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Simple physical memory allocator, virtual memory manager

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Nathan
2020-07-09 18:50:13 -05:00
parent d3ba3c1d2a
commit 52c3754305
25 changed files with 795 additions and 316 deletions
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33
src/quarkkernel.cpp
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@@ -1,24 +1,39 @@
#include <stddef.h>
#include <stdint.h>
#include "systypes.hpp"
#include "systeminfo.hpp"
#include "memorymap.hpp"
#include "buddyallocator.hpp"
#include "addressspace.hpp"
#include "tty.h"
#if __STDC_HOSTED__ == 1 || __i686__ != 1
#error "ERROR: This program must be compiled for a freestanding environment, and currently only supports the i686 target."
#endif
#include "buddyallocator.h"
using namespace qkernel;
void main(void* bootInfo)
extern SystemInfo system_info;
extern MemoryMap::Region memory_map;
void main(char* cmdline)
{
char* vga = (char*) 0xC0400000;
TTY tty(vga);
TTY tty((char*) 0xC00B8000);
tty << "--Quark Kernel--\n";
tty << "Successfully enabled paging. Kernel image mapped to 0xC0000000.\n";
tty << "Low memory: \t" << (int) system_info.getLowMemory() << " KiB\n";
tty << "High memory:\t" << (int) system_info.getHighMemory() << " KiB\n";
tty << "Type\t\tLocation\t\tSize\n";
MemoryMap memmap(&memory_map, 16);
for(size_t i = 0; i < memmap.size() && memmap[i].getSize() > 0; i++)
{
tty << (int) memmap[i].getType() << "\t\t\t"
<< (void*) memmap[i].getLocation() << "\t\t"
<< (int) memmap[i].getSize() << "\n";
}
BuddyAllocator alloc(memmap, (char*) 0xC0000000,
system_info.getHighMemory() / 4 + 256, 6);
AddressSpace vmem(alloc);
tty << vmem.mmap((void*) 0x80000000, 0x10000) << '\n';
tty << "Nothing left to do. Hanging.\n";
tty << 18542;
char c = 'b';
return;
}