WebSVN – freemyipod – Blame – /embios/trunk/loader/ipodclassic/main.S

Rev	Author	Line No.	Line
273	theseven	1	`@`
		2	`@`
		3	`@ emBIOS Loader for iPod Nano 3G`
		4	`@`
		5	`@ Copyright 2010 TheSeven`
		6	`@`
		7	`@`
		8	`@ This file is part of emBIOS.`
		9	`@`
		10	`@ emBIOS is free software: you can redistribute it and/or`
		11	`@ modify it under the terms of the GNU General Public License as`
		12	`@ published by the Free Software Foundation, either version 2 of the`
		13	`@ License, or (at your option) any later version.`
		14	`@`
		15	`@ emBIOS is distributed in the hope that it will be useful,`
		16	`@ but WITHOUT ANY WARRANTY; without even the implied warranty of`
		17	`@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.`
		18	`@ See the GNU General Public License for more details.`
		19	`@`
		20	`@ You should have received a copy of the GNU General Public License along`
		21	`@ with emBIOS. If not, see <http://www.gnu.org/licenses/>.`
		22	`@`
		23	`@`
		24
		25
		26	`#include "build/version.h"`
		27
		28
		29	`.global _start`
		30	`_start:`
		31
		32	`msr cpsr_c, #0xd3`
		33	`mrc p15, 0, r0,c1,c0`
		34	`bic r0, r0, #1`
		35	`mcr p15, 0, r0,c1,c0`
		36	`mov r0, #0`
		37	`mcr p15, 0, r0,c7,c5`
		38	`mcr p15, 0, r0,c8,c7`
		39	`mcr p15, 0, r0,c13,c0`
		40	`adr lr, cacheflush_done`
		41	`flushcache:`
		42	`mrc p15, 0, r15,c7,c14,3`
		43	`bne flushcache`
		44	`mov r0, #0`
		45	`mcr p15, 0, r0,c7,c10,4`
		46	`bx lr`
		47	`cacheflush_done:`
		48	`adr sp, values1`
		49	`ldmia sp!, {r4-r12}`
		50	`mcr p15, 0, r11,c2,c0`
		51	`mov r0, #-1`
		52	`mcr p15, 0, r0,c3,c0`
		53	`mmuloop:`
		54	`str r12, [r11], #4`
		55	`add r12, r12, #0x00100000`
		56	`cmp r12, #0x38000000`
		57	`biccs r12, r12, #0xc`
		58	`tst r12, #0x40000000`
		59	`beq mmuloop`
		60	`mcr p15, 0, r10,c1,c0`
		61	`dmaloop:`
		62	`add r8, r8, #0x10`
		63	`bic r9, r9, r4`
		64	`cmp r4, r5`
		65	`movcs r4, r5`
		66	`movcs r8, #0`
		67	`orr r9, r9, r4`
		68	`stmia r11!, {r6-r9}`
		69	`add r6, r6, r4,lsl#1`
		70	`subs r5, r5, r4`
		71	`bne dmaloop`
		72	`ldmia sp!, {r0-r12} @ R0 = SYSCONBASE (temporary)`
		73	`str r1, [r0,#0x48]`
		74	`str r2, [r0,#0x4c]`
		75	`mov r2, #0 @ R2 = 0`
		76	`str r2, [r0]`
		77	`str r2, [r0,#0x4]`
		78	`mov r1, #7`
		79	`str r1, [r0,#0x44]`
		80	`mov r1, #0x30`
		81	`str r1, [r0,#0x44]`
		82	`str r2, [r0,#0x60]`
		83	`str r3, [r0,#0x28]`
		84	`str r4, [r0,#0x38]`
		85	`mov r1, #0x34`
		86	`str r1, [r0,#0x44]`
		87	`orr r1, r1, #0x40000`
		88	`str r1, [r0,#0x44]`
		89	`waitpll:`
		90	`ldr r1, [r0,#0x40]`
		91	`tst r1, #4`
		92	`beq waitpll`
		93	`str r5, [r0,#0x04]`
		94	`mov r1, #0x3000`
		95	`str r1, [r0]`
		96	`mov r1, #0x8000`
		97	`orr r3, r1, #0x80000000`
		98	`str r3, [r0,#0x8]`
		99	`str r3, [r0,#0xc]`
		100	`str r1, [r0,#0x10]`
		101	`str r1, [r0,#0x14]`
		102	`mov r3, #3`
		103	`str r3, [r6]`
		104	`orr r1, r0, #0x00200000 @ R1 = TIMERBASE`
		105	`mov r4, #0x440`
		106	`str r4, [r1,#0xa0]`
		107	`mov r4, #0xb`
		108	`str r4, [r1,#0xb0]`
		109	`mvn r4, r2`
		110	`str r4, [r1,#0xa8]`
		111	`str r3, [r1,#0xa4]`
		112	`orr r3, r1, #0x00800000 @ R3 = GPIOBASE (temporary)`
		113	`gpioloop:`
		114	`ldr r4, [sp], #4`
		115	`str r4, [r3], #0xc`
		116	`str r2, [r3], #0x4`
		117	`str r2, [r3], #0x10`
		118	`tst r3, #0x200`
		119	`beq gpioloop`
		120	`str r7, [r3]`
		121	`add r7, r7, #0x100`
		122	`str r7, [r3]`
		123	`ldr r7, [r3,#-0x30]`
		124	`bic r7, r7, #0x40`
		125	`str r7, [r3,#-0x30]`
		126	`ldr r7, [r3,#-0x34]`
		127	`orr r7, r7, #0x40`
		128	`str r7, [r3,#-0x34]`
		129	`add r5, r0, #0x00100000 @ R5 = I2CBASE`
		130	`bl i2cwaitrdy @ R3 = I2C address (temporary)`
		131	`mov r7, #0x40 @ R4 = I2C data (temporary)`
		132	`str r7, [r5,#8] @ R6 = I2C scratch register (temporary)`
		133	`bl i2cwaitrdy @ R7 = I2C return address (temporary)`
		134	`str r2, [r5,#0x14] @ R0 = coldboot flag (temporary)`
		135	`bl i2cwaitrdy`
		136	`str r2, [r5,#0x18]`
		137	`bl i2cwaitrdy`
		138	`mov r6, #0x80`
		139	`str r6, [r5,#0x4]`
		140	`bl i2cwaitrdy`
		141	`str r2, [r5]`
		142	`bl i2cwaitrdy`
		143	`str r2, [r5,#0x4]`
		144	`bl i2cwaitrdy`
		145	`str r7, [r5,#0xc]`
		146	`bl i2cwaitrdy`
		147	`mov r6, #0x184`
		148	`str r6, [r5]`
		149	`bl i2cwaitrdy`
		150	`mov r6, #0x10`
		151	`str r6, [r5,#0x4]`
		152	`bl i2cwaitrdy`
		153	`mov r3, #0x16`
		154	`mvn r4, r2`
		155	`bl pmutransfer`
		156	`and r0, r4, #7`
		157	`mov r3, #0xc`
		158	`mvn r4, r2`
		159	`bl pmutransfer`
		160	`and r4, r4, #8`
		161	`orr r0, r0, r4`
		162	`pmuloop:`
		163	`ldrb r3, [sp], #1`
		164	`ldrb r4, [sp], #1`
		165	`cmp r3, #0xff`
		166	`adrne lr, pmuloop`
		167	`bne pmutransfer`
		168	`mov r3, #0x19`
		169	`mvn r4, r2`
		170	`bl pmutransfer`
		171	`tst r4, #1`
		172	`beq pwrok`
		173	`mov r3, #0x4b`
		174	`mvn r4, r2`
		175	`bl pmutransfer`
		176	`tst r4, #4`
		177	`bne pwrok`
		178	`mov r3, #0x12`
		179	`mvn r4, r2`
		180	`bl pmutransfer`
		181	`tst r4, #4`
		182	`bne pwrok`
		183	`poweroff:`
		184	`mov r3, #0xc`
		185	`mov r4, #1`
		186	`bl pmutransfer`
		187	`b poweroff`
		188
		189	`values1:`
		190	`.word 0x00000FFF @ R4 - DMA maximum transfer size`
		191	`.word 0x00012C00 @ R5 - LCD framebuffer pixel count`
		192	`.word 0x22010000 @ R6 - LCD framebuffer address`
		193	`.word 0x38300040 @ R7 - LCD data port address`
		194	`.word 0x2203D000 @ R8 - LCD DMA linked list address`
		195	`.word 0x74240000 @ R9 - LCD DMA channel settings`
		196	`.word 0x0005107D @ R10 - CP15r1`
		197	`.word 0x2203C000 @ R11 - First level page table`
		198	`.word 0x00000C1E @ R12 - Default segment flags`
		199	`.word 0x3C500000 @ R0 - SYSCON base`
		200	`.word 0x2007CE65 @ R1 - PWRCON(0)`
		201	`.word 0x0003EFC9 @ R2 - PWRCON(1)`
		202	`.word 0x01002401 @ R3`
		203	`.word 0x00007E90 @ R4`
		204	`.word 0x00404101 @ R5`
		205	`.word 0x38501000 @ R6`
		206	`.word 0x00060400 @ R7`
		207	`.word 0x0000080D @ R8`
		208	`.word 0x0006105D @ R9`
		209	`.word 0x001FB621 @ R10`
		210	`.word 0x0790682B @ R11`
		211	`.word 0x00008040 @ R12`
		212
		213	`.word 0x5322222F @ PCON0`
		214	`.word 0xEEEEEE00 @ PCON1`
		215	`.word 0x2332EEEE @ PCON2`
		216	`.word 0x3333E222 @ PCON3`
		217	`.word 0x33333333 @ PCON4`
		218	`.word 0x33333333 @ PCON5`
		219	`.word 0x3F000E33 @ PCON6`
		220	`.word 0xEEEEEEEE @ PCON7`
		221	`.word 0xEEEEEEEE @ PCON8`
		222	`.word 0xEEEEEEEE @ PCON9`
		223	`.word 0xEEEEEEEE @ PCONA`
		224	`.word 0xEE00EE0E @ PCONB`
		225	`.word 0xEEEE0EEE @ PCONC`
		226	`.word 0xEEEEEEEE @ PCOND`
		227	`.word 0x202222EE @ PCONE`
		228	`.word 0xEEEE0E22 @ PCONF`
		229
		230	`.byte 0x0c, 0 @ PMU init address-data pairs`
		231	`.byte 0x2d, 0x15`
		232	`.byte 0x2e, 1`
		233	`.byte 0x37, 0x15`
		234	`.byte 0x38, 4`
		235	`.byte 0x2f, 0x15`
		236	`.byte 0x30, 1`
		237	`.byte 0x3b, 0`
		238	`.byte 0x3c, 0x8c`
		239	`.byte 0x13, 3`
		240	`.byte 0x14, 0`
		241	`.byte 0x15, 0`
		242	`.byte 0x22, 0x2f`
		243	`.byte 0x23, 1`
		244	`.byte 0x24, 0`
		245	`.byte 0x25, 0x10`
		246	`.byte 0x26, 9`
		247	`.byte 0x27, 1`
		248	`.byte 0x1a, 0x6f`
		249	`.byte 0x1b, 0`
		250	`.byte 0x1c, 0`
		251	`.byte 0x1d, 0x59`
		252	`.byte 0x33, 9`
		253	`.byte 0x34, 1`
		254	`.byte 0x39, 0x18`
		255	`.byte 0x3a, 0`
		256	`.byte 0x18, 0xa`
		257	`.byte 0x19, 4`
		258	`.byte 0x58, 0`
		259	`.byte 0x07, 0xb0`
		260	`.byte 0x08, 3`
		261	`.byte 0x09, 0xfe`
		262	`.byte 0x0a, 0xfc`
		263	`.byte 0x0b, 0xff`
		264	`.byte 0x86, 0xfd`
		265	`.byte 0x0d, 0xdf`
		266	`.byte 0x0e, 0xaa`
		267	`.byte 0x0f, 0x4a`
		268	`.byte 0x10, 5`
		269	`.byte 0x11, 0x27`
		270	`.byte 0x17, 1`
		271	`.byte 0x2a, 5`
		272	`.byte 0xff, 0xff @ PMU init terminator`
		273
		274	`lcddata_ref:`
		275	`.hword lcddata_0 - lcddata_ref`
		276	`.hword lcddata_1 - lcddata_ref - 2`
		277	`.hword lcddata_2 - lcddata_ref - 4`
		278	`.hword lcddata_3 - lcddata_ref - 6`
		279	`lcddata_0:`
		280	`.hword 0x4011`
		281	`.hword 0xc78f`
		282	`.hword 0x8135`
		283	`.byte 0x00`
		284	`.hword 0x813a`
		285	`.byte 0x06`
		286	`.hword 0x8136`
		287	`.byte 0x00`
		288	`.hword 0x4013`
		289	`.hword 0x4029`
		290	`.hword 0xc000`
		291	`lcddata_1:`
		292	`.hword 0x95b0`
		293	`.byte 0x3a`
		294	`.byte 0x3a`
		295	`.byte 0x80`
		296	`.byte 0x80`
		297	`.byte 0x0a`
		298	`.byte 0x0a`
		299	`.byte 0x0a`
		300	`.byte 0x0a`
		301	`.byte 0x0a`
		302	`.byte 0x0a`
		303	`.byte 0x0a`
		304	`.byte 0x0a`
		305	`.byte 0x3c`
		306	`.byte 0x30`
		307	`.byte 0x0f`
		308	`.byte 0x00`
		309	`.byte 0x01`
		310	`.byte 0x54`
		311	`.byte 0x06`
		312	`.byte 0x66`
		313	`.byte 0x66`
		314	`.hword 0x81b8`
		315	`.byte 0xd8`
		316	`.hword 0x9eb1`
		317	`.byte 0x14`
		318	`.byte 0x59`
		319	`.byte 0x00`
		320	`.byte 0x15`
		321	`.byte 0x57`
		322	`.byte 0x27`
		323	`.byte 0x04`
		324	`.byte 0x85`
		325	`.byte 0x14`
		326	`.byte 0x59`
		327	`.byte 0x00`
		328	`.byte 0x15`
		329	`.byte 0x57`
		330	`.byte 0x27`
		331	`.byte 0x04`
		332	`.byte 0x85`
		333	`.byte 0x14`
		334	`.byte 0x09`
		335	`.byte 0x15`
		336	`.byte 0x57`
		337	`.byte 0x27`
		338	`.byte 0x04`
		339	`.byte 0x05`
		340	`.byte 0x14`
		341	`.byte 0x09`
		342	`.byte 0x15`
		343	`.byte 0x57`
		344	`.byte 0x27`
		345	`.byte 0x04`
		346	`.byte 0x05`
		347	`.hword 0x40d2`
		348	`.hword 0x0101`
		349	`.hword 0x8de0`
		350	`.byte 0x00`
		351	`.byte 0x00`
		352	`.byte 0x00`
		353	`.byte 0x05`
		354	`.byte 0x0b`
		355	`.byte 0x12`
		356	`.byte 0x16`
		357	`.byte 0x1f`
		358	`.byte 0x25`
		359	`.byte 0x22`
		360	`.byte 0x24`
		361	`.byte 0x29`
		362	`.byte 0x1c`
		363	`.hword 0x8de1`
		364	`.byte 0x08`
		365	`.byte 0x01`
		366	`.byte 0x01`
		367	`.byte 0x06`
		368	`.byte 0x0b`
		369	`.byte 0x11`
		370	`.byte 0x15`
		371	`.byte 0x1f`
		372	`.byte 0x27`
		373	`.byte 0x26`
		374	`.byte 0x29`
		375	`.byte 0x2f`
		376	`.byte 0x1e`
		377	`.hword 0x8de2`
		378	`.byte 0x07`
		379	`.byte 0x01`
		380	`.byte 0x01`
		381	`.byte 0x05`
		382	`.byte 0x09`
		383	`.byte 0x0f`
		384	`.byte 0x13`
		385	`.byte 0x1e`
		386	`.byte 0x26`
		387	`.byte 0x25`
		388	`.byte 0x28`
		389	`.byte 0x2e`
		390	`.byte 0x1e`
		391	`.hword 0x8de3`
		392	`.byte 0x0d`
		393	`.byte 0x00`
		394	`.byte 0x00`
		395	`.byte 0x00`
		396	`.byte 0x05`
		397	`.byte 0x0b`
		398	`.byte 0x12`
		399	`.byte 0x16`
		400	`.byte 0x1f`
		401	`.byte 0x25`
		402	`.byte 0x22`
		403	`.byte 0x24`
		404	`.byte 0x29`
		405	`.byte 0x1c`
		406	`.hword 0x8de4`
		407	`.byte 0x08`
		408	`.byte 0x01`
		409	`.byte 0x01`
		410	`.byte 0x06`
		411	`.byte 0x0b`
		412	`.byte 0x11`
		413	`.byte 0x15`
		414	`.byte 0x1f`
		415	`.byte 0x27`
		416	`.byte 0x26`
		417	`.byte 0x29`
		418	`.byte 0x2f`
		419	`.byte 0x1e`
		420	`.hword 0x8de5`
		421	`.byte 0x07`
		422	`.byte 0x01`
		423	`.byte 0x01`
		424	`.byte 0x05`
		425	`.byte 0x09`
		426	`.byte 0x0f`
		427	`.byte 0x13`
		428	`.byte 0x1e`
		429	`.byte 0x26`
		430	`.byte 0x25`
		431	`.byte 0x28`
		432	`.byte 0x2e`
		433	`.byte 0x1e`
		434	`.hword 0x813a`
		435	`.byte 0x06`
		436	`.hword 0x81c2`
		437	`.byte 0x00`
		438	`.hword 0x8135`
		439	`.byte 0x00`
		440	`.hword 0x4011`
		441	`.hword 0xce88`
		442	`.hword 0x4013`
		443	`.hword 0x4029`
		444	`lcddata_2:`
		445	`.hword 0xc000`
		446	`lcddata_3:`
		447	`.hword 0x4008`
		448	`.hword 0x0808`
		449	`.hword 0x8110`
		450	`.byte 0x13`
		451	`.hword 0x4011`
		452	`.hword 0x0300`
		453	`.hword 0x4012`
		454	`.hword 0x0101`
		455	`.hword 0x4013`
		456	`.hword 0x0a03`
		457	`.hword 0x4014`
		458	`.hword 0x0a0e`
		459	`.hword 0x4015`
		460	`.hword 0x0a19`
		461	`.hword 0x4016`
		462	`.hword 0x2402`
		463	`.hword 0x8118`
		464	`.byte 0x01`
		465	`.hword 0x8190`
		466	`.byte 0x21`
		467	`.hword 0x4300`
		468	`.hword 0x0506`
		469	`.hword 0x4301`
		470	`.hword 0x0402`
		471	`.hword 0x4302`
		472	`.hword 0x0706`
		473	`.hword 0x4303`
		474	`.hword 0x0303`
		475	`.hword 0x4304`
		476	`.hword 0x0100`
		477	`.hword 0x4305`
		478	`.hword 0x0207`
		479	`.hword 0x4306`
		480	`.hword 0x170e`
		481	`.hword 0x4307`
		482	`.hword 0x0506`
		483	`.hword 0x4308`
		484	`.hword 0x0402`
		485	`.hword 0x4309`
		486	`.hword 0x0706`
		487	`.hword 0x430a`
		488	`.hword 0x0303`
		489	`.hword 0x430b`
		490	`.hword 0x0100`
		491	`.hword 0x430c`
		492	`.hword 0x0207`
		493	`.hword 0x430d`
		494	`.hword 0x170e`
		495	`.hword 0x4310`
		496	`.hword 0x0606`
		497	`.hword 0x4311`
		498	`.hword 0x0506`
		499	`.hword 0x4312`
		500	`.hword 0x0707`
		501	`.hword 0x4313`
		502	`.hword 0x0303`
		503	`.hword 0x4314`
		504	`.hword 0x0200`
		505	`.hword 0x4315`
		506	`.hword 0x0307`
		507	`.hword 0x4316`
		508	`.hword 0x170e`
		509	`.hword 0x4317`
		510	`.hword 0x0606`
		511	`.hword 0x4318`
		512	`.hword 0x0506`
		513	`.hword 0x4319`
		514	`.hword 0x0707`
		515	`.hword 0x431a`
		516	`.hword 0x0303`
		517	`.hword 0x431b`
		518	`.hword 0x0200`
		519	`.hword 0x431c`
		520	`.hword 0x0307`
		521	`.hword 0x431d`
		522	`.hword 0x170e`
		523	`.hword 0x4320`
		524	`.hword 0x0707`
		525	`.hword 0x4321`
		526	`.hword 0x0005`
		527	`.hword 0x4322`
		528	`.hword 0x0705`
		529	`.hword 0x4323`
		530	`.hword 0x0303`
		531	`.hword 0x4324`
		532	`.hword 0x0300`
		533	`.hword 0x4325`
		534	`.hword 0x0707`
		535	`.hword 0x4326`
		536	`.hword 0x1f16`
		537	`.hword 0x4327`
		538	`.hword 0x0707`
		539	`.hword 0x4328`
		540	`.hword 0x0005`
		541	`.hword 0x4329`
		542	`.hword 0x0705`
		543	`.hword 0x432a`
		544	`.hword 0x0303`
		545	`.hword 0x432b`
		546	`.hword 0x0300`
		547	`.hword 0x432c`
		548	`.hword 0x0707`
		549	`.hword 0x432d`
		550	`.hword 0x1f16`
		551	`.hword 0x4400`
		552	`.hword 0x001d`
		553	`.hword 0x4401`
		554	`.hword 0x0001`
		555	`.hword 0x4205`
		556	`.hword 0x0060`
		557	`.hword 0x8107`
		558	`.byte 0x01`
		559	`.hword 0x8131`
		560	`.byte 0x71`
		561	`.hword 0x4110`
		562	`.hword 0x0001`
		563	`.hword 0x4100`
		564	`.hword 0x17b0`
		565	`.hword 0x4101`
		566	`.hword 0x0220`
		567	`.hword 0x4102`
		568	`.hword 0x009b`
		569	`.hword 0x4103`
		570	`.hword 0x1200`
		571	`.hword 0x4105`
		572	`.hword 0x0103`
		573	`.hword 0x4106`
		574	`.hword 0x0105`
		575	`.hword 0x8107`
		576	`.byte 0x21`
		577	`.hword 0x4102`
		578	`.hword 0x00bd`
		579	`.hword 0x4001`
		580	`.hword 0x0110`
		581	`.hword 0x4003`
		582	`.hword 0x0230`
		583	`.hword 0x4002`
		584	`.hword 0x0500`
		585	`.hword 0x8107`
		586	`.byte 0x31`
		587	`.hword 0x4130`
		588	`.byte 0x07`
		589	`.hword 0xc744`
		590	`.hword 0x4030`
		591	`.hword 0x03ff`
		592	`.hword 0xce88`
		593	`.hword 0x8107`
		594	`.byte 0x72`
		595	`.hword 0xe454`
		596	`.hword 0x4007`
		597	`.hword 0x0173`
		598	`.hword 0xc000`
		599
		600	`font:`
		601	`.byte 0, 0, 0, 0, 0`
		602	`.byte 0, 0, 95, 0, 0`
		603	`.byte 0, 7, 0, 7, 0`
		604	`.byte 20, 127, 20, 127, 20`
		605	`.byte 36, 42, 127, 42, 18`
		606	`.byte 35, 19, 8, 100, 98`
		607	`.byte 54, 73, 85, 34, 80`
		608	`.byte 5, 3, 0, 0, 0`
		609	`.byte 28, 34, 65, 0, 0`
		610	`.byte 0, 0, 65, 34, 28`
		611	`.byte 20, 8, 62, 8, 20`
		612	`.byte 8, 8, 62, 8, 8`
		613	`.byte 0, -96, 96, 0, 0`
		614	`.byte 8, 8, 8, 8, 8`
		615	`.byte 0, 96, 96, 0, 0`
		616	`.byte 32, 16, 8, 4, 2`
		617	`.byte 62, 81, 73, 69, 62`
		618	`.byte 0, 66, 127, 64, 0`
		619	`.byte 66, 97, 81, 73, 70`
		620	`.byte 33, 65, 69, 75, 49`
		621	`.byte 24, 20, 18, 127, 16`
		622	`.byte 39, 69, 69, 69, 57`
		623	`.byte 60, 74, 73, 73, 48`
		624	`.byte 1, 113, 9, 5, 3`
		625	`.byte 54, 73, 73, 73, 54`
		626	`.byte 6, 73, 73, 41, 30`
		627	`.byte 0, 54, 54, 0, 0`
		628	`.byte 0, 86, 54, 0, 0`
		629	`.byte 8, 20, 34, 65, 0`
		630	`.byte 20, 20, 20, 20, 20`
		631	`.byte 0, 65, 34, 20, 8`
		632	`.byte 2, 1, 81, 9, 6`
		633	`.byte 50, 73, 121, 65, 62`
		634	`.byte 124, 18, 17, 18, 124`
		635	`.byte 127, 73, 73, 73, 62`
		636	`.byte 62, 65, 65, 65, 34`
		637	`.byte 127, 65, 65, 34, 28`
		638	`.byte 127, 73, 73, 73, 65`
		639	`.byte 127, 9, 9, 9, 1`
		640	`.byte 62, 65, 73, 73, 58`
		641	`.byte 127, 8, 8, 8, 127`
		642	`.byte 0, 65, 127, 65, 0`
		643	`.byte 32, 64, 65, 63, 1`
		644	`.byte 127, 8, 20, 34, 65`
		645	`.byte 127, 64, 64, 64, 64`
		646	`.byte 127, 2, 12, 2, 127`
		647	`.byte 127, 4, 8, 16, 127`
		648	`.byte 62, 65, 65, 65, 62`
		649	`.byte 127, 9, 9, 9, 6`
		650	`.byte 62, 65, 81, 33, 94`
		651	`.byte 127, 9, 25, 41, 70`
		652	`.byte 38, 73, 73, 73, 50`
		653	`.byte 1, 1, 127, 1, 1`
		654	`.byte 63, 64, 64, 64, 63`
		655	`.byte 31, 32, 64, 32, 31`
		656	`.byte 127, 32, 24, 32, 127`
		657	`.byte 99, 20, 8, 20, 99`
		658	`.byte 3, 4, 120, 4, 3`
		659	`.byte 97, 81, 73, 69, 67`
		660	`.byte 0, 127, 65, 65, 0`
		661	`.byte 2, 4, 8, 16, 32`
		662	`.byte 0, 65, 65, 127, 0`
		663	`.byte 4, 2, 1, 2, 4`
		664	`.byte 64, 64, 64, 64, 64`
		665	`.byte 1, 2, 4, 0, 0`
		666	`.byte 32, 84, 84, 84, 120`
		667	`.byte 127, 68, 68, 68, 56`
		668	`.byte 56, 68, 68, 68, 40`
		669	`.byte 56, 68, 68, 68, 127`
		670	`.byte 56, 84, 84, 84, 24`
		671	`.byte 8, 126, 9, 1, 2`
		672	`.byte 8, 84, 84, 84, 60`
		673	`.byte 127, 4, 4, 4, 120`
		674	`.byte 0, 68, 125, 64, 0`
		675	`.byte 32, 64, 64, 61, 0`
		676	`.byte 127, 16, 40, 68, 0`
		677	`.byte 0, 65, 127, 64, 0`
		678	`.byte 124, 4, 24, 4, 120`
		679	`.byte 124, 8, 4, 4, 120`
		680	`.byte 56, 68, 68, 68, 56`
		681	`.byte 124, 20, 20, 20, 24`
		682	`.byte 8, 20, 20, 20, 124`
		683	`.byte 124, 8, 4, 4, 8`
		684	`.byte 72, 84, 84, 84, 32`
		685	`.byte 4, 63, 68, 64, 32`
		686	`.byte 60, 64, 64, 32, 124`
		687	`.byte 28, 32, 64, 32, 28`
		688	`.byte 60, 64, 56, 64, 60`
		689	`.byte 68, 40, 16, 40, 68`
		690	`.byte 12, 80, 80, 80, 60`
		691	`.byte 68, 100, 84, 76, 68`
		692	`.byte 0, 8, 54, 65, 0`
		693	`.byte 0, 0, 119, 0, 0`
		694	`.byte 0, 65, 54, 8, 0`
		695	`.byte 2, 1, 2, 4, 2`
		696
		697	`.code 16`
		698	`.align 1`
		699
		700	`thumb_nrv2e_d8:`
		701	`mov r7,r2`
		702	`mov r4,#1; neg r5,r4 @ r5= -1 initial condition`
		703	`lsl r4,#31 @ 1<<31: refill next time`
		704	`mov r6,#5`
		705	`lsl r6,#8 @ 0x500 @ nrv2e M2_MAX_OFFSET`
		706	`b top_n2e`
		707
		708	`nrv2e_done:`
		709	`blx flushcache`
		710	`bx r7`
		711
		712	`get1_n2e: @ In: Carry set [from adding 0x80000000 (1<<31) to itself]`
		713	`ldrb r4,[r0] @ zero-extend next byte`
		714	`adc r4,r4 @ double and insert CarryIn as low bit`
		715	`add r0,#1`
		716	`lsl r4,#24 @ move to top byte, and set CarryOut from old bit 8`
		717	`mov pc,lr @ return, stay in current (THUMB) mode`
		718
		719	`lit_n2e:`
		720	`ldrb r3,[r0]; add r0,#1`
		721	`strb r3,[r2]; add r2,#1`
		722	`top_n2e:`
		723	`add r4,r4; mov lr,pc; beq get1_n2e; bcs lit_n2e`
		724	`mov r1,#1; b getoff_n2e`
		725
		726	`off_n2e:`
		727	`sub r1,#1`
		728	`add r4,r4; mov lr,pc; beq get1_n2e; adc r1,r1`
		729	`getoff_n2e:`
		730	`add r4,r4; mov lr,pc; beq get1_n2e; adc r1,r1`
		731	`add r4,r4; mov lr,pc; beq get1_n2e; bcc off_n2e`
		732
		733	`sub r3,r1,#3 @ set Carry`
		734	`mov r1,#0 @ Carry unaffected`
		735	`blo offprev_n2e @ r1 was 2; tests Carry only`
		736	`lsl r3,#8`
		737	`ldrb r5,[r0]; add r0,#1 @ low 7+1 r4`
		738	`orr r5,r3`
		739	`mvn r5,r5; beq nrv2e_done @ r5= ~r5`
		740	`asr r5,#1; bcs lenlast_n2e`
		741	`b lenmore_n2e`
		742
		743	`offprev_n2e:`
		744	`add r4,r4; mov lr,pc; beq get1_n2e; bcs lenlast_n2e`
		745	`lenmore_n2e:`
		746	`mov r1,#1`
		747	`add r4,r4; mov lr,pc; beq get1_n2e; bcs lenlast_n2e`
		748	`len_n2e:`
		749	`add r4,r4; mov lr,pc; beq get1_n2e; adc r1,r1`
		750	`add r4,r4; mov lr,pc; beq get1_n2e; bcc len_n2e`
		751	`add r1,#6-2`
		752	`b gotlen_n2e`
		753
		754	`lenlast_n2e:`
		755	`add r4,r4; mov lr,pc; beq get1_n2e; adc r1,r1 @ 0,1,2,3`
		756	`add r1,#2`
		757	`gotlen_n2e: @ 'cmn': add the inputs, set condition codes, discard the sum`
		758	`cmn r6,r5; bcs near_n2e @ within M2_MAX_OFFSET`
		759	`add r1,#1 @ too far away, so minimum match length is 3`
		760	`near_n2e:`
		761	`ldrb r3,[r2] @ force cacheline allocate`
		762	`copy_n2e:`
		763	`ldrb r3,[r2,r5]`
		764	`strb r3,[r2]; add r2,#1`
		765	`sub r1,#1; bne copy_n2e`
		766	`b top_n2e`
		767
		768	`.code 32`
		769	`.align 2`
		770
		771	`foundfile:`
		772	`ldr r12, [r11,#0xc]`
		773	`ldr r11, [r11,#0x8]`
		774	`tst r12, #0x80000000`
		775	`bic r12, r12, #0xff000000`
		776	`bic r12, r12, #0xf00000`
		777	`bne compressed`
		778	`mov r1, #0x08000000`
		779	`bl bootflash_read`
		780	`mov lr, #0x08000000`
		781	`b flushcache`
		782	`compressed:`
		783	`mov r1, #0x09000000`
		784	`bl bootflash_read`
		785	`mov r0, #0x09000000`
		786	`mov r2, #0x08000000`
		787	`blx thumb_nrv2e_d8`
		788
		789
		790	`rendertext:`
		791	`ldrb r3, [r0], #1`
		792	`cmp r3, #0`
		793	`moveq pc, lr`
		794	`adr r6, font`
		795	`sub r3, r3, #0x20`
		796	`cmp r3, #0x5f`
		797	`addcc r6, r3,lsl#2`
		798	`addcc r6, r3`
		799	`mov r3, #5`
		800	`rendertext_col:`
		801	`mov r7, r1`
		802	`ldrb r9, [r6], #1`
		803	`rendertext_row:`
		804	`tst r9, #1`
		805	`strneh r2, [r7]`
		806	`add r7, r7, #640`
		807	`movs r9, r9,lsr#1`
		808	`bne rendertext_row`
		809	`add r1, r1, #2`
		810	`subs r3, r3, #1`
		811	`bne rendertext_col`
		812	`add r1, r1, #2`
		813	`b rendertext`
		814
		815	`spisend:`
		816	`mov r6, #1`
		817	`str r6, [r7,#0x34]`
		818	`spisend_wait:`
		819	`ldr r6, [r7,#0x8]`
		820	`and r6, r6, #0x1f0`
		821	`cmp r6, #0x100`
		822	`beq spisend_wait`
		823	`str r0, [r7,#0x10]`
		824	`spisend_wait2:`
		825	`ldr r6, [r7,#0x8]`
		826	`ands r6, r6, #0x3e00`
		827	`beq spisend_wait2`
		828	`ldr r0, [r7,#0x20]`
		829	`mov pc, lr`
		830
		831	`spirecv:`
		832	`str r0, [r7,#0x34]`
		833	`ldr r6, [r7,#0x4]`
		834	`orr r6, r6, #1`
		835	`str r6, [r7,#0x4]`
		836	`spirecv_loop:`
		837	`ldr r6, [r7,#0x8]`
		838	`ands r6, r6, #0x3e00`
		839	`beq spirecv_loop`
		840	`ldr r6, [r7,#0x20]`
		841	`strb r6, [r1], #1`
		842	`subs r0, r0, #1`
		843	`bne spirecv_loop`
		844	`ldr r6, [r7,#0x4]`
		845	`bic r6, r6, #1`
		846	`str r6, [r7,#0x4]`
		847	`mov pc, lr`
		848
		849	`bootflash_read:`
		850	`mov sp, lr`
		851	`bootflash_wait:`
		852	`ldr r0, [r3,#0x4]`
		853	`bic r0, r0, #1`
		854	`str r0, [r3,#0x4]`
		855	`mov r0, #5`
		856	`bl spisend`
		857	`mov r0, #0xff`
		858	`bl spisend`
		859	`tst r0, #1`
		860	`ldr r0, [r3,#0x4]`
		861	`orr r0, r0, #1`
		862	`str r0, [r3,#0x4]`
		863	`bne bootflash_wait`
		864	`ldr r0, [r3,#0x4]`
		865	`bic r0, r0, #1`
		866	`str r0, [r3,#0x4]`
		867	`mov r0, #3`
		868	`bl spisend`
		869	`mov r0, r11,lsr#16`
		870	`bl spisend`
		871	`mov r0, r11,lsr#8`
		872	`and r0, r0, #0xff`
		873	`bl spisend`
		874	`and r0, r11, #0xff`
		875	`bl spisend`
		876	`mov r0, r12`
		877	`bl spirecv`
		878	`ldr r0, [r3,#0x4]`
		879	`orr r0, r0, #1`
		880	`str r0, [r3,#0x4]`
		881	`mov pc, sp`
		882
		883	`lcdbyteseq:`
		884	`mov r9, r0,lsr#8`
		885	`and r0, r0, #0xff`
		886	`bl sendlcdc`
		887	`lcdbyteseqloop:`
		888	`ldrb r0, [sp], #1`
		889	`bl sendlcdd`
		890	`subs r9, r9, #1`
		891	`bne lcdbyteseqloop`
		892	`b lcdloop`
		893
		894	`sendlcdc:`
		895	`ldr r6, [r4,#0x1c]`
		896	`ands r6, r6, #0x10`
		897	`bne sendlcdc`
		898	`str r0, [r4,#0x04]`
		899	`mov pc, lr`
		900
		901	`sendlcdd:`
		902	`ldr r6, [r4,#0x1c]`
		903	`ands r6, r6, #0x10`
		904	`bne sendlcdd`
		905	`str r0, [r4,#0x40]`
		906	`mov pc, lr`
		907
		908	`i2cwaitrdy:`
		909	`ldr r6, [r5,#0x10]`
		910	`cmp r6, #0`
		911	`bne i2cwaitrdy`
		912	`mov pc, lr`
		913
		914	`i2cwait:`
		915	`ldr r6, [r5]`
		916	`tst r6, #0x10`
		917	`beq i2cwait`
		918	`mov pc, lr`
		919
		920	`pmutransfer:`
		921	`mov r7, lr`
		922	`mov lr, #0xb7`
		923	`str lr, [r5]`
		924	`mov lr, #0xe6`
		925	`str lr, [r5,#0xc]`
		926	`mov lr, #0xf0`
		927	`str lr, [r5,#0x4]`
		928	`bl i2cwait`
		929	`str r3, [r5,#0xc]`
		930	`mov lr, #0xb7`
		931	`str lr, [r5]`
		932	`bl i2cwait`
		933	`cmn r4, #1`
		934	`beq pmuskip`
		935	`str r4, [r5,#0xc]`
		936	`mov lr, #0xb7`
		937	`str lr, [r5]`
		938	`bl i2cwait`
		939	`mov lr, #0xd0`
		940	`b pmudone`
		941	`pmuskip:`
		942	`mov lr, #0xe7`
		943	`str lr, [r5,#0xc]`
		944	`mov lr, #0xb0`
		945	`str lr, [r5,#0x4]`
		946	`mov lr, #0xb7`
		947	`str lr, [r5]`
		948	`bl i2cwait`
		949	`mov lr, #0x37`
		950	`str lr, [r5]`
		951	`bl i2cwait`
		952	`ldr r3, [r5,#0xc]`
		953	`mov lr, #0x90`
		954	`pmudone:`
		955	`str lr, [r5,#0x4]`
		956	`mov lr, #0xb7`
		957	`str lr, [r5]`
		958	`pmuwait:`
		959	`ldr lr, [r5,#0x4]`
		960	`tst lr, #0x20`
		961	`bne pmuwait`
		962	`mov pc, r7`
		963
		964	`udelay:`
		965	`ldr r6, [r1,#0xb4]`
		966	`add r0, r0, r6`
		967	`udelayloop:`
		968	`ldr r6, [r1,#0xb4]`
		969	`cmp r6, r0`
		970	`bmi udelayloop`
		971	`mov pc, lr`
		972
		973
		974	`pwrok:`
		975	`sub r7, r5, #0x04500000 @ R7 = MIUBASE (temporary)`
		976	`cmp r0, #0`
		977	`moveq r6, #0x11`
		978	`streq r6, [r7]`
		979	`str r8, [r7]`
		980	`str r2, [r7,#0xf0]`
		981	`str r9, [r7,#0x8]`
		982	`str r10, [r7,#0x10]`
		983	`mov r8, #0x1800`
		984	`orr r6, r8, #0x45`
		985	`str r6, [r7,#0x200]`
		986	`str r6, [r7,#0x204]`
		987	`str r8, [r7,#0x210]`
		988	`str r8, [r7,#0x214]`
		989	`str r6, [r7,#0x220]`
		990	`str r6, [r7,#0x224]`
		991	`add r6, r6, #0x40`
		992	`str r6, [r7,#0x230]`
		993	`str r6, [r7,#0x234]`
		994	`mov r6, #0x19`
		995	`str r6, [r7,#0x14]`
		996	`str r6, [r7,#0x18]`
		997	`str r11, [r7,#0x1c]`
		998	`ldr r6, [r7,#0x314]`
		999	`bic r6, r6, #0x10`
		1000	`str r6, [r7,#0x314]`
		1001	`add r8, r7, #0x2c`
		1002	`mov r9, #0x24`
		1003	`sdramloop:`
		1004	`ldr r6, [r8]`
		1005	`bic r6, r6, #0x01000000`
		1006	`str r6, [r8], #4`
		1007	`subs r9, r9, #1`
		1008	`bne sdramloop`
		1009	`mov r6, #0x540`
		1010	`str r6, [r7,#0x1cc]`
		1011	`ldr r6, [r7,#0x1d4]`
		1012	`orr r6, r6, #0x80`
		1013	`str r6, [r7,#0x1d4]`
		1014	`mov r6, #0x33`
		1015	`str r6, [r7,#0x4]`
		1016	`str r6, [r7,#0x4]`
		1017	`orr r8, r6, #0x200`
		1018	`str r8, [r7,#0x4]`
		1019	`str r6, [r7,#0x4]`
		1020	`str r6, [r7,#0x4]`
		1021	`str r6, [r7,#0x4]`
		1022	`orr r8, r8, #0x100`
		1023	`str r8, [r7,#0x4]`
		1024	`str r6, [r7,#0x4]`
		1025	`str r6, [r7,#0x4]`
		1026	`str r6, [r7,#0x4]`
		1027	`str r8, [r7,#0x4]`
		1028	`str r6, [r7,#0x4]`
		1029	`str r6, [r7,#0x4]`
		1030	`str r6, [r7,#0x4]`
		1031	`cmp r0, #0`
		1032	`strne r6, [r7,#0xc]`
		1033	`bicne r8, r8, #0x200`
		1034	`strne r8, [r7,#0x4]`
		1035	`strne r6, [r7,#0x4]`
		1036	`strne r6, [r7,#0x4]`
		1037	`strne r6, [r7,#0x4]`
		1038	`strne r12, [r7,#0xc]`
		1039	`strne r8, [r7,#0x4]`
		1040	`strne r6, [r7,#0x4]`
		1041	`strne r6, [r7,#0x4]`
		1042	`strne r6, [r7,#0x4]`
		1043	`ldr r6, [r7,#0x8]`
		1044	`orr r6, r6, #0x61000`
		1045	`str r6, [r7,#0x8]`
		1046	`orr r3, r1, #0x00800000 @ R3 = GPIOBASE`
		1047	`sub r4, r1, #0x04400000 @ R4 = LCDBASE`
		1048	`ldr r0, [r3,#0xc4]`
		1049	`and r8, r0, #0x30 @ R8 = LCD type GPIO bits << 4`
		1050	`add sp, sp, r8,lsr#3`
		1051	`ldrh r0, [sp]`
		1052	`add sp, sp, r0`
		1053	`ldr r0, val_80100db0`
		1054	`str r0, [r4]`
		1055	`mov r0, #0x33`
		1056	`str r0, [r4,#0x20]`
		1057	`lcdloop:`
		1058	`adr lr, lcdloop`
		1059	`ldrb r6, [sp], #1`
		1060	`ldrb r7, [sp], #1`
		1061	`orr r6, r6, r7,lsl#8`
		1062	`mov r7, r6,lsr#14`
		1063	`bics r0, r6, #0xc000`
		1064	`add pc, pc, r7,lsl#2`
		1065	`val_80100db0:`
		1066	`.word 0x80100db0`
		1067	`b sendlcdd`
		1068	`b sendlcdc`
		1069	`bne lcdbyteseq`
		1070	`movne r0, r0,lsl#4`
		1071	`bne udelay`
		1072	`mov r10, #0x22000000`
		1073	`orr r10, r10, #0x10000`
		1074	`add r11, r10, #0x25800`
		1075	`mov r0, #-1`
		1076	`fillbuff:`
		1077	`str r0, [r11,#-4]!`
		1078	`cmp r10, r11`
		1079	`bne fillbuff`
		1080	`mov r1, r11`
		1081	`adr r0, text`
		1082	`bl rendertext`
		1083	`add r1, r11, #0x2800`
		1084	`printerror:`
		1085	`bl rendertext`
		1086	`bl flushcache`
		1087	`cmp r8, #0x30`
		1088	`bne leadisprotocol`
		1089	`mov r9, #0x200`
		1090	`add r0, r9, #0x10`
		1091	`bl sendlcdc`
		1092	`mov r0, #0`
		1093	`bl sendlcdd`
		1094	`add r0, r9, #0x11`
		1095	`bl sendlcdc`
		1096	`sub r0, r9, #0xc1`
		1097	`bl sendlcdd`
		1098	`add r0, r9, #0x12`
		1099	`bl sendlcdc`
		1100	`mov r0, #0`
		1101	`bl sendlcdd`
		1102	`add r0, r9, #0x13`
		1103	`bl sendlcdc`
		1104	`mov r0, #0xef`
		1105	`bl sendlcdd`
		1106	`mov r0, r9`
		1107	`bl sendlcdc`
		1108	`mov r0, #0`
		1109	`bl sendlcdd`
		1110	`add r0, r9, #1`
		1111	`bl sendlcdc`
		1112	`mov r0, #0`
		1113	`bl sendlcdd`
		1114	`add r0, r9, #2`
		1115	`bl sendlcdc`
		1116	`b blit`
		1117	`leadisprotocol:`
		1118	`mov r0, #0x2a`
		1119	`bl sendlcdc`
		1120	`mov r0, #0`
		1121	`bl sendlcdd`
		1122	`mov r0, #0`
		1123	`bl sendlcdd`
		1124	`mov r0, #1`
		1125	`bl sendlcdd`
		1126	`mov r0, #0x3f`
		1127	`bl sendlcdd`
		1128	`mov r0, #0x2b`
		1129	`bl sendlcdc`
		1130	`mov r0, #0`
		1131	`bl sendlcdd`
		1132	`mov r0, #0`
		1133	`bl sendlcdd`
		1134	`mov r0, #0`
		1135	`bl sendlcdd`
		1136	`mov r0, #0xef`
		1137	`bl sendlcdd`
		1138	`mov r0, #0x2c`
		1139	`bl sendlcdc`
		1140	`blit:`
		1141	`sub r7, r4, #0x00100000 @ R7 = DMA0BASE (temporary)`
		1142	`mov r0, #1`
		1143	`str r0, [r7,#0x30]`
		1144	`mov r0, #0x22000000`
		1145	`orr r0, r0, #0x3d000`
		1146	`add r1, r7, #0x100`
		1147	`mov r13, #0x8800`
		1148	`orr r13, r13, #0xc1`
		1149	`ldmia r0, {r9-r12}`
		1150	`stmia r1, {r9-r13}`
		1151	`tst r5, #0xff`
		1152	`failed:`
		1153	`bne failed`
		1154	`mov r3, #0x2b`
		1155	`mov r4, #4`
		1156	`bl pmutransfer`
		1157	`mov r3, #0x28`
		1158	`mov r4, #14`
		1159	`bl pmutransfer`
		1160	`mov r3, #0x29`
		1161	`mov r4, #1`
		1162	`bl pmutransfer`
		1163	`sub r7, r5, #0x00300000 @ R7 = SPIBASE`
		1164	`orr r3, r5, #0x00900000 @ R3 = GPIOBASE`
		1165	`mov r0, #0xf`
		1166	`str r0, [r7,#0x8]`
		1167	`ldr r0, [r7]`
		1168	`orr r0, r0, #0xc`
		1169	`str r0, [r7]`
		1170	`mov r0, #4`
		1171	`str r0, [r7,#0x30]`
		1172	`mov r0, #6`
		1173	`str r0, [r7,#0xc]`
		1174	`ldr r0, val_00010618`
		1175	`str r0, [r7,#0x4]`
		1176	`ldr r0, [r7]`
		1177	`orr r0, r0, #0xc`
		1178	`str r0, [r7]`
		1179	`mov r0, #1`
		1180	`str r0, [r7]`
		1181	`sub r1, r9, #0x1000`
		1182	`mov r11, #0`
		1183	`mov r12, #0x1000`
		1184	`bl bootflash_read`
		1185	`sub r11, r9, #0x1000`
		1186	`ldrd r4, bootfilename`
		1187	`searchfile:`
		1188	`ldrd r12, [r11]`
		1189	`cmp r4, r12`
		1190	`cmpeq r5, r13`
		1191	`beq foundfile`
		1192	`add r11, r11, #0x10`
		1193	`tst r11, #0x10000`
		1194	`beq searchfile`
		1195	`adr r0, errormessage`
		1196	`sub r4, r3, #0x04c00000 @ R4 = LCDBASE`
		1197	`mov r1, #0x22000000`
		1198	`orr r1, r1, #0x13c00`
		1199	`b printerror`
		1200
		1201	`val_00010618:`
		1202	`.word 0x00010618`
		1203
		1204	`bootfilename:`
		1205	`.ascii "embios "`
		1206
		1207	`text:`
		1208	`.ascii "emBIOS Loader v"`
		1209	`.ascii VERSION`
		1210	`.ascii " r"`
		1211	`.ascii VERSION_SVN`
		1212	`.ascii "\0"`
		1213	`.ascii "Loading emBIOS...\0"`
		1214
		1215	`errormessage:`
		1216	`.ascii "File not found!\0"`

Subversion Repositories freemyipod

(root)/embios/trunk/loader/ipodclassic/main.S @ 273 – Rev