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1 | /**@file\r | |
2 | Xen Platform PEI support\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r | |
5 | Copyright (c) 2011, Andrei Warkentin <andreiw@motorola.com>\r | |
6 | \r | |
7 | This program and the accompanying materials\r | |
8 | are licensed and made available under the terms and conditions of the BSD License\r | |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | //\r | |
18 | // The package level header files this module uses\r | |
19 | //\r | |
20 | #include <PiPei.h>\r | |
21 | \r | |
22 | //\r | |
23 | // The Library classes this module consumes\r | |
24 | //\r | |
25 | #include <Library/DebugLib.h>\r | |
26 | #include <Library/HobLib.h>\r | |
27 | #include <Library/MemoryAllocationLib.h>\r | |
28 | #include <Library/PcdLib.h>\r | |
29 | #include <Guid/XenInfo.h>\r | |
30 | \r | |
31 | #include "Platform.h"\r | |
32 | \r | |
33 | EFI_XEN_INFO mXenInfo;\r | |
34 | \r | |
35 | \r | |
36 | /**\r | |
37 | Connects to the Hypervisor.\r | |
38 | \r | |
39 | @param XenLeaf CPUID index used to connect.\r | |
40 | \r | |
41 | @return EFI_STATUS\r | |
42 | \r | |
43 | **/\r | |
44 | EFI_STATUS\r | |
45 | XenConnect (\r | |
46 | UINT32 XenLeaf\r | |
47 | )\r | |
48 | {\r | |
49 | UINT32 Index;\r | |
50 | UINT32 TransferReg;\r | |
51 | UINT32 TransferPages;\r | |
52 | UINT32 XenVersion;\r | |
53 | \r | |
54 | AsmCpuid (XenLeaf + 2, &TransferPages, &TransferReg, NULL, NULL);\r | |
55 | mXenInfo.HyperPages = AllocatePages (TransferPages);\r | |
56 | if (!mXenInfo.HyperPages) {\r | |
57 | return EFI_OUT_OF_RESOURCES;\r | |
58 | }\r | |
59 | \r | |
60 | for (Index = 0; Index < TransferPages; Index++) {\r | |
61 | AsmWriteMsr64 (TransferReg,\r | |
62 | (UINTN) mXenInfo.HyperPages +\r | |
63 | (Index << EFI_PAGE_SHIFT) + Index);\r | |
64 | }\r | |
65 | \r | |
66 | AsmCpuid (XenLeaf + 1, &XenVersion, NULL, NULL, NULL);\r | |
67 | DEBUG ((EFI_D_ERROR, "Detected Xen version %d.%d\n",\r | |
68 | XenVersion >> 16, XenVersion & 0xFFFF));\r | |
69 | mXenInfo.VersionMajor = (UINT16)(XenVersion >> 16);\r | |
70 | mXenInfo.VersionMinor = (UINT16)(XenVersion & 0xFFFF);\r | |
71 | \r | |
72 | /* TBD: Locate hvm_info and reserve it away. */\r | |
73 | mXenInfo.HvmInfo = NULL;\r | |
74 | \r | |
75 | BuildGuidDataHob (\r | |
76 | &gEfiXenInfoGuid,\r | |
77 | &mXenInfo,\r | |
78 | sizeof(mXenInfo)\r | |
79 | );\r | |
80 | \r | |
81 | return EFI_SUCCESS;\r | |
82 | }\r | |
83 | \r | |
84 | /**\r | |
85 | Figures out if we are running inside Xen HVM.\r | |
86 | \r | |
87 | @return UINT32 CPUID index used to connect to HV.\r | |
88 | \r | |
89 | **/\r | |
90 | UINT32\r | |
91 | XenDetect (\r | |
92 | VOID\r | |
93 | )\r | |
94 | {\r | |
95 | \r | |
96 | UINT32 XenLeaf;\r | |
97 | UINT8 Signature[13];\r | |
98 | \r | |
99 | for (XenLeaf = 0x40000000; XenLeaf < 0x40010000; XenLeaf += 0x100) {\r | |
100 | AsmCpuid (XenLeaf, NULL, (UINT32 *) &Signature[0],\r | |
101 | (UINT32 *) &Signature[4],\r | |
102 | (UINT32 *) &Signature[8]);\r | |
103 | Signature[12] = '\0';\r | |
104 | \r | |
105 | if (!AsciiStrCmp ((CHAR8 *) Signature, "XenVMMXenVMM")) {\r | |
106 | return XenLeaf;\r | |
107 | }\r | |
108 | }\r | |
109 | \r | |
110 | return 0;\r | |
111 | }\r | |
112 | \r | |
113 | /**\r | |
114 | Perform Xen PEI initialization.\r | |
115 | \r | |
116 | @return EFI_SUCCESS Xen initialized successfully\r | |
117 | @return EFI_NOT_FOUND Not running under Xen\r | |
118 | \r | |
119 | **/\r | |
120 | EFI_STATUS\r | |
121 | InitializeXen (\r | |
122 | UINT32 XenLeaf\r | |
123 | )\r | |
124 | {\r | |
125 | XenConnect (XenLeaf);\r | |
126 | \r | |
127 | //\r | |
128 | // Reserve away HVMLOADER reserved memory [0xFC000000,0xFD000000).\r | |
129 | // This needs to match HVMLOADER RESERVED_MEMBASE/RESERVED_MEMSIZE.\r | |
130 | //\r | |
131 | AddReservedMemoryBaseSizeHob (0xFC000000, 0x1000000);\r | |
132 | \r | |
133 | return EFI_SUCCESS;\r | |
134 | }\r |