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Kevin O'Connorf076a3e2008-02-25 22:25:15 -05001// 32bit code to Power On Self Test (POST) a machine.
2//
Kevin O'Connorcadaf0e2010-07-26 23:47:26 -04003// Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net>
Kevin O'Connorf076a3e2008-02-25 22:25:15 -05004// Copyright (C) 2002 MandrakeSoft S.A.
5//
Kevin O'Connorb1b7c2a2009-01-15 20:52:58 -05006// This file may be distributed under the terms of the GNU LGPLv3 license.
Kevin O'Connorf076a3e2008-02-25 22:25:15 -05007
8#include "ioport.h" // PORT_*
Kevin O'Connorf076a3e2008-02-25 22:25:15 -05009#include "config.h" // CONFIG_*
10#include "cmos.h" // CMOS_*
11#include "util.h" // memset
12#include "biosvar.h" // struct bios_data_area_s
Kevin O'Connor3bbcc142008-04-13 17:07:33 -040013#include "disk.h" // floppy_drive_setup
Kevin O'Connorc892b132009-08-11 21:59:37 -040014#include "ata.h" // ata_setup
Gerd Hoffmannd52fdf62010-11-29 09:42:13 +010015#include "ahci.h" // ahci_setup
Kevin O'Connorc7812932008-06-08 23:08:12 -040016#include "memmap.h" // add_e820
Kevin O'Connorf54c1502008-06-14 15:56:16 -040017#include "pic.h" // pic_setup
Kevin O'Connor0525d292008-07-04 06:18:30 -040018#include "pci.h" // create_pirtable
19#include "acpi.h" // acpi_bios_init
Kevin O'Connor9521e262008-07-04 13:04:29 -040020#include "bregs.h" // struct bregs
Kevin O'Connor35746442009-02-27 20:54:51 -050021#include "mptable.h" // mptable_init
Kevin O'Connorc659fde2008-12-28 23:43:20 -050022#include "boot.h" // IPL
Kevin O'Connor114592f2009-09-28 21:32:08 -040023#include "usb.h" // usb_setup
Kevin O'Connor01a85202009-10-18 09:49:59 -040024#include "smbios.h" // smbios_init
25#include "paravirt.h" // qemu_cfg_port_probe
Ian Campbell74c78782011-06-01 11:00:29 +010026#include "xen.h" // xen_probe_hvm_info
Kevin O'Connor57877482009-12-09 21:00:41 -050027#include "ps2port.h" // ps2port_setup
Gleb Natapov89acfa32010-05-10 11:36:37 +030028#include "virtio-blk.h" // virtio_blk_setup
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050029
Kevin O'Connor025cabd2010-09-15 21:59:11 -040030
31/****************************************************************
32 * BIOS init
33 ****************************************************************/
34
Kevin O'Connore3677b12008-07-04 15:29:23 -040035static void
Kevin O'Connor1ca05b02010-01-03 17:43:37 -050036init_ivt(void)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050037{
Kevin O'Connor8c0e3722009-01-02 14:19:43 -050038 dprintf(3, "init ivt\n");
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050039
Kevin O'Connord67a7032009-01-17 19:37:26 -050040 // Initialize all vectors to the default handler.
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050041 int i;
Kevin O'Connore3677b12008-07-04 15:29:23 -040042 for (i=0; i<256; i++)
Kevin O'Connorcc9e1bf2010-07-28 21:31:38 -040043 SET_IVT(i, FUNC16(entry_iret_official));
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050044
Kevin O'Connord21c0892008-11-26 17:02:43 -050045 // Initialize all hw vectors to a default hw handler.
46 for (i=0x08; i<=0x0f; i++)
Kevin O'Connorcc9e1bf2010-07-28 21:31:38 -040047 SET_IVT(i, FUNC16(entry_hwpic1));
Kevin O'Connord21c0892008-11-26 17:02:43 -050048 for (i=0x70; i<=0x77; i++)
Kevin O'Connorcc9e1bf2010-07-28 21:31:38 -040049 SET_IVT(i, FUNC16(entry_hwpic2));
Kevin O'Connord21c0892008-11-26 17:02:43 -050050
51 // Initialize software handlers.
Kevin O'Connorcc9e1bf2010-07-28 21:31:38 -040052 SET_IVT(0x02, FUNC16(entry_02));
53 SET_IVT(0x10, FUNC16(entry_10));
54 SET_IVT(0x11, FUNC16(entry_11));
55 SET_IVT(0x12, FUNC16(entry_12));
56 SET_IVT(0x13, FUNC16(entry_13_official));
57 SET_IVT(0x14, FUNC16(entry_14));
58 SET_IVT(0x15, FUNC16(entry_15));
59 SET_IVT(0x16, FUNC16(entry_16));
60 SET_IVT(0x17, FUNC16(entry_17));
61 SET_IVT(0x18, FUNC16(entry_18));
62 SET_IVT(0x19, FUNC16(entry_19_official));
63 SET_IVT(0x1a, FUNC16(entry_1a));
64 SET_IVT(0x40, FUNC16(entry_40));
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050065
Kevin O'Connorb164d2c2009-12-26 23:24:52 -050066 // INT 60h-66h reserved for user interrupt
67 for (i=0x60; i<=0x66; i++)
68 SET_IVT(i, SEGOFF(0, 0));
69
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050070 // set vector 0x79 to zero
71 // this is used by 'gardian angel' protection system
Kevin O'Connor9f985422009-09-09 11:34:39 -040072 SET_IVT(0x79, SEGOFF(0, 0));
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050073
Kevin O'Connorcc9e1bf2010-07-28 21:31:38 -040074 SET_IVT(0x1E, SEGOFF(SEG_BIOS, (u32)&diskette_param_table2 - BUILD_BIOS_ADDR));
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050075}
76
77static void
Kevin O'Connor1ca05b02010-01-03 17:43:37 -050078init_bda(void)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050079{
Kevin O'Connor8c0e3722009-01-02 14:19:43 -050080 dprintf(3, "init bda\n");
81
Kevin O'Connor35ae7262009-01-19 15:44:44 -050082 struct bios_data_area_s *bda = MAKE_FLATPTR(SEG_BDA, 0);
Kevin O'Connor8c0e3722009-01-02 14:19:43 -050083 memset(bda, 0, sizeof(*bda));
84
Kevin O'Connor49553a42009-05-17 10:31:34 -040085 int esize = EBDA_SIZE_START;
Kevin O'Connorf416fe92009-09-24 20:51:55 -040086 SET_BDA(mem_size_kb, BUILD_LOWRAM_END/1024 - esize);
Kevin O'Connor025cabd2010-09-15 21:59:11 -040087 u16 ebda_seg = EBDA_SEGMENT_START;
88 SET_BDA(ebda_seg, ebda_seg);
Kevin O'Connor4d7c37e2008-12-26 23:50:17 -050089
Kevin O'Connor9becbf12009-07-12 09:29:46 -040090 // Init ebda
Kevin O'Connor4d7c37e2008-12-26 23:50:17 -050091 struct extended_bios_data_area_s *ebda = get_ebda_ptr();
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -050092 memset(ebda, 0, sizeof(*ebda));
Kevin O'Connor4d7c37e2008-12-26 23:50:17 -050093 ebda->size = esize;
Kevin O'Connor025cabd2010-09-15 21:59:11 -040094
95 add_e820((u32)MAKE_FLATPTR(ebda_seg, 0), GET_EBDA2(ebda_seg, size) * 1024
96 , E820_RESERVED);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050097}
98
99static void
Kevin O'Connor9571ac22008-05-17 22:20:27 -0400100ram_probe(void)
101{
Kevin O'Connor35192dd2008-06-08 19:18:33 -0400102 dprintf(3, "Find memory size\n");
Kevin O'Connorf64f0db2008-05-18 02:42:58 -0400103 if (CONFIG_COREBOOT) {
Kevin O'Connor4c0c85a2009-04-11 23:31:29 -0400104 coreboot_setup();
Ian Campbell74c78782011-06-01 11:00:29 +0100105 } else if (usingXen()) {
106 xen_setup();
Kevin O'Connorf64f0db2008-05-18 02:42:58 -0400107 } else {
108 // On emulators, get memory size from nvram.
Kevin O'Connor59c35f22008-10-25 23:05:42 -0400109 u32 rs = ((inb_cmos(CMOS_MEM_EXTMEM2_LOW) << 16)
110 | (inb_cmos(CMOS_MEM_EXTMEM2_HIGH) << 24));
Kevin O'Connorf64f0db2008-05-18 02:42:58 -0400111 if (rs)
112 rs += 16 * 1024 * 1024;
113 else
Kevin O'Connor59c35f22008-10-25 23:05:42 -0400114 rs = (((inb_cmos(CMOS_MEM_EXTMEM_LOW) << 10)
115 | (inb_cmos(CMOS_MEM_EXTMEM_HIGH) << 18))
Kevin O'Connorf64f0db2008-05-18 02:42:58 -0400116 + 1 * 1024 * 1024);
Kevin O'Connore7916362008-12-28 22:03:17 -0500117 RamSize = rs;
Kevin O'Connorc7812932008-06-08 23:08:12 -0400118 add_e820(0, rs, E820_RAM);
119
Kevin O'Connor59c35f22008-10-25 23:05:42 -0400120 // Check for memory over 4Gig
121 u64 high = ((inb_cmos(CMOS_MEM_HIGHMEM_LOW) << 16)
Kevin O'Connor669c9912010-01-05 19:50:04 -0500122 | ((u32)inb_cmos(CMOS_MEM_HIGHMEM_MID) << 24)
Kevin O'Connor59c35f22008-10-25 23:05:42 -0400123 | ((u64)inb_cmos(CMOS_MEM_HIGHMEM_HIGH) << 32));
Kevin O'Connore7916362008-12-28 22:03:17 -0500124 RamSizeOver4G = high;
Kevin O'Connor59c35f22008-10-25 23:05:42 -0400125 add_e820(0x100000000ull, high, E820_RAM);
126
Kevin O'Connorc7812932008-06-08 23:08:12 -0400127 /* reserve 256KB BIOS area at the end of 4 GB */
128 add_e820(0xfffc0000, 256*1024, E820_RESERVED);
Kevin O'Connorf64f0db2008-05-18 02:42:58 -0400129 }
Kevin O'Connor9571ac22008-05-17 22:20:27 -0400130
Kevin O'Connorb8d7a472008-06-21 11:43:32 -0400131 // Don't declare any memory between 0xa0000 and 0x100000
Kevin O'Connorf416fe92009-09-24 20:51:55 -0400132 add_e820(BUILD_LOWRAM_END, BUILD_BIOS_ADDR-BUILD_LOWRAM_END, E820_HOLE);
Kevin O'Connorb8d7a472008-06-21 11:43:32 -0400133
Kevin O'Connorc7812932008-06-08 23:08:12 -0400134 // Mark known areas as reserved.
Kevin O'Connore3677b12008-07-04 15:29:23 -0400135 add_e820(BUILD_BIOS_ADDR, BUILD_BIOS_SIZE, E820_RESERVED);
Kevin O'Connorc7812932008-06-08 23:08:12 -0400136
Jes Sorensen0360e8e2010-02-16 09:46:08 +0100137 u32 count = qemu_cfg_e820_entries();
138 if (count) {
139 struct e820_reservation entry;
140 int i;
141
142 for (i = 0; i < count; i++) {
143 qemu_cfg_e820_load_next(&entry);
144 add_e820(entry.address, entry.length, entry.type);
145 }
146 } else if (kvm_para_available()) {
147 // Backwards compatibility - provide hard coded range.
Kevin O'Connor7061eb62009-01-04 21:48:22 -0500148 // 4 pages before the bios, 3 pages for vmx tss pages, the
149 // other page for EPT real mode pagetable
150 add_e820(0xfffbc000, 4*4096, E820_RESERVED);
Jes Sorensen0360e8e2010-02-16 09:46:08 +0100151 }
Kevin O'Connor7061eb62009-01-04 21:48:22 -0500152
Kevin O'Connorc04090d2012-03-05 10:14:07 -0500153 dprintf(1, "Ram Size=0x%08x (0x%016llx high)\n", RamSize, RamSizeOver4G);
Kevin O'Connor9571ac22008-05-17 22:20:27 -0400154}
155
156static void
Kevin O'Connor0525d292008-07-04 06:18:30 -0400157init_bios_tables(void)
158{
Kevin O'Connordf5a5fd2009-07-28 20:46:03 -0400159 if (CONFIG_COREBOOT) {
160 coreboot_copy_biostable();
Kevin O'Connor0525d292008-07-04 06:18:30 -0400161 return;
Kevin O'Connordf5a5fd2009-07-28 20:46:03 -0400162 }
Ian Campbell74c78782011-06-01 11:00:29 +0100163 if (usingXen()) {
164 xen_copy_biostables();
165 return;
166 }
Kevin O'Connor0525d292008-07-04 06:18:30 -0400167
Kevin O'Connor0525d292008-07-04 06:18:30 -0400168 create_pirtable();
169
170 mptable_init();
171
172 smbios_init();
173
174 acpi_bios_init();
175}
176
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400177// Initialize hardware devices
178static void
179init_hw(void)
180{
181 usb_setup();
182 ps2port_setup();
183 lpt_setup();
184 serial_setup();
185
186 floppy_setup();
187 ata_setup();
Gerd Hoffmannd52fdf62010-11-29 09:42:13 +0100188 ahci_setup();
Kevin O'Connor89a1efd2011-01-08 12:24:39 -0500189 cbfs_payload_setup();
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400190 ramdisk_setup();
Gleb Natapov89acfa32010-05-10 11:36:37 +0300191 virtio_blk_setup();
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400192}
193
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400194// Begin the boot process by invoking an int0x19 in 16bit mode.
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400195void VISIBLE32FLAT
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400196startBoot(void)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500197{
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400198 // Clear low-memory allocations (required by PMM spec).
199 memset((void*)BUILD_STACK_ADDR, 0, BUILD_EBDA_MINIMUM - BUILD_STACK_ADDR);
200
201 dprintf(3, "Jump to int19\n");
202 struct bregs br;
203 memset(&br, 0, sizeof(br));
204 br.flags = F_IF;
205 call16_int(0x19, &br);
206}
207
208// Main setup code.
209static void
210maininit(void)
211{
Kevin O'Connor533b6282011-07-16 13:13:12 -0400212 // Running at new code address - do code relocation fixups
213 malloc_fixupreloc();
214
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400215 // Setup ivt/bda/ebda
Kevin O'Connor8c0e3722009-01-02 14:19:43 -0500216 init_ivt();
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500217 init_bda();
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500218
Kevin O'Connor969df602009-11-25 19:05:04 -0500219 // Init base pc hardware.
Kevin O'Connorf54c1502008-06-14 15:56:16 -0400220 pic_setup();
Kevin O'Connore6eb3f52008-04-13 17:37:41 -0400221 timer_setup();
Kevin O'Connor714325c2008-11-01 20:32:27 -0400222 mathcp_setup();
223
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400224 // Initialize mtrr
Kevin O'Connor7061eb62009-01-04 21:48:22 -0500225 mtrr_setup();
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500226
Kevin O'Connor969df602009-11-25 19:05:04 -0500227 // Initialize pci
Kevin O'Connor40f5b5a2009-09-13 10:46:57 -0400228 pci_setup();
229 smm_init();
230
Ian Campbell7fc039e2011-07-13 11:46:40 +0100231 // Setup Xen hypercalls
232 xen_init_hypercalls();
233
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400234 // Initialize internal tables
235 boot_setup();
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400236
237 // Start hardware initialization (if optionrom threading)
238 if (CONFIG_THREADS && CONFIG_THREAD_OPTIONROMS)
239 init_hw();
240
241 // Find and initialize other cpus
242 smp_probe();
243
Kevin O'Connor98032802009-12-09 20:18:31 -0500244 // Setup interfaces that option roms may need
Kevin O'Connor871e0a02009-12-30 12:14:53 -0500245 bios32_setup();
Kevin O'Connor969df602009-11-25 19:05:04 -0500246 pmm_setup();
Kevin O'Connor0c3068d2008-12-21 17:51:36 -0500247 pnp_setup();
Kevin O'Connor57877482009-12-09 21:00:41 -0500248 kbd_setup();
249 mouse_setup();
Kevin O'Connor98032802009-12-09 20:18:31 -0500250 init_bios_tables();
251
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400252 // Run vga option rom
253 vga_setup();
Kevin O'Connor714325c2008-11-01 20:32:27 -0400254
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400255 // Do hardware initialization (if running synchronously)
256 if (!CONFIG_THREADS || !CONFIG_THREAD_OPTIONROMS) {
257 init_hw();
258 wait_threads();
259 }
Kevin O'Connora2e73802008-02-27 10:27:00 -0500260
Kevin O'Connor98032802009-12-09 20:18:31 -0500261 // Run option roms
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400262 optionrom_setup();
Kevin O'Connore54ee382009-07-26 19:33:13 -0400263
Kevin O'Connor969df602009-11-25 19:05:04 -0500264 // Run BCVs and show optional boot menu
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400265 boot_prep();
266
Kevin O'Connor969df602009-11-25 19:05:04 -0500267 // Finalize data structures before boot
Kevin O'Connord5d02b62010-06-06 16:18:03 -0400268 cdemu_setup();
Kevin O'Connore54ee382009-07-26 19:33:13 -0400269 pmm_finalize();
270 malloc_finalize();
271 memmap_finalize();
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400272
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 startBoot();
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500281}
282
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400283
284/****************************************************************
Kevin O'Connor87b533b2011-07-10 22:35:07 -0400285 * POST entry and code relocation
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400286 ****************************************************************/
287
288// Update given relocs for the code at 'dest' with a given 'delta'
289static void
290updateRelocs(void *dest, u32 *rstart, u32 *rend, u32 delta)
291{
292 u32 *reloc;
293 for (reloc = rstart; reloc < rend; reloc++)
294 *((u32*)(dest + *reloc)) += delta;
295}
296
Kevin O'Connor87b533b2011-07-10 22:35:07 -0400297// Relocate init code and then call maininit() at new address.
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400298static void
299reloc_init(void)
300{
301 if (!CONFIG_RELOCATE_INIT) {
302 maininit();
303 return;
304 }
305 // Symbols populated by the build.
306 extern u8 code32flat_start[];
307 extern u8 _reloc_min_align[];
308 extern u32 _reloc_abs_start[], _reloc_abs_end[];
309 extern u32 _reloc_rel_start[], _reloc_rel_end[];
310 extern u32 _reloc_init_start[], _reloc_init_end[];
311 extern u8 code32init_start[], code32init_end[];
312
313 // Allocate space for init code.
314 u32 initsize = code32init_end - code32init_start;
315 u32 align = (u32)&_reloc_min_align;
316 void *dest = memalign_tmp(align, initsize);
317 if (!dest)
318 panic("No space for init relocation.\n");
319
320 // Copy code and update relocs (init absolute, init relative, and runtime)
321 dprintf(1, "Relocating init from %p to %p (size %d)\n"
322 , code32init_start, dest, initsize);
323 s32 delta = dest - (void*)code32init_start;
324 memcpy(dest, code32init_start, initsize);
325 updateRelocs(dest, _reloc_abs_start, _reloc_abs_end, delta);
326 updateRelocs(dest, _reloc_rel_start, _reloc_rel_end, -delta);
327 updateRelocs(code32flat_start, _reloc_init_start, _reloc_init_end, delta);
328
329 // Call maininit() in relocated code.
330 void (*func)(void) = (void*)maininit + delta;
331 barrier();
332 func();
333}
334
Kevin O'Connor9acdc282011-09-20 19:42:14 -0400335// Setup for code relocation and then call reloc_init
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400336void VISIBLE32INIT
Kevin O'Connor9acdc282011-09-20 19:42:14 -0400337dopost(void)
338{
339 HaveRunPost = 1;
340
341 // Detect ram and setup internal malloc.
342 qemu_cfg_port_probe();
343 ram_probe();
344 malloc_setup();
345
346 // Relocate initialization code and call maininit().
347 reloc_init();
348}
349
350// Entry point for Power On Self Test (POST) - the BIOS initilization
351// phase. This function makes the memory at 0xc0000-0xfffff
352// read/writable and then calls dopost().
353void VISIBLE32FLAT
Kevin O'Connor87b533b2011-07-10 22:35:07 -0400354handle_post(void)
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400355{
Kevin O'Connor61d6b062008-06-21 12:15:10 -0400356 debug_serial_setup();
Kevin O'Connorc95d2ce2009-07-29 20:41:39 -0400357 dprintf(1, "Start bios (version %s)\n", VERSION);
Kevin O'Connorda4a6482008-06-08 13:48:06 -0400358
Kevin O'Connor87b533b2011-07-10 22:35:07 -0400359 // Enable CPU caching
360 setcr0(getcr0() & ~(CR0_CD|CR0_NW));
361
362 // Clear CMOS reboot flag.
363 outb_cmos(0, CMOS_RESET_CODE);
364
365 // Make sure legacy DMA isn't running.
366 init_dma();
Kevin O'Connoradaf3732010-09-13 20:22:07 -0400367
Ian Campbell74c78782011-06-01 11:00:29 +0100368 // Check if we are running under Xen.
369 xen_probe();
370
Kevin O'Connora8999452010-09-25 12:48:43 -0400371 // Allow writes to modify bios area (0xf0000)
372 make_bios_writable();
Kevin O'Connora8999452010-09-25 12:48:43 -0400373
Kevin O'Connor9acdc282011-09-20 19:42:14 -0400374 // Now that memory is read/writable - start post process.
375 dopost();
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500376}