mirror of
https://github.com/brain-hackers/u-boot-brain
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* include/asm-nds32/macro.h
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*
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* Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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* Copyright (C) 2011 Andes Technology Corporation
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* Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
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*/
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#ifndef __ASM_NDS_MACRO_H
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#define __ASM_NDS_MACRO_H
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#ifdef __ASSEMBLY__
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/*
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* These macros provide a convenient way to write 8, 16 and 32 bit data
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* to an "immediate address (address used by periphal)" only.
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* Registers r4 and r5 are used, any data in these registers are
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* overwritten by the macros.
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* The macros are valid for any NDS32 architecture, they do not implement
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* any memory barriers so caution is recommended when using these when the
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* caches are enabled or on a multi-core system.
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*/
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.macro write32, addr, data
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li $r4, \addr
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li $r5, \data
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swi $r5, [$r4]
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.endm
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.macro write16, addr, data
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li $r4, \addr
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li $r5, \data
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shi $r5, [$r4]
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.endm
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.macro write8, addr, data
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li $r4, \addr
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li $r5, \data
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sbi $r5, [$r4]
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.endm
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/*
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* This macro read a value from a register, then do OR operation
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* (set bit fields) to the value, and then store it back to the register.
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* Note: Instruction 'ori' supports immediate value up to 15 bits.
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*/
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.macro setbf32, addr, data
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li $r4, \addr
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lwi $r5, [$r4]
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li $r6, \data
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or $r5, $r5, $r6
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swi $r5, [$r4]
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.endm
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.macro setbf15, addr, data
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li $r4, \addr
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lwi $r5, [$r4]
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ori $r5, $r5, \data
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swi $r5, [$r4]
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.endm
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/*
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* This macro generates a loop that can be used for delays in the code.
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* Register r4 is used, any data in this register is overwritten by the
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* macro.
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* The macro is valid for any NDS32 architeture. The actual time spent in the
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* loop will vary from CPU to CPU though.
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*/
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.macro wait_timer, time
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li $r4, \time
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1:
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nop
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addi $r4, $r4, -1
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bnez $r4, 1b
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.endm
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_ARM_MACRO_H */
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