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Maurice Ma
0e1098d7b2
This patch added DMA memory type into memory allocation pool for payloads. This DMA memory buffer with PcdDmaBufferSize is located at address aligned at PcdDmaBufferAlignment after Payload reserved memory. Memory type EfiRuntimeServicesData is used to indicate DMA memory type. Stage1B calculates the DMA memory location using fixed PCDs so that platform can set up DMA protection as early as possible after memory is ready. In Stage1B or Stage2 platform code should use platform VTd information to setup PMR to protect all low memory except for the DMA buffer range. DMA memory will be added into memory pool at the entry point of the payload. Before transfering to OS, the DMA memory protection can be disabled, and the DMA memory pool can be reclaimed for OS usage. Currently only boot media device will utilize the DMA buffer range for block access operations. So it should only be required by payloads. GFX, when enabled, will also use DMA. It will be targeted to the system stolen memory which is not protected by PMR. Signed-off-by: Maurice Ma <maurice.ma@intel.com>
333 lines
9.3 KiB
C
333 lines
9.3 KiB
C
/** @file
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Support routines for memory allocation routines
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based on PeiService for PEI phase drivers.
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Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
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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/MemoryAllocationLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/BootloaderCoreLib.h>
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#define POOL_MIN_ALIGNMENT 0x10
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/**
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Update the Memory pool top address.
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@param [in] Top Top address to update.
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**/
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VOID
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InternalUpdateMemPoolTop (
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IN UINT32 Top
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)
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{
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LOADER_GLOBAL_DATA *LdrGlobal;
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LdrGlobal = GetLoaderGlobalDataPointer();
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ASSERT (Top >= LdrGlobal->MemPoolCurrBottom);
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LdrGlobal->MemPoolCurrTop = Top;
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}
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/**
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Update the Memory pool bottom address.
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@param [in] Bottom bottom address to update.
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**/
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VOID
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InternalUpdateMemPoolBottom (
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IN UINT32 Bottom
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)
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{
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LOADER_GLOBAL_DATA *LdrGlobal;
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LdrGlobal = GetLoaderGlobalDataPointer();
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ASSERT (LdrGlobal->MemPoolCurrTop >= Bottom);
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LdrGlobal->MemPoolCurrBottom = Bottom;
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}
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/**
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Allocates a buffer of type EfiBootServicesData.
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Allocates the number bytes specified by AllocationSize of type EfiBootServicesData and returns a
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pointer to the allocated buffer. If AllocationSize is 0, LdrGlobal->MemPoolCurrTop is returned.
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If there is not enough memory remaining to satisfy the request, InternalUpdateMemPoolTop ASSERTS
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and the function does not return.
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@param AllocationSize The number of bytes to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocatePool (
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IN UINTN AllocationSize
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)
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{
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LOADER_GLOBAL_DATA *LdrGlobal;
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UINT32 Top;
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LdrGlobal = GetLoaderGlobalDataPointer();
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Top = LdrGlobal->MemPoolCurrTop;
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Top -= AllocationSize;
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Top = ALIGN_DOWN (Top, POOL_MIN_ALIGNMENT);
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InternalUpdateMemPoolTop (Top);
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return (VOID *)Top;
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}
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/**
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Allocates and zeros a buffer of type EfiBootServicesData.
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Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, clears the
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buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0,
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LdrGlobal->MemPoolCurrTop is returned. If there is not enough memory remaining to satisfy the
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request, InternalUpdateMemPoolTop ASSERTS and the function does not return.
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@param AllocationSize The number of bytes to allocate and zero.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateZeroPool (
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IN UINTN AllocationSize
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)
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{
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VOID *Memory;
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Memory = AllocatePool (AllocationSize);
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if (Memory != NULL) {
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Memory = ZeroMem (Memory, AllocationSize);
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}
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return Memory;
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}
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/**
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Allocates one or more 4KB pages of type EfiBootServicesData.
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Allocates the number of 4KB pages of type EfiBootServicesData and returns a pointer to the
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allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then
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NULL is returned. If there is not enough memory remaining to satisfy the request,
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InternalUpdateMemPoolTop ASSERTS and the function does not return.
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@param Pages The number of 4 KB pages to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocatePages (
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IN UINTN Pages
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)
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{
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LOADER_GLOBAL_DATA *LdrGlobal;
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UINT32 Top;
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if (Pages == 0) {
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return NULL;
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}
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LdrGlobal = GetLoaderGlobalDataPointer();
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Top = LdrGlobal->MemPoolCurrTop;
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Top = ALIGN_DOWN (Top, EFI_PAGE_SIZE);
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Top -= Pages * EFI_PAGE_SIZE;
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InternalUpdateMemPoolTop (Top);
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return (VOID *)Top;
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}
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/**
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Allocates one or more 4KB pages of type EfiBootServicesData at a specified alignment.
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Allocates the number of 4KB pages specified by Pages of type EfiBootServicesData with an
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alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then
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NULL is returned. If there is not enough memory remaining to satisfy the request,
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InternalUpdateMemPoolTop ASSERTS and the function does not return.
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If Alignment is not a power of two and Alignment is not zero, then ASSERT().
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If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().
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@param Pages The number of 4 KB pages to allocate.
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@param Alignment The requested alignment of the allocation. Must be a power of two.
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If Alignment is zero, then byte alignment is used.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateAlignedPages (
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IN UINTN Pages,
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IN UINTN Alignment
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)
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{
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LOADER_GLOBAL_DATA *LdrGlobal;
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UINT32 Top;
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if (Pages == 0) {
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return NULL;
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}
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LdrGlobal = GetLoaderGlobalDataPointer();
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Top = LdrGlobal->MemPoolCurrTop;
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Top = ALIGN_DOWN (Top, EFI_PAGE_SIZE);
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Top -= Pages * EFI_PAGE_SIZE;
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if (Alignment > EFI_PAGE_SIZE) {
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Top = ALIGN_DOWN (Top, Alignment);
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}
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Top = ALIGN_DOWN (Top, EFI_PAGE_SIZE);
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InternalUpdateMemPoolTop (Top);
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return (VOID *)Top;
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}
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/**
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This function allocates temporary memory pool.
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@param[in] AllocationSize The memory pool size to allocate. If AllocationSize is 0,
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LdrGlobal->MemPoolCurrBottom is returned. If there is not enough memory remaining to satisfy the
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request, InternalUpdateMemPoolBottom ASSERTS and the function does not return.
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@retval A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateTemporaryMemory (
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IN UINTN AllocationSize
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)
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{
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LOADER_GLOBAL_DATA *LdrGlobal;
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UINT32 Bottom;
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UINT32 NewBottom;
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LdrGlobal = GetLoaderGlobalDataPointer();
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Bottom = LdrGlobal->MemPoolCurrBottom;
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Bottom = ALIGN_UP (Bottom, POOL_MIN_ALIGNMENT);
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NewBottom = Bottom + AllocationSize;
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InternalUpdateMemPoolBottom (NewBottom);
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return (VOID *)Bottom;
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}
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/**
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This function frees temporary memory pool.
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@param[in] Buffer Temporary memory pool to free.
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NULL indicates to free all temporary memory pool previously allocated
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**/
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VOID
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EFIAPI
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FreeTemporaryMemory (
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IN VOID *Buffer
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)
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{
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LOADER_GLOBAL_DATA *LdrGlobal;
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UINT32 NewBottom;
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LdrGlobal = GetLoaderGlobalDataPointer();
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if (Buffer == NULL) {
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LdrGlobal->MemPoolCurrBottom = LdrGlobal->MemPoolStart;
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} else {
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NewBottom = (UINT32)Buffer;
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if (NewBottom < LdrGlobal->MemPoolCurrBottom) {
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InternalUpdateMemPoolBottom (NewBottom);
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}
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}
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}
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/**
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Frees one or more 4KB pages that were previously allocated with one of the page allocation
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functions in the Memory Allocation Library.
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Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. Buffer
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must have been allocated on a previous call to the page allocation services of the Memory
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Allocation Library. If it is not possible to free allocated pages, then this function will
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perform no actions.
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If Buffer was not allocated with a page allocation function in the Memory Allocation Library,
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then ASSERT().
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If Pages is zero, then ASSERT().
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@param Buffer The pointer to the buffer of pages to free.
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@param Pages The number of 4 KB pages to free.
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**/
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VOID
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EFIAPI
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FreePages (
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IN VOID *Buffer,
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IN UINTN Pages
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)
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{
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}
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/**
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Frees a buffer that was previously allocated with one of the pool allocation functions in the
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Memory Allocation Library.
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Frees the buffer specified by Buffer. Buffer must have been allocated on a previous call to the
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pool allocation services of the Memory Allocation Library. If it is not possible to free pool
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resources, then this function will perform no actions.
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If Buffer was not allocated with a pool allocation function in the Memory Allocation Library,
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then ASSERT().
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@param Buffer The pointer to the buffer to free.
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**/
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VOID
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EFIAPI
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FreePool (
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IN VOID *Buffer
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)
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{
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}
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/**
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Allocates one or more 4KB pages of type EfiRuntimeServicesData.
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Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a pointer to the
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allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL
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is returned. If there is not enough memory remaining to satisfy the request, then NULL is
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returned.
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@param Pages The number of 4 KB pages to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateRuntimePages (
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IN UINTN Pages
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)
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{
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return NULL;
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}
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/**
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Allocates a buffer of type EfiRuntimeServicesData.
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Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData and returns
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a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is
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returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.
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@param AllocationSize The number of bytes to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateRuntimePool (
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IN UINTN AllocationSize
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)
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{
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return NULL;
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}
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