include/asm-sh64/system.h

   1 #ifndef __ASM_SH64_SYSTEM_H
   2 #define __ASM_SH64_SYSTEM_H
   3
   4 /*
   5  * This file is subject to the terms and conditions of the GNU General Public
   6  * License.  See the file "COPYING" in the main directory of this archive
   7  * for more details.
   8  *
   9  * include/asm-sh64/system.h
  10  *
  11  * Copyright (C) 2000, 2001  Paolo Alberelli
  12  * Copyright (C) 2003  Paul Mundt
  13  *
  14  */
  15
  16 #include <linux/config.h>
  17 #include <asm/registers.h>
  18
  19 /*
  20  *      switch_to() should switch tasks to task nr n, first
  21  */
  22
  23 typedef struct {
  24         unsigned long seg;
  25 } mm_segment_t;
  26
  27 #ifdef CONFIG_SMP
  28 #error "no SMP SH64"
  29 #else
  30 #define prepare_to_switch()     do { } while(0)
  31 #ifndef CS_SAVE_ALL
  32 #define SAVE_CALLER_SAVED
  33 #define RESTORE_CALLER_SAVED
  34 #else
  35 #define SAVE_CALLER_SAVED \
  36  __asm__ __volatile__("addi.l   r15, -256, r15\n\t"             \
  37                       "st.q     r15, 0, r0\n\t"                 \
  38                       "st.q     r15, 8, r1\n\t"                 \
  39                       "st.q     r15, 16, r2\n\t"                \
  40                       "st.q     r15, 24, r3\n\t"                \
  41                       "st.q     r15, 32, r4\n\t"                \
  42                       "st.q     r15, 40, r5\n\t"                \
  43                       "st.q     r15, 48, r6\n\t"                \
  44                       "st.q     r15, 56, r7\n\t"                \
  45                       "st.q     r15, 64, r8\n\t"                \
  46                       "st.q     r15, 72, r9\n\t"                \
  47                       "st.q     r15, 80, r17\n\t"               \
  48                       "st.q     r15, 88, r19\n\t"               \
  49                       "st.q     r15, 96, r20\n\t"               \
  50                       "st.q     r15, 104, r21\n\t"              \
  51                       "st.q     r15, 112, r22\n\t"              \
  52                       "st.q     r15, 120, r23\n\t"              \
  53                       "st.q     r15, 128, r36\n\t"              \
  54                       "st.q     r15, 136, r37\n\t"              \
  55                       "st.q     r15, 144, r38\n\t"              \
  56                       "st.q     r15, 152, r39\n\t"              \
  57                       "st.q     r15, 160, r40\n\t"              \
  58                       "st.q     r15, 168, r41\n\t"              \
  59                       "st.q     r15, 176, r42\n\t"              \
  60                       "st.q     r15, 184, r43\n\t"              \
  61                       "st.q     r15, 192, r60\n\t"              \
  62                       "st.q     r15, 200, r61\n\t"              \
  63                       "st.q     r15, 208, r62\n\t"              \
  64                       "gettr    " __t0 ", r0\n\t"                       \
  65                       "st.q     r15, 216, r0\n\t"               \
  66                       "gettr    " __t1 ", r1\n\t"                       \
  67                       "st.q     r15, 224, r1\n\t"               \
  68                       "gettr    " __t2 ", r2\n\t"                       \
  69                       "st.q     r15, 232, r2\n\t"               \
  70                       "gettr    " __t3 ", r3\n\t"                       \
  71                       "st.q     r15, 240, r3\n\t"               \
  72                       "gettr    " __t4 ", r4\n\t"                       \
  73                       "st.q     r15, 248, r4\n\t");
  74
  75 /* Note. Do not restore r42 ! */
  76 #define RESTORE_CALLER_SAVED \
  77  __asm__ __volatile__("ld.q     r15, 216, r0\n\t"               \
  78                       "ptabs    r0, " __t0 "\n\t"               \
  79                       "ld.q     r15, 224, r1\n\t"               \
  80                       "ptabs    r1, " __t1 "\n\t"               \
  81                       "ld.q     r15, 232, r2\n\t"               \
  82                       "ptabs    r2, " __t2 "\n\t"               \
  83                       "ld.q     r15, 240, r3\n\t"               \
  84                       "ptabs    r3, " __t3 "\n\t"               \
  85                       "ld.q     r15, 248, r4\n\t"               \
  86                       "ptabs    r4, " __t4 "\n\t"               \
  87                       "ld.q     r15, 0, r0\n\t"                 \
  88                       "ld.q     r15, 8, r1\n\t"                 \
  89                       "ld.q     r15, 16, r2\n\t"                \
  90                       "ld.q     r15, 24, r3\n\t"                \
  91                       "ld.q     r15, 32, r4\n\t"                \
  92                       "ld.q     r15, 40, r5\n\t"                \
  93                       "ld.q     r15, 48, r6\n\t"                \
  94                       "ld.q     r15, 56, r7\n\t"                \
  95                       "ld.q     r15, 64, r8\n\t"                \
  96                       "ld.q     r15, 72, r9\n\t"                \
  97                       "ld.q     r15, 80, r17\n\t"               \
  98                       "ld.q     r15, 88, r19\n\t"               \
  99                       "ld.q     r15, 96, r20\n\t"               \
 100                       "ld.q     r15, 104, r21\n\t"              \
 101                       "ld.q     r15, 112, r22\n\t"              \
 102                       "ld.q     r15, 120, r23\n\t"              \
 103                       "ld.q     r15, 128, r36\n\t"              \
 104                       "ld.q     r15, 136, r37\n\t"              \
 105                       "ld.q     r15, 144, r38\n\t"              \
 106                       "ld.q     r15, 152, r39\n\t"              \
 107                       "ld.q     r15, 160, r40\n\t"              \
 108                       "ld.q     r15, 168, r41\n\t"              \
 109                       "ld.q     r15, 184, r43\n\t"              \
 110                       "ld.q     r15, 192, r60\n\t"              \
 111                       "ld.q     r15, 200, r61\n\t"              \
 112                       "ld.q     r15, 208, r62\n\t"              \
 113                       "addi.l   r15, 256, r15\n\t");
 114 #endif
 115
 116 #define switch_to(prev,next,last) do { \
 117  register unsigned long *      r36 __asm__ ("r36");             \
 118  register unsigned long *      r37 __asm__ ("r37");             \
 119  register unsigned long long   r38 __asm__ ("r38");             \
 120  register unsigned long long   r39 __asm__ ("r39");             \
 121  register unsigned long *      r40 __asm__ ("r40");             \
 122  register unsigned long *      r41 __asm__ ("r41");             \
 123  register struct task_struct * r42 __asm__ ("r42");             \
 124                                                                 \
 125 /* printk("switch_to prev %08x next %08x last %08x\n", prev, next,last);  */ \
 126  if (last_task_used_math != next) {                             \
 127   struct pt_regs* regs;                                         \
 128   regs = next->thread.kregs;                                    \
 129   regs->sr |= SR_FD;                                            \
 130  }                                                              \
 131                                                                 \
 132  SAVE_CALLER_SAVED                                              \
 133                                                                 \
 134  r36 = &prev->thread.sp;                                        \
 135  r37 = &prev->thread.pc;                                        \
 136                                                                 \
 137  /* Note that we always are in kernel space */                  \
 138  r38 = next->thread.sp | NEFF_MASK;                             \
 139  r39 = next->thread.pc | NEFF_MASK;                             \
 140                                                                 \
 141  r40 = (unsigned long *) prev;                                  \
 142  r41 = (unsigned long *) next;                                  \
 143                                                                 \
 144  __asm__ __volatile__("addi.l   r15, -304, r15\n\t"             \
 145                       "st.q     r15, 0, r10\n\t"                \
 146                       "st.q     r15, 8, r11\n\t"                \
 147                       "st.q     r15, 16, r12\n\t"               \
 148                       "st.q     r15, 24, r13\n\t"               \
 149                       "st.q     r15, 32, r14\n\t"               \
 150                       "st.q     r15, 40, r16\n\t"               \
 151                       "st.q     r15, 48, r18\n\t"               \
 152                       "st.q     r15, 56, r24\n\t"               \
 153                       "st.q     r15, 64, r25\n\t"               \
 154                       "st.q     r15, 72, r26\n\t"               \
 155                       "st.q     r15, 80, r27\n\t"               \
 156                       "st.q     r15, 88, r28\n\t"               \
 157                       "st.q     r15, 96, r29\n\t"               \
 158                       "st.q     r15, 104, r30\n\t"              \
 159                       "st.q     r15, 112, r31\n\t"              \
 160                       "st.q     r15, 120, r32\n\t"              \
 161                       "st.q     r15, 128, r33\n\t"              \
 162                       "st.q     r15, 136, r34\n\t"              \
 163                       "st.q     r15, 144, r35\n\t"              \
 164                       "st.q     r15, 152, r44\n\t"              \
 165                       "st.q     r15, 160, r45\n\t"              \
 166                       "st.q     r15, 168, r46\n\t"              \
 167                       "st.q     r15, 176, r47\n\t"              \
 168                       "st.q     r15, 184, r48\n\t"              \
 169                       "st.q     r15, 192, r49\n\t"              \
 170                       "st.q     r15, 200, r50\n\t"              \
 171                       "st.q     r15, 208, r51\n\t"              \
 172                       "st.q     r15, 216, r52\n\t"              \
 173                       "st.q     r15, 224, r53\n\t"              \
 174                       "st.q     r15, 232, r54\n\t"              \
 175                       "st.q     r15, 240, r55\n\t"              \
 176                       "st.q     r15, 248, r56\n\t"              \
 177                       "st.q     r15, 256, r57\n\t"              \
 178                       "st.q     r15, 264, r58\n\t"              \
 179                       "st.q     r15, 272, r59\n\t"              \
 180                       "gettr    " __t5 ", r55\n\t"              \
 181                       "st.q     r15, 280, r55\n\t"              \
 182                       "gettr    " __t6 ", r56\n\t"              \
 183                       "st.q     r15, 288, r56\n\t"              \
 184                       "gettr    " __t7 ", r57\n\t"              \
 185                       "st.q     r15, 296, r57\n\t"              \
 186                       "_loada   __switch_to, r18\n\t"  \
 187                       "ptabs    r18, " __t5 "\n\t"              \
 188                       "_pta     36, " __t6 "\n\t"               \
 189                       "gettr    " __t6 ", r18\n\t"              \
 190                       "st.l     %1, 0, r15\n\t"                 \
 191                       "st.l     %2, 0, r18\n\t"                 \
 192                       "or       %3, r63, r15\n\t"               \
 193                       "or       %4, r63, r18\n\t"               \
 194                       "or       %5, r63, r2\n\t"                \
 195                       "or       %6, r63, r3\n\t"                \
 196                       "blink    " __t5 ", r63\n\t"              \
 197                       "or       r2, r63, %0\n\t"                \
 198                       "ld.q     r15, 280, r55\n\t"              \
 199                       "ptabs    r55, " __t5 "\n\t"              \
 200                       "ld.q     r15, 288, r56\n\t"              \
 201                       "ptabs    r56, " __t6 "\n\t"              \
 202                       "ld.q     r15, 296, r57\n\t"              \
 203                       "ptabs    r57, " __t7 "\n\t"              \
 204                       "ld.q     r15, 0, r10\n\t"                \
 205                       "ld.q     r15, 8, r11\n\t"                \
 206                       "ld.q     r15, 16, r12\n\t"               \
 207                       "ld.q     r15, 24, r13\n\t"               \
 208                       "ld.q     r15, 32, r14\n\t"               \
 209                       "ld.q     r15, 40, r16\n\t"               \
 210                       "ld.q     r15, 48, r18\n\t"               \
 211                       "ld.q     r15, 56, r24\n\t"               \
 212                       "ld.q     r15, 64, r25\n\t"               \
 213                       "ld.q     r15, 72, r26\n\t"               \
 214                       "ld.q     r15, 80, r27\n\t"               \
 215                       "ld.q     r15, 88, r28\n\t"               \
 216                       "ld.q     r15, 96, r29\n\t"               \
 217                       "ld.q     r15, 104, r30\n\t"              \
 218                       "ld.q     r15, 112, r31\n\t"              \
 219                       "ld.q     r15, 120, r32\n\t"              \
 220                       "ld.q     r15, 128, r33\n\t"              \
 221                       "ld.q     r15, 136, r34\n\t"              \
 222                       "ld.q     r15, 144, r35\n\t"              \
 223                       "ld.q     r15, 152, r44\n\t"              \
 224                       "ld.q     r15, 160, r45\n\t"              \
 225                       "ld.q     r15, 168, r46\n\t"              \
 226                       "ld.q     r15, 176, r47\n\t"              \
 227                       "ld.q     r15, 184, r48\n\t"              \
 228                       "ld.q     r15, 192, r49\n\t"              \
 229                       "ld.q     r15, 200, r50\n\t"              \
 230                       "ld.q     r15, 208, r51\n\t"              \
 231                       "ld.q     r15, 216, r52\n\t"              \
 232                       "ld.q     r15, 224, r53\n\t"              \
 233                       "ld.q     r15, 232, r54\n\t"              \
 234                       "ld.q     r15, 240, r55\n\t"              \
 235                       "ld.q     r15, 248, r56\n\t"              \
 236                       "ld.q     r15, 256, r57\n\t"              \
 237                       "ld.q     r15, 264, r58\n\t"              \
 238                       "ld.q     r15, 272, r59\n\t"              \
 239                       "addi.l   r15, 304, r15\n\t"              \
 240                       : "=r" (r42)                              \
 241                       : "r" (r36), "r" (r37), "r" (r38),        \
 242                         "r" (r39), "r" (r40), "r" (r41));       \
 243  RESTORE_CALLER_SAVED                                           \
 244   last = r42;                                                   \
 245 } while (0)
 246 #endif
 247
 248 #define nop() __asm__ __volatile__ ("nop")
 249
 250 #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
 251
 252 #define tas(ptr) (xchg((ptr), 1))
 253
 254 extern void __xchg_called_with_bad_pointer(void);
 255
 256 #define mb()    __asm__ __volatile__ ("synco": : :"memory")
 257 #define rmb()   mb()
 258 #define wmb()   __asm__ __volatile__ ("synco": : :"memory")
 259 #define set_rmb(var, value) do { xchg(&var, value); } while (0)
 260 #define set_mb(var, value) set_rmb(var, value)
 261 #define set_wmb(var, value) do { var = value; wmb(); } while (0)
 262
 263 /* Interrupt Control */
 264 #ifndef HARD_CLI
 265 #define SR_MASK_L 0x000000f0L
 266 #define SR_MASK_LL 0x00000000000000f0LL
 267 #else
 268 #define SR_MASK_L 0x10000000L
 269 #define SR_MASK_LL 0x0000000010000000LL
 270 #endif
 271
 272 extern __inline__ void __sti(void)
 273 {
 274         /* cli/sti based on SR.BL */
 275         unsigned long long __dummy0, __dummy1=~SR_MASK_LL;
 276
 277         __asm__ __volatile__("getcon    " __c0 ", %0\n\t"
 278                              "and       %0, %1, %0\n\t"
 279                              "putcon    %0, " __c0 "\n\t"
 280                              : "=&r" (__dummy0)
 281                              : "r" (__dummy1));
 282 }
 283
 284 extern __inline__ void __cli(void)
 285 {
 286         /* cli/sti based on SR.BL */
 287         unsigned long long __dummy0, __dummy1=SR_MASK_LL;
 288         __asm__ __volatile__("getcon    " __c0 ", %0\n\t"
 289                              "or        %0, %1, %0\n\t"
 290                              "putcon    %0, " __c0 "\n\t"
 291                              : "=&r" (__dummy0)
 292                              : "r" (__dummy1));
 293 }
 294
 295 #define __save_flags(x)                                                 \
 296 (__extension__ ({       unsigned long long __dummy=SR_MASK_LL;          \
 297         __asm__ __volatile__(                                           \
 298                 "getcon " __c0 ", %0\n\t"                               \
 299                 "and    %0, %1, %0"                                     \
 300                 : "=&r" (x)                                             \
 301                 : "r" (__dummy));}))
 302
 303 #define __save_and_cli(x)                                                       \
 304 (__extension__ ({       unsigned long long __d2=SR_MASK_LL, __d1;       \
 305         __asm__ __volatile__(                                           \
 306                 "getcon " __c0 ", %1\n\t"                               \
 307                 "or     %1, r63, %0\n\t"                                \
 308                 "or     %1, %2, %1\n\t"                                 \
 309                 "putcon %1, " __c0 "\n\t"                               \
 310                 "and    %0, %2, %0"                                     \
 311                 : "=&r" (x), "=&r" (__d1)                               \
 312                 : "r" (__d2));}));
 313
 314 #define __restore_flags(x) do {                                         \
 315         if ( ((x) & SR_MASK_L) == 0 )           /* dropping to 0 ? */   \
 316                 __sti();                        /* yes...re-enable */   \
 317 } while (0)
 318
 319 #define __save_and_sti(x)       do { __save_flags(x); __sti(); } while (0)
 320
 321 /* For spinlocks etc */
 322 #define local_irq_save(x)       __save_and_cli(x)
 323 #define local_irq_set(x)        __save_and_sti(x)
 324 #define local_irq_restore(x)    __restore_flags(x)
 325 #define local_irq_disable()     __cli()
 326 #define local_irq_enable()      __sti()
 327
 328 #ifdef CONFIG_SMP
 329
 330 extern void __global_cli(void);
 331 extern void __global_sti(void);
 332 extern unsigned long __global_save_flags(void);
 333 extern void __global_restore_flags(unsigned long);
 334 #define cli() __global_cli()
 335 #define sti() __global_sti()
 336 #define save_flags(x) ((x)=__global_save_flags())
 337 #define restore_flags(x) __global_restore_flags(x)
 338 #define save_and_sti(x) do { save_flags(x); sti(x); } while (0)
 339
 340 #else
 341
 342 #define cli() __cli()
 343 #define sti() __sti()
 344 #define save_flags(x) __save_flags(x)
 345 #define save_and_cli(x) __save_and_cli(x)
 346 #define restore_flags(x) __restore_flags(x)
 347 #define save_and_sti(x) __save_and_sti(x)
 348
 349 #endif
 350
 351 extern __inline__ unsigned long xchg_u32(volatile int * m, unsigned long val)
 352 {
 353         unsigned long flags, retval;
 354
 355         save_and_cli(flags);
 356         retval = *m;
 357         *m = val;
 358         restore_flags(flags);
 359         return retval;
 360 }
 361
 362 extern __inline__ unsigned long xchg_u8(volatile unsigned char * m, unsigned long val)
 363 {
 364         unsigned long flags, retval;
 365
 366         save_and_cli(flags);
 367         retval = *m;
 368         *m = val & 0xff;
 369         restore_flags(flags);
 370         return retval;
 371 }
 372
 373 static __inline__ unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
 374 {
 375         switch (size) {
 376         case 4:
 377                 return xchg_u32(ptr, x);
 378                 break;
 379         case 1:
 380                 return xchg_u8(ptr, x);
 381                 break;
 382         }
 383         __xchg_called_with_bad_pointer();
 384         return x;
 385 }
 386
 387 /* XXX
 388  * disable hlt during certain critical i/o operations
 389  */
 390 #define HAVE_DISABLE_HLT
 391 void disable_hlt(void);
 392 void enable_hlt(void);
 393
 394
 395 #define smp_mb()        barrier()
 396 #define smp_rmb()       barrier()
 397 #define smp_wmb()       barrier()
 398
 399 extern void print_seg(char *file,int line);
 400
 401 #define PLS() print_seg(__FILE__,__LINE__)
 402
 403 #define PL() printk("@ <%s,%s:%d>\n",__FILE__,__FUNCTION__,__LINE__)
 404
 405 #endif /* __ASM_SH64_SYSTEM_H */