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git01.mediatek.com / filogic / uboot / e56f2c57389fb5409dccdb1307d9096df441d919 / . / cpu / mpc85xx / start.S
blob: 89eea8cbe80673747dd7d49cd2fb85556291a206 [file] [log] [blame]
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]1/*
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]2 * Copyright 2004, 2007 Freescale Semiconductor.
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]3 * Copyright (C) 2003 Motorola,Inc.
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24/* U-Boot Startup Code for Motorola 85xx PowerPC based Embedded Boards
25 *
26 * The processor starts at 0xfffffffc and the code is first executed in the
27 * last 4K page(0xfffff000-0xffffffff) in flash/rom.
28 *
29 */
30
31#include <config.h>
32#include <mpc85xx.h>
Peter Tyser62948502008-11-03 09:30:59 -0600[diff] [blame]33#include <timestamp.h>
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]34#include <version.h>
35
36#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
37
38#include <ppc_asm.tmpl>
39#include <ppc_defs.h>
40
41#include <asm/cache.h>
42#include <asm/mmu.h>
43
44#ifndef CONFIG_IDENT_STRING
45#define CONFIG_IDENT_STRING ""
46#endif
47
48#undef MSR_KERNEL
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]49#define MSR_KERNEL ( MSR_ME ) /* Machine Check */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]50
51/*
52 * Set up GOT: Global Offset Table
53 *
54 * Use r14 to access the GOT
55 */
56 START_GOT
57 GOT_ENTRY(_GOT2_TABLE_)
58 GOT_ENTRY(_FIXUP_TABLE_)
59
60 GOT_ENTRY(_start)
61 GOT_ENTRY(_start_of_vectors)
62 GOT_ENTRY(_end_of_vectors)
63 GOT_ENTRY(transfer_to_handler)
64
65 GOT_ENTRY(__init_end)
66 GOT_ENTRY(_end)
67 GOT_ENTRY(__bss_start)
68 END_GOT
69
70/*
71 * e500 Startup -- after reset only the last 4KB of the effective
72 * address space is mapped in the MMU L2 TLB1 Entry0. The .bootpg
73 * section is located at THIS LAST page and basically does three
74 * things: clear some registers, set up exception tables and
75 * add more TLB entries for 'larger spaces'(e.g. the boot rom) to
76 * continue the boot procedure.
77
78 * Once the boot rom is mapped by TLB entries we can proceed
79 * with normal startup.
80 *
81 */
82
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]83 .section .bootpg,"ax"
84 .globl _start_e500
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]85
86_start_e500:
wdenka445ddf2004-06-09 00:34:46 +0000[diff] [blame]87
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]88/* clear registers/arrays not reset by hardware */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]89
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]90 /* L1 */
91 li r0,2
92 mtspr L1CSR0,r0 /* invalidate d-cache */
Wolfgang Denka1be4762008-05-20 16:00:29 +0200[diff] [blame]93 mtspr L1CSR1,r0 /* invalidate i-cache */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]94
95 mfspr r1,DBSR
96 mtspr DBSR,r1 /* Clear all valid bits */
97
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]98 /*
99 * Enable L1 Caches early
100 *
101 */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]102
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]103 lis r2,L1CSR0_CPE@H /* enable parity */
104 ori r2,r2,L1CSR0_DCE
105 mtspr L1CSR0,r2 /* enable L1 Dcache */
106 isync
107 mtspr L1CSR1,r2 /* enable L1 Icache */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]108 isync
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]109 msync
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]110
111 /* Setup interrupt vectors */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]112 lis r1,TEXT_BASE@h
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]113 mtspr IVPR,r1
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]114
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]115 li r1,0x0100
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]116 mtspr IVOR0,r1 /* 0: Critical input */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]117 li r1,0x0200
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]118 mtspr IVOR1,r1 /* 1: Machine check */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]119 li r1,0x0300
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]120 mtspr IVOR2,r1 /* 2: Data storage */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]121 li r1,0x0400
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]122 mtspr IVOR3,r1 /* 3: Instruction storage */
123 li r1,0x0500
124 mtspr IVOR4,r1 /* 4: External interrupt */
125 li r1,0x0600
126 mtspr IVOR5,r1 /* 5: Alignment */
127 li r1,0x0700
128 mtspr IVOR6,r1 /* 6: Program check */
129 li r1,0x0800
130 mtspr IVOR7,r1 /* 7: floating point unavailable */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]131 li r1,0x0900
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]132 mtspr IVOR8,r1 /* 8: System call */
133 /* 9: Auxiliary processor unavailable(unsupported) */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]134 li r1,0x0a00
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]135 mtspr IVOR10,r1 /* 10: Decrementer */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]136 li r1,0x0b00
137 mtspr IVOR11,r1 /* 11: Interval timer */
138 li r1,0x0c00
Wolfgang Denkc94dea22005-08-04 01:24:19 +0200[diff] [blame]139 mtspr IVOR12,r1 /* 12: Watchdog timer */
140 li r1,0x0d00
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]141 mtspr IVOR13,r1 /* 13: Data TLB error */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]142 li r1,0x0e00
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]143 mtspr IVOR14,r1 /* 14: Instruction TLB error */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]144 li r1,0x0f00
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]145 mtspr IVOR15,r1 /* 15: Debug */
146
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]147 /* Clear and set up some registers. */
Kumar Gala9772ee72008-01-16 22:38:34 -0600[diff] [blame]148 li r0,0x0000
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]149 lis r1,0xffff
150 mtspr DEC,r0 /* prevent dec exceptions */
151 mttbl r0 /* prevent fit & wdt exceptions */
152 mttbu r0
153 mtspr TSR,r1 /* clear all timer exception status */
154 mtspr TCR,r0 /* disable all */
155 mtspr ESR,r0 /* clear exception syndrome register */
156 mtspr MCSR,r0 /* machine check syndrome register */
157 mtxer r0 /* clear integer exception register */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]158
159 /* Enable Time Base and Select Time Base Clock */
wdenk13eb2212004-07-09 23:27:13 +0000[diff] [blame]160 lis r0,HID0_EMCP@h /* Enable machine check */
Jon Loeliger77a4f6e2005-07-25 14:05:07 -0500[diff] [blame]161#if defined(CONFIG_ENABLE_36BIT_PHYS)
Kumar Gala9772ee72008-01-16 22:38:34 -0600[diff] [blame]162 ori r0,r0,HID0_ENMAS7@l /* Enable MAS7 */
Jon Loeliger77a4f6e2005-07-25 14:05:07 -0500[diff] [blame]163#endif
Kumar Galae56f2c52009-03-19 09:16:10 -0500[diff] [blame^]164#ifndef CONFIG_E500MC
Kumar Gala9772ee72008-01-16 22:38:34 -0600[diff] [blame]165 ori r0,r0,HID0_TBEN@l /* Enable Timebase */
Kumar Galae56f2c52009-03-19 09:16:10 -0500[diff] [blame^]166#endif
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]167 mtspr HID0,r0
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]168
Kumar Gala9f4a6892008-10-23 01:47:38 -0500[diff] [blame]169#ifndef CONFIG_E500MC
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]170 li r0,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]171 mtspr HID1,r0
Kumar Gala9f4a6892008-10-23 01:47:38 -0500[diff] [blame]172#endif
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]173
174 /* Enable Branch Prediction */
175#if defined(CONFIG_BTB)
176 li r0,0x201 /* BBFI = 1, BPEN = 1 */
177 mtspr BUCSR,r0
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]178#endif
179
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]180#if defined(CONFIG_SYS_INIT_DBCR)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]181 lis r1,0xffff
182 ori r1,r1,0xffff
wdenk13eb2212004-07-09 23:27:13 +0000[diff] [blame]183 mtspr DBSR,r1 /* Clear all status bits */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]184 lis r0,CONFIG_SYS_INIT_DBCR@h /* DBCR0[IDM] must be set */
185 ori r0,r0,CONFIG_SYS_INIT_DBCR@l
wdenk13eb2212004-07-09 23:27:13 +0000[diff] [blame]186 mtspr DBCR0,r0
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]187#endif
188
Dave Liu68aec142008-12-16 12:09:27 +0800[diff] [blame]189 /* create a temp mapping in AS=1 to the 4M boot window */
Kumar Gala9772ee72008-01-16 22:38:34 -0600[diff] [blame]190 lis r6,FSL_BOOKE_MAS0(1, 15, 0)@h
191 ori r6,r6,FSL_BOOKE_MAS0(1, 15, 0)@l
192
Dave Liu68aec142008-12-16 12:09:27 +0800[diff] [blame]193 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@h
194 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@l
Kumar Gala9772ee72008-01-16 22:38:34 -0600[diff] [blame]195
Dave Liu68aec142008-12-16 12:09:27 +0800[diff] [blame]196 lis r8,FSL_BOOKE_MAS2(TEXT_BASE & 0xffc00000, (MAS2_I|MAS2_G))@h
197 ori r8,r8,FSL_BOOKE_MAS2(TEXT_BASE & 0xffc00000, (MAS2_I|MAS2_G))@l
Kumar Gala9772ee72008-01-16 22:38:34 -0600[diff] [blame]198
Dave Liu68aec142008-12-16 12:09:27 +0800[diff] [blame]199 /* The 85xx has the default boot window 0xff800000 - 0xffffffff */
200 lis r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
201 ori r9,r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
Kumar Gala9772ee72008-01-16 22:38:34 -0600[diff] [blame]202
203 mtspr MAS0,r6
204 mtspr MAS1,r7
205 mtspr MAS2,r8
206 mtspr MAS3,r9
207 isync
208 msync
209 tlbwe
210
211 /* create a temp mapping in AS=1 to the stack */
212 lis r6,FSL_BOOKE_MAS0(1, 14, 0)@h
213 ori r6,r6,FSL_BOOKE_MAS0(1, 14, 0)@l
214
215 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@h
216 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@l
217
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]218 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@h
219 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@l
Kumar Gala9772ee72008-01-16 22:38:34 -0600[diff] [blame]220
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]221 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
222 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
Kumar Gala9772ee72008-01-16 22:38:34 -0600[diff] [blame]223
224 mtspr MAS0,r6
225 mtspr MAS1,r7
226 mtspr MAS2,r8
227 mtspr MAS3,r9
228 isync
229 msync
230 tlbwe
231
232 lis r6,MSR_CE|MSR_ME|MSR_DE|MSR_IS|MSR_DS@h
233 ori r6,r6,MSR_CE|MSR_ME|MSR_DE|MSR_IS|MSR_DS@l
234 lis r7,switch_as@h
235 ori r7,r7,switch_as@l
236
237 mtspr SPRN_SRR0,r7
238 mtspr SPRN_SRR1,r6
239 rfi
240
241switch_as:
Kumar Gala76e276b2007-08-07 18:07:27 -0500[diff] [blame]242/* L1 DCache is used for initial RAM */
243
244 /* Allocate Initial RAM in data cache.
245 */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]246 lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
247 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
Kumar Gala938e14e2008-01-08 01:22:21 -0600[diff] [blame]248 mfspr r2, L1CFG0
249 andi. r2, r2, 0x1ff
250 /* cache size * 1024 / (2 * L1 line size) */
251 slwi r2, r2, (10 - 1 - L1_CACHE_SHIFT)
Kumar Gala76e276b2007-08-07 18:07:27 -0500[diff] [blame]252 mtctr r2
253 li r0,0
2541:
255 dcbz r0,r3
256 dcbtls 0,r0,r3
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]257 addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
Kumar Gala76e276b2007-08-07 18:07:27 -0500[diff] [blame]258 bdnz 1b
259
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]260 /* Jump out the last 4K page and continue to 'normal' start */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]261#ifdef CONFIG_SYS_RAMBOOT
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]262 b _start_cont
Kumar Gala76e276b2007-08-07 18:07:27 -0500[diff] [blame]263#else
264 /* Calculate absolute address in FLASH and jump there */
265 /*--------------------------------------------------------------*/
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]266 lis r3,CONFIG_SYS_MONITOR_BASE@h
267 ori r3,r3,CONFIG_SYS_MONITOR_BASE@l
Kumar Gala76e276b2007-08-07 18:07:27 -0500[diff] [blame]268 addi r3,r3,_start_cont - _start + _START_OFFSET
269 mtlr r3
urwithsughosh@gmail.come9f4e342007-09-24 13:36:01 -0400[diff] [blame]270 blr
Kumar Gala76e276b2007-08-07 18:07:27 -0500[diff] [blame]271#endif
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]272
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]273 .text
274 .globl _start
275_start:
276 .long 0x27051956 /* U-BOOT Magic Number */
277 .globl version_string
278version_string:
279 .ascii U_BOOT_VERSION
Peter Tyser62948502008-11-03 09:30:59 -0600[diff] [blame]280 .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]281 .ascii CONFIG_IDENT_STRING, "\0"
282
283 .align 4
284 .globl _start_cont
285_start_cont:
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]286 /* Setup the stack in initial RAM,could be L2-as-SRAM or L1 dcache*/
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]287 lis r1,CONFIG_SYS_INIT_RAM_ADDR@h
288 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]289
290 li r0,0
291 stwu r0,-4(r1)
292 stwu r0,-4(r1) /* Terminate call chain */
293
294 stwu r1,-8(r1) /* Save back chain and move SP */
295 lis r0,RESET_VECTOR@h /* Address of reset vector */
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]296 ori r0,r0,RESET_VECTOR@l
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]297 stwu r1,-8(r1) /* Save back chain and move SP */
298 stw r0,+12(r1) /* Save return addr (underflow vect) */
299
300 GET_GOT
Kumar Gala9772ee72008-01-16 22:38:34 -0600[diff] [blame]301 bl cpu_init_early_f
302
303 /* switch back to AS = 0 */
304 lis r3,(MSR_CE|MSR_ME|MSR_DE)@h
305 ori r3,r3,(MSR_CE|MSR_ME|MSR_DE)@l
306 mtmsr r3
307 isync
308
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]309 bl cpu_init_f
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]310 bl board_init_f
wdenk13eb2212004-07-09 23:27:13 +0000[diff] [blame]311 isync
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]312
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]313 . = EXC_OFF_SYS_RESET
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]314 .globl _start_of_vectors
315_start_of_vectors:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]316
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]317/* Critical input. */
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]318 CRIT_EXCEPTION(0x0100, CriticalInput, CritcalInputException)
319
320/* Machine check */
321 MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]322
323/* Data Storage exception. */
324 STD_EXCEPTION(0x0300, DataStorage, UnknownException)
325
326/* Instruction Storage exception. */
327 STD_EXCEPTION(0x0400, InstStorage, UnknownException)
328
329/* External Interrupt exception. */
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]330 STD_EXCEPTION(0x0500, ExtInterrupt, ExtIntException)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]331
332/* Alignment exception. */
333 . = 0x0600
334Alignment:
Rafal Jaworowski06244e42007-06-22 14:58:04 +0200[diff] [blame]335 EXCEPTION_PROLOG(SRR0, SRR1)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]336 mfspr r4,DAR
337 stw r4,_DAR(r21)
338 mfspr r5,DSISR
339 stw r5,_DSISR(r21)
340 addi r3,r1,STACK_FRAME_OVERHEAD
341 li r20,MSR_KERNEL
342 rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */
343 lwz r6,GOT(transfer_to_handler)
344 mtlr r6
345 blrl
346.L_Alignment:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]347 .long AlignmentException - _start + _START_OFFSET
348 .long int_return - _start + _START_OFFSET
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]349
350/* Program check exception */
351 . = 0x0700
352ProgramCheck:
Rafal Jaworowski06244e42007-06-22 14:58:04 +0200[diff] [blame]353 EXCEPTION_PROLOG(SRR0, SRR1)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]354 addi r3,r1,STACK_FRAME_OVERHEAD
355 li r20,MSR_KERNEL
356 rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */
357 lwz r6,GOT(transfer_to_handler)
358 mtlr r6
359 blrl
360.L_ProgramCheck:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]361 .long ProgramCheckException - _start + _START_OFFSET
362 .long int_return - _start + _START_OFFSET
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]363
364 /* No FPU on MPC85xx. This exception is not supposed to happen.
365 */
366 STD_EXCEPTION(0x0800, FPUnavailable, UnknownException)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]367
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]368 . = 0x0900
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]369/*
370 * r0 - SYSCALL number
371 * r3-... arguments
372 */
373SystemCall:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]374 addis r11,r0,0 /* get functions table addr */
375 ori r11,r11,0 /* Note: this code is patched in trap_init */
376 addis r12,r0,0 /* get number of functions */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]377 ori r12,r12,0
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]378
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]379 cmplw 0,r0,r12
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]380 bge 1f
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]381
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]382 rlwinm r0,r0,2,0,31 /* fn_addr = fn_tbl[r0] */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]383 add r11,r11,r0
384 lwz r11,0(r11)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]385
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]386 li r20,0xd00-4 /* Get stack pointer */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]387 lwz r12,0(r20)
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]388 subi r12,r12,12 /* Adjust stack pointer */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]389 li r0,0xc00+_end_back-SystemCall
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]390 cmplw 0,r0,r12 /* Check stack overflow */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]391 bgt 1f
392 stw r12,0(r20)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]393
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]394 mflr r0
395 stw r0,0(r12)
396 mfspr r0,SRR0
397 stw r0,4(r12)
398 mfspr r0,SRR1
399 stw r0,8(r12)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]400
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]401 li r12,0xc00+_back-SystemCall
402 mtlr r12
403 mtspr SRR0,r11
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]404
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]4051: SYNC
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]406 rfi
407_back:
408
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]409 mfmsr r11 /* Disable interrupts */
410 li r12,0
411 ori r12,r12,MSR_EE
412 andc r11,r11,r12
413 SYNC /* Some chip revs need this... */
414 mtmsr r11
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]415 SYNC
416
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]417 li r12,0xd00-4 /* restore regs */
418 lwz r12,0(r12)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]419
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]420 lwz r11,0(r12)
421 mtlr r11
422 lwz r11,4(r12)
423 mtspr SRR0,r11
424 lwz r11,8(r12)
425 mtspr SRR1,r11
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]426
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]427 addi r12,r12,12 /* Adjust stack pointer */
428 li r20,0xd00-4
429 stw r12,0(r20)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]430
431 SYNC
432 rfi
433_end_back:
434
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]435 STD_EXCEPTION(0x0a00, Decrementer, timer_interrupt)
436 STD_EXCEPTION(0x0b00, IntervalTimer, UnknownException)
437 STD_EXCEPTION(0x0c00, WatchdogTimer, UnknownException)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]438
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]439 STD_EXCEPTION(0x0d00, DataTLBError, UnknownException)
440 STD_EXCEPTION(0x0e00, InstructionTLBError, UnknownException)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]441
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]442 CRIT_EXCEPTION(0x0f00, DebugBreakpoint, DebugException )
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]443
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]444 .globl _end_of_vectors
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]445_end_of_vectors:
446
447
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]448 . = . + (0x100 - ( . & 0xff )) /* align for debug */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]449
450/*
451 * This code finishes saving the registers to the exception frame
452 * and jumps to the appropriate handler for the exception.
453 * Register r21 is pointer into trap frame, r1 has new stack pointer.
454 */
455 .globl transfer_to_handler
456transfer_to_handler:
457 stw r22,_NIP(r21)
458 lis r22,MSR_POW@h
459 andc r23,r23,r22
460 stw r23,_MSR(r21)
461 SAVE_GPR(7, r21)
462 SAVE_4GPRS(8, r21)
463 SAVE_8GPRS(12, r21)
464 SAVE_8GPRS(24, r21)
465
466 mflr r23
467 andi. r24,r23,0x3f00 /* get vector offset */
468 stw r24,TRAP(r21)
469 li r22,0
470 stw r22,RESULT(r21)
471 mtspr SPRG2,r22 /* r1 is now kernel sp */
472
473 lwz r24,0(r23) /* virtual address of handler */
474 lwz r23,4(r23) /* where to go when done */
475 mtspr SRR0,r24
476 mtspr SRR1,r20
477 mtlr r23
478 SYNC
479 rfi /* jump to handler, enable MMU */
480
481int_return:
482 mfmsr r28 /* Disable interrupts */
483 li r4,0
484 ori r4,r4,MSR_EE
485 andc r28,r28,r4
486 SYNC /* Some chip revs need this... */
487 mtmsr r28
488 SYNC
489 lwz r2,_CTR(r1)
490 lwz r0,_LINK(r1)
491 mtctr r2
492 mtlr r0
493 lwz r2,_XER(r1)
494 lwz r0,_CCR(r1)
495 mtspr XER,r2
496 mtcrf 0xFF,r0
497 REST_10GPRS(3, r1)
498 REST_10GPRS(13, r1)
499 REST_8GPRS(23, r1)
500 REST_GPR(31, r1)
501 lwz r2,_NIP(r1) /* Restore environment */
502 lwz r0,_MSR(r1)
503 mtspr SRR0,r2
504 mtspr SRR1,r0
505 lwz r0,GPR0(r1)
506 lwz r2,GPR2(r1)
507 lwz r1,GPR1(r1)
508 SYNC
509 rfi
510
511crit_return:
512 mfmsr r28 /* Disable interrupts */
513 li r4,0
514 ori r4,r4,MSR_EE
515 andc r28,r28,r4
516 SYNC /* Some chip revs need this... */
517 mtmsr r28
518 SYNC
519 lwz r2,_CTR(r1)
520 lwz r0,_LINK(r1)
521 mtctr r2
522 mtlr r0
523 lwz r2,_XER(r1)
524 lwz r0,_CCR(r1)
525 mtspr XER,r2
526 mtcrf 0xFF,r0
527 REST_10GPRS(3, r1)
528 REST_10GPRS(13, r1)
529 REST_8GPRS(23, r1)
530 REST_GPR(31, r1)
531 lwz r2,_NIP(r1) /* Restore environment */
532 lwz r0,_MSR(r1)
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]533 mtspr SPRN_CSRR0,r2
534 mtspr SPRN_CSRR1,r0
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]535 lwz r0,GPR0(r1)
536 lwz r2,GPR2(r1)
537 lwz r1,GPR1(r1)
538 SYNC
539 rfci
540
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]541mck_return:
542 mfmsr r28 /* Disable interrupts */
543 li r4,0
544 ori r4,r4,MSR_EE
545 andc r28,r28,r4
546 SYNC /* Some chip revs need this... */
547 mtmsr r28
548 SYNC
549 lwz r2,_CTR(r1)
550 lwz r0,_LINK(r1)
551 mtctr r2
552 mtlr r0
553 lwz r2,_XER(r1)
554 lwz r0,_CCR(r1)
555 mtspr XER,r2
556 mtcrf 0xFF,r0
557 REST_10GPRS(3, r1)
558 REST_10GPRS(13, r1)
559 REST_8GPRS(23, r1)
560 REST_GPR(31, r1)
561 lwz r2,_NIP(r1) /* Restore environment */
562 lwz r0,_MSR(r1)
563 mtspr SPRN_MCSRR0,r2
564 mtspr SPRN_MCSRR1,r0
565 lwz r0,GPR0(r1)
566 lwz r2,GPR2(r1)
567 lwz r1,GPR1(r1)
568 SYNC
569 rfmci
570
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]571/* Cache functions.
572*/
Kumar Gala32090b32008-09-22 14:11:10 -0500[diff] [blame]573.globl invalidate_icache
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]574invalidate_icache:
575 mfspr r0,L1CSR1
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]576 ori r0,r0,L1CSR1_ICFI
577 msync
578 isync
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]579 mtspr L1CSR1,r0
580 isync
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]581 blr /* entire I cache */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]582
Kumar Gala32090b32008-09-22 14:11:10 -0500[diff] [blame]583.globl invalidate_dcache
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]584invalidate_dcache:
585 mfspr r0,L1CSR0
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]586 ori r0,r0,L1CSR0_DCFI
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]587 msync
588 isync
589 mtspr L1CSR0,r0
590 isync
591 blr
592
593 .globl icache_enable
594icache_enable:
595 mflr r8
596 bl invalidate_icache
597 mtlr r8
598 isync
599 mfspr r4,L1CSR1
600 ori r4,r4,0x0001
601 oris r4,r4,0x0001
602 mtspr L1CSR1,r4
603 isync
604 blr
605
606 .globl icache_disable
607icache_disable:
608 mfspr r0,L1CSR1
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]609 lis r3,0
610 ori r3,r3,L1CSR1_ICE
611 andc r0,r0,r3
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]612 mtspr L1CSR1,r0
613 isync
614 blr
615
616 .globl icache_status
617icache_status:
618 mfspr r3,L1CSR1
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]619 andi. r3,r3,L1CSR1_ICE
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]620 blr
621
622 .globl dcache_enable
623dcache_enable:
624 mflr r8
625 bl invalidate_dcache
626 mtlr r8
627 isync
628 mfspr r0,L1CSR0
629 ori r0,r0,0x0001
630 oris r0,r0,0x0001
631 msync
632 isync
633 mtspr L1CSR0,r0
634 isync
635 blr
636
637 .globl dcache_disable
638dcache_disable:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]639 mfspr r3,L1CSR0
640 lis r4,0
641 ori r4,r4,L1CSR0_DCE
642 andc r3,r3,r4
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]643 mtspr L1CSR0,r0
644 isync
645 blr
646
647 .globl dcache_status
648dcache_status:
649 mfspr r3,L1CSR0
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]650 andi. r3,r3,L1CSR0_DCE
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]651 blr
652
653 .globl get_pir
654get_pir:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]655 mfspr r3,PIR
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]656 blr
657
658 .globl get_pvr
659get_pvr:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]660 mfspr r3,PVR
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]661 blr
662
wdenka445ddf2004-06-09 00:34:46 +0000[diff] [blame]663 .globl get_svr
664get_svr:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]665 mfspr r3,SVR
wdenka445ddf2004-06-09 00:34:46 +0000[diff] [blame]666 blr
667
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]668 .globl wr_tcr
669wr_tcr:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]670 mtspr TCR,r3
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]671 blr
672
673/*------------------------------------------------------------------------------- */
674/* Function: in8 */
675/* Description: Input 8 bits */
676/*------------------------------------------------------------------------------- */
677 .globl in8
678in8:
679 lbz r3,0x0000(r3)
680 blr
681
682/*------------------------------------------------------------------------------- */
683/* Function: out8 */
684/* Description: Output 8 bits */
685/*------------------------------------------------------------------------------- */
686 .globl out8
687out8:
688 stb r4,0x0000(r3)
Ed Swarthout7d6be302007-09-26 16:35:54 -0500[diff] [blame]689 sync
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]690 blr
691
692/*------------------------------------------------------------------------------- */
693/* Function: out16 */
694/* Description: Output 16 bits */
695/*------------------------------------------------------------------------------- */
696 .globl out16
697out16:
698 sth r4,0x0000(r3)
Ed Swarthout7d6be302007-09-26 16:35:54 -0500[diff] [blame]699 sync
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]700 blr
701
702/*------------------------------------------------------------------------------- */
703/* Function: out16r */
704/* Description: Byte reverse and output 16 bits */
705/*------------------------------------------------------------------------------- */
706 .globl out16r
707out16r:
708 sthbrx r4,r0,r3
Ed Swarthout7d6be302007-09-26 16:35:54 -0500[diff] [blame]709 sync
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]710 blr
711
712/*------------------------------------------------------------------------------- */
713/* Function: out32 */
714/* Description: Output 32 bits */
715/*------------------------------------------------------------------------------- */
716 .globl out32
717out32:
718 stw r4,0x0000(r3)
Ed Swarthout7d6be302007-09-26 16:35:54 -0500[diff] [blame]719 sync
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]720 blr
721
722/*------------------------------------------------------------------------------- */
723/* Function: out32r */
724/* Description: Byte reverse and output 32 bits */
725/*------------------------------------------------------------------------------- */
726 .globl out32r
727out32r:
728 stwbrx r4,r0,r3
Ed Swarthout7d6be302007-09-26 16:35:54 -0500[diff] [blame]729 sync
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]730 blr
731
732/*------------------------------------------------------------------------------- */
733/* Function: in16 */
734/* Description: Input 16 bits */
735/*------------------------------------------------------------------------------- */
736 .globl in16
737in16:
738 lhz r3,0x0000(r3)
739 blr
740
741/*------------------------------------------------------------------------------- */
742/* Function: in16r */
743/* Description: Input 16 bits and byte reverse */
744/*------------------------------------------------------------------------------- */
745 .globl in16r
746in16r:
747 lhbrx r3,r0,r3
748 blr
749
750/*------------------------------------------------------------------------------- */
751/* Function: in32 */
752/* Description: Input 32 bits */
753/*------------------------------------------------------------------------------- */
754 .globl in32
755in32:
756 lwz 3,0x0000(3)
757 blr
758
759/*------------------------------------------------------------------------------- */
760/* Function: in32r */
761/* Description: Input 32 bits and byte reverse */
762/*------------------------------------------------------------------------------- */
763 .globl in32r
764in32r:
765 lwbrx r3,r0,r3
766 blr
767
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]768/*------------------------------------------------------------------------------*/
769
770/*
771 * void relocate_code (addr_sp, gd, addr_moni)
772 *
773 * This "function" does not return, instead it continues in RAM
774 * after relocating the monitor code.
775 *
776 * r3 = dest
777 * r4 = src
778 * r5 = length in bytes
779 * r6 = cachelinesize
780 */
781 .globl relocate_code
782relocate_code:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]783 mr r1,r3 /* Set new stack pointer */
784 mr r9,r4 /* Save copy of Init Data pointer */
785 mr r10,r5 /* Save copy of Destination Address */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]786
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]787 mr r3,r5 /* Destination Address */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]788 lis r4,CONFIG_SYS_MONITOR_BASE@h /* Source Address */
789 ori r4,r4,CONFIG_SYS_MONITOR_BASE@l
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]790 lwz r5,GOT(__init_end)
791 sub r5,r5,r4
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]792 li r6,CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]793
794 /*
795 * Fix GOT pointer:
796 *
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]797 * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]798 *
799 * Offset:
800 */
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]801 sub r15,r10,r4
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]802
803 /* First our own GOT */
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]804 add r14,r14,r15
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]805 /* the the one used by the C code */
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]806 add r30,r30,r15
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]807
808 /*
809 * Now relocate code
810 */
811
812 cmplw cr1,r3,r4
813 addi r0,r5,3
814 srwi. r0,r0,2
815 beq cr1,4f /* In place copy is not necessary */
816 beq 7f /* Protect against 0 count */
817 mtctr r0
818 bge cr1,2f
819
820 la r8,-4(r4)
821 la r7,-4(r3)
8221: lwzu r0,4(r8)
823 stwu r0,4(r7)
824 bdnz 1b
825 b 4f
826
8272: slwi r0,r0,2
828 add r8,r4,r0
829 add r7,r3,r0
8303: lwzu r0,-4(r8)
831 stwu r0,-4(r7)
832 bdnz 3b
833
834/*
835 * Now flush the cache: note that we must start from a cache aligned
836 * address. Otherwise we might miss one cache line.
837 */
8384: cmpwi r6,0
839 add r5,r3,r5
840 beq 7f /* Always flush prefetch queue in any case */
841 subi r0,r6,1
842 andc r3,r3,r0
843 mr r4,r3
8445: dcbst 0,r4
845 add r4,r4,r6
846 cmplw r4,r5
847 blt 5b
848 sync /* Wait for all dcbst to complete on bus */
849 mr r4,r3
8506: icbi 0,r4
851 add r4,r4,r6
852 cmplw r4,r5
853 blt 6b
8547: sync /* Wait for all icbi to complete on bus */
855 isync
856
Wolfgang Denk29dcbd42005-10-05 00:00:54 +0200[diff] [blame]857 /*
858 * Re-point the IVPR at RAM
859 */
860 mtspr IVPR,r10
Wolfgang Denk9da240c2005-10-05 00:19:34 +0200[diff] [blame]861
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]862/*
863 * We are done. Do not return, instead branch to second part of board
864 * initialization, now running from RAM.
865 */
866
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]867 addi r0,r10,in_ram - _start + _START_OFFSET
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]868 mtlr r0
869 blr /* NEVER RETURNS! */
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]870 .globl in_ram
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]871in_ram:
872
873 /*
874 * Relocation Function, r14 point to got2+0x8000
875 *
876 * Adjust got2 pointers, no need to check for 0, this code
877 * already puts a few entries in the table.
878 */
879 li r0,__got2_entries@sectoff@l
880 la r3,GOT(_GOT2_TABLE_)
881 lwz r11,GOT(_GOT2_TABLE_)
882 mtctr r0
883 sub r11,r3,r11
884 addi r3,r3,-4
8851: lwzu r0,4(r3)
886 add r0,r0,r11
887 stw r0,0(r3)
888 bdnz 1b
889
890 /*
891 * Now adjust the fixups and the pointers to the fixups
892 * in case we need to move ourselves again.
893 */
8942: li r0,__fixup_entries@sectoff@l
895 lwz r3,GOT(_FIXUP_TABLE_)
896 cmpwi r0,0
897 mtctr r0
898 addi r3,r3,-4
899 beq 4f
9003: lwzu r4,4(r3)
901 lwzux r0,r4,r11
902 add r0,r0,r11
903 stw r10,0(r3)
904 stw r0,0(r4)
905 bdnz 3b
9064:
907clear_bss:
908 /*
909 * Now clear BSS segment
910 */
911 lwz r3,GOT(__bss_start)
912 lwz r4,GOT(_end)
913
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]914 cmplw 0,r3,r4
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]915 beq 6f
916
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]917 li r0,0
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]9185:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]919 stw r0,0(r3)
920 addi r3,r3,4
921 cmplw 0,r3,r4
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]922 bne 5b
9236:
924
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]925 mr r3,r9 /* Init Data pointer */
926 mr r4,r10 /* Destination Address */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]927 bl board_init_r
928
929 /*
930 * Copy exception vector code to low memory
931 *
932 * r3: dest_addr
933 * r7: source address, r8: end address, r9: target address
934 */
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]935 .globl trap_init
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]936trap_init:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]937 lwz r7,GOT(_start_of_vectors)
938 lwz r8,GOT(_end_of_vectors)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]939
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]940 li r9,0x100 /* reset vector always at 0x100 */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]941
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]942 cmplw 0,r7,r8
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]943 bgelr /* return if r7>=r8 - just in case */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]944
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]945 mflr r4 /* save link register */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]9461:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]947 lwz r0,0(r7)
948 stw r0,0(r9)
949 addi r7,r7,4
950 addi r9,r9,4
951 cmplw 0,r7,r8
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]952 bne 1b
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]953
954 /*
955 * relocate `hdlr' and `int_return' entries
956 */
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]957 li r7,.L_CriticalInput - _start + _START_OFFSET
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]958 bl trap_reloc
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]959 li r7,.L_MachineCheck - _start + _START_OFFSET
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]960 bl trap_reloc
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]961 li r7,.L_DataStorage - _start + _START_OFFSET
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]962 bl trap_reloc
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]963 li r7,.L_InstStorage - _start + _START_OFFSET
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]964 bl trap_reloc
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]965 li r7,.L_ExtInterrupt - _start + _START_OFFSET
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]966 bl trap_reloc
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]967 li r7,.L_Alignment - _start + _START_OFFSET
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]968 bl trap_reloc
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]969 li r7,.L_ProgramCheck - _start + _START_OFFSET
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]970 bl trap_reloc
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]971 li r7,.L_FPUnavailable - _start + _START_OFFSET
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]972 bl trap_reloc
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]973 li r7,.L_Decrementer - _start + _START_OFFSET
974 bl trap_reloc
975 li r7,.L_IntervalTimer - _start + _START_OFFSET
976 li r8,_end_of_vectors - _start + _START_OFFSET
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]9772:
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]978 bl trap_reloc
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]979 addi r7,r7,0x100 /* next exception vector */
980 cmplw 0,r7,r8
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]981 blt 2b
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]982
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]983 lis r7,0x0
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]984 mtspr IVPR,r7
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]985
wdenkf3da7cc2005-05-13 22:49:36 +0000[diff] [blame]986 mtlr r4 /* restore link register */
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]987 blr
988
989 /*
990 * Function: relocate entries for one exception vector
991 */
992trap_reloc:
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]993 lwz r0,0(r7) /* hdlr ... */
994 add r0,r0,r3 /* ... += dest_addr */
995 stw r0,0(r7)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]996
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]997 lwz r0,4(r7) /* int_return ... */
998 add r0,r0,r3 /* ... += dest_addr */
999 stw r0,4(r7)
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]1000
1001 blr
1002
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]1003.globl unlock_ram_in_cache
1004unlock_ram_in_cache:
1005 /* invalidate the INIT_RAM section */
Kumar Gala5c953ca2008-10-23 01:47:37 -0500[diff] [blame]1006 lis r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@h
1007 ori r3,r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@l
Kumar Gala938e14e2008-01-08 01:22:21 -0600[diff] [blame]1008 mfspr r4,L1CFG0
1009 andi. r4,r4,0x1ff
1010 slwi r4,r4,(10 - 1 - L1_CACHE_SHIFT)
Andy Flemingf08233c2007-08-14 01:34:21 -0500[diff] [blame]1011 mtctr r4
Kumar Gala2a441212008-02-27 16:30:47 -0600[diff] [blame]10121: dcbi r0,r3
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]1013 addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]1014 bdnz 1b
Kumar Gala2a441212008-02-27 16:30:47 -0600[diff] [blame]1015 sync
Andy Fleming5ba61fe2008-02-27 14:29:58 -0600[diff] [blame]1016
1017 /* Invalidate the TLB entries for the cache */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200[diff] [blame]1018 lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
1019 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
Andy Fleming5ba61fe2008-02-27 14:29:58 -0600[diff] [blame]1020 tlbivax 0,r3
1021 addi r3,r3,0x1000
1022 tlbivax 0,r3
1023 addi r3,r3,0x1000
1024 tlbivax 0,r3
1025 addi r3,r3,0x1000
1026 tlbivax 0,r3
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]1027 isync
1028 blr
Kumar Gala32090b32008-09-22 14:11:10 -0500[diff] [blame]1029
1030.globl flush_dcache
1031flush_dcache:
1032 mfspr r3,SPRN_L1CFG0
1033
1034 rlwinm r5,r3,9,3 /* Extract cache block size */
1035 twlgti r5,1 /* Only 32 and 64 byte cache blocks
1036 * are currently defined.
1037 */
1038 li r4,32
1039 subfic r6,r5,2 /* r6 = log2(1KiB / cache block size) -
1040 * log2(number of ways)
1041 */
1042 slw r5,r4,r5 /* r5 = cache block size */
1043
1044 rlwinm r7,r3,0,0xff /* Extract number of KiB in the cache */
1045 mulli r7,r7,13 /* An 8-way cache will require 13
1046 * loads per set.
1047 */
1048 slw r7,r7,r6
1049
1050 /* save off HID0 and set DCFA */
1051 mfspr r8,SPRN_HID0
1052 ori r9,r8,HID0_DCFA@l
1053 mtspr SPRN_HID0,r9
1054 isync
1055
1056 lis r4,0
1057 mtctr r7
1058
10591: lwz r3,0(r4) /* Load... */
1060 add r4,r4,r5
1061 bdnz 1b
1062
1063 msync
1064 lis r4,0
1065 mtctr r7
1066
10671: dcbf 0,r4 /* ...and flush. */
1068 add r4,r4,r5
1069 bdnz 1b
1070
1071 /* restore HID0 */
1072 mtspr SPRN_HID0,r8
1073 isync
1074
1075 blr