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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'Connor8a0a9722013-01-21 01:53:31 -05003// Copyright (C) 2008-2013 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
Kevin O'Connor392d2aa2013-09-15 00:14:28 -04008#include "biosvar.h" // SET_BDA
Kevin O'Connor2d2fa312013-09-14 21:55:26 -04009#include "bregs.h" // struct bregs
10#include "config.h" // CONFIG_*
Kevin O'Connorccee6e82013-09-02 21:25:21 -040011#include "fw/paravirt.h" // qemu_cfg_preinit
12#include "fw/xen.h" // xen_preinit
Kevin O'Connor2d2fa312013-09-14 21:55:26 -040013#include "hw/ahci.h" // ahci_setup
14#include "hw/ata.h" // ata_setup
15#include "hw/cmos.h" // CMOS_*
16#include "hw/esp-scsi.h" // esp_scsi_setup
17#include "hw/lsi-scsi.h" // lsi_scsi_setup
18#include "hw/megasas.h" // megasas_setup
19#include "hw/pic.h" // pic_setup
Kevin O'Connor5d369d82013-09-02 20:48:46 -040020#include "hw/ps2port.h" // ps2port_setup
Kevin O'Connor2d2fa312013-09-14 21:55:26 -040021#include "hw/usb.h" // usb_setup
Kevin O'Connor5d369d82013-09-02 20:48:46 -040022#include "hw/virtio-blk.h" // virtio_blk_setup
23#include "hw/virtio-scsi.h" // virtio_scsi_setup
Kevin O'Connor9dea5902013-09-14 20:23:54 -040024#include "malloc.h" // malloc_init
Kevin O'Connor2d2fa312013-09-14 21:55:26 -040025#include "memmap.h" // add_e820
26#include "output.h" // dprintf
Kevin O'Connorfa9c66a2013-09-14 19:10:40 -040027#include "string.h" // memset
Kevin O'Connor2d2fa312013-09-14 21:55:26 -040028#include "util.h" // kbd_init
Kevin O'Connor025cabd2010-09-15 21:59:11 -040029
Kevin O'Connor8a0a9722013-01-21 01:53:31 -050030
Kevin O'Connor025cabd2010-09-15 21:59:11 -040031/****************************************************************
Kevin O'Connor6ca04602013-01-21 11:38:49 -050032 * BIOS initialization and hardware setup
Kevin O'Connor025cabd2010-09-15 21:59:11 -040033 ****************************************************************/
34
Kevin O'Connore3677b12008-07-04 15:29:23 -040035static void
Kevin O'Connord83c87b2013-01-21 01:14:12 -050036ivt_init(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'Connor9e4d41c2013-01-21 12:14:29 -050040 // Setup reset-vector entry point (controls legacy reboots).
41 HaveRunPost = 1;
42 outb_cmos(0, CMOS_RESET_CODE);
43
Kevin O'Connord67a7032009-01-17 19:37:26 -050044 // Initialize all vectors to the default handler.
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050045 int i;
Kevin O'Connore3677b12008-07-04 15:29:23 -040046 for (i=0; i<256; i++)
Kevin O'Connorcc9e1bf2010-07-28 21:31:38 -040047 SET_IVT(i, FUNC16(entry_iret_official));
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050048
Kevin O'Connord21c0892008-11-26 17:02:43 -050049 // Initialize all hw vectors to a default hw handler.
Kevin O'Connorf465e1e2013-02-23 21:33:36 -050050 for (i=BIOS_HWIRQ0_VECTOR; i<BIOS_HWIRQ0_VECTOR+8; i++)
Kevin O'Connorcc9e1bf2010-07-28 21:31:38 -040051 SET_IVT(i, FUNC16(entry_hwpic1));
Kevin O'Connorf465e1e2013-02-23 21:33:36 -050052 for (i=BIOS_HWIRQ8_VECTOR; i<BIOS_HWIRQ8_VECTOR+8; i++)
Kevin O'Connorcc9e1bf2010-07-28 21:31:38 -040053 SET_IVT(i, FUNC16(entry_hwpic2));
Kevin O'Connord21c0892008-11-26 17:02:43 -050054
55 // Initialize software handlers.
Kevin O'Connorcc9e1bf2010-07-28 21:31:38 -040056 SET_IVT(0x02, FUNC16(entry_02));
57 SET_IVT(0x10, FUNC16(entry_10));
58 SET_IVT(0x11, FUNC16(entry_11));
59 SET_IVT(0x12, FUNC16(entry_12));
60 SET_IVT(0x13, FUNC16(entry_13_official));
61 SET_IVT(0x14, FUNC16(entry_14));
62 SET_IVT(0x15, FUNC16(entry_15));
63 SET_IVT(0x16, FUNC16(entry_16));
64 SET_IVT(0x17, FUNC16(entry_17));
65 SET_IVT(0x18, FUNC16(entry_18));
66 SET_IVT(0x19, FUNC16(entry_19_official));
Kevin O'Connor922aa1b2013-03-02 04:02:11 -050067 SET_IVT(0x1a, FUNC16(entry_1a_official));
Kevin O'Connorcc9e1bf2010-07-28 21:31:38 -040068 SET_IVT(0x40, FUNC16(entry_40));
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050069
Kevin O'Connorb164d2c2009-12-26 23:24:52 -050070 // INT 60h-66h reserved for user interrupt
71 for (i=0x60; i<=0x66; i++)
72 SET_IVT(i, SEGOFF(0, 0));
73
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050074 // set vector 0x79 to zero
75 // this is used by 'gardian angel' protection system
Kevin O'Connor9f985422009-09-09 11:34:39 -040076 SET_IVT(0x79, SEGOFF(0, 0));
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050077}
78
79static void
Kevin O'Connord83c87b2013-01-21 01:14:12 -050080bda_init(void)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050081{
Kevin O'Connor8c0e3722009-01-02 14:19:43 -050082 dprintf(3, "init bda\n");
83
Kevin O'Connor35ae7262009-01-19 15:44:44 -050084 struct bios_data_area_s *bda = MAKE_FLATPTR(SEG_BDA, 0);
Kevin O'Connor8c0e3722009-01-02 14:19:43 -050085 memset(bda, 0, sizeof(*bda));
86
Kevin O'Connor49553a42009-05-17 10:31:34 -040087 int esize = EBDA_SIZE_START;
Kevin O'Connor025cabd2010-09-15 21:59:11 -040088 u16 ebda_seg = EBDA_SEGMENT_START;
Kevin O'Connor2b0fb8c2013-08-07 23:03:47 -040089 extern u8 final_varlow_start[];
90 if (!CONFIG_MALLOC_UPPERMEMORY)
91 ebda_seg = FLATPTR_TO_SEG(ALIGN_DOWN((u32)final_varlow_start, 1024)
92 - EBDA_SIZE_START*1024);
Kevin O'Connor025cabd2010-09-15 21:59:11 -040093 SET_BDA(ebda_seg, ebda_seg);
Kevin O'Connor4d7c37e2008-12-26 23:50:17 -050094
Kevin O'Connor2b0fb8c2013-08-07 23:03:47 -040095 SET_BDA(mem_size_kb, ebda_seg / (1024/16));
96
Kevin O'Connor9becbf12009-07-12 09:29:46 -040097 // Init ebda
Kevin O'Connor4d7c37e2008-12-26 23:50:17 -050098 struct extended_bios_data_area_s *ebda = get_ebda_ptr();
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -050099 memset(ebda, 0, sizeof(*ebda));
Kevin O'Connor4d7c37e2008-12-26 23:50:17 -0500100 ebda->size = esize;
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400101
Kevin O'Connor2b0fb8c2013-08-07 23:03:47 -0400102 add_e820((u32)ebda, BUILD_LOWRAM_END-(u32)ebda, E820_RESERVED);
Kevin O'Connorbf2e8c22012-05-28 12:59:58 -0400103
104 // Init extra stack
Kevin O'Connorc9243442013-02-17 13:58:28 -0500105 StackPos = (void*)(&ExtraStack[BUILD_EXTRA_STACK_SIZE] - zonelow_base);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500106}
107
David Woodhousea2164512013-01-25 19:26:48 -0600108void
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500109interface_init(void)
Kevin O'Connor9571ac22008-05-17 22:20:27 -0400110{
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500111 // Running at new code address - do code relocation fixups
Kevin O'Connor6afc6f82013-02-19 01:02:50 -0500112 malloc_init();
Kevin O'Connorc7812932008-06-08 23:08:12 -0400113
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500114 // Setup romfile items.
Kevin O'Connorb840ba92013-02-09 20:09:22 -0500115 qemu_cfg_init();
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500116 coreboot_cbfs_init();
Kevin O'Connor59c35f22008-10-25 23:05:42 -0400117
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500118 // Setup ivt/bda/ebda
119 ivt_init();
120 bda_init();
Kevin O'Connor9571ac22008-05-17 22:20:27 -0400121
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500122 // Other interfaces
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500123 boot_init();
124 bios32_init();
125 pmm_init();
126 pnp_init();
127 kbd_init();
128 mouse_init();
Kevin O'Connor0525d292008-07-04 06:18:30 -0400129}
130
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400131// Initialize hardware devices
David Woodhousea2164512013-01-25 19:26:48 -0600132void
Kevin O'Connord83c87b2013-01-21 01:14:12 -0500133device_hardware_setup(void)
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400134{
135 usb_setup();
136 ps2port_setup();
137 lpt_setup();
138 serial_setup();
139
140 floppy_setup();
141 ata_setup();
Gerd Hoffmannd52fdf62010-11-29 09:42:13 +0100142 ahci_setup();
Kevin O'Connor89a1efd2011-01-08 12:24:39 -0500143 cbfs_payload_setup();
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400144 ramdisk_setup();
Gleb Natapov89acfa32010-05-10 11:36:37 +0300145 virtio_blk_setup();
Paolo Bonzinic5c488f2012-02-27 17:22:23 +0100146 virtio_scsi_setup();
Gerd Hoffmann9d6bac12012-07-20 10:59:25 +0200147 lsi_scsi_setup();
Paolo Bonzini7a39e722012-08-06 13:15:06 +0200148 esp_scsi_setup();
Hannes Reinecke2df70bf2012-11-13 15:03:31 +0100149 megasas_setup();
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400150}
151
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500152static void
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500153platform_hardware_setup(void)
154{
Kevin O'Connor9e4d41c2013-01-21 12:14:29 -0500155 // Enable CPU caching
156 setcr0(getcr0() & ~(CR0_CD|CR0_NW));
157
158 // Make sure legacy DMA isn't running.
159 dma_setup();
160
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500161 // Init base pc hardware.
162 pic_setup();
Kevin O'Connor3a735ba2013-02-10 00:35:01 -0500163 mathcp_setup();
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500164 timer_setup();
Kevin O'Connorc6e8c072013-07-20 10:51:58 -0400165 clock_setup();
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500166
Kevin O'Connora2a86e22013-02-13 19:35:12 -0500167 // Platform specific setup
168 qemu_platform_setup();
169 coreboot_platform_setup();
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500170}
171
David Woodhousea2164512013-01-25 19:26:48 -0600172void
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500173prepareboot(void)
174{
175 // Run BCVs
176 bcv_prepboot();
177
178 // Finalize data structures before boot
179 cdrom_prepboot();
180 pmm_prepboot();
181 malloc_prepboot();
182 memmap_prepboot();
183
184 // Setup bios checksum.
185 BiosChecksum -= checksum((u8*)BUILD_BIOS_ADDR, BUILD_BIOS_SIZE);
186}
187
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400188// Begin the boot process by invoking an int0x19 in 16bit mode.
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400189void VISIBLE32FLAT
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400190startBoot(void)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500191{
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400192 // Clear low-memory allocations (required by PMM spec).
193 memset((void*)BUILD_STACK_ADDR, 0, BUILD_EBDA_MINIMUM - BUILD_STACK_ADDR);
194
195 dprintf(3, "Jump to int19\n");
196 struct bregs br;
197 memset(&br, 0, sizeof(br));
198 br.flags = F_IF;
199 call16_int(0x19, &br);
200}
201
202// Main setup code.
203static void
204maininit(void)
205{
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500206 // Initialize internal interfaces.
207 interface_init();
Kevin O'Connor59d6ca52012-05-31 00:20:55 -0400208
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500209 // Setup platform devices.
210 platform_hardware_setup();
Kevin O'Connor98032802009-12-09 20:18:31 -0500211
Kevin O'Connor9f08c902013-02-10 00:25:53 -0500212 // Start hardware initialization (if optionrom threading)
213 if (CONFIG_THREAD_OPTIONROMS)
214 device_hardware_setup();
215
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400216 // Run vga option rom
Kevin O'Connord83c87b2013-01-21 01:14:12 -0500217 vgarom_setup();
Kevin O'Connor714325c2008-11-01 20:32:27 -0400218
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400219 // Do hardware initialization (if running synchronously)
Kevin O'Connorb5c7da62013-02-08 00:45:44 -0500220 if (!CONFIG_THREAD_OPTIONROMS) {
Kevin O'Connord83c87b2013-01-21 01:14:12 -0500221 device_hardware_setup();
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400222 wait_threads();
223 }
Kevin O'Connora2e73802008-02-27 10:27:00 -0500224
Kevin O'Connor98032802009-12-09 20:18:31 -0500225 // Run option roms
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400226 optionrom_setup();
Kevin O'Connore54ee382009-07-26 19:33:13 -0400227
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500228 // Allow user to modify overall boot order.
229 interactive_bootmenu();
230 wait_threads();
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400231
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500232 // Prepare for boot.
233 prepareboot();
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400234
235 // Write protect bios memory.
236 make_bios_readonly();
237
238 // Invoke int 19 to start boot process.
239 startBoot();
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500240}
241
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400242
243/****************************************************************
Kevin O'Connor87b533b2011-07-10 22:35:07 -0400244 * POST entry and code relocation
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400245 ****************************************************************/
246
247// Update given relocs for the code at 'dest' with a given 'delta'
248static void
249updateRelocs(void *dest, u32 *rstart, u32 *rend, u32 delta)
250{
251 u32 *reloc;
252 for (reloc = rstart; reloc < rend; reloc++)
253 *((u32*)(dest + *reloc)) += delta;
254}
255
Kevin O'Connorbc628092013-02-05 20:57:10 -0500256// Relocate init code and then call a function at its new address.
257// The passed function should be in the "init" section and must not
258// return.
David Woodhousea2164512013-01-25 19:26:48 -0600259void __noreturn
Kevin O'Connorbc628092013-02-05 20:57:10 -0500260reloc_preinit(void *f, void *arg)
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400261{
Kevin O'Connorbc628092013-02-05 20:57:10 -0500262 void (*func)(void *) __noreturn = f;
263 if (!CONFIG_RELOCATE_INIT)
264 func(arg);
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400265 // Symbols populated by the build.
266 extern u8 code32flat_start[];
Kevin O'Connor46b82622012-05-13 12:10:30 -0400267 extern u8 _reloc_min_align;
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400268 extern u32 _reloc_abs_start[], _reloc_abs_end[];
269 extern u32 _reloc_rel_start[], _reloc_rel_end[];
270 extern u32 _reloc_init_start[], _reloc_init_end[];
271 extern u8 code32init_start[], code32init_end[];
272
273 // Allocate space for init code.
274 u32 initsize = code32init_end - code32init_start;
Kevin O'Connor46b82622012-05-13 12:10:30 -0400275 u32 codealign = (u32)&_reloc_min_align;
276 void *codedest = memalign_tmp(codealign, initsize);
Kevin O'Connorc91da7a2012-06-08 21:14:19 -0400277 if (!codedest)
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400278 panic("No space for init relocation.\n");
279
280 // Copy code and update relocs (init absolute, init relative, and runtime)
281 dprintf(1, "Relocating init from %p to %p (size %d)\n"
Kevin O'Connor46b82622012-05-13 12:10:30 -0400282 , code32init_start, codedest, initsize);
283 s32 delta = codedest - (void*)code32init_start;
284 memcpy(codedest, code32init_start, initsize);
285 updateRelocs(codedest, _reloc_abs_start, _reloc_abs_end, delta);
286 updateRelocs(codedest, _reloc_rel_start, _reloc_rel_end, -delta);
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400287 updateRelocs(code32flat_start, _reloc_init_start, _reloc_init_end, delta);
Kevin O'Connorbc628092013-02-05 20:57:10 -0500288 if (f >= (void*)code32init_start && f < (void*)code32init_end)
289 func = f + delta;
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400290
Kevin O'Connorbc628092013-02-05 20:57:10 -0500291 // Call function in relocated code.
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400292 barrier();
Kevin O'Connorbc628092013-02-05 20:57:10 -0500293 func(arg);
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400294}
295
Kevin O'Connor6ca04602013-01-21 11:38:49 -0500296// Setup for code relocation and then relocate.
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400297void VISIBLE32INIT
Kevin O'Connor9acdc282011-09-20 19:42:14 -0400298dopost(void)
299{
Kevin O'Connor6ca04602013-01-21 11:38:49 -0500300 // Detect ram and setup internal malloc.
Kevin O'Connora2a86e22013-02-13 19:35:12 -0500301 qemu_preinit();
302 coreboot_preinit();
Kevin O'Connor6ca04602013-01-21 11:38:49 -0500303 malloc_preinit();
304
305 // Relocate initialization code and call maininit().
306 reloc_preinit(maininit, NULL);
307}
308
Kevin O'Connorb1885fc2013-02-08 21:00:46 -0500309// Entry point for Power On Self Test (POST) - the BIOS initilization
310// phase. This function makes the memory at 0xc0000-0xfffff
311// read/writable and then calls dopost().
Kevin O'Connor6ca04602013-01-21 11:38:49 -0500312void VISIBLE32FLAT
313handle_post(void)
314{
Kevin O'Connor4cf20672013-02-18 11:49:53 -0500315 if (!CONFIG_QEMU && !CONFIG_COREBOOT)
316 return;
317
Kevin O'Connorb1885fc2013-02-08 21:00:46 -0500318 debug_serial_preinit();
319 dprintf(1, "Start bios (version %s)\n", VERSION);
320
321 // Check if we are running under Xen.
322 xen_preinit();
Kevin O'Connor6ca04602013-01-21 11:38:49 -0500323
Kevin O'Connora8999452010-09-25 12:48:43 -0400324 // Allow writes to modify bios area (0xf0000)
325 make_bios_writable();
Kevin O'Connora8999452010-09-25 12:48:43 -0400326
Kevin O'Connor9acdc282011-09-20 19:42:14 -0400327 // Now that memory is read/writable - start post process.
328 dopost();
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500329}