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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 54e091d3b603a3332c619199ca83a07e95960da4 / . / cpu / mpc85xx / start.S
blob: fc3c3368afb606772f4a8fdf39c1058157eddbf2 [file] [log] [blame]
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]1/*
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]2 * Copyright 2004, 2007 Freescale Semiconductor.
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]3 * Copyright (C) 2003 Motorola,Inc.
wdenk42d1f032003-10-15 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>
33#include <version.h>
34
35#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
36
37#include <ppc_asm.tmpl>
38#include <ppc_defs.h>
39
40#include <asm/cache.h>
41#include <asm/mmu.h>
42
43#ifndef CONFIG_IDENT_STRING
44#define CONFIG_IDENT_STRING ""
45#endif
46
47#undef MSR_KERNEL
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]48#define MSR_KERNEL ( MSR_ME ) /* Machine Check */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]49
50/*
51 * Set up GOT: Global Offset Table
52 *
53 * Use r14 to access the GOT
54 */
55 START_GOT
56 GOT_ENTRY(_GOT2_TABLE_)
57 GOT_ENTRY(_FIXUP_TABLE_)
58
59 GOT_ENTRY(_start)
60 GOT_ENTRY(_start_of_vectors)
61 GOT_ENTRY(_end_of_vectors)
62 GOT_ENTRY(transfer_to_handler)
63
64 GOT_ENTRY(__init_end)
65 GOT_ENTRY(_end)
66 GOT_ENTRY(__bss_start)
67 END_GOT
68
69/*
70 * e500 Startup -- after reset only the last 4KB of the effective
71 * address space is mapped in the MMU L2 TLB1 Entry0. The .bootpg
72 * section is located at THIS LAST page and basically does three
73 * things: clear some registers, set up exception tables and
74 * add more TLB entries for 'larger spaces'(e.g. the boot rom) to
75 * continue the boot procedure.
76
77 * Once the boot rom is mapped by TLB entries we can proceed
78 * with normal startup.
79 *
80 */
81
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]82 .section .bootpg,"ax"
83 .globl _start_e500
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]84
85_start_e500:
wdenk97d80fc2004-06-09 00:34:46 +0000[diff] [blame]86
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]87/* clear registers/arrays not reset by hardware */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]88
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]89 /* L1 */
90 li r0,2
91 mtspr L1CSR0,r0 /* invalidate d-cache */
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200[diff] [blame]92 mtspr L1CSR1,r0 /* invalidate i-cache */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]93
94 mfspr r1,DBSR
95 mtspr DBSR,r1 /* Clear all valid bits */
96
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]97 /*
98 * Enable L1 Caches early
99 *
100 */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]101
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]102 lis r2,L1CSR0_CPE@H /* enable parity */
103 ori r2,r2,L1CSR0_DCE
104 mtspr L1CSR0,r2 /* enable L1 Dcache */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]105 isync
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]106 mtspr L1CSR1,r2 /* enable L1 Icache */
107 isync
108 msync
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]109
110 /* Setup interrupt vectors */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]111 lis r1,TEXT_BASE@h
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]112 mtspr IVPR,r1
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]113
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]114 li r1,0x0100
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]115 mtspr IVOR0,r1 /* 0: Critical input */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]116 li r1,0x0200
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]117 mtspr IVOR1,r1 /* 1: Machine check */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]118 li r1,0x0300
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]119 mtspr IVOR2,r1 /* 2: Data storage */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]120 li r1,0x0400
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]121 mtspr IVOR3,r1 /* 3: Instruction storage */
122 li r1,0x0500
123 mtspr IVOR4,r1 /* 4: External interrupt */
124 li r1,0x0600
125 mtspr IVOR5,r1 /* 5: Alignment */
126 li r1,0x0700
127 mtspr IVOR6,r1 /* 6: Program check */
128 li r1,0x0800
129 mtspr IVOR7,r1 /* 7: floating point unavailable */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]130 li r1,0x0900
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]131 mtspr IVOR8,r1 /* 8: System call */
132 /* 9: Auxiliary processor unavailable(unsupported) */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]133 li r1,0x0a00
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]134 mtspr IVOR10,r1 /* 10: Decrementer */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]135 li r1,0x0b00
136 mtspr IVOR11,r1 /* 11: Interval timer */
137 li r1,0x0c00
Wolfgang Denk3e0bc442005-08-04 01:24:19 +0200[diff] [blame]138 mtspr IVOR12,r1 /* 12: Watchdog timer */
139 li r1,0x0d00
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]140 mtspr IVOR13,r1 /* 13: Data TLB error */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]141 li r1,0x0e00
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]142 mtspr IVOR14,r1 /* 14: Instruction TLB error */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]143 li r1,0x0f00
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]144 mtspr IVOR15,r1 /* 15: Debug */
145
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]146 /* Clear and set up some registers. */
Kumar Gala87163182008-01-16 22:38:34 -0600[diff] [blame]147 li r0,0x0000
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]148 lis r1,0xffff
149 mtspr DEC,r0 /* prevent dec exceptions */
150 mttbl r0 /* prevent fit & wdt exceptions */
151 mttbu r0
152 mtspr TSR,r1 /* clear all timer exception status */
153 mtspr TCR,r0 /* disable all */
154 mtspr ESR,r0 /* clear exception syndrome register */
155 mtspr MCSR,r0 /* machine check syndrome register */
156 mtxer r0 /* clear integer exception register */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]157
158 /* Enable Time Base and Select Time Base Clock */
wdenk0ac6f8b2004-07-09 23:27:13 +0000[diff] [blame]159 lis r0,HID0_EMCP@h /* Enable machine check */
Jon Loeligerd9b94f22005-07-25 14:05:07 -0500[diff] [blame]160#if defined(CONFIG_ENABLE_36BIT_PHYS)
Kumar Gala87163182008-01-16 22:38:34 -0600[diff] [blame]161 ori r0,r0,HID0_ENMAS7@l /* Enable MAS7 */
Jon Loeligerd9b94f22005-07-25 14:05:07 -0500[diff] [blame]162#endif
Kumar Gala87163182008-01-16 22:38:34 -0600[diff] [blame]163 ori r0,r0,HID0_TBEN@l /* Enable Timebase */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]164 mtspr HID0,r0
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]165
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]166 li r0,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]167 mtspr HID1,r0
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]168
169 /* Enable Branch Prediction */
170#if defined(CONFIG_BTB)
171 li r0,0x201 /* BBFI = 1, BPEN = 1 */
172 mtspr BUCSR,r0
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]173#endif
174
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]175#if defined(CONFIG_SYS_INIT_DBCR)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]176 lis r1,0xffff
177 ori r1,r1,0xffff
wdenk0ac6f8b2004-07-09 23:27:13 +0000[diff] [blame]178 mtspr DBSR,r1 /* Clear all status bits */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]179 lis r0,CONFIG_SYS_INIT_DBCR@h /* DBCR0[IDM] must be set */
180 ori r0,r0,CONFIG_SYS_INIT_DBCR@l
wdenk0ac6f8b2004-07-09 23:27:13 +0000[diff] [blame]181 mtspr DBCR0,r0
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]182#endif
183
Kumar Gala87163182008-01-16 22:38:34 -0600[diff] [blame]184 /* create a temp mapping in AS=1 to the boot window */
185 lis r6,FSL_BOOKE_MAS0(1, 15, 0)@h
186 ori r6,r6,FSL_BOOKE_MAS0(1, 15, 0)@l
187
188 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16M)@h
189 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16M)@l
190
Andrew Klossner24ef76f2008-07-02 07:03:53 -0700[diff] [blame]191 /* Align the mapping to 16MB */
192 lis r8,FSL_BOOKE_MAS2(TEXT_BASE & 0xff000000, (MAS2_I|MAS2_G))@h
193 ori r8,r8,FSL_BOOKE_MAS2(TEXT_BASE & 0xff000000, (MAS2_I|MAS2_G))@l
Kumar Gala87163182008-01-16 22:38:34 -0600[diff] [blame]194
Andrew Klossner24ef76f2008-07-02 07:03:53 -0700[diff] [blame]195 lis r9,FSL_BOOKE_MAS3(0xff000000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
196 ori r9,r9,FSL_BOOKE_MAS3(0xff000000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
Kumar Gala87163182008-01-16 22:38:34 -0600[diff] [blame]197
198 mtspr MAS0,r6
199 mtspr MAS1,r7
200 mtspr MAS2,r8
201 mtspr MAS3,r9
202 isync
203 msync
204 tlbwe
205
206 /* create a temp mapping in AS=1 to the stack */
207 lis r6,FSL_BOOKE_MAS0(1, 14, 0)@h
208 ori r6,r6,FSL_BOOKE_MAS0(1, 14, 0)@l
209
210 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@h
211 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@l
212
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]213 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@h
214 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@l
Kumar Gala87163182008-01-16 22:38:34 -0600[diff] [blame]215
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]216 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
217 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
Kumar Gala87163182008-01-16 22:38:34 -0600[diff] [blame]218
219 mtspr MAS0,r6
220 mtspr MAS1,r7
221 mtspr MAS2,r8
222 mtspr MAS3,r9
223 isync
224 msync
225 tlbwe
226
227 lis r6,MSR_CE|MSR_ME|MSR_DE|MSR_IS|MSR_DS@h
228 ori r6,r6,MSR_CE|MSR_ME|MSR_DE|MSR_IS|MSR_DS@l
229 lis r7,switch_as@h
230 ori r7,r7,switch_as@l
231
232 mtspr SPRN_SRR0,r7
233 mtspr SPRN_SRR1,r6
234 rfi
235
236switch_as:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]237/* L1 DCache is used for initial RAM */
238
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]239 /* Allocate Initial RAM in data cache.
240 */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]241 lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
242 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
Kumar Galab009f3e2008-01-08 01:22:21 -0600[diff] [blame]243 mfspr r2, L1CFG0
244 andi. r2, r2, 0x1ff
245 /* cache size * 1024 / (2 * L1 line size) */
246 slwi r2, r2, (10 - 1 - L1_CACHE_SHIFT)
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]247 mtctr r2
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]248 li r0,0
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]2491:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]250 dcbz r0,r3
251 dcbtls 0,r0,r3
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]252 addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]253 bdnz 1b
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]254
Kumar Gala3db0bef2007-08-07 18:07:27 -0500[diff] [blame]255 /* Jump out the last 4K page and continue to 'normal' start */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]256#ifdef CONFIG_SYS_RAMBOOT
Kumar Gala3db0bef2007-08-07 18:07:27 -0500[diff] [blame]257 b _start_cont
258#else
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]259 /* Calculate absolute address in FLASH and jump there */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]260 /*--------------------------------------------------------------*/
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]261 lis r3,CONFIG_SYS_MONITOR_BASE@h
262 ori r3,r3,CONFIG_SYS_MONITOR_BASE@l
Kumar Gala3db0bef2007-08-07 18:07:27 -0500[diff] [blame]263 addi r3,r3,_start_cont - _start + _START_OFFSET
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]264 mtlr r3
urwithsughosh@gmail.com1e701e72007-09-24 13:36:01 -0400[diff] [blame]265 blr
Kumar Gala3db0bef2007-08-07 18:07:27 -0500[diff] [blame]266#endif
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]267
Kumar Gala3db0bef2007-08-07 18:07:27 -0500[diff] [blame]268 .text
269 .globl _start
270_start:
271 .long 0x27051956 /* U-BOOT Magic Number */
272 .globl version_string
273version_string:
274 .ascii U_BOOT_VERSION
275 .ascii " (", __DATE__, " - ", __TIME__, ")"
276 .ascii CONFIG_IDENT_STRING, "\0"
277
278 .align 4
279 .globl _start_cont
280_start_cont:
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]281 /* Setup the stack in initial RAM,could be L2-as-SRAM or L1 dcache*/
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]282 lis r1,CONFIG_SYS_INIT_RAM_ADDR@h
283 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]284
285 li r0,0
286 stwu r0,-4(r1)
287 stwu r0,-4(r1) /* Terminate call chain */
288
289 stwu r1,-8(r1) /* Save back chain and move SP */
290 lis r0,RESET_VECTOR@h /* Address of reset vector */
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]291 ori r0,r0,RESET_VECTOR@l
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]292 stwu r1,-8(r1) /* Save back chain and move SP */
293 stw r0,+12(r1) /* Save return addr (underflow vect) */
294
295 GET_GOT
Kumar Gala87163182008-01-16 22:38:34 -0600[diff] [blame]296 bl cpu_init_early_f
297
298 /* switch back to AS = 0 */
299 lis r3,(MSR_CE|MSR_ME|MSR_DE)@h
300 ori r3,r3,(MSR_CE|MSR_ME|MSR_DE)@l
301 mtmsr r3
302 isync
303
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]304 bl cpu_init_f
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]305 bl board_init_f
wdenk0ac6f8b2004-07-09 23:27:13 +0000[diff] [blame]306 isync
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]307
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]308 . = EXC_OFF_SYS_RESET
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]309 .globl _start_of_vectors
310_start_of_vectors:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]311
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]312/* Critical input. */
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]313 CRIT_EXCEPTION(0x0100, CriticalInput, CritcalInputException)
314
315/* Machine check */
316 MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]317
318/* Data Storage exception. */
319 STD_EXCEPTION(0x0300, DataStorage, UnknownException)
320
321/* Instruction Storage exception. */
322 STD_EXCEPTION(0x0400, InstStorage, UnknownException)
323
324/* External Interrupt exception. */
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]325 STD_EXCEPTION(0x0500, ExtInterrupt, ExtIntException)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]326
327/* Alignment exception. */
328 . = 0x0600
329Alignment:
Rafal Jaworowski02032e82007-06-22 14:58:04 +0200[diff] [blame]330 EXCEPTION_PROLOG(SRR0, SRR1)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]331 mfspr r4,DAR
332 stw r4,_DAR(r21)
333 mfspr r5,DSISR
334 stw r5,_DSISR(r21)
335 addi r3,r1,STACK_FRAME_OVERHEAD
336 li r20,MSR_KERNEL
337 rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */
338 lwz r6,GOT(transfer_to_handler)
339 mtlr r6
340 blrl
341.L_Alignment:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]342 .long AlignmentException - _start + _START_OFFSET
343 .long int_return - _start + _START_OFFSET
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]344
345/* Program check exception */
346 . = 0x0700
347ProgramCheck:
Rafal Jaworowski02032e82007-06-22 14:58:04 +0200[diff] [blame]348 EXCEPTION_PROLOG(SRR0, SRR1)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]349 addi r3,r1,STACK_FRAME_OVERHEAD
350 li r20,MSR_KERNEL
351 rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */
352 lwz r6,GOT(transfer_to_handler)
353 mtlr r6
354 blrl
355.L_ProgramCheck:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]356 .long ProgramCheckException - _start + _START_OFFSET
357 .long int_return - _start + _START_OFFSET
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]358
359 /* No FPU on MPC85xx. This exception is not supposed to happen.
360 */
361 STD_EXCEPTION(0x0800, FPUnavailable, UnknownException)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]362
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]363 . = 0x0900
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]364/*
365 * r0 - SYSCALL number
366 * r3-... arguments
367 */
368SystemCall:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]369 addis r11,r0,0 /* get functions table addr */
370 ori r11,r11,0 /* Note: this code is patched in trap_init */
371 addis r12,r0,0 /* get number of functions */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]372 ori r12,r12,0
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]373
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]374 cmplw 0,r0,r12
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]375 bge 1f
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]376
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]377 rlwinm r0,r0,2,0,31 /* fn_addr = fn_tbl[r0] */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]378 add r11,r11,r0
379 lwz r11,0(r11)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]380
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]381 li r20,0xd00-4 /* Get stack pointer */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]382 lwz r12,0(r20)
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]383 subi r12,r12,12 /* Adjust stack pointer */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]384 li r0,0xc00+_end_back-SystemCall
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]385 cmplw 0,r0,r12 /* Check stack overflow */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]386 bgt 1f
387 stw r12,0(r20)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]388
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]389 mflr r0
390 stw r0,0(r12)
391 mfspr r0,SRR0
392 stw r0,4(r12)
393 mfspr r0,SRR1
394 stw r0,8(r12)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]395
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]396 li r12,0xc00+_back-SystemCall
397 mtlr r12
398 mtspr SRR0,r11
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]399
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]4001: SYNC
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]401 rfi
402_back:
403
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]404 mfmsr r11 /* Disable interrupts */
405 li r12,0
406 ori r12,r12,MSR_EE
407 andc r11,r11,r12
408 SYNC /* Some chip revs need this... */
409 mtmsr r11
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]410 SYNC
411
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]412 li r12,0xd00-4 /* restore regs */
413 lwz r12,0(r12)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]414
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]415 lwz r11,0(r12)
416 mtlr r11
417 lwz r11,4(r12)
418 mtspr SRR0,r11
419 lwz r11,8(r12)
420 mtspr SRR1,r11
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]421
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]422 addi r12,r12,12 /* Adjust stack pointer */
423 li r20,0xd00-4
424 stw r12,0(r20)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]425
426 SYNC
427 rfi
428_end_back:
429
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]430 STD_EXCEPTION(0x0a00, Decrementer, timer_interrupt)
431 STD_EXCEPTION(0x0b00, IntervalTimer, UnknownException)
432 STD_EXCEPTION(0x0c00, WatchdogTimer, UnknownException)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]433
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]434 STD_EXCEPTION(0x0d00, DataTLBError, UnknownException)
435 STD_EXCEPTION(0x0e00, InstructionTLBError, UnknownException)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]436
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]437 CRIT_EXCEPTION(0x0f00, DebugBreakpoint, DebugException )
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]438
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]439 .globl _end_of_vectors
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]440_end_of_vectors:
441
442
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]443 . = . + (0x100 - ( . & 0xff )) /* align for debug */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]444
445/*
446 * This code finishes saving the registers to the exception frame
447 * and jumps to the appropriate handler for the exception.
448 * Register r21 is pointer into trap frame, r1 has new stack pointer.
449 */
450 .globl transfer_to_handler
451transfer_to_handler:
452 stw r22,_NIP(r21)
453 lis r22,MSR_POW@h
454 andc r23,r23,r22
455 stw r23,_MSR(r21)
456 SAVE_GPR(7, r21)
457 SAVE_4GPRS(8, r21)
458 SAVE_8GPRS(12, r21)
459 SAVE_8GPRS(24, r21)
460
461 mflr r23
462 andi. r24,r23,0x3f00 /* get vector offset */
463 stw r24,TRAP(r21)
464 li r22,0
465 stw r22,RESULT(r21)
466 mtspr SPRG2,r22 /* r1 is now kernel sp */
467
468 lwz r24,0(r23) /* virtual address of handler */
469 lwz r23,4(r23) /* where to go when done */
470 mtspr SRR0,r24
471 mtspr SRR1,r20
472 mtlr r23
473 SYNC
474 rfi /* jump to handler, enable MMU */
475
476int_return:
477 mfmsr r28 /* Disable interrupts */
478 li r4,0
479 ori r4,r4,MSR_EE
480 andc r28,r28,r4
481 SYNC /* Some chip revs need this... */
482 mtmsr r28
483 SYNC
484 lwz r2,_CTR(r1)
485 lwz r0,_LINK(r1)
486 mtctr r2
487 mtlr r0
488 lwz r2,_XER(r1)
489 lwz r0,_CCR(r1)
490 mtspr XER,r2
491 mtcrf 0xFF,r0
492 REST_10GPRS(3, r1)
493 REST_10GPRS(13, r1)
494 REST_8GPRS(23, r1)
495 REST_GPR(31, r1)
496 lwz r2,_NIP(r1) /* Restore environment */
497 lwz r0,_MSR(r1)
498 mtspr SRR0,r2
499 mtspr SRR1,r0
500 lwz r0,GPR0(r1)
501 lwz r2,GPR2(r1)
502 lwz r1,GPR1(r1)
503 SYNC
504 rfi
505
506crit_return:
507 mfmsr r28 /* Disable interrupts */
508 li r4,0
509 ori r4,r4,MSR_EE
510 andc r28,r28,r4
511 SYNC /* Some chip revs need this... */
512 mtmsr r28
513 SYNC
514 lwz r2,_CTR(r1)
515 lwz r0,_LINK(r1)
516 mtctr r2
517 mtlr r0
518 lwz r2,_XER(r1)
519 lwz r0,_CCR(r1)
520 mtspr XER,r2
521 mtcrf 0xFF,r0
522 REST_10GPRS(3, r1)
523 REST_10GPRS(13, r1)
524 REST_8GPRS(23, r1)
525 REST_GPR(31, r1)
526 lwz r2,_NIP(r1) /* Restore environment */
527 lwz r0,_MSR(r1)
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]528 mtspr SPRN_CSRR0,r2
529 mtspr SPRN_CSRR1,r0
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]530 lwz r0,GPR0(r1)
531 lwz r2,GPR2(r1)
532 lwz r1,GPR1(r1)
533 SYNC
534 rfci
535
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]536mck_return:
537 mfmsr r28 /* Disable interrupts */
538 li r4,0
539 ori r4,r4,MSR_EE
540 andc r28,r28,r4
541 SYNC /* Some chip revs need this... */
542 mtmsr r28
543 SYNC
544 lwz r2,_CTR(r1)
545 lwz r0,_LINK(r1)
546 mtctr r2
547 mtlr r0
548 lwz r2,_XER(r1)
549 lwz r0,_CCR(r1)
550 mtspr XER,r2
551 mtcrf 0xFF,r0
552 REST_10GPRS(3, r1)
553 REST_10GPRS(13, r1)
554 REST_8GPRS(23, r1)
555 REST_GPR(31, r1)
556 lwz r2,_NIP(r1) /* Restore environment */
557 lwz r0,_MSR(r1)
558 mtspr SPRN_MCSRR0,r2
559 mtspr SPRN_MCSRR1,r0
560 lwz r0,GPR0(r1)
561 lwz r2,GPR2(r1)
562 lwz r1,GPR1(r1)
563 SYNC
564 rfmci
565
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]566/* Cache functions.
567*/
Kumar Gala54e091d2008-09-22 14:11:10 -0500[diff] [blame^]568.globl invalidate_icache
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]569invalidate_icache:
570 mfspr r0,L1CSR1
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]571 ori r0,r0,L1CSR1_ICFI
572 msync
573 isync
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]574 mtspr L1CSR1,r0
575 isync
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]576 blr /* entire I cache */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]577
Kumar Gala54e091d2008-09-22 14:11:10 -0500[diff] [blame^]578.globl invalidate_dcache
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]579invalidate_dcache:
580 mfspr r0,L1CSR0
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]581 ori r0,r0,L1CSR0_DCFI
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]582 msync
583 isync
584 mtspr L1CSR0,r0
585 isync
586 blr
587
588 .globl icache_enable
589icache_enable:
590 mflr r8
591 bl invalidate_icache
592 mtlr r8
593 isync
594 mfspr r4,L1CSR1
595 ori r4,r4,0x0001
596 oris r4,r4,0x0001
597 mtspr L1CSR1,r4
598 isync
599 blr
600
601 .globl icache_disable
602icache_disable:
603 mfspr r0,L1CSR1
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]604 lis r3,0
605 ori r3,r3,L1CSR1_ICE
606 andc r0,r0,r3
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]607 mtspr L1CSR1,r0
608 isync
609 blr
610
611 .globl icache_status
612icache_status:
613 mfspr r3,L1CSR1
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]614 andi. r3,r3,L1CSR1_ICE
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]615 blr
616
617 .globl dcache_enable
618dcache_enable:
619 mflr r8
620 bl invalidate_dcache
621 mtlr r8
622 isync
623 mfspr r0,L1CSR0
624 ori r0,r0,0x0001
625 oris r0,r0,0x0001
626 msync
627 isync
628 mtspr L1CSR0,r0
629 isync
630 blr
631
632 .globl dcache_disable
633dcache_disable:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]634 mfspr r3,L1CSR0
635 lis r4,0
636 ori r4,r4,L1CSR0_DCE
637 andc r3,r3,r4
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]638 mtspr L1CSR0,r0
639 isync
640 blr
641
642 .globl dcache_status
643dcache_status:
644 mfspr r3,L1CSR0
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]645 andi. r3,r3,L1CSR0_DCE
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]646 blr
647
648 .globl get_pir
649get_pir:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]650 mfspr r3,PIR
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]651 blr
652
653 .globl get_pvr
654get_pvr:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]655 mfspr r3,PVR
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]656 blr
657
wdenk97d80fc2004-06-09 00:34:46 +0000[diff] [blame]658 .globl get_svr
659get_svr:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]660 mfspr r3,SVR
wdenk97d80fc2004-06-09 00:34:46 +0000[diff] [blame]661 blr
662
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]663 .globl wr_tcr
664wr_tcr:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]665 mtspr TCR,r3
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]666 blr
667
668/*------------------------------------------------------------------------------- */
669/* Function: in8 */
670/* Description: Input 8 bits */
671/*------------------------------------------------------------------------------- */
672 .globl in8
673in8:
674 lbz r3,0x0000(r3)
675 blr
676
677/*------------------------------------------------------------------------------- */
678/* Function: out8 */
679/* Description: Output 8 bits */
680/*------------------------------------------------------------------------------- */
681 .globl out8
682out8:
683 stb r4,0x0000(r3)
Ed Swarthout1487adb2007-09-26 16:35:54 -0500[diff] [blame]684 sync
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]685 blr
686
687/*------------------------------------------------------------------------------- */
688/* Function: out16 */
689/* Description: Output 16 bits */
690/*------------------------------------------------------------------------------- */
691 .globl out16
692out16:
693 sth r4,0x0000(r3)
Ed Swarthout1487adb2007-09-26 16:35:54 -0500[diff] [blame]694 sync
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]695 blr
696
697/*------------------------------------------------------------------------------- */
698/* Function: out16r */
699/* Description: Byte reverse and output 16 bits */
700/*------------------------------------------------------------------------------- */
701 .globl out16r
702out16r:
703 sthbrx r4,r0,r3
Ed Swarthout1487adb2007-09-26 16:35:54 -0500[diff] [blame]704 sync
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]705 blr
706
707/*------------------------------------------------------------------------------- */
708/* Function: out32 */
709/* Description: Output 32 bits */
710/*------------------------------------------------------------------------------- */
711 .globl out32
712out32:
713 stw r4,0x0000(r3)
Ed Swarthout1487adb2007-09-26 16:35:54 -0500[diff] [blame]714 sync
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]715 blr
716
717/*------------------------------------------------------------------------------- */
718/* Function: out32r */
719/* Description: Byte reverse and output 32 bits */
720/*------------------------------------------------------------------------------- */
721 .globl out32r
722out32r:
723 stwbrx r4,r0,r3
Ed Swarthout1487adb2007-09-26 16:35:54 -0500[diff] [blame]724 sync
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]725 blr
726
727/*------------------------------------------------------------------------------- */
728/* Function: in16 */
729/* Description: Input 16 bits */
730/*------------------------------------------------------------------------------- */
731 .globl in16
732in16:
733 lhz r3,0x0000(r3)
734 blr
735
736/*------------------------------------------------------------------------------- */
737/* Function: in16r */
738/* Description: Input 16 bits and byte reverse */
739/*------------------------------------------------------------------------------- */
740 .globl in16r
741in16r:
742 lhbrx r3,r0,r3
743 blr
744
745/*------------------------------------------------------------------------------- */
746/* Function: in32 */
747/* Description: Input 32 bits */
748/*------------------------------------------------------------------------------- */
749 .globl in32
750in32:
751 lwz 3,0x0000(3)
752 blr
753
754/*------------------------------------------------------------------------------- */
755/* Function: in32r */
756/* Description: Input 32 bits and byte reverse */
757/*------------------------------------------------------------------------------- */
758 .globl in32r
759in32r:
760 lwbrx r3,r0,r3
761 blr
762
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]763/*------------------------------------------------------------------------------*/
764
765/*
766 * void relocate_code (addr_sp, gd, addr_moni)
767 *
768 * This "function" does not return, instead it continues in RAM
769 * after relocating the monitor code.
770 *
771 * r3 = dest
772 * r4 = src
773 * r5 = length in bytes
774 * r6 = cachelinesize
775 */
776 .globl relocate_code
777relocate_code:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]778 mr r1,r3 /* Set new stack pointer */
779 mr r9,r4 /* Save copy of Init Data pointer */
780 mr r10,r5 /* Save copy of Destination Address */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]781
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]782 mr r3,r5 /* Destination Address */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]783 lis r4,CONFIG_SYS_MONITOR_BASE@h /* Source Address */
784 ori r4,r4,CONFIG_SYS_MONITOR_BASE@l
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]785 lwz r5,GOT(__init_end)
786 sub r5,r5,r4
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]787 li r6,CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]788
789 /*
790 * Fix GOT pointer:
791 *
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]792 * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]793 *
794 * Offset:
795 */
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]796 sub r15,r10,r4
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]797
798 /* First our own GOT */
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]799 add r14,r14,r15
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]800 /* the the one used by the C code */
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]801 add r30,r30,r15
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]802
803 /*
804 * Now relocate code
805 */
806
807 cmplw cr1,r3,r4
808 addi r0,r5,3
809 srwi. r0,r0,2
810 beq cr1,4f /* In place copy is not necessary */
811 beq 7f /* Protect against 0 count */
812 mtctr r0
813 bge cr1,2f
814
815 la r8,-4(r4)
816 la r7,-4(r3)
8171: lwzu r0,4(r8)
818 stwu r0,4(r7)
819 bdnz 1b
820 b 4f
821
8222: slwi r0,r0,2
823 add r8,r4,r0
824 add r7,r3,r0
8253: lwzu r0,-4(r8)
826 stwu r0,-4(r7)
827 bdnz 3b
828
829/*
830 * Now flush the cache: note that we must start from a cache aligned
831 * address. Otherwise we might miss one cache line.
832 */
8334: cmpwi r6,0
834 add r5,r3,r5
835 beq 7f /* Always flush prefetch queue in any case */
836 subi r0,r6,1
837 andc r3,r3,r0
838 mr r4,r3
8395: dcbst 0,r4
840 add r4,r4,r6
841 cmplw r4,r5
842 blt 5b
843 sync /* Wait for all dcbst to complete on bus */
844 mr r4,r3
8456: icbi 0,r4
846 add r4,r4,r6
847 cmplw r4,r5
848 blt 6b
8497: sync /* Wait for all icbi to complete on bus */
850 isync
851
Wolfgang Denk7d314992005-10-05 00:00:54 +0200[diff] [blame]852 /*
853 * Re-point the IVPR at RAM
854 */
855 mtspr IVPR,r10
Wolfgang Denk99b0d282005-10-05 00:19:34 +0200[diff] [blame]856
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]857/*
858 * We are done. Do not return, instead branch to second part of board
859 * initialization, now running from RAM.
860 */
861
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]862 addi r0,r10,in_ram - _start + _START_OFFSET
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]863 mtlr r0
864 blr /* NEVER RETURNS! */
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]865 .globl in_ram
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]866in_ram:
867
868 /*
869 * Relocation Function, r14 point to got2+0x8000
870 *
871 * Adjust got2 pointers, no need to check for 0, this code
872 * already puts a few entries in the table.
873 */
874 li r0,__got2_entries@sectoff@l
875 la r3,GOT(_GOT2_TABLE_)
876 lwz r11,GOT(_GOT2_TABLE_)
877 mtctr r0
878 sub r11,r3,r11
879 addi r3,r3,-4
8801: lwzu r0,4(r3)
881 add r0,r0,r11
882 stw r0,0(r3)
883 bdnz 1b
884
885 /*
886 * Now adjust the fixups and the pointers to the fixups
887 * in case we need to move ourselves again.
888 */
8892: li r0,__fixup_entries@sectoff@l
890 lwz r3,GOT(_FIXUP_TABLE_)
891 cmpwi r0,0
892 mtctr r0
893 addi r3,r3,-4
894 beq 4f
8953: lwzu r4,4(r3)
896 lwzux r0,r4,r11
897 add r0,r0,r11
898 stw r10,0(r3)
899 stw r0,0(r4)
900 bdnz 3b
9014:
902clear_bss:
903 /*
904 * Now clear BSS segment
905 */
906 lwz r3,GOT(__bss_start)
907 lwz r4,GOT(_end)
908
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]909 cmplw 0,r3,r4
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]910 beq 6f
911
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]912 li r0,0
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]9135:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]914 stw r0,0(r3)
915 addi r3,r3,4
916 cmplw 0,r3,r4
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]917 bne 5b
9186:
919
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]920 mr r3,r9 /* Init Data pointer */
921 mr r4,r10 /* Destination Address */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]922 bl board_init_r
923
924 /*
925 * Copy exception vector code to low memory
926 *
927 * r3: dest_addr
928 * r7: source address, r8: end address, r9: target address
929 */
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]930 .globl trap_init
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]931trap_init:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]932 lwz r7,GOT(_start_of_vectors)
933 lwz r8,GOT(_end_of_vectors)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]934
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]935 li r9,0x100 /* reset vector always at 0x100 */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]936
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]937 cmplw 0,r7,r8
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]938 bgelr /* return if r7>=r8 - just in case */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]939
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]940 mflr r4 /* save link register */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]9411:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]942 lwz r0,0(r7)
943 stw r0,0(r9)
944 addi r7,r7,4
945 addi r9,r9,4
946 cmplw 0,r7,r8
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]947 bne 1b
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]948
949 /*
950 * relocate `hdlr' and `int_return' entries
951 */
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]952 li r7,.L_CriticalInput - _start + _START_OFFSET
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]953 bl trap_reloc
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]954 li r7,.L_MachineCheck - _start + _START_OFFSET
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]955 bl trap_reloc
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]956 li r7,.L_DataStorage - _start + _START_OFFSET
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]957 bl trap_reloc
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]958 li r7,.L_InstStorage - _start + _START_OFFSET
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]959 bl trap_reloc
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]960 li r7,.L_ExtInterrupt - _start + _START_OFFSET
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]961 bl trap_reloc
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]962 li r7,.L_Alignment - _start + _START_OFFSET
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]963 bl trap_reloc
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]964 li r7,.L_ProgramCheck - _start + _START_OFFSET
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]965 bl trap_reloc
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]966 li r7,.L_FPUnavailable - _start + _START_OFFSET
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]967 bl trap_reloc
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]968 li r7,.L_Decrementer - _start + _START_OFFSET
969 bl trap_reloc
970 li r7,.L_IntervalTimer - _start + _START_OFFSET
971 li r8,_end_of_vectors - _start + _START_OFFSET
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]9722:
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]973 bl trap_reloc
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]974 addi r7,r7,0x100 /* next exception vector */
975 cmplw 0,r7,r8
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]976 blt 2b
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]977
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]978 lis r7,0x0
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]979 mtspr IVPR,r7
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]980
wdenk343117b2005-05-13 22:49:36 +0000[diff] [blame]981 mtlr r4 /* restore link register */
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]982 blr
983
984 /*
985 * Function: relocate entries for one exception vector
986 */
987trap_reloc:
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]988 lwz r0,0(r7) /* hdlr ... */
989 add r0,r0,r3 /* ... += dest_addr */
990 stw r0,0(r7)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]991
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]992 lwz r0,4(r7) /* int_return ... */
993 add r0,r0,r3 /* ... += dest_addr */
994 stw r0,4(r7)
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]995
996 blr
997
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]998.globl unlock_ram_in_cache
999unlock_ram_in_cache:
1000 /* invalidate the INIT_RAM section */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]1001 lis r3,(CONFIG_SYS_INIT_RAM_ADDR & ~31)@h
1002 ori r3,r3,(CONFIG_SYS_INIT_RAM_ADDR & ~31)@l
Kumar Galab009f3e2008-01-08 01:22:21 -0600[diff] [blame]1003 mfspr r4,L1CFG0
1004 andi. r4,r4,0x1ff
1005 slwi r4,r4,(10 - 1 - L1_CACHE_SHIFT)
Andy Fleming61a21e92007-08-14 01:34:21 -0500[diff] [blame]1006 mtctr r4
Kumar Gala2b22fa42008-02-27 16:30:47 -0600[diff] [blame]10071: dcbi r0,r3
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]1008 addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]1009 bdnz 1b
Kumar Gala2b22fa42008-02-27 16:30:47 -0600[diff] [blame]1010 sync
Andy Fleming21fae8b2008-02-27 14:29:58 -0600[diff] [blame]1011
1012 /* Invalidate the TLB entries for the cache */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]1013 lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
1014 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
Andy Fleming21fae8b2008-02-27 14:29:58 -0600[diff] [blame]1015 tlbivax 0,r3
1016 addi r3,r3,0x1000
1017 tlbivax 0,r3
1018 addi r3,r3,0x1000
1019 tlbivax 0,r3
1020 addi r3,r3,0x1000
1021 tlbivax 0,r3
wdenk42d1f032003-10-15 23:53:47 +0000[diff] [blame]1022 isync
1023 blr
Kumar Gala54e091d2008-09-22 14:11:10 -0500[diff] [blame^]1024
1025.globl flush_dcache
1026flush_dcache:
1027 mfspr r3,SPRN_L1CFG0
1028
1029 rlwinm r5,r3,9,3 /* Extract cache block size */
1030 twlgti r5,1 /* Only 32 and 64 byte cache blocks
1031 * are currently defined.
1032 */
1033 li r4,32
1034 subfic r6,r5,2 /* r6 = log2(1KiB / cache block size) -
1035 * log2(number of ways)
1036 */
1037 slw r5,r4,r5 /* r5 = cache block size */
1038
1039 rlwinm r7,r3,0,0xff /* Extract number of KiB in the cache */
1040 mulli r7,r7,13 /* An 8-way cache will require 13
1041 * loads per set.
1042 */
1043 slw r7,r7,r6
1044
1045 /* save off HID0 and set DCFA */
1046 mfspr r8,SPRN_HID0
1047 ori r9,r8,HID0_DCFA@l
1048 mtspr SPRN_HID0,r9
1049 isync
1050
1051 lis r4,0
1052 mtctr r7
1053
10541: lwz r3,0(r4) /* Load... */
1055 add r4,r4,r5
1056 bdnz 1b
1057
1058 msync
1059 lis r4,0
1060 mtctr r7
1061
10621: dcbf 0,r4 /* ...and flush. */
1063 add r4,r4,r5
1064 bdnz 1b
1065
1066 /* restore HID0 */
1067 mtspr SPRN_HID0,r8
1068 isync
1069
1070 blr