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ed8717c5 | 1 | /** @file\r |
2 | PAL Call Services Function.\r | |
3 | \r | |
08a458be | 4 | Copyright (c) 2006 -2008, Intel Corporation All rights\r |
5 | reserved. This program and the accompanying materials are\r | |
6 | licensed and made available under the terms and conditions of\r | |
7 | the BSD License which accompanies this distribution. The full\r | |
8 | text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
ed8717c5 | 10 | \r |
08a458be | 11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
ed8717c5 | 13 | \r |
14 | **/\r | |
15 | \r | |
16 | \r | |
17 | #include <PiPei.h>\r | |
ed8717c5 | 18 | \r |
19 | #include <Ppi/SecPlatformInformation.h>\r | |
20 | \r | |
4d52c1f3 | 21 | #include <Library/PalLib.h>\r |
ed8717c5 | 22 | #include <Library/PeiServicesTablePointerLib.h>\r |
23 | #include <Library/PeiServicesLib.h>\r | |
24 | #include <Library/BaseLib.h>\r | |
25 | #include <Library/DebugLib.h>\r | |
26 | \r | |
27 | /**\r | |
ed8717c5 | 28 | Makes a PAL procedure call.\r |
4cb0344e | 29 | \r |
ed8717c5 | 30 | This is a wrapper function to make a PAL procedure call. Based on the Index value,\r |
31 | this API will make static or stacked PAL call. Architected procedures may be designated\r | |
32 | as required or optional. If a PAL procedure is specified as optional, a unique return\r | |
33 | code of 0xFFFFFFFFFFFFFFFF is returned in the Status field of the PAL_CALL_RETURN structure.\r | |
34 | This indicates that the procedure is not present in this PAL implementation. It is the\r | |
ac644614 | 35 | caller's responsibility to check for this return code after calling any optional PAL\r |
ed8717c5 | 36 | procedure. No parameter checking is performed on the 4 input parameters, but there are\r |
37 | some common rules that the caller should follow when making a PAL call. Any address\r | |
38 | passed to PAL as buffers for return parameters must be 8-byte aligned. Unaligned addresses\r | |
39 | may cause undefined results. For those parameters defined as reserved or some fields\r | |
40 | defined as reserved must be zero filled or the invalid argument return value may be\r | |
41 | returned or undefined result may occur during the execution of the procedure.\r | |
42 | This function is only available on IPF.\r | |
43 | \r | |
4cb0344e | 44 | @param Index The PAL procedure Index number.\r |
45 | @param Arg2 The 2nd parameter for PAL procedure calls.\r | |
46 | @param Arg3 The 3rd parameter for PAL procedure calls.\r | |
47 | @param Arg4 The 4th parameter for PAL procedure calls.\r | |
ed8717c5 | 48 | \r |
4cb0344e | 49 | @return Structure returned from the PAL Call procedure, including the status and return value.\r |
ed8717c5 | 50 | \r |
51 | **/\r | |
52 | PAL_CALL_RETURN\r | |
53 | EFIAPI\r | |
54 | PalCall (\r | |
55 | IN UINT64 Index,\r | |
56 | IN UINT64 Arg2,\r | |
57 | IN UINT64 Arg3,\r | |
58 | IN UINT64 Arg4\r | |
59 | )\r | |
60 | {\r | |
61 | UINT64 PalCallAddress;\r | |
62 | PAL_CALL_RETURN ReturnVal;\r | |
a88c8915 | 63 | CONST EFI_PEI_SERVICES **PeiServices;\r |
ed8717c5 | 64 | EFI_STATUS Status;\r |
65 | EFI_SEC_PLATFORM_INFORMATION_PPI *SecPlatformPpi;\r | |
66 | IPF_HANDOFF_STATUS IpfStatus;\r | |
67 | UINT64 RecordSize;\r | |
68 | \r | |
69 | //\r | |
4cb0344e | 70 | // Get PEI Service Table Pointer\r |
ed8717c5 | 71 | //\r |
5240b97c | 72 | PeiServices = GetPeiServicesTablePointer ();\r |
ed8717c5 | 73 | \r |
74 | //\r | |
4cb0344e | 75 | // Locate SEC Platform Information PPI\r |
ed8717c5 | 76 | //\r |
ed8717c5 | 77 | Status = PeiServicesLocatePpi (\r |
4cb0344e | 78 | &gEfiSecPlatformInformationPpiGuid,\r |
79 | 0,\r | |
80 | NULL,\r | |
81 | (VOID **)&SecPlatformPpi\r | |
82 | );\r | |
ed8717c5 | 83 | ASSERT_EFI_ERROR (Status);\r |
84 | \r | |
4cb0344e | 85 | //\r |
86 | // Retrieve PAL call address from platform information reported by the PPI\r | |
87 | //\r | |
ed8717c5 | 88 | RecordSize = sizeof (IpfStatus);\r |
89 | SecPlatformPpi->PlatformInformation (\r | |
4cb0344e | 90 | PeiServices,\r |
91 | &RecordSize,\r | |
92 | (EFI_SEC_PLATFORM_INFORMATION_RECORD *) &IpfStatus\r | |
93 | );\r | |
ed8717c5 | 94 | PalCallAddress = IpfStatus.PalCallAddress;\r |
95 | \r | |
96 | ReturnVal = AsmPalCall (PalCallAddress, Index, Arg2, Arg3, Arg4);\r | |
97 | \r | |
98 | return ReturnVal;\r | |
99 | }\r | |
100 | \r |