EdkModulePkg/Universal/DebugSupport/Dxe/ipf/Ds64Macros.i

   1 //++
   2 // Copyright (c) 2006, Intel Corporation
   3 // All rights reserved. This program and the accompanying materials
   4 // are licensed and made available under the terms and conditions of the BSD License
   5 // which accompanies this distribution.  The full text of the license may be found at
   6 // http://opensource.org/licenses/bsd-license.php
   7 //
   8 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   9 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  10 //
  11 // Module Name:
  12 //
  13 //  Ds64Macros.i
  14 //
  15 // Abstract:
  16 //
  17 //  This is set of macros used in calculating offsets in the IVT
  18 //
  19 // Revision History:
  20 //
  21 //--
  22
  23 #define EXCPT_EXTERNAL_INTERRUPT 12
  24 #define MASK_0_4        0x000000000000001F  // mask bits 0 through 4
  25 #define SLOT0           0
  26 #define SLOT1           1
  27 #define SLOT2           2
  28
  29 #define PSR_DT          17
  30 #define PSR_TB          26
  31 #define PSR_RT          27
  32 #define PSR_IS          34
  33 #define PSR_IT          36
  34 #define PSR_IC          13
  35 #define PSR_I           14
  36 #define PSR_SS          40
  37 #define PSR_BN          44
  38 #define PSR_RI_MASK     0x60000000000
  39
  40 #define EXCPT_EXTERNAL_INTERRUPT 12
  41
  42 #define SCRATCH_REG0    r23
  43 #define SCRATCH_REG1    r24
  44 #define SCRATCH_REG2    r25
  45 #define SCRATCH_REG3    r26
  46 #define SCRATCH_REG4    r27
  47 #define SCRATCH_REG5    r28
  48 #define SCRATCH_REG6    r29
  49 #define PR_REG          r30
  50 #define B0_REG          r31
  51
  52
  53 // EXT_INT_OFFSET is the offset of the external interrupt entry in the IVT
  54 #define EXT_INT_ENTRY_OFFSET    0x03000
  55
  56 // PATCH_ENTRY_OFFSET is the offset into the IVT of the entry that is coopted (stolen)
  57 // for use by the handler.  The entire entry is restored when the handler is
  58 // unloaded.
  59 #define PATCH_ENTRY_OFFSET      0x03400
  60
  61 // PATCH_BUNDLES is the number of bundles actually in the patch
  62 #define NUM_PATCH_BUNDLES       ((EndPatchCode - PatchCode) / 0x10)
  63
  64 // A hard coded branch back into the external interrupt IVT entry's second bundle
  65 // is put here, just in case the original bundle zero did not have a branch
  66 // This is the last bundle in the reserved IVT entry
  67 #define FAILSAFE_BRANCH_OFFSET  (PATCH_ENTRY_OFFSET + 0x400 - 0x10)
  68
  69 // the original external interrupt IVT entry bundle zero is copied and relocated
  70 // here... also in the reserved IVT entry
  71 // This is the second-to-last bundle in the reserved IVT entry
  72 #define RELOCATED_EXT_INT       (PATCH_ENTRY_OFFSET + 0x400 - 0x20)
  73
  74 // The patch is actually stored at the end of IVT:PATCH_ENTRY.  The PATCH_OFFSET
  75 // is the offset into IVT where the patch is actually stored.  It is carefully
  76 // located so that when we run out of patch code, the next bundle is the
  77 // relocated bundle 0 from the original external interrupt handler
  78 #define PATCH_OFFSET            (PATCH_ENTRY_OFFSET + 0x400 - ( EndPatchCode - PatchCode ) - 0x20)
  79
  80 #define PATCH_RETURN_OFFSET     (PATCH_ENTRY_OFFSET + 0x400 - ( EndPatchCode - PatchCodeRet ) - 0x20)
  81
  82 // PATCH_BRANCH is used only in the new bundle that is placed at the beginning
  83 // of the external interrupt IVT entry.
  84 #define PATCH_BRANCH            (PATCH_OFFSET - EXT_INT_ENTRY_OFFSET)
  85