diff options
Diffstat (limited to 'include/asm-generic')
-rw-r--r-- | include/asm-generic/atomic.h | 59 | ||||
-rw-r--r-- | include/asm-generic/bitops/ext2-atomic-setbit.h | 11 | ||||
-rw-r--r-- | include/asm-generic/bitops/ext2-atomic.h | 4 | ||||
-rw-r--r-- | include/asm-generic/delay.h | 37 | ||||
-rw-r--r-- | include/asm-generic/io.h | 9 | ||||
-rw-r--r-- | include/asm-generic/iomap.h | 12 | ||||
-rw-r--r-- | include/asm-generic/local.h | 2 | ||||
-rw-r--r-- | include/asm-generic/local64.h | 2 | ||||
-rw-r--r-- | include/asm-generic/system.h | 2 |
9 files changed, 120 insertions, 18 deletions
diff --git a/include/asm-generic/atomic.h b/include/asm-generic/atomic.h index e994197f84b7..e37963c1df4d 100644 --- a/include/asm-generic/atomic.h +++ b/include/asm-generic/atomic.h @@ -1,5 +1,7 @@ /* - * Generic C implementation of atomic counter operations + * Generic C implementation of atomic counter operations. Usable on + * UP systems only. Do not include in machine independent code. + * * Originally implemented for MN10300. * * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. @@ -14,7 +16,11 @@ #define __ASM_GENERIC_ATOMIC_H #ifdef CONFIG_SMP -#error not SMP safe +/* Force people to define core atomics */ +# if !defined(atomic_add_return) || !defined(atomic_sub_return) || \ + !defined(atomic_clear_mask) || !defined(atomic_set_mask) +# error "SMP requires a little arch-specific magic" +# endif #endif /* @@ -32,7 +38,9 @@ * * Atomically reads the value of @v. */ +#ifndef atomic_read #define atomic_read(v) (*(volatile int *)&(v)->counter) +#endif /** * atomic_set - set atomic variable @@ -53,6 +61,7 @@ * * Atomically adds @i to @v and returns the result */ +#ifndef atomic_add_return static inline int atomic_add_return(int i, atomic_t *v) { unsigned long flags; @@ -66,6 +75,7 @@ static inline int atomic_add_return(int i, atomic_t *v) return temp; } +#endif /** * atomic_sub_return - subtract integer from atomic variable @@ -74,6 +84,7 @@ static inline int atomic_add_return(int i, atomic_t *v) * * Atomically subtracts @i from @v and returns the result */ +#ifndef atomic_sub_return static inline int atomic_sub_return(int i, atomic_t *v) { unsigned long flags; @@ -87,6 +98,7 @@ static inline int atomic_sub_return(int i, atomic_t *v) return temp; } +#endif static inline int atomic_add_negative(int i, atomic_t *v) { @@ -117,8 +129,8 @@ static inline void atomic_dec(atomic_t *v) #define atomic_inc_return(v) atomic_add_return(1, (v)) #define atomic_sub_and_test(i, v) (atomic_sub_return((i), (v)) == 0) -#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0) -#define atomic_inc_and_test(v) (atomic_add_return(1, (v)) == 0) +#define atomic_dec_and_test(v) (atomic_dec_return(v) == 0) +#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0) #define atomic_xchg(ptr, v) (xchg(&(ptr)->counter, (v))) #define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new))) @@ -129,26 +141,51 @@ static inline void atomic_dec(atomic_t *v) #define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) -static inline int atomic_add_unless(atomic_t *v, int a, int u) +static inline int __atomic_add_unless(atomic_t *v, int a, int u) { int c, old; c = atomic_read(v); while (c != u && (old = atomic_cmpxchg(v, c, c + a)) != c) c = old; - return c != u; + return c; } -#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) - -static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr) +/** + * atomic_clear_mask - Atomically clear bits in atomic variable + * @mask: Mask of the bits to be cleared + * @v: pointer of type atomic_t + * + * Atomically clears the bits set in @mask from @v + */ +#ifndef atomic_clear_mask +static inline void atomic_clear_mask(unsigned long mask, atomic_t *v) { unsigned long flags; mask = ~mask; raw_local_irq_save(flags); /* Don't trace it in a irqsoff handler */ - *addr &= mask; + v->counter &= mask; raw_local_irq_restore(flags); } +#endif + +/** + * atomic_set_mask - Atomically set bits in atomic variable + * @mask: Mask of the bits to be set + * @v: pointer of type atomic_t + * + * Atomically sets the bits set in @mask in @v + */ +#ifndef atomic_set_mask +static inline void atomic_set_mask(unsigned int mask, atomic_t *v) +{ + unsigned long flags; + + raw_local_irq_save(flags); /* Don't trace it in a irqsoff handler */ + v->counter |= mask; + raw_local_irq_restore(flags); +} +#endif /* Assume that atomic operations are already serializing */ #define smp_mb__before_atomic_dec() barrier() @@ -156,7 +193,5 @@ static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr) #define smp_mb__before_atomic_inc() barrier() #define smp_mb__after_atomic_inc() barrier() -#include <asm-generic/atomic-long.h> - #endif /* __KERNEL__ */ #endif /* __ASM_GENERIC_ATOMIC_H */ diff --git a/include/asm-generic/bitops/ext2-atomic-setbit.h b/include/asm-generic/bitops/ext2-atomic-setbit.h new file mode 100644 index 000000000000..5a0997857b34 --- /dev/null +++ b/include/asm-generic/bitops/ext2-atomic-setbit.h @@ -0,0 +1,11 @@ +#ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_SETBIT_H_ +#define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_SETBIT_H_ + +/* + * Atomic bitops based version of ext2 atomic bitops + */ + +#define ext2_set_bit_atomic(l, nr, addr) test_and_set_bit_le(nr, addr) +#define ext2_clear_bit_atomic(l, nr, addr) test_and_clear_bit_le(nr, addr) + +#endif /* _ASM_GENERIC_BITOPS_EXT2_ATOMIC_SETBIT_H_ */ diff --git a/include/asm-generic/bitops/ext2-atomic.h b/include/asm-generic/bitops/ext2-atomic.h index ecf1c9d8a7cc..87f0f109d7f1 100644 --- a/include/asm-generic/bitops/ext2-atomic.h +++ b/include/asm-generic/bitops/ext2-atomic.h @@ -1,6 +1,10 @@ #ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_ #define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_ +/* + * Spinlock based version of ext2 atomic bitops + */ + #define ext2_set_bit_atomic(lock, nr, addr) \ ({ \ int ret; \ diff --git a/include/asm-generic/delay.h b/include/asm-generic/delay.h index 4586fec75ddb..0f79054ce7cd 100644 --- a/include/asm-generic/delay.h +++ b/include/asm-generic/delay.h @@ -1,9 +1,44 @@ #ifndef __ASM_GENERIC_DELAY_H #define __ASM_GENERIC_DELAY_H +/* Undefined functions to get compile-time errors */ +extern void __bad_udelay(void); +extern void __bad_ndelay(void); + extern void __udelay(unsigned long usecs); +extern void __ndelay(unsigned long nsecs); +extern void __const_udelay(unsigned long xloops); extern void __delay(unsigned long loops); -#define udelay(n) __udelay(n) +/* + * The weird n/20000 thing suppresses a "comparison is always false due to + * limited range of data type" warning with non-const 8-bit arguments. + */ + +/* 0x10c7 is 2**32 / 1000000 (rounded up) */ +#define udelay(n) \ + ({ \ + if (__builtin_constant_p(n)) { \ + if ((n) / 20000 >= 1) \ + __bad_udelay(); \ + else \ + __const_udelay((n) * 0x10c7ul); \ + } else { \ + __udelay(n); \ + } \ + }) + +/* 0x5 is 2**32 / 1000000000 (rounded up) */ +#define ndelay(n) \ + ({ \ + if (__builtin_constant_p(n)) { \ + if ((n) / 20000 >= 1) \ + __bad_ndelay(); \ + else \ + __const_udelay((n) * 5ul); \ + } else { \ + __ndelay(n); \ + } \ + }) #endif /* __ASM_GENERIC_DELAY_H */ diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h index e0ffa3ddb02a..912088773a69 100644 --- a/include/asm-generic/io.h +++ b/include/asm-generic/io.h @@ -307,7 +307,11 @@ static inline void *phys_to_virt(unsigned long address) /* * Change "struct page" to physical address. + * + * This implementation is for the no-MMU case only... if you have an MMU + * you'll need to provide your own definitions. */ +#ifndef CONFIG_MMU static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size) { return (void __iomem*) (unsigned long)offset; @@ -326,7 +330,9 @@ static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size) static inline void iounmap(void *addr) { } +#endif /* CONFIG_MMU */ +#ifdef CONFIG_HAS_IOPORT #ifndef CONFIG_GENERIC_IOMAP static inline void __iomem *ioport_map(unsigned long port, unsigned int nr) { @@ -340,9 +346,10 @@ static inline void ioport_unmap(void __iomem *p) extern void __iomem *ioport_map(unsigned long port, unsigned int nr); extern void ioport_unmap(void __iomem *p); #endif /* CONFIG_GENERIC_IOMAP */ +#endif /* CONFIG_HAS_IOPORT */ #define xlate_dev_kmem_ptr(p) p -#define xlate_dev_mem_ptr(p) ((void *) (p)) +#define xlate_dev_mem_ptr(p) __va(p) #ifndef virt_to_bus static inline unsigned long virt_to_bus(volatile void *address) diff --git a/include/asm-generic/iomap.h b/include/asm-generic/iomap.h index 76b0cc5637f8..98dcd76ce836 100644 --- a/include/asm-generic/iomap.h +++ b/include/asm-generic/iomap.h @@ -56,17 +56,29 @@ extern void iowrite8_rep(void __iomem *port, const void *buf, unsigned long coun extern void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count); extern void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count); +#ifdef CONFIG_HAS_IOPORT /* Create a virtual mapping cookie for an IO port range */ extern void __iomem *ioport_map(unsigned long port, unsigned int nr); extern void ioport_unmap(void __iomem *); +#endif #ifndef ARCH_HAS_IOREMAP_WC #define ioremap_wc ioremap_nocache #endif +#ifdef CONFIG_PCI /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ struct pci_dev; extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max); extern void pci_iounmap(struct pci_dev *dev, void __iomem *); +#else +struct pci_dev; +static inline void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max) +{ + return NULL; +} +static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) +{ } +#endif #endif diff --git a/include/asm-generic/local.h b/include/asm-generic/local.h index c8a5d68541d7..9ceb03b4f466 100644 --- a/include/asm-generic/local.h +++ b/include/asm-generic/local.h @@ -2,7 +2,7 @@ #define _ASM_GENERIC_LOCAL_H #include <linux/percpu.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include <asm/types.h> /* diff --git a/include/asm-generic/local64.h b/include/asm-generic/local64.h index 02ac760c1a8b..5980002b8b7b 100644 --- a/include/asm-generic/local64.h +++ b/include/asm-generic/local64.h @@ -55,7 +55,7 @@ typedef struct { #else /* BITS_PER_LONG != 64 */ -#include <asm/atomic.h> +#include <linux/atomic.h> /* Don't use typedef: don't want them to be mixed with atomic_t's. */ typedef struct { diff --git a/include/asm-generic/system.h b/include/asm-generic/system.h index 4b0b9cbbfae5..215efa74f5a2 100644 --- a/include/asm-generic/system.h +++ b/include/asm-generic/system.h @@ -14,7 +14,6 @@ #ifndef __ASM_GENERIC_SYSTEM_H #define __ASM_GENERIC_SYSTEM_H -#ifdef __KERNEL__ #ifndef __ASSEMBLY__ #include <linux/types.h> @@ -139,5 +138,4 @@ unsigned long __xchg(unsigned long x, volatile void *ptr, int size) #endif /* !__ASSEMBLY__ */ -#endif /* __KERNEL__ */ #endif /* __ASM_GENERIC_SYSTEM_H */ |