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1 | /** @file\r | |
2 | Provides library services to make PAL Calls.\r | |
3 | \r | |
4 | The PAL Library provides a service to make a PAL CALL. This service is identical\r | |
5 | in functionality to AsmPalCall() in the functions of the Base Library specific to Intel Itanium architecture.\r | |
6 | The only difference is that the PAL Entry Point is not passed in. Implementations\r | |
7 | of this library class must manage PAL Entry Point on their own. For example, a PEI\r | |
8 | implementation can use a PPI to lookup the PAL Entry Point, and a DXE implementation\r | |
9 | can contain a constructor to look up the PAL Entry Point from a HOB. This library class \r | |
10 | is only available on Intel Itanium-based platforms.\r | |
11 | \r | |
12 | Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r | |
13 | This program and the accompanying materials \r | |
14 | are licensed and made available under the terms and conditions of the BSD License \r | |
15 | which accompanies this distribution. The full text of the license may be found at \r | |
16 | http://opensource.org/licenses/bsd-license.php \r | |
17 | \r | |
18 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
19 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
20 | \r | |
21 | **/\r | |
22 | \r | |
23 | #ifndef __PAL_CALL_LIB_H__\r | |
24 | #define __PAL_CALL_LIB_H__\r | |
25 | \r | |
26 | #include <IndustryStandard/Pal.h>\r | |
27 | \r | |
28 | /**\r | |
29 | Makes a PAL procedure call.\r | |
30 | \r | |
31 | This is a wrapper function to make a PAL procedure call. Based on the Index value,\r | |
32 | this API will make static or stacked PAL call. Architected procedures may be designated\r | |
33 | as required or optional. If a PAL procedure is specified as optional, a unique return\r | |
34 | code of 0xFFFFFFFFFFFFFFFF is returned in the Status field of the PAL_CALL_RETURN structure.\r | |
35 | This indicates that the procedure is not present in this PAL implementation. It is the\r | |
36 | caller's responsibility to check for this return code after calling any optional PAL\r | |
37 | procedure. No parameter checking is performed on the 4 input parameters, but there are\r | |
38 | some common rules that the caller should follow when making a PAL call. Any address\r | |
39 | passed to PAL as buffers for return parameters must be 8-byte aligned. Unaligned addresses\r | |
40 | may cause undefined results. For those parameters defined as reserved or some fields\r | |
41 | defined as reserved must be zero filled or the invalid argument return value may be\r | |
42 | returned or undefined result may occur during the execution of the procedure.\r | |
43 | This function is only available on Intel Itanium-based platforms.\r | |
44 | \r | |
45 | @param Index The PAL procedure Index number.\r | |
46 | @param Arg2 The 2nd parameter for PAL procedure calls.\r | |
47 | @param Arg3 The 3rd parameter for PAL procedure calls.\r | |
48 | @param Arg4 The 4th parameter for PAL procedure calls.\r | |
49 | \r | |
50 | @return Structure returned from the PAL Call procedure, including the status and return value.\r | |
51 | \r | |
52 | **/\r | |
53 | PAL_CALL_RETURN\r | |
54 | EFIAPI\r | |
55 | PalCall (\r | |
56 | IN UINT64 Index,\r | |
57 | IN UINT64 Arg2,\r | |
58 | IN UINT64 Arg3,\r | |
59 | IN UINT64 Arg4\r | |
60 | );\r | |
61 | \r | |
62 | #endif\r | |
63 | \r |