118 lines
5.5 KiB
C
118 lines
5.5 KiB
C
//----------------------------------------------------------------------------//
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// OS on Kaleid //
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// //
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// Desc: Initialization of boot info //
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// //
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// //
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// Copyright © 2018-2020 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 <init/boot.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 BtInitBootInfo(multiboot_info_t *mbi, void *codeSeg)
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{
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extern ulong BtHeader;
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extern ulong newKernelEnd;
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extern ulong newStackEnd;
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// We need the multiboot structure
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assert_always(mbi);
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// Retrieves the bootloader flags to ensure infos are valid
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BtLoaderInfo.grubFlags = mbi->flags;
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if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_BOOT_LOADER_NAME) {
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BtLoaderInfo.grubName = (char*)(ulong)(mbi->boot_loader_name);
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BtLoaderInfo.kernelAddr = (void*)&BtHeader;
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BtLoaderInfo.kernelEndAddr = (void*)newKernelEnd;
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BtLoaderInfo.stackEndAddr = (void*)newStackEnd;
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BtLoaderInfo.codeSegment = codeSeg;
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BtLoaderInfo.valid = 1;
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}
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if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_MODS) {
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BtLoaderInfo.modulesCount = mbi->mods_count;
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BtLoaderInfo.modulesAddr = (void*)(ulong)mbi->mods_addr;
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}
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// Retrieves the drives informations
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if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_DRIVE_INFO) {
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BtBootTab.drives.bufferLength = mbi->drives_length;
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BtBootTab.drives.bufferAddr = (void*)(ulong)mbi->drives_addr;
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BtBootTab.drives.bufferValid = 1;
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}
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if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_BOOTDEV) {
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BtBootTab.drives.bootDrv = mbi->boot_device;
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BtBootTab.drives.drvValid = 1;
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}
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// Retrieves the memory informations
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if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_MEMORY) {
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BtMemoryInfo.lowMemory = mbi->mem_lower;
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BtMemoryInfo.upMemory = mbi->mem_upper;
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BtMemoryInfo.memValid = 1;
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}
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if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_MEM_MAP) {
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BtMemoryInfo.mapAddr = (void*)(ulong)mbi->mmap_addr;
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BtMemoryInfo.mapLength = mbi->mmap_length;
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BtMemoryInfo.mapValid = 1;
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}
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// Retrieves video mode informations
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if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_VBE_INFO) {
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BtVideoInfo.vbeControl = (void*)(ulong)mbi->vbe_control_info;
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BtVideoInfo.vbeModeInfo = (void*)(ulong)mbi->vbe_mode_info;
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BtVideoInfo.vbeMode = mbi->vbe_mode;
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BtVideoInfo.vbeInterfaceSeg = mbi->vbe_interface_seg;
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BtVideoInfo.vbeInterfaceOff = mbi->vbe_interface_off;
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BtVideoInfo.vbeInterfaceLen = mbi->vbe_interface_len;
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BtVideoInfo.vbeValid = 1;
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}
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if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_FRAMEBUFFER_INFO) {
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BtVideoInfo.framebufferAddr = (void*)mbi->framebuffer_addr;
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BtVideoInfo.framebufferPitch = mbi->framebuffer_pitch;
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BtVideoInfo.framebufferWidth = mbi->framebuffer_width;
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BtVideoInfo.framebufferHeight= mbi->framebuffer_height;
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BtVideoInfo.framebufferBpp = mbi->framebuffer_bpp;
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BtVideoInfo.framebufferType = mbi->framebuffer_type;
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BtVideoInfo.fbuValid = 1;
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}
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// Retrieves the firmware infos
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if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_CONFIG_TABLE) {
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BtFirmwareInfo.romTable = mbi->config_table;
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BtFirmwareInfo.romValid = 1;
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}
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if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_APM_TABLE) {
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BtFirmwareInfo.apmTable = mbi->apm_table;
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BtFirmwareInfo.apmValid = 1;
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}
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}
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void BtDoSanityChecks(uint mbMagic) {
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if (!(mbMagic == MULTIBOOT_BOOTLOADER_MAGIC))
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KeStartPanic("Magic number %x is incorrect\n", mbMagic);
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DebugLog("Kernel successfully loaded at %p\n",
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BtLoaderInfo.kernelAddr);
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}
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