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essence-os
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Merge branch 'efi2mb' into 'master' 

uefi: Increase max kernel size to 2MiB

See merge request nakst/essence!9
This commit is contained in:
phcoder 2023-10-25 23:49:15 +00:00
parent 0a70170952 1228da6189
commit f0c7e10fe8
1 changed files with 8 additions and 6 deletions
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14
boot/x86/uefi.c
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@ -75,8 +75,10 @@ typedef struct MemoryRegion {
#define MAX_MEMORY_REGIONS (1024)
MemoryRegion memoryRegions[1024];
#define KERNEL_BUFFER_SIZE (1048576)
#define kernelBuffer ((char *) 0x200000)
#define KERNEL_BUFFER_ADDRESS (0x200000)
#define KERNEL_BUFFER_SIZE (0x200000)
#define kernelBuffer ((char *) KERNEL_BUFFER_ADDRESS)
#define KERNEL_BUFFER_END (KERNEL_BUFFER_ADDRESS + KERNEL_BUFFER_SIZE)
#define IID_BUFFER_SIZE (16)
char iidBuffer[IID_BUFFER_SIZE];
#define MEMORY_MAP_BUFFER_SIZE (16384)
@ -118,12 +120,12 @@ EFI_STATUS EFIAPI efi_main(EFI_HANDLE imageHandle, EFI_SYSTEM_TABLE *_systemTabl
uint32_t *framebuffer, horizontalResolution, verticalResolution, pixelsPerScanline;
ElfHeader *header;
// Make sure 0x100000 -> 0x300000 is identity mapped.
// Make sure 0x100000 -> 0x400000 is identity mapped.
{
EFI_PHYSICAL_ADDRESS address = 0x100000;
if (EFI_SUCCESS != uefi_call_wrapper(systemTable->BootServices->AllocatePages, 4, AllocateAddress, EfiLoaderData, 0x200, &address)) {
Error(L"Error: Could not allocate 1MB->3MB.\n");
if (EFI_SUCCESS != uefi_call_wrapper(systemTable->BootServices->AllocatePages, 4, AllocateAddress, EfiLoaderData, (KERNEL_BUFFER_END - address) >> 12, &address)) {
Error(L"Error: Could not allocate 1MB->4MB.\n");
}
}
@ -245,7 +247,7 @@ EFI_STATUS EFIAPI efi_main(EFI_HANDLE imageHandle, EFI_SYSTEM_TABLE *_systemTabl
for (uintptr_t i = 0; i < size / descriptorSize && memoryRegionCount != MAX_MEMORY_REGIONS - 1; i++) {
EFI_MEMORY_DESCRIPTOR *descriptor = (EFI_MEMORY_DESCRIPTOR *) (memoryMapBuffer + i * descriptorSize);
if (descriptor->Type == EfiConventionalMemory && descriptor->PhysicalStart >= 0x300000) {
if (descriptor->Type == EfiConventionalMemory && descriptor->PhysicalStart >= KERNEL_BUFFER_END) {
memoryRegions[memoryRegionCount].base = descriptor->PhysicalStart;
memoryRegions[memoryRegionCount].pages = descriptor->NumberOfPages;
memoryRegionCount++;