mirror of
https://github.com/EnderIce2/Fennix.git
synced 2025-07-01 18:39:16 +00:00
Merge remote-tracking branch 'Kernel/master'
This commit is contained in:
EnderIce2
207
Kernel/core/memory/reserve_essentials.cpp
Normal file
207
Kernel/core/memory/reserve_essentials.cpp
Normal file
@ -0,0 +1,207 @@
|
||||
/*
|
||||
This file is part of Fennix Kernel.
|
||||
|
||||
Fennix Kernel is free software: you can redistribute it and/or
|
||||
modify it under the terms of the GNU General Public License as
|
||||
published by the Free Software Foundation, either version 3 of
|
||||
the License, or (at your option) any later version.
|
||||
|
||||
Fennix Kernel is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#include <memory.hpp>
|
||||
|
||||
#include <acpi.hpp>
|
||||
#include <debug.h>
|
||||
#include <elf.h>
|
||||
#ifdef DEBUG
|
||||
#include <uart.hpp>
|
||||
#endif
|
||||
|
||||
#include "../../kernel.h"
|
||||
|
||||
namespace Memory
|
||||
{
|
||||
__no_sanitize("alignment") void Physical::ReserveEssentials()
|
||||
{
|
||||
debug("Reserving pages...");
|
||||
/* The bootloader won't give us the entire mapping, so we
|
||||
reserve everything and then unreserve the usable pages. */
|
||||
this->ReservePages(0, TO_PAGES(bInfo.Memory.Size));
|
||||
debug("Unreserving usable pages...");
|
||||
|
||||
for (uint64_t i = 0; i < bInfo.Memory.Entries; i++)
|
||||
{
|
||||
if (bInfo.Memory.Entry[i].Type == Usable)
|
||||
{
|
||||
if (uintptr_t(bInfo.Memory.Entry[i].BaseAddress) <= 0xFFFFF)
|
||||
continue;
|
||||
|
||||
this->UnreservePages(bInfo.Memory.Entry[i].BaseAddress,
|
||||
TO_PAGES(bInfo.Memory.Entry[i].Length));
|
||||
}
|
||||
}
|
||||
|
||||
debug("Reserving 0x0-0xFFFFF range...");
|
||||
// this->ReservePage((void *)0x0); /* Trampoline stack, gdt, idt, etc... */
|
||||
// this->ReservePages((void *)0x2000, 4); /* TRAMPOLINE_START */
|
||||
|
||||
/* Reserve the lower part of memory. (0x0-0xFFFFF)
|
||||
This includes: BIOS, EBDA, VGA, SMP, etc...
|
||||
https://wiki.osdev.org/Memory_Map_(x86)
|
||||
*/
|
||||
this->ReservePages((void *)0x0, TO_PAGES(0xFFFFF));
|
||||
|
||||
debug("Reserving bitmap region %#lx-%#lx...",
|
||||
PageBitmap.Buffer,
|
||||
(void *)((uintptr_t)PageBitmap.Buffer + PageBitmap.Size));
|
||||
|
||||
this->ReservePages(PageBitmap.Buffer, TO_PAGES(PageBitmap.Size));
|
||||
|
||||
debug("Reserving kernel physical region %#lx-%#lx...",
|
||||
bInfo.Kernel.PhysicalBase,
|
||||
(void *)((uintptr_t)bInfo.Kernel.PhysicalBase + bInfo.Kernel.Size));
|
||||
|
||||
this->ReservePages(bInfo.Kernel.PhysicalBase, TO_PAGES(bInfo.Kernel.Size));
|
||||
|
||||
debug("Reserving kernel file and symbols...");
|
||||
if (bInfo.Kernel.FileBase)
|
||||
this->ReservePages(bInfo.Kernel.FileBase, TO_PAGES(bInfo.Kernel.Size));
|
||||
|
||||
if (bInfo.Kernel.Symbols.Num &&
|
||||
bInfo.Kernel.Symbols.EntSize &&
|
||||
bInfo.Kernel.Symbols.Shndx)
|
||||
{
|
||||
char *sections = r_cst(char *, bInfo.Kernel.Symbols.Sections);
|
||||
debug("Reserving sections region %#lx-%#lx...",
|
||||
sections,
|
||||
(void *)((uintptr_t)sections + bInfo.Kernel.Symbols.EntSize *
|
||||
bInfo.Kernel.Symbols.Num));
|
||||
|
||||
this->ReservePages(sections, TO_PAGES(bInfo.Kernel.Symbols.EntSize *
|
||||
bInfo.Kernel.Symbols.Num));
|
||||
|
||||
Elf_Sym *Symbols = nullptr;
|
||||
uint8_t *StringAddress = nullptr;
|
||||
|
||||
#if defined(a64) || defined(aa64)
|
||||
Elf64_Xword SymbolSize = 0;
|
||||
Elf64_Xword StringSize = 0;
|
||||
#elif defined(a32)
|
||||
Elf32_Word SymbolSize = 0;
|
||||
Elf32_Word StringSize = 0;
|
||||
#endif
|
||||
|
||||
for (size_t i = 0; i < bInfo.Kernel.Symbols.Num; ++i)
|
||||
{
|
||||
Elf_Shdr *sym = (Elf_Shdr *)§ions[bInfo.Kernel.Symbols.EntSize * i];
|
||||
Elf_Shdr *str = (Elf_Shdr *)§ions[bInfo.Kernel.Symbols.EntSize *
|
||||
sym->sh_link];
|
||||
|
||||
if (sym->sh_type == SHT_SYMTAB &&
|
||||
str->sh_type == SHT_STRTAB)
|
||||
{
|
||||
Symbols = (Elf_Sym *)sym->sh_addr;
|
||||
StringAddress = (uint8_t *)str->sh_addr;
|
||||
SymbolSize = (int)sym->sh_size;
|
||||
StringSize = (int)str->sh_size;
|
||||
debug("Symbol table found, %d entries (%ld KiB)",
|
||||
SymbolSize / sym->sh_entsize,
|
||||
TO_KiB(SymbolSize));
|
||||
this->ReservePages(Symbols, TO_PAGES(SymbolSize));
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (Symbols)
|
||||
{
|
||||
debug("Reserving symbol table region %#lx-%#lx...",
|
||||
Symbols, (void *)((uintptr_t)Symbols + SymbolSize));
|
||||
this->ReservePages(Symbols, TO_PAGES(SymbolSize));
|
||||
}
|
||||
|
||||
if (StringAddress)
|
||||
{
|
||||
debug("Reserving string table region %#lx-%#lx...",
|
||||
StringAddress, (void *)((uintptr_t)StringAddress + StringSize));
|
||||
this->ReservePages(StringAddress, TO_PAGES(StringSize));
|
||||
}
|
||||
}
|
||||
|
||||
debug("Reserving kernel modules...");
|
||||
|
||||
for (uint64_t i = 0; i < MAX_MODULES; i++)
|
||||
{
|
||||
if (bInfo.Modules[i].Address == 0x0)
|
||||
continue;
|
||||
|
||||
debug("Reserving module %s (%#lx-%#lx)...", bInfo.Modules[i].CommandLine,
|
||||
bInfo.Modules[i].Address,
|
||||
(void *)((uintptr_t)bInfo.Modules[i].Address + bInfo.Modules[i].Size));
|
||||
|
||||
this->ReservePages((void *)bInfo.Modules[i].Address,
|
||||
TO_PAGES(bInfo.Modules[i].Size));
|
||||
}
|
||||
|
||||
#if defined(a86)
|
||||
if (bInfo.RSDP)
|
||||
{
|
||||
debug("Reserving RSDT region %#lx-%#lx...", bInfo.RSDP,
|
||||
(void *)((uintptr_t)bInfo.RSDP + sizeof(BootInfo::RSDPInfo)));
|
||||
|
||||
this->ReservePages(bInfo.RSDP, TO_PAGES(sizeof(BootInfo::RSDPInfo)));
|
||||
|
||||
ACPI::ACPI::ACPIHeader *ACPIPtr;
|
||||
bool XSDT = false;
|
||||
|
||||
if (bInfo.RSDP->Revision >= 2 && bInfo.RSDP->XSDTAddress)
|
||||
{
|
||||
ACPIPtr = (ACPI::ACPI::ACPIHeader *)bInfo.RSDP->XSDTAddress;
|
||||
XSDT = true;
|
||||
}
|
||||
else
|
||||
ACPIPtr = (ACPI::ACPI::ACPIHeader *)(uintptr_t)bInfo.RSDP->RSDTAddress;
|
||||
|
||||
debug("Reserving RSDT...");
|
||||
this->ReservePages((void *)bInfo.RSDP, TO_PAGES(sizeof(BootInfo::RSDPInfo)));
|
||||
|
||||
if (!Memory::Virtual().Check(ACPIPtr))
|
||||
{
|
||||
error("ACPI table is located in an unmapped region.");
|
||||
return;
|
||||
}
|
||||
|
||||
size_t TableSize = ((ACPIPtr->Length - sizeof(ACPI::ACPI::ACPIHeader)) /
|
||||
(XSDT ? 8 : 4));
|
||||
debug("Reserving %d ACPI tables...", TableSize);
|
||||
|
||||
for (size_t t = 0; t < TableSize; t++)
|
||||
{
|
||||
#pragma GCC diagnostic push
|
||||
#pragma GCC diagnostic ignored "-Wint-to-pointer-cast"
|
||||
// TODO: Should I be concerned about unaligned memory access?
|
||||
ACPI::ACPI::ACPIHeader *SDTHdr = nullptr;
|
||||
if (XSDT)
|
||||
SDTHdr =
|
||||
(ACPI::ACPI::ACPIHeader *)(*(uint64_t *)((uint64_t)ACPIPtr +
|
||||
sizeof(ACPI::ACPI::ACPIHeader) +
|
||||
(t * 8)));
|
||||
else
|
||||
SDTHdr =
|
||||
(ACPI::ACPI::ACPIHeader *)(*(uint32_t *)((uint64_t)ACPIPtr +
|
||||
sizeof(ACPI::ACPI::ACPIHeader) +
|
||||
(t * 4)));
|
||||
#pragma GCC diagnostic pop
|
||||
this->ReservePages(SDTHdr, TO_PAGES(SDTHdr->Length));
|
||||
}
|
||||
}
|
||||
#elif defined(aa64)
|
||||
#endif
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user