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#include <types.h>
#include <config.h>
#include "multiboot.h"
#include "sys.h"
#include <mem/gdt.h>
#include <mem/paging.h>
#include <mem/mem.h>
#include <vfs/node.h>
#include <vfs/initrd.h>
#include <task/idt.h>
#include <task/timer.h>
#include <task/task.h>
#include <linker/elf.h>
#include <ui/vt.h>
#include <dev/vgatxt.h>
#include <dev/ps2keyboard.h>
/* The kernel's main procedure. This function is called in loader_.asm.
This function calls the initializer functions for all system parts.
It then loads the modules the kernel was given by the bootloader.
This function never returns : once multitasking is started for good,
the execution flow of this function is never returned to. */
extern "C" void kmain(multiboot_info_t* mbd, int32_t magic) {
ASSERT(magic == MULTIBOOT_BOOTLOADER_MAGIC);
mem_placementAddr = ((size_t)&end & 0xFFFFF000) + 0x1000;
mbd->cmdline += K_HIGHHALF_ADDR; mbd->mods_addr += K_HIGHHALF_ADDR;
module_t *mods = (module_t*)mbd->mods_addr;
for (unsigned i = 0; i < mbd->mods_count; i++) {
mods[i].mod_start += K_HIGHHALF_ADDR;
mods[i].mod_end += K_HIGHHALF_ADDR;
mods[i].string += K_HIGHHALF_ADDR;
if (mods[i].mod_end > mem_placementAddr)
mem_placementAddr = (mods[i].mod_end & 0xFFFFF000) + 0x1000;
}
// Init memory managment functions
idt_init();
size_t totalRam = ((mbd->mem_upper + mbd->mem_lower) * 1024);
paging_init(totalRam);
gdt_init();
paging_cleanup();
_no_more_ksbrk = true;
// Init higher level stuff
timer_init(100);
tasking_init();
vfs_setup();
// Init display devices
text_display = new vgatxt(dot_dev);
dot_dev->add_child("vgatxt", text_display);
ke_vt = new vt(dot_ui, 80, 25);
dot_ui->add_child("klog", ke_vt);
ke_vt->outputTo(text_display);
home_vt = new vt(dot_ui, 80, 25);
dot_ui->add_child("home", home_vt);
dot_ui->add_child("vt1", new vt(dot_ui, 80, 25));
dot_ui->add_child("vt2", new vt(dot_ui, 80, 25));
dot_ui->add_child("vt3", new vt(dot_ui, 80, 25));
dot_ui->add_child("vt4", new vt(dot_ui, 80, 25));
// Say hello
ke_vt->fgcolor = TC_LIGHTGRAY;
*ke_vt << "Hello. This is ";
ke_vt->fgcolor = TC_WHITE; *ke_vt << K_OS_NAME;
ke_vt->fgcolor = TC_LIGHTGRAY; *ke_vt << " version ";
ke_vt->fgcolor = TC_WHITE; *ke_vt << K_OS_VER;
ke_vt->fgcolor = TC_LIGHTGRAY; *ke_vt << " codename '";
ke_vt->fgcolor = TC_WHITE; *ke_vt << K_OS_CODENAME;
ke_vt->fgcolor = TC_LIGHTGRAY; *ke_vt << "'. Enjoy!\n";
// Init devices
kbd = new ps2kbd(dot_dev);
dot_dev->add_child("ps2kbd", kbd);
kbd->outputTo(ke_vt);
// Load modules
*ke_vt << "Loading modules :\n";
for (unsigned i = 0; i < mbd->mods_count; i++) {
char* cmd = (char*)mods[i].string;
*ke_vt << " * " << cmd << " \t";
if (elf_check((uint8_t*)mods[i].mod_start) == 0) {
char *args[16] = { cmd, 0 };
int a = 1;
for (char* c = cmd; c != 0; c++) {
if (*c == ' ') {
*c = 0;
args[a] = c + 1;
a++;
if (a == 15) {
args[a] = 0;
break;
}
} else if (*c == 0) {
args[a] = 0;
break;
}
}
process *pr = elf_exec((uint8_t*)mods[i].mod_start, PL_USER, args); // todo add args
if (pr == 0) {
*ke_vt << "Error loading\n";
} else {
pr->fd.set(0, ke_vt);
*ke_vt << "OK, pid=" << (int)pr->pid << "\n";
}
} else if (initrd_check((uint8_t*)mods[i].mod_start) == 0) {
vdir* fs = new vdir(root);
int e = initrd_load((uint8_t*)mods[i].mod_start, fs);
if (e == 0) {
char* name = cmd;
for (char* i = name; *i != 0; i++) {
if (*i == '/' || *i == ' ') name = i + 1;
}
root->add_child(name, fs);
*ke_vt << "OK, initrd as /" << name << "/\n";
} else {
*ke_vt << "initrd but error " << e << "\n";
}
} else {
*ke_vt << "Invalid file, neither ELF nor initrd.\n";
}
}
*ke_vt << "Giving control to userland processes.\n\n";
sti();
schedule();
PANIC("Should never happen. Something probably went wrong with multitasking.");
}
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