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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
1.1.1.2 ! root 39: init_ivt(void)
1.1 root 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:
1.1.1.2 ! root 69: // INT 60h-66h reserved for user interrupt
! 70: for (i=0x60; i<=0x66; i++)
! 71: SET_IVT(i, SEGOFF(0, 0));
! 72:
1.1 root 73: // set vector 0x79 to zero
74: // this is used by 'gardian angel' protection system
75: SET_IVT(0x79, SEGOFF(0, 0));
76:
77: __set_irq(0x1E, &diskette_param_table2);
78: }
79:
80: static void
1.1.1.2 ! root 81: init_bda(void)
1.1 root 82: {
83: dprintf(3, "init bda\n");
84:
85: struct bios_data_area_s *bda = MAKE_FLATPTR(SEG_BDA, 0);
86: memset(bda, 0, sizeof(*bda));
87:
88: int esize = EBDA_SIZE_START;
89: SET_BDA(mem_size_kb, BUILD_LOWRAM_END/1024 - esize);
90: u16 eseg = EBDA_SEGMENT_START;
91: SET_BDA(ebda_seg, eseg);
92:
93: // Init ebda
94: struct extended_bios_data_area_s *ebda = get_ebda_ptr();
95: memset(ebda, 0, sizeof(*ebda));
96: ebda->size = esize;
97: }
98:
99: static void
100: ram_probe(void)
101: {
102: dprintf(3, "Find memory size\n");
103: if (CONFIG_COREBOOT) {
104: coreboot_setup();
105: } else {
106: // On emulators, get memory size from nvram.
107: u32 rs = ((inb_cmos(CMOS_MEM_EXTMEM2_LOW) << 16)
108: | (inb_cmos(CMOS_MEM_EXTMEM2_HIGH) << 24));
109: if (rs)
110: rs += 16 * 1024 * 1024;
111: else
112: rs = (((inb_cmos(CMOS_MEM_EXTMEM_LOW) << 10)
113: | (inb_cmos(CMOS_MEM_EXTMEM_HIGH) << 18))
114: + 1 * 1024 * 1024);
115: RamSize = rs;
116: add_e820(0, rs, E820_RAM);
117:
118: // Check for memory over 4Gig
119: u64 high = ((inb_cmos(CMOS_MEM_HIGHMEM_LOW) << 16)
1.1.1.2 ! root 120: | ((u32)inb_cmos(CMOS_MEM_HIGHMEM_MID) << 24)
1.1 root 121: | ((u64)inb_cmos(CMOS_MEM_HIGHMEM_HIGH) << 32));
122: RamSizeOver4G = high;
123: add_e820(0x100000000ull, high, E820_RAM);
124:
125: /* reserve 256KB BIOS area at the end of 4 GB */
126: add_e820(0xfffc0000, 256*1024, E820_RESERVED);
127: }
128:
129: // Don't declare any memory between 0xa0000 and 0x100000
130: add_e820(BUILD_LOWRAM_END, BUILD_BIOS_ADDR-BUILD_LOWRAM_END, E820_HOLE);
131:
132: // Mark known areas as reserved.
133: u16 ebda_seg = get_ebda_seg();
134: add_e820((u32)MAKE_FLATPTR(ebda_seg, 0), GET_EBDA2(ebda_seg, size) * 1024
135: , E820_RESERVED);
136: add_e820(BUILD_BIOS_ADDR, BUILD_BIOS_SIZE, E820_RESERVED);
137:
138: if (kvm_para_available())
139: // 4 pages before the bios, 3 pages for vmx tss pages, the
140: // other page for EPT real mode pagetable
141: add_e820(0xfffbc000, 4*4096, E820_RESERVED);
142:
1.1.1.2 ! root 143: dprintf(1, "Ram Size=0x%08x (0x%08x%08x high)\n"
! 144: , RamSize, (u32)(RamSizeOver4G >> 32), (u32)RamSizeOver4G);
1.1 root 145: }
146:
147: static void
148: init_bios_tables(void)
149: {
150: if (CONFIG_COREBOOT) {
151: coreboot_copy_biostable();
152: return;
153: }
154:
155: create_pirtable();
156:
157: mptable_init();
158:
159: smbios_init();
160:
161: acpi_bios_init();
162: }
163:
164: // Main setup code.
165: static void
1.1.1.2 ! root 166: post(void)
1.1 root 167: {
168: // Detect and init ram.
169: init_ivt();
170: init_bda();
171: memmap_setup();
172: ram_probe();
173: malloc_setup();
174: thread_setup();
175:
176: // Init base pc hardware.
177: pic_setup();
178: timer_setup();
179: mathcp_setup();
180:
181: // Initialize smp
182: qemu_cfg_port_probe();
183: smp_probe_setup();
184: mtrr_setup();
185: smp_probe();
186:
187: // Initialize pci
188: pci_setup();
189: smm_init();
190:
191: // Setup interfaces that option roms may need
1.1.1.2 ! root 192: bios32_setup();
1.1 root 193: pmm_setup();
194: pnp_setup();
195: kbd_setup();
196: mouse_setup();
197: init_bios_tables();
198:
199: // Run vga option rom (if running synchronously)
200: if (!CONFIG_THREADS || !CONFIG_THREAD_OPTIONROMS)
201: vga_setup();
202:
203: // Initialize hardware devices
204: usb_setup();
205: ps2port_setup();
206: lpt_setup();
207: serial_setup();
208:
209: boot_setup();
210: drive_setup();
211: cdemu_setup();
212: floppy_setup();
213: ata_setup();
214: ramdisk_setup();
215:
216: // Run option roms
217: if (CONFIG_THREADS && CONFIG_THREAD_OPTIONROMS) {
218: // Run option roms while hw init still in progress.
219: vga_setup();
220: optionrom_setup();
221: wait_threads();
222: } else {
223: // Wait for hw init to finish and run non-vga option roms.
224: wait_threads();
225: optionrom_setup();
226: }
227:
228: // Run BCVs and show optional boot menu
229: boot_prep();
230:
231: // Finalize data structures before boot
232: pmm_finalize();
233: malloc_finalize();
234: memmap_finalize();
235: }
236:
237: // 32-bit entry point.
1.1.1.2 ! root 238: void VISIBLE32FLAT
! 239: _start(void)
1.1 root 240: {
241: init_dma();
242:
243: debug_serial_setup();
244: dprintf(1, "Start bios (version %s)\n", VERSION);
245:
246: // Allow writes to modify bios area (0xf0000)
247: make_bios_writable();
248:
249: // Perform main setup code.
250: post();
251:
252: // Setup bios checksum.
253: BiosChecksum -= checksum((u8*)BUILD_BIOS_ADDR, BUILD_BIOS_SIZE);
254:
255: // Write protect bios memory.
256: make_bios_readonly();
257:
258: // Invoke int 19 to start boot process.
259: dprintf(3, "Jump to int19\n");
260: struct bregs br;
261: memset(&br, 0, sizeof(br));
262: br.flags = F_IF;
263: call16_int(0x19, &br);
264: }
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