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8bd22949 KH |
1 | /* |
2 | * linux/arch/arm/mach-omap2/sleep.S | |
3 | * | |
4 | * (C) Copyright 2007 | |
5 | * Texas Instruments | |
6 | * Karthik Dasu <karthik-dp@ti.com> | |
7 | * | |
8 | * (C) Copyright 2004 | |
9 | * Texas Instruments, <www.ti.com> | |
10 | * Richard Woodruff <r-woodruff2@ti.com> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of | |
15 | * the License, or (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
25 | * MA 02111-1307 USA | |
26 | */ | |
27 | #include <linux/linkage.h> | |
28 | #include <asm/assembler.h> | |
29 | #include <mach/io.h> | |
ce491cf8 | 30 | #include <plat/control.h> |
8bd22949 | 31 | |
89139dce | 32 | #include "cm.h" |
8bd22949 KH |
33 | #include "prm.h" |
34 | #include "sdrc.h" | |
35 | ||
a89b6f00 RN |
36 | #define SDRC_SCRATCHPAD_SEM_V 0xfa00291c |
37 | ||
8bd22949 KH |
38 | #define PM_PREPWSTST_CORE_V OMAP34XX_PRM_REGADDR(CORE_MOD, \ |
39 | OMAP3430_PM_PREPWSTST) | |
0795a75a | 40 | #define PM_PREPWSTST_CORE_P 0x48306AE8 |
8bd22949 KH |
41 | #define PM_PREPWSTST_MPU_V OMAP34XX_PRM_REGADDR(MPU_MOD, \ |
42 | OMAP3430_PM_PREPWSTST) | |
37903009 | 43 | #define PM_PWSTCTRL_MPU_P OMAP3430_PRM_BASE + MPU_MOD + OMAP2_PM_PWSTCTRL |
89139dce | 44 | #define CM_IDLEST1_CORE_V OMAP34XX_CM_REGADDR(CORE_MOD, CM_IDLEST1) |
27d59a4a TK |
45 | #define SRAM_BASE_P 0x40200000 |
46 | #define CONTROL_STAT 0x480022F0 | |
8bd22949 KH |
47 | #define SCRATCHPAD_MEM_OFFS 0x310 /* Move this as correct place is |
48 | * available */ | |
61255ab9 RN |
49 | #define SCRATCHPAD_BASE_P (OMAP343X_CTRL_BASE + OMAP343X_CONTROL_MEM_WKUP\ |
50 | + SCRATCHPAD_MEM_OFFS) | |
8bd22949 | 51 | #define SDRC_POWER_V OMAP34XX_SDRC_REGADDR(SDRC_POWER) |
0795a75a TK |
52 | #define SDRC_SYSCONFIG_P (OMAP343X_SDRC_BASE + SDRC_SYSCONFIG) |
53 | #define SDRC_MR_0_P (OMAP343X_SDRC_BASE + SDRC_MR_0) | |
54 | #define SDRC_EMR2_0_P (OMAP343X_SDRC_BASE + SDRC_EMR2_0) | |
55 | #define SDRC_MANUAL_0_P (OMAP343X_SDRC_BASE + SDRC_MANUAL_0) | |
56 | #define SDRC_MR_1_P (OMAP343X_SDRC_BASE + SDRC_MR_1) | |
57 | #define SDRC_EMR2_1_P (OMAP343X_SDRC_BASE + SDRC_EMR2_1) | |
58 | #define SDRC_MANUAL_1_P (OMAP343X_SDRC_BASE + SDRC_MANUAL_1) | |
89139dce PDS |
59 | #define SDRC_DLLA_STATUS_V OMAP34XX_SDRC_REGADDR(SDRC_DLLA_STATUS) |
60 | #define SDRC_DLLA_CTRL_V OMAP34XX_SDRC_REGADDR(SDRC_DLLA_CTRL) | |
8bd22949 | 61 | |
a89b6f00 | 62 | .text |
46cd09a7 | 63 | /* Function to acquire the semaphore in scratchpad */ |
a89b6f00 RN |
64 | ENTRY(lock_scratchpad_sem) |
65 | stmfd sp!, {lr} @ save registers on stack | |
66 | wait_sem: | |
67 | mov r0,#1 | |
68 | ldr r1, sdrc_scratchpad_sem | |
69 | wait_loop: | |
70 | ldr r2, [r1] @ load the lock value | |
71 | cmp r2, r0 @ is the lock free ? | |
72 | beq wait_loop @ not free... | |
73 | swp r2, r0, [r1] @ semaphore free so lock it and proceed | |
74 | cmp r2, r0 @ did we succeed ? | |
75 | beq wait_sem @ no - try again | |
76 | ldmfd sp!, {pc} @ restore regs and return | |
77 | sdrc_scratchpad_sem: | |
78 | .word SDRC_SCRATCHPAD_SEM_V | |
79 | ENTRY(lock_scratchpad_sem_sz) | |
80 | .word . - lock_scratchpad_sem | |
81 | ||
82 | .text | |
83 | /* Function to release the scratchpad semaphore */ | |
84 | ENTRY(unlock_scratchpad_sem) | |
85 | stmfd sp!, {lr} @ save registers on stack | |
86 | ldr r3, sdrc_scratchpad_sem | |
87 | mov r2,#0 | |
88 | str r2,[r3] | |
89 | ldmfd sp!, {pc} @ restore regs and return | |
90 | ENTRY(unlock_scratchpad_sem_sz) | |
91 | .word . - unlock_scratchpad_sem | |
92 | ||
8bd22949 KH |
93 | .text |
94 | /* Function call to get the restore pointer for resume from OFF */ | |
95 | ENTRY(get_restore_pointer) | |
96 | stmfd sp!, {lr} @ save registers on stack | |
97 | adr r0, restore | |
98 | ldmfd sp!, {pc} @ restore regs and return | |
99 | ENTRY(get_restore_pointer_sz) | |
0795a75a TK |
100 | .word . - get_restore_pointer |
101 | ||
102 | .text | |
103 | /* Function call to get the restore pointer for for ES3 to resume from OFF */ | |
104 | ENTRY(get_es3_restore_pointer) | |
105 | stmfd sp!, {lr} @ save registers on stack | |
106 | adr r0, restore_es3 | |
107 | ldmfd sp!, {pc} @ restore regs and return | |
108 | ENTRY(get_es3_restore_pointer_sz) | |
109 | .word . - get_es3_restore_pointer | |
110 | ||
111 | ENTRY(es3_sdrc_fix) | |
112 | ldr r4, sdrc_syscfg @ get config addr | |
113 | ldr r5, [r4] @ get value | |
114 | tst r5, #0x100 @ is part access blocked | |
115 | it eq | |
116 | biceq r5, r5, #0x100 @ clear bit if set | |
117 | str r5, [r4] @ write back change | |
118 | ldr r4, sdrc_mr_0 @ get config addr | |
119 | ldr r5, [r4] @ get value | |
120 | str r5, [r4] @ write back change | |
121 | ldr r4, sdrc_emr2_0 @ get config addr | |
122 | ldr r5, [r4] @ get value | |
123 | str r5, [r4] @ write back change | |
124 | ldr r4, sdrc_manual_0 @ get config addr | |
125 | mov r5, #0x2 @ autorefresh command | |
126 | str r5, [r4] @ kick off refreshes | |
127 | ldr r4, sdrc_mr_1 @ get config addr | |
128 | ldr r5, [r4] @ get value | |
129 | str r5, [r4] @ write back change | |
130 | ldr r4, sdrc_emr2_1 @ get config addr | |
131 | ldr r5, [r4] @ get value | |
132 | str r5, [r4] @ write back change | |
133 | ldr r4, sdrc_manual_1 @ get config addr | |
134 | mov r5, #0x2 @ autorefresh command | |
135 | str r5, [r4] @ kick off refreshes | |
136 | bx lr | |
137 | sdrc_syscfg: | |
138 | .word SDRC_SYSCONFIG_P | |
139 | sdrc_mr_0: | |
140 | .word SDRC_MR_0_P | |
141 | sdrc_emr2_0: | |
142 | .word SDRC_EMR2_0_P | |
143 | sdrc_manual_0: | |
144 | .word SDRC_MANUAL_0_P | |
145 | sdrc_mr_1: | |
146 | .word SDRC_MR_1_P | |
147 | sdrc_emr2_1: | |
148 | .word SDRC_EMR2_1_P | |
149 | sdrc_manual_1: | |
150 | .word SDRC_MANUAL_1_P | |
151 | ENTRY(es3_sdrc_fix_sz) | |
152 | .word . - es3_sdrc_fix | |
27d59a4a TK |
153 | |
154 | /* Function to call rom code to save secure ram context */ | |
155 | ENTRY(save_secure_ram_context) | |
156 | stmfd sp!, {r1-r12, lr} @ save registers on stack | |
157 | save_secure_ram_debug: | |
158 | /* b save_secure_ram_debug */ @ enable to debug save code | |
159 | adr r3, api_params @ r3 points to parameters | |
160 | str r0, [r3,#0x4] @ r0 has sdram address | |
161 | ldr r12, high_mask | |
162 | and r3, r3, r12 | |
163 | ldr r12, sram_phy_addr_mask | |
164 | orr r3, r3, r12 | |
165 | mov r0, #25 @ set service ID for PPA | |
166 | mov r12, r0 @ copy secure service ID in r12 | |
167 | mov r1, #0 @ set task id for ROM code in r1 | |
ba50ea7e | 168 | mov r2, #4 @ set some flags in r2, r6 |
27d59a4a TK |
169 | mov r6, #0xff |
170 | mcr p15, 0, r0, c7, c10, 4 @ data write barrier | |
171 | mcr p15, 0, r0, c7, c10, 5 @ data memory barrier | |
172 | .word 0xE1600071 @ call SMI monitor (smi #1) | |
173 | nop | |
174 | nop | |
175 | nop | |
176 | nop | |
177 | ldmfd sp!, {r1-r12, pc} | |
178 | sram_phy_addr_mask: | |
179 | .word SRAM_BASE_P | |
180 | high_mask: | |
181 | .word 0xffff | |
182 | api_params: | |
183 | .word 0x4, 0x0, 0x0, 0x1, 0x1 | |
184 | ENTRY(save_secure_ram_context_sz) | |
185 | .word . - save_secure_ram_context | |
186 | ||
8bd22949 KH |
187 | /* |
188 | * Forces OMAP into idle state | |
189 | * | |
190 | * omap34xx_suspend() - This bit of code just executes the WFI | |
191 | * for normal idles. | |
192 | * | |
193 | * Note: This code get's copied to internal SRAM at boot. When the OMAP | |
194 | * wakes up it continues execution at the point it went to sleep. | |
195 | */ | |
196 | ENTRY(omap34xx_cpu_suspend) | |
197 | stmfd sp!, {r0-r12, lr} @ save registers on stack | |
198 | loop: | |
199 | /*b loop*/ @Enable to debug by stepping through code | |
200 | /* r0 contains restore pointer in sdram */ | |
201 | /* r1 contains information about saving context */ | |
202 | ldr r4, sdrc_power @ read the SDRC_POWER register | |
203 | ldr r5, [r4] @ read the contents of SDRC_POWER | |
204 | orr r5, r5, #0x40 @ enable self refresh on idle req | |
205 | str r5, [r4] @ write back to SDRC_POWER register | |
206 | ||
207 | cmp r1, #0x0 | |
208 | /* If context save is required, do that and execute wfi */ | |
209 | bne save_context_wfi | |
210 | /* Data memory barrier and Data sync barrier */ | |
211 | mov r1, #0 | |
212 | mcr p15, 0, r1, c7, c10, 4 | |
213 | mcr p15, 0, r1, c7, c10, 5 | |
214 | ||
215 | wfi @ wait for interrupt | |
216 | ||
217 | nop | |
218 | nop | |
219 | nop | |
220 | nop | |
221 | nop | |
222 | nop | |
223 | nop | |
224 | nop | |
225 | nop | |
226 | nop | |
89139dce | 227 | bl wait_sdrc_ok |
8bd22949 KH |
228 | |
229 | ldmfd sp!, {r0-r12, pc} @ restore regs and return | |
0795a75a TK |
230 | restore_es3: |
231 | /*b restore_es3*/ @ Enable to debug restore code | |
232 | ldr r5, pm_prepwstst_core_p | |
233 | ldr r4, [r5] | |
234 | and r4, r4, #0x3 | |
235 | cmp r4, #0x0 @ Check if previous power state of CORE is OFF | |
236 | bne restore | |
237 | adr r0, es3_sdrc_fix | |
238 | ldr r1, sram_base | |
239 | ldr r2, es3_sdrc_fix_sz | |
240 | mov r2, r2, ror #2 | |
241 | copy_to_sram: | |
242 | ldmia r0!, {r3} @ val = *src | |
243 | stmia r1!, {r3} @ *dst = val | |
244 | subs r2, r2, #0x1 @ num_words-- | |
245 | bne copy_to_sram | |
246 | ldr r1, sram_base | |
247 | blx r1 | |
8bd22949 | 248 | restore: |
61255ab9 | 249 | /* b restore*/ @ Enable to debug restore code |
8bd22949 KH |
250 | /* Check what was the reason for mpu reset and store the reason in r9*/ |
251 | /* 1 - Only L1 and logic lost */ | |
252 | /* 2 - Only L2 lost - In this case, we wont be here */ | |
253 | /* 3 - Both L1 and L2 lost */ | |
254 | ldr r1, pm_pwstctrl_mpu | |
255 | ldr r2, [r1] | |
256 | and r2, r2, #0x3 | |
257 | cmp r2, #0x0 @ Check if target power state was OFF or RET | |
258 | moveq r9, #0x3 @ MPU OFF => L1 and L2 lost | |
259 | movne r9, #0x1 @ Only L1 and L2 lost => avoid L2 invalidation | |
260 | bne logic_l1_restore | |
27d59a4a TK |
261 | ldr r0, control_stat |
262 | ldr r1, [r0] | |
263 | and r1, #0x700 | |
264 | cmp r1, #0x300 | |
265 | beq l2_inv_gp | |
266 | mov r0, #40 @ set service ID for PPA | |
267 | mov r12, r0 @ copy secure Service ID in r12 | |
268 | mov r1, #0 @ set task id for ROM code in r1 | |
269 | mov r2, #4 @ set some flags in r2, r6 | |
270 | mov r6, #0xff | |
271 | adr r3, l2_inv_api_params @ r3 points to dummy parameters | |
272 | mcr p15, 0, r0, c7, c10, 4 @ data write barrier | |
273 | mcr p15, 0, r0, c7, c10, 5 @ data memory barrier | |
274 | .word 0xE1600071 @ call SMI monitor (smi #1) | |
275 | /* Write to Aux control register to set some bits */ | |
276 | mov r0, #42 @ set service ID for PPA | |
277 | mov r12, r0 @ copy secure Service ID in r12 | |
278 | mov r1, #0 @ set task id for ROM code in r1 | |
279 | mov r2, #4 @ set some flags in r2, r6 | |
280 | mov r6, #0xff | |
a087cad9 TK |
281 | ldr r4, scratchpad_base |
282 | ldr r3, [r4, #0xBC] @ r3 points to parameters | |
27d59a4a TK |
283 | mcr p15, 0, r0, c7, c10, 4 @ data write barrier |
284 | mcr p15, 0, r0, c7, c10, 5 @ data memory barrier | |
285 | .word 0xE1600071 @ call SMI monitor (smi #1) | |
286 | ||
79dcfdd4 TK |
287 | #ifdef CONFIG_OMAP3_L2_AUX_SECURE_SAVE_RESTORE |
288 | /* Restore L2 aux control register */ | |
289 | @ set service ID for PPA | |
290 | mov r0, #CONFIG_OMAP3_L2_AUX_SECURE_SERVICE_SET_ID | |
291 | mov r12, r0 @ copy service ID in r12 | |
292 | mov r1, #0 @ set task ID for ROM code in r1 | |
293 | mov r2, #4 @ set some flags in r2, r6 | |
294 | mov r6, #0xff | |
295 | ldr r4, scratchpad_base | |
296 | ldr r3, [r4, #0xBC] | |
297 | adds r3, r3, #8 @ r3 points to parameters | |
298 | mcr p15, 0, r0, c7, c10, 4 @ data write barrier | |
299 | mcr p15, 0, r0, c7, c10, 5 @ data memory barrier | |
300 | .word 0xE1600071 @ call SMI monitor (smi #1) | |
301 | #endif | |
27d59a4a TK |
302 | b logic_l1_restore |
303 | l2_inv_api_params: | |
304 | .word 0x1, 0x00 | |
27d59a4a | 305 | l2_inv_gp: |
8bd22949 KH |
306 | /* Execute smi to invalidate L2 cache */ |
307 | mov r12, #0x1 @ set up to invalide L2 | |
27d59a4a TK |
308 | smi: .word 0xE1600070 @ Call SMI monitor (smieq) |
309 | /* Write to Aux control register to set some bits */ | |
a087cad9 TK |
310 | ldr r4, scratchpad_base |
311 | ldr r3, [r4,#0xBC] | |
312 | ldr r0, [r3,#4] | |
27d59a4a TK |
313 | mov r12, #0x3 |
314 | .word 0xE1600070 @ Call SMI monitor (smieq) | |
79dcfdd4 TK |
315 | ldr r4, scratchpad_base |
316 | ldr r3, [r4,#0xBC] | |
317 | ldr r0, [r3,#12] | |
318 | mov r12, #0x2 | |
319 | .word 0xE1600070 @ Call SMI monitor (smieq) | |
8bd22949 KH |
320 | logic_l1_restore: |
321 | mov r1, #0 | |
322 | /* Invalidate all instruction caches to PoU | |
323 | * and flush branch target cache */ | |
324 | mcr p15, 0, r1, c7, c5, 0 | |
325 | ||
326 | ldr r4, scratchpad_base | |
327 | ldr r3, [r4,#0xBC] | |
79dcfdd4 | 328 | adds r3, r3, #16 |
8bd22949 KH |
329 | ldmia r3!, {r4-r6} |
330 | mov sp, r4 | |
331 | msr spsr_cxsf, r5 | |
332 | mov lr, r6 | |
333 | ||
334 | ldmia r3!, {r4-r9} | |
335 | /* Coprocessor access Control Register */ | |
336 | mcr p15, 0, r4, c1, c0, 2 | |
337 | ||
338 | /* TTBR0 */ | |
339 | MCR p15, 0, r5, c2, c0, 0 | |
340 | /* TTBR1 */ | |
341 | MCR p15, 0, r6, c2, c0, 1 | |
342 | /* Translation table base control register */ | |
343 | MCR p15, 0, r7, c2, c0, 2 | |
344 | /*domain access Control Register */ | |
345 | MCR p15, 0, r8, c3, c0, 0 | |
346 | /* data fault status Register */ | |
347 | MCR p15, 0, r9, c5, c0, 0 | |
348 | ||
349 | ldmia r3!,{r4-r8} | |
350 | /* instruction fault status Register */ | |
351 | MCR p15, 0, r4, c5, c0, 1 | |
352 | /*Data Auxiliary Fault Status Register */ | |
353 | MCR p15, 0, r5, c5, c1, 0 | |
354 | /*Instruction Auxiliary Fault Status Register*/ | |
355 | MCR p15, 0, r6, c5, c1, 1 | |
356 | /*Data Fault Address Register */ | |
357 | MCR p15, 0, r7, c6, c0, 0 | |
358 | /*Instruction Fault Address Register*/ | |
359 | MCR p15, 0, r8, c6, c0, 2 | |
360 | ldmia r3!,{r4-r7} | |
361 | ||
362 | /* user r/w thread and process ID */ | |
363 | MCR p15, 0, r4, c13, c0, 2 | |
364 | /* user ro thread and process ID */ | |
365 | MCR p15, 0, r5, c13, c0, 3 | |
366 | /*Privileged only thread and process ID */ | |
367 | MCR p15, 0, r6, c13, c0, 4 | |
368 | /* cache size selection */ | |
369 | MCR p15, 2, r7, c0, c0, 0 | |
370 | ldmia r3!,{r4-r8} | |
371 | /* Data TLB lockdown registers */ | |
372 | MCR p15, 0, r4, c10, c0, 0 | |
373 | /* Instruction TLB lockdown registers */ | |
374 | MCR p15, 0, r5, c10, c0, 1 | |
375 | /* Secure or Nonsecure Vector Base Address */ | |
376 | MCR p15, 0, r6, c12, c0, 0 | |
377 | /* FCSE PID */ | |
378 | MCR p15, 0, r7, c13, c0, 0 | |
379 | /* Context PID */ | |
380 | MCR p15, 0, r8, c13, c0, 1 | |
381 | ||
382 | ldmia r3!,{r4-r5} | |
383 | /* primary memory remap register */ | |
384 | MCR p15, 0, r4, c10, c2, 0 | |
385 | /*normal memory remap register */ | |
386 | MCR p15, 0, r5, c10, c2, 1 | |
387 | ||
388 | /* Restore cpsr */ | |
389 | ldmia r3!,{r4} /*load CPSR from SDRAM*/ | |
390 | msr cpsr, r4 /*store cpsr */ | |
391 | ||
392 | /* Enabling MMU here */ | |
393 | mrc p15, 0, r7, c2, c0, 2 /* Read TTBRControl */ | |
394 | /* Extract N (0:2) bits and decide whether to use TTBR0 or TTBR1*/ | |
395 | and r7, #0x7 | |
396 | cmp r7, #0x0 | |
397 | beq usettbr0 | |
398 | ttbr_error: | |
399 | /* More work needs to be done to support N[0:2] value other than 0 | |
400 | * So looping here so that the error can be detected | |
401 | */ | |
402 | b ttbr_error | |
403 | usettbr0: | |
404 | mrc p15, 0, r2, c2, c0, 0 | |
405 | ldr r5, ttbrbit_mask | |
406 | and r2, r5 | |
407 | mov r4, pc | |
408 | ldr r5, table_index_mask | |
409 | and r4, r5 /* r4 = 31 to 20 bits of pc */ | |
410 | /* Extract the value to be written to table entry */ | |
411 | ldr r1, table_entry | |
412 | add r1, r1, r4 /* r1 has value to be written to table entry*/ | |
413 | /* Getting the address of table entry to modify */ | |
414 | lsr r4, #18 | |
415 | add r2, r4 /* r2 has the location which needs to be modified */ | |
416 | /* Storing previous entry of location being modified */ | |
417 | ldr r5, scratchpad_base | |
418 | ldr r4, [r2] | |
419 | str r4, [r5, #0xC0] | |
420 | /* Modify the table entry */ | |
421 | str r1, [r2] | |
422 | /* Storing address of entry being modified | |
423 | * - will be restored after enabling MMU */ | |
424 | ldr r5, scratchpad_base | |
425 | str r2, [r5, #0xC4] | |
426 | ||
427 | mov r0, #0 | |
428 | mcr p15, 0, r0, c7, c5, 4 @ Flush prefetch buffer | |
429 | mcr p15, 0, r0, c7, c5, 6 @ Invalidate branch predictor array | |
430 | mcr p15, 0, r0, c8, c5, 0 @ Invalidate instruction TLB | |
431 | mcr p15, 0, r0, c8, c6, 0 @ Invalidate data TLB | |
432 | /* Restore control register but dont enable caches here*/ | |
433 | /* Caches will be enabled after restoring MMU table entry */ | |
434 | ldmia r3!, {r4} | |
435 | /* Store previous value of control register in scratchpad */ | |
436 | str r4, [r5, #0xC8] | |
437 | ldr r2, cache_pred_disable_mask | |
438 | and r4, r2 | |
439 | mcr p15, 0, r4, c1, c0, 0 | |
440 | ||
441 | ldmfd sp!, {r0-r12, pc} @ restore regs and return | |
442 | save_context_wfi: | |
443 | /*b save_context_wfi*/ @ enable to debug save code | |
444 | mov r8, r0 /* Store SDRAM address in r8 */ | |
a087cad9 TK |
445 | mrc p15, 0, r5, c1, c0, 1 @ Read Auxiliary Control Register |
446 | mov r4, #0x1 @ Number of parameters for restore call | |
79dcfdd4 TK |
447 | stmia r8!, {r4-r5} @ Push parameters for restore call |
448 | mrc p15, 1, r5, c9, c0, 2 @ Read L2 AUX ctrl register | |
449 | stmia r8!, {r4-r5} @ Push parameters for restore call | |
8bd22949 KH |
450 | /* Check what that target sleep state is:stored in r1*/ |
451 | /* 1 - Only L1 and logic lost */ | |
452 | /* 2 - Only L2 lost */ | |
453 | /* 3 - Both L1 and L2 lost */ | |
454 | cmp r1, #0x2 /* Only L2 lost */ | |
455 | beq clean_l2 | |
456 | cmp r1, #0x1 /* L2 retained */ | |
457 | /* r9 stores whether to clean L2 or not*/ | |
458 | moveq r9, #0x0 /* Dont Clean L2 */ | |
459 | movne r9, #0x1 /* Clean L2 */ | |
460 | l1_logic_lost: | |
461 | /* Store sp and spsr to SDRAM */ | |
462 | mov r4, sp | |
463 | mrs r5, spsr | |
464 | mov r6, lr | |
465 | stmia r8!, {r4-r6} | |
466 | /* Save all ARM registers */ | |
467 | /* Coprocessor access control register */ | |
468 | mrc p15, 0, r6, c1, c0, 2 | |
469 | stmia r8!, {r6} | |
470 | /* TTBR0, TTBR1 and Translation table base control */ | |
471 | mrc p15, 0, r4, c2, c0, 0 | |
472 | mrc p15, 0, r5, c2, c0, 1 | |
473 | mrc p15, 0, r6, c2, c0, 2 | |
474 | stmia r8!, {r4-r6} | |
475 | /* Domain access control register, data fault status register, | |
476 | and instruction fault status register */ | |
477 | mrc p15, 0, r4, c3, c0, 0 | |
478 | mrc p15, 0, r5, c5, c0, 0 | |
479 | mrc p15, 0, r6, c5, c0, 1 | |
480 | stmia r8!, {r4-r6} | |
481 | /* Data aux fault status register, instruction aux fault status, | |
482 | datat fault address register and instruction fault address register*/ | |
483 | mrc p15, 0, r4, c5, c1, 0 | |
484 | mrc p15, 0, r5, c5, c1, 1 | |
485 | mrc p15, 0, r6, c6, c0, 0 | |
486 | mrc p15, 0, r7, c6, c0, 2 | |
487 | stmia r8!, {r4-r7} | |
488 | /* user r/w thread and process ID, user r/o thread and process ID, | |
489 | priv only thread and process ID, cache size selection */ | |
490 | mrc p15, 0, r4, c13, c0, 2 | |
491 | mrc p15, 0, r5, c13, c0, 3 | |
492 | mrc p15, 0, r6, c13, c0, 4 | |
493 | mrc p15, 2, r7, c0, c0, 0 | |
494 | stmia r8!, {r4-r7} | |
495 | /* Data TLB lockdown, instruction TLB lockdown registers */ | |
496 | mrc p15, 0, r5, c10, c0, 0 | |
497 | mrc p15, 0, r6, c10, c0, 1 | |
498 | stmia r8!, {r5-r6} | |
499 | /* Secure or non secure vector base address, FCSE PID, Context PID*/ | |
500 | mrc p15, 0, r4, c12, c0, 0 | |
501 | mrc p15, 0, r5, c13, c0, 0 | |
502 | mrc p15, 0, r6, c13, c0, 1 | |
503 | stmia r8!, {r4-r6} | |
504 | /* Primary remap, normal remap registers */ | |
505 | mrc p15, 0, r4, c10, c2, 0 | |
506 | mrc p15, 0, r5, c10, c2, 1 | |
507 | stmia r8!,{r4-r5} | |
508 | ||
509 | /* Store current cpsr*/ | |
510 | mrs r2, cpsr | |
511 | stmia r8!, {r2} | |
512 | ||
513 | mrc p15, 0, r4, c1, c0, 0 | |
514 | /* save control register */ | |
515 | stmia r8!, {r4} | |
516 | clean_caches: | |
517 | /* Clean Data or unified cache to POU*/ | |
518 | /* How to invalidate only L1 cache???? - #FIX_ME# */ | |
519 | /* mcr p15, 0, r11, c7, c11, 1 */ | |
520 | cmp r9, #1 /* Check whether L2 inval is required or not*/ | |
521 | bne skip_l2_inval | |
522 | clean_l2: | |
523 | /* read clidr */ | |
524 | mrc p15, 1, r0, c0, c0, 1 | |
525 | /* extract loc from clidr */ | |
526 | ands r3, r0, #0x7000000 | |
527 | /* left align loc bit field */ | |
528 | mov r3, r3, lsr #23 | |
529 | /* if loc is 0, then no need to clean */ | |
530 | beq finished | |
531 | /* start clean at cache level 0 */ | |
532 | mov r10, #0 | |
533 | loop1: | |
534 | /* work out 3x current cache level */ | |
535 | add r2, r10, r10, lsr #1 | |
536 | /* extract cache type bits from clidr*/ | |
537 | mov r1, r0, lsr r2 | |
538 | /* mask of the bits for current cache only */ | |
539 | and r1, r1, #7 | |
540 | /* see what cache we have at this level */ | |
541 | cmp r1, #2 | |
542 | /* skip if no cache, or just i-cache */ | |
543 | blt skip | |
544 | /* select current cache level in cssr */ | |
545 | mcr p15, 2, r10, c0, c0, 0 | |
546 | /* isb to sych the new cssr&csidr */ | |
547 | isb | |
548 | /* read the new csidr */ | |
549 | mrc p15, 1, r1, c0, c0, 0 | |
550 | /* extract the length of the cache lines */ | |
551 | and r2, r1, #7 | |
552 | /* add 4 (line length offset) */ | |
553 | add r2, r2, #4 | |
554 | ldr r4, assoc_mask | |
555 | /* find maximum number on the way size */ | |
556 | ands r4, r4, r1, lsr #3 | |
557 | /* find bit position of way size increment */ | |
558 | clz r5, r4 | |
559 | ldr r7, numset_mask | |
560 | /* extract max number of the index size*/ | |
561 | ands r7, r7, r1, lsr #13 | |
562 | loop2: | |
563 | mov r9, r4 | |
564 | /* create working copy of max way size*/ | |
565 | loop3: | |
566 | /* factor way and cache number into r11 */ | |
567 | orr r11, r10, r9, lsl r5 | |
568 | /* factor index number into r11 */ | |
569 | orr r11, r11, r7, lsl r2 | |
570 | /*clean & invalidate by set/way */ | |
571 | mcr p15, 0, r11, c7, c10, 2 | |
572 | /* decrement the way*/ | |
573 | subs r9, r9, #1 | |
574 | bge loop3 | |
575 | /*decrement the index */ | |
576 | subs r7, r7, #1 | |
577 | bge loop2 | |
578 | skip: | |
579 | add r10, r10, #2 | |
580 | /* increment cache number */ | |
581 | cmp r3, r10 | |
582 | bgt loop1 | |
583 | finished: | |
584 | /*swith back to cache level 0 */ | |
585 | mov r10, #0 | |
586 | /* select current cache level in cssr */ | |
587 | mcr p15, 2, r10, c0, c0, 0 | |
588 | isb | |
589 | skip_l2_inval: | |
590 | /* Data memory barrier and Data sync barrier */ | |
591 | mov r1, #0 | |
592 | mcr p15, 0, r1, c7, c10, 4 | |
593 | mcr p15, 0, r1, c7, c10, 5 | |
594 | ||
595 | wfi @ wait for interrupt | |
596 | nop | |
597 | nop | |
598 | nop | |
599 | nop | |
600 | nop | |
601 | nop | |
602 | nop | |
603 | nop | |
604 | nop | |
605 | nop | |
89139dce | 606 | bl wait_sdrc_ok |
8bd22949 KH |
607 | /* restore regs and return */ |
608 | ldmfd sp!, {r0-r12, pc} | |
609 | ||
89139dce PDS |
610 | /* Make sure SDRC accesses are ok */ |
611 | wait_sdrc_ok: | |
612 | ldr r4, cm_idlest1_core | |
613 | ldr r5, [r4] | |
614 | and r5, r5, #0x2 | |
615 | cmp r5, #0 | |
616 | bne wait_sdrc_ok | |
617 | ldr r4, sdrc_power | |
618 | ldr r5, [r4] | |
619 | bic r5, r5, #0x40 | |
620 | str r5, [r4] | |
621 | wait_dll_lock: | |
622 | /* Is dll in lock mode? */ | |
623 | ldr r4, sdrc_dlla_ctrl | |
624 | ldr r5, [r4] | |
625 | tst r5, #0x4 | |
626 | bxne lr | |
627 | /* wait till dll locks */ | |
628 | ldr r4, sdrc_dlla_status | |
629 | ldr r5, [r4] | |
630 | and r5, r5, #0x4 | |
631 | cmp r5, #0x4 | |
632 | bne wait_dll_lock | |
633 | bx lr | |
8bd22949 | 634 | |
89139dce PDS |
635 | cm_idlest1_core: |
636 | .word CM_IDLEST1_CORE_V | |
637 | sdrc_dlla_status: | |
638 | .word SDRC_DLLA_STATUS_V | |
639 | sdrc_dlla_ctrl: | |
640 | .word SDRC_DLLA_CTRL_V | |
8bd22949 KH |
641 | pm_prepwstst_core: |
642 | .word PM_PREPWSTST_CORE_V | |
0795a75a TK |
643 | pm_prepwstst_core_p: |
644 | .word PM_PREPWSTST_CORE_P | |
8bd22949 KH |
645 | pm_prepwstst_mpu: |
646 | .word PM_PREPWSTST_MPU_V | |
647 | pm_pwstctrl_mpu: | |
648 | .word PM_PWSTCTRL_MPU_P | |
649 | scratchpad_base: | |
650 | .word SCRATCHPAD_BASE_P | |
0795a75a TK |
651 | sram_base: |
652 | .word SRAM_BASE_P + 0x8000 | |
8bd22949 KH |
653 | sdrc_power: |
654 | .word SDRC_POWER_V | |
8bd22949 KH |
655 | clk_stabilize_delay: |
656 | .word 0x000001FF | |
657 | assoc_mask: | |
658 | .word 0x3ff | |
659 | numset_mask: | |
660 | .word 0x7fff | |
661 | ttbrbit_mask: | |
662 | .word 0xFFFFC000 | |
663 | table_index_mask: | |
664 | .word 0xFFF00000 | |
665 | table_entry: | |
666 | .word 0x00000C02 | |
667 | cache_pred_disable_mask: | |
668 | .word 0xFFFFE7FB | |
27d59a4a TK |
669 | control_stat: |
670 | .word CONTROL_STAT | |
8bd22949 KH |
671 | ENTRY(omap34xx_cpu_suspend_sz) |
672 | .word . - omap34xx_cpu_suspend |