Divided the kernel into seperate distinct phases
The first stage after GRUB will be Pre-Kernel. This stage will organize the information we receive from the bootloader. (in our case that will be grub) The second stage is for now called early_main. The program will at this point already be running in virtual higher-half / higher-quarter address space. The goal of the second stage is to set up the kernel in such a way that we are ready to jump in to usermode. The third stage is for now called kernel_main. This stage will jump us into usermode and load the startup programs. - Added a GRUB entry for tests - Started writing the pre-kernel stage - Removed knowledge of multiboot from early_main - Edited the linkerscript to link variables in pre-kernel to lower address space. ( from 1MB and up)
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@ -1,6 +1,6 @@
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#include "MBI_MMap.h"
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/*
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void mapMultibootMemoryMap( MemoryInfo* memInfo , multiboot_info_t *mbt) {
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printf("mmap_addr = 0x%x, mmap_length = 0x%x\n", (unsigned) mbt->mmap_addr , (unsigned) mbt->mmap_length );
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@ -23,13 +23,13 @@ void mapMultibootMemoryMap( MemoryInfo* memInfo , multiboot_info_t *mbt) {
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}
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*/
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/**
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* @brief Debug Verbose functions
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*
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* @param mmap
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*/
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/*
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void print_Multiboot_memory_Map(multiboot_memory_map_t* mmap) {
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printf(
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"size = 0x%x, base_addr = 0x%x%08x, length = 0x%x%08x, type = 0x%x\n",
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@ -41,3 +41,4 @@ void print_Multiboot_memory_Map(multiboot_memory_map_t* mmap) {
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(unsigned) mmap->type
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);
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}
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*/
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@ -1,16 +1,18 @@
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#pragma once
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#include <stddef.h>
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#include "../../multiboot.h"
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//#include "../../multiboot.h"
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#include "../memoryinfo.h"
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void initialise_available_regions(uint32_t memoryMapAddr, uint32_t memoryMapLastAddr, uint32_t* memoryBitMap, int* used_blocks);
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/*
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void mapMultibootMemoryMap( MemoryInfo* memInfo , multiboot_info_t *mbt);
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*/
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/**
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* @brief Debug Verbose Functions
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*
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* @param mmap
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*/
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/*
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void print_Multiboot_memory_Map(multiboot_memory_map_t* mmap);
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*/
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