162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-only */ 262306a36Sopenharmony_ci/* -*- linux-c -*- ------------------------------------------------------- * 362306a36Sopenharmony_ci * 462306a36Sopenharmony_ci * Copyright (C) 1991, 1992 Linus Torvalds 562306a36Sopenharmony_ci * Copyright 2007 rPath, Inc. - All Rights Reserved 662306a36Sopenharmony_ci * 762306a36Sopenharmony_ci * ----------------------------------------------------------------------- */ 862306a36Sopenharmony_ci 962306a36Sopenharmony_ci/* 1062306a36Sopenharmony_ci * Very simple bitops for the boot code. 1162306a36Sopenharmony_ci */ 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ci#ifndef BOOT_BITOPS_H 1462306a36Sopenharmony_ci#define BOOT_BITOPS_H 1562306a36Sopenharmony_ci#define _LINUX_BITOPS_H /* Inhibit inclusion of <linux/bitops.h> */ 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ci#include <linux/types.h> 1862306a36Sopenharmony_ci#include <asm/asm.h> 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_cistatic inline bool constant_test_bit(int nr, const void *addr) 2162306a36Sopenharmony_ci{ 2262306a36Sopenharmony_ci const u32 *p = addr; 2362306a36Sopenharmony_ci return ((1UL << (nr & 31)) & (p[nr >> 5])) != 0; 2462306a36Sopenharmony_ci} 2562306a36Sopenharmony_cistatic inline bool variable_test_bit(int nr, const void *addr) 2662306a36Sopenharmony_ci{ 2762306a36Sopenharmony_ci bool v; 2862306a36Sopenharmony_ci const u32 *p = addr; 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ci asm("btl %2,%1" CC_SET(c) : CC_OUT(c) (v) : "m" (*p), "Ir" (nr)); 3162306a36Sopenharmony_ci return v; 3262306a36Sopenharmony_ci} 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci#define test_bit(nr,addr) \ 3562306a36Sopenharmony_ci(__builtin_constant_p(nr) ? \ 3662306a36Sopenharmony_ci constant_test_bit((nr),(addr)) : \ 3762306a36Sopenharmony_ci variable_test_bit((nr),(addr))) 3862306a36Sopenharmony_ci 3962306a36Sopenharmony_cistatic inline void set_bit(int nr, void *addr) 4062306a36Sopenharmony_ci{ 4162306a36Sopenharmony_ci asm("btsl %1,%0" : "+m" (*(u32 *)addr) : "Ir" (nr)); 4262306a36Sopenharmony_ci} 4362306a36Sopenharmony_ci 4462306a36Sopenharmony_ci#endif /* BOOT_BITOPS_H */ 45