2 * include/asm-nds32/macro.h
4 * Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
5 * Copyright (C) 2011 Andes Technology Corporation
6 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
8 * SPDX-License-Identifier: GPL-2.0+
11 #ifndef __ASM_NDS_MACRO_H
12 #define __ASM_NDS_MACRO_H
16 * These macros provide a convenient way to write 8, 16 and 32 bit data
17 * to an "immediate address (address used by periphal)" only.
18 * Registers r4 and r5 are used, any data in these registers are
19 * overwritten by the macros.
20 * The macros are valid for any NDS32 architecture, they do not implement
21 * any memory barriers so caution is recommended when using these when the
22 * caches are enabled or on a multi-core system.
25 .macro write32, addr, data
31 .macro write16, addr, data
37 .macro write8, addr, data
44 * This macro read a value from a register, then do OR operation
45 * (set bit fields) to the value, and then store it back to the register.
46 * Note: Instruction 'ori' supports immediate value up to 15 bits.
48 .macro setbf32, addr, data
56 .macro setbf15, addr, data
64 * This macro generates a loop that can be used for delays in the code.
65 * Register r4 is used, any data in this register is overwritten by the
67 * The macro is valid for any NDS32 architeture. The actual time spent in the
68 * loop will vary from CPU to CPU though.
71 .macro wait_timer, time
79 #endif /* __ASSEMBLY__ */
80 #endif /* __ASM_ARM_MACRO_H */