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-rw-r--r--arch/arm/mm/Kconfig19
-rw-r--r--arch/arm/mm/Makefile2
-rw-r--r--arch/arm/mm/copypage-xsc3.S97
-rw-r--r--arch/arm/mm/mm-armv.c3
-rw-r--r--arch/arm/mm/proc-v6.S16
-rw-r--r--arch/arm/mm/proc-xsc3.S498
6 files changed, 629 insertions, 6 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index e680c5fd93b5..c55b739e10ba 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -239,6 +239,17 @@ config CPU_XSCALE
239 select CPU_CACHE_VIVT 239 select CPU_CACHE_VIVT
240 select CPU_TLB_V4WBI 240 select CPU_TLB_V4WBI
241 241
242# XScale Core Version 3
243config CPU_XSC3
244 bool
245 depends on ARCH_IXP23XX
246 default y
247 select CPU_32v5
248 select CPU_ABRT_EV5T
249 select CPU_CACHE_VIVT
250 select CPU_TLB_V4WBI
251 select IO_36
252
242# ARMv6 253# ARMv6
243config CPU_V6 254config CPU_V6
244 bool "Support ARM V6 processor" 255 bool "Support ARM V6 processor"
@@ -361,11 +372,17 @@ config CPU_TLB_V4WBI
361config CPU_TLB_V6 372config CPU_TLB_V6
362 bool 373 bool
363 374
375#
376# CPU supports 36-bit I/O
377#
378config IO_36
379 bool
380
364comment "Processor Features" 381comment "Processor Features"
365 382
366config ARM_THUMB 383config ARM_THUMB
367 bool "Support Thumb user binaries" 384 bool "Support Thumb user binaries"
368 depends on CPU_ARM720T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || CPU_XSCALE || CPU_V6 385 depends on CPU_ARM720T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || CPU_XSCALE || CPU_XSC3 || CPU_V6
369 default y 386 default y
370 help 387 help
371 Say Y if you want to include kernel support for running user space 388 Say Y if you want to include kernel support for running user space
diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile
index ffe73ba2bf17..07a538505784 100644
--- a/arch/arm/mm/Makefile
+++ b/arch/arm/mm/Makefile
@@ -30,6 +30,7 @@ obj-$(CONFIG_CPU_COPY_V4WB) += copypage-v4wb.o
30obj-$(CONFIG_CPU_COPY_V6) += copypage-v6.o mmu.o 30obj-$(CONFIG_CPU_COPY_V6) += copypage-v6.o mmu.o
31obj-$(CONFIG_CPU_SA1100) += copypage-v4mc.o 31obj-$(CONFIG_CPU_SA1100) += copypage-v4mc.o
32obj-$(CONFIG_CPU_XSCALE) += copypage-xscale.o 32obj-$(CONFIG_CPU_XSCALE) += copypage-xscale.o
33obj-$(CONFIG_CPU_XSC3) += copypage-xsc3.o
33 34
34obj-$(CONFIG_CPU_TLB_V3) += tlb-v3.o 35obj-$(CONFIG_CPU_TLB_V3) += tlb-v3.o
35obj-$(CONFIG_CPU_TLB_V4WT) += tlb-v4.o 36obj-$(CONFIG_CPU_TLB_V4WT) += tlb-v4.o
@@ -51,4 +52,5 @@ obj-$(CONFIG_CPU_ARM1026) += proc-arm1026.o
51obj-$(CONFIG_CPU_SA110) += proc-sa110.o 52obj-$(CONFIG_CPU_SA110) += proc-sa110.o
52obj-$(CONFIG_CPU_SA1100) += proc-sa1100.o 53obj-$(CONFIG_CPU_SA1100) += proc-sa1100.o
53obj-$(CONFIG_CPU_XSCALE) += proc-xscale.o 54obj-$(CONFIG_CPU_XSCALE) += proc-xscale.o
55obj-$(CONFIG_CPU_XSC3) += proc-xsc3.o
54obj-$(CONFIG_CPU_V6) += proc-v6.o 56obj-$(CONFIG_CPU_V6) += proc-v6.o
diff --git a/arch/arm/mm/copypage-xsc3.S b/arch/arm/mm/copypage-xsc3.S
new file mode 100644
index 000000000000..9a2cb4332b4c
--- /dev/null
+++ b/arch/arm/mm/copypage-xsc3.S
@@ -0,0 +1,97 @@
1/*
2 * linux/arch/arm/lib/copypage-xsc3.S
3 *
4 * Copyright (C) 2004 Intel Corp.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * Adapted for 3rd gen XScale core, no more mini-dcache
11 * Author: Matt Gilbert (matthew.m.gilbert@intel.com)
12 */
13
14#include <linux/linkage.h>
15#include <linux/init.h>
16#include <asm/asm-offsets.h>
17
18/*
19 * General note:
20 * We don't really want write-allocate cache behaviour for these functions
21 * since that will just eat through 8K of the cache.
22 */
23
24 .text
25 .align 5
26/*
27 * XSC3 optimised copy_user_page
28 * r0 = destination
29 * r1 = source
30 * r2 = virtual user address of ultimate destination page
31 *
32 * The source page may have some clean entries in the cache already, but we
33 * can safely ignore them - break_cow() will flush them out of the cache
34 * if we eventually end up using our copied page.
35 *
36 */
37ENTRY(xsc3_mc_copy_user_page)
38 stmfd sp!, {r4, r5, lr}
39 mov lr, #PAGE_SZ/64-1
40
41 pld [r1, #0]
42 pld [r1, #32]
431: pld [r1, #64]
44 pld [r1, #96]
45
462: ldrd r2, [r1], #8
47 mov ip, r0
48 ldrd r4, [r1], #8
49 mcr p15, 0, ip, c7, c6, 1 @ invalidate
50 strd r2, [r0], #8
51 ldrd r2, [r1], #8
52 strd r4, [r0], #8
53 ldrd r4, [r1], #8
54 strd r2, [r0], #8
55 strd r4, [r0], #8
56 ldrd r2, [r1], #8
57 mov ip, r0
58 ldrd r4, [r1], #8
59 mcr p15, 0, ip, c7, c6, 1 @ invalidate
60 strd r2, [r0], #8
61 ldrd r2, [r1], #8
62 subs lr, lr, #1
63 strd r4, [r0], #8
64 ldrd r4, [r1], #8
65 strd r2, [r0], #8
66 strd r4, [r0], #8
67 bgt 1b
68 beq 2b
69
70 ldmfd sp!, {r4, r5, pc}
71
72 .align 5
73/*
74 * XScale optimised clear_user_page
75 * r0 = destination
76 * r1 = virtual user address of ultimate destination page
77 */
78ENTRY(xsc3_mc_clear_user_page)
79 mov r1, #PAGE_SZ/32
80 mov r2, #0
81 mov r3, #0
821: mcr p15, 0, r0, c7, c6, 1 @ invalidate line
83 strd r2, [r0], #8
84 strd r2, [r0], #8
85 strd r2, [r0], #8
86 strd r2, [r0], #8
87 subs r1, r1, #1
88 bne 1b
89 mov pc, lr
90
91 __INITDATA
92
93 .type xsc3_mc_user_fns, #object
94ENTRY(xsc3_mc_user_fns)
95 .long xsc3_mc_clear_user_page
96 .long xsc3_mc_copy_user_page
97 .size xsc3_mc_user_fns, . - xsc3_mc_user_fns
diff --git a/arch/arm/mm/mm-armv.c b/arch/arm/mm/mm-armv.c
index ef8d30a185a9..5e5d05bcad50 100644
--- a/arch/arm/mm/mm-armv.c
+++ b/arch/arm/mm/mm-armv.c
@@ -557,7 +557,8 @@ void __init create_mapping(struct map_desc *md)
557 * supersections are only allocated for domain 0 regardless 557 * supersections are only allocated for domain 0 regardless
558 * of the actual domain assignments in use. 558 * of the actual domain assignments in use.
559 */ 559 */
560 if (cpu_architecture() >= CPU_ARCH_ARMv6 && domain == 0) { 560 if ((cpu_architecture() >= CPU_ARCH_ARMv6 || cpu_is_xsc3())
561 && domain == 0) {
561 /* 562 /*
562 * Align to supersection boundary if !high pages. 563 * Align to supersection boundary if !high pages.
563 * High pages have already been checked for proper 564 * High pages have already been checked for proper
diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S
index 9a7e7c096aa9..ee6f15298735 100644
--- a/arch/arm/mm/proc-v6.S
+++ b/arch/arm/mm/proc-v6.S
@@ -21,6 +21,14 @@
21 21
22#define D_CACHE_LINE_SIZE 32 22#define D_CACHE_LINE_SIZE 32
23 23
24#define TTB_C (1 << 0)
25#define TTB_S (1 << 1)
26#define TTB_IMP (1 << 2)
27#define TTB_RGN_NC (0 << 3)
28#define TTB_RGN_WBWA (1 << 3)
29#define TTB_RGN_WT (2 << 3)
30#define TTB_RGN_WB (3 << 3)
31
24 .macro cpsie, flags 32 .macro cpsie, flags
25 .ifc \flags, f 33 .ifc \flags, f
26 .long 0xf1080040 34 .long 0xf1080040
@@ -115,7 +123,7 @@ ENTRY(cpu_v6_switch_mm)
115 mov r2, #0 123 mov r2, #0
116 ldr r1, [r1, #MM_CONTEXT_ID] @ get mm->context.id 124 ldr r1, [r1, #MM_CONTEXT_ID] @ get mm->context.id
117#ifdef CONFIG_SMP 125#ifdef CONFIG_SMP
118 orr r0, r0, #2 @ set shared pgtable 126 orr r0, r0, #TTB_RGN_WBWA|TTB_S @ mark PTWs shared, outer cacheable
119#endif 127#endif
120 mcr p15, 0, r2, c7, c5, 6 @ flush BTAC/BTB 128 mcr p15, 0, r2, c7, c5, 6 @ flush BTAC/BTB
121 mcr p15, 0, r2, c7, c10, 4 @ drain write buffer 129 mcr p15, 0, r2, c7, c10, 4 @ drain write buffer
@@ -161,8 +169,8 @@ ENTRY(cpu_v6_set_pte)
161 tst r1, #L_PTE_YOUNG 169 tst r1, #L_PTE_YOUNG
162 biceq r2, r2, #PTE_EXT_APX | PTE_EXT_AP_MASK 170 biceq r2, r2, #PTE_EXT_APX | PTE_EXT_AP_MASK
163 171
164@ tst r1, #L_PTE_EXEC 172 tst r1, #L_PTE_EXEC
165@ orreq r2, r2, #PTE_EXT_XN 173 orreq r2, r2, #PTE_EXT_XN
166 174
167 tst r1, #L_PTE_PRESENT 175 tst r1, #L_PTE_PRESENT
168 moveq r2, #0 176 moveq r2, #0
@@ -221,7 +229,7 @@ __v6_setup:
221 mcr p15, 0, r0, c8, c7, 0 @ invalidate I + D TLBs 229 mcr p15, 0, r0, c8, c7, 0 @ invalidate I + D TLBs
222 mcr p15, 0, r0, c2, c0, 2 @ TTB control register 230 mcr p15, 0, r0, c2, c0, 2 @ TTB control register
223#ifdef CONFIG_SMP 231#ifdef CONFIG_SMP
224 orr r4, r4, #2 @ set shared pgtable 232 orr r4, r4, #TTB_RGN_WBWA|TTB_S @ mark PTWs shared, outer cacheable
225#endif 233#endif
226 mcr p15, 0, r4, c2, c0, 1 @ load TTB1 234 mcr p15, 0, r4, c2, c0, 1 @ load TTB1
227#ifdef CONFIG_VFP 235#ifdef CONFIG_VFP
diff --git a/arch/arm/mm/proc-xsc3.S b/arch/arm/mm/proc-xsc3.S
new file mode 100644
index 000000000000..f90513e9af0c
--- /dev/null
+++ b/arch/arm/mm/proc-xsc3.S
@@ -0,0 +1,498 @@
1/*
2 * linux/arch/arm/mm/proc-xsc3.S
3 *
4 * Original Author: Matthew Gilbert
5 * Current Maintainer: Deepak Saxena <dsaxena@plexity.net>
6 *
7 * Copyright 2004 (C) Intel Corp.
8 * Copyright 2005 (c) MontaVista Software, Inc.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * MMU functions for the Intel XScale3 Core (XSC3). The XSC3 core is an
15 * extension to Intel's original XScale core that adds the following
16 * features:
17 *
18 * - ARMv6 Supersections
19 * - Low Locality Reference pages (replaces mini-cache)
20 * - 36-bit addressing
21 * - L2 cache
22 * - Cache-coherency if chipset supports it
23 *
24 * Based on orignal XScale code by Nicolas Pitre
25 */
26
27#include <linux/linkage.h>
28#include <linux/init.h>
29#include <asm/assembler.h>
30#include <asm/procinfo.h>
31#include <asm/hardware.h>
32#include <asm/pgtable.h>
33#include <asm/page.h>
34#include <asm/ptrace.h>
35#include "proc-macros.S"
36
37/*
38 * This is the maximum size of an area which will be flushed. If the
39 * area is larger than this, then we flush the whole cache.
40 */
41#define MAX_AREA_SIZE 32768
42
43/*
44 * The cache line size of the I and D cache.
45 */
46#define CACHELINESIZE 32
47
48/*
49 * The size of the data cache.
50 */
51#define CACHESIZE 32768
52
53/*
54 * Run with L2 enabled.
55 */
56#define L2_CACHE_ENABLE 1
57
58/*
59 * Enable the Branch Target Buffer (can cause crashes, see erratum #42.)
60 */
61#define BTB_ENABLE 0
62
63/*
64 * This macro is used to wait for a CP15 write and is needed
65 * when we have to ensure that the last operation to the co-pro
66 * was completed before continuing with operation.
67 */
68 .macro cpwait_ret, lr, rd
69 mrc p15, 0, \rd, c2, c0, 0 @ arbitrary read of cp15
70 sub pc, \lr, \rd, LSR #32 @ wait for completion and
71 @ flush instruction pipeline
72 .endm
73
74/*
75 * This macro cleans & invalidates the entire xsc3 dcache by set & way.
76 */
77
78 .macro clean_d_cache rd, rs
79 mov \rd, #0x1f00
80 orr \rd, \rd, #0x00e0
811: mcr p15, 0, \rd, c7, c14, 2 @ clean/inv set/way
82 adds \rd, \rd, #0x40000000
83 bcc 1b
84 subs \rd, \rd, #0x20
85 bpl 1b
86 .endm
87
88 .text
89
90/*
91 * cpu_xsc3_proc_init()
92 *
93 * Nothing too exciting at the moment
94 */
95ENTRY(cpu_xsc3_proc_init)
96 mov pc, lr
97
98/*
99 * cpu_xsc3_proc_fin()
100 */
101ENTRY(cpu_xsc3_proc_fin)
102 str lr, [sp, #-4]!
103 mov r0, #PSR_F_BIT|PSR_I_BIT|SVC_MODE
104 msr cpsr_c, r0
105 bl xsc3_flush_kern_cache_all @ clean caches
106 mrc p15, 0, r0, c1, c0, 0 @ ctrl register
107 bic r0, r0, #0x1800 @ ...IZ...........
108 bic r0, r0, #0x0006 @ .............CA.
109 mcr p15, 0, r0, c1, c0, 0 @ disable caches
110 ldr pc, [sp], #4
111
112/*
113 * cpu_xsc3_reset(loc)
114 *
115 * Perform a soft reset of the system. Put the CPU into the
116 * same state as it would be if it had been reset, and branch
117 * to what would be the reset vector.
118 *
119 * loc: location to jump to for soft reset
120 */
121 .align 5
122ENTRY(cpu_xsc3_reset)
123 mov r1, #PSR_F_BIT|PSR_I_BIT|SVC_MODE
124 msr cpsr_c, r1 @ reset CPSR
125 mrc p15, 0, r1, c1, c0, 0 @ ctrl register
126 bic r1, r1, #0x0086 @ ........B....CA.
127 bic r1, r1, #0x3900 @ ..VIZ..S........
128 mcr p15, 0, r1, c1, c0, 0 @ ctrl register
129 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches & BTB
130 bic r1, r1, #0x0001 @ ...............M
131 mcr p15, 0, r1, c1, c0, 0 @ ctrl register
132 @ CAUTION: MMU turned off from this point. We count on the pipeline
133 @ already containing those two last instructions to survive.
134 mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs
135 mov pc, r0
136
137/*
138 * cpu_xsc3_do_idle()
139 *
140 * Cause the processor to idle
141 *
142 * For now we do nothing but go to idle mode for every case
143 *
144 * XScale supports clock switching, but using idle mode support
145 * allows external hardware to react to system state changes.
146
147 MMG: Come back to this one.
148 */
149 .align 5
150
151ENTRY(cpu_xsc3_do_idle)
152 mov r0, #1
153 mcr p14, 0, r0, c7, c0, 0 @ Go to IDLE
154 mov pc, lr
155
156/* ================================= CACHE ================================ */
157
158/*
159 * flush_user_cache_all()
160 *
161 * Invalidate all cache entries in a particular address
162 * space.
163 */
164ENTRY(xsc3_flush_user_cache_all)
165 /* FALLTHROUGH */
166
167/*
168 * flush_kern_cache_all()
169 *
170 * Clean and invalidate the entire cache.
171 */
172ENTRY(xsc3_flush_kern_cache_all)
173 mov r2, #VM_EXEC
174 mov ip, #0
175__flush_whole_cache:
176 clean_d_cache r0, r1
177 tst r2, #VM_EXEC
178 mcrne p15, 0, ip, c7, c5, 0 @ Invalidate I cache & BTB
179 mcrne p15, 0, ip, c7, c10, 4 @ Drain Write Buffer
180 mcrne p15, 0, ip, c7, c5, 4 @ Prefetch Flush
181 mov pc, lr
182
183/*
184 * flush_user_cache_range(start, end, vm_flags)
185 *
186 * Invalidate a range of cache entries in the specified
187 * address space.
188 *
189 * - start - start address (may not be aligned)
190 * - end - end address (exclusive, may not be aligned)
191 * - vma - vma_area_struct describing address space
192 */
193 .align 5
194ENTRY(xsc3_flush_user_cache_range)
195 mov ip, #0
196 sub r3, r1, r0 @ calculate total size
197 cmp r3, #MAX_AREA_SIZE
198 bhs __flush_whole_cache
199
2001: tst r2, #VM_EXEC
201 mcrne p15, 0, r0, c7, c5, 1 @ Invalidate I cache line
202 mcr p15, 0, r0, c7, c14, 1 @ Clean/invalidate D cache line
203 add r0, r0, #CACHELINESIZE
204 cmp r0, r1
205 blo 1b
206 tst r2, #VM_EXEC
207 mcrne p15, 0, ip, c7, c5, 6 @ Invalidate BTB
208 mcrne p15, 0, ip, c7, c10, 4 @ Drain Write Buffer
209 mcrne p15, 0, ip, c7, c5, 4 @ Prefetch Flush
210 mov pc, lr
211
212/*
213 * coherent_kern_range(start, end)
214 *
215 * Ensure coherency between the Icache and the Dcache in the
216 * region described by start. If you have non-snooping
217 * Harvard caches, you need to implement this function.
218 *
219 * - start - virtual start address
220 * - end - virtual end address
221 *
222 * Note: single I-cache line invalidation isn't used here since
223 * it also trashes the mini I-cache used by JTAG debuggers.
224 */
225ENTRY(xsc3_coherent_kern_range)
226/* FALLTHROUGH */
227ENTRY(xsc3_coherent_user_range)
228 bic r0, r0, #CACHELINESIZE - 1
2291: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
230 add r0, r0, #CACHELINESIZE
231 cmp r0, r1
232 blo 1b
233 mov r0, #0
234 mcr p15, 0, r0, c7, c5, 0 @ Invalidate I cache & BTB
235 mcr p15, 0, r0, c7, c10, 4 @ Drain Write Buffer
236 mcr p15, 0, r0, c7, c5, 4 @ Prefetch Flush
237 mov pc, lr
238
239/*
240 * flush_kern_dcache_page(void *page)
241 *
242 * Ensure no D cache aliasing occurs, either with itself or
243 * the I cache
244 *
245 * - addr - page aligned address
246 */
247ENTRY(xsc3_flush_kern_dcache_page)
248 add r1, r0, #PAGE_SZ
2491: mcr p15, 0, r0, c7, c14, 1 @ Clean/Invalidate D Cache line
250 add r0, r0, #CACHELINESIZE
251 cmp r0, r1
252 blo 1b
253 mov r0, #0
254 mcr p15, 0, r0, c7, c5, 0 @ Invalidate I cache & BTB
255 mcr p15, 0, r0, c7, c10, 4 @ Drain Write Buffer
256 mcr p15, 0, r0, c7, c5, 4 @ Prefetch Flush
257 mov pc, lr
258
259/*
260 * dma_inv_range(start, end)
261 *
262 * Invalidate (discard) the specified virtual address range.
263 * May not write back any entries. If 'start' or 'end'
264 * are not cache line aligned, those lines must be written
265 * back.
266 *
267 * - start - virtual start address
268 * - end - virtual end address
269 */
270ENTRY(xsc3_dma_inv_range)
271 tst r0, #CACHELINESIZE - 1
272 bic r0, r0, #CACHELINESIZE - 1
273 mcrne p15, 0, r0, c7, c10, 1 @ clean L1 D entry
274 mcrne p15, 1, r0, c7, c11, 1 @ clean L2 D entry
275 tst r1, #CACHELINESIZE - 1
276 mcrne p15, 0, r1, c7, c10, 1 @ clean L1 D entry
277 mcrne p15, 1, r1, c7, c11, 1 @ clean L2 D entry
2781: mcr p15, 0, r0, c7, c6, 1 @ invalidate L1 D entry
279 mcr p15, 1, r0, c7, c7, 1 @ Invalidate L2 D cache line
280 add r0, r0, #CACHELINESIZE
281 cmp r0, r1
282 blo 1b
283 mcr p15, 0, r0, c7, c10, 4 @ Drain Write Buffer
284 mov pc, lr
285
286/*
287 * dma_clean_range(start, end)
288 *
289 * Clean the specified virtual address range.
290 *
291 * - start - virtual start address
292 * - end - virtual end address
293 */
294ENTRY(xsc3_dma_clean_range)
295 bic r0, r0, #CACHELINESIZE - 1
2961: mcr p15, 0, r0, c7, c10, 1 @ clean L1 D entry
297 mcr p15, 1, r0, c7, c11, 1 @ clean L2 D entry
298 add r0, r0, #CACHELINESIZE
299 cmp r0, r1
300 blo 1b
301 mcr p15, 0, r0, c7, c10, 4 @ Drain Write Buffer
302 mov pc, lr
303
304/*
305 * dma_flush_range(start, end)
306 *
307 * Clean and invalidate the specified virtual address range.
308 *
309 * - start - virtual start address
310 * - end - virtual end address
311 */
312ENTRY(xsc3_dma_flush_range)
313 bic r0, r0, #CACHELINESIZE - 1
3141: mcr p15, 0, r0, c7, c14, 1 @ Clean/invalidate L1 D cache line
315 mcr p15, 1, r0, c7, c11, 1 @ Clean L2 D cache line
316 mcr p15, 1, r0, c7, c7, 1 @ Invalidate L2 D cache line
317 add r0, r0, #CACHELINESIZE
318 cmp r0, r1
319 blo 1b
320 mcr p15, 0, r0, c7, c10, 4 @ Drain Write Buffer
321 mov pc, lr
322
323ENTRY(xsc3_cache_fns)
324 .long xsc3_flush_kern_cache_all
325 .long xsc3_flush_user_cache_all
326 .long xsc3_flush_user_cache_range
327 .long xsc3_coherent_kern_range
328 .long xsc3_coherent_user_range
329 .long xsc3_flush_kern_dcache_page
330 .long xsc3_dma_inv_range
331 .long xsc3_dma_clean_range
332 .long xsc3_dma_flush_range
333
334ENTRY(cpu_xsc3_dcache_clean_area)
3351: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
336 add r0, r0, #CACHELINESIZE
337 subs r1, r1, #CACHELINESIZE
338 bhi 1b
339 mov pc, lr
340
341/* =============================== PageTable ============================== */
342
343/*
344 * cpu_xsc3_switch_mm(pgd)
345 *
346 * Set the translation base pointer to be as described by pgd.
347 *
348 * pgd: new page tables
349 */
350 .align 5
351ENTRY(cpu_xsc3_switch_mm)
352 clean_d_cache r1, r2
353 mcr p15, 0, ip, c7, c5, 0 @ Invalidate I cache & BTB
354 mcr p15, 0, ip, c7, c10, 4 @ Drain Write Buffer
355 mcr p15, 0, ip, c7, c5, 4 @ Prefetch Flush
356#ifdef L2_CACHE_ENABLE
357 orr r0, r0, #0x18 @ cache the page table in L2
358#endif
359 mcr p15, 0, r0, c2, c0, 0 @ load page table pointer
360 mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs
361 cpwait_ret lr, ip
362
363/*
364 * cpu_xsc3_set_pte(ptep, pte)
365 *
366 * Set a PTE and flush it out
367 *
368 */
369 .align 5
370ENTRY(cpu_xsc3_set_pte)
371 str r1, [r0], #-2048 @ linux version
372
373 bic r2, r1, #0xff0
374 orr r2, r2, #PTE_TYPE_EXT @ extended page
375
376 eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
377
378 tst r3, #L_PTE_USER @ User?
379 orrne r2, r2, #PTE_EXT_AP_URO_SRW @ yes -> user r/o, system r/w
380
381 tst r3, #L_PTE_WRITE | L_PTE_DIRTY @ Write and Dirty?
382 orreq r2, r2, #PTE_EXT_AP_UNO_SRW @ yes -> user n/a, system r/w
383 @ combined with user -> user r/w
384
385#if L2_CACHE_ENABLE
386 @ If its cacheable it needs to be in L2 also.
387 eor ip, r1, #L_PTE_CACHEABLE
388 tst ip, #L_PTE_CACHEABLE
389 orreq r2, r2, #PTE_EXT_TEX(0x5)
390#endif
391
392 tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ Present and Young?
393 movne r2, #0 @ no -> fault
394
395 str r2, [r0] @ hardware version
396 mov ip, #0
397 mcr p15, 0, r0, c7, c10, 1 @ Clean D cache line mcr
398 mcr p15, 0, ip, c7, c10, 4 @ Drain Write Buffer
399 mov pc, lr
400
401 .ltorg
402
403 .align
404
405 __INIT
406
407 .type __xsc3_setup, #function
408__xsc3_setup:
409 mov r0, #PSR_F_BIT|PSR_I_BIT|SVC_MODE
410 msr cpsr_c, r0
411 mcr p15, 0, ip, c7, c7, 0 @ invalidate I, D caches & BTB
412 mcr p15, 0, ip, c7, c10, 4 @ Drain Write Buffer
413 mcr p15, 0, ip, c7, c5, 4 @ Prefetch Flush
414 mcr p15, 0, ip, c8, c7, 0 @ invalidate I, D TLBs
415#if L2_CACHE_ENABLE
416 orr r4, r4, #0x18 @ cache the page table in L2
417#endif
418 mcr p15, 0, r4, c2, c0, 0 @ load page table pointer
419 mov r0, #1 @ Allow access to CP0 and CP13
420 orr r0, r0, #1 << 13 @ Its undefined whether this
421 mcr p15, 0, r0, c15, c1, 0 @ affects USR or SVC modes
422 mrc p15, 0, r0, c1, c0, 1 @ get auxiliary control reg
423 and r0, r0, #2 @ preserve bit P bit setting
424#if L2_CACHE_ENABLE
425 orr r0, r0, #(1 << 10) @ enable L2 for LLR cache
426#endif
427 mcr p15, 0, r0, c1, c0, 1 @ set auxiliary control reg
428 mrc p15, 0, r0, c1, c0, 0 @ get control register
429 bic r0, r0, #0x0200 @ .... ..R. .... ....
430 bic r0, r0, #0x0002 @ .... .... .... ..A.
431 orr r0, r0, #0x0005 @ .... .... .... .C.M
432#if BTB_ENABLE
433 orr r0, r0, #0x3900 @ ..VI Z..S .... ....
434#else
435 orr r0, r0, #0x3100 @ ..VI ...S .... ....
436#endif
437#if L2_CACHE_ENABLE
438 orr r0, r0, #0x4000000 @ L2 enable
439#endif
440 mov pc, lr
441
442 .size __xsc3_setup, . - __xsc3_setup
443
444 __INITDATA
445
446/*
447 * Purpose : Function pointers used to access above functions - all calls
448 * come through these
449 */
450
451 .type xsc3_processor_functions, #object
452ENTRY(xsc3_processor_functions)
453 .word v5t_early_abort
454 .word cpu_xsc3_proc_init
455 .word cpu_xsc3_proc_fin
456 .word cpu_xsc3_reset
457 .word cpu_xsc3_do_idle
458 .word cpu_xsc3_dcache_clean_area
459 .word cpu_xsc3_switch_mm
460 .word cpu_xsc3_set_pte
461 .size xsc3_processor_functions, . - xsc3_processor_functions
462
463 .section ".rodata"
464
465 .type cpu_arch_name, #object
466cpu_arch_name:
467 .asciz "armv5te"
468 .size cpu_arch_name, . - cpu_arch_name
469
470 .type cpu_elf_name, #object
471cpu_elf_name:
472 .asciz "v5"
473 .size cpu_elf_name, . - cpu_elf_name
474
475 .type cpu_xsc3_name, #object
476cpu_xsc3_name:
477 .asciz "XScale-Core3"
478 .size cpu_xsc3_name, . - cpu_xsc3_name
479
480 .align
481
482 .section ".proc.info.init", #alloc, #execinstr
483
484 .type __xsc3_proc_info,#object
485__xsc3_proc_info:
486 .long 0x69056000
487 .long 0xffffe000
488 .long 0x00000c0e
489 b __xsc3_setup
490 .long cpu_arch_name
491 .long cpu_elf_name
492 .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP
493 .long cpu_xsc3_name
494 .long xsc3_processor_functions
495 .long v4wbi_tlb_fns
496 .long xsc3_mc_user_fns
497 .long xsc3_cache_fns
498 .size __xsc3_proc_info, . - __xsc3_proc_info
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 13:17:36 -0500