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1.1 root 1: // 32bit code to Power On Self Test (POST) a machine.
2: //
3: // Copyright (C) 2008,2009 Kevin O'Connor <[email protected]>
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
15: #include "memmap.h" // add_e820
16: #include "pic.h" // pic_setup
17: #include "pci.h" // create_pirtable
18: #include "acpi.h" // acpi_bios_init
19: #include "bregs.h" // struct bregs
20: #include "mptable.h" // mptable_init
21: #include "boot.h" // IPL
22: #include "usb.h" // usb_setup
23: #include "smbios.h" // smbios_init
24: #include "paravirt.h" // qemu_cfg_port_probe
25: #include "ps2port.h" // ps2port_setup
1.1.1.3 ! root 26: #include "virtio-blk.h" // virtio_blk_setup
1.1 root 27:
28: void
29: __set_irq(int vector, void *loc)
30: {
31: SET_IVT(vector, SEGOFF(SEG_BIOS, (u32)loc - BUILD_BIOS_ADDR));
32: }
33:
34: #define set_irq(vector, func) do { \
35: extern void func (void); \
36: __set_irq(vector, func); \
37: } while (0)
38:
39: static void
1.1.1.2 root 40: init_ivt(void)
1.1 root 41: {
42: dprintf(3, "init ivt\n");
43:
44: // Initialize all vectors to the default handler.
45: int i;
46: for (i=0; i<256; i++)
47: set_irq(i, entry_iret_official);
48:
49: // Initialize all hw vectors to a default hw handler.
50: for (i=0x08; i<=0x0f; i++)
51: set_irq(i, entry_hwpic1);
52: for (i=0x70; i<=0x77; i++)
53: set_irq(i, entry_hwpic2);
54:
55: // Initialize software handlers.
56: set_irq(0x02, entry_02);
57: set_irq(0x10, entry_10);
58: set_irq(0x11, entry_11);
59: set_irq(0x12, entry_12);
60: set_irq(0x13, entry_13_official);
61: set_irq(0x14, entry_14);
62: set_irq(0x15, entry_15);
63: set_irq(0x16, entry_16);
64: set_irq(0x17, entry_17);
65: set_irq(0x18, entry_18);
66: set_irq(0x19, entry_19_official);
67: set_irq(0x1a, entry_1a);
68: set_irq(0x40, entry_40);
69:
1.1.1.2 root 70: // INT 60h-66h reserved for user interrupt
71: for (i=0x60; i<=0x66; i++)
72: SET_IVT(i, SEGOFF(0, 0));
73:
1.1 root 74: // set vector 0x79 to zero
75: // this is used by 'gardian angel' protection system
76: SET_IVT(0x79, SEGOFF(0, 0));
77:
78: __set_irq(0x1E, &diskette_param_table2);
79: }
80:
81: static void
1.1.1.2 root 82: init_bda(void)
1.1 root 83: {
84: dprintf(3, "init bda\n");
85:
86: struct bios_data_area_s *bda = MAKE_FLATPTR(SEG_BDA, 0);
87: memset(bda, 0, sizeof(*bda));
88:
89: int esize = EBDA_SIZE_START;
90: SET_BDA(mem_size_kb, BUILD_LOWRAM_END/1024 - esize);
91: u16 eseg = EBDA_SEGMENT_START;
92: SET_BDA(ebda_seg, eseg);
93:
94: // Init ebda
95: struct extended_bios_data_area_s *ebda = get_ebda_ptr();
96: memset(ebda, 0, sizeof(*ebda));
97: ebda->size = esize;
98: }
99:
100: static void
101: ram_probe(void)
102: {
103: dprintf(3, "Find memory size\n");
104: if (CONFIG_COREBOOT) {
105: coreboot_setup();
106: } else {
107: // On emulators, get memory size from nvram.
108: u32 rs = ((inb_cmos(CMOS_MEM_EXTMEM2_LOW) << 16)
109: | (inb_cmos(CMOS_MEM_EXTMEM2_HIGH) << 24));
110: if (rs)
111: rs += 16 * 1024 * 1024;
112: else
113: rs = (((inb_cmos(CMOS_MEM_EXTMEM_LOW) << 10)
114: | (inb_cmos(CMOS_MEM_EXTMEM_HIGH) << 18))
115: + 1 * 1024 * 1024);
116: RamSize = rs;
117: add_e820(0, rs, E820_RAM);
118:
119: // Check for memory over 4Gig
120: u64 high = ((inb_cmos(CMOS_MEM_HIGHMEM_LOW) << 16)
1.1.1.2 root 121: | ((u32)inb_cmos(CMOS_MEM_HIGHMEM_MID) << 24)
1.1 root 122: | ((u64)inb_cmos(CMOS_MEM_HIGHMEM_HIGH) << 32));
123: RamSizeOver4G = high;
124: add_e820(0x100000000ull, high, E820_RAM);
125:
126: /* reserve 256KB BIOS area at the end of 4 GB */
127: add_e820(0xfffc0000, 256*1024, E820_RESERVED);
128: }
129:
130: // Don't declare any memory between 0xa0000 and 0x100000
131: add_e820(BUILD_LOWRAM_END, BUILD_BIOS_ADDR-BUILD_LOWRAM_END, E820_HOLE);
132:
133: // Mark known areas as reserved.
134: u16 ebda_seg = get_ebda_seg();
135: add_e820((u32)MAKE_FLATPTR(ebda_seg, 0), GET_EBDA2(ebda_seg, size) * 1024
136: , E820_RESERVED);
137: add_e820(BUILD_BIOS_ADDR, BUILD_BIOS_SIZE, E820_RESERVED);
138:
1.1.1.3 ! root 139: u32 count = qemu_cfg_e820_entries();
! 140: if (count) {
! 141: struct e820_reservation entry;
! 142: int i;
! 143:
! 144: for (i = 0; i < count; i++) {
! 145: qemu_cfg_e820_load_next(&entry);
! 146: add_e820(entry.address, entry.length, entry.type);
! 147: }
! 148: } else if (kvm_para_available()) {
! 149: // Backwards compatibility - provide hard coded range.
1.1 root 150: // 4 pages before the bios, 3 pages for vmx tss pages, the
151: // other page for EPT real mode pagetable
152: add_e820(0xfffbc000, 4*4096, E820_RESERVED);
1.1.1.3 ! root 153: }
1.1 root 154:
1.1.1.2 root 155: dprintf(1, "Ram Size=0x%08x (0x%08x%08x high)\n"
156: , RamSize, (u32)(RamSizeOver4G >> 32), (u32)RamSizeOver4G);
1.1 root 157: }
158:
159: static void
160: init_bios_tables(void)
161: {
162: if (CONFIG_COREBOOT) {
163: coreboot_copy_biostable();
164: return;
165: }
166:
167: create_pirtable();
168:
169: mptable_init();
170:
171: smbios_init();
172:
173: acpi_bios_init();
174: }
175:
1.1.1.3 ! root 176: // Initialize hardware devices
! 177: static void
! 178: init_hw(void)
! 179: {
! 180: usb_setup();
! 181: ps2port_setup();
! 182: lpt_setup();
! 183: serial_setup();
! 184:
! 185: floppy_setup();
! 186: ata_setup();
! 187: ramdisk_setup();
! 188: virtio_blk_setup();
! 189: }
! 190:
1.1 root 191: // Main setup code.
192: static void
1.1.1.2 root 193: post(void)
1.1 root 194: {
195: // Detect and init ram.
196: init_ivt();
197: init_bda();
198: memmap_setup();
1.1.1.3 ! root 199: qemu_cfg_port_probe();
1.1 root 200: ram_probe();
201: malloc_setup();
202: thread_setup();
203:
204: // Init base pc hardware.
205: pic_setup();
206: timer_setup();
207: mathcp_setup();
208:
1.1.1.3 ! root 209: // Initialize mtrr
1.1 root 210: smp_probe_setup();
211: mtrr_setup();
212:
213: // Initialize pci
214: pci_setup();
215: smm_init();
216:
1.1.1.3 ! root 217: // Initialize internal tables
! 218: boot_setup();
! 219: drive_setup();
! 220:
! 221: // Start hardware initialization (if optionrom threading)
! 222: if (CONFIG_THREADS && CONFIG_THREAD_OPTIONROMS)
! 223: init_hw();
! 224:
! 225: // Find and initialize other cpus
! 226: smp_probe();
! 227:
1.1 root 228: // Setup interfaces that option roms may need
1.1.1.2 root 229: bios32_setup();
1.1 root 230: pmm_setup();
231: pnp_setup();
232: kbd_setup();
233: mouse_setup();
234: init_bios_tables();
235:
1.1.1.3 ! root 236: // Run vga option rom
! 237: vga_setup();
1.1 root 238:
1.1.1.3 ! root 239: // Do hardware initialization (if running synchronously)
! 240: if (!CONFIG_THREADS || !CONFIG_THREAD_OPTIONROMS) {
! 241: init_hw();
1.1 root 242: wait_threads();
243: }
244:
1.1.1.3 ! root 245: // Run option roms
! 246: optionrom_setup();
! 247:
1.1 root 248: // Run BCVs and show optional boot menu
249: boot_prep();
250:
251: // Finalize data structures before boot
1.1.1.3 ! root 252: cdemu_setup();
1.1 root 253: pmm_finalize();
254: malloc_finalize();
255: memmap_finalize();
256: }
257:
258: // 32-bit entry point.
1.1.1.2 root 259: void VISIBLE32FLAT
260: _start(void)
1.1 root 261: {
262: init_dma();
263:
264: debug_serial_setup();
265: dprintf(1, "Start bios (version %s)\n", VERSION);
266:
267: // Allow writes to modify bios area (0xf0000)
268: make_bios_writable();
269:
270: // Perform main setup code.
271: post();
272:
273: // Setup bios checksum.
274: BiosChecksum -= checksum((u8*)BUILD_BIOS_ADDR, BUILD_BIOS_SIZE);
275:
276: // Write protect bios memory.
277: make_bios_readonly();
278:
279: // Invoke int 19 to start boot process.
280: dprintf(3, "Jump to int19\n");
281: struct bregs br;
282: memset(&br, 0, sizeof(br));
283: br.flags = F_IF;
284: call16_int(0x19, &br);
285: }
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