Merge branch 'WIP.x86/asm' into x86/urgent, because the topic is ready

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 0 insertions, 308 deletions

diff --git a/arch/m32r/include/asm/spinlock.h b/arch/m32r/include/asm/spinlock.h
deleted file mode 100644
index 0189f410f8f5..000000000000
--- a/arch/m32r/include/asm/spinlock.h
+++ /dev/null
@@ -1,308 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_M32R_SPINLOCK_H
-#define _ASM_M32R_SPINLOCK_H
-
-/*
- *  linux/include/asm-m32r/spinlock.h
- *
- *  M32R version:
- *    Copyright (C) 2001, 2002  Hitoshi Yamamoto
- *    Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
- */
-
-#include <linux/compiler.h>
-#include <linux/atomic.h>
-#include <asm/dcache_clear.h>
-#include <asm/page.h>
-#include <asm/barrier.h>
-#include <asm/processor.h>
-
-/*
- * Your basic SMP spinlocks, allowing only a single CPU anywhere
- *
- * (the type definitions are in asm/spinlock_types.h)
- *
- * Simple spin lock operations.  There are two variants, one clears IRQ's
- * on the local processor, one does not.
- *
- * We make no fairness assumptions. They have a cost.
- */
-
-#define arch_spin_is_locked(x)		(*(volatile int *)(&(x)->slock) <= 0)
-
-/**
- * arch_spin_trylock - Try spin lock and return a result
- * @lock: Pointer to the lock variable
- *
- * arch_spin_trylock() tries to get the lock and returns a result.
- * On the m32r, the result value is 1 (= Success) or 0 (= Failure).
- */
-static inline int arch_spin_trylock(arch_spinlock_t *lock)
-{
-	int oldval;
-	unsigned long tmp1, tmp2;
-
-	/*
-	 * lock->slock :  =1 : unlock
-	 *             : <=0 : lock
-	 * {
-	 *   oldval = lock->slock; <--+ need atomic operation
-	 *   lock->slock = 0;      <--+
-	 * }
-	 */
-	__asm__ __volatile__ (
-		"# arch_spin_trylock		\n\t"
-		"ldi	%1, #0;			\n\t"
-		"mvfc	%2, psw;		\n\t"
-		"clrpsw	#0x40 -> nop;		\n\t"
-		DCACHE_CLEAR("%0", "r6", "%3")
-		"lock	%0, @%3;		\n\t"
-		"unlock	%1, @%3;		\n\t"
-		"mvtc	%2, psw;		\n\t"
-		: "=&r" (oldval), "=&r" (tmp1), "=&r" (tmp2)
-		: "r" (&lock->slock)
-		: "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
-		, "r6"
-#endif	/* CONFIG_CHIP_M32700_TS1 */
-	);
-
-	return (oldval > 0);
-}
-
-static inline void arch_spin_lock(arch_spinlock_t *lock)
-{
-	unsigned long tmp0, tmp1;
-
-	/*
-	 * lock->slock :  =1 : unlock
-	 *             : <=0 : lock
-	 *
-	 * for ( ; ; ) {
-	 *   lock->slock -= 1;  <-- need atomic operation
-	 *   if (lock->slock == 0) break;
-	 *   for ( ; lock->slock <= 0 ; );
-	 * }
-	 */
-	__asm__ __volatile__ (
-		"# arch_spin_lock		\n\t"
-		".fillinsn			\n"
-		"1:				\n\t"
-		"mvfc	%1, psw;		\n\t"
-		"clrpsw	#0x40 -> nop;		\n\t"
-		DCACHE_CLEAR("%0", "r6", "%2")
-		"lock	%0, @%2;		\n\t"
-		"addi	%0, #-1;		\n\t"
-		"unlock	%0, @%2;		\n\t"
-		"mvtc	%1, psw;		\n\t"
-		"bltz	%0, 2f;			\n\t"
-		LOCK_SECTION_START(".balign 4 \n\t")
-		".fillinsn			\n"
-		"2:				\n\t"
-		"ld	%0, @%2;		\n\t"
-		"bgtz	%0, 1b;			\n\t"
-		"bra	2b;			\n\t"
-		LOCK_SECTION_END
-		: "=&r" (tmp0), "=&r" (tmp1)
-		: "r" (&lock->slock)
-		: "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
-		, "r6"
-#endif	/* CONFIG_CHIP_M32700_TS1 */
-	);
-}
-
-static inline void arch_spin_unlock(arch_spinlock_t *lock)
-{
-	mb();
-	lock->slock = 1;
-}
-
-/*
- * Read-write spinlocks, allowing multiple readers
- * but only one writer.
- *
- * NOTE! it is quite common to have readers in interrupts
- * but no interrupt writers. For those circumstances we
- * can "mix" irq-safe locks - any writer needs to get a
- * irq-safe write-lock, but readers can get non-irqsafe
- * read-locks.
- *
- * On x86, we implement read-write locks as a 32-bit counter
- * with the high bit (sign) being the "contended" bit.
- *
- * The inline assembly is non-obvious. Think about it.
- *
- * Changed to use the same technique as rw semaphores.  See
- * semaphore.h for details.  -ben
- */
-
-static inline void arch_read_lock(arch_rwlock_t *rw)
-{
-	unsigned long tmp0, tmp1;
-
-	/*
-	 * rw->lock :  >0 : unlock
-	 *          : <=0 : lock
-	 *
-	 * for ( ; ; ) {
-	 *   rw->lock -= 1;  <-- need atomic operation
-	 *   if (rw->lock >= 0) break;
-	 *   rw->lock += 1;  <-- need atomic operation
-	 *   for ( ; rw->lock <= 0 ; );
-	 * }
-	 */
-	__asm__ __volatile__ (
-		"# read_lock			\n\t"
-		".fillinsn			\n"
-		"1:				\n\t"
-		"mvfc	%1, psw;		\n\t"
-		"clrpsw	#0x40 -> nop;		\n\t"
-		DCACHE_CLEAR("%0", "r6", "%2")
-		"lock	%0, @%2;		\n\t"
-		"addi	%0, #-1;		\n\t"
-		"unlock	%0, @%2;		\n\t"
-		"mvtc	%1, psw;		\n\t"
-		"bltz	%0, 2f;			\n\t"
-		LOCK_SECTION_START(".balign 4 \n\t")
-		".fillinsn			\n"
-		"2:				\n\t"
-		"clrpsw	#0x40 -> nop;		\n\t"
-		DCACHE_CLEAR("%0", "r6", "%2")
-		"lock	%0, @%2;		\n\t"
-		"addi	%0, #1;			\n\t"
-		"unlock	%0, @%2;		\n\t"
-		"mvtc	%1, psw;		\n\t"
-		".fillinsn			\n"
-		"3:				\n\t"
-		"ld	%0, @%2;		\n\t"
-		"bgtz	%0, 1b;			\n\t"
-		"bra	3b;			\n\t"
-		LOCK_SECTION_END
-		: "=&r" (tmp0), "=&r" (tmp1)
-		: "r" (&rw->lock)
-		: "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
-		, "r6"
-#endif	/* CONFIG_CHIP_M32700_TS1 */
-	);
-}
-
-static inline void arch_write_lock(arch_rwlock_t *rw)
-{
-	unsigned long tmp0, tmp1, tmp2;
-
-	/*
-	 * rw->lock :  =RW_LOCK_BIAS_STR : unlock
-	 *          : !=RW_LOCK_BIAS_STR : lock
-	 *
-	 * for ( ; ; ) {
-	 *   rw->lock -= RW_LOCK_BIAS_STR;  <-- need atomic operation
-	 *   if (rw->lock == 0) break;
-	 *   rw->lock += RW_LOCK_BIAS_STR;  <-- need atomic operation
-	 *   for ( ; rw->lock != RW_LOCK_BIAS_STR ; ) ;
-	 * }
-	 */
-	__asm__ __volatile__ (
-		"# write_lock					\n\t"
-		"seth	%1, #high(" RW_LOCK_BIAS_STR ");	\n\t"
-		"or3	%1, %1, #low(" RW_LOCK_BIAS_STR ");	\n\t"
-		".fillinsn					\n"
-		"1:						\n\t"
-		"mvfc	%2, psw;				\n\t"
-		"clrpsw	#0x40 -> nop;				\n\t"
-		DCACHE_CLEAR("%0", "r7", "%3")
-		"lock	%0, @%3;				\n\t"
-		"sub	%0, %1;					\n\t"
-		"unlock	%0, @%3;				\n\t"
-		"mvtc	%2, psw;				\n\t"
-		"bnez	%0, 2f;					\n\t"
-		LOCK_SECTION_START(".balign 4 \n\t")
-		".fillinsn					\n"
-		"2:						\n\t"
-		"clrpsw	#0x40 -> nop;				\n\t"
-		DCACHE_CLEAR("%0", "r7", "%3")
-		"lock	%0, @%3;				\n\t"
-		"add	%0, %1;					\n\t"
-		"unlock	%0, @%3;				\n\t"
-		"mvtc	%2, psw;				\n\t"
-		".fillinsn					\n"
-		"3:						\n\t"
-		"ld	%0, @%3;				\n\t"
-		"beq	%0, %1, 1b;				\n\t"
-		"bra	3b;					\n\t"
-		LOCK_SECTION_END
-		: "=&r" (tmp0), "=&r" (tmp1), "=&r" (tmp2)
-		: "r" (&rw->lock)
-		: "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
-		, "r7"
-#endif	/* CONFIG_CHIP_M32700_TS1 */
-	);
-}
-
-static inline void arch_read_unlock(arch_rwlock_t *rw)
-{
-	unsigned long tmp0, tmp1;
-
-	__asm__ __volatile__ (
-		"# read_unlock			\n\t"
-		"mvfc	%1, psw;		\n\t"
-		"clrpsw	#0x40 -> nop;		\n\t"
-		DCACHE_CLEAR("%0", "r6", "%2")
-		"lock	%0, @%2;		\n\t"
-		"addi	%0, #1;			\n\t"
-		"unlock	%0, @%2;		\n\t"
-		"mvtc	%1, psw;		\n\t"
-		: "=&r" (tmp0), "=&r" (tmp1)
-		: "r" (&rw->lock)
-		: "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
-		, "r6"
-#endif	/* CONFIG_CHIP_M32700_TS1 */
-	);
-}
-
-static inline void arch_write_unlock(arch_rwlock_t *rw)
-{
-	unsigned long tmp0, tmp1, tmp2;
-
-	__asm__ __volatile__ (
-		"# write_unlock					\n\t"
-		"seth	%1, #high(" RW_LOCK_BIAS_STR ");	\n\t"
-		"or3	%1, %1, #low(" RW_LOCK_BIAS_STR ");	\n\t"
-		"mvfc	%2, psw;				\n\t"
-		"clrpsw	#0x40 -> nop;				\n\t"
-		DCACHE_CLEAR("%0", "r7", "%3")
-		"lock	%0, @%3;				\n\t"
-		"add	%0, %1;					\n\t"
-		"unlock	%0, @%3;				\n\t"
-		"mvtc	%2, psw;				\n\t"
-		: "=&r" (tmp0), "=&r" (tmp1), "=&r" (tmp2)
-		: "r" (&rw->lock)
-		: "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
-		, "r7"
-#endif	/* CONFIG_CHIP_M32700_TS1 */
-	);
-}
-
-static inline int arch_read_trylock(arch_rwlock_t *lock)
-{
-	atomic_t *count = (atomic_t*)lock;
-	if (atomic_dec_return(count) >= 0)
-		return 1;
-	atomic_inc(count);
-	return 0;
-}
-
-static inline int arch_write_trylock(arch_rwlock_t *lock)
-{
-	atomic_t *count = (atomic_t *)lock;
-	if (atomic_sub_and_test(RW_LOCK_BIAS, count))
-		return 1;
-	atomic_add(RW_LOCK_BIAS, count);
-	return 0;
-}
-
-#endif	/* _ASM_M32R_SPINLOCK_H */