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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <AGESA.h>
#include <amdlib.h>
#include <cbmem.h>
#include <northbridge/amd/agesa/agesa_helper.h>
#include <northbridge/amd/agesa/BiosCallOuts.h>
#include <acpi/acpi.h>
#include <console/console.h>
#include <string.h>
/* BIOS_HEAP_START_ADDRESS is only for cold boots. */
#define BIOS_HEAP_SIZE 0x30000
#define BIOS_HEAP_START_ADDRESS 0x010000000
#if CONFIG(HAVE_ACPI_RESUME) && (HIGH_MEMORY_SCRATCH < BIOS_HEAP_SIZE)
#error Increase HIGH_MEMORY_SCRATCH allocation
#endif
void *GetHeapBase(void)
{
void *heap = (void *)BIOS_HEAP_START_ADDRESS;
if (acpi_is_wakeup_s3()) {
/* FIXME: For S3 resume path, buffer is in CBMEM
* with some arbitrary header. */
heap = cbmem_find(CBMEM_ID_RESUME_SCRATCH);
heap += 0x10;
}
return heap;
}
void EmptyHeap(void)
{
void *base = GetHeapBase();
memset(base, 0, BIOS_HEAP_SIZE);
printk(BIOS_DEBUG, "Wiped HEAP at [%08x - %08x]\n",
(unsigned int)(uintptr_t) base, (unsigned int)(uintptr_t) base + BIOS_HEAP_SIZE - 1);
}
#if defined(HEAP_CALLOUT_RUNTIME) && ENV_RAMSTAGE
#define AGESA_RUNTIME_SIZE 4096
static AGESA_STATUS alloc_cbmem(AGESA_BUFFER_PARAMS *AllocParams)
{
static unsigned int used = 0;
void *p = cbmem_find(CBMEM_ID_AGESA_RUNTIME);
if ((AGESA_RUNTIME_SIZE - used) < AllocParams->BufferLength) {
return AGESA_BOUNDS_CHK;
}
/* first time allocation */
if (!p) {
p = cbmem_add(CBMEM_ID_AGESA_RUNTIME, AGESA_RUNTIME_SIZE);
if (!p)
return AGESA_BOUNDS_CHK;
}
AllocParams->BufferPointer = p + used;
used += AllocParams->BufferLength;
return AGESA_SUCCESS;
}
#endif
typedef struct _BIOS_HEAP_MANAGER {
UINT32 StartOfAllocatedNodes;
UINT32 StartOfFreedNodes;
} BIOS_HEAP_MANAGER;
typedef struct _BIOS_BUFFER_NODE {
UINT32 BufferHandle;
UINT32 BufferSize;
UINT32 NextNodeOffset;
} BIOS_BUFFER_NODE;
static AGESA_STATUS agesa_AllocateBuffer(BIOS_HEAP_MANAGER *BiosHeapBasePtr,
AGESA_BUFFER_PARAMS *AllocParams)
{
UINT32 AvailableHeapSize;
UINT8 *BiosHeapBaseAddr = (void *)BiosHeapBasePtr;
UINT32 CurrNodeOffset;
UINT32 PrevNodeOffset;
UINT32 FreedNodeOffset;
UINT32 BestFitNodeOffset;
UINT32 BestFitPrevNodeOffset;
UINT32 NextFreeOffset;
BIOS_BUFFER_NODE *CurrNodePtr;
BIOS_BUFFER_NODE *FreedNodePtr;
BIOS_BUFFER_NODE *BestFitNodePtr;
BIOS_BUFFER_NODE *BestFitPrevNodePtr;
BIOS_BUFFER_NODE *NextFreePtr;
AllocParams->BufferPointer = NULL;
AvailableHeapSize = BIOS_HEAP_SIZE - sizeof(BIOS_HEAP_MANAGER);
if (BiosHeapBasePtr->StartOfAllocatedNodes == 0) {
/* First allocation */
CurrNodeOffset = sizeof(BIOS_HEAP_MANAGER);
CurrNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + CurrNodeOffset);
CurrNodePtr->BufferHandle = AllocParams->BufferHandle;
CurrNodePtr->BufferSize = AllocParams->BufferLength;
CurrNodePtr->NextNodeOffset = 0;
AllocParams->BufferPointer = (UINT8 *) CurrNodePtr + sizeof(BIOS_BUFFER_NODE);
/* Update the remaining free space */
FreedNodeOffset = CurrNodeOffset + CurrNodePtr->BufferSize + sizeof(BIOS_BUFFER_NODE);
FreedNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + FreedNodeOffset);
FreedNodePtr->BufferSize = AvailableHeapSize
- (FreedNodeOffset - CurrNodeOffset)
- sizeof(BIOS_BUFFER_NODE);
FreedNodePtr->NextNodeOffset = 0;
/* Update the offsets for Allocated and Freed nodes */
BiosHeapBasePtr->StartOfAllocatedNodes = CurrNodeOffset;
BiosHeapBasePtr->StartOfFreedNodes = FreedNodeOffset;
} else {
/* Find out whether BufferHandle has been allocated on the heap.
* If it has, return AGESA_BOUNDS_CHK.
*/
CurrNodeOffset = BiosHeapBasePtr->StartOfAllocatedNodes;
CurrNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + CurrNodeOffset);
while (CurrNodeOffset != 0) {
CurrNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + CurrNodeOffset);
if (CurrNodePtr->BufferHandle == AllocParams->BufferHandle) {
return AGESA_BOUNDS_CHK;
}
CurrNodeOffset = CurrNodePtr->NextNodeOffset;
/* If BufferHandle has not been allocated on the heap, CurrNodePtr here points
* to the end of the allocated nodes list.
*/
}
/* Find the node that best fits the requested buffer size */
FreedNodeOffset = BiosHeapBasePtr->StartOfFreedNodes;
PrevNodeOffset = FreedNodeOffset;
BestFitNodeOffset = 0;
BestFitPrevNodeOffset = 0;
while (FreedNodeOffset != 0) {
FreedNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + FreedNodeOffset);
if (FreedNodePtr->BufferSize >= (AllocParams->BufferLength + sizeof(BIOS_BUFFER_NODE))) {
if (BestFitNodeOffset == 0) {
/* First node that fits the requested buffer size */
BestFitNodeOffset = FreedNodeOffset;
BestFitPrevNodeOffset = PrevNodeOffset;
} else {
/* Find out whether current node is a better fit than the previous nodes */
BestFitNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + BestFitNodeOffset);
if (BestFitNodePtr->BufferSize > FreedNodePtr->BufferSize) {
BestFitNodeOffset = FreedNodeOffset;
BestFitPrevNodeOffset = PrevNodeOffset;
}
}
}
PrevNodeOffset = FreedNodeOffset;
FreedNodeOffset = FreedNodePtr->NextNodeOffset;
} /* end of while loop */
if (BestFitNodeOffset == 0) {
/* If we could not find a node that fits the requested buffer
* size, return AGESA_BOUNDS_CHK.
*/
return AGESA_BOUNDS_CHK;
} else {
BestFitNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + BestFitNodeOffset);
BestFitPrevNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + BestFitPrevNodeOffset);
/* If BestFitNode is larger than the requested buffer, fragment the node further */
if (BestFitNodePtr->BufferSize > (AllocParams->BufferLength + sizeof(BIOS_BUFFER_NODE))) {
NextFreeOffset = BestFitNodeOffset + AllocParams->BufferLength + sizeof(BIOS_BUFFER_NODE);
NextFreePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + NextFreeOffset);
NextFreePtr->BufferSize = BestFitNodePtr->BufferSize - (AllocParams->BufferLength + sizeof(BIOS_BUFFER_NODE));
NextFreePtr->NextNodeOffset = BestFitNodePtr->NextNodeOffset;
} else {
/* Otherwise, next free node is NextNodeOffset of BestFitNode */
NextFreeOffset = BestFitNodePtr->NextNodeOffset;
}
/* If BestFitNode is the first buffer in the list, then update
* StartOfFreedNodes to reflect the new free node.
*/
if (BestFitNodeOffset == BiosHeapBasePtr->StartOfFreedNodes) {
BiosHeapBasePtr->StartOfFreedNodes = NextFreeOffset;
} else {
BestFitPrevNodePtr->NextNodeOffset = NextFreeOffset;
}
/* Add BestFitNode to the list of Allocated nodes */
CurrNodePtr->NextNodeOffset = BestFitNodeOffset;
BestFitNodePtr->BufferSize = AllocParams->BufferLength;
BestFitNodePtr->BufferHandle = AllocParams->BufferHandle;
BestFitNodePtr->NextNodeOffset = 0;
/* Remove BestFitNode from list of Freed nodes */
AllocParams->BufferPointer = (UINT8 *) BestFitNodePtr + sizeof(BIOS_BUFFER_NODE);
}
}
return AGESA_SUCCESS;
}
static AGESA_STATUS agesa_DeallocateBuffer(BIOS_HEAP_MANAGER *BiosHeapBasePtr,
AGESA_BUFFER_PARAMS *AllocParams)
{
UINT8 *BiosHeapBaseAddr = (void *)BiosHeapBasePtr;
UINT32 AllocNodeOffset;
UINT32 PrevNodeOffset;
UINT32 NextNodeOffset;
UINT32 FreedNodeOffset;
UINT32 EndNodeOffset;
BIOS_BUFFER_NODE *AllocNodePtr;
BIOS_BUFFER_NODE *PrevNodePtr;
BIOS_BUFFER_NODE *FreedNodePtr;
BIOS_BUFFER_NODE *NextNodePtr;
/* Find target node to deallocate in list of allocated nodes.
* Return AGESA_BOUNDS_CHK if the BufferHandle is not found.
*/
AllocNodeOffset = BiosHeapBasePtr->StartOfAllocatedNodes;
AllocNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + AllocNodeOffset);
PrevNodeOffset = AllocNodeOffset;
while (AllocNodePtr->BufferHandle != AllocParams->BufferHandle) {
if (AllocNodePtr->NextNodeOffset == 0) {
return AGESA_BOUNDS_CHK;
}
PrevNodeOffset = AllocNodeOffset;
AllocNodeOffset = AllocNodePtr->NextNodeOffset;
AllocNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + AllocNodeOffset);
}
/* Remove target node from list of allocated nodes */
PrevNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + PrevNodeOffset);
PrevNodePtr->NextNodeOffset = AllocNodePtr->NextNodeOffset;
/* Zero out the buffer, and clear the BufferHandle */
LibAmdMemFill ((UINT8 *)AllocNodePtr + sizeof(BIOS_BUFFER_NODE), 0, AllocNodePtr->BufferSize, &(AllocParams->StdHeader));
AllocNodePtr->BufferHandle = 0;
/* Add deallocated node in order to the list of freed nodes */
FreedNodeOffset = BiosHeapBasePtr->StartOfFreedNodes;
FreedNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + FreedNodeOffset);
EndNodeOffset = AllocNodeOffset + AllocNodePtr->BufferSize +
sizeof(BIOS_BUFFER_NODE);
if (AllocNodeOffset < FreedNodeOffset) {
/* Add to the start of the freed list */
if (EndNodeOffset == FreedNodeOffset) {
/* If the freed node is adjacent to the first node in the list, concatenate both nodes */
AllocNodePtr->BufferSize += FreedNodePtr->BufferSize +
sizeof(BIOS_BUFFER_NODE);
AllocNodePtr->NextNodeOffset = FreedNodePtr->NextNodeOffset;
/* Zero out the FreedNode header */
memset((UINT8 *)FreedNodePtr, 0,
sizeof(BIOS_BUFFER_NODE));
} else {
/* Otherwise, add freed node to the start of the list
* Update NextNodeOffset and BufferSize to include the
* size of BIOS_BUFFER_NODE.
*/
AllocNodePtr->NextNodeOffset = FreedNodeOffset;
}
/* Update StartOfFreedNodes to the new first node */
BiosHeapBasePtr->StartOfFreedNodes = AllocNodeOffset;
} else {
/* Traverse list of freed nodes to find where the deallocated node
* should be placed.
*/
NextNodeOffset = FreedNodeOffset;
NextNodePtr = FreedNodePtr;
while (AllocNodeOffset > NextNodeOffset) {
PrevNodeOffset = NextNodeOffset;
if (NextNodePtr->NextNodeOffset == 0) {
break;
}
NextNodeOffset = NextNodePtr->NextNodeOffset;
NextNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + NextNodeOffset);
}
/* If deallocated node is adjacent to the next node,
* concatenate both nodes.
*/
if (NextNodeOffset == EndNodeOffset) {
NextNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + NextNodeOffset);
AllocNodePtr->BufferSize += NextNodePtr->BufferSize +
sizeof(BIOS_BUFFER_NODE);
AllocNodePtr->NextNodeOffset = NextNodePtr->NextNodeOffset;
/* Zero out the NextNode header */
memset((UINT8 *)NextNodePtr, 0,
sizeof(BIOS_BUFFER_NODE));
} else {
/*AllocNodePtr->NextNodeOffset = FreedNodePtr->NextNodeOffset; */
AllocNodePtr->NextNodeOffset = NextNodeOffset;
}
/* If deallocated node is adjacent to the previous node,
* concatenate both nodes.
*/
PrevNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + PrevNodeOffset);
EndNodeOffset = PrevNodeOffset + PrevNodePtr->BufferSize +
sizeof(BIOS_BUFFER_NODE);
if (AllocNodeOffset == EndNodeOffset) {
PrevNodePtr->NextNodeOffset = AllocNodePtr->NextNodeOffset;
PrevNodePtr->BufferSize += AllocNodePtr->BufferSize +
sizeof(BIOS_BUFFER_NODE);
/* Zero out the AllocNode header */
memset((UINT8 *)AllocNodePtr, 0,
sizeof(BIOS_BUFFER_NODE));
} else {
PrevNodePtr->NextNodeOffset = AllocNodeOffset;
}
}
return AGESA_SUCCESS;
}
static AGESA_STATUS agesa_LocateBuffer(BIOS_HEAP_MANAGER *BiosHeapBasePtr,
AGESA_BUFFER_PARAMS *AllocParams)
{
UINT32 AllocNodeOffset;
UINT8 *BiosHeapBaseAddr = (void *)BiosHeapBasePtr;
BIOS_BUFFER_NODE *AllocNodePtr;
AllocNodeOffset = BiosHeapBasePtr->StartOfAllocatedNodes;
AllocNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + AllocNodeOffset);
while (AllocParams->BufferHandle != AllocNodePtr->BufferHandle) {
if (AllocNodePtr->NextNodeOffset == 0) {
AllocParams->BufferPointer = NULL;
AllocParams->BufferLength = 0;
return AGESA_BOUNDS_CHK;
} else {
AllocNodeOffset = AllocNodePtr->NextNodeOffset;
AllocNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr + AllocNodeOffset);
}
}
AllocParams->BufferPointer = (UINT8 *) ((UINT8 *) AllocNodePtr + sizeof(BIOS_BUFFER_NODE));
AllocParams->BufferLength = AllocNodePtr->BufferSize;
return AGESA_SUCCESS;
}
AGESA_STATUS HeapManagerCallout(UINT32 Func, UINTN Data, VOID *ConfigPtr)
{
AGESA_BUFFER_PARAMS *AllocParams = ConfigPtr;
#if defined(HEAP_CALLOUT_RUNTIME) && ENV_RAMSTAGE
if (Func == AGESA_ALLOCATE_BUFFER && Data == HEAP_CALLOUT_RUNTIME)
return alloc_cbmem(AllocParams);
#endif
/* Must not call GetHeapBase() in AGESA_UNSUPPORTED path. */
if (Func == AGESA_LOCATE_BUFFER)
return agesa_LocateBuffer(GetHeapBase(), AllocParams);
else if (Func == AGESA_ALLOCATE_BUFFER)
return agesa_AllocateBuffer(GetHeapBase(), AllocParams);
else if (Func == AGESA_DEALLOCATE_BUFFER)
return agesa_DeallocateBuffer(GetHeapBase(), AllocParams);
return AGESA_UNSUPPORTED;
}
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