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, uint_t io_width) {
95 for (i = 0; i < length; i++) {
96 *iter = MyIn_Byte(port);
105 int IO_Write(ushort_t port, void * src, uint_t length, uint_t io_width) {
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, uint_t io_width) {
121 SerialPrint("Output from Guest on port %d (0x%x) Length=%d\n", port, port, length);
122 SerialMemDump(src, length);
134 __asm__ __volatile__ (
140 PrintBoth("Starting To Buzz\n");
142 init=MyIn_Byte(SPEAKER_PORT);
145 MyOut_Byte(SPEAKER_PORT, init|0x2);
146 for (j=0;j<1000000;j++) {
149 MyOut_Byte(SPEAKER_PORT, init);
150 for (j=0;j<1000000;j++) {
163 void Buzzer(ulong_t arg) {
164 ulong_t *doIBuzz = (ulong_t*)arg;
166 // Quick and dirty hack to save my hearing...
167 // I'm not too worried about timing, so I'll deal with concurrency later...
179 void Keyboard_Listener(ulong_t arg) {
180 ulong_t * doIBuzz = (ulong_t*)arg;
183 Print("Press F4 to turn on/off the speaker\n");
185 while ((key_press = Wait_For_Key())) {
186 if (key_press == KEY_F4) {
187 Print("\nToggling Speaker Port\n");
188 SerialPrintLevel(100,"\nToggling Speaker Port\n");
189 *doIBuzz = (*doIBuzz + 1) % 2;
190 } else if (key_press == KEY_F5) {
191 Print("\nMachine Restart\n");
192 SerialPrintLevel(100,"\nMachine Restart\n");
193 machine_real_restart();
201 extern char BSS_START, BSS_END;
206 /* This is an ugly hack to get at the VM memory */
207 ulong_t vm_range_start;
208 ulong_t vm_range_end;
209 ulong_t guest_kernel_start;
210 ulong_t guest_kernel_end;
214 int AllocateAndMapPagesForRange(uint_t start, uint_t length, pte_t template_pte)
218 for (address=start;address<start+length;address+=PAGE_SIZE) {
220 pte_t pte = template_pte;
225 pte.pageBaseAddr=PAGE_ALLIGNED_ADDR(page);
227 KASSERT(MapPage((void*)address,&pte,1));
236 * Kernel C code entry point.
237 * Initializes kernel subsystems, mounts filesystems,
238 * and spawns init process.
240 void Main(struct Boot_Info* bootInfo)
242 struct Kernel_Thread * key_thread;
243 struct Kernel_Thread * spkr_thread;
265 // Print("Done; stalling\n");
270 SerialPrint("Dumping VM kernel Code (first 128 bytes @ 0x%x)\n", 0x100000);
271 SerialMemDump((unsigned char *)0x100000, 256);
273 SerialPrint("Dumping kernel Code (first 512 bytes @ 0x%x)\n",KERNEL_START);
274 SerialMemDump((unsigned char *)VM_KERNEL_START, 512);
279 SerialPrint("Dumping BIOS code f0000-fffff\n\n");
280 SerialMemDump((unsigned char *)0xf0000, 65536);
282 SerialPrint("Dumping kernel Code (first 512 bytes @ 0x%x)\n",KERNEL_START);
283 SerialMemDump((unsigned char *)VM_KERNEL_START, 512);
288 SerialPrintLevel(1000,"Launching Noisemaker and keyboard listener threads\n");
289 key_thread = Start_Kernel_Thread(Keyboard_Listener, (ulong_t)&doIBuzz, PRIORITY_NORMAL, false);
290 spkr_thread = Start_Kernel_Thread(Buzzer, (ulong_t)&doIBuzz, PRIORITY_NORMAL, false);
295 struct vmm_os_hooks os_hooks;
296 struct vmm_ctrl_ops vmm_ops;
297 struct guest_info vm_info;
301 memset(&os_hooks, 0, sizeof(struct vmm_os_hooks));
302 memset(&vmm_ops, 0, sizeof(struct vmm_ctrl_ops));
303 memset(&vm_info, 0, sizeof(struct guest_info));
305 os_hooks.print_debug = &PrintBoth;
306 os_hooks.print_info = &Print;
307 os_hooks.print_trace = &SerialPrint;
308 os_hooks.allocate_pages = &Allocate_VMM_Pages;
309 os_hooks.free_page = &Free_VMM_Page;
310 os_hooks.malloc = &VMM_Malloc;
311 os_hooks.free = &VMM_Free;
312 os_hooks.vaddr_to_paddr = &Identity;
313 os_hooks.paddr_to_vaddr = &Identity;
317 Init_VMM(&os_hooks, &vmm_ops);
319 init_shadow_map(&(vm_info.mem_map));
320 init_shadow_page_state(&(vm_info.shdw_pg_state));
321 vm_info.page_mode = SHADOW_PAGING;
323 vm_info.cpu_mode = REAL;
325 init_vmm_io_map(&(vm_info.io_map));
330 // add_shared_mem_range(&(vm_info.mem_layout), 0, 0x800000, 0x10000);
331 // add_shared_mem_range(&(vm_info.mem_layout), 0, 0x1000000, 0);
333 rip = (ulong_t)(void*)&BuzzVM;
335 // rip = (addr_t)(void*)&exit_test;
338 rsp = (addr_t)Alloc_Page();
340 vm_info.vm_regs.rsp = (rsp +4092 );// - 0x2000;
344 //add_shared_mem_range(&(vm_info.mem_layout), 0x0, 0x1000, 0x100000);
345 // add_shared_mem_range(&(vm_info.mem_layout), 0x0, 0x100000, 0x0);
347 shadow_region_t *ent = Malloc(sizeof(shadow_region_t));;
348 init_shadow_region_physical(ent,0,0x100000,GUEST_REGION_PHYSICAL_MEMORY,
349 0x100000, HOST_REGION_PHYSICAL_MEMORY);
350 add_shadow_region(&(vm_info.mem_map),ent);
352 hook_io_port(&(vm_info.io_map), 0x61, &IO_Read, &IO_Write);
353 hook_io_port(&(vm_info.io_map), 0x05, &IO_Read, &IO_Write_to_Serial);
357 vm_info.cs.base=0xf000;
358 vm_info.cs.limit=0xffff;
360 //vm_info.rip = 0xfff0;
363 vm_info.vm_regs.rsp = 0x0;
366 PrintBoth("Initializing Guest (eip=0x%.8x) (esp=0x%.8x)\n", (uint_t)vm_info.rip,(uint_t)vm_info.vm_regs.rsp);
367 (vmm_ops).init_guest(&vm_info);
368 PrintBoth("Starting Guest\n");
369 (vmm_ops).start_guest(&vm_info);
376 TODO("Write a Virtual Machine Monitor");