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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (C) 2023 Karel Gardas
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <bsp.h>
#include <bsp/bootcard.h>
#include <efi.h>
#include <efilib.h>
#include <stdio.h>
extern Heap_Control *RTEMS_Malloc_Heap;
void bsp_memory_heap_extend(void);
extern EFI_BOOT_SERVICES *BS;
static UINT32 total_pages = 0;
static UINT32 allocated_pages = 0;
static UINT32 usable_pages = 0;
static EFI_PHYSICAL_ADDRESS physBuf;
static int error = 0;
static int extension_steps = 0;
#ifdef BSP_EFI_MMAP_PRINTOUT
static const char*
efi_memory_type(EFI_MEMORY_TYPE type);
#endif
void
efi_memory_heap_extend( void );
static UINT64
heap_size(void)
{
return RTEMS_Malloc_Heap->stats.size;
}
static UINT64
allocate_biggest_block( void )
{
UINT64 sz = 0;
EFI_MEMORY_DESCRIPTOR *map = 0, *p = 0;
UINTN key = 0, dsz = 0;
UINT32 dver = 0;
EFI_STATUS status = 0;
int i, ndesc = 0;
UINT64 to_alloc_pages = 0;
bool first_run = false;
if (total_pages == 0)
first_run = true;
// let's see available RAM
status = BS->GetMemoryMap(&sz, 0, &key, &dsz, &dver);
if (status != EFI_BUFFER_TOO_SMALL) {
printf("EFI: Can't determine memory map size\n");
return 0;
}
map = malloc(sz);
if (map == NULL) {
printf("EFI: Can't allocate memory map backing\n");
return 0;
}
status = BS->GetMemoryMap(&sz, map, &key, &dsz, &dver);
if (EFI_ERROR(status)) {
printf("EFI: Can't read memory map\n");
free(map);
return 0;
}
ndesc = sz / dsz;
#ifdef BSP_EFI_MMAP_PRINTOUT
if (first_run)
printf("%23s %12s %8s\n", "Type", "Physical", "#Pages");
#endif
for (i = 0, p = map; i < ndesc;
i++, p = NextMemoryDescriptor(p, dsz)) {
if (first_run) {
#ifdef BSP_EFI_MMAP_PRINTOUT
printf("%23s %012jx %08jx\n", efi_memory_type(p->Type),
(uintmax_t)p->PhysicalStart, (uintmax_t)p->NumberOfPages);
#endif
if (p->Type != EfiReservedMemoryType)
total_pages = total_pages + p->NumberOfPages;
if (p->Type == EfiConventionalMemory) {
usable_pages = usable_pages + p->NumberOfPages;
}
}
if (p->Type == EfiConventionalMemory) {
if (to_alloc_pages < p->NumberOfPages)
to_alloc_pages = p->NumberOfPages;
}
}
status = ST->BootServices->AllocatePages(AllocateAnyPages, EfiLoaderData, to_alloc_pages, &physBuf );
if (EFI_ERROR(status)) {
/* on some UEFI implementations it is not possible to allocate biggest available block
for whatever reasons. In that case, let's go wild and attempt to allocate
half of it */
error++;
status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, (to_alloc_pages / 2), &physBuf );
if (EFI_ERROR(status)) {
printf("EFI can't allocate: %lu pages nor half of the amount.\n", to_alloc_pages);
free(map);
return 0;
}
else {
to_alloc_pages = to_alloc_pages / 2;
}
}
allocated_pages = allocated_pages + to_alloc_pages;
sz = to_alloc_pages * 4096;
uintptr_t es = 0;
es = _Heap_Extend( RTEMS_Malloc_Heap, (void *)physBuf, sz, 0 );
free(map);
return es;
}
void efi_memory_heap_extend( void )
{
int i;
UINT64 asz = 0;
UINT64 oldsz, newsz = 0;
oldsz = heap_size();
for (i = 0; i < 1024; i++) {
/* let's try 1k alloc attempts */
asz = allocate_biggest_block();
if (asz == 0)
break;
extension_steps++;
}
newsz = heap_size();
printf("EFI: Total memory: %u pages, %u megabytes\n", total_pages, (total_pages * 4 / 1024));
printf("EFI: Usable memory: %u pages, %u megabytes\n", usable_pages, (usable_pages * 4 / 1024));
printf("EFI: Allocated memory: %u pages, %u megabytes\n", allocated_pages, (allocated_pages * 4 / 1024));
printf("RTEMS: Heap extended in %u steps with %u steps failed.\n", extension_steps, error);
uint64_t s = newsz - oldsz;
printf("RTEMS: Heap extended by %lu pages, %lu megabytes\n", (s / 4096), ((s / 1024) / 1024));
}
#ifdef BSP_EFI_MMAP_PRINTOUT
static const char*
efi_memory_type(EFI_MEMORY_TYPE type)
{
switch (type) {
case EfiReservedMemoryType:
return "Reserved";
case EfiLoaderCode:
return "LoaderCode";
case EfiLoaderData:
return "LoaderData";
case EfiBootServicesCode:
return "BootServicesCode";
case EfiBootServicesData:
return "BootServicesData";
case EfiRuntimeServicesCode:
return "RuntimeServicesCode";
case EfiRuntimeServicesData:
return "RuntimeServicesData";
case EfiConventionalMemory:
return "ConventionalMemory";
case EfiUnusableMemory:
return "UnusableMemory";
case EfiACPIReclaimMemory:
return "ACPIReclaimMemory";
case EfiACPIMemoryNVS:
return "ACPIMemoryNVS";
case EfiMemoryMappedIO:
return "MemoryMappedIO";
case EfiMemoryMappedIOPortSpace:
return "MemoryMappedIOPortSpace";
case EfiPalCode:
return "PalCode";
case EfiPersistentMemory:
return "PersistentMemory";
default:
return "Unknown Type";
}
}
#endif
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