Nigel/BarinkOS
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Multiboot Memory Map get copied to a "safe" place

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Nigel Barink
2022-08-23 21:35:19 +02:00
parent 5051b8903c
commit 59ba41f3d2
5 changed files with 151 additions and 43 deletions
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72
source/kernel/kernel.cpp
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@ -19,6 +19,22 @@ extern "C" void early_main()
* Show a little banner for cuteness
*/
printf("|=== BarinkOS ===|\n");
printf("Kernel End Addr: 0x%x\n" , &kernel_end + KERNEL_BASE_ADDR);
uint32_t PageDirectoryEntryIndex = ((uint32_t)&kernel_end + KERNEL_BASE_ADDR ) >> 2 ;
uint32_t PageTableEntryIndex = (((uint32_t)&kernel_end + KERNEL_BASE_ADDR) >> 12) & 0x1FFF;
printf("Kernel End PDE: %d, PTE: %d\n" , PageDirectoryEntryIndex, PageTableEntryIndex);
uint32_t BootInfoStruct = BootInfoBlock_pptr + 0xC0000000;
printf("Addr BootInfostruct: 0x%x\n", BootInfoStruct);
uint32_t PageDirectoryEntryIndex2 = (BootInfoStruct ) >> 2 ;
uint32_t PageTableEntryIndex2 = (BootInfoStruct >> 12) & 0x1FFF;
printf("PDE: 0x%x, PTE: 0x%x\n", PageDirectoryEntryIndex2 , PageTableEntryIndex2 );
BootInfoBlock* BootInfo = (BootInfoBlock*) ( BootInfoBlock_pptr + 0xC0000000 );
@ -41,6 +57,62 @@ extern "C" void early_main()
if(BootInfo->PhysicalMemoryMapAvailable)
{
printf("- Physical Memory Map available!\n");
// Print the memory regions
MemoryInfoBlock* currentBlock = (MemoryInfoBlock*) ((uint32_t)BootInfo->MemoryMap + KERNEL_BASE_ADDR) ;
kterm_setcolor(VGA_COLOR_RED);
printf("size of MemoryInfoBlock: 0x%x\n", sizeof(MemoryInfoBlock));
kterm_setcolor(VGA_COLOR_CYAN);
printf("Kernel End is at address: 0x%x\n", &kernel_end);
printf("BootInfo is at address: 0x%x\n", BootInfo);
printf("map is at address: 0x%x\n", currentBlock + KERNEL_BASE_ADDR);
kterm_setcolor(VGA_COLOR_WHITE);
while( (uint32_t)currentBlock->next != 0x0 )
{
kterm_setcolor(VGA_COLOR_CYAN);
printf("map is at address: 0x%x\n", ( (uint32_t)currentBlock ));
kterm_setcolor(VGA_COLOR_WHITE);
/*
uint32_t pageDirectoryIndex = ((uint32_t)&currentBlock ) >> 22;
printf("pageDirectoryIndex: %d\n", pageDirectoryIndex);
uint32_t pageTableIndex = ((uint32_t)&currentBlock >> 12) & 0x1FFF;
printf("PagTableIndex: %d\n", pageTableIndex);
*/
//printf("boot_page_directory addr: 0x%x\n", &boot_page_directory);
//printf("boot_page_table addr: 0x%x\n", &multiboot_page_table);
printf("Memory Region: \n");
if(IS_AVAILABLE_MEM(currentBlock->type)){
//printf("AVAILABLE RAM\n");
}
else if(IS_ACPI_MEM(currentBlock->type)){
printf("ACPI MEMORY\n");
}
else if(IS_RESERVED_MEM(currentBlock->type)){
printf("RESERVED MEMORY\n");
}
else if(IS_NVS_MEMORY(currentBlock->type)){
printf("NVS MEMORY \n");
}
else if(IS_BADRAM_MEMORY(currentBlock->type)){
printf("BADRAM MEMORY \n");
}
else {
// printf("(TYPE 0x%x )TYPE NOT SPECIFIED\n", currentBlock->type);
}
// printf("Base address: 0x%x, Memory size: 0x%x\n", currentBlock->Base_addr, currentBlock->Memory_Size);
currentBlock = (MemoryInfoBlock*) ((uint32_t)currentBlock->next + KERNEL_BASE_ADDR );
}
}
asm volatile("mov %cr0, %eax ");