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Diffstat (limited to 'include/asm-sh64/system.h')
| -rw-r--r-- | include/asm-sh64/system.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/include/asm-sh64/system.h b/include/asm-sh64/system.h new file mode 100644 index 0000000..42510e4 --- /dev/null +++ b/include/asm-sh64/system.h @@ -0,0 +1,195 @@ +#ifndef __ASM_SH64_SYSTEM_H +#define __ASM_SH64_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. + * + * include/asm-sh64/system.h + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003 Paul Mundt + * Copyright (C) 2004 Richard Curnow + * + */ + +#include <linux/config.h> +#include <asm/registers.h> +#include <asm/processor.h> + +/* + * switch_to() should switch tasks to task nr n, first + */ + +typedef struct { + unsigned long seg; +} mm_segment_t; + +extern struct task_struct *sh64_switch_to(struct task_struct *prev, + struct thread_struct *prev_thread, + struct task_struct *next, + struct thread_struct *next_thread); + +#define switch_to(prev,next,last) \ + do {\ + if (last_task_used_math != next) {\ + struct pt_regs *regs = next->thread.uregs;\ + if (regs) regs->sr |= SR_FD;\ + }\ + last = sh64_switch_to(prev, &prev->thread, next, &next->thread);\ + } while(0) + +#define nop() __asm__ __volatile__ ("nop") + +#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) + +#define tas(ptr) (xchg((ptr), 1)) + +extern void __xchg_called_with_bad_pointer(void); + +#define mb() __asm__ __volatile__ ("synco": : :"memory") +#define rmb() mb() +#define wmb() __asm__ __volatile__ ("synco": : :"memory") +#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() +#else +#define smp_mb() barrier() +#define smp_rmb() barrier() +#define smp_wmb() barrier() +#define smp_read_barrier_depends() do { } while (0) +#endif /* CONFIG_SMP */ + +#define set_rmb(var, value) do { xchg(&var, value); } while (0) +#define set_mb(var, value) set_rmb(var, value) +#define set_wmb(var, value) do { var = value; wmb(); } while (0) + +/* Interrupt Control */ +#ifndef HARD_CLI +#define SR_MASK_L 0x000000f0L +#define SR_MASK_LL 0x00000000000000f0LL +#else +#define SR_MASK_L 0x10000000L +#define SR_MASK_LL 0x0000000010000000LL +#endif + +static __inline__ void local_irq_enable(void) +{ + /* cli/sti based on SR.BL */ + unsigned long long __dummy0, __dummy1=~SR_MASK_LL; + + __asm__ __volatile__("getcon " __SR ", %0\n\t" + "and %0, %1, %0\n\t" + "putcon %0, " __SR "\n\t" + : "=&r" (__dummy0) + : "r" (__dummy1)); +} + +static __inline__ void local_irq_disable(void) +{ + /* cli/sti based on SR.BL */ + unsigned long long __dummy0, __dummy1=SR_MASK_LL; + __asm__ __volatile__("getcon " __SR ", %0\n\t" + "or %0, %1, %0\n\t" + "putcon %0, " __SR "\n\t" + : "=&r" (__dummy0) + : "r" (__dummy1)); +} + +#define local_save_flags(x) \ +(__extension__ ({ unsigned long long __dummy=SR_MASK_LL; \ + __asm__ __volatile__( \ + "getcon " __SR ", %0\n\t" \ + "and %0, %1, %0" \ + : "=&r" (x) \ + : "r" (__dummy));})) + +#define local_irq_save(x) \ +(__extension__ ({ unsigned long long __d2=SR_MASK_LL, __d1; \ + __asm__ __volatile__( \ + "getcon " __SR ", %1\n\t" \ + "or %1, r63, %0\n\t" \ + "or %1, %2, %1\n\t" \ + "putcon %1, " __SR "\n\t" \ + "and %0, %2, %0" \ + : "=&r" (x), "=&r" (__d1) \ + : "r" (__d2));})); + +#define local_irq_restore(x) do { \ + if ( ((x) & SR_MASK_L) == 0 ) /* dropping to 0 ? */ \ + local_irq_enable(); /* yes...re-enable */ \ +} while (0) + +#define irqs_disabled() \ +({ \ + unsigned long flags; \ + local_save_flags(flags); \ + (flags != 0); \ +}) + +extern __inline__ unsigned long xchg_u32(volatile int * m, unsigned long val) +{ + unsigned long flags, retval; + + local_irq_save(flags); + retval = *m; + *m = val; + local_irq_restore(flags); + return retval; +} + +extern __inline__ unsigned long xchg_u8(volatile unsigned char * m, unsigned long val) +{ + unsigned long flags, retval; + + local_irq_save(flags); + retval = *m; + *m = val & 0xff; + local_irq_restore(flags); + return retval; +} + +static __inline__ unsigned long __xchg(unsigned long x, volatile void * ptr, int size) +{ + switch (size) { + case 4: + return xchg_u32(ptr, x); + break; + case 1: + return xchg_u8(ptr, x); + break; + } + __xchg_called_with_bad_pointer(); + return x; +} + +/* XXX + * disable hlt during certain critical i/o operations + */ +#define HAVE_DISABLE_HLT +void disable_hlt(void); +void enable_hlt(void); + + +#define smp_mb() barrier() +#define smp_rmb() barrier() +#define smp_wmb() barrier() + +#ifdef CONFIG_SH_ALPHANUMERIC +/* This is only used for debugging. */ +extern void print_seg(char *file,int line); +#define PLS() print_seg(__FILE__,__LINE__) +#else /* CONFIG_SH_ALPHANUMERIC */ +#define PLS() +#endif /* CONFIG_SH_ALPHANUMERIC */ + +#define PL() printk("@ <%s,%s:%d>\n",__FILE__,__FUNCTION__,__LINE__) + +#define arch_align_stack(x) (x) + +#endif /* __ASM_SH64_SYSTEM_H */ |