/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_M32R_CMPXCHG_H #define _ASM_M32R_CMPXCHG_H /* * M32R version: * Copyright (C) 2001, 2002 Hitoshi Yamamoto * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org> */ #include <linux/irqflags.h> #include <asm/assembler.h> #include <asm/dcache_clear.h> extern void __xchg_called_with_bad_pointer(void); 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); } #define xchg(ptr, x) ({ \ ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), \ sizeof(*(ptr)))); \ }) 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 xchg_local(ptr, x) \ ((__typeof__(*(ptr)))__xchg_local((unsigned long)(x), (ptr), \ sizeof(*(ptr)))) 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 /* _ASM_M32R_CMPXCHG_H */
Name | Type | Size | Permission | Actions |
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m32104ut | Folder | 0755 |
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m32700ut | Folder | 0755 |
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mappi2 | Folder | 0755 |
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mappi3 | Folder | 0755 |
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opsput | Folder | 0755 |
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Kbuild | File | 318 B | 0644 |
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addrspace.h | File | 1.67 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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assembler.h | File | 4.2 KB | 0644 |
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atomic.h | File | 6.29 KB | 0644 |
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barrier.h | File | 506 B | 0644 |
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bitops.h | File | 6.23 KB | 0644 |
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bug.h | File | 115 B | 0644 |
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bugs.h | File | 410 B | 0644 |
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cache.h | File | 222 B | 0644 |
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cachectl.h | File | 739 B | 0644 |
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cacheflush.h | File | 3.2 KB | 0644 |
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checksum.h | File | 4.83 KB | 0644 |
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cmpxchg.h | File | 4.86 KB | 0644 |
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dcache_clear.h | File | 1.01 KB | 0644 |
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delay.h | File | 31 B | 0644 |
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device.h | File | 148 B | 0644 |
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div64.h | File | 31 B | 0644 |
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dma-mapping.h | File | 570 B | 0644 |
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dma.h | File | 281 B | 0644 |
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elf.h | File | 3.64 KB | 0644 |
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emergency-restart.h | File | 188 B | 0644 |
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fb.h | File | 414 B | 0644 |
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flat.h | File | 4.2 KB | 0644 |
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ftrace.h | File | 12 B | 0644 |
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futex.h | File | 82 B | 0644 |
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hardirq.h | File | 214 B | 0644 |
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hw_irq.h | File | 87 B | 0644 |
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io.h | File | 6.44 KB | 0644 |
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irq.h | File | 2.94 KB | 0644 |
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irq_regs.h | File | 34 B | 0644 |
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irqflags.h | File | 2.24 KB | 0644 |
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kdebug.h | File | 32 B | 0644 |
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kmap_types.h | File | 251 B | 0644 |
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linkage.h | File | 177 B | 0644 |
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local.h | File | 7.8 KB | 0644 |
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local64.h | File | 33 B | 0644 |
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m32102.h | File | 14.71 KB | 0644 |
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m32r.h | File | 5.7 KB | 0644 |
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m32r_mp_fpga.h | File | 14.89 KB | 0644 |
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mc146818rtc.h | File | 671 B | 0644 |
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mmu.h | File | 403 B | 0644 |
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mmu_context.h | File | 4.23 KB | 0644 |
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mmzone.h | File | 1.29 KB | 0644 |
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page.h | File | 2.62 KB | 0644 |
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pci.h | File | 147 B | 0644 |
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percpu.h | File | 165 B | 0644 |
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pgalloc.h | File | 1.84 KB | 0644 |
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pgtable-2level.h | File | 2.31 KB | 0644 |
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pgtable.h | File | 9.7 KB | 0644 |
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processor.h | File | 2.93 KB | 0644 |
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ptrace.h | File | 1.3 KB | 0644 |
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rtc.h | File | 1.99 KB | 0644 |
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s1d13806.h | File | 9.84 KB | 0644 |
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segment.h | File | 228 B | 0644 |
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serial.h | File | 187 B | 0644 |
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setup.h | File | 1022 B | 0644 |
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shmparam.h | File | 197 B | 0644 |
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signal.h | File | 561 B | 0644 |
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smp.h | File | 3.5 KB | 0644 |
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spinlock.h | File | 7.15 KB | 0644 |
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spinlock_types.h | File | 520 B | 0644 |
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string.h | File | 378 B | 0644 |
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switch_to.h | File | 1.48 KB | 0644 |
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syscall.h | File | 252 B | 0644 |
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termios.h | File | 1.74 KB | 0644 |
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thread_info.h | File | 3.71 KB | 0644 |
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timex.h | File | 581 B | 0644 |
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tlb.h | File | 483 B | 0644 |
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tlbflush.h | File | 2.94 KB | 0644 |
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topology.h | File | 167 B | 0644 |
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types.h | File | 258 B | 0644 |
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uaccess.h | File | 15.3 KB | 0644 |
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ucontext.h | File | 321 B | 0644 |
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unaligned.h | File | 592 B | 0644 |
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unistd.h | File | 1.23 KB | 0644 |
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user.h | File | 2.1 KB | 0644 |
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vga.h | File | 436 B | 0644 |
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xor.h | File | 148 B | 0644 |
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