/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __M32R_LOCAL_H #define __M32R_LOCAL_H /* * linux/include/asm-m32r/local.h * * M32R version: * Copyright (C) 2001, 2002 Hitoshi Yamamoto * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org> * Copyright (C) 2007 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> */ #include <linux/percpu.h> #include <asm/assembler.h> #include <asm/local.h> /* * Atomic operations that C can't guarantee us. Useful for * resource counting etc.. */ /* * Make sure gcc doesn't try to be clever and move things around * on us. We need to use _exactly_ the address the user gave us, * not some alias that contains the same information. */ typedef struct { volatile int counter; } local_t; #define LOCAL_INIT(i) { (i) } /** * local_read - read local variable * @l: pointer of type local_t * * Atomically reads the value of @l. */ #define local_read(l) ((l)->counter) /** * local_set - set local variable * @l: pointer of type local_t * @i: required value * * Atomically sets the value of @l to @i. */ #define local_set(l, i) (((l)->counter) = (i)) /** * local_add_return - add long to local variable and return it * @i: long value to add * @l: pointer of type local_t * * Atomically adds @i to @l and return (@i + @l). */ static inline long local_add_return(long i, local_t *l) { unsigned long flags; long result; local_irq_save(flags); __asm__ __volatile__ ( "# local_add_return \n\t" DCACHE_CLEAR("%0", "r4", "%1") "ld %0, @%1; \n\t" "add %0, %2; \n\t" "st %0, @%1; \n\t" : "=&r" (result) : "r" (&l->counter), "r" (i) : "memory" #ifdef CONFIG_CHIP_M32700_TS1 , "r4" #endif /* CONFIG_CHIP_M32700_TS1 */ ); local_irq_restore(flags); return result; } /** * local_sub_return - subtract long from local variable and return it * @i: long value to subtract * @l: pointer of type local_t * * Atomically subtracts @i from @l and return (@l - @i). */ static inline long local_sub_return(long i, local_t *l) { unsigned long flags; long result; local_irq_save(flags); __asm__ __volatile__ ( "# local_sub_return \n\t" DCACHE_CLEAR("%0", "r4", "%1") "ld %0, @%1; \n\t" "sub %0, %2; \n\t" "st %0, @%1; \n\t" : "=&r" (result) : "r" (&l->counter), "r" (i) : "memory" #ifdef CONFIG_CHIP_M32700_TS1 , "r4" #endif /* CONFIG_CHIP_M32700_TS1 */ ); local_irq_restore(flags); return result; } /** * local_add - add long to local variable * @i: long value to add * @l: pointer of type local_t * * Atomically adds @i to @l. */ #define local_add(i, l) ((void) local_add_return((i), (l))) /** * local_sub - subtract the local variable * @i: long value to subtract * @l: pointer of type local_t * * Atomically subtracts @i from @l. */ #define local_sub(i, l) ((void) local_sub_return((i), (l))) /** * local_sub_and_test - subtract value from variable and test result * @i: integer value to subtract * @l: pointer of type local_t * * Atomically subtracts @i from @l and returns * true if the result is zero, or false for all * other cases. */ #define local_sub_and_test(i, l) (local_sub_return((i), (l)) == 0) /** * local_inc_return - increment local variable and return it * @l: pointer of type local_t * * Atomically increments @l by 1 and returns the result. */ static inline long local_inc_return(local_t *l) { unsigned long flags; long result; local_irq_save(flags); __asm__ __volatile__ ( "# local_inc_return \n\t" DCACHE_CLEAR("%0", "r4", "%1") "ld %0, @%1; \n\t" "addi %0, #1; \n\t" "st %0, @%1; \n\t" : "=&r" (result) : "r" (&l->counter) : "memory" #ifdef CONFIG_CHIP_M32700_TS1 , "r4" #endif /* CONFIG_CHIP_M32700_TS1 */ ); local_irq_restore(flags); return result; } /** * local_dec_return - decrement local variable and return it * @l: pointer of type local_t * * Atomically decrements @l by 1 and returns the result. */ static inline long local_dec_return(local_t *l) { unsigned long flags; long result; local_irq_save(flags); __asm__ __volatile__ ( "# local_dec_return \n\t" DCACHE_CLEAR("%0", "r4", "%1") "ld %0, @%1; \n\t" "addi %0, #-1; \n\t" "st %0, @%1; \n\t" : "=&r" (result) : "r" (&l->counter) : "memory" #ifdef CONFIG_CHIP_M32700_TS1 , "r4" #endif /* CONFIG_CHIP_M32700_TS1 */ ); local_irq_restore(flags); return result; } /** * local_inc - increment local variable * @l: pointer of type local_t * * Atomically increments @l by 1. */ #define local_inc(l) ((void)local_inc_return(l)) /** * local_dec - decrement local variable * @l: pointer of type local_t * * Atomically decrements @l by 1. */ #define local_dec(l) ((void)local_dec_return(l)) /** * local_inc_and_test - increment and test * @l: pointer of type local_t * * Atomically increments @l by 1 * and returns true if the result is zero, or false for all * other cases. */ #define local_inc_and_test(l) (local_inc_return(l) == 0) /** * local_dec_and_test - decrement and test * @l: pointer of type local_t * * Atomically decrements @l by 1 and * returns true if the result is 0, or false for all * other cases. */ #define local_dec_and_test(l) (local_dec_return(l) == 0) /** * local_add_negative - add and test if negative * @l: pointer of type local_t * @i: integer value to add * * Atomically adds @i to @l and returns true * if the result is negative, or false when * result is greater than or equal to zero. */ #define local_add_negative(i, l) (local_add_return((i), (l)) < 0) #define local_cmpxchg(l, o, n) (cmpxchg_local(&((l)->counter), (o), (n))) #define local_xchg(v, new) (xchg_local(&((l)->counter), new)) /** * local_add_unless - add unless the number is a given value * @l: pointer of type local_t * @a: the amount to add to l... * @u: ...unless l is equal to u. * * Atomically adds @a to @l, so long as it was not @u. * Returns non-zero if @l was not @u, and zero otherwise. */ static inline int local_add_unless(local_t *l, long a, long u) { long c, old; c = local_read(l); for (;;) { if (unlikely(c == (u))) break; old = local_cmpxchg((l), c, c + (a)); if (likely(old == c)) break; c = old; } return c != (u); } #define local_inc_not_zero(l) local_add_unless((l), 1, 0) static inline void local_clear_mask(unsigned long mask, local_t *addr) { unsigned long flags; unsigned long tmp; local_irq_save(flags); __asm__ __volatile__ ( "# local_clear_mask \n\t" DCACHE_CLEAR("%0", "r5", "%1") "ld %0, @%1; \n\t" "and %0, %2; \n\t" "st %0, @%1; \n\t" : "=&r" (tmp) : "r" (addr), "r" (~mask) : "memory" #ifdef CONFIG_CHIP_M32700_TS1 , "r5" #endif /* CONFIG_CHIP_M32700_TS1 */ ); local_irq_restore(flags); } static inline void local_set_mask(unsigned long mask, local_t *addr) { unsigned long flags; unsigned long tmp; local_irq_save(flags); __asm__ __volatile__ ( "# local_set_mask \n\t" DCACHE_CLEAR("%0", "r5", "%1") "ld %0, @%1; \n\t" "or %0, %2; \n\t" "st %0, @%1; \n\t" : "=&r" (tmp) : "r" (addr), "r" (mask) : "memory" #ifdef CONFIG_CHIP_M32700_TS1 , "r5" #endif /* CONFIG_CHIP_M32700_TS1 */ ); local_irq_restore(flags); } /* Atomic operations are already serializing on m32r */ #define smp_mb__before_local_dec() barrier() #define smp_mb__after_local_dec() barrier() #define smp_mb__before_local_inc() barrier() #define smp_mb__after_local_inc() barrier() /* Use these for per-cpu local_t variables: on some archs they are * much more efficient than these naive implementations. Note they take * a variable, not an address. */ #define __local_inc(l) ((l)->a.counter++) #define __local_dec(l) ((l)->a.counter++) #define __local_add(i, l) ((l)->a.counter += (i)) #define __local_sub(i, l) ((l)->a.counter -= (i)) /* Use these for per-cpu local_t variables: on some archs they are * much more efficient than these naive implementations. Note they take * a variable, not an address. */ #endif /* __M32R_LOCAL_H */
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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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