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get memory map

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SpookyDervish
2026-01-28 13:25:40 +11:00
parent 35145022b5
commit d186e164f9
8 changed files with 42 additions and 13 deletions
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18
kernel/src/efiMemory.cpp Normal file
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@@ -0,0 +1,18 @@
#include "efiMemory.h"
const char* EFI_MEMORY_TYPE_STRINGS[] = {
"EfiReservedMemoryType",
"EfiLoaderCode",
"EfiLoaderData",
"EfiBootServicesCode",
"EfiBootServicesData",
"EfiRuntimeServicesCode",
"EfiRuntimeServicesData",
"EfiConventionalMemory",
"EfiUnusableMemory",
"EfiACPIReclaimMemory",
"EfiACPIMemoryNVS",
"EfiMemoryMappedIO",
"EfiMemoryMappedIOPortSpace",
"EfiPalCode"
};

12
kernel/src/efiMemory.h Normal file
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@@ -0,0 +1,12 @@
#pragma once
#include <stdint.h>
struct EFI_MEMORY_DESCRIPTOR {
uint32_t type;
void* physAddr;
void* virtAddr;
uint64_t numPages;
uint64_t attribs;
};
extern const char* EFI_MEMORY_TYPE_STRINGS[];

25
kernel/src/kernel.cpp
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@@ -2,6 +2,7 @@
#include <stdint.h>
#include "BasicRenderer.h"
#include "cstr.h"
#include "efiMemory.h"
struct BootInfo {
@@ -20,19 +21,17 @@ extern "C" void __stack_chk_fail(void) {
extern "C" void _start(BootInfo* bootInfo) {
BasicRenderer newRenderer = BasicRenderer(bootInfo->framebuffer, bootInfo->psf1_Font);
newRenderer.Print(0xFFFFFF, to_string((uint64_t)1234976));
newRenderer.cursorPosition = {0, 18};
newRenderer.Print(0xFFFFFF, to_string((int64_t)-1234976));
newRenderer.cursorPosition = {0, 36};
newRenderer.Print(0xFFFFFF, to_string(-3.141));
newRenderer.cursorPosition = {0, 54};
newRenderer.Print(0xFFFFFF, to_hstring((uint64_t)0xF0));
newRenderer.cursorPosition = {0, 72};
newRenderer.Print(0xFFFFFF, to_hstring((uint32_t)0xF0));
newRenderer.cursorPosition = {0, 90};
newRenderer.Print(0xFFFFFF, to_hstring((uint16_t)0xF0));
newRenderer.cursorPosition = {0, 108};
newRenderer.Print(0xFFFFFF, to_hstring((uint8_t)0xF0));
// display information of memory map
uint64_t mMapEntries = bootInfo->mMapSize / bootInfo->mMapDescriptorSize;
for (int i = 0; i < mMapEntries; i++) {
EFI_MEMORY_DESCRIPTOR* desc = (EFI_MEMORY_DESCRIPTOR*)((uint64_t)bootInfo->mMap + (i * bootInfo->mMapDescriptorSize));
newRenderer.Print(0xFFFFFFFF, EFI_MEMORY_TYPE_STRINGS[desc->type]);
newRenderer.Print(0xFFFFFFFF, " ");
newRenderer.Print(0xFFFF00FF, to_string(desc->numPages * 4096 / 1024));
newRenderer.Print(0xFFFF00FF, " KB");
newRenderer.cursorPosition = {0, newRenderer.cursorPosition.y + 18};
}
return;
}