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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
26:
27: void
28: __set_irq(int vector, void *loc)
29: {
30: SET_IVT(vector, SEGOFF(SEG_BIOS, (u32)loc - BUILD_BIOS_ADDR));
31: }
32:
33: #define set_irq(vector, func) do { \
34: extern void func (void); \
35: __set_irq(vector, func); \
36: } while (0)
37:
38: static void
39: init_ivt()
40: {
41: dprintf(3, "init ivt\n");
42:
43: // Initialize all vectors to the default handler.
44: int i;
45: for (i=0; i<256; i++)
46: set_irq(i, entry_iret_official);
47:
48: // Initialize all hw vectors to a default hw handler.
49: for (i=0x08; i<=0x0f; i++)
50: set_irq(i, entry_hwpic1);
51: for (i=0x70; i<=0x77; i++)
52: set_irq(i, entry_hwpic2);
53:
54: // Initialize software handlers.
55: set_irq(0x02, entry_02);
56: set_irq(0x10, entry_10);
57: set_irq(0x11, entry_11);
58: set_irq(0x12, entry_12);
59: set_irq(0x13, entry_13_official);
60: set_irq(0x14, entry_14);
61: set_irq(0x15, entry_15);
62: set_irq(0x16, entry_16);
63: set_irq(0x17, entry_17);
64: set_irq(0x18, entry_18);
65: set_irq(0x19, entry_19_official);
66: set_irq(0x1a, entry_1a);
67: set_irq(0x40, entry_40);
68:
69: // set vector 0x79 to zero
70: // this is used by 'gardian angel' protection system
71: SET_IVT(0x79, SEGOFF(0, 0));
72:
73: __set_irq(0x1E, &diskette_param_table2);
74: }
75:
76: static void
77: init_bda()
78: {
79: dprintf(3, "init bda\n");
80:
81: struct bios_data_area_s *bda = MAKE_FLATPTR(SEG_BDA, 0);
82: memset(bda, 0, sizeof(*bda));
83:
84: int esize = EBDA_SIZE_START;
85: SET_BDA(mem_size_kb, BUILD_LOWRAM_END/1024 - esize);
86: u16 eseg = EBDA_SEGMENT_START;
87: SET_BDA(ebda_seg, eseg);
88:
89: // Init ebda
90: struct extended_bios_data_area_s *ebda = get_ebda_ptr();
91: memset(ebda, 0, sizeof(*ebda));
92: ebda->size = esize;
93: }
94:
95: static void
96: ram_probe(void)
97: {
98: dprintf(3, "Find memory size\n");
99: if (CONFIG_COREBOOT) {
100: coreboot_setup();
101: } else {
102: // On emulators, get memory size from nvram.
103: u32 rs = ((inb_cmos(CMOS_MEM_EXTMEM2_LOW) << 16)
104: | (inb_cmos(CMOS_MEM_EXTMEM2_HIGH) << 24));
105: if (rs)
106: rs += 16 * 1024 * 1024;
107: else
108: rs = (((inb_cmos(CMOS_MEM_EXTMEM_LOW) << 10)
109: | (inb_cmos(CMOS_MEM_EXTMEM_HIGH) << 18))
110: + 1 * 1024 * 1024);
111: RamSize = rs;
112: add_e820(0, rs, E820_RAM);
113:
114: // Check for memory over 4Gig
115: u64 high = ((inb_cmos(CMOS_MEM_HIGHMEM_LOW) << 16)
116: | (inb_cmos(CMOS_MEM_HIGHMEM_MID) << 24)
117: | ((u64)inb_cmos(CMOS_MEM_HIGHMEM_HIGH) << 32));
118: RamSizeOver4G = high;
119: add_e820(0x100000000ull, high, E820_RAM);
120:
121: /* reserve 256KB BIOS area at the end of 4 GB */
122: add_e820(0xfffc0000, 256*1024, E820_RESERVED);
123: }
124:
125: // Don't declare any memory between 0xa0000 and 0x100000
126: add_e820(BUILD_LOWRAM_END, BUILD_BIOS_ADDR-BUILD_LOWRAM_END, E820_HOLE);
127:
128: // Mark known areas as reserved.
129: u16 ebda_seg = get_ebda_seg();
130: add_e820((u32)MAKE_FLATPTR(ebda_seg, 0), GET_EBDA2(ebda_seg, size) * 1024
131: , E820_RESERVED);
132: add_e820(BUILD_BIOS_ADDR, BUILD_BIOS_SIZE, E820_RESERVED);
133:
134: if (kvm_para_available())
135: // 4 pages before the bios, 3 pages for vmx tss pages, the
136: // other page for EPT real mode pagetable
137: add_e820(0xfffbc000, 4*4096, E820_RESERVED);
138:
139: dprintf(1, "Ram Size=0x%08x\n", RamSize);
140: }
141:
142: static void
143: init_bios_tables(void)
144: {
145: if (CONFIG_COREBOOT) {
146: coreboot_copy_biostable();
147: return;
148: }
149:
150: create_pirtable();
151:
152: mptable_init();
153:
154: smbios_init();
155:
156: acpi_bios_init();
157: }
158:
159: // Main setup code.
160: static void
161: post()
162: {
163: // Detect and init ram.
164: init_ivt();
165: init_bda();
166: memmap_setup();
167: ram_probe();
168: malloc_setup();
169: thread_setup();
170:
171: // Init base pc hardware.
172: pic_setup();
173: timer_setup();
174: mathcp_setup();
175:
176: // Initialize smp
177: qemu_cfg_port_probe();
178: smp_probe_setup();
179: mtrr_setup();
180: smp_probe();
181:
182: // Initialize pci
183: pci_setup();
184: smm_init();
185:
186: // Setup interfaces that option roms may need
187: pmm_setup();
188: pnp_setup();
189: kbd_setup();
190: mouse_setup();
191: init_bios_tables();
192:
193: // Run vga option rom (if running synchronously)
194: if (!CONFIG_THREADS || !CONFIG_THREAD_OPTIONROMS)
195: vga_setup();
196:
197: // Initialize hardware devices
198: usb_setup();
199: ps2port_setup();
200: lpt_setup();
201: serial_setup();
202:
203: boot_setup();
204: drive_setup();
205: cdemu_setup();
206: floppy_setup();
207: ata_setup();
208: ramdisk_setup();
209:
210: // Run option roms
211: if (CONFIG_THREADS && CONFIG_THREAD_OPTIONROMS) {
212: // Run option roms while hw init still in progress.
213: vga_setup();
214: optionrom_setup();
215: wait_threads();
216: } else {
217: // Wait for hw init to finish and run non-vga option roms.
218: wait_threads();
219: optionrom_setup();
220: }
221:
222: // Run BCVs and show optional boot menu
223: boot_prep();
224:
225: // Finalize data structures before boot
226: pmm_finalize();
227: malloc_finalize();
228: memmap_finalize();
229: }
230:
231: // 32-bit entry point.
232: void VISIBLE32
233: _start()
234: {
235: init_dma();
236:
237: debug_serial_setup();
238: dprintf(1, "Start bios (version %s)\n", VERSION);
239:
240: // Allow writes to modify bios area (0xf0000)
241: make_bios_writable();
242:
243: // Perform main setup code.
244: post();
245:
246: // Setup bios checksum.
247: BiosChecksum -= checksum((u8*)BUILD_BIOS_ADDR, BUILD_BIOS_SIZE);
248:
249: // Write protect bios memory.
250: make_bios_readonly();
251:
252: // Invoke int 19 to start boot process.
253: dprintf(3, "Jump to int19\n");
254: struct bregs br;
255: memset(&br, 0, sizeof(br));
256: br.flags = F_IF;
257: call16_int(0x19, &br);
258: }
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