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42d1f039 | 1 | /* |
69bcf5bc | 2 | * Copyright 2004, 2007-2010 Freescale Semiconductor, Inc. |
42d1f039 | 3 | * Copyright (C) 2003 Motorola,Inc. |
42d1f039 WD |
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> | |
561858ee | 33 | #include <timestamp.h> |
42d1f039 WD |
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 | |
61a21e98 | 49 | #define MSR_KERNEL ( MSR_ME ) /* Machine Check */ |
42d1f039 WD |
50 | |
51 | /* | |
52 | * Set up GOT: Global Offset Table | |
53 | * | |
0f8aa159 | 54 | * Use r12 to access the GOT |
42d1f039 WD |
55 | */ |
56 | START_GOT | |
57 | GOT_ENTRY(_GOT2_TABLE_) | |
58 | GOT_ENTRY(_FIXUP_TABLE_) | |
59 | ||
7da53351 | 60 | #ifndef CONFIG_NAND_SPL |
42d1f039 WD |
61 | GOT_ENTRY(_start) |
62 | GOT_ENTRY(_start_of_vectors) | |
63 | GOT_ENTRY(_end_of_vectors) | |
64 | GOT_ENTRY(transfer_to_handler) | |
7da53351 | 65 | #endif |
42d1f039 WD |
66 | |
67 | GOT_ENTRY(__init_end) | |
68 | GOT_ENTRY(_end) | |
69 | GOT_ENTRY(__bss_start) | |
70 | END_GOT | |
71 | ||
72 | /* | |
73 | * e500 Startup -- after reset only the last 4KB of the effective | |
74 | * address space is mapped in the MMU L2 TLB1 Entry0. The .bootpg | |
75 | * section is located at THIS LAST page and basically does three | |
76 | * things: clear some registers, set up exception tables and | |
77 | * add more TLB entries for 'larger spaces'(e.g. the boot rom) to | |
78 | * continue the boot procedure. | |
79 | ||
80 | * Once the boot rom is mapped by TLB entries we can proceed | |
81 | * with normal startup. | |
82 | * | |
83 | */ | |
84 | ||
61a21e98 AF |
85 | .section .bootpg,"ax" |
86 | .globl _start_e500 | |
42d1f039 WD |
87 | |
88 | _start_e500: | |
97d80fc3 | 89 | |
61a21e98 | 90 | /* clear registers/arrays not reset by hardware */ |
42d1f039 | 91 | |
61a21e98 AF |
92 | /* L1 */ |
93 | li r0,2 | |
94 | mtspr L1CSR0,r0 /* invalidate d-cache */ | |
53677ef1 | 95 | mtspr L1CSR1,r0 /* invalidate i-cache */ |
42d1f039 WD |
96 | |
97 | mfspr r1,DBSR | |
98 | mtspr DBSR,r1 /* Clear all valid bits */ | |
99 | ||
61a21e98 AF |
100 | /* |
101 | * Enable L1 Caches early | |
102 | * | |
103 | */ | |
42d1f039 | 104 | |
82fd1f8d KG |
105 | #if defined(CONFIG_E500MC) && defined(CONFIG_SYS_CACHE_STASHING) |
106 | /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */ | |
107 | li r2,(32 + 0) | |
108 | mtspr L1CSR2,r2 | |
109 | #endif | |
110 | ||
33f57bd5 KG |
111 | /* Enable/invalidate the I-Cache */ |
112 | lis r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h | |
113 | ori r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l | |
114 | mtspr SPRN_L1CSR1,r2 | |
115 | 1: | |
116 | mfspr r3,SPRN_L1CSR1 | |
117 | and. r1,r3,r2 | |
118 | bne 1b | |
119 | ||
120 | lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h | |
121 | ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l | |
122 | mtspr SPRN_L1CSR1,r3 | |
61a21e98 | 123 | isync |
33f57bd5 KG |
124 | 2: |
125 | mfspr r3,SPRN_L1CSR1 | |
126 | andi. r1,r3,L1CSR1_ICE@l | |
127 | beq 2b | |
128 | ||
129 | /* Enable/invalidate the D-Cache */ | |
130 | lis r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h | |
131 | ori r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l | |
132 | mtspr SPRN_L1CSR0,r2 | |
133 | 1: | |
134 | mfspr r3,SPRN_L1CSR0 | |
135 | and. r1,r3,r2 | |
136 | bne 1b | |
137 | ||
138 | lis r3,(L1CSR0_CPE|L1CSR0_DCE)@h | |
139 | ori r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l | |
140 | mtspr SPRN_L1CSR0,r3 | |
42d1f039 | 141 | isync |
33f57bd5 KG |
142 | 2: |
143 | mfspr r3,SPRN_L1CSR0 | |
144 | andi. r1,r3,L1CSR0_DCE@l | |
145 | beq 2b | |
42d1f039 WD |
146 | |
147 | /* Setup interrupt vectors */ | |
343117bf | 148 | lis r1,TEXT_BASE@h |
61a21e98 | 149 | mtspr IVPR,r1 |
42d1f039 | 150 | |
343117bf | 151 | li r1,0x0100 |
42d1f039 | 152 | mtspr IVOR0,r1 /* 0: Critical input */ |
343117bf | 153 | li r1,0x0200 |
42d1f039 | 154 | mtspr IVOR1,r1 /* 1: Machine check */ |
343117bf | 155 | li r1,0x0300 |
42d1f039 | 156 | mtspr IVOR2,r1 /* 2: Data storage */ |
343117bf | 157 | li r1,0x0400 |
42d1f039 WD |
158 | mtspr IVOR3,r1 /* 3: Instruction storage */ |
159 | li r1,0x0500 | |
160 | mtspr IVOR4,r1 /* 4: External interrupt */ | |
161 | li r1,0x0600 | |
162 | mtspr IVOR5,r1 /* 5: Alignment */ | |
163 | li r1,0x0700 | |
164 | mtspr IVOR6,r1 /* 6: Program check */ | |
165 | li r1,0x0800 | |
166 | mtspr IVOR7,r1 /* 7: floating point unavailable */ | |
343117bf | 167 | li r1,0x0900 |
42d1f039 WD |
168 | mtspr IVOR8,r1 /* 8: System call */ |
169 | /* 9: Auxiliary processor unavailable(unsupported) */ | |
343117bf | 170 | li r1,0x0a00 |
42d1f039 | 171 | mtspr IVOR10,r1 /* 10: Decrementer */ |
343117bf WD |
172 | li r1,0x0b00 |
173 | mtspr IVOR11,r1 /* 11: Interval timer */ | |
174 | li r1,0x0c00 | |
3e0bc447 WD |
175 | mtspr IVOR12,r1 /* 12: Watchdog timer */ |
176 | li r1,0x0d00 | |
42d1f039 | 177 | mtspr IVOR13,r1 /* 13: Data TLB error */ |
343117bf | 178 | li r1,0x0e00 |
42d1f039 | 179 | mtspr IVOR14,r1 /* 14: Instruction TLB error */ |
343117bf | 180 | li r1,0x0f00 |
42d1f039 WD |
181 | mtspr IVOR15,r1 /* 15: Debug */ |
182 | ||
42d1f039 | 183 | /* Clear and set up some registers. */ |
87163180 | 184 | li r0,0x0000 |
42d1f039 WD |
185 | lis r1,0xffff |
186 | mtspr DEC,r0 /* prevent dec exceptions */ | |
187 | mttbl r0 /* prevent fit & wdt exceptions */ | |
188 | mttbu r0 | |
189 | mtspr TSR,r1 /* clear all timer exception status */ | |
190 | mtspr TCR,r0 /* disable all */ | |
191 | mtspr ESR,r0 /* clear exception syndrome register */ | |
192 | mtspr MCSR,r0 /* machine check syndrome register */ | |
193 | mtxer r0 /* clear integer exception register */ | |
42d1f039 | 194 | |
dcc87dd5 SW |
195 | #ifdef CONFIG_SYS_BOOK3E_HV |
196 | mtspr MAS8,r0 /* make sure MAS8 is clear */ | |
197 | #endif | |
198 | ||
42d1f039 | 199 | /* Enable Time Base and Select Time Base Clock */ |
0ac6f8b7 | 200 | lis r0,HID0_EMCP@h /* Enable machine check */ |
d9b94f28 | 201 | #if defined(CONFIG_ENABLE_36BIT_PHYS) |
87163180 | 202 | ori r0,r0,HID0_ENMAS7@l /* Enable MAS7 */ |
d9b94f28 | 203 | #endif |
1b3e4044 | 204 | #ifndef CONFIG_E500MC |
87163180 | 205 | ori r0,r0,HID0_TBEN@l /* Enable Timebase */ |
1b3e4044 | 206 | #endif |
42d1f039 | 207 | mtspr HID0,r0 |
42d1f039 | 208 | |
0f060c3b | 209 | #ifndef CONFIG_E500MC |
61a21e98 | 210 | li r0,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */ |
ff8473e9 SG |
211 | mfspr r3,PVR |
212 | andi. r3,r3, 0xff | |
213 | cmpwi r3,0x50@l /* if we are rev 5.0 or greater set MBDD */ | |
214 | blt 1f | |
215 | /* Set MBDD bit also */ | |
216 | ori r0, r0, HID1_MBDD@l | |
217 | 1: | |
42d1f039 | 218 | mtspr HID1,r0 |
0f060c3b | 219 | #endif |
42d1f039 WD |
220 | |
221 | /* Enable Branch Prediction */ | |
222 | #if defined(CONFIG_BTB) | |
69bcf5bc KG |
223 | lis r0,BUCSR_ENABLE@h |
224 | ori r0,r0,BUCSR_ENABLE@l | |
225 | mtspr SPRN_BUCSR,r0 | |
42d1f039 WD |
226 | #endif |
227 | ||
6d0f6bcf | 228 | #if defined(CONFIG_SYS_INIT_DBCR) |
42d1f039 WD |
229 | lis r1,0xffff |
230 | ori r1,r1,0xffff | |
0ac6f8b7 | 231 | mtspr DBSR,r1 /* Clear all status bits */ |
6d0f6bcf JCPV |
232 | lis r0,CONFIG_SYS_INIT_DBCR@h /* DBCR0[IDM] must be set */ |
233 | ori r0,r0,CONFIG_SYS_INIT_DBCR@l | |
0ac6f8b7 | 234 | mtspr DBCR0,r0 |
42d1f039 WD |
235 | #endif |
236 | ||
22b6dbc1 HW |
237 | #ifdef CONFIG_MPC8569 |
238 | #define CONFIG_SYS_LBC_ADDR (CONFIG_SYS_CCSRBAR_DEFAULT + 0x5000) | |
239 | #define CONFIG_SYS_LBCR_ADDR (CONFIG_SYS_LBC_ADDR + 0xd0) | |
240 | ||
241 | /* MPC8569 Rev.0 silcon needs to set bit 13 of LBCR to allow elBC to | |
242 | * use address space which is more than 12bits, and it must be done in | |
243 | * the 4K boot page. So we set this bit here. | |
244 | */ | |
245 | ||
246 | /* create a temp mapping TLB0[0] for LBCR */ | |
247 | lis r6,FSL_BOOKE_MAS0(0, 0, 0)@h | |
248 | ori r6,r6,FSL_BOOKE_MAS0(0, 0, 0)@l | |
249 | ||
250 | lis r7,FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@h | |
251 | ori r7,r7,FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@l | |
252 | ||
253 | lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G)@h | |
254 | ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G)@l | |
255 | ||
256 | lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_LBC_ADDR, 0, | |
257 | (MAS3_SX|MAS3_SW|MAS3_SR))@h | |
258 | ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_LBC_ADDR, 0, | |
259 | (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
260 | ||
261 | mtspr MAS0,r6 | |
262 | mtspr MAS1,r7 | |
263 | mtspr MAS2,r8 | |
264 | mtspr MAS3,r9 | |
265 | isync | |
266 | msync | |
267 | tlbwe | |
268 | ||
269 | /* Set LBCR register */ | |
270 | lis r4,CONFIG_SYS_LBCR_ADDR@h | |
271 | ori r4,r4,CONFIG_SYS_LBCR_ADDR@l | |
272 | ||
273 | lis r5,CONFIG_SYS_LBC_LBCR@h | |
274 | ori r5,r5,CONFIG_SYS_LBC_LBCR@l | |
275 | stw r5,0(r4) | |
276 | isync | |
277 | ||
278 | /* invalidate this temp TLB */ | |
279 | lis r4,CONFIG_SYS_LBC_ADDR@h | |
280 | ori r4,r4,CONFIG_SYS_LBC_ADDR@l | |
281 | tlbivax 0,r4 | |
282 | isync | |
283 | ||
284 | #endif /* CONFIG_MPC8569 */ | |
285 | ||
87163180 KG |
286 | lis r6,FSL_BOOKE_MAS0(1, 15, 0)@h |
287 | ori r6,r6,FSL_BOOKE_MAS0(1, 15, 0)@l | |
288 | ||
7da53351 MH |
289 | #ifndef CONFIG_SYS_RAMBOOT |
290 | /* create a temp mapping in AS=1 to the 4M boot window */ | |
f51f07eb DL |
291 | lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@h |
292 | ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@l | |
87163180 | 293 | |
f51f07eb DL |
294 | lis r8,FSL_BOOKE_MAS2(TEXT_BASE & 0xffc00000, (MAS2_I|MAS2_G))@h |
295 | ori r8,r8,FSL_BOOKE_MAS2(TEXT_BASE & 0xffc00000, (MAS2_I|MAS2_G))@l | |
87163180 | 296 | |
f51f07eb DL |
297 | /* The 85xx has the default boot window 0xff800000 - 0xffffffff */ |
298 | lis r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h | |
299 | ori r9,r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
7da53351 MH |
300 | #else |
301 | /* | |
302 | * create a temp mapping in AS=1 to the 1M TEXT_BASE space, the main | |
303 | * image has been relocated to TEXT_BASE on the second stage. | |
304 | */ | |
305 | lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@h | |
306 | ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@l | |
307 | ||
308 | lis r8,FSL_BOOKE_MAS2(TEXT_BASE, (MAS2_I|MAS2_G))@h | |
309 | ori r8,r8,FSL_BOOKE_MAS2(TEXT_BASE, (MAS2_I|MAS2_G))@l | |
310 | ||
311 | lis r9,FSL_BOOKE_MAS3(TEXT_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h | |
312 | ori r9,r9,FSL_BOOKE_MAS3(TEXT_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
313 | #endif | |
87163180 KG |
314 | |
315 | mtspr MAS0,r6 | |
316 | mtspr MAS1,r7 | |
317 | mtspr MAS2,r8 | |
318 | mtspr MAS3,r9 | |
319 | isync | |
320 | msync | |
321 | tlbwe | |
322 | ||
323 | /* create a temp mapping in AS=1 to the stack */ | |
324 | lis r6,FSL_BOOKE_MAS0(1, 14, 0)@h | |
325 | ori r6,r6,FSL_BOOKE_MAS0(1, 14, 0)@l | |
326 | ||
327 | lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@h | |
328 | ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@l | |
329 | ||
6d0f6bcf JCPV |
330 | lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@h |
331 | ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@l | |
87163180 | 332 | |
6d0f6bcf JCPV |
333 | lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h |
334 | ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
87163180 KG |
335 | |
336 | mtspr MAS0,r6 | |
337 | mtspr MAS1,r7 | |
338 | mtspr MAS2,r8 | |
339 | mtspr MAS3,r9 | |
340 | isync | |
341 | msync | |
342 | tlbwe | |
343 | ||
1b72dbec SW |
344 | lis r6,MSR_IS|MSR_DS@h |
345 | ori r6,r6,MSR_IS|MSR_DS@l | |
87163180 KG |
346 | lis r7,switch_as@h |
347 | ori r7,r7,switch_as@l | |
348 | ||
349 | mtspr SPRN_SRR0,r7 | |
350 | mtspr SPRN_SRR1,r6 | |
351 | rfi | |
352 | ||
353 | switch_as: | |
3db0bef5 KG |
354 | /* L1 DCache is used for initial RAM */ |
355 | ||
356 | /* Allocate Initial RAM in data cache. | |
357 | */ | |
6d0f6bcf JCPV |
358 | lis r3,CONFIG_SYS_INIT_RAM_ADDR@h |
359 | ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l | |
b009f3ec KG |
360 | mfspr r2, L1CFG0 |
361 | andi. r2, r2, 0x1ff | |
362 | /* cache size * 1024 / (2 * L1 line size) */ | |
363 | slwi r2, r2, (10 - 1 - L1_CACHE_SHIFT) | |
3db0bef5 KG |
364 | mtctr r2 |
365 | li r0,0 | |
366 | 1: | |
367 | dcbz r0,r3 | |
368 | dcbtls 0,r0,r3 | |
6d0f6bcf | 369 | addi r3,r3,CONFIG_SYS_CACHELINE_SIZE |
3db0bef5 KG |
370 | bdnz 1b |
371 | ||
61a21e98 | 372 | /* Jump out the last 4K page and continue to 'normal' start */ |
6d0f6bcf | 373 | #ifdef CONFIG_SYS_RAMBOOT |
61a21e98 | 374 | b _start_cont |
3db0bef5 KG |
375 | #else |
376 | /* Calculate absolute address in FLASH and jump there */ | |
377 | /*--------------------------------------------------------------*/ | |
6d0f6bcf JCPV |
378 | lis r3,CONFIG_SYS_MONITOR_BASE@h |
379 | ori r3,r3,CONFIG_SYS_MONITOR_BASE@l | |
3db0bef5 KG |
380 | addi r3,r3,_start_cont - _start + _START_OFFSET |
381 | mtlr r3 | |
1e701e70 | 382 | blr |
3db0bef5 | 383 | #endif |
61a21e98 | 384 | |
61a21e98 AF |
385 | .text |
386 | .globl _start | |
387 | _start: | |
388 | .long 0x27051956 /* U-BOOT Magic Number */ | |
389 | .globl version_string | |
390 | version_string: | |
391 | .ascii U_BOOT_VERSION | |
561858ee | 392 | .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")" |
61a21e98 AF |
393 | .ascii CONFIG_IDENT_STRING, "\0" |
394 | ||
395 | .align 4 | |
396 | .globl _start_cont | |
397 | _start_cont: | |
42d1f039 | 398 | /* Setup the stack in initial RAM,could be L2-as-SRAM or L1 dcache*/ |
6d0f6bcf JCPV |
399 | lis r1,CONFIG_SYS_INIT_RAM_ADDR@h |
400 | ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l | |
42d1f039 WD |
401 | |
402 | li r0,0 | |
403 | stwu r0,-4(r1) | |
404 | stwu r0,-4(r1) /* Terminate call chain */ | |
405 | ||
406 | stwu r1,-8(r1) /* Save back chain and move SP */ | |
407 | lis r0,RESET_VECTOR@h /* Address of reset vector */ | |
61a21e98 | 408 | ori r0,r0,RESET_VECTOR@l |
42d1f039 WD |
409 | stwu r1,-8(r1) /* Save back chain and move SP */ |
410 | stw r0,+12(r1) /* Save return addr (underflow vect) */ | |
411 | ||
412 | GET_GOT | |
87163180 KG |
413 | bl cpu_init_early_f |
414 | ||
415 | /* switch back to AS = 0 */ | |
416 | lis r3,(MSR_CE|MSR_ME|MSR_DE)@h | |
417 | ori r3,r3,(MSR_CE|MSR_ME|MSR_DE)@l | |
418 | mtmsr r3 | |
419 | isync | |
420 | ||
42d1f039 | 421 | bl cpu_init_f |
42d1f039 | 422 | bl board_init_f |
0ac6f8b7 | 423 | isync |
42d1f039 | 424 | |
7da53351 | 425 | #ifndef CONFIG_NAND_SPL |
61a21e98 | 426 | . = EXC_OFF_SYS_RESET |
42d1f039 WD |
427 | .globl _start_of_vectors |
428 | _start_of_vectors: | |
61a21e98 | 429 | |
42d1f039 | 430 | /* Critical input. */ |
61a21e98 AF |
431 | CRIT_EXCEPTION(0x0100, CriticalInput, CritcalInputException) |
432 | ||
433 | /* Machine check */ | |
434 | MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException) | |
42d1f039 WD |
435 | |
436 | /* Data Storage exception. */ | |
437 | STD_EXCEPTION(0x0300, DataStorage, UnknownException) | |
438 | ||
439 | /* Instruction Storage exception. */ | |
440 | STD_EXCEPTION(0x0400, InstStorage, UnknownException) | |
441 | ||
442 | /* External Interrupt exception. */ | |
61a21e98 | 443 | STD_EXCEPTION(0x0500, ExtInterrupt, ExtIntException) |
42d1f039 WD |
444 | |
445 | /* Alignment exception. */ | |
446 | . = 0x0600 | |
447 | Alignment: | |
02032e8f | 448 | EXCEPTION_PROLOG(SRR0, SRR1) |
42d1f039 WD |
449 | mfspr r4,DAR |
450 | stw r4,_DAR(r21) | |
451 | mfspr r5,DSISR | |
452 | stw r5,_DSISR(r21) | |
453 | addi r3,r1,STACK_FRAME_OVERHEAD | |
fc4e1887 | 454 | EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE) |
42d1f039 WD |
455 | |
456 | /* Program check exception */ | |
457 | . = 0x0700 | |
458 | ProgramCheck: | |
02032e8f | 459 | EXCEPTION_PROLOG(SRR0, SRR1) |
42d1f039 | 460 | addi r3,r1,STACK_FRAME_OVERHEAD |
fc4e1887 JT |
461 | EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException, |
462 | MSR_KERNEL, COPY_EE) | |
42d1f039 WD |
463 | |
464 | /* No FPU on MPC85xx. This exception is not supposed to happen. | |
465 | */ | |
466 | STD_EXCEPTION(0x0800, FPUnavailable, UnknownException) | |
42d1f039 | 467 | |
343117bf | 468 | . = 0x0900 |
42d1f039 WD |
469 | /* |
470 | * r0 - SYSCALL number | |
471 | * r3-... arguments | |
472 | */ | |
473 | SystemCall: | |
61a21e98 AF |
474 | addis r11,r0,0 /* get functions table addr */ |
475 | ori r11,r11,0 /* Note: this code is patched in trap_init */ | |
476 | addis r12,r0,0 /* get number of functions */ | |
343117bf WD |
477 | ori r12,r12,0 |
478 | ||
61a21e98 | 479 | cmplw 0,r0,r12 |
343117bf WD |
480 | bge 1f |
481 | ||
61a21e98 | 482 | rlwinm r0,r0,2,0,31 /* fn_addr = fn_tbl[r0] */ |
343117bf WD |
483 | add r11,r11,r0 |
484 | lwz r11,0(r11) | |
485 | ||
61a21e98 | 486 | li r20,0xd00-4 /* Get stack pointer */ |
343117bf | 487 | lwz r12,0(r20) |
61a21e98 | 488 | subi r12,r12,12 /* Adjust stack pointer */ |
343117bf | 489 | li r0,0xc00+_end_back-SystemCall |
61a21e98 | 490 | cmplw 0,r0,r12 /* Check stack overflow */ |
343117bf WD |
491 | bgt 1f |
492 | stw r12,0(r20) | |
493 | ||
494 | mflr r0 | |
495 | stw r0,0(r12) | |
496 | mfspr r0,SRR0 | |
497 | stw r0,4(r12) | |
498 | mfspr r0,SRR1 | |
499 | stw r0,8(r12) | |
500 | ||
501 | li r12,0xc00+_back-SystemCall | |
502 | mtlr r12 | |
503 | mtspr SRR0,r11 | |
504 | ||
505 | 1: SYNC | |
42d1f039 WD |
506 | rfi |
507 | _back: | |
508 | ||
343117bf WD |
509 | mfmsr r11 /* Disable interrupts */ |
510 | li r12,0 | |
511 | ori r12,r12,MSR_EE | |
512 | andc r11,r11,r12 | |
513 | SYNC /* Some chip revs need this... */ | |
514 | mtmsr r11 | |
42d1f039 WD |
515 | SYNC |
516 | ||
343117bf WD |
517 | li r12,0xd00-4 /* restore regs */ |
518 | lwz r12,0(r12) | |
42d1f039 | 519 | |
343117bf WD |
520 | lwz r11,0(r12) |
521 | mtlr r11 | |
522 | lwz r11,4(r12) | |
523 | mtspr SRR0,r11 | |
524 | lwz r11,8(r12) | |
525 | mtspr SRR1,r11 | |
42d1f039 | 526 | |
343117bf WD |
527 | addi r12,r12,12 /* Adjust stack pointer */ |
528 | li r20,0xd00-4 | |
529 | stw r12,0(r20) | |
42d1f039 WD |
530 | |
531 | SYNC | |
532 | rfi | |
533 | _end_back: | |
534 | ||
343117bf WD |
535 | STD_EXCEPTION(0x0a00, Decrementer, timer_interrupt) |
536 | STD_EXCEPTION(0x0b00, IntervalTimer, UnknownException) | |
537 | STD_EXCEPTION(0x0c00, WatchdogTimer, UnknownException) | |
42d1f039 | 538 | |
343117bf WD |
539 | STD_EXCEPTION(0x0d00, DataTLBError, UnknownException) |
540 | STD_EXCEPTION(0x0e00, InstructionTLBError, UnknownException) | |
42d1f039 | 541 | |
343117bf | 542 | CRIT_EXCEPTION(0x0f00, DebugBreakpoint, DebugException ) |
42d1f039 | 543 | |
343117bf | 544 | .globl _end_of_vectors |
42d1f039 WD |
545 | _end_of_vectors: |
546 | ||
547 | ||
61a21e98 | 548 | . = . + (0x100 - ( . & 0xff )) /* align for debug */ |
42d1f039 WD |
549 | |
550 | /* | |
551 | * This code finishes saving the registers to the exception frame | |
552 | * and jumps to the appropriate handler for the exception. | |
553 | * Register r21 is pointer into trap frame, r1 has new stack pointer. | |
554 | */ | |
555 | .globl transfer_to_handler | |
556 | transfer_to_handler: | |
557 | stw r22,_NIP(r21) | |
558 | lis r22,MSR_POW@h | |
559 | andc r23,r23,r22 | |
560 | stw r23,_MSR(r21) | |
561 | SAVE_GPR(7, r21) | |
562 | SAVE_4GPRS(8, r21) | |
563 | SAVE_8GPRS(12, r21) | |
564 | SAVE_8GPRS(24, r21) | |
565 | ||
566 | mflr r23 | |
567 | andi. r24,r23,0x3f00 /* get vector offset */ | |
568 | stw r24,TRAP(r21) | |
569 | li r22,0 | |
570 | stw r22,RESULT(r21) | |
571 | mtspr SPRG2,r22 /* r1 is now kernel sp */ | |
572 | ||
573 | lwz r24,0(r23) /* virtual address of handler */ | |
574 | lwz r23,4(r23) /* where to go when done */ | |
575 | mtspr SRR0,r24 | |
576 | mtspr SRR1,r20 | |
577 | mtlr r23 | |
578 | SYNC | |
579 | rfi /* jump to handler, enable MMU */ | |
580 | ||
581 | int_return: | |
582 | mfmsr r28 /* Disable interrupts */ | |
583 | li r4,0 | |
584 | ori r4,r4,MSR_EE | |
585 | andc r28,r28,r4 | |
586 | SYNC /* Some chip revs need this... */ | |
587 | mtmsr r28 | |
588 | SYNC | |
589 | lwz r2,_CTR(r1) | |
590 | lwz r0,_LINK(r1) | |
591 | mtctr r2 | |
592 | mtlr r0 | |
593 | lwz r2,_XER(r1) | |
594 | lwz r0,_CCR(r1) | |
595 | mtspr XER,r2 | |
596 | mtcrf 0xFF,r0 | |
597 | REST_10GPRS(3, r1) | |
598 | REST_10GPRS(13, r1) | |
599 | REST_8GPRS(23, r1) | |
600 | REST_GPR(31, r1) | |
601 | lwz r2,_NIP(r1) /* Restore environment */ | |
602 | lwz r0,_MSR(r1) | |
603 | mtspr SRR0,r2 | |
604 | mtspr SRR1,r0 | |
605 | lwz r0,GPR0(r1) | |
606 | lwz r2,GPR2(r1) | |
607 | lwz r1,GPR1(r1) | |
608 | SYNC | |
609 | rfi | |
610 | ||
611 | crit_return: | |
612 | mfmsr r28 /* Disable interrupts */ | |
613 | li r4,0 | |
614 | ori r4,r4,MSR_EE | |
615 | andc r28,r28,r4 | |
616 | SYNC /* Some chip revs need this... */ | |
617 | mtmsr r28 | |
618 | SYNC | |
619 | lwz r2,_CTR(r1) | |
620 | lwz r0,_LINK(r1) | |
621 | mtctr r2 | |
622 | mtlr r0 | |
623 | lwz r2,_XER(r1) | |
624 | lwz r0,_CCR(r1) | |
625 | mtspr XER,r2 | |
626 | mtcrf 0xFF,r0 | |
627 | REST_10GPRS(3, r1) | |
628 | REST_10GPRS(13, r1) | |
629 | REST_8GPRS(23, r1) | |
630 | REST_GPR(31, r1) | |
631 | lwz r2,_NIP(r1) /* Restore environment */ | |
632 | lwz r0,_MSR(r1) | |
61a21e98 AF |
633 | mtspr SPRN_CSRR0,r2 |
634 | mtspr SPRN_CSRR1,r0 | |
42d1f039 WD |
635 | lwz r0,GPR0(r1) |
636 | lwz r2,GPR2(r1) | |
637 | lwz r1,GPR1(r1) | |
638 | SYNC | |
639 | rfci | |
640 | ||
61a21e98 AF |
641 | mck_return: |
642 | mfmsr r28 /* Disable interrupts */ | |
643 | li r4,0 | |
644 | ori r4,r4,MSR_EE | |
645 | andc r28,r28,r4 | |
646 | SYNC /* Some chip revs need this... */ | |
647 | mtmsr r28 | |
648 | SYNC | |
649 | lwz r2,_CTR(r1) | |
650 | lwz r0,_LINK(r1) | |
651 | mtctr r2 | |
652 | mtlr r0 | |
653 | lwz r2,_XER(r1) | |
654 | lwz r0,_CCR(r1) | |
655 | mtspr XER,r2 | |
656 | mtcrf 0xFF,r0 | |
657 | REST_10GPRS(3, r1) | |
658 | REST_10GPRS(13, r1) | |
659 | REST_8GPRS(23, r1) | |
660 | REST_GPR(31, r1) | |
661 | lwz r2,_NIP(r1) /* Restore environment */ | |
662 | lwz r0,_MSR(r1) | |
663 | mtspr SPRN_MCSRR0,r2 | |
664 | mtspr SPRN_MCSRR1,r0 | |
665 | lwz r0,GPR0(r1) | |
666 | lwz r2,GPR2(r1) | |
667 | lwz r1,GPR1(r1) | |
668 | SYNC | |
669 | rfmci | |
670 | ||
42d1f039 WD |
671 | /* Cache functions. |
672 | */ | |
54e091d3 | 673 | .globl invalidate_icache |
42d1f039 WD |
674 | invalidate_icache: |
675 | mfspr r0,L1CSR1 | |
61a21e98 AF |
676 | ori r0,r0,L1CSR1_ICFI |
677 | msync | |
678 | isync | |
42d1f039 WD |
679 | mtspr L1CSR1,r0 |
680 | isync | |
61a21e98 | 681 | blr /* entire I cache */ |
42d1f039 | 682 | |
54e091d3 | 683 | .globl invalidate_dcache |
42d1f039 WD |
684 | invalidate_dcache: |
685 | mfspr r0,L1CSR0 | |
61a21e98 | 686 | ori r0,r0,L1CSR0_DCFI |
42d1f039 WD |
687 | msync |
688 | isync | |
689 | mtspr L1CSR0,r0 | |
690 | isync | |
691 | blr | |
692 | ||
693 | .globl icache_enable | |
694 | icache_enable: | |
695 | mflr r8 | |
696 | bl invalidate_icache | |
697 | mtlr r8 | |
698 | isync | |
699 | mfspr r4,L1CSR1 | |
700 | ori r4,r4,0x0001 | |
701 | oris r4,r4,0x0001 | |
702 | mtspr L1CSR1,r4 | |
703 | isync | |
704 | blr | |
705 | ||
706 | .globl icache_disable | |
707 | icache_disable: | |
708 | mfspr r0,L1CSR1 | |
61a21e98 AF |
709 | lis r3,0 |
710 | ori r3,r3,L1CSR1_ICE | |
711 | andc r0,r0,r3 | |
42d1f039 WD |
712 | mtspr L1CSR1,r0 |
713 | isync | |
714 | blr | |
715 | ||
716 | .globl icache_status | |
717 | icache_status: | |
718 | mfspr r3,L1CSR1 | |
61a21e98 | 719 | andi. r3,r3,L1CSR1_ICE |
42d1f039 WD |
720 | blr |
721 | ||
722 | .globl dcache_enable | |
723 | dcache_enable: | |
724 | mflr r8 | |
725 | bl invalidate_dcache | |
726 | mtlr r8 | |
727 | isync | |
728 | mfspr r0,L1CSR0 | |
729 | ori r0,r0,0x0001 | |
730 | oris r0,r0,0x0001 | |
731 | msync | |
732 | isync | |
733 | mtspr L1CSR0,r0 | |
734 | isync | |
735 | blr | |
736 | ||
737 | .globl dcache_disable | |
738 | dcache_disable: | |
61a21e98 AF |
739 | mfspr r3,L1CSR0 |
740 | lis r4,0 | |
741 | ori r4,r4,L1CSR0_DCE | |
742 | andc r3,r3,r4 | |
42d1f039 WD |
743 | mtspr L1CSR0,r0 |
744 | isync | |
745 | blr | |
746 | ||
747 | .globl dcache_status | |
748 | dcache_status: | |
749 | mfspr r3,L1CSR0 | |
61a21e98 | 750 | andi. r3,r3,L1CSR0_DCE |
42d1f039 WD |
751 | blr |
752 | ||
753 | .globl get_pir | |
754 | get_pir: | |
61a21e98 | 755 | mfspr r3,PIR |
42d1f039 WD |
756 | blr |
757 | ||
758 | .globl get_pvr | |
759 | get_pvr: | |
61a21e98 | 760 | mfspr r3,PVR |
42d1f039 WD |
761 | blr |
762 | ||
97d80fc3 WD |
763 | .globl get_svr |
764 | get_svr: | |
61a21e98 | 765 | mfspr r3,SVR |
97d80fc3 WD |
766 | blr |
767 | ||
42d1f039 WD |
768 | .globl wr_tcr |
769 | wr_tcr: | |
61a21e98 | 770 | mtspr TCR,r3 |
42d1f039 WD |
771 | blr |
772 | ||
773 | /*------------------------------------------------------------------------------- */ | |
774 | /* Function: in8 */ | |
775 | /* Description: Input 8 bits */ | |
776 | /*------------------------------------------------------------------------------- */ | |
777 | .globl in8 | |
778 | in8: | |
779 | lbz r3,0x0000(r3) | |
780 | blr | |
781 | ||
782 | /*------------------------------------------------------------------------------- */ | |
783 | /* Function: out8 */ | |
784 | /* Description: Output 8 bits */ | |
785 | /*------------------------------------------------------------------------------- */ | |
786 | .globl out8 | |
787 | out8: | |
788 | stb r4,0x0000(r3) | |
1487adbd | 789 | sync |
42d1f039 WD |
790 | blr |
791 | ||
792 | /*------------------------------------------------------------------------------- */ | |
793 | /* Function: out16 */ | |
794 | /* Description: Output 16 bits */ | |
795 | /*------------------------------------------------------------------------------- */ | |
796 | .globl out16 | |
797 | out16: | |
798 | sth r4,0x0000(r3) | |
1487adbd | 799 | sync |
42d1f039 WD |
800 | blr |
801 | ||
802 | /*------------------------------------------------------------------------------- */ | |
803 | /* Function: out16r */ | |
804 | /* Description: Byte reverse and output 16 bits */ | |
805 | /*------------------------------------------------------------------------------- */ | |
806 | .globl out16r | |
807 | out16r: | |
808 | sthbrx r4,r0,r3 | |
1487adbd | 809 | sync |
42d1f039 WD |
810 | blr |
811 | ||
812 | /*------------------------------------------------------------------------------- */ | |
813 | /* Function: out32 */ | |
814 | /* Description: Output 32 bits */ | |
815 | /*------------------------------------------------------------------------------- */ | |
816 | .globl out32 | |
817 | out32: | |
818 | stw r4,0x0000(r3) | |
1487adbd | 819 | sync |
42d1f039 WD |
820 | blr |
821 | ||
822 | /*------------------------------------------------------------------------------- */ | |
823 | /* Function: out32r */ | |
824 | /* Description: Byte reverse and output 32 bits */ | |
825 | /*------------------------------------------------------------------------------- */ | |
826 | .globl out32r | |
827 | out32r: | |
828 | stwbrx r4,r0,r3 | |
1487adbd | 829 | sync |
42d1f039 WD |
830 | blr |
831 | ||
832 | /*------------------------------------------------------------------------------- */ | |
833 | /* Function: in16 */ | |
834 | /* Description: Input 16 bits */ | |
835 | /*------------------------------------------------------------------------------- */ | |
836 | .globl in16 | |
837 | in16: | |
838 | lhz r3,0x0000(r3) | |
839 | blr | |
840 | ||
841 | /*------------------------------------------------------------------------------- */ | |
842 | /* Function: in16r */ | |
843 | /* Description: Input 16 bits and byte reverse */ | |
844 | /*------------------------------------------------------------------------------- */ | |
845 | .globl in16r | |
846 | in16r: | |
847 | lhbrx r3,r0,r3 | |
848 | blr | |
849 | ||
850 | /*------------------------------------------------------------------------------- */ | |
851 | /* Function: in32 */ | |
852 | /* Description: Input 32 bits */ | |
853 | /*------------------------------------------------------------------------------- */ | |
854 | .globl in32 | |
855 | in32: | |
856 | lwz 3,0x0000(3) | |
857 | blr | |
858 | ||
859 | /*------------------------------------------------------------------------------- */ | |
860 | /* Function: in32r */ | |
861 | /* Description: Input 32 bits and byte reverse */ | |
862 | /*------------------------------------------------------------------------------- */ | |
863 | .globl in32r | |
864 | in32r: | |
865 | lwbrx r3,r0,r3 | |
866 | blr | |
7da53351 | 867 | #endif /* !CONFIG_NAND_SPL */ |
42d1f039 | 868 | |
42d1f039 WD |
869 | /*------------------------------------------------------------------------------*/ |
870 | ||
d30f9043 KG |
871 | /* |
872 | * void write_tlb(mas0, mas1, mas2, mas3, mas7) | |
873 | */ | |
874 | .globl write_tlb | |
875 | write_tlb: | |
876 | mtspr MAS0,r3 | |
877 | mtspr MAS1,r4 | |
878 | mtspr MAS2,r5 | |
879 | mtspr MAS3,r6 | |
880 | #ifdef CONFIG_ENABLE_36BIT_PHYS | |
881 | mtspr MAS7,r7 | |
882 | #endif | |
883 | li r3,0 | |
884 | #ifdef CONFIG_SYS_BOOK3E_HV | |
885 | mtspr MAS8,r3 | |
886 | #endif | |
887 | isync | |
888 | tlbwe | |
889 | msync | |
890 | isync | |
891 | blr | |
892 | ||
42d1f039 WD |
893 | /* |
894 | * void relocate_code (addr_sp, gd, addr_moni) | |
895 | * | |
896 | * This "function" does not return, instead it continues in RAM | |
897 | * after relocating the monitor code. | |
898 | * | |
899 | * r3 = dest | |
900 | * r4 = src | |
901 | * r5 = length in bytes | |
902 | * r6 = cachelinesize | |
903 | */ | |
904 | .globl relocate_code | |
905 | relocate_code: | |
61a21e98 AF |
906 | mr r1,r3 /* Set new stack pointer */ |
907 | mr r9,r4 /* Save copy of Init Data pointer */ | |
908 | mr r10,r5 /* Save copy of Destination Address */ | |
42d1f039 | 909 | |
0f8aa159 | 910 | GET_GOT |
61a21e98 | 911 | mr r3,r5 /* Destination Address */ |
6d0f6bcf JCPV |
912 | lis r4,CONFIG_SYS_MONITOR_BASE@h /* Source Address */ |
913 | ori r4,r4,CONFIG_SYS_MONITOR_BASE@l | |
42d1f039 WD |
914 | lwz r5,GOT(__init_end) |
915 | sub r5,r5,r4 | |
6d0f6bcf | 916 | li r6,CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */ |
42d1f039 WD |
917 | |
918 | /* | |
919 | * Fix GOT pointer: | |
920 | * | |
6d0f6bcf | 921 | * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address |
42d1f039 WD |
922 | * |
923 | * Offset: | |
924 | */ | |
61a21e98 | 925 | sub r15,r10,r4 |
42d1f039 WD |
926 | |
927 | /* First our own GOT */ | |
0f8aa159 | 928 | add r12,r12,r15 |
42d1f039 | 929 | /* the the one used by the C code */ |
61a21e98 | 930 | add r30,r30,r15 |
42d1f039 WD |
931 | |
932 | /* | |
933 | * Now relocate code | |
934 | */ | |
935 | ||
936 | cmplw cr1,r3,r4 | |
937 | addi r0,r5,3 | |
938 | srwi. r0,r0,2 | |
939 | beq cr1,4f /* In place copy is not necessary */ | |
940 | beq 7f /* Protect against 0 count */ | |
941 | mtctr r0 | |
942 | bge cr1,2f | |
943 | ||
944 | la r8,-4(r4) | |
945 | la r7,-4(r3) | |
946 | 1: lwzu r0,4(r8) | |
947 | stwu r0,4(r7) | |
948 | bdnz 1b | |
949 | b 4f | |
950 | ||
951 | 2: slwi r0,r0,2 | |
952 | add r8,r4,r0 | |
953 | add r7,r3,r0 | |
954 | 3: lwzu r0,-4(r8) | |
955 | stwu r0,-4(r7) | |
956 | bdnz 3b | |
957 | ||
958 | /* | |
959 | * Now flush the cache: note that we must start from a cache aligned | |
960 | * address. Otherwise we might miss one cache line. | |
961 | */ | |
962 | 4: cmpwi r6,0 | |
963 | add r5,r3,r5 | |
964 | beq 7f /* Always flush prefetch queue in any case */ | |
965 | subi r0,r6,1 | |
966 | andc r3,r3,r0 | |
967 | mr r4,r3 | |
968 | 5: dcbst 0,r4 | |
969 | add r4,r4,r6 | |
970 | cmplw r4,r5 | |
971 | blt 5b | |
972 | sync /* Wait for all dcbst to complete on bus */ | |
973 | mr r4,r3 | |
974 | 6: icbi 0,r4 | |
975 | add r4,r4,r6 | |
976 | cmplw r4,r5 | |
977 | blt 6b | |
978 | 7: sync /* Wait for all icbi to complete on bus */ | |
979 | isync | |
980 | ||
7d314992 WD |
981 | /* |
982 | * Re-point the IVPR at RAM | |
983 | */ | |
984 | mtspr IVPR,r10 | |
99b0d285 | 985 | |
42d1f039 WD |
986 | /* |
987 | * We are done. Do not return, instead branch to second part of board | |
988 | * initialization, now running from RAM. | |
989 | */ | |
990 | ||
61a21e98 | 991 | addi r0,r10,in_ram - _start + _START_OFFSET |
42d1f039 WD |
992 | mtlr r0 |
993 | blr /* NEVER RETURNS! */ | |
61a21e98 | 994 | .globl in_ram |
42d1f039 WD |
995 | in_ram: |
996 | ||
997 | /* | |
0f8aa159 | 998 | * Relocation Function, r12 point to got2+0x8000 |
42d1f039 WD |
999 | * |
1000 | * Adjust got2 pointers, no need to check for 0, this code | |
1001 | * already puts a few entries in the table. | |
1002 | */ | |
1003 | li r0,__got2_entries@sectoff@l | |
1004 | la r3,GOT(_GOT2_TABLE_) | |
1005 | lwz r11,GOT(_GOT2_TABLE_) | |
1006 | mtctr r0 | |
1007 | sub r11,r3,r11 | |
1008 | addi r3,r3,-4 | |
1009 | 1: lwzu r0,4(r3) | |
afc3ba0f JT |
1010 | cmpwi r0,0 |
1011 | beq- 2f | |
42d1f039 WD |
1012 | add r0,r0,r11 |
1013 | stw r0,0(r3) | |
afc3ba0f | 1014 | 2: bdnz 1b |
42d1f039 WD |
1015 | |
1016 | /* | |
1017 | * Now adjust the fixups and the pointers to the fixups | |
1018 | * in case we need to move ourselves again. | |
1019 | */ | |
afc3ba0f | 1020 | li r0,__fixup_entries@sectoff@l |
42d1f039 WD |
1021 | lwz r3,GOT(_FIXUP_TABLE_) |
1022 | cmpwi r0,0 | |
1023 | mtctr r0 | |
1024 | addi r3,r3,-4 | |
1025 | beq 4f | |
1026 | 3: lwzu r4,4(r3) | |
1027 | lwzux r0,r4,r11 | |
1028 | add r0,r0,r11 | |
1029 | stw r10,0(r3) | |
1030 | stw r0,0(r4) | |
1031 | bdnz 3b | |
1032 | 4: | |
1033 | clear_bss: | |
1034 | /* | |
1035 | * Now clear BSS segment | |
1036 | */ | |
1037 | lwz r3,GOT(__bss_start) | |
1038 | lwz r4,GOT(_end) | |
1039 | ||
61a21e98 | 1040 | cmplw 0,r3,r4 |
42d1f039 WD |
1041 | beq 6f |
1042 | ||
61a21e98 | 1043 | li r0,0 |
42d1f039 | 1044 | 5: |
61a21e98 AF |
1045 | stw r0,0(r3) |
1046 | addi r3,r3,4 | |
1047 | cmplw 0,r3,r4 | |
42d1f039 WD |
1048 | bne 5b |
1049 | 6: | |
1050 | ||
61a21e98 AF |
1051 | mr r3,r9 /* Init Data pointer */ |
1052 | mr r4,r10 /* Destination Address */ | |
42d1f039 WD |
1053 | bl board_init_r |
1054 | ||
7da53351 | 1055 | #ifndef CONFIG_NAND_SPL |
42d1f039 WD |
1056 | /* |
1057 | * Copy exception vector code to low memory | |
1058 | * | |
1059 | * r3: dest_addr | |
1060 | * r7: source address, r8: end address, r9: target address | |
1061 | */ | |
343117bf | 1062 | .globl trap_init |
42d1f039 | 1063 | trap_init: |
0f8aa159 JT |
1064 | mflr r4 /* save link register */ |
1065 | GET_GOT | |
61a21e98 AF |
1066 | lwz r7,GOT(_start_of_vectors) |
1067 | lwz r8,GOT(_end_of_vectors) | |
42d1f039 | 1068 | |
61a21e98 | 1069 | li r9,0x100 /* reset vector always at 0x100 */ |
42d1f039 | 1070 | |
61a21e98 | 1071 | cmplw 0,r7,r8 |
343117bf | 1072 | bgelr /* return if r7>=r8 - just in case */ |
42d1f039 | 1073 | 1: |
61a21e98 AF |
1074 | lwz r0,0(r7) |
1075 | stw r0,0(r9) | |
1076 | addi r7,r7,4 | |
1077 | addi r9,r9,4 | |
1078 | cmplw 0,r7,r8 | |
343117bf | 1079 | bne 1b |
42d1f039 WD |
1080 | |
1081 | /* | |
1082 | * relocate `hdlr' and `int_return' entries | |
1083 | */ | |
61a21e98 | 1084 | li r7,.L_CriticalInput - _start + _START_OFFSET |
343117bf | 1085 | bl trap_reloc |
61a21e98 | 1086 | li r7,.L_MachineCheck - _start + _START_OFFSET |
343117bf | 1087 | bl trap_reloc |
61a21e98 | 1088 | li r7,.L_DataStorage - _start + _START_OFFSET |
343117bf | 1089 | bl trap_reloc |
61a21e98 | 1090 | li r7,.L_InstStorage - _start + _START_OFFSET |
343117bf | 1091 | bl trap_reloc |
61a21e98 | 1092 | li r7,.L_ExtInterrupt - _start + _START_OFFSET |
343117bf | 1093 | bl trap_reloc |
61a21e98 | 1094 | li r7,.L_Alignment - _start + _START_OFFSET |
343117bf | 1095 | bl trap_reloc |
61a21e98 | 1096 | li r7,.L_ProgramCheck - _start + _START_OFFSET |
343117bf | 1097 | bl trap_reloc |
61a21e98 | 1098 | li r7,.L_FPUnavailable - _start + _START_OFFSET |
343117bf | 1099 | bl trap_reloc |
61a21e98 AF |
1100 | li r7,.L_Decrementer - _start + _START_OFFSET |
1101 | bl trap_reloc | |
1102 | li r7,.L_IntervalTimer - _start + _START_OFFSET | |
1103 | li r8,_end_of_vectors - _start + _START_OFFSET | |
42d1f039 | 1104 | 2: |
343117bf | 1105 | bl trap_reloc |
61a21e98 AF |
1106 | addi r7,r7,0x100 /* next exception vector */ |
1107 | cmplw 0,r7,r8 | |
343117bf WD |
1108 | blt 2b |
1109 | ||
1110 | lis r7,0x0 | |
61a21e98 | 1111 | mtspr IVPR,r7 |
42d1f039 | 1112 | |
343117bf | 1113 | mtlr r4 /* restore link register */ |
42d1f039 WD |
1114 | blr |
1115 | ||
42d1f039 WD |
1116 | .globl unlock_ram_in_cache |
1117 | unlock_ram_in_cache: | |
1118 | /* invalidate the INIT_RAM section */ | |
a38a5b6e KG |
1119 | lis r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@h |
1120 | ori r3,r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@l | |
b009f3ec KG |
1121 | mfspr r4,L1CFG0 |
1122 | andi. r4,r4,0x1ff | |
1123 | slwi r4,r4,(10 - 1 - L1_CACHE_SHIFT) | |
61a21e98 | 1124 | mtctr r4 |
2b22fa4b | 1125 | 1: dcbi r0,r3 |
6d0f6bcf | 1126 | addi r3,r3,CONFIG_SYS_CACHELINE_SIZE |
42d1f039 | 1127 | bdnz 1b |
2b22fa4b | 1128 | sync |
21fae8b2 AF |
1129 | |
1130 | /* Invalidate the TLB entries for the cache */ | |
6d0f6bcf JCPV |
1131 | lis r3,CONFIG_SYS_INIT_RAM_ADDR@h |
1132 | ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l | |
21fae8b2 AF |
1133 | tlbivax 0,r3 |
1134 | addi r3,r3,0x1000 | |
1135 | tlbivax 0,r3 | |
1136 | addi r3,r3,0x1000 | |
1137 | tlbivax 0,r3 | |
1138 | addi r3,r3,0x1000 | |
1139 | tlbivax 0,r3 | |
42d1f039 WD |
1140 | isync |
1141 | blr | |
54e091d3 KG |
1142 | |
1143 | .globl flush_dcache | |
1144 | flush_dcache: | |
1145 | mfspr r3,SPRN_L1CFG0 | |
1146 | ||
1147 | rlwinm r5,r3,9,3 /* Extract cache block size */ | |
1148 | twlgti r5,1 /* Only 32 and 64 byte cache blocks | |
1149 | * are currently defined. | |
1150 | */ | |
1151 | li r4,32 | |
1152 | subfic r6,r5,2 /* r6 = log2(1KiB / cache block size) - | |
1153 | * log2(number of ways) | |
1154 | */ | |
1155 | slw r5,r4,r5 /* r5 = cache block size */ | |
1156 | ||
1157 | rlwinm r7,r3,0,0xff /* Extract number of KiB in the cache */ | |
1158 | mulli r7,r7,13 /* An 8-way cache will require 13 | |
1159 | * loads per set. | |
1160 | */ | |
1161 | slw r7,r7,r6 | |
1162 | ||
1163 | /* save off HID0 and set DCFA */ | |
1164 | mfspr r8,SPRN_HID0 | |
1165 | ori r9,r8,HID0_DCFA@l | |
1166 | mtspr SPRN_HID0,r9 | |
1167 | isync | |
1168 | ||
1169 | lis r4,0 | |
1170 | mtctr r7 | |
1171 | ||
1172 | 1: lwz r3,0(r4) /* Load... */ | |
1173 | add r4,r4,r5 | |
1174 | bdnz 1b | |
1175 | ||
1176 | msync | |
1177 | lis r4,0 | |
1178 | mtctr r7 | |
1179 | ||
1180 | 1: dcbf 0,r4 /* ...and flush. */ | |
1181 | add r4,r4,r5 | |
1182 | bdnz 1b | |
1183 | ||
1184 | /* restore HID0 */ | |
1185 | mtspr SPRN_HID0,r8 | |
1186 | isync | |
1187 | ||
1188 | blr | |
26f4cdba KG |
1189 | |
1190 | .globl setup_ivors | |
1191 | setup_ivors: | |
1192 | ||
1193 | #include "fixed_ivor.S" | |
1194 | blr | |
7da53351 | 1195 | #endif /* !CONFIG_NAND_SPL */ |