include/asm-alpha/system.h

/* */
This source file includes following definitions.
xchg_u32
xchg_u64
xchg_ptr
   1 #ifndef __ALPHA_SYSTEM_H
   2 #define __ALPHA_SYSTEM_H
   3 
   4 /*
   5  * System defines.. Note that this is included both from .c and .S
   6  * files, so it does only defines, not any C code.
   7  */
   8 
   9 /*
  10  * We leave one page for the initial stack page, and one page for
  11  * the initial process structure. Also, the console eats 3 MB for
  12  * the initial bootloader (one of which we can reclaim later).
  13  * With a few other pages for various reasons, we'll use an initial
  14  * load address of 0xfffffc0000310000UL
  15  */
  16 #define BOOT_PCB        0x20000000
  17 #define BOOT_ADDR       0x20000000
  18 #define BOOT_SIZE       (16*1024)
  19 
  20 #define KERNEL_START    0xfffffc0000300000
  21 #define SWAPPER_PGD     0xfffffc0000300000
  22 #define INIT_STACK      0xfffffc0000302000
  23 #define EMPTY_PGT       0xfffffc0000304000
  24 #define EMPTY_PGE       0xfffffc0000308000
  25 #define ZERO_PGE        0xfffffc000030A000
  26 
  27 #define START_ADDR      0xfffffc0000310000
  28 #define START_SIZE      (2*1024*1024)
  29 
  30 /*
  31  * Common PAL-code
  32  */
  33 #define PAL_halt          0
  34 #define PAL_cflush        1
  35 #define PAL_draina        2
  36 #define PAL_cobratt       9
  37 #define PAL_bpt         128
  38 #define PAL_bugchk      129
  39 #define PAL_chmk        131
  40 #define PAL_callsys     131
  41 #define PAL_imb         134
  42 #define PAL_rduniq      158
  43 #define PAL_wruniq      159
  44 #define PAL_gentrap     170
  45 #define PAL_nphalt      190
  46 
  47 /*
  48  * VMS specific PAL-code
  49  */
  50 #define PAL_swppal      10
  51 #define PAL_mfpr_vptb   41
  52 
  53 /*
  54  * OSF specific PAL-code
  55  */
  56 #define PAL_rdmces      16
  57 #define PAL_wrmces      17
  58 #define PAL_wrfen       43
  59 #define PAL_wrvptptr    45
  60 #define PAL_jtopal      46
  61 #define PAL_swpctx      48
  62 #define PAL_wrval       49
  63 #define PAL_rdval       50
  64 #define PAL_tbi         51
  65 #define PAL_wrent       52
  66 #define PAL_swpipl      53
  67 #define PAL_rdps        54
  68 #define PAL_wrkgp       55
  69 #define PAL_wrusp       56
  70 #define PAL_wrperfmon   57
  71 #define PAL_rdusp       58
  72 #define PAL_whami       60
  73 #define PAL_rtsys       61
  74 #define PAL_rti         63
  75 
  76 #ifndef __ASSEMBLY__
  77 
  78 extern void wrent(void *, unsigned long);
  79 extern void wrkgp(unsigned long);
  80 extern void wrusp(unsigned long);
  81 extern unsigned long rdusp(void);
  82 
  83 #define halt() __asm__ __volatile__(".long 0");
  84 
  85 extern void alpha_switch_to(unsigned long pctxp);
  86 
  87 #define switch_to(p) do { \
  88         current = p; \
  89         alpha_switch_to((unsigned long) &(p)->tss - 0xfffffc0000000000); \
  90 } while (0)
  91 
  92 #define mb() \
  93 __asm__ __volatile__("mb": : :"memory")
  94 
  95 #define draina() \
  96 __asm__ __volatile__ ("call_pal %0" : : "i" (PAL_draina) : "memory")
  97 
  98 #define getipl() \
  99 ({ unsigned long __old_ipl; \
 100 __asm__ __volatile__( \
 101         "call_pal 54\n\t" \
 102         "bis $0,$0,%0" \
 103         : "=r" (__old_ipl) \
 104         : : "$0", "$1", "$16", "$22", "$23", "$24", "$25"); \
 105 __old_ipl; })
 106 
 107 #define setipl(__new_ipl) \
 108 __asm__ __volatile__( \
 109         "bis %0,%0,$16\n\t" \
 110         "call_pal 53" \
 111         : : "r" (__new_ipl) \
 112         : "$0", "$1", "$16", "$22", "$23", "$24", "$25")
 113 
 114 #define swpipl(__new_ipl) \
 115 ({ unsigned long __old_ipl; \
 116 __asm__ __volatile__( \
 117         "bis %1,%1,$16\n\t" \
 118         "call_pal 53\n\t" \
 119         "bis $0,$0,%0" \
 120         : "=r" (__old_ipl) \
 121         : "r" (__new_ipl) \
 122         : "$0", "$1", "$16", "$22", "$23", "$24", "$25"); \
 123 __old_ipl; })
 124 
 125 #define cli()                   setipl(7)
 126 #define sti()                   setipl(0)
 127 #define save_flags(flags)       do { flags = getipl(); } while (0)
 128 #define restore_flags(flags)    setipl(flags)
 129 
 130 extern inline unsigned long xchg_u32(int * m, unsigned long val)
     /*  */
 131 {
 132         unsigned long dummy, dummy2;
 133 
 134         __asm__ __volatile__(
 135                 "\n1:\t"
 136                 "ldl_l %0,%1\n\t"
 137                 "bis %2,%2,%3\n\t"
 138                 "stl_c %3,%1\n\t"
 139                 "beq %3,1b\n"
 140                 : "=r" (val), "=m" (*m), "=r" (dummy), "=r" (dummy2)
 141                 : "1" (*m), "2" (val));
 142         return val;
 143 }
 144 
 145 extern inline unsigned long xchg_u64(long * m, unsigned long val)
     /*  */
 146 {
 147         unsigned long dummy, dummy2;
 148 
 149         __asm__ __volatile__(
 150                 "\n1:\t"
 151                 "ldq_l %0,%1\n\t"
 152                 "bis %2,%2,%3\n\t"
 153                 "stq_c %3,%1\n\t"
 154                 "beq %3,1b\n"
 155                 : "=r" (val), "=m" (*m), "=r" (dummy), "=r" (dummy2)
 156                 : "1" (*m), "2" (val));
 157         return val;
 158 }
 159 
 160 extern inline void * xchg_ptr(void *m, void *val)
     /*  */
 161 {
 162         return (void *) xchg_u64((long *) m, (unsigned long) val);
 163 }
 164 
 165 #endif /* __ASSEMBLY__ */
 166 
 167 #endif
/* */
root/include/asm-alpha/system.h

INCLUDED FROM

DEFINITIONS
