get memory map

kernel/src/efiMemory.cpp

@@ -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"
+};

kernel/src/efiMemory.h

@@ -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[];

kernel/src/kernel.cpp

@@ -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};
+	// display information of memory map
-	newRenderer.Print(0xFFFFFF, to_string((int64_t)-1234976));
+	uint64_t mMapEntries = bootInfo->mMapSize / bootInfo->mMapDescriptorSize;
-	newRenderer.cursorPosition = {0, 36};
+	for (int i = 0; i < mMapEntries; i++) {
-	newRenderer.Print(0xFFFFFF, to_string(-3.141));
+		EFI_MEMORY_DESCRIPTOR* desc = (EFI_MEMORY_DESCRIPTOR*)((uint64_t)bootInfo->mMap + (i * bootInfo->mMapDescriptorSize));
-	newRenderer.cursorPosition = {0, 54};
+		newRenderer.Print(0xFFFFFFFF, EFI_MEMORY_TYPE_STRINGS[desc->type]);
-	newRenderer.Print(0xFFFFFF, to_hstring((uint64_t)0xF0));
+		newRenderer.Print(0xFFFFFFFF, " ");
-	newRenderer.cursorPosition = {0, 72};
+		newRenderer.Print(0xFFFF00FF, to_string(desc->numPages * 4096 / 1024));
-	newRenderer.Print(0xFFFFFF, to_hstring((uint32_t)0xF0));
+		newRenderer.Print(0xFFFF00FF, " KB");
-	newRenderer.cursorPosition = {0, 90};
+		newRenderer.cursorPosition = {0, newRenderer.cursorPosition.y + 18};
-	newRenderer.Print(0xFFFFFF, to_hstring((uint16_t)0xF0));
+	}
-	newRenderer.cursorPosition = {0, 108};
-	newRenderer.Print(0xFFFFFF, to_hstring((uint8_t)0xF0));
 
 	return;
 }