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1.1 root 1: // 32bit code to Power On Self Test (POST) a machine.
2: //
1.1.1.4 root 3: // Copyright (C) 2008-2010 Kevin O'Connor <[email protected]>
1.1 root 4: // Copyright (C) 2002 MandrakeSoft S.A.
5: //
6: // This file may be distributed under the terms of the GNU LGPLv3 license.
7:
8: #include "ioport.h" // PORT_*
9: #include "config.h" // CONFIG_*
10: #include "cmos.h" // CMOS_*
11: #include "util.h" // memset
12: #include "biosvar.h" // struct bios_data_area_s
13: #include "disk.h" // floppy_drive_setup
14: #include "ata.h" // ata_setup
1.1.1.5 root 15: #include "ahci.h" // ahci_setup
1.1 root 16: #include "memmap.h" // add_e820
17: #include "pic.h" // pic_setup
18: #include "pci.h" // create_pirtable
19: #include "acpi.h" // acpi_bios_init
20: #include "bregs.h" // struct bregs
21: #include "mptable.h" // mptable_init
22: #include "boot.h" // IPL
23: #include "usb.h" // usb_setup
24: #include "smbios.h" // smbios_init
25: #include "paravirt.h" // qemu_cfg_port_probe
1.1.1.6 root 26: #include "xen.h" // xen_probe_hvm_info
1.1 root 27: #include "ps2port.h" // ps2port_setup
1.1.1.3 root 28: #include "virtio-blk.h" // virtio_blk_setup
1.1.1.7 ! root 29: #include "virtio-scsi.h" // virtio_scsi_setup
1.1 root 30:
1.1.1.5 root 31:
32: /****************************************************************
33: * BIOS init
34: ****************************************************************/
35:
1.1 root 36: static void
1.1.1.2 root 37: init_ivt(void)
1.1 root 38: {
39: dprintf(3, "init ivt\n");
40:
41: // Initialize all vectors to the default handler.
42: int i;
43: for (i=0; i<256; i++)
1.1.1.4 root 44: SET_IVT(i, FUNC16(entry_iret_official));
1.1 root 45:
46: // Initialize all hw vectors to a default hw handler.
47: for (i=0x08; i<=0x0f; i++)
1.1.1.4 root 48: SET_IVT(i, FUNC16(entry_hwpic1));
1.1 root 49: for (i=0x70; i<=0x77; i++)
1.1.1.4 root 50: SET_IVT(i, FUNC16(entry_hwpic2));
1.1 root 51:
52: // Initialize software handlers.
1.1.1.4 root 53: SET_IVT(0x02, FUNC16(entry_02));
54: SET_IVT(0x10, FUNC16(entry_10));
55: SET_IVT(0x11, FUNC16(entry_11));
56: SET_IVT(0x12, FUNC16(entry_12));
57: SET_IVT(0x13, FUNC16(entry_13_official));
58: SET_IVT(0x14, FUNC16(entry_14));
59: SET_IVT(0x15, FUNC16(entry_15));
60: SET_IVT(0x16, FUNC16(entry_16));
61: SET_IVT(0x17, FUNC16(entry_17));
62: SET_IVT(0x18, FUNC16(entry_18));
63: SET_IVT(0x19, FUNC16(entry_19_official));
64: SET_IVT(0x1a, FUNC16(entry_1a));
65: SET_IVT(0x40, FUNC16(entry_40));
1.1 root 66:
1.1.1.2 root 67: // INT 60h-66h reserved for user interrupt
68: for (i=0x60; i<=0x66; i++)
69: SET_IVT(i, SEGOFF(0, 0));
70:
1.1 root 71: // set vector 0x79 to zero
72: // this is used by 'gardian angel' protection system
73: SET_IVT(0x79, SEGOFF(0, 0));
74:
1.1.1.4 root 75: SET_IVT(0x1E, SEGOFF(SEG_BIOS, (u32)&diskette_param_table2 - BUILD_BIOS_ADDR));
1.1 root 76: }
77:
78: static void
1.1.1.2 root 79: init_bda(void)
1.1 root 80: {
81: dprintf(3, "init bda\n");
82:
83: struct bios_data_area_s *bda = MAKE_FLATPTR(SEG_BDA, 0);
84: memset(bda, 0, sizeof(*bda));
85:
86: int esize = EBDA_SIZE_START;
87: SET_BDA(mem_size_kb, BUILD_LOWRAM_END/1024 - esize);
1.1.1.5 root 88: u16 ebda_seg = EBDA_SEGMENT_START;
89: SET_BDA(ebda_seg, ebda_seg);
1.1 root 90:
91: // Init ebda
92: struct extended_bios_data_area_s *ebda = get_ebda_ptr();
93: memset(ebda, 0, sizeof(*ebda));
94: ebda->size = esize;
1.1.1.5 root 95:
96: add_e820((u32)MAKE_FLATPTR(ebda_seg, 0), GET_EBDA2(ebda_seg, size) * 1024
97: , E820_RESERVED);
1.1 root 98: }
99:
100: static void
101: ram_probe(void)
102: {
103: dprintf(3, "Find memory size\n");
104: if (CONFIG_COREBOOT) {
105: coreboot_setup();
1.1.1.6 root 106: } else if (usingXen()) {
1.1.1.7 ! root 107: xen_setup();
1.1 root 108: } else {
109: // On emulators, get memory size from nvram.
110: u32 rs = ((inb_cmos(CMOS_MEM_EXTMEM2_LOW) << 16)
111: | (inb_cmos(CMOS_MEM_EXTMEM2_HIGH) << 24));
112: if (rs)
113: rs += 16 * 1024 * 1024;
114: else
115: rs = (((inb_cmos(CMOS_MEM_EXTMEM_LOW) << 10)
116: | (inb_cmos(CMOS_MEM_EXTMEM_HIGH) << 18))
117: + 1 * 1024 * 1024);
118: RamSize = rs;
119: add_e820(0, rs, E820_RAM);
120:
121: // Check for memory over 4Gig
122: u64 high = ((inb_cmos(CMOS_MEM_HIGHMEM_LOW) << 16)
1.1.1.2 root 123: | ((u32)inb_cmos(CMOS_MEM_HIGHMEM_MID) << 24)
1.1 root 124: | ((u64)inb_cmos(CMOS_MEM_HIGHMEM_HIGH) << 32));
125: RamSizeOver4G = high;
126: add_e820(0x100000000ull, high, E820_RAM);
127:
128: /* reserve 256KB BIOS area at the end of 4 GB */
129: add_e820(0xfffc0000, 256*1024, E820_RESERVED);
130: }
131:
132: // Don't declare any memory between 0xa0000 and 0x100000
133: add_e820(BUILD_LOWRAM_END, BUILD_BIOS_ADDR-BUILD_LOWRAM_END, E820_HOLE);
134:
135: // Mark known areas as reserved.
136: add_e820(BUILD_BIOS_ADDR, BUILD_BIOS_SIZE, E820_RESERVED);
137:
1.1.1.3 root 138: u32 count = qemu_cfg_e820_entries();
139: if (count) {
140: struct e820_reservation entry;
141: int i;
142:
143: for (i = 0; i < count; i++) {
144: qemu_cfg_e820_load_next(&entry);
145: add_e820(entry.address, entry.length, entry.type);
146: }
147: } else if (kvm_para_available()) {
148: // Backwards compatibility - provide hard coded range.
1.1 root 149: // 4 pages before the bios, 3 pages for vmx tss pages, the
150: // other page for EPT real mode pagetable
151: add_e820(0xfffbc000, 4*4096, E820_RESERVED);
1.1.1.3 root 152: }
1.1 root 153:
1.1.1.7 ! root 154: dprintf(1, "Ram Size=0x%08x (0x%016llx high)\n", RamSize, RamSizeOver4G);
1.1 root 155: }
156:
157: static void
158: init_bios_tables(void)
159: {
160: if (CONFIG_COREBOOT) {
161: coreboot_copy_biostable();
162: return;
163: }
1.1.1.6 root 164: if (usingXen()) {
1.1.1.7 ! root 165: xen_copy_biostables();
! 166: return;
1.1.1.6 root 167: }
1.1 root 168:
169: create_pirtable();
170:
171: mptable_init();
172:
173: smbios_init();
174:
175: acpi_bios_init();
176: }
177:
1.1.1.3 root 178: // Initialize hardware devices
179: static void
180: init_hw(void)
181: {
182: usb_setup();
183: ps2port_setup();
184: lpt_setup();
185: serial_setup();
186:
187: floppy_setup();
188: ata_setup();
1.1.1.5 root 189: ahci_setup();
190: cbfs_payload_setup();
1.1.1.3 root 191: ramdisk_setup();
192: virtio_blk_setup();
1.1.1.7 ! root 193: virtio_scsi_setup();
1.1.1.3 root 194: }
195:
1.1.1.5 root 196: // Begin the boot process by invoking an int0x19 in 16bit mode.
197: void VISIBLE32FLAT
198: startBoot(void)
199: {
200: // Clear low-memory allocations (required by PMM spec).
201: memset((void*)BUILD_STACK_ADDR, 0, BUILD_EBDA_MINIMUM - BUILD_STACK_ADDR);
202:
203: dprintf(3, "Jump to int19\n");
204: struct bregs br;
205: memset(&br, 0, sizeof(br));
206: br.flags = F_IF;
207: call16_int(0x19, &br);
208: }
209:
1.1 root 210: // Main setup code.
211: static void
1.1.1.5 root 212: maininit(void)
1.1 root 213: {
1.1.1.6 root 214: // Running at new code address - do code relocation fixups
215: malloc_fixupreloc();
216:
1.1.1.5 root 217: // Setup ivt/bda/ebda
1.1 root 218: init_ivt();
219: init_bda();
220:
221: // Init base pc hardware.
222: pic_setup();
223: timer_setup();
224: mathcp_setup();
225:
1.1.1.3 root 226: // Initialize mtrr
1.1 root 227: mtrr_setup();
228:
229: // Initialize pci
230: pci_setup();
231: smm_init();
232:
1.1.1.6 root 233: // Setup Xen hypercalls
234: xen_init_hypercalls();
235:
1.1.1.3 root 236: // Initialize internal tables
237: boot_setup();
238:
239: // Start hardware initialization (if optionrom threading)
240: if (CONFIG_THREADS && CONFIG_THREAD_OPTIONROMS)
241: init_hw();
242:
243: // Find and initialize other cpus
244: smp_probe();
245:
1.1 root 246: // Setup interfaces that option roms may need
1.1.1.2 root 247: bios32_setup();
1.1 root 248: pmm_setup();
249: pnp_setup();
250: kbd_setup();
251: mouse_setup();
252: init_bios_tables();
253:
1.1.1.3 root 254: // Run vga option rom
255: vga_setup();
1.1 root 256:
1.1.1.3 root 257: // Do hardware initialization (if running synchronously)
258: if (!CONFIG_THREADS || !CONFIG_THREAD_OPTIONROMS) {
259: init_hw();
1.1 root 260: wait_threads();
261: }
262:
1.1.1.3 root 263: // Run option roms
264: optionrom_setup();
265:
1.1 root 266: // Run BCVs and show optional boot menu
267: boot_prep();
268:
269: // Finalize data structures before boot
1.1.1.3 root 270: cdemu_setup();
1.1 root 271: pmm_finalize();
272: malloc_finalize();
273: memmap_finalize();
1.1.1.5 root 274:
275: // Setup bios checksum.
276: BiosChecksum -= checksum((u8*)BUILD_BIOS_ADDR, BUILD_BIOS_SIZE);
277:
278: // Write protect bios memory.
279: make_bios_readonly();
280:
281: // Invoke int 19 to start boot process.
282: startBoot();
283: }
284:
285:
286: /****************************************************************
1.1.1.6 root 287: * POST entry and code relocation
1.1.1.5 root 288: ****************************************************************/
289:
290: // Update given relocs for the code at 'dest' with a given 'delta'
291: static void
292: updateRelocs(void *dest, u32 *rstart, u32 *rend, u32 delta)
293: {
294: u32 *reloc;
295: for (reloc = rstart; reloc < rend; reloc++)
296: *((u32*)(dest + *reloc)) += delta;
297: }
298:
1.1.1.6 root 299: // Relocate init code and then call maininit() at new address.
1.1.1.5 root 300: static void
301: reloc_init(void)
302: {
303: if (!CONFIG_RELOCATE_INIT) {
304: maininit();
305: return;
306: }
307: // Symbols populated by the build.
308: extern u8 code32flat_start[];
309: extern u8 _reloc_min_align[];
310: extern u32 _reloc_abs_start[], _reloc_abs_end[];
311: extern u32 _reloc_rel_start[], _reloc_rel_end[];
312: extern u32 _reloc_init_start[], _reloc_init_end[];
313: extern u8 code32init_start[], code32init_end[];
314:
315: // Allocate space for init code.
316: u32 initsize = code32init_end - code32init_start;
317: u32 align = (u32)&_reloc_min_align;
318: void *dest = memalign_tmp(align, initsize);
319: if (!dest)
320: panic("No space for init relocation.\n");
321:
322: // Copy code and update relocs (init absolute, init relative, and runtime)
323: dprintf(1, "Relocating init from %p to %p (size %d)\n"
324: , code32init_start, dest, initsize);
325: s32 delta = dest - (void*)code32init_start;
326: memcpy(dest, code32init_start, initsize);
327: updateRelocs(dest, _reloc_abs_start, _reloc_abs_end, delta);
328: updateRelocs(dest, _reloc_rel_start, _reloc_rel_end, -delta);
329: updateRelocs(code32flat_start, _reloc_init_start, _reloc_init_end, delta);
330:
331: // Call maininit() in relocated code.
332: void (*func)(void) = (void*)maininit + delta;
333: barrier();
334: func();
335: }
336:
1.1.1.7 ! root 337: // Setup for code relocation and then call reloc_init
1.1.1.5 root 338: void VISIBLE32INIT
1.1.1.7 ! root 339: dopost(void)
! 340: {
! 341: HaveRunPost = 1;
! 342:
! 343: // Detect ram and setup internal malloc.
! 344: qemu_cfg_port_probe();
! 345: ram_probe();
! 346: malloc_setup();
! 347:
! 348: // Relocate initialization code and call maininit().
! 349: reloc_init();
! 350: }
! 351:
! 352: // Entry point for Power On Self Test (POST) - the BIOS initilization
! 353: // phase. This function makes the memory at 0xc0000-0xfffff
! 354: // read/writable and then calls dopost().
! 355: void VISIBLE32FLAT
1.1.1.6 root 356: handle_post(void)
1.1.1.5 root 357: {
1.1.1.6 root 358: debug_serial_setup();
359: dprintf(1, "Start bios (version %s)\n", VERSION);
1.1.1.5 root 360:
1.1.1.6 root 361: // Enable CPU caching
362: setcr0(getcr0() & ~(CR0_CD|CR0_NW));
1.1.1.5 root 363:
1.1.1.6 root 364: // Clear CMOS reboot flag.
365: outb_cmos(0, CMOS_RESET_CODE);
1.1 root 366:
1.1.1.6 root 367: // Make sure legacy DMA isn't running.
1.1 root 368: init_dma();
369:
1.1.1.6 root 370: // Check if we are running under Xen.
371: xen_probe();
1.1.1.5 root 372:
1.1 root 373: // Allow writes to modify bios area (0xf0000)
374: make_bios_writable();
375:
1.1.1.7 ! root 376: // Now that memory is read/writable - start post process.
! 377: dopost();
1.1 root 378: }
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