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0e870980 1/*
69bcf5bc 2 * Copyright 2008-2010 Freescale Semiconductor, Inc.
0e870980
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3 * Kumar Gala <kumar.gala@freescale.com>
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
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24#include <config.h>
25#include <mpc85xx.h>
26#include <version.h>
27
28#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
29
30#include <ppc_asm.tmpl>
31#include <ppc_defs.h>
32
33#include <asm/cache.h>
34#include <asm/mmu.h>
35
36/* To boot secondary cpus, we need a place for them to start up.
37 * Normally, they start at 0xfffffffc, but that's usually the
38 * firmware, and we don't want to have to run the firmware again.
39 * Instead, the primary cpu will set the BPTR to point here to
40 * this page. We then set up the core, and head to
41 * start_secondary. Note that this means that the code below
42 * must never exceed 1023 instructions (the branch at the end
43 * would then be the 1024th).
44 */
45 .globl __secondary_start_page
46 .align 12
47__secondary_start_page:
48/* First do some preliminary setup */
49 lis r3, HID0_EMCP@h /* enable machine check */
0f060c3b 50#ifndef CONFIG_E500MC
ec2b74ff 51 ori r3,r3,HID0_TBEN@l /* enable Timebase */
0f060c3b 52#endif
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53#ifdef CONFIG_PHYS_64BIT
54 ori r3,r3,HID0_ENMAS7@l /* enable MAS7 updates */
55#endif
56 mtspr SPRN_HID0,r3
57
0f060c3b 58#ifndef CONFIG_E500MC
ec2b74ff 59 li r3,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */
ff8473e9
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60 mfspr r0,PVR
61 andi. r0,r0,0xff
62 cmpwi r0,0x50@l /* if we are rev 5.0 or greater set MBDD */
63 blt 1f
64 /* Set MBDD bit also */
65 ori r3, r3, HID1_MBDD@l
661:
ec2b74ff 67 mtspr SPRN_HID1,r3
0f060c3b 68#endif
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69
70 /* Enable branch prediction */
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71 lis r3,BUCSR_ENABLE@h
72 ori r3,r3,BUCSR_ENABLE@l
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73 mtspr SPRN_BUCSR,r3
74
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75 /* Ensure TB is 0 */
76 li r3,0
77 mttbl r3
78 mttbu r3
79
ec2b74ff 80 /* Enable/invalidate the I-Cache */
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81 lis r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
82 ori r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
83 mtspr SPRN_L1CSR1,r2
841:
85 mfspr r3,SPRN_L1CSR1
86 and. r1,r3,r2
87 bne 1b
88
89 lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h
90 ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
91 mtspr SPRN_L1CSR1,r3
ec2b74ff 92 isync
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932:
94 mfspr r3,SPRN_L1CSR1
95 andi. r1,r3,L1CSR1_ICE@l
96 beq 2b
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97
98 /* Enable/invalidate the D-Cache */
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99 lis r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h
100 ori r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l
101 mtspr SPRN_L1CSR0,r2
1021:
103 mfspr r3,SPRN_L1CSR0
104 and. r1,r3,r2
105 bne 1b
106
107 lis r3,(L1CSR0_CPE|L1CSR0_DCE)@h
108 ori r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l
109 mtspr SPRN_L1CSR0,r3
ec2b74ff 110 isync
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1112:
112 mfspr r3,SPRN_L1CSR0
113 andi. r1,r3,L1CSR0_DCE@l
114 beq 2b
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115
116#define toreset(x) (x - __secondary_start_page + 0xfffff000)
117
118 /* get our PIR to figure out our table entry */
119 lis r3,toreset(__spin_table)@h
120 ori r3,r3,toreset(__spin_table)@l
121
79679d80 122 /* r10 has the base address for the entry */
ec2b74ff 123 mfspr r0,SPRN_PIR
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124#ifdef CONFIG_E500MC
125 rlwinm r4,r0,27,27,31
126#else
ec2b74ff 127 mr r4,r0
0f060c3b 128#endif
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129 slwi r8,r4,5
130 add r10,r3,r8
131
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132#if defined(CONFIG_E500MC) && defined(CONFIG_SYS_CACHE_STASHING)
133 /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */
134 slwi r8,r4,1
135 addi r8,r8,32
136 mtspr L1CSR2,r8
137#endif
138
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139#ifdef CONFIG_BACKSIDE_L2_CACHE
140 /* Enable/invalidate the L2 cache */
141 msync
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142 lis r2,(L2CSR0_L2FI|L2CSR0_L2LFC)@h
143 ori r2,r2,(L2CSR0_L2FI|L2CSR0_L2LFC)@l
144 mtspr SPRN_L2CSR0,r2
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1451:
146 mfspr r3,SPRN_L2CSR0
ff882295 147 and. r1,r3,r2
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148 bne 1b
149
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150#ifdef CONFIG_SYS_CACHE_STASHING
151 /* set stash id to (coreID) * 2 + 32 + L2 (1) */
152 addi r3,r8,1
153 mtspr SPRN_L2CSR1,r3
154#endif
155
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156 lis r3,CONFIG_SYS_INIT_L2CSR0@h
157 ori r3,r3,CONFIG_SYS_INIT_L2CSR0@l
158 mtspr SPRN_L2CSR0,r3
159 isync
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1602:
161 mfspr r3,SPRN_L2CSR0
162 andis. r1,r3,L2CSR0_L2E@h
163 beq 2b
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164#endif
165
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166#define EPAPR_MAGIC (0x45504150)
167#define ENTRY_ADDR_UPPER 0
168#define ENTRY_ADDR_LOWER 4
169#define ENTRY_R3_UPPER 8
170#define ENTRY_R3_LOWER 12
171#define ENTRY_RESV 16
172#define ENTRY_PIR 20
173#define ENTRY_R6_UPPER 24
174#define ENTRY_R6_LOWER 28
175#define ENTRY_SIZE 32
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176
177 /* setup the entry */
79679d80 178 li r3,0
ec2b74ff 179 li r8,1
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180 stw r0,ENTRY_PIR(r10)
181 stw r3,ENTRY_ADDR_UPPER(r10)
182 stw r8,ENTRY_ADDR_LOWER(r10)
183 stw r3,ENTRY_R3_UPPER(r10)
184 stw r4,ENTRY_R3_LOWER(r10)
185 stw r3,ENTRY_R6_UPPER(r10)
186 stw r3,ENTRY_R6_LOWER(r10)
187
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PT
188 /* load r13 with the address of the 'bootpg' in SDRAM */
189 lis r13,toreset(__bootpg_addr)@h
190 ori r13,r13,toreset(__bootpg_addr)@l
191 lwz r13,0(r13)
192
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193 /* setup mapping for AS = 1, and jump there */
194 lis r11,(MAS0_TLBSEL(1)|MAS0_ESEL(1))@h
195 mtspr SPRN_MAS0,r11
196 lis r11,(MAS1_VALID|MAS1_IPROT)@h
197 ori r11,r11,(MAS1_TS|MAS1_TSIZE(BOOKE_PAGESZ_4K))@l
198 mtspr SPRN_MAS1,r11
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199 oris r11,r13,(MAS2_I|MAS2_G)@h
200 ori r11,r13,(MAS2_I|MAS2_G)@l
79679d80 201 mtspr SPRN_MAS2,r11
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202 oris r11,r13,(MAS3_SX|MAS3_SW|MAS3_SR)@h
203 ori r11,r13,(MAS3_SX|MAS3_SW|MAS3_SR)@l
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204 mtspr SPRN_MAS3,r11
205 tlbwe
206
207 bl 1f
2081: mflr r11
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209 /*
210 * OR in 0xfff to create a mask of the bootpg SDRAM address. We use
211 * this mask to fixup the cpu spin table and the address that we want
212 * to jump to, eg change them from 0xfffffxxx to 0x7ffffxxx if the
213 * bootpg is at 0x7ffff000 in SDRAM.
214 */
215 ori r13,r13,0xfff
216 and r11, r11, r13
217 and r10, r10, r13
218
219 addi r11,r11,(2f-1b)
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220 mfmsr r13
221 ori r12,r13,MSR_IS|MSR_DS@l
222
223 mtspr SPRN_SRR0,r11
224 mtspr SPRN_SRR1,r12
225 rfi
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226
227 /* spin waiting for addr */
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2282:
229 lwz r4,ENTRY_ADDR_LOWER(r10)
ec2b74ff 230 andi. r11,r4,1
79679d80 231 bne 2b
cf6cc014 232 isync
79679d80 233
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234 /* setup IVORs to match fixed offsets */
235#include "fixed_ivor.S"
236
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237 /* get the upper bits of the addr */
238 lwz r11,ENTRY_ADDR_UPPER(r10)
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239
240 /* setup branch addr */
79679d80 241 mtspr SPRN_SRR0,r4
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242
243 /* mark the entry as released */
244 li r8,3
79679d80 245 stw r8,ENTRY_ADDR_LOWER(r10)
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246
247 /* mask by ~64M to setup our tlb we will jump to */
79679d80 248 rlwinm r12,r4,0,0,5
ec2b74ff 249
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250 /* setup r3, r4, r5, r6, r7, r8, r9 */
251 lwz r3,ENTRY_R3_LOWER(r10)
252 li r4,0
ec2b74ff 253 li r5,0
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254 lwz r6,ENTRY_R6_LOWER(r10)
255 lis r7,(64*1024*1024)@h
256 li r8,0
257 li r9,0
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258
259 /* load up the pir */
79679d80 260 lwz r0,ENTRY_PIR(r10)
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261 mtspr SPRN_PIR,r0
262 mfspr r0,SPRN_PIR
79679d80 263 stw r0,ENTRY_PIR(r10)
ec2b74ff 264
181a3650 265 mtspr IVPR,r12
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266/*
267 * Coming here, we know the cpu has one TLB mapping in TLB1[0]
268 * which maps 0xfffff000-0xffffffff one-to-one. We set up a
269 * second mapping that maps addr 1:1 for 64M, and then we jump to
270 * addr
271 */
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272 lis r10,(MAS0_TLBSEL(1)|MAS0_ESEL(0))@h
273 mtspr SPRN_MAS0,r10
274 lis r10,(MAS1_VALID|MAS1_IPROT)@h
275 ori r10,r10,(MAS1_TSIZE(BOOKE_PAGESZ_64M))@l
276 mtspr SPRN_MAS1,r10
ec2b74ff 277 /* WIMGE = 0b00000 for now */
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278 mtspr SPRN_MAS2,r12
279 ori r12,r12,(MAS3_SX|MAS3_SW|MAS3_SR)
280 mtspr SPRN_MAS3,r12
281#ifdef CONFIG_ENABLE_36BIT_PHYS
282 mtspr SPRN_MAS7,r11
283#endif
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284 tlbwe
285
286/* Now we have another mapping for this page, so we jump to that
287 * mapping
288 */
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289 mtspr SPRN_SRR1,r13
290 rfi
ec2b74ff 291
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292 /*
293 * Allocate some space for the SDRAM address of the bootpg.
294 * This variable has to be in the boot page so that it can
295 * be accessed by secondary cores when they come out of reset.
296 */
297 .globl __bootpg_addr
298__bootpg_addr:
299 .long 0
300
cf6cc014 301 .align L1_CACHE_SHIFT
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302 .globl __spin_table
303__spin_table:
0e870980 304 .space CONFIG_MAX_CPUS*ENTRY_SIZE
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305
306 /* Fill in the empty space. The actual reset vector is
307 * the last word of the page */
308__secondary_start_code_end:
309 .space 4092 - (__secondary_start_code_end - __secondary_start_page)
310__secondary_reset_vector:
311 b __secondary_start_page