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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'Connorc167e542015-09-29 09:40:46 -040011#include "e820map.h" // e820_add
Kevin O'Connorccee6e82013-09-02 21:25:21 -040012#include "fw/paravirt.h" // qemu_cfg_preinit
13#include "fw/xen.h" // xen_preinit
Kevin O'Connor2d2fa312013-09-14 21:55:26 -040014#include "hw/ahci.h" // ahci_setup
15#include "hw/ata.h" // ata_setup
Kevin O'Connor2d2fa312013-09-14 21:55:26 -040016#include "hw/esp-scsi.h" // esp_scsi_setup
17#include "hw/lsi-scsi.h" // lsi_scsi_setup
18#include "hw/megasas.h" // megasas_setup
Evgeny Budilovsky83d60b32013-10-14 18:03:36 +030019#include "hw/pvscsi.h" // pvscsi_setup
Kevin O'Connor2d2fa312013-09-14 21:55:26 -040020#include "hw/pic.h" // pic_setup
Kevin O'Connor5d369d82013-09-02 20:48:46 -040021#include "hw/ps2port.h" // ps2port_setup
Kevin O'Connor8b7861c2013-09-15 02:29:06 -040022#include "hw/rtc.h" // rtc_write
Kevin O'Connor940fc1f2014-01-15 13:42:50 -050023#include "hw/serialio.h" // serial_debug_preinit
Kevin O'Connor2d2fa312013-09-14 21:55:26 -040024#include "hw/usb.h" // usb_setup
Kevin O'Connor5d369d82013-09-02 20:48:46 -040025#include "hw/virtio-blk.h" // virtio_blk_setup
26#include "hw/virtio-scsi.h" // virtio_scsi_setup
Kevin O'Connor9dea5902013-09-14 20:23:54 -040027#include "malloc.h" // malloc_init
Kevin O'Connor5d912262015-10-08 11:18:17 -040028#include "memmap.h" // SYMBOL
Kevin O'Connor2d2fa312013-09-14 21:55:26 -040029#include "output.h" // dprintf
Kevin O'Connorfa9c66a2013-09-14 19:10:40 -040030#include "string.h" // memset
Kevin O'Connor2d2fa312013-09-14 21:55:26 -040031#include "util.h" // kbd_init
Stefan Bergerb310dfa2015-03-23 14:22:16 -040032#include "tcgbios.h" // tpm_*
Kevin O'Connor025cabd2010-09-15 21:59:11 -040033
Kevin O'Connor8a0a9722013-01-21 01:53:31 -050034
Kevin O'Connor025cabd2010-09-15 21:59:11 -040035/****************************************************************
Kevin O'Connor6ca04602013-01-21 11:38:49 -050036 * BIOS initialization and hardware setup
Kevin O'Connor025cabd2010-09-15 21:59:11 -040037 ****************************************************************/
38
Kevin O'Connore3677b12008-07-04 15:29:23 -040039static void
Kevin O'Connord83c87b2013-01-21 01:14:12 -050040ivt_init(void)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050041{
Kevin O'Connor8c0e3722009-01-02 14:19:43 -050042 dprintf(3, "init ivt\n");
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050043
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));
Kevin O'Connor3fcabf02014-05-08 18:32:32 -040062 SET_IVT(0x15, FUNC16(entry_15_official));
Kevin O'Connorcc9e1bf2010-07-28 21:31:38 -040063 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 if (!CONFIG_MALLOC_UPPERMEMORY)
Kevin O'Connor5d912262015-10-08 11:18:17 -040090 ebda_seg = FLATPTR_TO_SEG(ALIGN_DOWN(SYMBOL(final_varlow_start), 1024)
Kevin O'Connor2b0fb8c2013-08-07 23:03:47 -040091 - EBDA_SIZE_START*1024);
Kevin O'Connor025cabd2010-09-15 21:59:11 -040092 SET_BDA(ebda_seg, ebda_seg);
Kevin O'Connor4d7c37e2008-12-26 23:50:17 -050093
Kevin O'Connor2b0fb8c2013-08-07 23:03:47 -040094 SET_BDA(mem_size_kb, ebda_seg / (1024/16));
95
Kevin O'Connor9becbf12009-07-12 09:29:46 -040096 // Init ebda
Kevin O'Connor4d7c37e2008-12-26 23:50:17 -050097 struct extended_bios_data_area_s *ebda = get_ebda_ptr();
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -050098 memset(ebda, 0, sizeof(*ebda));
Kevin O'Connor4d7c37e2008-12-26 23:50:17 -050099 ebda->size = esize;
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400100
Kevin O'Connorc167e542015-09-29 09:40:46 -0400101 e820_add((u32)ebda, BUILD_LOWRAM_END-(u32)ebda, E820_RESERVED);
Kevin O'Connorbf2e8c22012-05-28 12:59:58 -0400102
103 // Init extra stack
Kevin O'Connor5d912262015-10-08 11:18:17 -0400104 StackPos = &ExtraStack[BUILD_EXTRA_STACK_SIZE] - SYMBOL(zonelow_base);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500105}
106
David Woodhousea2164512013-01-25 19:26:48 -0600107void
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500108interface_init(void)
Kevin O'Connor9571ac22008-05-17 22:20:27 -0400109{
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500110 // Running at new code address - do code relocation fixups
Kevin O'Connor6afc6f82013-02-19 01:02:50 -0500111 malloc_init();
Kevin O'Connorc7812932008-06-08 23:08:12 -0400112
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500113 // Setup romfile items.
Kevin O'Connorb840ba92013-02-09 20:09:22 -0500114 qemu_cfg_init();
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500115 coreboot_cbfs_init();
Vladimir Serbinenko1b911d72015-05-18 19:07:16 +0200116 multiboot_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'Connor72691a52014-12-16 09:55:16 -0500143 sdcard_setup();
Kevin O'Connor89a1efd2011-01-08 12:24:39 -0500144 cbfs_payload_setup();
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400145 ramdisk_setup();
Gleb Natapov89acfa32010-05-10 11:36:37 +0300146 virtio_blk_setup();
Paolo Bonzinic5c488f2012-02-27 17:22:23 +0100147 virtio_scsi_setup();
Gerd Hoffmann9d6bac12012-07-20 10:59:25 +0200148 lsi_scsi_setup();
Paolo Bonzini7a39e722012-08-06 13:15:06 +0200149 esp_scsi_setup();
Hannes Reinecke2df70bf2012-11-13 15:03:31 +0100150 megasas_setup();
Evgeny Budilovsky83d60b32013-10-14 18:03:36 +0300151 pvscsi_setup();
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400152}
153
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500154static void
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500155platform_hardware_setup(void)
156{
Kevin O'Connor9e4d41c2013-01-21 12:14:29 -0500157 // Make sure legacy DMA isn't running.
158 dma_setup();
159
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500160 // Init base pc hardware.
161 pic_setup();
Kevin O'Connor8b9942f2015-07-14 15:44:26 -0400162 thread_setup();
Kevin O'Connor3a735ba2013-02-10 00:35:01 -0500163 mathcp_setup();
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500164
Kevin O'Connora2a86e22013-02-13 19:35:12 -0500165 // Platform specific setup
166 qemu_platform_setup();
167 coreboot_platform_setup();
Kevin O'Connord6aca442015-06-10 11:00:17 -0400168
Kevin O'Connorbbb3fba2015-07-22 16:06:27 -0400169 // Setup timers and periodic clock interrupt
170 timer_setup();
171 clock_setup();
172
Kevin O'Connord6aca442015-06-10 11:00:17 -0400173 // Initialize TPM
174 tpm_setup();
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500175}
176
David Woodhousea2164512013-01-25 19:26:48 -0600177void
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500178prepareboot(void)
179{
Kevin O'Connord6aca442015-06-10 11:00:17 -0400180 // Change TPM phys. presence state befor leaving BIOS
181 tpm_prepboot();
182
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500183 // Run BCVs
184 bcv_prepboot();
185
186 // Finalize data structures before boot
187 cdrom_prepboot();
188 pmm_prepboot();
189 malloc_prepboot();
Kevin O'Connorc167e542015-09-29 09:40:46 -0400190 e820_prepboot();
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500191
Kevin O'Connor6c68e7a2014-04-19 12:22:22 -0400192 HaveRunPost = 2;
193
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500194 // Setup bios checksum.
195 BiosChecksum -= checksum((u8*)BUILD_BIOS_ADDR, BUILD_BIOS_SIZE);
196}
197
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400198// Begin the boot process by invoking an int0x19 in 16bit mode.
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400199void VISIBLE32FLAT
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400200startBoot(void)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500201{
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400202 // Clear low-memory allocations (required by PMM spec).
203 memset((void*)BUILD_STACK_ADDR, 0, BUILD_EBDA_MINIMUM - BUILD_STACK_ADDR);
204
205 dprintf(3, "Jump to int19\n");
206 struct bregs br;
207 memset(&br, 0, sizeof(br));
208 br.flags = F_IF;
209 call16_int(0x19, &br);
210}
211
212// Main setup code.
213static void
214maininit(void)
215{
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500216 // Initialize internal interfaces.
217 interface_init();
Kevin O'Connor59d6ca52012-05-31 00:20:55 -0400218
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500219 // Setup platform devices.
220 platform_hardware_setup();
Kevin O'Connor98032802009-12-09 20:18:31 -0500221
Kevin O'Connord29ce622014-04-07 12:15:34 -0400222 // Start hardware initialization (if threads allowed during optionroms)
223 if (threads_during_optionroms())
Kevin O'Connor9f08c902013-02-10 00:25:53 -0500224 device_hardware_setup();
225
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400226 // Run vga option rom
Kevin O'Connord83c87b2013-01-21 01:14:12 -0500227 vgarom_setup();
Kevin O'Connor714325c2008-11-01 20:32:27 -0400228
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400229 // Do hardware initialization (if running synchronously)
Kevin O'Connord29ce622014-04-07 12:15:34 -0400230 if (!threads_during_optionroms()) {
Kevin O'Connord83c87b2013-01-21 01:14:12 -0500231 device_hardware_setup();
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400232 wait_threads();
233 }
Kevin O'Connora2e73802008-02-27 10:27:00 -0500234
Kevin O'Connor98032802009-12-09 20:18:31 -0500235 // Run option roms
Kevin O'Connore438b0c2010-05-01 12:20:33 -0400236 optionrom_setup();
Kevin O'Connore54ee382009-07-26 19:33:13 -0400237
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500238 // Allow user to modify overall boot order.
239 interactive_bootmenu();
240 wait_threads();
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400241
Kevin O'Connor8a0a9722013-01-21 01:53:31 -0500242 // Prepare for boot.
243 prepareboot();
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400244
245 // Write protect bios memory.
246 make_bios_readonly();
247
248 // Invoke int 19 to start boot process.
249 startBoot();
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500250}
251
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400252
253/****************************************************************
Kevin O'Connor87b533b2011-07-10 22:35:07 -0400254 * POST entry and code relocation
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400255 ****************************************************************/
256
257// Update given relocs for the code at 'dest' with a given 'delta'
258static void
259updateRelocs(void *dest, u32 *rstart, u32 *rend, u32 delta)
260{
261 u32 *reloc;
262 for (reloc = rstart; reloc < rend; reloc++)
263 *((u32*)(dest + *reloc)) += delta;
264}
265
Kevin O'Connorbc628092013-02-05 20:57:10 -0500266// Relocate init code and then call a function at its new address.
267// The passed function should be in the "init" section and must not
268// return.
David Woodhousea2164512013-01-25 19:26:48 -0600269void __noreturn
Kevin O'Connorbc628092013-02-05 20:57:10 -0500270reloc_preinit(void *f, void *arg)
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400271{
Kevin O'Connorbc628092013-02-05 20:57:10 -0500272 void (*func)(void *) __noreturn = f;
273 if (!CONFIG_RELOCATE_INIT)
274 func(arg);
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400275
276 // Allocate space for init code.
Kevin O'Connor5d912262015-10-08 11:18:17 -0400277 u32 initsize = SYMBOL(code32init_end) - SYMBOL(code32init_start);
278 u32 codealign = SYMBOL(_reloc_min_align);
Kevin O'Connor46b82622012-05-13 12:10:30 -0400279 void *codedest = memalign_tmp(codealign, initsize);
Kevin O'Connor5d912262015-10-08 11:18:17 -0400280 void *codesrc = VSYMBOL(code32init_start);
Kevin O'Connorc91da7a2012-06-08 21:14:19 -0400281 if (!codedest)
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400282 panic("No space for init relocation.\n");
283
284 // Copy code and update relocs (init absolute, init relative, and runtime)
285 dprintf(1, "Relocating init from %p to %p (size %d)\n"
Kevin O'Connor5d912262015-10-08 11:18:17 -0400286 , codesrc, codedest, initsize);
287 s32 delta = codedest - codesrc;
288 memcpy(codedest, codesrc, initsize);
289 updateRelocs(codedest, VSYMBOL(_reloc_abs_start), VSYMBOL(_reloc_abs_end)
290 , delta);
291 updateRelocs(codedest, VSYMBOL(_reloc_rel_start), VSYMBOL(_reloc_rel_end)
292 , -delta);
293 updateRelocs(VSYMBOL(code32flat_start), VSYMBOL(_reloc_init_start)
294 , VSYMBOL(_reloc_init_end), delta);
295 if (f >= codesrc && f < VSYMBOL(code32init_end))
Kevin O'Connorbc628092013-02-05 20:57:10 -0500296 func = f + delta;
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400297
Kevin O'Connorbc628092013-02-05 20:57:10 -0500298 // Call function in relocated code.
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400299 barrier();
Kevin O'Connorbc628092013-02-05 20:57:10 -0500300 func(arg);
Kevin O'Connor7f55fd32010-09-25 11:34:06 -0400301}
302
Kevin O'Connora48f6022016-01-12 14:22:33 -0500303// Runs after all code is present and prior to any modifications
304void
305code_mutable_preinit(void)
306{
307 if (HaveRunPost)
308 // Already run
309 return;
310 // Setup reset-vector entry point (controls legacy reboots).
311 rtc_write(CMOS_RESET_CODE, 0);
312 barrier();
313 HaveRunPost = 1;
314 barrier();
315}
316
Kevin O'Connor6ca04602013-01-21 11:38:49 -0500317// Setup for code relocation and then relocate.
Kevin O'Connor025cabd2010-09-15 21:59:11 -0400318void VISIBLE32INIT
Kevin O'Connor9acdc282011-09-20 19:42:14 -0400319dopost(void)
320{
Kevin O'Connora48f6022016-01-12 14:22:33 -0500321 code_mutable_preinit();
322
Kevin O'Connor6ca04602013-01-21 11:38:49 -0500323 // Detect ram and setup internal malloc.
Kevin O'Connora2a86e22013-02-13 19:35:12 -0500324 qemu_preinit();
325 coreboot_preinit();
Kevin O'Connor6ca04602013-01-21 11:38:49 -0500326 malloc_preinit();
327
328 // Relocate initialization code and call maininit().
329 reloc_preinit(maininit, NULL);
330}
331
Kevin O'Connorb1885fc2013-02-08 21:00:46 -0500332// Entry point for Power On Self Test (POST) - the BIOS initilization
333// phase. This function makes the memory at 0xc0000-0xfffff
334// read/writable and then calls dopost().
Kevin O'Connor6ca04602013-01-21 11:38:49 -0500335void VISIBLE32FLAT
336handle_post(void)
337{
Kevin O'Connor4cf20672013-02-18 11:49:53 -0500338 if (!CONFIG_QEMU && !CONFIG_COREBOOT)
339 return;
340
Kevin O'Connor940fc1f2014-01-15 13:42:50 -0500341 serial_debug_preinit();
Kevin O'Connorbb1fcb42014-01-15 13:52:14 -0500342 debug_banner();
Kevin O'Connorb1885fc2013-02-08 21:00:46 -0500343
344 // Check if we are running under Xen.
345 xen_preinit();
Kevin O'Connor6ca04602013-01-21 11:38:49 -0500346
Kevin O'Connora8999452010-09-25 12:48:43 -0400347 // Allow writes to modify bios area (0xf0000)
348 make_bios_writable();
Kevin O'Connora8999452010-09-25 12:48:43 -0400349
Kevin O'Connor9acdc282011-09-20 19:42:14 -0400350 // Now that memory is read/writable - start post process.
351 dopost();
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500352}