2 * GeekOS C code entry point
3 * Copyright (c) 2001,2003,2004 David H. Hovemeyer <daveho@cs.umd.edu>
4 * Copyright (c) 2003, Jeffrey K. Hollingsworth <hollings@cs.umd.edu>
5 * Copyright (c) 2004, Iulian Neamtiu <neamtiu@cs.umd.edu>
8 * This is free software. You are permitted to use,
9 * redistribute, and modify it as specified in the file "COPYING".
12 #include <geekos/bootinfo.h>
13 #include <geekos/string.h>
14 #include <geekos/screen.h>
15 #include <geekos/mem.h>
16 #include <geekos/crc32.h>
17 #include <geekos/tss.h>
18 #include <geekos/int.h>
19 #include <geekos/kthread.h>
20 #include <geekos/trap.h>
21 #include <geekos/timer.h>
22 #include <geekos/keyboard.h>
23 #include <geekos/io.h>
24 #include <geekos/serial.h>
25 #include <geekos/reboot.h>
26 #include <geekos/mem.h>
27 #include <geekos/paging.h>
28 #include <geekos/ide.h>
29 #include <geekos/malloc.h>
31 #include <geekos/debug.h>
32 #include <geekos/vmm.h>
35 #include <geekos/gdt.h>
38 #include <geekos/vmm_stubs.h>
41 #define SPEAKER_PORT 0x61
44 void Buzz(unsigned delay, unsigned num)
50 init=In_Byte(SPEAKER_PORT);
53 Out_Byte(SPEAKER_PORT, init|0x2);
54 for (j=0;j<delay;j++) {
57 Out_Byte(SPEAKER_PORT, init);
58 for (j=0;j<delay;j++) {
64 inline void MyOut_Byte(ushort_t port, uchar_t value)
66 __asm__ __volatile__ (
69 : "a" (value), "Nd" (port)
74 * Read a byte from an I/O port.
76 inline uchar_t MyIn_Byte(ushort_t port)
80 __asm__ __volatile__ (
91 int IO_Read(ushort_t port, void * dst, uint_t length) {
95 for (i = 0; i < length; i++) {
96 *iter = MyIn_Byte(port);
105 int IO_Write(ushort_t port, void * src, uint_t length) {
106 uchar_t * iter = src;
110 for (i = 0; i < length; i++) {
111 MyOut_Byte(port, *iter);
126 __asm__ __volatile__ (
132 PrintBoth("Starting To Buzz\n");
134 init=MyIn_Byte(SPEAKER_PORT);
137 MyOut_Byte(SPEAKER_PORT, init|0x2);
138 for (j=0;j<1000000;j++) {
141 MyOut_Byte(SPEAKER_PORT, init);
142 for (j=0;j<1000000;j++) {
155 void Buzzer(ulong_t arg) {
156 ulong_t *doIBuzz = (ulong_t*)arg;
158 // Quick and dirty hack to save my hearing...
159 // I'm not too worried about timing, so I'll deal with concurrency later...
171 void Keyboard_Listener(ulong_t arg) {
172 ulong_t * doIBuzz = (ulong_t*)arg;
175 Print("Press F4 to turn on/off the speaker\n");
177 while ((key_press = Wait_For_Key())) {
178 if (key_press == KEY_F4) {
179 Print("\nToggling Speaker Port\n");
180 SerialPrintLevel(100,"\nToggling Speaker Port\n");
181 *doIBuzz = (*doIBuzz + 1) % 2;
182 } else if (key_press == KEY_F5) {
183 Print("\nMachine Restart\n");
184 SerialPrintLevel(100,"\nMachine Restart\n");
185 machine_real_restart();
193 extern char BSS_START, BSS_END;
198 /* This is an ugly hack to get at the VM memory */
199 ulong_t vm_range_start;
200 ulong_t vm_range_end;
201 ulong_t guest_kernel_start;
202 ulong_t guest_kernel_end;
206 int AllocateAndMapPagesForRange(uint_t start, uint_t length, pte_t template_pte)
210 for (address=start;address<start+length;address+=PAGE_SIZE) {
212 pte_t pte = template_pte;
217 pte.pageBaseAddr=PAGE_ALLIGNED_ADDR(page);
219 KASSERT(MapPage((void*)address,&pte,1));
228 * Kernel C code entry point.
229 * Initializes kernel subsystems, mounts filesystems,
230 * and spawns init process.
232 void Main(struct Boot_Info* bootInfo)
234 struct Kernel_Thread * key_thread;
235 struct Kernel_Thread * spkr_thread;
257 // Print("Done; stalling\n");
262 SerialPrint("Dumping VM kernel Code (first 128 bytes @ 0x%x)\n", 0x100000);
263 SerialMemDump((unsigned char *)0x100000, 256);
265 SerialPrint("Dumping kernel Code (first 512 bytes @ 0x%x)\n",KERNEL_START);
266 SerialMemDump((unsigned char *)VM_KERNEL_START, 512);
271 SerialPrint("Dumping BIOS code f0000-fffff\n\n");
272 SerialMemDump((unsigned char *)0xf0000, 65536);
274 SerialPrint("Dumping kernel Code (first 512 bytes @ 0x%x)\n",KERNEL_START);
275 SerialMemDump((unsigned char *)VM_KERNEL_START, 512);
280 SerialPrintLevel(1000,"Launching Noisemaker and keyboard listener threads\n");
281 key_thread = Start_Kernel_Thread(Keyboard_Listener, (ulong_t)&doIBuzz, PRIORITY_NORMAL, false);
282 spkr_thread = Start_Kernel_Thread(Buzzer, (ulong_t)&doIBuzz, PRIORITY_NORMAL, false);
287 struct vmm_os_hooks os_hooks;
288 struct vmm_ctrl_ops vmm_ops;
289 struct guest_info vm_info;
293 memset(&os_hooks, 0, sizeof(struct vmm_os_hooks));
294 memset(&vmm_ops, 0, sizeof(struct vmm_ctrl_ops));
295 memset(&vm_info, 0, sizeof(struct guest_info));
297 os_hooks.print_debug = &PrintBoth;
298 os_hooks.print_info = &Print;
299 os_hooks.print_trace = &SerialPrint;
300 os_hooks.allocate_pages = &Allocate_VMM_Pages;
301 os_hooks.free_page = &Free_VMM_Page;
302 os_hooks.malloc = &VMM_Malloc;
303 os_hooks.free = &VMM_Free;
304 os_hooks.vaddr_to_paddr = &Identity;
305 os_hooks.paddr_to_vaddr = &Identity;
309 Init_VMM(&os_hooks, &vmm_ops);
311 init_shadow_map(&(vm_info.mem_map));
312 init_shadow_page_state(&(vm_info.shdw_pg_state));
313 vm_info.page_mode = SHADOW_PAGING;
315 vm_info.cpu_mode = REAL;
317 init_vmm_io_map(&(vm_info.io_map));
322 // add_shared_mem_range(&(vm_info.mem_layout), 0, 0x800000, 0x10000);
323 // add_shared_mem_range(&(vm_info.mem_layout), 0, 0x1000000, 0);
325 rip = (ulong_t)(void*)&BuzzVM;
327 // rip = (addr_t)(void*)&exit_test;
330 rsp = (addr_t)Alloc_Page();
332 vm_info.vm_regs.rsp = (rsp +4092 );// - 0x2000;
336 //add_shared_mem_range(&(vm_info.mem_layout), 0x0, 0x1000, 0x100000);
337 // add_shared_mem_range(&(vm_info.mem_layout), 0x0, 0x100000, 0x0);
339 shadow_region_t *ent = Malloc(sizeof(shadow_region_t));;
340 init_shadow_region_physical(ent,0,0x100000,GUEST_REGION_PHYSICAL_MEMORY,
341 0x100000, HOST_REGION_PHYSICAL_MEMORY);
342 add_shadow_region(&(vm_info.mem_map),ent);
344 hook_io_port(&(vm_info.io_map), 0x61, &IO_Read, &IO_Write);
347 vm_info.cs.base=0xf000;
348 vm_info.cs.limit=0xffff;
350 //vm_info.rip = 0xfff0;
353 vm_info.vm_regs.rsp = 0x0;
356 PrintBoth("Initializing Guest (eip=0x%.8x) (esp=0x%.8x)\n", (uint_t)vm_info.rip,(uint_t)vm_info.vm_regs.rsp);
357 (vmm_ops).init_guest(&vm_info);
358 PrintBoth("Starting Guest\n");
359 (vmm_ops).start_guest(&vm_info);
366 TODO("Write a Virtual Machine Monitor");