From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/parisc/include/asm/spinlock_types.h | 35 ++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 arch/parisc/include/asm/spinlock_types.h (limited to 'arch/parisc/include/asm/spinlock_types.h') diff --git a/arch/parisc/include/asm/spinlock_types.h b/arch/parisc/include/asm/spinlock_types.h new file mode 100644 index 000000000..7b986b09d --- /dev/null +++ b/arch/parisc/include/asm/spinlock_types.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_SPINLOCK_TYPES_H +#define __ASM_SPINLOCK_TYPES_H + +#define __ARCH_SPIN_LOCK_UNLOCKED_VAL 0x1a46 + +#define SPINLOCK_BREAK_INSN 0x0000c006 /* break 6,6 */ + +#ifndef __ASSEMBLY__ + +typedef struct { + volatile unsigned int lock[4]; +# define __ARCH_SPIN_LOCK_UNLOCKED \ + { { __ARCH_SPIN_LOCK_UNLOCKED_VAL, __ARCH_SPIN_LOCK_UNLOCKED_VAL, \ + __ARCH_SPIN_LOCK_UNLOCKED_VAL, __ARCH_SPIN_LOCK_UNLOCKED_VAL } } +} arch_spinlock_t; + + +/* counter: + * Unlocked : 0x0100_0000 + * Read lock(s) : 0x00FF_FFFF to 0x01 (Multiple Readers decrement it) + * Write lock : 0x0, but only if prior value is "unlocked" 0x0100_0000 + */ +typedef struct { + arch_spinlock_t lock_mutex; + volatile unsigned int counter; +} arch_rwlock_t; + +#endif /* __ASSEMBLY__ */ + +#define __ARCH_RW_LOCK_UNLOCKED__ 0x01000000 +#define __ARCH_RW_LOCK_UNLOCKED { .lock_mutex = __ARCH_SPIN_LOCK_UNLOCKED, \ + .counter = __ARCH_RW_LOCK_UNLOCKED__ } + +#endif -- cgit v1.2.3