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Diffstat (limited to 'include/asm-m32r/system.h')
| -rw-r--r-- | include/asm-m32r/system.h | 431 |
1 files changed, 0 insertions, 431 deletions
diff --git a/include/asm-m32r/system.h b/include/asm-m32r/system.h deleted file mode 100644 index c980f5ba8de7..000000000000 --- a/include/asm-m32r/system.h +++ /dev/null @@ -1,431 +0,0 @@ -#ifndef _ASM_M32R_SYSTEM_H -#define _ASM_M32R_SYSTEM_H - -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2001 Hiroyuki Kondo, Hirokazu Takata, and Hitoshi Yamamoto - * Copyright (C) 2004, 2006 Hirokazu Takata <takata at linux-m32r.org> - */ - -#include <linux/compiler.h> -#include <asm/assembler.h> - -#ifdef __KERNEL__ - -/* - * switch_to(prev, next) should switch from task `prev' to `next' - * `prev' will never be the same as `next'. - * - * `next' and `prev' should be struct task_struct, but it isn't always defined - */ - -#if defined(CONFIG_FRAME_POINTER) || \ - !defined(CONFIG_SCHED_OMIT_FRAME_POINTER) -#define M32R_PUSH_FP " push fp\n" -#define M32R_POP_FP " pop fp\n" -#else -#define M32R_PUSH_FP "" -#define M32R_POP_FP "" -#endif - -#define switch_to(prev, next, last) do { \ - __asm__ __volatile__ ( \ - " seth lr, #high(1f) \n" \ - " or3 lr, lr, #low(1f) \n" \ - " st lr, @%4 ; store old LR \n" \ - " ld lr, @%5 ; load new LR \n" \ - M32R_PUSH_FP \ - " st sp, @%2 ; store old SP \n" \ - " ld sp, @%3 ; load new SP \n" \ - " push %1 ; store `prev' on new stack \n" \ - " jmp lr \n" \ - " .fillinsn \n" \ - "1: \n" \ - " pop %0 ; restore `__last' from new stack \n" \ - M32R_POP_FP \ - : "=r" (last) \ - : "0" (prev), \ - "r" (&(prev->thread.sp)), "r" (&(next->thread.sp)), \ - "r" (&(prev->thread.lr)), "r" (&(next->thread.lr)) \ - : "memory", "lr" \ - ); \ -} while(0) - -/* Interrupt Control */ -#if !defined(CONFIG_CHIP_M32102) && !defined(CONFIG_CHIP_M32104) -#define local_irq_enable() \ - __asm__ __volatile__ ("setpsw #0x40 -> nop": : :"memory") -#define local_irq_disable() \ - __asm__ __volatile__ ("clrpsw #0x40 -> nop": : :"memory") -#else /* CONFIG_CHIP_M32102 || CONFIG_CHIP_M32104 */ -static inline void local_irq_enable(void) -{ - unsigned long tmpreg; - __asm__ __volatile__( - "mvfc %0, psw; \n\t" - "or3 %0, %0, #0x0040; \n\t" - "mvtc %0, psw; \n\t" - : "=&r" (tmpreg) : : "cbit", "memory"); -} - -static inline void local_irq_disable(void) -{ - unsigned long tmpreg0, tmpreg1; - __asm__ __volatile__( - "ld24 %0, #0 ; Use 32-bit insn. \n\t" - "mvfc %1, psw ; No interrupt can be accepted here. \n\t" - "mvtc %0, psw \n\t" - "and3 %0, %1, #0xffbf \n\t" - "mvtc %0, psw \n\t" - : "=&r" (tmpreg0), "=&r" (tmpreg1) : : "cbit", "memory"); -} -#endif /* CONFIG_CHIP_M32102 || CONFIG_CHIP_M32104 */ - -#define local_save_flags(x) \ - __asm__ __volatile__("mvfc %0,psw" : "=r"(x) : /* no input */) - -#define local_irq_restore(x) \ - __asm__ __volatile__("mvtc %0,psw" : /* no outputs */ \ - : "r" (x) : "cbit", "memory") - -#if !(defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_M32104)) -#define local_irq_save(x) \ - __asm__ __volatile__( \ - "mvfc %0, psw; \n\t" \ - "clrpsw #0x40 -> nop; \n\t" \ - : "=r" (x) : /* no input */ : "memory") -#else /* CONFIG_CHIP_M32102 || CONFIG_CHIP_M32104 */ -#define local_irq_save(x) \ - ({ \ - unsigned long tmpreg; \ - __asm__ __volatile__( \ - "ld24 %1, #0 \n\t" \ - "mvfc %0, psw \n\t" \ - "mvtc %1, psw \n\t" \ - "and3 %1, %0, #0xffbf \n\t" \ - "mvtc %1, psw \n\t" \ - : "=r" (x), "=&r" (tmpreg) \ - : : "cbit", "memory"); \ - }) -#endif /* CONFIG_CHIP_M32102 || CONFIG_CHIP_M32104 */ - -#define irqs_disabled() \ - ({ \ - unsigned long flags; \ - local_save_flags(flags); \ - !(flags & 0x40); \ - }) - -#define nop() __asm__ __volatile__ ("nop" : : ) - -#define xchg(ptr, x) \ - ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) -#define xchg_local(ptr, x) \ - ((__typeof__(*(ptr)))__xchg_local((unsigned long)(x), (ptr), \ - sizeof(*(ptr)))) - -extern void __xchg_called_with_bad_pointer(void); - -#ifdef CONFIG_CHIP_M32700_TS1 -#define DCACHE_CLEAR(reg0, reg1, addr) \ - "seth "reg1", #high(dcache_dummy); \n\t" \ - "or3 "reg1", "reg1", #low(dcache_dummy); \n\t" \ - "lock "reg0", @"reg1"; \n\t" \ - "add3 "reg0", "addr", #0x1000; \n\t" \ - "ld "reg0", @"reg0"; \n\t" \ - "add3 "reg0", "addr", #0x2000; \n\t" \ - "ld "reg0", @"reg0"; \n\t" \ - "unlock "reg0", @"reg1"; \n\t" - /* FIXME: This workaround code cannot handle kernel modules - * correctly under SMP environment. - */ -#else /* CONFIG_CHIP_M32700_TS1 */ -#define DCACHE_CLEAR(reg0, reg1, addr) -#endif /* CONFIG_CHIP_M32700_TS1 */ - -static __always_inline unsigned long -__xchg(unsigned long x, volatile void *ptr, int size) -{ - unsigned long flags; - unsigned long tmp = 0; - - local_irq_save(flags); - - switch (size) { -#ifndef CONFIG_SMP - case 1: - __asm__ __volatile__ ( - "ldb %0, @%2 \n\t" - "stb %1, @%2 \n\t" - : "=&r" (tmp) : "r" (x), "r" (ptr) : "memory"); - break; - case 2: - __asm__ __volatile__ ( - "ldh %0, @%2 \n\t" - "sth %1, @%2 \n\t" - : "=&r" (tmp) : "r" (x), "r" (ptr) : "memory"); - break; - case 4: - __asm__ __volatile__ ( - "ld %0, @%2 \n\t" - "st %1, @%2 \n\t" - : "=&r" (tmp) : "r" (x), "r" (ptr) : "memory"); - break; -#else /* CONFIG_SMP */ - case 4: - __asm__ __volatile__ ( - DCACHE_CLEAR("%0", "r4", "%2") - "lock %0, @%2; \n\t" - "unlock %1, @%2; \n\t" - : "=&r" (tmp) : "r" (x), "r" (ptr) - : "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r4" -#endif /* CONFIG_CHIP_M32700_TS1 */ - ); - break; -#endif /* CONFIG_SMP */ - default: - __xchg_called_with_bad_pointer(); - } - - local_irq_restore(flags); - - return (tmp); -} - -static __always_inline unsigned long -__xchg_local(unsigned long x, volatile void *ptr, int size) -{ - unsigned long flags; - unsigned long tmp = 0; - - local_irq_save(flags); - - switch (size) { - case 1: - __asm__ __volatile__ ( - "ldb %0, @%2 \n\t" - "stb %1, @%2 \n\t" - : "=&r" (tmp) : "r" (x), "r" (ptr) : "memory"); - break; - case 2: - __asm__ __volatile__ ( - "ldh %0, @%2 \n\t" - "sth %1, @%2 \n\t" - : "=&r" (tmp) : "r" (x), "r" (ptr) : "memory"); - break; - case 4: - __asm__ __volatile__ ( - "ld %0, @%2 \n\t" - "st %1, @%2 \n\t" - : "=&r" (tmp) : "r" (x), "r" (ptr) : "memory"); - break; - default: - __xchg_called_with_bad_pointer(); - } - - local_irq_restore(flags); - - return (tmp); -} - -#define __HAVE_ARCH_CMPXCHG 1 - -static inline unsigned long -__cmpxchg_u32(volatile unsigned int *p, unsigned int old, unsigned int new) -{ - unsigned long flags; - unsigned int retval; - - local_irq_save(flags); - __asm__ __volatile__ ( - DCACHE_CLEAR("%0", "r4", "%1") - M32R_LOCK" %0, @%1; \n" - " bne %0, %2, 1f; \n" - M32R_UNLOCK" %3, @%1; \n" - " bra 2f; \n" - " .fillinsn \n" - "1:" - M32R_UNLOCK" %0, @%1; \n" - " .fillinsn \n" - "2:" - : "=&r" (retval) - : "r" (p), "r" (old), "r" (new) - : "cbit", "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r4" -#endif /* CONFIG_CHIP_M32700_TS1 */ - ); - local_irq_restore(flags); - - return retval; -} - -static inline unsigned long -__cmpxchg_local_u32(volatile unsigned int *p, unsigned int old, - unsigned int new) -{ - unsigned long flags; - unsigned int retval; - - local_irq_save(flags); - __asm__ __volatile__ ( - DCACHE_CLEAR("%0", "r4", "%1") - "ld %0, @%1; \n" - " bne %0, %2, 1f; \n" - "st %3, @%1; \n" - " bra 2f; \n" - " .fillinsn \n" - "1:" - "st %0, @%1; \n" - " .fillinsn \n" - "2:" - : "=&r" (retval) - : "r" (p), "r" (old), "r" (new) - : "cbit", "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r4" -#endif /* CONFIG_CHIP_M32700_TS1 */ - ); - local_irq_restore(flags); - - return retval; -} - -/* This function doesn't exist, so you'll get a linker error - if something tries to do an invalid cmpxchg(). */ -extern void __cmpxchg_called_with_bad_pointer(void); - -static inline unsigned long -__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size) -{ - switch (size) { - case 4: - return __cmpxchg_u32(ptr, old, new); -#if 0 /* we don't have __cmpxchg_u64 */ - case 8: - return __cmpxchg_u64(ptr, old, new); -#endif /* 0 */ - } - __cmpxchg_called_with_bad_pointer(); - return old; -} - -#define cmpxchg(ptr, o, n) \ - ((__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)(o), \ - (unsigned long)(n), sizeof(*(ptr)))) - -#include <asm-generic/cmpxchg-local.h> - -static inline unsigned long __cmpxchg_local(volatile void *ptr, - unsigned long old, - unsigned long new, int size) -{ - switch (size) { - case 4: - return __cmpxchg_local_u32(ptr, old, new); - default: - return __cmpxchg_local_generic(ptr, old, new, size); - } - - return old; -} - -/* - * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make - * them available. - */ -#define cmpxchg_local(ptr, o, n) \ - ((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \ - (unsigned long)(n), sizeof(*(ptr)))) -#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) - -#endif /* __KERNEL__ */ - -/* - * Memory barrier. - * - * mb() prevents loads and stores being reordered across this point. - * rmb() prevents loads being reordered across this point. - * wmb() prevents stores being reordered across this point. - */ -#define mb() barrier() -#define rmb() mb() -#define wmb() mb() - -/** - * read_barrier_depends - Flush all pending reads that subsequents reads - * depend on. - * - * No data-dependent reads from memory-like regions are ever reordered - * over this barrier. All reads preceding this primitive are guaranteed - * to access memory (but not necessarily other CPUs' caches) before any - * reads following this primitive that depend on the data return by - * any of the preceding reads. This primitive is much lighter weight than - * rmb() on most CPUs, and is never heavier weight than is - * rmb(). - * - * These ordering constraints are respected by both the local CPU - * and the compiler. - * - * Ordering is not guaranteed by anything other than these primitives, - * not even by data dependencies. See the documentation for - * memory_barrier() for examples and URLs to more information. - * - * For example, the following code would force ordering (the initial - * value of "a" is zero, "b" is one, and "p" is "&a"): - * - * <programlisting> - * CPU 0 CPU 1 - * - * b = 2; - * memory_barrier(); - * p = &b; q = p; - * read_barrier_depends(); - * d = *q; - * </programlisting> - * - * - * because the read of "*q" depends on the read of "p" and these - * two reads are separated by a read_barrier_depends(). However, - * the following code, with the same initial values for "a" and "b": - * - * <programlisting> - * CPU 0 CPU 1 - * - * a = 2; - * memory_barrier(); - * b = 3; y = b; - * read_barrier_depends(); - * x = a; - * </programlisting> - * - * does not enforce ordering, since there is no data dependency between - * the read of "a" and the read of "b". Therefore, on some CPUs, such - * as Alpha, "y" could be set to 3 and "x" to 0. Use rmb() - * in cases like this where there are no data dependencies. - **/ - -#define read_barrier_depends() do { } while (0) - -#ifdef CONFIG_SMP -#define smp_mb() mb() -#define smp_rmb() rmb() -#define smp_wmb() wmb() -#define smp_read_barrier_depends() read_barrier_depends() -#define set_mb(var, value) do { (void) xchg(&var, value); } while (0) -#else -#define smp_mb() barrier() -#define smp_rmb() barrier() -#define smp_wmb() barrier() -#define smp_read_barrier_depends() do { } while (0) -#define set_mb(var, value) do { var = value; barrier(); } while (0) -#endif - -#define arch_align_stack(x) (x) - -#endif /* _ASM_M32R_SYSTEM_H */ |