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//++ |
// Copyright (c) 1996-99 Intel Corp. |
// All Rights Reserved |
// |
// INTEL CORPORATION PROPRIETARY INFORMATION |
// |
// This software is supplied under the terms of a license |
// agreement or nondisclosure agreement with Intel Corpo- |
// ration and may not be copied or disclosed except in |
// accordance with the terms of that agreement. |
// |
// |
// |
// Module Name: |
// |
// palproc.s |
// |
// Abstract: |
// |
// Contains an implementation for making PAL PROC calls on |
// IA-64 architecture. |
// |
// |
// |
// Revision History: |
// |
//-- |
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.file "palproc.s" |
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#include "palproc.h" |
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//----------------------------------------------------------------------------- |
//++ |
// MakeStaticPALCall |
// |
// This routine is called whenever an architected static calling convention |
// based PAL call is to be made. This call does use RSE actually, but our policy |
// in making static PAL calls before memory is available is to make sure that |
// we do not nest too deep and allocate beyond 96 banked registers. In other |
// words we carefully code calls and control flow before memory is available. |
// |
// Arguments : All parameters set up to do static PAL call. |
// |
// On Entry : |
// |
// Return Value: |
// |
// As per static calling conventions. |
// |
//-- |
//--------------------------------------------------------------------------- |
PROCEDURE_ENTRY(MakeStaticPALCall) |
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NESTED_SETUP (5,8,0,0) |
mov loc3 = b5 |
mov loc4 = r2 |
mov loc7 = r1;; |
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movl loc6 = PAL_MC_CLEAR_LOG |
mov r2 = psr;; |
mov loc5 = r2 |
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cmp.eq p6,p7 = r28,loc6;; |
(p7)movl loc6 = PAL_MC_DYNAMIC_STATE;; |
(p7)cmp.eq p6,p7 = r28,loc6;; |
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(p7)movl loc6 = PAL_MC_ERROR_INFO;; |
(p7)cmp.eq p6,p7 = r28,loc6;; |
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(p7)movl loc6 = PAL_MC_RESUME;; |
(p7)cmp.eq p6,p7 = r28,loc6 |
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mov loc6 = 0x1;; |
(p7)dep r2 = loc6,r2,13,1;; // psr.ic = 1 |
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// p6 will be true, if it is one of the MCHK calls. There has been lots of debate |
// on psr.ic for these values. For now, do not do any thing to psr.ic |
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// (p6)dep r2 = r0,r2,13,1;; // psr.ic = 0 |
dep r2 = r0,r2,14,1;; // psr.i = 0 |
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mov psr.l = r2 |
srlz.d;; // Needs data serailization. |
srlz.i;; // Needs instruction serailization. |
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StaticGetPALLocalIP: |
mov loc2 = ip;; |
add loc2 = StaticComeBackFromPALCall - StaticGetPALLocalIP,loc2;; |
mov b0 = loc2 // return address after Pal call |
mov r28 = in1 // get the input parameters to PAL call |
mov r29 = in2 |
mov r30 = in3;; |
mov r31 = in4 |
mov b5 = in0;; // get the PalProcEntrypt from input |
br.sptk b5 // Take the plunge. |
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StaticComeBackFromPALCall: |
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mov psr.l = loc5;; |
srlz.d;; // Needs data serailization. |
srlz.i;; // Needs instruction serailization. |
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mov b5 = loc3 |
mov r2 = loc4 |
mov r1 = loc7 |
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NESTED_RETURN |
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PROCEDURE_EXIT(MakeStaticPALCall) |
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//----------------------------------------------------------------------------- |
//++ |
// MakeStackedPALCall |
// |
// This routine is called whenever an architected stacked calling convention |
// based PAL call is to be made. This call is made after memory is available. |
// Although stacked calls could be made directly from 'C', there is a PAL |
// requirement which forces the index to be in GR28 and hence this stub is |
// needed |
// |
// Arguments : All parameters set up to do stacted PAL call. |
// |
// On Entry : |
// in0: PAL_PROC entrypoint |
// in1-in4 : PAL_PROC arguments |
// |
// Return Value: |
// |
// As per stacked calling conventions. |
// |
//-- |
//--------------------------------------------------------------------------- |
PROCEDURE_ENTRY(MakeStackedPALCall) |
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NESTED_SETUP (5,8,4,0) |
mov loc3 = b5 |
mov loc4 = r2 |
mov loc7 = r1 |
mov r2 = psr;; |
mov loc5 = r2;; |
dep r2 = r0,r2,14,1;; // psr.i = 0 |
mov psr.l = r2 |
srlz.d;; // Needs data serailization. |
srlz.i;; // Needs instruction serailization. |
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StackedGetPALLocalIP: |
mov r28 = in1 // get the input parameters to PAL call |
mov out0 = in1 |
mov out1 = in2;; |
mov out2 = in3 |
mov out3 = in4 |
mov b5 = in0;; // get the PalProcEntrypt from input |
br.call.dpnt b0=b5;; // Take the plunge. |
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StackedComeBackFromPALCall: |
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mov psr.l = loc5;; |
srlz.d;; // Needs data serailization. |
srlz.i;; // Needs instruction serailization. |
mov b5 = loc3 |
mov r2 = loc4 |
mov r1 = loc7 |
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NESTED_RETURN |
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PROCEDURE_EXIT(MakeStackedPALCall) |
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