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Import the "gerbert" kernel I worked on earlier this year.

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It's a lot crappier than I remembered it. It's gonna need a lot of work.
This commit is contained in:
Andreas Kling 2018-10-16 11:01:38 +02:00
parent f608629704
commit 9396108034
55 changed files with 4600 additions and 0 deletions
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135
Kernel/init.cpp Normal file
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#include "types.h"
#include "VGA.h"
#include "kmalloc.h"
#include "i386.h"
#include "i8253.h"
#include "Keyboard.h"
#include "Task.h"
#include "IPC.h"
#include "system.h"
#include "Disk.h"
#include "PIC.h"
#include "StdLib.h"
#include "Syscall.h"
#include "CMOS.h"
#include "FileSystem.h"
#include "Userspace.h"
#if 0
/* Keyboard LED disco task ;^) */
static void led_disco() NORETURN;
static void led_disco()
{
BYTE b = 0;
for (;;) {
sleep(0.5 * TICKS_PER_SECOND);
Keyboard::unsetLED((Keyboard::LED)b++);
b &= 7;
Keyboard::setLED((Keyboard::LED)b);
}
}
#endif
static void motd_main() NORETURN;
static void motd_main()
{
kprintf("Hello in motd_main!\n");
int fd = Userspace::open("/test.asm");
kprintf("motd: fd=%d\n", fd);
ASSERT(fd != -1);
DO_SYSCALL_A3(0x2000, 1, 2, 3);
kprintf("getuid(): %u\n", Userspace::getuid());
auto buffer = DataBuffer::createUninitialized(33);
memset(buffer->data(), 0, buffer->length());
int nread = Userspace::read(fd, buffer->data(), buffer->length() - 1);
kprintf("read(): %d\n", nread);
buffer->data()[nread] = 0;
kprintf("read(): '%s'\n", buffer->data());
for (;;) {
//kill(4, 5);
sleep(1 * TICKS_PER_SECOND);
}
}
static void user_main() NORETURN;
static void user_main()
{
DO_SYSCALL_A3(0x3000, 2, 3, 4);
// Crash ourselves!
char* x = reinterpret_cast<char*>(0xbeefbabe);
*x = 1;
//HANG;
for (;;) {
// nothing?
Userspace::sleep(1 * TICKS_PER_SECOND);
}
}
system_t system;
void banner()
{
kprintf("\n");
vga_set_attr(0x0a);
kprintf(" _____ _ _ \n");
vga_set_attr(0x0b);
kprintf("| __|___ ___| |_ ___ ___| |_ \n");
vga_set_attr(0x0c);
kprintf("| | | -_| _| . | -_| _| _|\n");
vga_set_attr(0x0d);
kprintf("|_____|___|_| |___|___|_| |_| \n");
vga_set_attr(0x07);
kprintf("\n");
}
void init()
{
disableInterrupts();
kmalloc_init();
vga_init();
PIC::initialize();
gdt_init();
idt_init();
// Anything that registers interrupts goes *after* PIC and IDT for obvious reasons.
Syscall::initialize();
PIT::initialize();
Keyboard::initialize();
Task::initialize();
memset(&system, 0, sizeof(system));
WORD base_memory = (CMOS::read(0x16) << 8) | CMOS::read(0x15);
WORD ext_memory = (CMOS::read(0x18) << 8) | CMOS::read(0x17);
kprintf("%u kB base memory\n", base_memory);
kprintf("%u kB extended memory\n", ext_memory);
extern void panel_main();
new Task(0, "KernelTask", IPC::Handle::Any, Task::Ring0);
new Task(panel_main, "panel", IPC::Handle::PanelTask, Task::Ring0);
//new Task(led_disco, "led-disco", IPC::Handle::Any, Task::Ring0);
sched();
enableInterrupts();
banner();
Disk::initialize();
FileSystem::initialize();
// new Task(motd_main, "motd", IPC::Handle::MotdTask, Task::Ring0);
new Task(user_main, "user", IPC::Handle::UserTask, Task::Ring3);
// The idle task will spend its eternity here for now.
for (;;) {
asm("hlt");
}
}