mirror of https://github.com/acidanthera/audk.git
86 lines
3.4 KiB
OpenEdge ABL
86 lines
3.4 KiB
OpenEdge ABL
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// Copyright (c) 2006, Intel Corporation
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// All rights reserved. This program and the accompanying materials
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// are licensed and made available under the terms and conditions of the BSD License
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// which accompanies this distribution. The full text of the license may be found at
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// http://opensource.org/licenses/bsd-license.php
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//
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// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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//
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// Module Name:
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//
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// Ds64Macros.i
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//
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// Abstract:
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//
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// This is set of macros used in calculating offsets in the IVT
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//
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// Revision History:
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//
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//--
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#define EXCPT_EXTERNAL_INTERRUPT 12
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#define MASK_0_4 0x000000000000001F // mask bits 0 through 4
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#define SLOT0 0
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#define SLOT1 1
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#define SLOT2 2
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#define PSR_DT 17
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#define PSR_TB 26
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#define PSR_RT 27
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#define PSR_IS 34
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#define PSR_IT 36
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#define PSR_IC 13
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#define PSR_I 14
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#define PSR_SS 40
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#define PSR_BN 44
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#define PSR_RI_MASK 0x60000000000
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#define EXCPT_EXTERNAL_INTERRUPT 12
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#define SCRATCH_REG0 r23
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#define SCRATCH_REG1 r24
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#define SCRATCH_REG2 r25
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#define SCRATCH_REG3 r26
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#define SCRATCH_REG4 r27
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#define SCRATCH_REG5 r28
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#define SCRATCH_REG6 r29
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#define PR_REG r30
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#define B0_REG r31
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// EXT_INT_OFFSET is the offset of the external interrupt entry in the IVT
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#define EXT_INT_ENTRY_OFFSET 0x03000
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// PATCH_ENTRY_OFFSET is the offset into the IVT of the entry that is coopted (stolen)
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// for use by the handler. The entire entry is restored when the handler is
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// unloaded.
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#define PATCH_ENTRY_OFFSET 0x03400
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// PATCH_BUNDLES is the number of bundles actually in the patch
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#define NUM_PATCH_BUNDLES ((EndPatchCode - PatchCode) / 0x10)
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// A hard coded branch back into the external interrupt IVT entry's second bundle
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// is put here, just in case the original bundle zero did not have a branch
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// This is the last bundle in the reserved IVT entry
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#define FAILSAFE_BRANCH_OFFSET (PATCH_ENTRY_OFFSET + 0x400 - 0x10)
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// the original external interrupt IVT entry bundle zero is copied and relocated
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// here... also in the reserved IVT entry
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// This is the second-to-last bundle in the reserved IVT entry
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#define RELOCATED_EXT_INT (PATCH_ENTRY_OFFSET + 0x400 - 0x20)
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// The patch is actually stored at the end of IVT:PATCH_ENTRY. The PATCH_OFFSET
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// is the offset into IVT where the patch is actually stored. It is carefully
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// located so that when we run out of patch code, the next bundle is the
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// relocated bundle 0 from the original external interrupt handler
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#define PATCH_OFFSET (PATCH_ENTRY_OFFSET + 0x400 - ( EndPatchCode - PatchCode ) - 0x20)
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#define PATCH_RETURN_OFFSET (PATCH_ENTRY_OFFSET + 0x400 - ( EndPatchCode - PatchCodeRet ) - 0x20)
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// PATCH_BRANCH is used only in the new bundle that is placed at the beginning
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// of the external interrupt IVT entry.
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#define PATCH_BRANCH (PATCH_OFFSET - EXT_INT_ENTRY_OFFSET)
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