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7fdb360046
As per specification we are going to accept only one argument at the entry point which is FDT pointer. Grab that and call the entry point. Signed-off-by: Dhaval Sharma <dhaval@rivosinc.com>
75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
/** @file
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RISC-V specific functionality for DxeLoad.
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Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
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Copyright (c) 2023, Rivos Inc
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiPei.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/PcdLib.h>
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#include <Library/HobLib.h>
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#include "UefiPayloadEntry.h"
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#define STACK_SIZE 0x20000
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/**
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Transfers control to DxeCore.
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This function performs a CPU architecture specific operations to execute
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the entry point of DxeCore with the parameters of HobList.
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It also installs EFI_END_OF_PEI_PPI to signal the end of PEI phase.
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@param DxeCoreEntryPoint The entry point of DxeCore.
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@param HobList The start of HobList passed to DxeCore.
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**/
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VOID
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HandOffToDxeCore (
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IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,
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IN EFI_PEI_HOB_POINTERS HobList
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)
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{
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VOID *BaseOfStack;
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VOID *TopOfStack;
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//
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//
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// Allocate 128KB for the Stack
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//
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BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE));
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if (BaseOfStack == NULL) {
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DEBUG ((DEBUG_ERROR, "%a: Can't allocate memory for stack.", __func__));
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ASSERT (FALSE);
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}
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//
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// Compute the top of the stack we were allocated. Pre-allocate a UINTN
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// for safety.
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//
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TopOfStack = (VOID *)((UINTN)BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT);
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TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
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//
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// Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.
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//
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UpdateStackHob ((EFI_PHYSICAL_ADDRESS)(UINTN)BaseOfStack, STACK_SIZE);
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DEBUG ((DEBUG_INFO, "DXE Core new stack at %x, stack pointer at %x\n", BaseOfStack, TopOfStack));
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//
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// Transfer the control to the entry point of DxeCore.
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//
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SwitchStack (
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(SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,
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HobList.Raw,
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NULL,
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TopOfStack
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);
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}
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