2 * Copyright (c) 2010 Per Odlund <per.odlund@armagedon.se>
3 * Copyright (C) 2011 MARVELL INTERNATIONAL LTD.
6 * Developed by Semihalf.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of MARVELL nor the names of contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <machine/asm.h>
34 __FBSDID("$FreeBSD$");
36 #include <machine/sysreg.h>
41 .word _C_LABEL(arm_cache_loc)
43 .word _C_LABEL(arm_cache_type)
51 #define PT_NOS (1 << 5)
54 #define PT_INNER_WT (1 << 0)
55 #define PT_INNER_WB ((1 << 0) | (1 << 6))
56 #define PT_INNER_WBWA (1 << 6)
58 #define PT_OUTER_WT (2 << 3)
59 #define PT_OUTER_WB (3 << 3)
60 #define PT_OUTER_WBWA (1 << 3)
63 #define PT_ATTR (PT_S|PT_INNER_WBWA|PT_OUTER_WBWA|PT_NOS)
65 #define PT_ATTR (PT_INNER_WBWA|PT_OUTER_WBWA)
70 bl _C_LABEL(armv7_idcache_wbinv_all) /* clean the D cache */
87 ENTRY(armv7_tlb_flushID)
99 END(armv7_tlb_flushID)
101 ENTRY(armv7_tlb_flushID_SE)
105 mcr CP15_TLBIMVAAIS(r0)
114 END(armv7_tlb_flushID_SE)
116 /* Based on algorithm from ARM Architecture Reference Manual */
117 ENTRY(armv7_dcache_wbinv_all)
118 stmdb sp!, {r4, r5, r6, r7, r8, r9}
120 /* Get cache level */
121 ldr r0, .Lcoherency_level
125 /* For each cache level */
128 /* Get cache type for given level */
138 /* Get number of ways */
140 ands r4, r4, r1, lsr #3
145 ands r7, r7, r1, lsr #13
150 orr r6, r6, r9, lsl r5
151 orr r6, r6, r7, lsl r2
153 /* Clean and invalidate data cache by way/index */
165 ldmia sp!, {r4, r5, r6, r7, r8, r9}
167 END(armv7_dcache_wbinv_all)
169 ENTRY(armv7_idcache_wbinv_all)
171 bl armv7_dcache_wbinv_all
181 END(armv7_idcache_wbinv_all)
183 /* XXX Temporary set it to 32 for MV cores, however this value should be
184 * get from Cache Type register
189 ENTRY(armv7_dcache_wb_range)
190 ldr ip, .Larmv7_line_size
200 dsb /* data synchronization barrier */
202 END(armv7_dcache_wb_range)
204 ENTRY(armv7_dcache_wbinv_range)
205 ldr ip, .Larmv7_line_size
211 mcr CP15_DCCIMVAC(r0)
214 bhi .Larmv7_wbinv_next
215 dsb /* data synchronization barrier */
217 END(armv7_dcache_wbinv_range)
220 * Note, we must not invalidate everything. If the range is too big we
221 * must use wb-inv of the entire cache.
223 ENTRY(armv7_dcache_inv_range)
224 ldr ip, .Larmv7_line_size
234 dsb /* data synchronization barrier */
236 END(armv7_dcache_inv_range)
238 ENTRY(armv7_idcache_wbinv_range)
239 ldr ip, .Larmv7_line_size
244 .Larmv7_id_wbinv_next:
246 mcr CP15_DCCIMVAC(r0)
249 bhi .Larmv7_id_wbinv_next
250 isb /* instruction synchronization barrier */
251 dsb /* data synchronization barrier */
253 END(armv7_idcache_wbinv_range)
255 ENTRY_NP(armv7_icache_sync_all)
261 isb /* instruction synchronization barrier */
262 dsb /* data synchronization barrier */
264 END(armv7_icache_sync_all)
266 ENTRY_NP(armv7_icache_sync_range)
267 ldr ip, .Larmv7_line_size
273 bhi .Larmv7_sync_next
274 isb /* instruction synchronization barrier */
275 dsb /* data synchronization barrier */
277 END(armv7_icache_sync_range)
279 ENTRY(armv7_cpu_sleep)
280 dsb /* data synchronization barrier */
281 wfi /* wait for interrupt */
285 ENTRY(armv7_context_switch)
299 END(armv7_context_switch)
301 ENTRY(armv7_drain_writebuf)
304 END(armv7_drain_writebuf)
315 bic r3, r2, r0 /* Clear bits */
316 eor r3, r3, r1 /* XOR bits */
325 * Invalidate all I+D+branch cache. Used by startup code, which counts
326 * on the fact that only r0-r3,ip are modified and no stack space is used.
328 ENTRY(armv7_idcache_inv_all)
330 mcr CP15_CSSELR(r0) @ set cache level to L1
333 ubfx r2, r0, #13, #15 @ get num sets - 1 from CCSIDR
334 ubfx r3, r0, #3, #10 @ get numways - 1 from CCSIDR
335 clz r1, r3 @ number of bits to MSB of way
336 lsl r3, r3, r1 @ shift into position
338 lsl ip, ip, r1 @ ip now contains the way decr
340 ubfx r0, r0, #0, #3 @ get linesize from CCSIDR
341 add r0, r0, #4 @ apply bias
342 lsl r2, r2, r0 @ shift sets by log2(linesize)
343 add r3, r3, r2 @ merge numsets - 1 with numways - 1
344 sub ip, ip, r2 @ subtract numsets - 1 from way decr
346 lsl r1, r1, r0 @ r1 now contains the set decr
347 mov r2, ip @ r2 now contains set way decr
349 /* r3 = ways/sets, r2 = way decr, r1 = set decr, r0 and ip are free */
350 1: mcr CP15_DCISW(r3) @ invalidate line
351 movs r0, r3 @ get current way/set
352 beq 2f @ at 0 means we are done.
353 movs r0, r0, lsl #10 @ clear way bits leaving only set bits
354 subne r3, r3, r1 @ non-zero?, decrement set #
355 subeq r3, r3, r2 @ zero?, decrement way # and restore set count
358 2: dsb @ wait for stores to finish
360 mcr CP15_ICIALLU @ invalidate instruction+branch cache
361 isb @ instruction sync barrier
363 END(armv7_idcache_inv_all)
365 ENTRY_NP(armv7_sleep)