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Finished Virtual Memory Manager!!! Paging etc. now works perfectly*

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*i have no idea if it works right, but it doesn't seem to be broken
This commit is contained in:
Tom-on
2024-05-23 20:53:15 +02:00
parent 2072c8fe53
commit e728571393
8 changed files with 414 additions and 178 deletions
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src/kernel.c
+38 -26
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@@ -15,42 +15,18 @@
#include <sound/pcspk.h>
#include <sound/notes.h>
#include <memory/virtual.h>
#include <memory/addresses.h>
#define PROMPT "#> "
char* filetable = (char*)0x7000; // Pretty sure we don't have to care about the bootloader at 0x7c00
uint32_t memmapAddr = 0x30000;
// Function declarations
void printFiletable(char* ft);
void printPhysicalMemmap();
void main() {
// Memory manager setup
uint32_t smapEntryCount = *(uint32_t*)0x8500;
smapEntry_t* smapEntries = (smapEntry_t*)0x8504;
uint32_t totalMemory = smapEntries[smapEntryCount - 1].baseAddress + smapEntries[smapEntryCount - 1].length - 1;
setupMemoryManager(memmapAddr, totalMemory);
for (uint32_t i = 0; i < smapEntryCount; i++) {
if (smapEntries[i].type == 1) {
initMemoryRegion(smapEntries[i].baseAddress, smapEntries[i].length);
}
}
deinitMemoryRegion(0x1000, 0x9000); // Reserve kernel memory (under 0xa000)
deinitMemoryRegion(memmapAddr, maxBlocks / BLOCKS_PER_BYTE);
// TODO: Find font in filetable
diskRead(46, 4, font); // Read font from disk
clear();
print("kern.\n\n");
diskRead(5, 1, filetable); // Read the filetable and store it in memory
// Interrupts
// Interrupt setup
setupIdt();
setupExceptions();
idtSetGate(0x80, syscallHandler, USR_INT_GAME_FLAGS); // Setup Syscall handler in IDT for int 0x80
@@ -63,6 +39,42 @@ void main() {
setupRtc();
setupKeyboard();
// Physical memory manager setup
uint32_t smapEntryCount = *(uint32_t*)0x8500;
smapEntry_t* smapEntries = (smapEntry_t*)0x8504;
uint32_t totalMemory = smapEntries[smapEntryCount - 1].baseAddress + smapEntries[smapEntryCount - 1].length - 1;
setupPhysicalMemoryManager(MEMMAP_AREA, totalMemory);
for (uint32_t i = 0; i < smapEntryCount; i++) {
if (smapEntries[i].type == 1) {
initMemoryRegion(smapEntries[i].baseAddress, smapEntries[i].length);
}
}
deinitMemoryRegion(0x1000, 0x9000); // Reserve kernel memory (under 0xa000)
deinitMemoryRegion(MEMMAP_AREA, maxBlocks / BLOCKS_PER_BYTE);
// Virtual memory manager setup
setupVirtualMemoryManager(); // TODO: Check if it succeeds
// Identity map VBE framebuffer
uint32_t fbSize = (gfxMode->yRes * gfxMode->linearBytesPerScanline) / PAGE_SIZE;
if (fbSize % PAGE_SIZE > 0) { fbSize++; }
fbSize *= 2; // Double for hardware
for (uint32_t i = 0, fbStart = gfxMode->physicalBasePtr; i < fbSize; i++, fbStart += PAGE_SIZE) {
mapPage((void*)fbStart, (void*)fbStart);
}
deinitMemoryRegion(gfxMode->physicalBasePtr, fbSize * BLOCK_SIZE);
// Screen setup
diskRead(46, 4, font); // TODO: Find font in filetable
clear();
print("kern.\n\n");
diskRead(5, 1, filetable); // Read the filetable and store it in memory
// Run Interactive Shell Program
// TODO: Make it in another file
while (1) {