include/asm-ia64/asmmacro.h

   1 #ifndef _ASM_IA64_ASMMACRO_H
   2 #define _ASM_IA64_ASMMACRO_H
   3
   4 /*
   5  * Copyright (C) 2000-2001, 2003-2004 Hewlett-Packard Co
   6  *      David Mosberger-Tang <davidm@hpl.hp.com>
   7  */
   8
   9 #include <linux/config.h>
  10
  11 #define ENTRY(name)                             \
  12         .align 32;                              \
  13         .proc name;                             \
  14 name:
  15
  16 #define ENTRY_MIN_ALIGN(name)                   \
  17         .align 16;                              \
  18         .proc name;                             \
  19 name:
  20
  21 #define GLOBAL_ENTRY(name)                      \
  22         .global name;                           \
  23         ENTRY(name)
  24
  25 #define END(name)                               \
  26         .endp name
  27
  28 /*
  29  * Helper macros to make unwind directives more readable:
  30  */
  31
  32 /* prologue_gr: */
  33 #define ASM_UNW_PRLG_RP                 0x8
  34 #define ASM_UNW_PRLG_PFS                0x4
  35 #define ASM_UNW_PRLG_PSP                0x2
  36 #define ASM_UNW_PRLG_PR                 0x1
  37 #define ASM_UNW_PRLG_GRSAVE(ninputs)    (32+(ninputs))
  38
  39 /*
  40  * Helper macros for accessing user memory.
  41  */
  42
  43         .section "__ex_table", "a"              // declare section & section attributes
  44         .previous
  45
  46 # define EX(y,x...)                             \
  47         .xdata4 "__ex_table", 99f-., y-.;       \
  48   [99:] x
  49 # define EXCLR(y,x...)                          \
  50         .xdata4 "__ex_table", 99f-., y-.+4;     \
  51   [99:] x
  52
  53 /*
  54  * Tag MCA recoverable instruction ranges.
  55  */
  56
  57         .section "__mca_table", "a"             // declare section & section attributes
  58         .previous
  59
  60 # define MCA_RECOVER_RANGE(y)                   \
  61         .xdata4 "__mca_table", y-., 99f-.;      \
  62   [99:]
  63
  64 /*
  65  * Mark instructions that need a load of a virtual address patched to be
  66  * a load of a physical address.  We use this either in critical performance
  67  * path (ivt.S - TLB miss processing) or in places where it might not be
  68  * safe to use a "tpa" instruction (mca_asm.S - error recovery).
  69  */
  70         .section ".data.patch.vtop", "a"        // declare section & section attributes
  71         .previous
  72
  73 #define LOAD_PHYSICAL(pr, reg, obj)             \
  74 [1:](pr)movl reg = obj;                         \
  75         .xdata4 ".data.patch.vtop", 1b-.
  76
  77 /*
  78  * For now, we always put in the McKinley E9 workaround.  On CPUs that don't need it,
  79  * we'll patch out the work-around bundles with NOPs, so their impact is minimal.
  80  */
  81 #define DO_MCKINLEY_E9_WORKAROUND
  82
  83 #ifdef DO_MCKINLEY_E9_WORKAROUND
  84         .section ".data.patch.mckinley_e9", "a"
  85         .previous
  86 /* workaround for Itanium 2 Errata 9: */
  87 # define FSYS_RETURN                                    \
  88         .xdata4 ".data.patch.mckinley_e9", 1f-.;        \
  89 1:{ .mib;                                               \
  90         nop.m 0;                                        \
  91         mov r16=ar.pfs;                                 \
  92         br.call.sptk.many b7=2f;;                       \
  93   };                                                    \
  94 2:{ .mib;                                               \
  95         nop.m 0;                                        \
  96         mov ar.pfs=r16;                                 \
  97         br.ret.sptk.many b6;;                           \
  98   }
  99 #else
 100 # define FSYS_RETURN    br.ret.sptk.many b6
 101 #endif
 102
 103 /*
 104  * Up until early 2004, use of .align within a function caused bad unwind info.
 105  * TEXT_ALIGN(n) expands into ".align n" if a fixed GAS is available or into nothing
 106  * otherwise.
 107  */
 108 #ifdef HAVE_WORKING_TEXT_ALIGN
 109 # define TEXT_ALIGN(n)  .align n
 110 #else
 111 # define TEXT_ALIGN(n)
 112 #endif
 113
 114 #ifdef HAVE_SERIALIZE_DIRECTIVE
 115 # define dv_serialize_data              .serialize.data
 116 # define dv_serialize_instruction       .serialize.instruction
 117 #else
 118 # define dv_serialize_data
 119 # define dv_serialize_instruction
 120 #endif
 121
 122 #endif /* _ASM_IA64_ASMMACRO_H */