| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. |
| 3 | |
| 4 | #ifndef __ASM_CSKY_BITOPS_H |
| 5 | #define __ASM_CSKY_BITOPS_H |
| 6 | |
| 7 | #include <linux/compiler.h> |
| 8 | #include <asm/barrier.h> |
| 9 | |
| 10 | /* |
| 11 | * asm-generic/bitops/ffs.h |
| 12 | */ |
| 13 | static inline int ffs(int x) |
| 14 | { |
| 15 | if (!x) |
| 16 | return 0; |
| 17 | |
| 18 | asm volatile ( |
| 19 | "brev %0\n" |
| 20 | "ff1 %0\n" |
| 21 | "addi %0, 1\n" |
| 22 | : "=&r"(x) |
| 23 | : "0"(x)); |
| 24 | return x; |
| 25 | } |
| 26 | |
| 27 | /* |
| 28 | * asm-generic/bitops/__ffs.h |
| 29 | */ |
| 30 | static __always_inline unsigned long __ffs(unsigned long x) |
| 31 | { |
| 32 | asm volatile ( |
| 33 | "brev %0\n" |
| 34 | "ff1 %0\n" |
| 35 | : "=&r"(x) |
| 36 | : "0"(x)); |
| 37 | return x; |
| 38 | } |
| 39 | |
| 40 | /* |
| 41 | * asm-generic/bitops/fls.h |
| 42 | */ |
| 43 | static __always_inline int fls(unsigned int x) |
| 44 | { |
| 45 | asm volatile( |
| 46 | "ff1 %0\n" |
| 47 | : "=&r"(x) |
| 48 | : "0"(x)); |
| 49 | |
| 50 | return (32 - x); |
| 51 | } |
| 52 | |
| 53 | /* |
| 54 | * asm-generic/bitops/__fls.h |
| 55 | */ |
| 56 | static __always_inline unsigned long __fls(unsigned long x) |
| 57 | { |
| 58 | return fls(x) - 1; |
| 59 | } |
| 60 | |
| 61 | #include <asm-generic/bitops/ffz.h> |
| 62 | #include <asm-generic/bitops/fls64.h> |
| 63 | #include <asm-generic/bitops/find.h> |
| 64 | |
| 65 | #ifndef _LINUX_BITOPS_H |
| 66 | #error only <linux/bitops.h> can be included directly |
| 67 | #endif |
| 68 | |
| 69 | #include <asm-generic/bitops/sched.h> |
| 70 | #include <asm-generic/bitops/hweight.h> |
| 71 | #include <asm-generic/bitops/lock.h> |
| 72 | #include <asm-generic/bitops/atomic.h> |
| 73 | |
| 74 | /* |
| 75 | * bug fix, why only could use atomic!!!! |
| 76 | */ |
| 77 | #include <asm-generic/bitops/non-atomic.h> |
| 78 | #define __clear_bit(nr, vaddr) clear_bit(nr, vaddr) |
| 79 | |
| 80 | #include <asm-generic/bitops/le.h> |
| 81 | #include <asm-generic/bitops/ext2-atomic.h> |
| 82 | #endif /* __ASM_CSKY_BITOPS_H */ |