[48674] | 1 | /** @file
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| 2 | Sample ACPI Platform Driver
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| 3 |
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[80721] | 4 | Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.<BR>
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| 5 | SPDX-License-Identifier: BSD-2-Clause-Patent
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[48674] | 6 |
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[58466] | 7 | **/
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[48674] | 8 |
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| 9 | #include <PiDxe.h>
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| 10 |
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| 11 | #include <Protocol/AcpiTable.h>
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| 12 | #include <Protocol/FirmwareVolume2.h>
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| 13 |
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| 14 | #include <Library/BaseLib.h>
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| 15 | #include <Library/UefiBootServicesTableLib.h>
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| 16 | #include <Library/DebugLib.h>
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| 17 | #include <Library/PcdLib.h>
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| 18 |
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| 19 | #include <IndustryStandard/Acpi.h>
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| 20 |
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| 21 | /**
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| 22 | Locate the first instance of a protocol. If the protocol requested is an
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| 23 | FV protocol, then it will return the first FV that contains the ACPI table
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| 24 | storage file.
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| 25 |
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| 26 | @param Instance Return pointer to the first instance of the protocol
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| 27 |
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| 28 | @return EFI_SUCCESS The function completed successfully.
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| 29 | @return EFI_NOT_FOUND The protocol could not be located.
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| 30 | @return EFI_OUT_OF_RESOURCES There are not enough resources to find the protocol.
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| 31 |
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| 32 | **/
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| 33 | EFI_STATUS
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| 34 | LocateFvInstanceWithTables (
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| 35 | OUT EFI_FIRMWARE_VOLUME2_PROTOCOL **Instance
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| 36 | )
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| 37 | {
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| 38 | EFI_STATUS Status;
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| 39 | EFI_HANDLE *HandleBuffer;
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| 40 | UINTN NumberOfHandles;
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| 41 | EFI_FV_FILETYPE FileType;
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| 42 | UINT32 FvStatus;
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| 43 | EFI_FV_FILE_ATTRIBUTES Attributes;
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| 44 | UINTN Size;
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| 45 | UINTN Index;
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| 46 | EFI_FIRMWARE_VOLUME2_PROTOCOL *FvInstance;
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| 47 |
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| 48 | FvStatus = 0;
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| 49 |
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| 50 | //
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| 51 | // Locate protocol.
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| 52 | //
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| 53 | Status = gBS->LocateHandleBuffer (
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| 54 | ByProtocol,
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| 55 | &gEfiFirmwareVolume2ProtocolGuid,
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| 56 | NULL,
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| 57 | &NumberOfHandles,
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| 58 | &HandleBuffer
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| 59 | );
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| 60 | if (EFI_ERROR (Status)) {
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| 61 | //
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| 62 | // Defined errors at this time are not found and out of resources.
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| 63 | //
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| 64 | return Status;
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| 65 | }
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| 66 |
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| 67 |
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| 68 |
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| 69 | //
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| 70 | // Looking for FV with ACPI storage file
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| 71 | //
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| 72 |
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| 73 | for (Index = 0; Index < NumberOfHandles; Index++) {
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| 74 | //
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| 75 | // Get the protocol on this handle
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| 76 | // This should not fail because of LocateHandleBuffer
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| 77 | //
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| 78 | Status = gBS->HandleProtocol (
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| 79 | HandleBuffer[Index],
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| 80 | &gEfiFirmwareVolume2ProtocolGuid,
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| 81 | (VOID**) &FvInstance
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| 82 | );
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| 83 | ASSERT_EFI_ERROR (Status);
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| 84 |
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| 85 | //
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| 86 | // See if it has the ACPI storage file
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| 87 | //
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| 88 | Status = FvInstance->ReadFile (
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| 89 | FvInstance,
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| 90 | (EFI_GUID*)PcdGetPtr (PcdAcpiTableStorageFile),
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| 91 | NULL,
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| 92 | &Size,
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| 93 | &FileType,
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| 94 | &Attributes,
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| 95 | &FvStatus
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| 96 | );
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| 97 |
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| 98 | //
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| 99 | // If we found it, then we are done
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| 100 | //
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| 101 | if (Status == EFI_SUCCESS) {
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| 102 | *Instance = FvInstance;
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| 103 | break;
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| 104 | }
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| 105 | }
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| 106 |
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| 107 | //
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| 108 | // Our exit status is determined by the success of the previous operations
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| 109 | // If the protocol was found, Instance already points to it.
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| 110 | //
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| 111 |
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| 112 | //
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| 113 | // Free any allocated buffers
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| 114 | //
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| 115 | gBS->FreePool (HandleBuffer);
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| 116 |
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| 117 | return Status;
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| 118 | }
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| 119 |
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| 120 |
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| 121 | /**
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| 122 | This function calculates and updates an UINT8 checksum.
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| 123 |
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| 124 | @param Buffer Pointer to buffer to checksum
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| 125 | @param Size Number of bytes to checksum
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| 126 |
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| 127 | **/
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| 128 | VOID
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| 129 | AcpiPlatformChecksum (
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| 130 | IN UINT8 *Buffer,
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| 131 | IN UINTN Size
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| 132 | )
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| 133 | {
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| 134 | UINTN ChecksumOffset;
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| 135 |
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| 136 | ChecksumOffset = OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER, Checksum);
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| 137 |
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| 138 | //
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| 139 | // Set checksum to 0 first
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| 140 | //
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| 141 | Buffer[ChecksumOffset] = 0;
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| 142 |
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| 143 | //
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| 144 | // Update checksum value
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| 145 | //
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| 146 | Buffer[ChecksumOffset] = CalculateCheckSum8(Buffer, Size);
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| 147 | }
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| 148 |
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| 149 |
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[58175] | 150 | #ifdef VBOX
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| 151 |
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[90907] | 152 | /* Disables the old code only copying a selection of tables, missing out a bunch of things available in the XSDT/RSDT. */
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| 153 | # define ACPI_NO_STATIC_TABLES_SELECTION 1
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| 154 |
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[58175] | 155 | # define ACPI_RSD_PTR SIGNATURE_64('R', 'S', 'D', ' ', 'P', 'T', 'R', ' ')
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| 156 | # define EBDA_BASE (0x9FC0 << 4)
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| 157 |
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| 158 | VOID *
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| 159 | FindAcpiRsdPtr(VOID)
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| 160 | {
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| 161 | UINTN Address;
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| 162 | UINTN Index;
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| 163 |
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| 164 | //
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| 165 | // First Search 0x0e0000 - 0x0fffff for RSD Ptr
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| 166 | //
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| 167 | for (Address = 0xe0000; Address < 0xfffff; Address += 0x10) {
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| 168 | if (*(UINT64 *)(Address) == ACPI_RSD_PTR) {
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| 169 | return (VOID *)Address;
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| 170 | }
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| 171 | }
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| 172 |
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| 173 | //
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| 174 | // Search EBDA
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| 175 | //
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| 176 | Address = EBDA_BASE;
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| 177 | for (Index = 0; Index < 0x400 ; Index += 16) {
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| 178 | if (*(UINT64 *)(Address + Index) == ACPI_RSD_PTR) {
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| 179 | return (VOID *)Address;
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| 180 | }
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| 181 | }
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| 182 | return NULL;
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| 183 | }
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| 184 |
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[90907] | 185 | #ifndef ACPI_NO_STATIC_TABLES_SELECTION
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[58175] | 186 | VOID *FindSignature(VOID* Start, UINT32 Signature, BOOLEAN NoChecksum)
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| 187 | {
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| 188 | UINT8 *Ptr = (UINT8*)Start;
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| 189 | UINT32 Count = 0x10000; // 16 pages
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| 190 |
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| 191 | while (Count-- > 0) {
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| 192 | if ( *(UINT32*)Ptr == Signature
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| 193 | && ((EFI_ACPI_DESCRIPTION_HEADER *)Ptr)->Length <= Count
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| 194 | && (NoChecksum ||
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| 195 | CalculateCheckSum8(Ptr, ((EFI_ACPI_DESCRIPTION_HEADER *)Ptr)->Length) == 0
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| 196 | )) {
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| 197 | return Ptr;
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| 198 | }
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| 199 |
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| 200 | Ptr++;
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| 201 | }
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| 202 | return NULL;
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| 203 | }
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[90907] | 204 | #endif
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[58175] | 205 |
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| 206 | VOID
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| 207 | FillSysTablesInfo(VOID **Tables, UINT32 TablesSize)
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| 208 | {
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| 209 | UINT32 Table = 0;
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| 210 | EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *RsdPtr;
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[90907] | 211 | #ifndef ACPI_NO_STATIC_TABLES_SELECTION
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[58175] | 212 | VOID *TablesPage;
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[90907] | 213 | #else
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| 214 | EFI_ACPI_DESCRIPTION_HEADER *RsdtTbl;
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| 215 | #endif
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| 216 | UINT64 *PtrTbl;
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| 217 | UINT32 Index;
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| 218 |
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| 219 | RsdPtr = (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER*)FindAcpiRsdPtr();
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| 220 | ASSERT(RsdPtr != NULL);
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| 221 |
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| 222 | #ifndef ACPI_NO_STATIC_TABLES_SELECTION
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[58175] | 223 | #define FLAG_OPTIONAL 1<<0
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| 224 | #define FLAG_NO_CHECKSUM 1<<1
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| 225 | static struct {
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| 226 | UINT32 Signature;
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| 227 | UINT32 Flags;
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| 228 | CHAR8* Name;
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| 229 | } TableInfo[] = {
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| 230 | // MADT, optional
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| 231 | { SIGNATURE_32('A', 'P', 'I', 'C'), FLAG_OPTIONAL, "MADT"},
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| 232 | // FACP (also called FADT)
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| 233 | { SIGNATURE_32('F', 'A', 'C', 'P'), 0, "FADT"},
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| 234 | // FACS, according 5.2.9 of ACPI v2. spec FACS doesn't have checksum field
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| 235 | { SIGNATURE_32('F', 'A', 'C', 'S'), FLAG_NO_CHECKSUM, "FACS"},
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| 236 | // DSDT
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| 237 | { SIGNATURE_32('D', 'S', 'D', 'T'), 0, "DSDT"},
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| 238 | // SSDT
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| 239 | { SIGNATURE_32('S', 'S', 'D', 'T'), FLAG_OPTIONAL, "SSDT"},
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| 240 | // HPET
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| 241 | { SIGNATURE_32('H', 'P', 'E', 'T'), FLAG_OPTIONAL, "HPET"},
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| 242 | // MCFG
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| 243 | { SIGNATURE_32('M', 'C', 'F', 'G'), FLAG_OPTIONAL, "MCFG"}
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| 244 | };
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| 245 |
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[90907] | 246 | TablesPage = (VOID *)(UINTN)((RsdPtr->RsdtAddress) & ~0xfff);
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[58175] | 247 | DEBUG((DEBUG_INFO, "TablesPage:%p\n", TablesPage));
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| 248 |
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| 249 | for (Index = 0; Index < sizeof TableInfo / sizeof TableInfo[0]; Index++)
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| 250 | {
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| 251 | VOID *Ptr = FindSignature(TablesPage, TableInfo[Index].Signature,
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| 252 | (BOOLEAN)((TableInfo[Index].Flags & FLAG_NO_CHECKSUM) != 0));
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| 253 | if (TableInfo[Index].Signature == SIGNATURE_32('F', 'A', 'C', 'P'))
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| 254 | {
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| 255 | // we actually have 2 FADTs, see https://xtracker.innotek.de/index.php?bug=4082
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| 256 | Ptr = FindSignature((UINT8*)Ptr+32, SIGNATURE_32('F', 'A', 'C', 'P'), FALSE);
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| 257 | }
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| 258 | if (!(TableInfo[Index].Flags & FLAG_OPTIONAL))
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| 259 | {
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| 260 | if (!Ptr)
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| 261 | DEBUG((EFI_D_ERROR, "%a: isn't optional %p\n", TableInfo[Index].Name, Ptr));
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| 262 | ASSERT(Ptr != NULL);
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| 263 | }
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| 264 | DEBUG((EFI_D_ERROR, "%a: %p\n", TableInfo[Index].Name, Ptr));
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| 265 | if (Ptr)
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| 266 | Tables[Table++] = Ptr;
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| 267 | }
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[90907] | 268 | #else
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| 269 | RsdtTbl = (EFI_ACPI_DESCRIPTION_HEADER*)(UINTN)RsdPtr->XsdtAddress;
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| 270 | DEBUG((DEBUG_INFO, "RsdtTbl:%p\n", RsdtTbl));
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[58175] | 271 |
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[90907] | 272 | PtrTbl = (UINT64 *)(RsdtTbl + 1);
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| 273 | for (Index = 0; Index < (RsdtTbl->Length - sizeof(*RsdtTbl)) / sizeof(UINT64); Index++)
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| 274 | {
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| 275 | EFI_ACPI_DESCRIPTION_HEADER *Header = (EFI_ACPI_DESCRIPTION_HEADER *)(UINTN)*PtrTbl++;
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| 276 | DEBUG ((DEBUG_VERBOSE, "Table %p found \"%-4.4a\" size 0x%x\n", Header, (CONST CHAR8 *)&Header->Signature, Header->Length));
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| 277 |
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| 278 | if (Header->Signature == SIGNATURE_32('F', 'A', 'C', 'P'))
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| 279 | {
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| 280 | /* Add the DSDT pointer from there. */
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| 281 | EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *)Header;
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| 282 | DEBUG((DEBUG_INFO, "Found FACP: DSDT 0x%x FACS 0x%x XDsdt %p XFacs %p\n", Fadt->Dsdt, Fadt->FirmwareCtrl, Fadt->XDsdt, Fadt->XFirmwareCtrl));
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| 283 | Tables[Table++] = (VOID *)(UINTN)Fadt->FirmwareCtrl;
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| 284 | Tables[Table++] = (VOID *)(UINTN)Fadt->Dsdt;
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| 285 | }
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| 286 |
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| 287 | Tables[Table++] = Header;
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| 288 | }
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| 289 | #endif
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| 290 |
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[58175] | 291 | #if 0
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| 292 | // RSDT
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| 293 | ASSERT(Table < TablesSize);
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| 294 | Tables[Table] = FindSignature(TablesPage, SIGNATURE_32('R', 'S', 'D', 'T'));
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| 295 | DEBUG ((EFI_D_ERROR, "RSDT: %p\n", Tables[Table]));
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| 296 | ASSERT(Tables[Table] != NULL);
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| 297 | Table++;
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| 298 |
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| 299 | // XSDT
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| 300 | ASSERT(Table < TablesSize);
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| 301 | Tables[Table] = FindSignature(TablesPage, SIGNATURE_32('X', 'S', 'D', 'T'));
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| 302 | DEBUG ((EFI_D_ERROR, "XSDT: %p\n", Tables[Table]));
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| 303 | ASSERT(Tables[Table] != NULL);
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| 304 | Table++;
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| 305 | #endif
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| 306 |
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[90907] | 307 | DEBUG((DEBUG_INFO, "We found %d tables (max allowed %d)\n", Table, TablesSize));
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[58175] | 308 | Tables[Table] = NULL;
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| 309 | }
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| 310 |
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| 311 | #endif /* VBOX */
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| 312 |
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| 313 |
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[48674] | 314 | /**
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| 315 | Entrypoint of Acpi Platform driver.
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| 316 |
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| 317 | @param ImageHandle
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| 318 | @param SystemTable
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| 319 |
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| 320 | @return EFI_SUCCESS
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| 321 | @return EFI_LOAD_ERROR
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| 322 | @return EFI_OUT_OF_RESOURCES
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| 323 |
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| 324 | **/
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| 325 | EFI_STATUS
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| 326 | EFIAPI
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| 327 | AcpiPlatformEntryPoint (
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| 328 | IN EFI_HANDLE ImageHandle,
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| 329 | IN EFI_SYSTEM_TABLE *SystemTable
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| 330 | )
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| 331 | {
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| 332 | EFI_STATUS Status;
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| 333 | EFI_ACPI_TABLE_PROTOCOL *AcpiTable;
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[58175] | 334 | #ifdef VBOX
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[90907] | 335 | # ifndef ACPI_NO_STATIC_TABLES_SELECTION
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[58175] | 336 | VOID *VBoxTables[10];
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[90907] | 337 | # else
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| 338 | VOID *VBoxTables[128];
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| 339 | # endif
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[58175] | 340 | #else
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[48674] | 341 | EFI_FIRMWARE_VOLUME2_PROTOCOL *FwVol;
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[58175] | 342 | #endif
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[48674] | 343 | INTN Instance;
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| 344 | EFI_ACPI_COMMON_HEADER *CurrentTable;
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| 345 | UINTN TableHandle;
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[58175] | 346 | #ifndef VBOX
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[48674] | 347 | UINT32 FvStatus;
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[58175] | 348 | #endif
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[48674] | 349 | UINTN TableSize;
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| 350 | UINTN Size;
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| 351 |
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| 352 | Instance = 0;
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| 353 | CurrentTable = NULL;
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| 354 | TableHandle = 0;
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| 355 |
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| 356 | //
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| 357 | // Find the AcpiTable protocol
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| 358 | //
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| 359 | Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID**)&AcpiTable);
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| 360 | if (EFI_ERROR (Status)) {
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| 361 | return EFI_ABORTED;
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| 362 | }
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| 363 |
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[58175] | 364 | #ifdef VBOX
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[48674] | 365 | //
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[58175] | 366 | // VBOX already has tables prepared in memory - just reuse them.
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| 367 | //
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| 368 | FillSysTablesInfo(VBoxTables, sizeof(VBoxTables)/sizeof(VBoxTables[0]));
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| 369 | #else
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| 370 | //
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| 371 | //
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[48674] | 372 | // Locate the firmware volume protocol
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| 373 | //
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| 374 | Status = LocateFvInstanceWithTables (&FwVol);
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| 375 | if (EFI_ERROR (Status)) {
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| 376 | return EFI_ABORTED;
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| 377 | }
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[58175] | 378 | #endif
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[48674] | 379 | //
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| 380 | // Read tables from the storage file.
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| 381 | //
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| 382 | while (Status == EFI_SUCCESS) {
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| 383 |
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[58175] | 384 | #ifdef VBOX
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| 385 | CurrentTable = (EFI_ACPI_COMMON_HEADER *)VBoxTables[Instance];
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| 386 | Status = (CurrentTable == NULL) ? EFI_NOT_FOUND : EFI_SUCCESS;
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| 387 | if (CurrentTable) {
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| 388 | Size = CurrentTable->Length;
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| 389 | DEBUG((EFI_D_ERROR, "adding %p %d\n", CurrentTable, Size));
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[58975] | 390 | } else
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| 391 | Size = 0; // Just to shut up the compiler.
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[58175] | 392 | #else
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[48674] | 393 | Status = FwVol->ReadSection (
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| 394 | FwVol,
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| 395 | (EFI_GUID*)PcdGetPtr (PcdAcpiTableStorageFile),
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| 396 | EFI_SECTION_RAW,
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| 397 | Instance,
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| 398 | (VOID**) &CurrentTable,
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| 399 | &Size,
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| 400 | &FvStatus
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| 401 | );
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[58175] | 402 | #endif
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[48674] | 403 | if (!EFI_ERROR(Status)) {
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| 404 | //
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| 405 | // Add the table
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| 406 | //
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| 407 | TableHandle = 0;
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| 408 |
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| 409 | TableSize = ((EFI_ACPI_DESCRIPTION_HEADER *) CurrentTable)->Length;
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[58175] | 410 | #ifdef VBOX
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| 411 | DEBUG((DEBUG_INFO, "Size:%d, TableSize:%d\n", Size, TableSize));
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| 412 | #endif
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[48674] | 413 | ASSERT (Size >= TableSize);
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| 414 |
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| 415 | //
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| 416 | // Checksum ACPI table
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| 417 | //
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| 418 | AcpiPlatformChecksum ((UINT8*)CurrentTable, TableSize);
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| 419 |
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| 420 | //
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| 421 | // Install ACPI table
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| 422 | //
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| 423 | Status = AcpiTable->InstallAcpiTable (
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| 424 | AcpiTable,
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| 425 | CurrentTable,
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| 426 | TableSize,
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| 427 | &TableHandle
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| 428 | );
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| 429 |
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[58175] | 430 | #ifndef VBOX /* In case we're reading ACPI tables from memory we haven't
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| 431 | allocated this memory, so it isn't required to free it */
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[48674] | 432 | //
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| 433 | // Free memory allocated by ReadSection
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| 434 | //
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| 435 | gBS->FreePool (CurrentTable);
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| 436 |
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| 437 | if (EFI_ERROR(Status)) {
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| 438 | return EFI_ABORTED;
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| 439 | }
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[58175] | 440 | #endif
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[48674] | 441 |
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| 442 | //
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| 443 | // Increment the instance
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| 444 | //
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| 445 | Instance++;
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| 446 | CurrentTable = NULL;
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| 447 | }
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| 448 | }
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| 449 |
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[80721] | 450 | //
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| 451 | // The driver does not require to be kept loaded.
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| 452 | //
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| 453 | return EFI_REQUEST_UNLOAD_IMAGE;
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[48674] | 454 | }
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| 455 |
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