140 lines
6.0 KiB
C
140 lines
6.0 KiB
C
//----------------------------------------------------------------------------//
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// GNU GPL OS/K //
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// //
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// Desc: Kernel entry point //
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// //
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// //
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// Copyright © 2018-2019 The OS/K Team //
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// //
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// This file is part of OS/K. //
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// //
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// OS/K is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 3 of the License, or //
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// any later version. //
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// //
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// OS/K is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY//without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
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//----------------------------------------------------------------------------//
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#include <kernel/multiboot.h>
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#include <kernel/term.h>
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#include <kernel/panic.h>
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#include <kernel/mm.h>
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//
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// BootInfo_t initialization. It is necessary because grub will potentially be
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// wiped since it is below 1MB.... And we must reorganize all that stuff.
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//
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void InitBootInfo(multiboot_info_t *mbi)
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{
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extern uint MB_header;
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char okStr[] = "available";
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char noStr[] = "unavailable";
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// We need the multiboot structure
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KalAlwaysAssert(mbi);
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//Retrieves the bootloader flags to ensure infos are valid
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GetBootInfo(btldr).grubFlags = mbi->flags;
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if (GetBootInfo(btldr).grubFlags & MULTIBOOT_INFO_BOOT_LOADER_NAME) {
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GetBootInfo(btldr).grubName = (char*)(ullong)(mbi->boot_loader_name);
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GetBootInfo(btldr).mbHeaderAddr = (void*)(ullong)&MB_header;
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GetBootInfo(btldr).valid = 1;
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}
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if (GetBootInfo(btldr).grubFlags & MULTIBOOT_INFO_MODS) {
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GetBootInfo(btldr).modulesCount = mbi->mods_count;
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GetBootInfo(btldr).modulesAddr = (void*)(ullong)mbi->mods_addr;
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}
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//Retrieves the drives informations
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if (GetBootInfo(btldr).grubFlags & MULTIBOOT_INFO_DRIVE_INFO) {
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GetBootInfo(drives).bufferLength = mbi->drives_length;
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GetBootInfo(drives).bufferAddr = (void*)(ullong)mbi->drives_addr;
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GetBootInfo(drives).bufferValid = 1;
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}
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if (GetBootInfo(btldr).grubFlags & MULTIBOOT_INFO_BOOTDEV) {
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GetBootInfo(drives).bootDrv = mbi->boot_device;
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GetBootInfo(drives).drvValid = 1;
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}
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//Retrieves the memory informations
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if (GetBootInfo(btldr).grubFlags & MULTIBOOT_INFO_MEMORY) {
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GetBootInfo(memory).lowMemory = mbi->mem_lower;
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GetBootInfo(memory).upMemory = mbi->mem_upper;
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GetBootInfo(memory).memValid = 1;
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}
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if (GetBootInfo(btldr).grubFlags & MULTIBOOT_INFO_MEM_MAP) {
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GetBootInfo(memory).mapAddr = (void*)(ullong)mbi->mmap_addr;
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GetBootInfo(memory).mapLength = mbi->mmap_length;
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GetBootInfo(memory).mapValid = 1;
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}
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// XXX assign video infos, but unused at this time
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// Retrieves the firmware infos
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if (GetBootInfo(btldr).grubFlags & MULTIBOOT_INFO_CONFIG_TABLE) {
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GetBootInfo(firmware).romTable = mbi->config_table;
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GetBootInfo(firmware).romValid = 1;
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}
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if (GetBootInfo(btldr).grubFlags & MULTIBOOT_INFO_APM_TABLE) {
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GetBootInfo(firmware).apmTable = mbi->apm_table;
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GetBootInfo(firmware).apmValid = 1;
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}
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//Now we check (debug)
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DebugLog("\n[InitBootInfo] Flags : %b",
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GetBootInfo(btldr).grubFlags);
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DebugLog("\n[InitBootInfo] Boot loader %s",
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GetBootInfo(btldr).valid ? &okStr : &noStr);
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DebugLog("\n[InitBootInfo] Boot drive %s",
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GetBootInfo(drives).drvValid ? &okStr : &noStr);
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DebugLog("\n[InitBootInfo] Disk buffer %s",
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GetBootInfo(drives).bufferValid ? &okStr : &noStr);
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DebugLog("\n[InitBootInfo] Basic mem %s",
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GetBootInfo(memory).memValid ? &okStr : &noStr);
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DebugLog("\n[InitBootInfo] Memory map %s",
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GetBootInfo(memory).mapValid ? &okStr : &noStr);
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DebugLog("\n[InitBootInfo] ROM table %s",
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GetBootInfo(firmware).romValid ? &okStr : &noStr);
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DebugLog("\n[InitBootInfo] APM table %s",
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GetBootInfo(firmware).apmValid ? &okStr : &noStr);
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DebugLog("\n");
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}
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//
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// Entry point of the Kaleid kernel
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//
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noreturn void StartKern(multiboot_info_t *mbInfo, int mbMagic)
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{
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// We're not ready to deal with interrupts
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DisableIRQs();
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// Kernel terminals
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InitTerms();
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//Hello world because why not
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KernLog("%c%c%c OS/K\n\n", 219, 219, 219);
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KalAlwaysAssert(mbMagic == MULTIBOOT_BOOTLOADER_MAGIC);
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KernLog("[Init] We have magic : %x\n", mbMagic);
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//Initialize the BootInfo_t structure
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InitBootInfo(mbInfo);
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//Memory mapping
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error_t mapBad = InitMemoryMap();
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if (mapBad)
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StartPanic("[Init] The memory map failed to initialize. Error : %d", mapBad);
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// We're out
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KernLog("\n[Init] Evil never dies !");
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CrashSystem(); //yay
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}
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