/** @file
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*
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* Copyright (c) 2011-2014, ARM Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-2-Clause-Patent
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*
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**/
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#include <PiPei.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/HobLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/PcdLib.h>
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#include <Library/PeiServicesLib.h>
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#include <Platform/DramInfo.h>
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#include <Ppi/DramInfo.h>
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#include <Ppi/EmbeddedGpio.h>
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#include <Ppi/MemoryDiscovered.h>
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#define GPIO_NOT_IMPLEMENTED MAX_UINT8
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#define CLEAR_SETTINGS_GPIO_ASSERTED 1
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#define PCIE_GPIO_CARD_PRESENT 0
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STATIC
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CONST DRAM_INFO *mDramInfo = (VOID *)(UINTN)FixedPcdGet64 (PcdDramInfoBase);
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/**
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Retrieve the number of discontiguous DRAM regions
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@param[out] RegionCount The number of available DRAM regions
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@retval EFI_SUCCESS The data was successfully returned.
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@retval EFI_INVALID_PARAMETER RegionCount == NULL
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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GetDramRegionCount (
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OUT UINTN *RegionCount
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)
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{
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if (RegionCount == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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*RegionCount = mDramInfo->NumRegions;
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return EFI_SUCCESS;
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}
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/**
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Retrieve the base and size of a DRAM region
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@param[in] RegionIndex The 0-based index of the region to retrieve
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@param[out] Base The base of the requested region
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@param[out] Size The size of the requested region
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@retval EFI_SUCCESS The data was successfully returned.
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@retval EFI_INVALID_PARAMETER Base == NULL or Size == NULL
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@retval EFI_NOT_FOUND No region exists with index >= RegionIndex
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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GetDramRegion (
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IN UINTN RegionIndex,
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OUT UINT64 *Base,
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OUT UINT64 *Size
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)
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{
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if (Base == NULL || Size == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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if (RegionIndex >= mDramInfo->NumRegions) {
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return EFI_NOT_FOUND;
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}
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*Base = mDramInfo->Entry[RegionIndex].Base;
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*Size = mDramInfo->Entry[RegionIndex].Size;
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return EFI_SUCCESS;
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}
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STATIC SYNQUACER_DRAM_INFO_PPI mDramInfoPpi = {
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GetDramRegionCount,
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GetDramRegion
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};
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STATIC CONST EFI_PEI_PPI_DESCRIPTOR mDramInfoPpiDescriptor = {
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EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
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&gSynQuacerDramInfoPpiGuid,
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&mDramInfoPpi
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};
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STATIC
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EFI_STATUS
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ReadGpioInput (
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IN EMBEDDED_GPIO_PPI *Gpio,
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IN UINT8 Pin,
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OUT UINTN *Value
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)
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{
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EFI_STATUS Status;
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if (Pin == GPIO_NOT_IMPLEMENTED) {
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return EFI_NOT_FOUND;
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}
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Status = Gpio->Set (Gpio, Pin, GPIO_MODE_INPUT);
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if (EFI_ERROR (Status)) {
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DEBUG ((DEBUG_WARN, "%a: failed to set GPIO %d as input - %r\n",
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__FUNCTION__, Pin, Status));
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return Status;
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}
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Status = Gpio->Get (Gpio, Pin, Value);
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if (EFI_ERROR (Status)) {
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DEBUG ((DEBUG_WARN, "%a: failed to get GPIO %d state - %r\n",
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__FUNCTION__, Pin, Status));
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}
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return Status;
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}
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EFI_STATUS
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EFIAPI
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PlatformPeim (
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VOID
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)
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{
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EMBEDDED_GPIO_PPI *Gpio;
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EFI_STATUS Status;
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UINTN Value;
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ASSERT (mDramInfo->NumRegions > 0);
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Status = PeiServicesLocatePpi (&gEdkiiEmbeddedGpioPpiGuid, 0, NULL,
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(VOID **)&Gpio);
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ASSERT_EFI_ERROR (Status);
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Status = ReadGpioInput (Gpio, FixedPcdGet8 (PcdClearSettingsGpioPin), &Value);
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if (!EFI_ERROR (Status) && Value == CLEAR_SETTINGS_GPIO_ASSERTED) {
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DEBUG ((DEBUG_INFO, "%a: clearing NVRAM\n", __FUNCTION__));
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PeiServicesSetBootMode (BOOT_WITH_DEFAULT_SETTINGS);
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}
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Status = ReadGpioInput (Gpio, FixedPcdGet8 (PcdPcie0PresenceDetectGpioPin),
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&Value);
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if (!EFI_ERROR (Status) && Value == PCIE_GPIO_CARD_PRESENT) {
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DEBUG ((DEBUG_INFO,
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"%a: card detected in PCIe RC #0, enabling\n", __FUNCTION__));
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Status = PcdSet8S (PcdPcieEnableMask, PcdGet8 (PcdPcieEnableMask) | BIT0);
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ASSERT_EFI_ERROR (Status);
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}
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//
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// Record the first region into PcdSystemMemoryBase and PcdSystemMemorySize.
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// This is the region we will use for UEFI itself.
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//
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Status = PcdSet64S (PcdSystemMemoryBase, mDramInfo->Entry[0].Base);
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ASSERT_EFI_ERROR (Status);
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Status = PcdSet64S (PcdSystemMemorySize, mDramInfo->Entry[0].Size);
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ASSERT_EFI_ERROR (Status);
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BuildFvHob (FixedPcdGet64 (PcdFvBaseAddress), FixedPcdGet32 (PcdFvSize));
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return PeiServicesInstallPpi (&mDramInfoPpiDescriptor);
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}
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