arch/alpha/include/asm/system.h

   1 #ifndef __ALPHA_SYSTEM_H
   2 #define __ALPHA_SYSTEM_H
   3
   4 #include <asm/pal.h>
   5 #include <asm/page.h>
   6 #include <asm/barrier.h>
   7
   8 /*
   9  * System defines.. Note that this is included both from .c and .S
  10  * files, so it does only defines, not any C code.
  11  */
  12
  13 /*
  14  * We leave one page for the initial stack page, and one page for
  15  * the initial process structure. Also, the console eats 3 MB for
  16  * the initial bootloader (one of which we can reclaim later).
  17  */
  18 #define BOOT_PCB        0x20000000
  19 #define BOOT_ADDR       0x20000000
  20 /* Remove when official MILO sources have ELF support: */
  21 #define BOOT_SIZE       (16*1024)
  22
  23 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
  24 #define KERNEL_START_PHYS       0x300000 /* Old bootloaders hardcoded this.  */
  25 #else
  26 #define KERNEL_START_PHYS       0x1000000 /* required: Wildfire/Titan/Marvel */
  27 #endif
  28
  29 #define KERNEL_START    (PAGE_OFFSET+KERNEL_START_PHYS)
  30 #define SWAPPER_PGD     KERNEL_START
  31 #define INIT_STACK      (PAGE_OFFSET+KERNEL_START_PHYS+0x02000)
  32 #define EMPTY_PGT       (PAGE_OFFSET+KERNEL_START_PHYS+0x04000)
  33 #define EMPTY_PGE       (PAGE_OFFSET+KERNEL_START_PHYS+0x08000)
  34 #define ZERO_PGE        (PAGE_OFFSET+KERNEL_START_PHYS+0x0A000)
  35
  36 #define START_ADDR      (PAGE_OFFSET+KERNEL_START_PHYS+0x10000)
  37
  38 /*
  39  * This is setup by the secondary bootstrap loader.  Because
  40  * the zero page is zeroed out as soon as the vm system is
  41  * initialized, we need to copy things out into a more permanent
  42  * place.
  43  */
  44 #define PARAM                   ZERO_PGE
  45 #define COMMAND_LINE            ((char*)(PARAM + 0x0000))
  46 #define INITRD_START            (*(unsigned long *) (PARAM+0x100))
  47 #define INITRD_SIZE             (*(unsigned long *) (PARAM+0x108))
  48
  49 #ifndef __ASSEMBLY__
  50 #include <linux/kernel.h>
  51 #define AT_VECTOR_SIZE_ARCH 4 /* entries in ARCH_DLINFO */
  52
  53 /*
  54  * This is the logout header that should be common to all platforms
  55  * (assuming they are running OSF/1 PALcode, I guess).
  56  */
  57 struct el_common {
  58         unsigned int    size;           /* size in bytes of logout area */
  59         unsigned int    sbz1    : 30;   /* should be zero */
  60         unsigned int    err2    :  1;   /* second error */
  61         unsigned int    retry   :  1;   /* retry flag */
  62         unsigned int    proc_offset;    /* processor-specific offset */
  63         unsigned int    sys_offset;     /* system-specific offset */
  64         unsigned int    code;           /* machine check code */
  65         unsigned int    frame_rev;      /* frame revision */
  66 };
  67
  68 /* Machine Check Frame for uncorrectable errors (Large format)
  69  *      --- This is used to log uncorrectable errors such as
  70  *          double bit ECC errors.
  71  *      --- These errors are detected by both processor and systems.
  72  */
  73 struct el_common_EV5_uncorrectable_mcheck {
  74         unsigned long   shadow[8];        /* Shadow reg. 8-14, 25           */
  75         unsigned long   paltemp[24];      /* PAL TEMP REGS.                 */
  76         unsigned long   exc_addr;         /* Address of excepting instruction*/
  77         unsigned long   exc_sum;          /* Summary of arithmetic traps.   */
  78         unsigned long   exc_mask;         /* Exception mask (from exc_sum). */
  79         unsigned long   pal_base;         /* Base address for PALcode.      */
  80         unsigned long   isr;              /* Interrupt Status Reg.          */
  81         unsigned long   icsr;             /* CURRENT SETUP OF EV5 IBOX      */
  82         unsigned long   ic_perr_stat;     /* I-CACHE Reg. <11> set Data parity
  83                                                          <12> set TAG parity*/
  84         unsigned long   dc_perr_stat;     /* D-CACHE error Reg. Bits set to 1:
  85                                                      <2> Data error in bank 0
  86                                                      <3> Data error in bank 1
  87                                                      <4> Tag error in bank 0
  88                                                      <5> Tag error in bank 1 */
  89         unsigned long   va;               /* Effective VA of fault or miss. */
  90         unsigned long   mm_stat;          /* Holds the reason for D-stream
  91                                              fault or D-cache parity errors */
  92         unsigned long   sc_addr;          /* Address that was being accessed
  93                                              when EV5 detected Secondary cache
  94                                              failure.                 */
  95         unsigned long   sc_stat;          /* Helps determine if the error was
  96                                              TAG/Data parity(Secondary Cache)*/
  97         unsigned long   bc_tag_addr;      /* Contents of EV5 BC_TAG_ADDR    */
  98         unsigned long   ei_addr;          /* Physical address of any transfer
  99                                              that is logged in EV5 EI_STAT */
 100         unsigned long   fill_syndrome;    /* For correcting ECC errors.     */
 101         unsigned long   ei_stat;          /* Helps identify reason of any
 102                                              processor uncorrectable error
 103                                              at its external interface.     */
 104         unsigned long   ld_lock;          /* Contents of EV5 LD_LOCK register*/
 105 };
 106
 107 struct el_common_EV6_mcheck {
 108         unsigned int FrameSize;         /* Bytes, including this field */
 109         unsigned int FrameFlags;        /* <31> = Retry, <30> = Second Error */
 110         unsigned int CpuOffset;         /* Offset to CPU-specific info */
 111         unsigned int SystemOffset;      /* Offset to system-specific info */
 112         unsigned int MCHK_Code;
 113         unsigned int MCHK_Frame_Rev;
 114         unsigned long I_STAT;           /* EV6 Internal Processor Registers */
 115         unsigned long DC_STAT;          /* (See the 21264 Spec) */
 116         unsigned long C_ADDR;
 117         unsigned long DC1_SYNDROME;
 118         unsigned long DC0_SYNDROME;
 119         unsigned long C_STAT;
 120         unsigned long C_STS;
 121         unsigned long MM_STAT;
 122         unsigned long EXC_ADDR;
 123         unsigned long IER_CM;
 124         unsigned long ISUM;
 125         unsigned long RESERVED0;
 126         unsigned long PAL_BASE;
 127         unsigned long I_CTL;
 128         unsigned long PCTX;
 129 };
 130
 131 extern void halt(void) __attribute__((noreturn));
 132 #define __halt() __asm__ __volatile__ ("call_pal %0 #halt" : : "i" (PAL_halt))
 133
 134 #define switch_to(P,N,L)                                                 \
 135   do {                                                                   \
 136     (L) = alpha_switch_to(virt_to_phys(&task_thread_info(N)->pcb), (P)); \
 137     check_mmu_context();                                                 \
 138   } while (0)
 139
 140 struct task_struct;
 141 extern struct task_struct *alpha_switch_to(unsigned long, struct task_struct*);
 142
 143 #define imb() \
 144 __asm__ __volatile__ ("call_pal %0 #imb" : : "i" (PAL_imb) : "memory")
 145
 146 #define draina() \
 147 __asm__ __volatile__ ("call_pal %0 #draina" : : "i" (PAL_draina) : "memory")
 148
 149 enum implver_enum {
 150         IMPLVER_EV4,
 151         IMPLVER_EV5,
 152         IMPLVER_EV6
 153 };
 154
 155 #ifdef CONFIG_ALPHA_GENERIC
 156 #define implver()                               \
 157 ({ unsigned long __implver;                     \
 158    __asm__ ("implver %0" : "=r"(__implver));    \
 159    (enum implver_enum) __implver; })
 160 #else
 161 /* Try to eliminate some dead code.  */
 162 #ifdef CONFIG_ALPHA_EV4
 163 #define implver() IMPLVER_EV4
 164 #endif
 165 #ifdef CONFIG_ALPHA_EV5
 166 #define implver() IMPLVER_EV5
 167 #endif
 168 #if defined(CONFIG_ALPHA_EV6)
 169 #define implver() IMPLVER_EV6
 170 #endif
 171 #endif
 172
 173 enum amask_enum {
 174         AMASK_BWX = (1UL << 0),
 175         AMASK_FIX = (1UL << 1),
 176         AMASK_CIX = (1UL << 2),
 177         AMASK_MAX = (1UL << 8),
 178         AMASK_PRECISE_TRAP = (1UL << 9),
 179 };
 180
 181 #define amask(mask)                                             \
 182 ({ unsigned long __amask, __input = (mask);                     \
 183    __asm__ ("amask %1,%0" : "=r"(__amask) : "rI"(__input));     \
 184    __amask; })
 185
 186 #define __CALL_PAL_R0(NAME, TYPE)                               \
 187 extern inline TYPE NAME(void)                                   \
 188 {                                                               \
 189         register TYPE __r0 __asm__("$0");                       \
 190         __asm__ __volatile__(                                   \
 191                 "call_pal %1 # " #NAME                          \
 192                 :"=r" (__r0)                                    \
 193                 :"i" (PAL_ ## NAME)                             \
 194                 :"$1", "$16", "$22", "$23", "$24", "$25");      \
 195         return __r0;                                            \
 196 }
 197
 198 #define __CALL_PAL_W1(NAME, TYPE0)                              \
 199 extern inline void NAME(TYPE0 arg0)                             \
 200 {                                                               \
 201         register TYPE0 __r16 __asm__("$16") = arg0;             \
 202         __asm__ __volatile__(                                   \
 203                 "call_pal %1 # "#NAME                           \
 204                 : "=r"(__r16)                                   \
 205                 : "i"(PAL_ ## NAME), "0"(__r16)                 \
 206                 : "$1", "$22", "$23", "$24", "$25");            \
 207 }
 208
 209 #define __CALL_PAL_W2(NAME, TYPE0, TYPE1)                       \
 210 extern inline void NAME(TYPE0 arg0, TYPE1 arg1)                 \
 211 {                                                               \
 212         register TYPE0 __r16 __asm__("$16") = arg0;             \
 213         register TYPE1 __r17 __asm__("$17") = arg1;             \
 214         __asm__ __volatile__(                                   \
 215                 "call_pal %2 # "#NAME                           \
 216                 : "=r"(__r16), "=r"(__r17)                      \
 217                 : "i"(PAL_ ## NAME), "0"(__r16), "1"(__r17)     \
 218                 : "$1", "$22", "$23", "$24", "$25");            \
 219 }
 220
 221 #define __CALL_PAL_RW1(NAME, RTYPE, TYPE0)                      \
 222 extern inline RTYPE NAME(TYPE0 arg0)                            \
 223 {                                                               \
 224         register RTYPE __r0 __asm__("$0");                      \
 225         register TYPE0 __r16 __asm__("$16") = arg0;             \
 226         __asm__ __volatile__(                                   \
 227                 "call_pal %2 # "#NAME                           \
 228                 : "=r"(__r16), "=r"(__r0)                       \
 229                 : "i"(PAL_ ## NAME), "0"(__r16)                 \
 230                 : "$1", "$22", "$23", "$24", "$25");            \
 231         return __r0;                                            \
 232 }
 233
 234 #define __CALL_PAL_RW2(NAME, RTYPE, TYPE0, TYPE1)               \
 235 extern inline RTYPE NAME(TYPE0 arg0, TYPE1 arg1)                \
 236 {                                                               \
 237         register RTYPE __r0 __asm__("$0");                      \
 238         register TYPE0 __r16 __asm__("$16") = arg0;             \
 239         register TYPE1 __r17 __asm__("$17") = arg1;             \
 240         __asm__ __volatile__(                                   \
 241                 "call_pal %3 # "#NAME                           \
 242                 : "=r"(__r16), "=r"(__r17), "=r"(__r0)          \
 243                 : "i"(PAL_ ## NAME), "0"(__r16), "1"(__r17)     \
 244                 : "$1", "$22", "$23", "$24", "$25");            \
 245         return __r0;                                            \
 246 }
 247
 248 __CALL_PAL_W1(cflush, unsigned long);
 249 __CALL_PAL_R0(rdmces, unsigned long);
 250 __CALL_PAL_R0(rdps, unsigned long);
 251 __CALL_PAL_R0(rdusp, unsigned long);
 252 __CALL_PAL_RW1(swpipl, unsigned long, unsigned long);
 253 __CALL_PAL_R0(whami, unsigned long);
 254 __CALL_PAL_W2(wrent, void*, unsigned long);
 255 __CALL_PAL_W1(wripir, unsigned long);
 256 __CALL_PAL_W1(wrkgp, unsigned long);
 257 __CALL_PAL_W1(wrmces, unsigned long);
 258 __CALL_PAL_RW2(wrperfmon, unsigned long, unsigned long, unsigned long);
 259 __CALL_PAL_W1(wrusp, unsigned long);
 260 __CALL_PAL_W1(wrvptptr, unsigned long);
 261
 262 #define IPL_MIN         0
 263 #define IPL_SW0         1
 264 #define IPL_SW1         2
 265 #define IPL_DEV0        3
 266 #define IPL_DEV1        4
 267 #define IPL_TIMER       5
 268 #define IPL_PERF        6
 269 #define IPL_POWERFAIL   6
 270 #define IPL_MCHECK      7
 271 #define IPL_MAX         7
 272
 273 #ifdef CONFIG_ALPHA_BROKEN_IRQ_MASK
 274 #undef IPL_MIN
 275 #define IPL_MIN         __min_ipl
 276 extern int __min_ipl;
 277 #endif
 278
 279 #define getipl()                (rdps() & 7)
 280 #define setipl(ipl)             ((void) swpipl(ipl))
 281
 282 #define local_irq_disable()                     do { setipl(IPL_MAX); barrier(); } while(0)
 283 #define local_irq_enable()                      do { barrier(); setipl(IPL_MIN); } while(0)
 284 #define local_save_flags(flags) ((flags) = rdps())
 285 #define local_irq_save(flags)   do { (flags) = swpipl(IPL_MAX); barrier(); } while(0)
 286 #define local_irq_restore(flags)        do { barrier(); setipl(flags); barrier(); } while(0)
 287
 288 #define irqs_disabled() (getipl() == IPL_MAX)
 289
 290 /*
 291  * TB routines..
 292  */
 293 #define __tbi(nr,arg,arg1...)                                   \
 294 ({                                                              \
 295         register unsigned long __r16 __asm__("$16") = (nr);     \
 296         register unsigned long __r17 __asm__("$17"); arg;       \
 297         __asm__ __volatile__(                                   \
 298                 "call_pal %3 #__tbi"                            \
 299                 :"=r" (__r16),"=r" (__r17)                      \
 300                 :"0" (__r16),"i" (PAL_tbi) ,##arg1              \
 301                 :"$0", "$1", "$22", "$23", "$24", "$25");       \
 302 })
 303
 304 #define tbi(x,y)        __tbi(x,__r17=(y),"1" (__r17))
 305 #define tbisi(x)        __tbi(1,__r17=(x),"1" (__r17))
 306 #define tbisd(x)        __tbi(2,__r17=(x),"1" (__r17))
 307 #define tbis(x)         __tbi(3,__r17=(x),"1" (__r17))
 308 #define tbiap()         __tbi(-1, /* no second argument */)
 309 #define tbia()          __tbi(-2, /* no second argument */)
 310
 311 /*
 312  * Atomic exchange routines.
 313  */
 314
 315 #define __ASM__MB
 316 #define ____xchg(type, args...)         __xchg ## type ## _local(args)
 317 #define ____cmpxchg(type, args...)      __cmpxchg ## type ## _local(args)
 318 #include <asm/xchg.h>
 319
 320 #define xchg_local(ptr,x)                                               \
 321   ({                                                                    \
 322      __typeof__(*(ptr)) _x_ = (x);                                      \
 323      (__typeof__(*(ptr))) __xchg_local((ptr), (unsigned long)_x_,       \
 324                                        sizeof(*(ptr)));                 \
 325   })
 326
 327 #define cmpxchg_local(ptr, o, n)                                        \
 328   ({                                                                    \
 329      __typeof__(*(ptr)) _o_ = (o);                                      \
 330      __typeof__(*(ptr)) _n_ = (n);                                      \
 331      (__typeof__(*(ptr))) __cmpxchg_local((ptr), (unsigned long)_o_,    \
 332                                           (unsigned long)_n_,           \
 333                                           sizeof(*(ptr)));              \
 334   })
 335
 336 #define cmpxchg64_local(ptr, o, n)                                      \
 337   ({                                                                    \
 338         BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
 339         cmpxchg_local((ptr), (o), (n));                                 \
 340   })
 341
 342 #ifdef CONFIG_SMP
 343 #undef __ASM__MB
 344 #define __ASM__MB       "\tmb\n"
 345 #endif
 346 #undef ____xchg
 347 #undef ____cmpxchg
 348 #define ____xchg(type, args...)         __xchg ##type(args)
 349 #define ____cmpxchg(type, args...)      __cmpxchg ##type(args)
 350 #include <asm/xchg.h>
 351
 352 #define xchg(ptr,x)                                                     \
 353   ({                                                                    \
 354      __typeof__(*(ptr)) _x_ = (x);                                      \
 355      (__typeof__(*(ptr))) __xchg((ptr), (unsigned long)_x_,             \
 356                                  sizeof(*(ptr)));                       \
 357   })
 358
 359 #define cmpxchg(ptr, o, n)                                              \
 360   ({                                                                    \
 361      __typeof__(*(ptr)) _o_ = (o);                                      \
 362      __typeof__(*(ptr)) _n_ = (n);                                      \
 363      (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_,          \
 364                                     (unsigned long)_n_, sizeof(*(ptr)));\
 365   })
 366
 367 #define cmpxchg64(ptr, o, n)                                            \
 368   ({                                                                    \
 369         BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
 370         cmpxchg((ptr), (o), (n));                                       \
 371   })
 372
 373 #undef __ASM__MB
 374 #undef ____cmpxchg
 375
 376 #define __HAVE_ARCH_CMPXCHG 1
 377
 378 #endif /* __ASSEMBLY__ */
 379
 380 #define arch_align_stack(x) (x)
 381
 382 #endif