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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 | #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); \ }) static 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; } static 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 */ |