
|
||
|
|
sbi $r5, [$r4]
|
||
|
|
.endm
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This macro read a value from a register, then do OR operation
|
||
|
|
* (set bit fields) to the value, and then store it back to the register.
|
||
|
|
* Note: Instruction 'ori' supports immediate value up to 15 bits.
|
||
|
|
*/
|
||
|
|
.macro setbf32, addr, data
|
||
|
|
li $r4, addr
|
||
|
|
lwi $r5, [$r4]
|
||
|
|
li $r6, data
|
||
|
|
or $r5, $r5, $r6
|
||
|
|
swi $r5, [$r4]
|
||
|
|
.endm
|
||
|
|
|
||
|
|
.macro setbf15, addr, data
|
||
|
|
li $r4, addr
|
||
|
|
lwi $r5, [$r4]
|
||
|
|
ori $r5, $r5, data
|
||
|
|
swi $r5, [$r4]
|
||
|
|
.endm
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This macro generates a loop that can be used for delays in the code.
|
||
|
|
* Register r4 is used, any data in this register is overwritten by the
|
||
|
|
* macro.
|
||
|
|
* The macro is valid for any NDS32 architeture. The actual time spent in the
|
||
|
|
* loop will vary from CPU to CPU though.
|
||
|
|
*/
|
||
|
|
|
||
|
|
.macro wait_timer, time
|
||
|
|
li $r4, time
|
||
|
|
1:
|
||
|
|
nop
|
||
|
|
addi $r4, $r4, -1
|
||
|
|
bnez $r4, 1b
|
||
|
|
.endm
|
||
|
|
|
||
|
|
#endif /* __ASSEMBLY__ */
|
||
|
|
#endif /* __ASM_ARM_MACRO_H */
|