1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2deae26bfSKyle McMartin #ifndef __ASM_SPINLOCK_TYPES_H 3deae26bfSKyle McMartin #define __ASM_SPINLOCK_TYPES_H 4deae26bfSKyle McMartin 5deae26bfSKyle McMartin typedef struct { 6deae26bfSKyle McMartin #ifdef CONFIG_PA20 7deae26bfSKyle McMartin volatile unsigned int slock; 8edc35bd7SThomas Gleixner # define __ARCH_SPIN_LOCK_UNLOCKED { 1 } 9deae26bfSKyle McMartin #else 10deae26bfSKyle McMartin volatile unsigned int lock[4]; 11edc35bd7SThomas Gleixner # define __ARCH_SPIN_LOCK_UNLOCKED { { 1, 1, 1, 1 } } 12deae26bfSKyle McMartin #endif 13445c8951SThomas Gleixner } arch_spinlock_t; 14deae26bfSKyle McMartin 15fbdc8f0fSHelge Deller 16fbdc8f0fSHelge Deller /* counter: 17fbdc8f0fSHelge Deller * Unlocked : 0x0100_0000 18fbdc8f0fSHelge Deller * Read lock(s) : 0x00FF_FFFF to 0x01 (Multiple Readers decrement it) 19fbdc8f0fSHelge Deller * Write lock : 0x0, but only if prior value is "unlocked" 0x0100_0000 20fbdc8f0fSHelge Deller */ 21deae26bfSKyle McMartin typedef struct { 22fbdc8f0fSHelge Deller arch_spinlock_t lock_mutex; 23fbdc8f0fSHelge Deller volatile unsigned int counter; 24fb3a6bbcSThomas Gleixner } arch_rwlock_t; 25deae26bfSKyle McMartin 26fbdc8f0fSHelge Deller #define __ARCH_RW_LOCK_UNLOCKED__ 0x01000000 27fbdc8f0fSHelge Deller #define __ARCH_RW_LOCK_UNLOCKED { .lock_mutex = __ARCH_SPIN_LOCK_UNLOCKED, \ 28fbdc8f0fSHelge Deller .counter = __ARCH_RW_LOCK_UNLOCKED__ } 29deae26bfSKyle McMartin 30deae26bfSKyle McMartin #endif 31