diff options
Diffstat (limited to 'arch/avr32/include')
| -rw-r--r-- | arch/avr32/include/asm/atomic.h | 2 | ||||
| -rw-r--r-- | arch/avr32/include/asm/barrier.h | 27 | ||||
| -rw-r--r-- | arch/avr32/include/asm/bitops.h | 1 | ||||
| -rw-r--r-- | arch/avr32/include/asm/bug.h | 5 | ||||
| -rw-r--r-- | arch/avr32/include/asm/cmpxchg.h | 117 | ||||
| -rw-r--r-- | arch/avr32/include/asm/exec.h | 13 | ||||
| -rw-r--r-- | arch/avr32/include/asm/special_insns.h | 13 | ||||
| -rw-r--r-- | arch/avr32/include/asm/switch_to.h | 46 | ||||
| -rw-r--r-- | arch/avr32/include/asm/system.h | 184 |
9 files changed, 228 insertions, 180 deletions
diff --git a/arch/avr32/include/asm/atomic.h b/arch/avr32/include/asm/atomic.h index e0ac2631c87e..61407279208a 100644 --- a/arch/avr32/include/asm/atomic.h +++ b/arch/avr32/include/asm/atomic.h @@ -15,7 +15,7 @@ #define __ASM_AVR32_ATOMIC_H #include <linux/types.h> -#include <asm/system.h> +#include <asm/cmpxchg.h> #define ATOMIC_INIT(i) { (i) } diff --git a/arch/avr32/include/asm/barrier.h b/arch/avr32/include/asm/barrier.h new file mode 100644 index 000000000000..808001c9cf8c --- /dev/null +++ b/arch/avr32/include/asm/barrier.h @@ -0,0 +1,27 @@ +/* + * Copyright (C) 2004-2006 Atmel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __ASM_AVR32_BARRIER_H +#define __ASM_AVR32_BARRIER_H + +#define mb() asm volatile("" : : : "memory") +#define rmb() mb() +#define wmb() asm volatile("sync 0" : : : "memory") +#define read_barrier_depends() do { } while(0) +#define set_mb(var, value) do { var = value; mb(); } while(0) + +#ifdef CONFIG_SMP +# error "The AVR32 port does not support SMP" +#else +# define smp_mb() barrier() +# define smp_rmb() barrier() +# define smp_wmb() barrier() +# define smp_read_barrier_depends() do { } while(0) +#endif + + +#endif /* __ASM_AVR32_BARRIER_H */ diff --git a/arch/avr32/include/asm/bitops.h b/arch/avr32/include/asm/bitops.h index b70c19bab63a..ebe7ad3f490b 100644 --- a/arch/avr32/include/asm/bitops.h +++ b/arch/avr32/include/asm/bitops.h @@ -13,7 +13,6 @@ #endif #include <asm/byteorder.h> -#include <asm/system.h> /* * clear_bit() doesn't provide any barrier for the compiler diff --git a/arch/avr32/include/asm/bug.h b/arch/avr32/include/asm/bug.h index 2aa373cc61b5..85a92d099adb 100644 --- a/arch/avr32/include/asm/bug.h +++ b/arch/avr32/include/asm/bug.h @@ -70,4 +70,9 @@ #include <asm-generic/bug.h> +struct pt_regs; +void die(const char *str, struct pt_regs *regs, long err); +void _exception(long signr, struct pt_regs *regs, int code, + unsigned long addr); + #endif /* __ASM_AVR32_BUG_H */ diff --git a/arch/avr32/include/asm/cmpxchg.h b/arch/avr32/include/asm/cmpxchg.h new file mode 100644 index 000000000000..962a6aeab787 --- /dev/null +++ b/arch/avr32/include/asm/cmpxchg.h @@ -0,0 +1,117 @@ +/* + * Atomic operations that C can't guarantee us. Useful for + * resource counting etc. + * + * But use these as seldom as possible since they are slower than + * regular operations. + * + * Copyright (C) 2004-2006 Atmel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __ASM_AVR32_CMPXCHG_H +#define __ASM_AVR32_CMPXCHG_H + +#define xchg(ptr,x) \ + ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) + +extern void __xchg_called_with_bad_pointer(void); + +static inline unsigned long xchg_u32(u32 val, volatile u32 *m) +{ + u32 ret; + + asm volatile("xchg %[ret], %[m], %[val]" + : [ret] "=&r"(ret), "=m"(*m) + : "m"(*m), [m] "r"(m), [val] "r"(val) + : "memory"); + return ret; +} + +static inline unsigned long __xchg(unsigned long x, + volatile void *ptr, + int size) +{ + switch(size) { + case 4: + return xchg_u32(x, ptr); + default: + __xchg_called_with_bad_pointer(); + return x; + } +} + +static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, + unsigned long new) +{ + __u32 ret; + + asm volatile( + "1: ssrf 5\n" + " ld.w %[ret], %[m]\n" + " cp.w %[ret], %[old]\n" + " brne 2f\n" + " stcond %[m], %[new]\n" + " brne 1b\n" + "2:\n" + : [ret] "=&r"(ret), [m] "=m"(*m) + : "m"(m), [old] "ir"(old), [new] "r"(new) + : "memory", "cc"); + return ret; +} + +extern unsigned long __cmpxchg_u64_unsupported_on_32bit_kernels( + volatile int * m, unsigned long old, unsigned long new); +#define __cmpxchg_u64 __cmpxchg_u64_unsupported_on_32bit_kernels + +/* 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); + +#define __HAVE_ARCH_CMPXCHG 1 + +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); + case 8: + return __cmpxchg_u64(ptr, old, new); + } + + __cmpxchg_called_with_bad_pointer(); + return old; +} + +#define cmpxchg(ptr, old, new) \ + ((typeof(*(ptr)))__cmpxchg((ptr), (unsigned long)(old), \ + (unsigned long)(new), \ + 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_u32(ptr, old, new); + default: + return __cmpxchg_local_generic(ptr, old, new, size); + } + + return old; +} + +#define cmpxchg_local(ptr, old, new) \ + ((typeof(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(old), \ + (unsigned long)(new), \ + sizeof(*(ptr)))) + +#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) + +#endif /* __ASM_AVR32_CMPXCHG_H */ diff --git a/arch/avr32/include/asm/exec.h b/arch/avr32/include/asm/exec.h new file mode 100644 index 000000000000..f467be8bf823 --- /dev/null +++ b/arch/avr32/include/asm/exec.h @@ -0,0 +1,13 @@ +/* + * Copyright (C) 2004-2006 Atmel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __ASM_AVR32_EXEC_H +#define __ASM_AVR32_EXEC_H + +#define arch_align_stack(x) (x) + +#endif /* __ASM_AVR32_EXEC_H */ diff --git a/arch/avr32/include/asm/special_insns.h b/arch/avr32/include/asm/special_insns.h new file mode 100644 index 000000000000..f922218dfaa5 --- /dev/null +++ b/arch/avr32/include/asm/special_insns.h @@ -0,0 +1,13 @@ +/* + * Copyright (C) 2004-2006 Atmel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __ASM_AVR32_SPECIAL_INSNS_H +#define __ASM_AVR32_SPECIAL_INSNS_H + +#define nop() asm volatile("nop") + +#endif /* __ASM_AVR32_SPECIAL_INSNS_H */ diff --git a/arch/avr32/include/asm/switch_to.h b/arch/avr32/include/asm/switch_to.h new file mode 100644 index 000000000000..9a8e9d5208d4 --- /dev/null +++ b/arch/avr32/include/asm/switch_to.h @@ -0,0 +1,46 @@ +/* + * Copyright (C) 2004-2006 Atmel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __ASM_AVR32_SWITCH_TO_H +#define __ASM_AVR32_SWITCH_TO_H + +/* + * Help PathFinder and other Nexus-compliant debuggers keep track of + * the current PID by emitting an Ownership Trace Message each time we + * switch task. + */ +#ifdef CONFIG_OWNERSHIP_TRACE +#include <asm/ocd.h> +#define finish_arch_switch(prev) \ + do { \ + ocd_write(PID, prev->pid); \ + ocd_write(PID, current->pid); \ + } while(0) +#endif + +/* + * switch_to(prev, next, last) should switch from task `prev' to task + * `next'. `prev' will never be the same as `next'. + * + * We just delegate everything to the __switch_to assembly function, + * which is implemented in arch/avr32/kernel/switch_to.S + * + * mb() tells GCC not to cache `current' across this call. + */ +struct cpu_context; +struct task_struct; +extern struct task_struct *__switch_to(struct task_struct *, + struct cpu_context *, + struct cpu_context *); +#define switch_to(prev, next, last) \ + do { \ + last = __switch_to(prev, &prev->thread.cpu_context + 1, \ + &next->thread.cpu_context); \ + } while (0) + + +#endif /* __ASM_AVR32_SWITCH_TO_H */ diff --git a/arch/avr32/include/asm/system.h b/arch/avr32/include/asm/system.h index 62d9ded01635..0d84f9e42fde 100644 --- a/arch/avr32/include/asm/system.h +++ b/arch/avr32/include/asm/system.h @@ -1,178 +1,6 @@ -/* - * Copyright (C) 2004-2006 Atmel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#ifndef __ASM_AVR32_SYSTEM_H -#define __ASM_AVR32_SYSTEM_H - -#include <linux/compiler.h> -#include <linux/linkage.h> -#include <linux/types.h> - -#include <asm/ptrace.h> -#include <asm/sysreg.h> - -#define xchg(ptr,x) \ - ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) - -#define nop() asm volatile("nop") - -#define mb() asm volatile("" : : : "memory") -#define rmb() mb() -#define wmb() asm volatile("sync 0" : : : "memory") -#define read_barrier_depends() do { } while(0) -#define set_mb(var, value) do { var = value; mb(); } while(0) - -/* - * Help PathFinder and other Nexus-compliant debuggers keep track of - * the current PID by emitting an Ownership Trace Message each time we - * switch task. - */ -#ifdef CONFIG_OWNERSHIP_TRACE -#include <asm/ocd.h> -#define finish_arch_switch(prev) \ - do { \ - ocd_write(PID, prev->pid); \ - ocd_write(PID, current->pid); \ - } while(0) -#endif - -/* - * switch_to(prev, next, last) should switch from task `prev' to task - * `next'. `prev' will never be the same as `next'. - * - * We just delegate everything to the __switch_to assembly function, - * which is implemented in arch/avr32/kernel/switch_to.S - * - * mb() tells GCC not to cache `current' across this call. - */ -struct cpu_context; -struct task_struct; -extern struct task_struct *__switch_to(struct task_struct *, - struct cpu_context *, - struct cpu_context *); -#define switch_to(prev, next, last) \ - do { \ - last = __switch_to(prev, &prev->thread.cpu_context + 1, \ - &next->thread.cpu_context); \ - } while (0) - -#ifdef CONFIG_SMP -# error "The AVR32 port does not support SMP" -#else -# define smp_mb() barrier() -# define smp_rmb() barrier() -# define smp_wmb() barrier() -# define smp_read_barrier_depends() do { } while(0) -#endif - -#include <linux/irqflags.h> - -extern void __xchg_called_with_bad_pointer(void); - -static inline unsigned long xchg_u32(u32 val, volatile u32 *m) -{ - u32 ret; - - asm volatile("xchg %[ret], %[m], %[val]" - : [ret] "=&r"(ret), "=m"(*m) - : "m"(*m), [m] "r"(m), [val] "r"(val) - : "memory"); - return ret; -} - -static inline unsigned long __xchg(unsigned long x, - volatile void *ptr, - int size) -{ - switch(size) { - case 4: - return xchg_u32(x, ptr); - default: - __xchg_called_with_bad_pointer(); - return x; - } -} - -static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, - unsigned long new) -{ - __u32 ret; - - asm volatile( - "1: ssrf 5\n" - " ld.w %[ret], %[m]\n" - " cp.w %[ret], %[old]\n" - " brne 2f\n" - " stcond %[m], %[new]\n" - " brne 1b\n" - "2:\n" - : [ret] "=&r"(ret), [m] "=m"(*m) - : "m"(m), [old] "ir"(old), [new] "r"(new) - : "memory", "cc"); - return ret; -} - -extern unsigned long __cmpxchg_u64_unsupported_on_32bit_kernels( - volatile int * m, unsigned long old, unsigned long new); -#define __cmpxchg_u64 __cmpxchg_u64_unsupported_on_32bit_kernels - -/* 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); - -#define __HAVE_ARCH_CMPXCHG 1 - -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); - case 8: - return __cmpxchg_u64(ptr, old, new); - } - - __cmpxchg_called_with_bad_pointer(); - return old; -} - -#define cmpxchg(ptr, old, new) \ - ((typeof(*(ptr)))__cmpxchg((ptr), (unsigned long)(old), \ - (unsigned long)(new), \ - 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_u32(ptr, old, new); - default: - return __cmpxchg_local_generic(ptr, old, new, size); - } - - return old; -} - -#define cmpxchg_local(ptr, old, new) \ - ((typeof(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(old), \ - (unsigned long)(new), \ - sizeof(*(ptr)))) - -#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) - -struct pt_regs; -void die(const char *str, struct pt_regs *regs, long err); -void _exception(long signr, struct pt_regs *regs, int code, - unsigned long addr); - -#define arch_align_stack(x) (x) - -#endif /* __ASM_AVR32_SYSTEM_H */ +/* FILE TO BE DELETED. DO NOT ADD STUFF HERE! */ +#include <asm/barrier.h> +#include <asm/cmpxchg.h> +#include <asm/exec.h> +#include <asm/special_insns.h> +#include <asm/switch_to.h> |