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os-k/kaleid/kernel/init/info.c

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//----------------------------------------------------------------------------//
// GNU GPL OS/K //
// //
// Desc: Initialization of boot info //
// //
// //
// Copyright © 2018-2019 The OS/K Team //
// //
// This file is part of OS/K. //
// //
// OS/K 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 //
// any later version. //
// //
// OS/K 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 OS/K. If not, see <https://www.gnu.org/licenses/>. //
//----------------------------------------------------------------------------//
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#include <init/boot.h>
#include <init/mboot.h>
//
// BootInfo_t initialization. It is necessary because grub will potentially be
// wiped since it is below 1MB.... And we must reorganize all that stuff.
//
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void BtInitBootInfo(multiboot_info_t *mbi, void *codeSeg)
{
extern ulong MB_header;
extern ulong newKernelEnd;
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extern ulong newStackEnd;
// 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
BtLoaderInfo.grubFlags = mbi->flags;
if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_BOOT_LOADER_NAME) {
BtLoaderInfo.grubName = (char*)(ulong)(mbi->boot_loader_name);
BtLoaderInfo.kernelAddr = (void*)&MB_header;
BtLoaderInfo.kernelEndAddr = (void*)newKernelEnd;
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BtLoaderInfo.stackEndAddr = (void*)newStackEnd;
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BtLoaderInfo.codeSegment = codeSeg;
BtLoaderInfo.valid = 1;
}
if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_MODS) {
BtLoaderInfo.modulesCount = mbi->mods_count;
BtLoaderInfo.modulesAddr = (void*)(ulong)mbi->mods_addr;
}
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// Retrieves the drives informations
if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_DRIVE_INFO) {
BtBootTab.drives.bufferLength = mbi->drives_length;
BtBootTab.drives.bufferAddr = (void*)(ulong)mbi->drives_addr;
BtBootTab.drives.bufferValid = 1;
}
if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_BOOTDEV) {
BtBootTab.drives.bootDrv = mbi->boot_device;
BtBootTab.drives.drvValid = 1;
}
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// Retrieves the memory informations
if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_MEMORY) {
BtMemoryInfo.lowMemory = mbi->mem_lower;
BtMemoryInfo.upMemory = mbi->mem_upper;
BtMemoryInfo.memValid = 1;
}
if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_MEM_MAP) {
BtMemoryInfo.mapAddr = (void*)(ulong)mbi->mmap_addr;
BtMemoryInfo.mapLength = mbi->mmap_length;
BtMemoryInfo.mapValid = 1;
}
// Retrieves video mode informations
if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_VBE_INFO) {
BtVideoInfo.vbeControl = (void*)(ulong)mbi->vbe_control_info;
BtVideoInfo.vbeModeInfo = (void*)(ulong)mbi->vbe_mode_info;
BtVideoInfo.vbeMode = mbi->vbe_mode;
BtVideoInfo.vbeInterfaceSeg = mbi->vbe_interface_seg;
BtVideoInfo.vbeInterfaceOff = mbi->vbe_interface_off;
BtVideoInfo.vbeInterfaceLen = mbi->vbe_interface_len;
BtVideoInfo.vbeValid = 1;
}
if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_FRAMEBUFFER_INFO) {
BtVideoInfo.framebufferAddr = (void*)mbi->framebuffer_addr;
BtVideoInfo.framebufferPitch = mbi->framebuffer_pitch;
BtVideoInfo.framebufferWidth = mbi->framebuffer_width;
BtVideoInfo.framebufferHeight= mbi->framebuffer_height;
BtVideoInfo.framebufferBpp = mbi->framebuffer_bpp;
BtVideoInfo.framebufferType = mbi->framebuffer_type;
BtVideoInfo.fbuValid = 1;
}
// Retrieves the firmware infos
if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_CONFIG_TABLE) {
BtFirmwareInfo.romTable = mbi->config_table;
BtFirmwareInfo.romValid = 1;
}
if (BtLoaderInfo.grubFlags & MULTIBOOT_INFO_APM_TABLE) {
BtFirmwareInfo.apmTable = mbi->apm_table;
BtFirmwareInfo.apmValid = 1;
}
}
void BtDoSanityChecks(uint mbMagic) {
uint tmp;
if (!(mbMagic == MULTIBOOT_BOOTLOADER_MAGIC))
KeStartPanic("[Init] Magic number %x is incorrect\n", mbMagic);
tmp = (BtLoaderInfo.kernelEndAddr
- BtLoaderInfo.kernelAddr) / KB;
DebugLog("[Init] Kernel successfully loaded at %p with %x magic\n"
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" and it uses %dKB\n\n",
BtLoaderInfo.kernelAddr,
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mbMagic, tmp);
}