libc/sysdeps/linux/powerpc/sysdep.h

   1 /* Copyright (C) 1999, 2001, 2002, 2006 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <common/sysdep.h>
  19 #include <sys/syscall.h>
  20
  21 /*
  22  * Powerpc Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
  23  * This entry is copied to _dl_hwcap or rtld_global._dl_hwcap during startup.
  24  * The following must match the kernels linux/asm/cputable.h.
  25  */
  26 #define PPC_FEATURE_32                  0x80000000 /* 32-bit mode. */
  27 #define PPC_FEATURE_64                  0x40000000 /* 64-bit mode. */
  28 #define PPC_FEATURE_601_INSTR           0x20000000 /* 601 chip, Old POWER ISA.  */
  29 #define PPC_FEATURE_HAS_ALTIVEC         0x10000000 /* SIMD/Vector Unit.  */
  30 #define PPC_FEATURE_HAS_FPU             0x08000000 /* Floating Point Unit.  */
  31 #define PPC_FEATURE_HAS_MMU             0x04000000 /* Memory Management Unit.  */
  32 #define PPC_FEATURE_HAS_4xxMAC          0x02000000 /* 4xx Multiply Accumulator.  */
  33 #define PPC_FEATURE_UNIFIED_CACHE       0x01000000 /* Unified I/D cache.  */
  34 #define PPC_FEATURE_HAS_SPE             0x00800000 /* Signal Processing ext.  */
  35 #define PPC_FEATURE_HAS_EFP_SINGLE      0x00400000 /* SPE Float.  */
  36 #define PPC_FEATURE_HAS_EFP_DOUBLE      0x00200000 /* SPE Double.  */
  37 #define PPC_FEATURE_NO_TB               0x00100000 /* 601/403gx have no timebase */
  38 #define PPC_FEATURE_POWER4              0x00080000 /* POWER4 ISA 2.00 */
  39 #define PPC_FEATURE_POWER5              0x00040000 /* POWER5 ISA 2.02 */
  40 #define PPC_FEATURE_POWER5_PLUS         0x00020000 /* POWER5+ ISA 2.03 */
  41 #define PPC_FEATURE_CELL_BE             0x00010000 /* CELL Broadband Engine */
  42 #define PPC_FEATURE_BOOKE               0x00008000
  43 #define PPC_FEATURE_SMT                 0x00004000 /* Simultaneous Multi-Threading */
  44 #define PPC_FEATURE_ICACHE_SNOOP        0x00002000
  45 #define PPC_FEATURE_ARCH_2_05           0x00001000 /* ISA 2.05 */
  46 #define PPC_FEATURE_PA6T                0x00000800 /* PA Semi 6T Core */
  47 #define PPC_FEATURE_HAS_DFP             0x00000400 /* Decimal FP Unit */
  48 #define PPC_FEATURE_POWER6_EXT          0x00000200 /* P6 + mffgpr/mftgpr */
  49 #define PPC_FEATURE_ARCH_2_06           0x00000100 /* ISA 2.06 */
  50 #define PPC_FEATURE_HAS_VSX             0x00000080 /* P7 Vector Extension.  */
  51 #define PPC_FEATURE_970 (PPC_FEATURE_POWER4 + PPC_FEATURE_HAS_ALTIVEC)
  52
  53 #ifdef __ASSEMBLER__
  54
  55 /* Symbolic names for the registers.  The only portable way to write asm
  56    code is to use number but this produces really unreadable code.
  57    Therefore these symbolic names.  */
  58
  59 /* Integer registers.  */
  60 #define r0      0
  61 #define r1      1
  62 #define r2      2
  63 #define r3      3
  64 #define r4      4
  65 #define r5      5
  66 #define r6      6
  67 #define r7      7
  68 #define r8      8
  69 #define r9      9
  70 #define r10     10
  71 #define r11     11
  72 #define r12     12
  73 #define r13     13
  74 #define r14     14
  75 #define r15     15
  76 #define r16     16
  77 #define r17     17
  78 #define r18     18
  79 #define r19     19
  80 #define r20     20
  81 #define r21     21
  82 #define r22     22
  83 #define r23     23
  84 #define r24     24
  85 #define r25     25
  86 #define r26     26
  87 #define r27     27
  88 #define r28     28
  89 #define r29     29
  90 #define r30     30
  91 #define r31     31
  92
  93 /* Floating-point registers.  */
  94 #define fp0     0
  95 #define fp1     1
  96 #define fp2     2
  97 #define fp3     3
  98 #define fp4     4
  99 #define fp5     5
 100 #define fp6     6
 101 #define fp7     7
 102 #define fp8     8
 103 #define fp9     9
 104 #define fp10    10
 105 #define fp11    11
 106 #define fp12    12
 107 #define fp13    13
 108 #define fp14    14
 109 #define fp15    15
 110 #define fp16    16
 111 #define fp17    17
 112 #define fp18    18
 113 #define fp19    19
 114 #define fp20    20
 115 #define fp21    21
 116 #define fp22    22
 117 #define fp23    23
 118 #define fp24    24
 119 #define fp25    25
 120 #define fp26    26
 121 #define fp27    27
 122 #define fp28    28
 123 #define fp29    29
 124 #define fp30    30
 125 #define fp31    31
 126
 127 /* Condition code registers.  */
 128 #define cr0     0
 129 #define cr1     1
 130 #define cr2     2
 131 #define cr3     3
 132 #define cr4     4
 133 #define cr5     5
 134 #define cr6     6
 135 #define cr7     7
 136
 137 /* Vector registers. */
 138 #define v0      0
 139 #define v1      1
 140 #define v2      2
 141 #define v3      3
 142 #define v4      4
 143 #define v5      5
 144 #define v6      6
 145 #define v7      7
 146 #define v8      8
 147 #define v9      9
 148 #define v10     10
 149 #define v11     11
 150 #define v12     12
 151 #define v13     13
 152 #define v14     14
 153 #define v15     15
 154 #define v16     16
 155 #define v17     17
 156 #define v18     18
 157 #define v19     19
 158 #define v20     20
 159 #define v21     21
 160 #define v22     22
 161 #define v23     23
 162 #define v24     24
 163 #define v25     25
 164 #define v26     26
 165 #define v27     27
 166 #define v28     28
 167 #define v29     29
 168 #define v30     30
 169 #define v31     31
 170
 171 #define VRSAVE  256
 172
 173 /* This seems to always be the case on PPC.  */
 174 #define ALIGNARG(log2) log2
 175 /* For ELF we need the `.type' directive to make shared libs work right.  */
 176 #define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
 177 #define ASM_SIZE_DIRECTIVE(name) .size name,.-name
 178
 179 /* In ELF C symbols are asm symbols.  */
 180 #undef  NO_UNDERSCORES
 181 #define NO_UNDERSCORES
 182
 183 #define ENTRY(name)                                                           \
 184   .globl C_SYMBOL_NAME(name);                                 \
 185   ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function)                          \
 186   .align ALIGNARG(2);                                                         \
 187   C_LABEL(name)                                                               \
 188   cfi_startproc;                                                              \
 189
 190 #define EALIGN_W_0  /* No words to insert.  */
 191 #define EALIGN_W_1  nop
 192 #define EALIGN_W_2  nop;nop
 193 #define EALIGN_W_3  nop;nop;nop
 194 #define EALIGN_W_4  EALIGN_W_3;nop
 195 #define EALIGN_W_5  EALIGN_W_4;nop
 196 #define EALIGN_W_6  EALIGN_W_5;nop
 197 #define EALIGN_W_7  EALIGN_W_6;nop
 198
 199 #define EALIGN(name, alignt, words)                                           \
 200   .globl C_SYMBOL_NAME(name);                                 \
 201   ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function)                          \
 202   .align ALIGNARG(alignt);                                                    \
 203   EALIGN_W_##words;                                                           \
 204   C_LABEL(name)                                                               \
 205   cfi_startproc;
 206
 207 #undef  END
 208 #define END(name)                                                             \
 209   cfi_endproc;                                                                \
 210   ASM_SIZE_DIRECTIVE(name)
 211
 212 #define DO_CALL(syscall)                                                      \
 213     li 0,syscall;                                                             \
 214     sc
 215
 216 #undef JUMPTARGET
 217 #ifdef PIC
 218 # define JUMPTARGET(name) name##@plt
 219 #else
 220 # define JUMPTARGET(name) name
 221 #endif
 222
 223 #if defined SHARED && defined DO_VERSIONING && defined PIC \
 224     && !defined NO_HIDDEN
 225 # undef HIDDEN_JUMPTARGET
 226 # define HIDDEN_JUMPTARGET(name) __GI_##name##@local
 227 #endif
 228
 229 #define PSEUDO(name, syscall_name, args)                                      \
 230   .section ".text";                                                           \
 231   ENTRY (name)                                                                \
 232     DO_CALL (SYS_ify (syscall_name));
 233
 234 #define PSEUDO_RET                                                            \
 235     bnslr+;                                                                   \
 236     b __syscall_error@local
 237 #define ret PSEUDO_RET
 238
 239 #undef  PSEUDO_END
 240 #define PSEUDO_END(name)                                                      \
 241   END (name)
 242
 243 #define PSEUDO_NOERRNO(name, syscall_name, args)                              \
 244   .section ".text";                                                           \
 245   ENTRY (name)                                                                \
 246     DO_CALL (SYS_ify (syscall_name));
 247
 248 #define PSEUDO_RET_NOERRNO                                                    \
 249     blr
 250 #define ret_NOERRNO PSEUDO_RET_NOERRNO
 251
 252 #undef  PSEUDO_END_NOERRNO
 253 #define PSEUDO_END_NOERRNO(name)                                              \
 254   END (name)
 255
 256 #define PSEUDO_ERRVAL(name, syscall_name, args)                               \
 257   .section ".text";                                                           \
 258   ENTRY (name)                                                                \
 259     DO_CALL (SYS_ify (syscall_name));
 260
 261 #undef  PSEUDO_END_ERRVAL
 262 #define PSEUDO_END_ERRVAL(name)                                               \
 263   END (name)
 264
 265 /* Local labels stripped out by the linker.  */
 266 #undef L
 267 #define L(x) .L##x
 268
 269 /* Label in text section.  */
 270 #define C_TEXT(name) name
 271
 272 #endif  /* __ASSEMBLER__ */