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audk/CorebootModulePkg/Library/CbParseLib/CbParseLib.c

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/** @file
This library will parse the coreboot table in memory and extract those required
information.
Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <Uefi/UefiBaseType.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <Library/CbParseLib.h>
#include <IndustryStandard/Acpi.h>
#include "Coreboot.h"
/* Helpful inlines */
static UINT64 cb_unpack64(struct cbuint64 val)
{
return LShiftU64 (val.hi, 32) | val.lo;
}
UINT16
CbCheckSum16 (
IN UINT16 *Buffer,
IN UINTN Length
)
{
UINT32 Sum, TmpValue;
UINTN Idx;
UINT8 *TmpPtr;
Sum = 0;
TmpPtr = (UINT8 *)Buffer;
for(Idx = 0; Idx < Length; Idx++) {
TmpValue = TmpPtr[Idx];
if (Idx % 2 == 1) {
TmpValue <<= 8;
}
Sum += TmpValue;
// Wrap
if (Sum >= 0x10000) {
Sum = (Sum + (Sum >> 16)) & 0xFFFF;
}
}
return (UINT16)((~Sum) & 0xFFFF);
}
VOID *
FindCbTag (
IN VOID *Start,
IN UINT32 Tag
)
{
struct cb_header *Header;
struct cb_record *Record;
UINT8 *TmpPtr;
UINT8 *TagPtr;
UINTN Idx;
UINT16 CheckSum;
Header = NULL;
TmpPtr = (UINT8 *)Start;
for (Idx = 0; Idx < 4096; Idx += 16, TmpPtr += 16) {
Header = (struct cb_header *)TmpPtr;
if (Header->signature == CB_HEADER_SIGNATURE) {
break;
}
}
if (Idx >= 4096)
return NULL;
if (Header == NULL || !Header->table_bytes)
return NULL;
//
// Check the checksum of the coreboot table header
//
CheckSum = CbCheckSum16 ((UINT16 *)Header, sizeof (*Header));
if (CheckSum != 0) {
DEBUG ((EFI_D_ERROR, "Invalid coreboot table header checksum\n"));
return NULL;
}
CheckSum = CbCheckSum16 ((UINT16 *)(TmpPtr + sizeof (*Header)), Header->table_bytes);
if (CheckSum != Header->table_checksum) {
DEBUG ((EFI_D_ERROR, "Incorrect checksum of all the coreboot table entries\n"));
return NULL;
}
TagPtr = NULL;
TmpPtr += Header->header_bytes;
for (Idx = 0; Idx < Header->table_entries; Idx++) {
Record = (struct cb_record *)TmpPtr;
if (Record->tag == CB_TAG_FORWARD) {
TmpPtr = (VOID *)(UINTN)((struct cb_forward *)(UINTN)Record)->forward;
if (Tag == CB_TAG_FORWARD)
return TmpPtr;
else
return FindCbTag (TmpPtr, Tag);
}
if (Record->tag == Tag) {
TagPtr = TmpPtr;
break;
}
TmpPtr += Record->size;
}
return TagPtr;
}
RETURN_STATUS
FindCbMemTable (
struct cbmem_root *root,
IN UINT32 TableId,
IN VOID** pMemTable,
IN UINT32* pMemTableSize
)
{
UINTN Idx;
if ((!root) || (!pMemTable))
return RETURN_INVALID_PARAMETER;
for (Idx = 0; Idx < root->num_entries; Idx++) {
if (root->entries[Idx].id == TableId) {
*pMemTable = (VOID *) (UINTN)root->entries[Idx].start;
if (pMemTableSize)
*pMemTableSize = root->entries[Idx].size;
DEBUG ((EFI_D_ERROR, "Find CbMemTable Id 0x%x, base %p, size 0x%x\n", TableId, *pMemTable, *pMemTableSize));
return RETURN_SUCCESS;
}
}
return RETURN_NOT_FOUND;
}
/**
Acquire the memory information from the coreboot table in memory.
@param pLowMemorySize Pointer to the variable of low memory size
@param pHighMemorySize Pointer to the variable of high memory size
@retval RETURN_SUCCESS Successfully find out the memory information.
@retval RETURN_INVALID_PARAMETER Invalid input parameters.
@retval RETURN_NOT_FOUND Failed to find the memory information.
**/
RETURN_STATUS
CbParseMemoryInfo (
IN UINT64* pLowMemorySize,
IN UINT64* pHighMemorySize
)
{
struct cb_memory* rec;
struct cb_memory_range* Range;
UINT64 Start;
UINT64 Size;
UINTN Index;
if ((!pLowMemorySize) || (!pHighMemorySize))
return RETURN_INVALID_PARAMETER;
//
// Get the coreboot memory table
//
rec = (struct cb_memory *)FindCbTag (0, CB_TAG_MEMORY);
if (!rec)
rec = (struct cb_memory *)FindCbTag ((VOID *)(UINTN)PcdGet32 (PcdCbHeaderPointer), CB_TAG_MEMORY);
if (!rec)
return RETURN_NOT_FOUND;
*pLowMemorySize = 0;
*pHighMemorySize = 0;
for (Index = 0; Index < MEM_RANGE_COUNT(rec); Index++) {
Range = MEM_RANGE_PTR(rec, Index);
Start = cb_unpack64(Range->start);
Size = cb_unpack64(Range->size);
DEBUG ((EFI_D_ERROR, "%d. %016lx - %016lx [%02x]\n",
Index, Start, Start + Size - 1, Range->type));
if (Range->type != CB_MEM_RAM) {
continue;
}
if (Start + Size < 0x100000000ULL) {
*pLowMemorySize = Start + Size;
} else {
*pHighMemorySize = Start + Size - 0x100000000ULL;
}
}
DEBUG ((EFI_D_ERROR, "Low memory 0x%lx, High Memory 0x%lx\n", *pLowMemorySize, *pHighMemorySize));
return RETURN_SUCCESS;
}
/**
Acquire the coreboot memory table with the given table id
@param TableId Table id to be searched
@param pMemTable Pointer to the base address of the memory table
@param pMemTableSize Pointer to the size of the memory table
@retval RETURN_SUCCESS Successfully find out the memory table.
@retval RETURN_INVALID_PARAMETER Invalid input parameters.
@retval RETURN_NOT_FOUND Failed to find the memory table.
**/
RETURN_STATUS
CbParseCbMemTable (
IN UINT32 TableId,
IN VOID** pMemTable,
IN UINT32* pMemTableSize
)
{
struct cb_memory* rec;
struct cb_memory_range* Range;
UINT64 Start;
UINT64 Size;
UINTN Index;
if (!pMemTable)
return RETURN_INVALID_PARAMETER;
*pMemTable = NULL;
//
// Get the coreboot memory table
//
rec = (struct cb_memory *)FindCbTag (0, CB_TAG_MEMORY);
if (!rec)
rec = (struct cb_memory *)FindCbTag ((VOID *)(UINTN)PcdGet32 (PcdCbHeaderPointer), CB_TAG_MEMORY);
if (!rec)
return RETURN_NOT_FOUND;
for (Index = 0; Index < MEM_RANGE_COUNT(rec); Index++) {
Range = MEM_RANGE_PTR(rec, Index);
Start = cb_unpack64(Range->start);
Size = cb_unpack64(Range->size);
if ((Range->type == CB_MEM_TABLE) && (Start > 0x1000)) {
if (FindCbMemTable ((struct cbmem_root *)(UINTN)(Start + Size - DYN_CBMEM_ALIGN_SIZE), TableId, pMemTable, pMemTableSize) == RETURN_SUCCESS)
return RETURN_SUCCESS;
}
}
return RETURN_NOT_FOUND;
}
/**
Acquire the acpi table from coreboot
@param pMemTable Pointer to the base address of the memory table
@param pMemTableSize Pointer to the size of the memory table
@retval RETURN_SUCCESS Successfully find out the memory table.
@retval RETURN_INVALID_PARAMETER Invalid input parameters.
@retval RETURN_NOT_FOUND Failed to find the memory table.
**/
RETURN_STATUS
CbParseAcpiTable (
IN VOID* pMemTable,
IN UINT32* pMemTableSize
)
{
return CbParseCbMemTable (SIGNATURE_32 ('I', 'P', 'C', 'A'), (VOID **)pMemTable, pMemTableSize);
}
/**
Acquire the smbios table from coreboot
@param pMemTable Pointer to the base address of the memory table
@param pMemTableSize Pointer to the size of the memory table
@retval RETURN_SUCCESS Successfully find out the memory table.
@retval RETURN_INVALID_PARAMETER Invalid input parameters.
@retval RETURN_NOT_FOUND Failed to find the memory table.
**/
RETURN_STATUS
CbParseSmbiosTable (
IN VOID** pMemTable,
IN UINT32* pMemTableSize
)
{
return CbParseCbMemTable (SIGNATURE_32 ('T', 'B', 'M', 'S'), pMemTable, pMemTableSize);
}
/**
Find the required fadt information
@param pPmCtrlReg Pointer to the address of power management control register
@param pPmTimerReg Pointer to the address of power management timer register
@param pResetReg Pointer to the address of system reset register
@param pResetValue Pointer to the value to be writen to the system reset register
@retval RETURN_SUCCESS Successfully find out all the required fadt information.
@retval RETURN_NOT_FOUND Failed to find the fadt table.
**/
RETURN_STATUS
CbParseFadtInfo (
IN UINTN* pPmCtrlReg,
IN UINTN* pPmTimerReg,
IN UINTN* pResetReg,
IN UINTN* pResetValue
)
{
EFI_ACPI_3_0_ROOT_SYSTEM_DESCRIPTION_POINTER* Rsdp;
EFI_ACPI_DESCRIPTION_HEADER* Rsdt;
UINT32* Entry32;
UINTN Entry32Num;
EFI_ACPI_3_0_FIXED_ACPI_DESCRIPTION_TABLE* Fadt;
EFI_ACPI_DESCRIPTION_HEADER* Xsdt;
UINT64* Entry64;
UINTN Entry64Num;
UINTN Idx;
RETURN_STATUS Status;
Rsdp = NULL;
Status = RETURN_SUCCESS;
Status = CbParseAcpiTable (&Rsdp, NULL);
if (RETURN_ERROR(Status))
return Status;
if (!Rsdp)
return RETURN_NOT_FOUND;
DEBUG ((EFI_D_ERROR, "Find Rsdp at %p\n", Rsdp));
DEBUG ((EFI_D_ERROR, "Find Rsdt 0x%x, Xsdt 0x%lx\n", Rsdp->RsdtAddress, Rsdp->XsdtAddress));
//
// Search Rsdt First
//
Rsdt = (EFI_ACPI_DESCRIPTION_HEADER *)(UINTN)(Rsdp->RsdtAddress);
if (Rsdt != NULL) {
Entry32 = (UINT32 *)(Rsdt + 1);
Entry32Num = (Rsdt->Length - sizeof(EFI_ACPI_DESCRIPTION_HEADER)) >> 2;
for (Idx = 0; Idx < Entry32Num; Idx++) {
if (*(UINT32 *)(UINTN)(Entry32[Idx]) == EFI_ACPI_3_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE) {
Fadt = (EFI_ACPI_3_0_FIXED_ACPI_DESCRIPTION_TABLE *)(UINTN)(Entry32[Idx]);
if (pPmCtrlReg)
*pPmCtrlReg = Fadt->Pm1aCntBlk;
DEBUG ((EFI_D_ERROR, "PmCtrl Reg 0x%x\n", Fadt->Pm1aCntBlk));
if (pPmTimerReg)
*pPmTimerReg = Fadt->PmTmrBlk;
DEBUG ((EFI_D_ERROR, "PmTimer Reg 0x%x\n", Fadt->PmTmrBlk));
if (pResetReg)
*pResetReg = (UINTN)Fadt->ResetReg.Address;
DEBUG ((EFI_D_ERROR, "Reset Reg 0x%lx\n", Fadt->ResetReg.Address));
if (pResetValue)
*pResetValue = Fadt->ResetValue;
DEBUG ((EFI_D_ERROR, "Reset Value 0x%x\n", Fadt->ResetValue));
return RETURN_SUCCESS;
}
}
}
//
// Search Xsdt Second
//
Xsdt = (EFI_ACPI_DESCRIPTION_HEADER *)(UINTN)(Rsdp->XsdtAddress);
if (Xsdt != NULL) {
Entry64 = (UINT64 *)(Xsdt + 1);
Entry64Num = (Xsdt->Length - sizeof(EFI_ACPI_DESCRIPTION_HEADER)) >> 3;
for (Idx = 0; Idx < Entry64Num; Idx++) {
if (*(UINT32 *)(UINTN)(Entry64[Idx]) == EFI_ACPI_3_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE) {
Fadt = (EFI_ACPI_3_0_FIXED_ACPI_DESCRIPTION_TABLE *)(UINTN)(Entry64[Idx]);
if (pPmCtrlReg)
*pPmCtrlReg = Fadt->Pm1aCntBlk;
DEBUG ((EFI_D_ERROR, "PmCtrl Reg 0x%x\n", Fadt->Pm1aCntBlk));
if (pPmTimerReg)
*pPmTimerReg = Fadt->PmTmrBlk;
DEBUG ((EFI_D_ERROR, "PmTimer Reg 0x%x\n", Fadt->PmTmrBlk));
if (pResetReg)
*pResetReg = (UINTN)Fadt->ResetReg.Address;
DEBUG ((EFI_D_ERROR, "Reset Reg 0x%lx\n", Fadt->ResetReg.Address));
if (pResetValue)
*pResetValue = Fadt->ResetValue;
DEBUG ((EFI_D_ERROR, "Reset Value 0x%x\n", Fadt->ResetValue));
return RETURN_SUCCESS;
}
}
}
return RETURN_NOT_FOUND;
}
/**
Find the serial port information
@param pRegBase Pointer to the base address of serial port registers
@param pRegAccessType Pointer to the access type of serial port registers
@param pBaudrate Pointer to the serial port baudrate
@retval RETURN_SUCCESS Successfully find the serial port information.
@retval RETURN_NOT_FOUND Failed to find the serial port information .
**/
RETURN_STATUS
CbParseSerialInfo (
IN UINT32* pRegBase,
IN UINT32* pRegAccessType,
IN UINT32* pBaudrate
)
{
struct cb_serial* CbSerial;
CbSerial = FindCbTag (0, CB_TAG_SERIAL);
if (!CbSerial)
CbSerial = FindCbTag ((VOID *)(UINTN)PcdGet32 (PcdCbHeaderPointer), CB_TAG_SERIAL);
if (!CbSerial)
return RETURN_NOT_FOUND;
if (pRegBase)
*pRegBase = CbSerial->baseaddr;
if (pRegAccessType)
*pRegAccessType = CbSerial->type;
if (pBaudrate)
*pBaudrate = CbSerial->baud;
return RETURN_SUCCESS;
}
/**
Search for the coreboot table header
@param Level Level of the search depth
@param HeaderPtr Pointer to the pointer of coreboot table header
@retval RETURN_SUCCESS Successfully find the coreboot table header .
@retval RETURN_NOT_FOUND Failed to find the coreboot table header .
**/
RETURN_STATUS
CbParseGetCbHeader (
IN UINTN Level,
IN VOID** HeaderPtr
)
{
UINTN Index;
VOID* TempPtr;
if (!HeaderPtr)
return RETURN_NOT_FOUND;
TempPtr = NULL;
for (Index = 0; Index < Level; Index++) {
TempPtr = FindCbTag (TempPtr, CB_TAG_FORWARD);
if (!TempPtr)
break;
}
if ((Index >= Level) && (TempPtr != NULL)) {
*HeaderPtr = TempPtr;
return RETURN_SUCCESS;
}
return RETURN_NOT_FOUND;
}
/**
Find the video frame buffer information
@param pFbInfo Pointer to the FRAME_BUFFER_INFO structure
@retval RETURN_SUCCESS Successfully find the video frame buffer information.
@retval RETURN_NOT_FOUND Failed to find the video frame buffer information .
**/
RETURN_STATUS
CbParseFbInfo (
IN FRAME_BUFFER_INFO* pFbInfo
)
{
struct cb_framebuffer* CbFbRec;
if (!pFbInfo)
return RETURN_INVALID_PARAMETER;
CbFbRec = FindCbTag (0, CB_TAG_FRAMEBUFFER);
if (!CbFbRec)
CbFbRec = FindCbTag ((VOID *)(UINTN)PcdGet32 (PcdCbHeaderPointer), CB_TAG_FRAMEBUFFER);
if (!CbFbRec)
return RETURN_NOT_FOUND;
DEBUG ((EFI_D_ERROR, "Found coreboot video frame buffer information\n"));
DEBUG ((EFI_D_ERROR, "physical_address: 0x%lx\n", CbFbRec->physical_address));
DEBUG ((EFI_D_ERROR, "x_resolution: 0x%x\n", CbFbRec->x_resolution));
DEBUG ((EFI_D_ERROR, "y_resolution: 0x%x\n", CbFbRec->y_resolution));
DEBUG ((EFI_D_ERROR, "bits_per_pixel: 0x%x\n", CbFbRec->bits_per_pixel));
DEBUG ((EFI_D_ERROR, "bytes_per_line: 0x%x\n", CbFbRec->bytes_per_line));
DEBUG ((EFI_D_ERROR, "red_mask_size: 0x%x\n", CbFbRec->red_mask_size));
DEBUG ((EFI_D_ERROR, "red_mask_pos: 0x%x\n", CbFbRec->red_mask_pos));
DEBUG ((EFI_D_ERROR, "green_mask_size: 0x%x\n", CbFbRec->green_mask_size));
DEBUG ((EFI_D_ERROR, "green_mask_pos: 0x%x\n", CbFbRec->green_mask_pos));
DEBUG ((EFI_D_ERROR, "blue_mask_size: 0x%x\n", CbFbRec->blue_mask_size));
DEBUG ((EFI_D_ERROR, "blue_mask_pos: 0x%x\n", CbFbRec->blue_mask_pos));
DEBUG ((EFI_D_ERROR, "reserved_mask_size: 0x%x\n", CbFbRec->reserved_mask_size));
DEBUG ((EFI_D_ERROR, "reserved_mask_pos: 0x%x\n", CbFbRec->reserved_mask_pos));
pFbInfo->LinearFrameBuffer = CbFbRec->physical_address;
pFbInfo->HorizontalResolution = CbFbRec->x_resolution;
pFbInfo->VerticalResolution = CbFbRec->y_resolution;
pFbInfo->BitsPerPixel = CbFbRec->bits_per_pixel;
pFbInfo->BytesPerScanLine = (UINT16)CbFbRec->bytes_per_line;
pFbInfo->Red.Mask = (1 << CbFbRec->red_mask_size) - 1;
pFbInfo->Red.Position = CbFbRec->red_mask_pos;
pFbInfo->Green.Mask = (1 << CbFbRec->green_mask_size) - 1;
pFbInfo->Green.Position = CbFbRec->green_mask_pos;
pFbInfo->Blue.Mask = (1 << CbFbRec->blue_mask_size) - 1;
pFbInfo->Blue.Position = CbFbRec->blue_mask_pos;
pFbInfo->Reserved.Mask = (1 << CbFbRec->reserved_mask_size) - 1;
pFbInfo->Reserved.Position = CbFbRec->reserved_mask_pos;
return RETURN_SUCCESS;
}
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