| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _ASM_POWERPC_SYNCH_H |
| 3 | #define _ASM_POWERPC_SYNCH_H |
| 4 | #ifdef __KERNEL__ |
| 5 | |
| 6 | #include <asm/feature-fixups.h> |
| 7 | #include <asm/asm-const.h> |
| 8 | |
| 9 | #ifndef __ASSEMBLY__ |
| 10 | extern unsigned int __start___lwsync_fixup, __stop___lwsync_fixup; |
| 11 | extern void do_lwsync_fixups(unsigned long value, void *fixup_start, |
| 12 | void *fixup_end); |
| 13 | |
| 14 | static inline void eieio(void) |
| 15 | { |
| 16 | __asm__ __volatile__ ("eieio" : : : "memory"); |
| 17 | } |
| 18 | |
| 19 | static inline void isync(void) |
| 20 | { |
| 21 | __asm__ __volatile__ ("isync" : : : "memory"); |
| 22 | } |
| 23 | #endif /* __ASSEMBLY__ */ |
| 24 | |
| 25 | #if defined(__powerpc64__) |
| 26 | # define LWSYNC lwsync |
| 27 | #elif defined(CONFIG_E500) |
| 28 | # define LWSYNC \ |
| 29 | START_LWSYNC_SECTION(96); \ |
| 30 | sync; \ |
| 31 | MAKE_LWSYNC_SECTION_ENTRY(96, __lwsync_fixup); |
| 32 | #else |
| 33 | # define LWSYNC sync |
| 34 | #endif |
| 35 | |
| 36 | #ifdef CONFIG_SMP |
| 37 | #define __PPC_ACQUIRE_BARRIER \ |
| 38 | START_LWSYNC_SECTION(97); \ |
| 39 | isync; \ |
| 40 | MAKE_LWSYNC_SECTION_ENTRY(97, __lwsync_fixup); |
| 41 | #define PPC_ACQUIRE_BARRIER "\n" stringify_in_c(__PPC_ACQUIRE_BARRIER) |
| 42 | #define PPC_RELEASE_BARRIER stringify_in_c(LWSYNC) "\n" |
| 43 | #define PPC_ATOMIC_ENTRY_BARRIER "\n" stringify_in_c(sync) "\n" |
| 44 | #define PPC_ATOMIC_EXIT_BARRIER "\n" stringify_in_c(sync) "\n" |
| 45 | #else |
| 46 | #define PPC_ACQUIRE_BARRIER |
| 47 | #define PPC_RELEASE_BARRIER |
| 48 | #define PPC_ATOMIC_ENTRY_BARRIER |
| 49 | #define PPC_ATOMIC_EXIT_BARRIER |
| 50 | #endif |
| 51 | |
| 52 | #endif /* __KERNEL__ */ |
| 53 | #endif /* _ASM_POWERPC_SYNCH_H */ |