include/asm-sparc/winmacro.h

   1 /* $Id: winmacro.h,v 1.22 2000/05/09 17:40:15 davem Exp $
   2  * winmacro.h: Window loading-unloading macros.
   3  *
   4  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   5  */
   6
   7 #ifndef _SPARC_WINMACRO_H
   8 #define _SPARC_WINMACRO_H
   9
  10 #include <linux/config.h>
  11 #include <asm/ptrace.h>
  12 #include <asm/psr.h>
  13
  14 /* These are just handy. */
  15 #define _SV     save    %sp, -REGWIN_SZ, %sp
  16 #define _RS     restore
  17
  18 #define FLUSH_ALL_KERNEL_WINDOWS \
  19         _SV; _SV; _SV; _SV; _SV; _SV; _SV; \
  20         _RS; _RS; _RS; _RS; _RS; _RS; _RS;
  21
  22 /* Store the register window onto the 8-byte aligned area starting
  23  * at %reg.  It might be %sp, it might not, we don't care.
  24  */
  25 #define STORE_WINDOW(reg) \
  26         std     %l0, [%reg + RW_L0]; \
  27         std     %l2, [%reg + RW_L2]; \
  28         std     %l4, [%reg + RW_L4]; \
  29         std     %l6, [%reg + RW_L6]; \
  30         std     %i0, [%reg + RW_I0]; \
  31         std     %i2, [%reg + RW_I2]; \
  32         std     %i4, [%reg + RW_I4]; \
  33         std     %i6, [%reg + RW_I6];
  34
  35 /* Load a register window from the area beginning at %reg. */
  36 #define LOAD_WINDOW(reg) \
  37         ldd     [%reg + RW_L0], %l0; \
  38         ldd     [%reg + RW_L2], %l2; \
  39         ldd     [%reg + RW_L4], %l4; \
  40         ldd     [%reg + RW_L6], %l6; \
  41         ldd     [%reg + RW_I0], %i0; \
  42         ldd     [%reg + RW_I2], %i2; \
  43         ldd     [%reg + RW_I4], %i4; \
  44         ldd     [%reg + RW_I6], %i6;
  45
  46 /* Loading and storing struct pt_reg trap frames. */
  47 #define LOAD_PT_INS(base_reg) \
  48         ldd     [%base_reg + REGWIN_SZ + PT_I0], %i0; \
  49         ldd     [%base_reg + REGWIN_SZ + PT_I2], %i2; \
  50         ldd     [%base_reg + REGWIN_SZ + PT_I4], %i4; \
  51         ldd     [%base_reg + REGWIN_SZ + PT_I6], %i6;
  52
  53 #define LOAD_PT_GLOBALS(base_reg) \
  54         ld      [%base_reg + REGWIN_SZ + PT_G1], %g1; \
  55         ldd     [%base_reg + REGWIN_SZ + PT_G2], %g2; \
  56         ldd     [%base_reg + REGWIN_SZ + PT_G4], %g4; \
  57         ldd     [%base_reg + REGWIN_SZ + PT_G6], %g6;
  58
  59 #define LOAD_PT_YREG(base_reg, scratch) \
  60         ld      [%base_reg + REGWIN_SZ + PT_Y], %scratch; \
  61         wr      %scratch, 0x0, %y;
  62
  63 #define LOAD_PT_PRIV(base_reg, pt_psr, pt_pc, pt_npc) \
  64         ld      [%base_reg + REGWIN_SZ + PT_PSR], %pt_psr; \
  65         ld      [%base_reg + REGWIN_SZ + PT_PC], %pt_pc; \
  66         ld      [%base_reg + REGWIN_SZ + PT_NPC], %pt_npc;
  67
  68 #define LOAD_PT_ALL(base_reg, pt_psr, pt_pc, pt_npc, scratch) \
  69         LOAD_PT_YREG(base_reg, scratch) \
  70         LOAD_PT_INS(base_reg) \
  71         LOAD_PT_GLOBALS(base_reg) \
  72         LOAD_PT_PRIV(base_reg, pt_psr, pt_pc, pt_npc)
  73
  74 #define STORE_PT_INS(base_reg) \
  75         std     %i0, [%base_reg + REGWIN_SZ + PT_I0]; \
  76         std     %i2, [%base_reg + REGWIN_SZ + PT_I2]; \
  77         std     %i4, [%base_reg + REGWIN_SZ + PT_I4]; \
  78         std     %i6, [%base_reg + REGWIN_SZ + PT_I6];
  79
  80 #define STORE_PT_GLOBALS(base_reg) \
  81         st      %g1, [%base_reg + REGWIN_SZ + PT_G1]; \
  82         std     %g2, [%base_reg + REGWIN_SZ + PT_G2]; \
  83         std     %g4, [%base_reg + REGWIN_SZ + PT_G4]; \
  84         std     %g6, [%base_reg + REGWIN_SZ + PT_G6];
  85
  86 #define STORE_PT_YREG(base_reg, scratch) \
  87         rd      %y, %scratch; \
  88         st      %scratch, [%base_reg + REGWIN_SZ + PT_Y];
  89
  90 #define STORE_PT_PRIV(base_reg, pt_psr, pt_pc, pt_npc) \
  91         st      %pt_psr, [%base_reg + REGWIN_SZ + PT_PSR]; \
  92         st      %pt_pc,  [%base_reg + REGWIN_SZ + PT_PC]; \
  93         st      %pt_npc, [%base_reg + REGWIN_SZ + PT_NPC];
  94
  95 #define STORE_PT_ALL(base_reg, reg_psr, reg_pc, reg_npc, g_scratch) \
  96         STORE_PT_PRIV(base_reg, reg_psr, reg_pc, reg_npc) \
  97         STORE_PT_GLOBALS(base_reg) \
  98         STORE_PT_YREG(base_reg, g_scratch) \
  99         STORE_PT_INS(base_reg)
 100
 101 #define SAVE_BOLIXED_USER_STACK(cur_reg, scratch) \
 102         ld       [%cur_reg + AOFF_task_thread + AOFF_thread_w_saved], %scratch; \
 103         sll      %scratch, 2, %scratch; \
 104         add      %scratch, %cur_reg, %scratch; \
 105         st       %sp, [%scratch + AOFF_task_thread + AOFF_thread_rwbuf_stkptrs]; \
 106         sub      %scratch, %cur_reg, %scratch; \
 107         sll      %scratch, 4, %scratch; \
 108         add      %scratch, %cur_reg, %scratch; \
 109         STORE_WINDOW(scratch + AOFF_task_thread + AOFF_thread_reg_window); \
 110         sub      %scratch, %cur_reg, %scratch; \
 111         srl      %scratch, 6, %scratch; \
 112         add      %scratch, 1, %scratch; \
 113         st       %scratch, [%cur_reg + AOFF_task_thread + AOFF_thread_w_saved];
 114
 115 #ifdef CONFIG_SMP
 116 #define LOAD_CURRENT4M(dest_reg, idreg) \
 117         rd       %tbr, %idreg; \
 118         sethi    %hi(C_LABEL(current_set)), %dest_reg; \
 119         srl      %idreg, 10, %idreg; \
 120         or       %dest_reg, %lo(C_LABEL(current_set)), %dest_reg; \
 121         and      %idreg, 0xc, %idreg; \
 122         ld       [%idreg + %dest_reg], %dest_reg;
 123
 124 /* Sliiick. We have a Linux current register :) -jj */
 125 #define LOAD_CURRENT4D(dest_reg) \
 126         lda      [%g0] ASI_M_VIKING_TMP2, %dest_reg;
 127
 128 /* Blackbox - take care with this... - check smp4m and smp4d before changing this. */
 129 #define LOAD_CURRENT(dest_reg, idreg)                                   \
 130         sethi    %hi(___b_load_current), %idreg;                        \
 131         sethi    %hi(C_LABEL(current_set)), %dest_reg;                  \
 132         sethi    %hi(C_LABEL(boot_cpu_id4)), %idreg;                    \
 133         or       %dest_reg, %lo(C_LABEL(current_set)), %dest_reg;       \
 134         ldub     [%idreg + %lo(C_LABEL(boot_cpu_id4))], %idreg;         \
 135         ld       [%idreg + %dest_reg], %dest_reg;
 136 #else
 137 #define LOAD_CURRENT(dest_reg, idreg) \
 138         sethi    %hi(C_LABEL(current_set)), %idreg; \
 139         ld       [%idreg + %lo(C_LABEL(current_set))], %dest_reg;
 140 #endif
 141
 142 #endif /* !(_SPARC_WINMACRO_H) */