From 1bd17dce9a8297f86f3bb34b3f440490b601eca6 Mon Sep 17 00:00:00 2001
From: EmulatedSeasons <89668582+EmulatedSeasons@users.noreply.github.com>
Date: Fri, 31 May 2024 21:08:22 -0400
Subject: started working on pmm and fixed printf doing weird things to the
 numbers

---
 kernel/arch/x86_64/limine.cpp | 45 +++++++++++++++++++++++++++++++++++++------
 1 file changed, 39 insertions(+), 6 deletions(-)

(limited to 'kernel/arch/x86_64/limine.cpp')

diff --git a/kernel/arch/x86_64/limine.cpp b/kernel/arch/x86_64/limine.cpp
index 6d7984e..b592592 100644
--- a/kernel/arch/x86_64/limine.cpp
+++ b/kernel/arch/x86_64/limine.cpp
@@ -2,10 +2,11 @@
 #include <stddef.h>
 #include <stdio.h>
 #include <arch/x86_64/serial.h>
-#include "limine.h"
+#include <limine.h>
 #include "gdt.h"
 #include "idt.h"
 #include <framebuffer.h>
+#include <mm/pmm.h>
 
 namespace {
 __attribute__((used, section(".requests")))
@@ -21,6 +22,24 @@ volatile limine_framebuffer_request framebuffer_request = {
 };
 }
 
+namespace {
+__attribute__((used, section(".requests")))
+volatile limine_memmap_request memmap_request = {
+    .id = LIMINE_MEMMAP_REQUEST,
+    .revision = 0,
+    .response = nullptr  
+};
+}
+
+namespace {
+__attribute__((used, section(".requests")))
+volatile limine_hhdm_request hhdm_request = {
+    .id = LIMINE_HHDM_REQUEST,
+    .revision = 0,
+    .response = nullptr  
+};
+}
+
 namespace {
 __attribute__((used, section(".requests_start_marker")))
 volatile LIMINE_REQUESTS_START_MARKER;
@@ -30,7 +49,7 @@ volatile LIMINE_REQUESTS_END_MARKER;
 }
 
 namespace {
-void hcf() {
+[[noreturn]] void hcf() {
     asm("cli");
     for (;;) {
         asm("hlt");
@@ -41,7 +60,7 @@ void hcf() {
 extern void (*__init_array[])();
 extern void (*__init_array_end[])();
 
-extern "C" void kernel_main();
+void kernel_main();
 
 extern "C" void _start() {
     asm("cli");
@@ -75,8 +94,12 @@ extern "C" void _start() {
         hcf();
     }
 
+    if (memmap_request.response == nullptr) {
+        hcf();
+    }
+
     // Fetch the first framebuffer.
-    limine_framebuffer *framebuffer = framebuffer_request.response->framebuffers[0];
+    limine_framebuffer* framebuffer = framebuffer_request.response->framebuffers[0];
 
     // Note: we assume the framebuffer model is RGB with 32-bit pixels.
     // for (size_t i = 0; i < 100; i++) {
@@ -84,11 +107,10 @@ extern "C" void _start() {
     //     fb_ptr[i * (framebuffer->pitch / 4) + i] = 0xffffff;
     // }
 
-    asm("xchgw %bx, %bx");
     fb_init((uint32_t*)framebuffer->address, framebuffer->width, framebuffer->height);
     draw_pixel(727, 727, 0x9528fd);
     draw_pixel(0, 0, 0xff0000);
-    draw_pixel(1919, 1079, 0x00ff00);
+    draw_pixel(framebuffer->width - 1, framebuffer->height - 1, 0x00ff00);
     // for (size_t i = 0; i < framebuffer->mode_count; i++) {
     //     printf("Mode %d\n", i);
     //     printf("Pitch %d\nWidth %d\nHeight %d\nbpp %d\nmem_model %d\n",
@@ -100,6 +122,17 @@ extern "C" void _start() {
     printf("Pitch %d\nWidth %d\nHeight %d\nbpp %d\nmem_model %d\n",
         framebuffer->pitch, framebuffer->width, framebuffer->height,
         framebuffer->bpp, framebuffer->memory_model);
+    
+    limine_memmap_response* memmap = memmap_request.response;
+    for (int i = 0; i < memmap->entry_count; i++) {
+        printf("base: %lx\nlength: %lx\ntype: %d\n\n", 
+        memmap->entries[i]->base, memmap->entries[i]->length, memmap->entries[i]->type);
+    }
+
+    // broken printf mirroring 64 bit values for some reason
+    //uint64_t tester = 0xFFFE0000000000AE + 1;
+    //printf("aaaa: %lx\n", tester);
+    pmm_init(memmap_request.response, hhdm_request.response->offset);
 
     kernel_main();
 
-- 
cgit v1.2.3-70-g09d2