-/// @file\r
-/// Contains an implementation of CallPalProcStacked on Itanium-based\r
-/// architecture.\r
-///\r
-/// Copyright (c) 2006, Intel Corporation\r
-/// All rights reserved. This program and the accompanying materials\r
-/// are licensed and made available under the terms and conditions of the BSD License\r
-/// which accompanies this distribution. The full text of the license may be found at\r
-/// http://opensource.org/licenses/bsd-license.php\r
-///\r
-/// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
-/// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-///\r
-/// Module Name: AsmPalCall.s\r
-///\r
-///\r
-\r
-\r
-//-----------------------------------------------------------------------------\r
-//++\r
-// AsmPalCall\r
-//\r
-// Makes a PAL procedure call.\r
-// This is function to make a PAL procedure call. Based on the Index\r
-// value this API will make static or stacked PAL call. The following table\r
-// describes the usage of PAL Procedure Index Assignment. Architected procedures\r
-// may be designated as required or optional. If a PAL procedure is specified\r
-// as optional, a unique return code of 0xFFFFFFFFFFFFFFFF is returned in the\r
-// Status field of the PAL_CALL_RETURN structure.\r
-// This indicates that the procedure is not present in this PAL implementation.\r
-// It is the caller¡¯s responsibility to check for this return code after calling\r
-// any optional PAL procedure.\r
-// No parameter checking is performed on the 5 input parameters, but there are\r
-// some common rules that the caller should follow when making a PAL call. Any\r
-// address passed to PAL as buffers for return parameters must be 8-byte aligned.\r
-// Unaligned addresses may cause undefined results. For those parameters defined\r
-// as reserved or some fields defined as reserved must be zero filled or the invalid\r
-// argument return value may be returned or undefined result may occur during the\r
-// execution of the procedure. If the PalEntryPoint does not point to a valid\r
-// PAL entry point then the system behavior is undefined. This function is only\r
-// available on IPF.\r
-//\r
-// On Entry :\r
-// in0: PAL_PROC entrypoint\r
-// in1-in4 : PAL_PROC arguments\r
-//\r
-// Return Value:\r
-//\r
-// As per stacked calling conventions.\r
-//\r
-//--\r
-//---------------------------------------------------------------------------\r
-\r
-//\r
-// PAL function calls\r
-//\r
-#define PAL_MC_CLEAR_LOG 0x0015\r
-#define PAL_MC_DYNAMIC_STATE 0x0018\r
-#define PAL_MC_ERROR_INFO 0x0019\r
-#define PAL_MC_RESUME 0x001a\r
-\r
-\r
-.text\r
-.proc AsmPalCall\r
-.type AsmPalCall, @function\r
-\r
-AsmPalCall::\r
- alloc loc1 = ar.pfs,5,8,4,0\r
- mov loc0 = b0\r
- mov loc3 = b5\r
- mov loc4 = r2\r
- mov loc7 = r1\r
- mov r2 = psr;;\r
- mov r28 = in1\r
- mov loc5 = r2;;\r
-\r
- movl loc6 = 0x100;;\r
- cmp.ge p6,p7 = r28,loc6;;\r
-\r
-(p6) movl loc6 = 0x1FF;;\r
-(p7) br.dpnt.few PalCallStatic;; // 0 ~ 255 make a static Pal Call\r
-(p6) cmp.le p6,p7 = r28,loc6;;\r
-(p6) br.dpnt.few PalCallStacked;; // 256 ~ 511 make a stacked Pal Call\r
-(p7) movl loc6 = 0x300;;\r
-(p7) cmp.ge p6,p7 = r28,loc6;;\r
-(p7) br.dpnt.few PalCallStatic;; // 512 ~ 767 make a static Pal Call\r
-(p6) movl loc6 = 0x3FF;;\r
-(p6) cmp.le p6,p7 = r28,loc6;;\r
-(p6) br.dpnt.few PalCallStacked;; // 768 ~ 1023 make a stacked Pal Call\r
-\r
-(p7) mov r8 = 0xFFFFFFFFFFFFFFFF;; // > 1024 return invalid\r
-(p7) br.dpnt.few ComeBackFromPALCall;;\r
-\r
-PalCallStatic:\r
- movl loc6 = PAL_MC_CLEAR_LOG;;\r
- cmp.eq p6,p7 = r28,loc6;;\r
-\r
-(p7) movl loc6 = PAL_MC_DYNAMIC_STATE;;\r
-(p7) cmp.eq p6,p7 = r28,loc6;;\r
-\r
-(p7) movl loc6 = PAL_MC_ERROR_INFO;;\r
-(p7) cmp.eq p6,p7 = r28,loc6;;\r
-\r
-(p7) movl loc6 = PAL_MC_RESUME;;\r
-(p7) cmp.eq p6,p7 = r28,loc6 ;;\r
-\r
- mov loc6 = 0x1;;\r
-(p7) dep r2 = loc6,r2,13,1;; // psr.ic = 1\r
-\r
-// p6 will be true, if it is one of the MCHK calls. There has been lots of debate\r
-// on psr.ic for these values. For now, do not do any thing to psr.ic\r
-\r
- dep r2 = r0,r2,14,1;; // psr.i = 0\r
-\r
- mov psr.l = r2\r
- srlz.d // Needs data serailization.\r
- srlz.i // Needs instruction serailization.\r
-\r
-StaticGetPALLocalIP:\r
- mov loc2 = ip;;\r
- add loc2 = ComeBackFromPALCall - StaticGetPALLocalIP,loc2;;\r
- mov b0 = loc2 // return address after Pal call\r
-\r
- mov r29 = in2\r
- mov r30 = in3\r
- mov r31 = in4\r
- mov b5 = in0;; // get the PalProcEntrypt from input\r
- br.sptk b5;; // Take the plunge.\r
-\r
-PalCallStacked:\r
- dep r2 = r0,r2,14,1;; // psr.i = 0\r
- mov psr.l = r2;;\r
- srlz.d // Needs data serailization.\r
- srlz.i // Needs instruction serailization.\r
-\r
-StackedGetPALLocalIP:\r
- mov out0 = in1\r
- mov out1 = in2\r
- mov out2 = in3\r
- mov out3 = in4\r
- mov b5 = in0 ;; // get the PalProcEntrypt from input\r
- br.call.dpnt b0 = b5 ;; // Take the plunge.\r
-\r
-ComeBackFromPALCall:\r
- mov psr.l = loc5 ;;\r
- srlz.d // Needs data serailization.\r
- srlz.i // Needs instruction serailization.\r
-\r
- mov b5 = loc3\r
- mov r2 = loc4\r
- mov r1 = loc7\r
-\r
- mov b0 = loc0\r
- mov ar.pfs = loc1;;\r
- br.ret.dpnt b0;;\r
-\r
-.endp AsmPalCall\r
-\r
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