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);
120 int IO_Write_to_Serial(ushort_t port, void * src, uint_t length) {
121 PrintBoth("Output from Guest on port %d (0x%x) Length=%d\n", port, port, length);
125 PrintBoth(">0x%.2x\n", *(char*)src);
128 PrintBoth(">0x%.4x\n", *(ushort_t*)src);
131 PrintBoth(">0x%.8x\n", *(uint_t*)src);
137 // SerialMemDump(src, length);
149 __asm__ __volatile__ (
155 PrintBoth("Starting To Buzz\n");
157 init=MyIn_Byte(SPEAKER_PORT);
160 MyOut_Byte(SPEAKER_PORT, init|0x2);
161 for (j=0;j<1000000;j++) {
164 MyOut_Byte(SPEAKER_PORT, init);
165 for (j=0;j<1000000;j++) {
178 void Buzzer(ulong_t arg) {
179 ulong_t *doIBuzz = (ulong_t*)arg;
181 // Quick and dirty hack to save my hearing...
182 // I'm not too worried about timing, so I'll deal with concurrency later...
194 void Keyboard_Listener(ulong_t arg) {
195 ulong_t * doIBuzz = (ulong_t*)arg;
198 Print("Press F4 to turn on/off the speaker\n");
200 while ((key_press = Wait_For_Key())) {
201 if (key_press == KEY_F4) {
202 Print("\nToggling Speaker Port\n");
203 SerialPrintLevel(100,"\nToggling Speaker Port\n");
204 *doIBuzz = (*doIBuzz + 1) % 2;
205 } else if (key_press == KEY_F5) {
206 Print("\nMachine Restart\n");
207 SerialPrintLevel(100,"\nMachine Restart\n");
208 machine_real_restart();
216 extern char BSS_START, BSS_END;
221 /* This is an ugly hack to get at the VM memory */
222 ulong_t vm_range_start;
223 ulong_t vm_range_end;
224 ulong_t guest_kernel_start;
225 ulong_t guest_kernel_end;
229 int AllocateAndMapPagesForRange(uint_t start, uint_t length, pte_t template_pte)
233 for (address=start;address<start+length;address+=PAGE_SIZE) {
235 pte_t pte = template_pte;
240 pte.pageBaseAddr=PAGE_ALLIGNED_ADDR(page);
242 KASSERT(MapPage((void*)address,&pte,1));
251 * Kernel C code entry point.
252 * Initializes kernel subsystems, mounts filesystems,
253 * and spawns init process.
255 void Main(struct Boot_Info* bootInfo)
257 struct Kernel_Thread * key_thread;
258 struct Kernel_Thread * spkr_thread;
280 // Print("Done; stalling\n");
285 SerialPrint("Dumping VM kernel Code (first 128 bytes @ 0x%x)\n", 0x100000);
286 SerialMemDump((unsigned char *)0x100000, 256);
288 SerialPrint("Dumping kernel Code (first 512 bytes @ 0x%x)\n",KERNEL_START);
289 SerialMemDump((unsigned char *)VM_KERNEL_START, 512);
294 SerialPrint("Dumping BIOS code f0000-fffff\n\n");
295 SerialMemDump((unsigned char *)0xf0000, 65536);
297 SerialPrint("Dumping kernel Code (first 512 bytes @ 0x%x)\n",KERNEL_START);
298 SerialMemDump((unsigned char *)VM_KERNEL_START, 512);
303 SerialPrintLevel(1000,"Launching Noisemaker and keyboard listener threads\n");
304 key_thread = Start_Kernel_Thread(Keyboard_Listener, (ulong_t)&doIBuzz, PRIORITY_NORMAL, false);
305 spkr_thread = Start_Kernel_Thread(Buzzer, (ulong_t)&doIBuzz, PRIORITY_NORMAL, false);
310 struct vmm_os_hooks os_hooks;
311 struct vmm_ctrl_ops vmm_ops;
312 struct guest_info vm_info;
316 memset(&os_hooks, 0, sizeof(struct vmm_os_hooks));
317 memset(&vmm_ops, 0, sizeof(struct vmm_ctrl_ops));
318 memset(&vm_info, 0, sizeof(struct guest_info));
320 os_hooks.print_debug = &PrintBoth;
321 os_hooks.print_info = &Print;
322 os_hooks.print_trace = &SerialPrint;
323 os_hooks.allocate_pages = &Allocate_VMM_Pages;
324 os_hooks.free_page = &Free_VMM_Page;
325 os_hooks.malloc = &VMM_Malloc;
326 os_hooks.free = &VMM_Free;
327 os_hooks.vaddr_to_paddr = &Identity;
328 os_hooks.paddr_to_vaddr = &Identity;
332 Init_VMM(&os_hooks, &vmm_ops);
334 init_shadow_map(&(vm_info.mem_map));
335 init_shadow_page_state(&(vm_info.shdw_pg_state));
336 vm_info.page_mode = SHADOW_PAGING;
338 vm_info.cpu_mode = REAL;
340 init_vmm_io_map(&(vm_info.io_map));
345 // add_shared_mem_range(&(vm_info.mem_layout), 0, 0x800000, 0x10000);
346 // add_shared_mem_range(&(vm_info.mem_layout), 0, 0x1000000, 0);
348 rip = (ulong_t)(void*)&BuzzVM;
350 // rip = (addr_t)(void*)&exit_test;
353 rsp = (addr_t)Alloc_Page();
355 vm_info.vm_regs.rsp = (rsp +4092 );// - 0x2000;
359 //add_shared_mem_range(&(vm_info.mem_layout), 0x0, 0x1000, 0x100000);
360 // add_shared_mem_range(&(vm_info.mem_layout), 0x0, 0x100000, 0x0);
362 shadow_region_t *ent = Malloc(sizeof(shadow_region_t));;
363 init_shadow_region_physical(ent,0,0x100000,GUEST_REGION_PHYSICAL_MEMORY,
364 0x100000, HOST_REGION_PHYSICAL_MEMORY);
365 add_shadow_region(&(vm_info.mem_map),ent);
367 hook_io_port(&(vm_info.io_map), 0x61, &IO_Read, &IO_Write);
368 hook_io_port(&(vm_info.io_map), 0x05, &IO_Read, &IO_Write_to_Serial);
372 vm_info.cs.base=0xf000;
373 vm_info.cs.limit=0xffff;
375 //vm_info.rip = 0xfff0;
378 vm_info.vm_regs.rsp = 0x0;
381 PrintBoth("Initializing Guest (eip=0x%.8x) (esp=0x%.8x)\n", (uint_t)vm_info.rip,(uint_t)vm_info.vm_regs.rsp);
382 (vmm_ops).init_guest(&vm_info);
383 PrintBoth("Starting Guest\n");
384 (vmm_ops).start_guest(&vm_info);
391 TODO("Write a Virtual Machine Monitor");