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-rw-r--r--arch/microblaze/include/asm/cacheflush.h140
-rw-r--r--arch/microblaze/kernel/cpu/cache.c663
-rw-r--r--arch/microblaze/kernel/setup.c9
-rw-r--r--arch/microblaze/kernel/signal.c30
4 files changed, 574 insertions, 268 deletions
diff --git a/arch/microblaze/include/asm/cacheflush.h b/arch/microblaze/include/asm/cacheflush.h
index 1f04b9111454..a6edd356cd08 100644
--- a/arch/microblaze/include/asm/cacheflush.h
+++ b/arch/microblaze/include/asm/cacheflush.h
@@ -18,6 +18,8 @@
18/* Somebody depends on this; sigh... */ 18/* Somebody depends on this; sigh... */
19#include <linux/mm.h> 19#include <linux/mm.h>
20 20
21/* Look at Documentation/cachetlb.txt */
22
21/* 23/*
22 * Cache handling functions. 24 * Cache handling functions.
23 * Microblaze has a write-through data cache, meaning that the data cache 25 * Microblaze has a write-through data cache, meaning that the data cache
@@ -27,95 +29,81 @@
27 * instruction cache to make sure we don't fetch old, bad code. 29 * instruction cache to make sure we don't fetch old, bad code.
28 */ 30 */
29 31
32/* struct cache, d=dcache, i=icache, fl = flush, iv = invalidate,
33 * suffix r = range */
34struct scache {
35 /* icache */
36 void (*ie)(void); /* enable */
37 void (*id)(void); /* disable */
38 void (*ifl)(void); /* flush */
39 void (*iflr)(unsigned long a, unsigned long b);
40 void (*iin)(void); /* invalidate */
41 void (*iinr)(unsigned long a, unsigned long b);
42 /* dcache */
43 void (*de)(void); /* enable */
44 void (*dd)(void); /* disable */
45 void (*dfl)(void); /* flush */
46 void (*dflr)(unsigned long a, unsigned long b);
47 void (*din)(void); /* invalidate */
48 void (*dinr)(unsigned long a, unsigned long b);
49};
50
51/* microblaze cache */
52extern struct scache *mbc;
53
54void microblaze_cache_init(void);
55
56#define enable_icache() mbc->ie();
57#define disable_icache() mbc->id();
58#define flush_icache() mbc->ifl();
59#define flush_icache_range(start, end) mbc->iflr(start, end);
60#define invalidate_icache() mbc->iin();
61#define invalidate_icache_range(start, end) mbc->iinr(start, end);
62
63
64#define flush_icache_user_range(vma, pg, adr, len) flush_icache();
65#define flush_icache_page(vma, pg) do { } while (0)
66
67#define enable_dcache() mbc->de();
68#define disable_dcache() mbc->dd();
30/* FIXME for LL-temac driver */ 69/* FIXME for LL-temac driver */
31#define invalidate_dcache_range(start, end) \ 70#define invalidate_dcache() mbc->din();
32 __invalidate_dcache_range(start, end) 71#define invalidate_dcache_range(start, end) mbc->dinr(start, end);
33 72#define flush_dcache() mbc->dfl();
34#define flush_cache_all() __invalidate_cache_all() 73#define flush_dcache_range(start, end) mbc->dflr(start, end);
35#define flush_cache_mm(mm) do { } while (0)
36#define flush_cache_range(vma, start, end) __invalidate_cache_all()
37#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
38 74
39#define flush_dcache_range(start, end) __invalidate_dcache_range(start, end)
40#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 75#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
76/* D-cache aliasing problem can't happen - cache is between MMU and ram */
41#define flush_dcache_page(page) do { } while (0) 77#define flush_dcache_page(page) do { } while (0)
42#define flush_dcache_mmap_lock(mapping) do { } while (0) 78#define flush_dcache_mmap_lock(mapping) do { } while (0)
43#define flush_dcache_mmap_unlock(mapping) do { } while (0) 79#define flush_dcache_mmap_unlock(mapping) do { } while (0)
44 80
45#define flush_icache_range(start, len) __invalidate_icache_range(start, len)
46#define flush_icache_page(vma, pg) do { } while (0)
47
48#ifndef CONFIG_MMU
49# define flush_icache_user_range(start, len) do { } while (0)
50#else
51# define flush_icache_user_range(vma, pg, adr, len) __invalidate_icache_all()
52
53# define flush_page_to_ram(page) do { } while (0)
54 81
55# define flush_icache() __invalidate_icache_all() 82#define flush_cache_dup_mm(mm) do { } while (0)
56# define flush_cache_sigtramp(vaddr) \ 83#define flush_cache_vmap(start, end) do { } while (0)
57 __invalidate_icache_range(vaddr, vaddr + 8) 84#define flush_cache_vunmap(start, end) do { } while (0)
58 85#define flush_cache_mm(mm) do { } while (0)
59# define flush_dcache_mmap_lock(mapping) do { } while (0) 86#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
60# define flush_dcache_mmap_unlock(mapping) do { } while (0)
61 87
62# define flush_cache_dup_mm(mm) do { } while (0) 88/* MS: kgdb code use this macro, wrong len with FLASH */
89#if 0
90#define flush_cache_range(vma, start, len) { \
91 flush_icache_range((unsigned) (start), (unsigned) (start) + (len)); \
92 flush_dcache_range((unsigned) (start), (unsigned) (start) + (len)); \
93}
63#endif 94#endif
64 95
65#define flush_cache_vmap(start, end) do { } while (0) 96#define flush_cache_range(vma, start, len) do { } while (0)
66#define flush_cache_vunmap(start, end) do { } while (0)
67
68
69void _enable_icache(void);
70void _disable_icache(void);
71void _invalidate_icache(unsigned int addr);
72
73#define __enable_icache() _enable_icache()
74#define __disable_icache() _disable_icache()
75#define __invalidate_icache(addr) _invalidate_icache(addr)
76
77void _enable_dcache(void);
78void _disable_dcache(void);
79void _invalidate_dcache(unsigned int addr);
80
81#define __enable_dcache() _enable_dcache()
82#define __disable_dcache() _disable_dcache()
83#define __invalidate_dcache(addr) _invalidate_dcache(addr)
84
85struct page;
86struct mm_struct;
87struct vm_area_struct;
88
89/* see arch/microblaze/kernel/cache.c */
90extern void __invalidate_icache_all(void);
91extern void __invalidate_icache_range(unsigned long start, unsigned long end);
92extern void __invalidate_icache_page(struct vm_area_struct *vma,
93 struct page *page);
94extern void __invalidate_icache_user_range(struct vm_area_struct *vma,
95 struct page *page,
96 unsigned long adr, int len);
97extern void __invalidate_cache_sigtramp(unsigned long addr);
98
99extern void __invalidate_dcache_all(void);
100extern void __invalidate_dcache_range(unsigned long start, unsigned long end);
101extern void __invalidate_dcache_page(struct vm_area_struct *vma,
102 struct page *page);
103extern void __invalidate_dcache_user_range(struct vm_area_struct *vma,
104 struct page *page,
105 unsigned long adr, int len);
106
107extern inline void __invalidate_cache_all(void)
108{
109 __invalidate_icache_all();
110 __invalidate_dcache_all();
111}
112 97
113#define copy_to_user_page(vma, page, vaddr, dst, src, len) \ 98#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
114do { memcpy((dst), (src), (len)); \ 99do { \
115 flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \ 100 memcpy((dst), (src), (len)); \
101 flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
116} while (0) 102} while (0)
117 103
118#define copy_from_user_page(vma, page, vaddr, dst, src, len) \ 104#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
119 memcpy((dst), (src), (len)) 105do { \
106 memcpy((dst), (src), (len)); \
107} while (0)
120 108
121#endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */ 109#endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */
diff --git a/arch/microblaze/kernel/cpu/cache.c b/arch/microblaze/kernel/cpu/cache.c
index 538f1df6761d..d9d63831cc2f 100644
--- a/arch/microblaze/kernel/cpu/cache.c
+++ b/arch/microblaze/kernel/cpu/cache.c
@@ -3,7 +3,7 @@
3 * 3 *
4 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> 4 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
5 * Copyright (C) 2007-2009 PetaLogix 5 * Copyright (C) 2007-2009 PetaLogix
6 * Copyright (C) 2007 John Williams <john.williams@petalogix.com> 6 * Copyright (C) 2007-2009 John Williams <john.williams@petalogix.com>
7 * 7 *
8 * This file is subject to the terms and conditions of the GNU General 8 * This file is subject to the terms and conditions of the GNU General
9 * Public License. See the file COPYING in the main directory of this 9 * Public License. See the file COPYING in the main directory of this
@@ -13,243 +13,534 @@
13#include <asm/cacheflush.h> 13#include <asm/cacheflush.h>
14#include <linux/cache.h> 14#include <linux/cache.h>
15#include <asm/cpuinfo.h> 15#include <asm/cpuinfo.h>
16#include <asm/pvr.h>
16 17
17/* Exported functions */ 18static inline void __invalidate_flush_icache(unsigned int addr)
19{
20 __asm__ __volatile__ ("wic %0, r0;" \
21 : : "r" (addr));
22}
23
24static inline void __flush_dcache(unsigned int addr)
25{
26 __asm__ __volatile__ ("wdc.flush %0, r0;" \
27 : : "r" (addr));
28}
29
30static inline void __invalidate_dcache(unsigned int baseaddr,
31 unsigned int offset)
32{
33 __asm__ __volatile__ ("wdc.clear %0, %1;" \
34 : : "r" (baseaddr), "r" (offset));
35}
18 36
19void _enable_icache(void) 37static inline void __enable_icache_msr(void)
20{ 38{
21 if (cpuinfo.use_icache) { 39 __asm__ __volatile__ (" msrset r0, %0; \
22#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR 40 nop; " \
23 __asm__ __volatile__ (" \ 41 : : "i" (MSR_ICE) : "memory");
24 msrset r0, %0; \ 42}
25 nop; " \ 43
26 : \ 44static inline void __disable_icache_msr(void)
27 : "i" (MSR_ICE) \ 45{
46 __asm__ __volatile__ (" msrclr r0, %0; \
47 nop; " \
48 : : "i" (MSR_ICE) : "memory");
49}
50
51static inline void __enable_dcache_msr(void)
52{
53 __asm__ __volatile__ (" msrset r0, %0; \
54 nop; " \
55 : \
56 : "i" (MSR_DCE) \
28 : "memory"); 57 : "memory");
29#else
30 __asm__ __volatile__ (" \
31 mfs r12, rmsr; \
32 nop; \
33 ori r12, r12, %0; \
34 mts rmsr, r12; \
35 nop; " \
36 : \
37 : "i" (MSR_ICE) \
38 : "memory", "r12");
39#endif
40 }
41} 58}
42 59
43void _disable_icache(void) 60static inline void __disable_dcache_msr(void)
44{ 61{
45 if (cpuinfo.use_icache) { 62 __asm__ __volatile__ (" msrclr r0, %0; \
46#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR 63 nop; " \
47 __asm__ __volatile__ (" \ 64 : \
48 msrclr r0, %0; \ 65 : "i" (MSR_DCE) \
49 nop; " \
50 : \
51 : "i" (MSR_ICE) \
52 : "memory"); 66 : "memory");
53#else 67}
54 __asm__ __volatile__ (" \ 68
55 mfs r12, rmsr; \ 69static inline void __enable_icache_nomsr(void)
56 nop; \ 70{
57 andi r12, r12, ~%0; \ 71 __asm__ __volatile__ (" mfs r12, rmsr; \
58 mts rmsr, r12; \ 72 nop; \
59 nop; " \ 73 ori r12, r12, %0; \
60 : \ 74 mts rmsr, r12; \
61 : "i" (MSR_ICE) \ 75 nop; " \
76 : \
77 : "i" (MSR_ICE) \
62 : "memory", "r12"); 78 : "memory", "r12");
63#endif
64 }
65} 79}
66 80
67void _invalidate_icache(unsigned int addr) 81static inline void __disable_icache_nomsr(void)
68{ 82{
69 if (cpuinfo.use_icache) { 83 __asm__ __volatile__ (" mfs r12, rmsr; \
70 __asm__ __volatile__ (" \ 84 nop; \
71 wic %0, r0" \ 85 andi r12, r12, ~%0; \
72 : \ 86 mts rmsr, r12; \
73 : "r" (addr)); 87 nop; " \
74 } 88 : \
89 : "i" (MSR_ICE) \
90 : "memory", "r12");
75} 91}
76 92
77void _enable_dcache(void) 93static inline void __enable_dcache_nomsr(void)
78{ 94{
79 if (cpuinfo.use_dcache) { 95 __asm__ __volatile__ (" mfs r12, rmsr; \
80#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR 96 nop; \
81 __asm__ __volatile__ (" \ 97 ori r12, r12, %0; \
82 msrset r0, %0; \ 98 mts rmsr, r12; \
83 nop; " \ 99 nop; " \
84 : \ 100 : \
85 : "i" (MSR_DCE) \ 101 : "i" (MSR_DCE) \
86 : "memory");
87#else
88 __asm__ __volatile__ (" \
89 mfs r12, rmsr; \
90 nop; \
91 ori r12, r12, %0; \
92 mts rmsr, r12; \
93 nop; " \
94 : \
95 : "i" (MSR_DCE) \
96 : "memory", "r12"); 102 : "memory", "r12");
97#endif
98 }
99} 103}
100 104
101void _disable_dcache(void) 105static inline void __disable_dcache_nomsr(void)
102{ 106{
103#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR 107 __asm__ __volatile__ (" mfs r12, rmsr; \
104 __asm__ __volatile__ (" \ 108 nop; \
105 msrclr r0, %0; \ 109 andi r12, r12, ~%0; \
106 nop; " \ 110 mts rmsr, r12; \
107 : \ 111 nop; " \
108 : "i" (MSR_DCE) \ 112 : \
109 : "memory"); 113 : "i" (MSR_DCE) \
110#else
111 __asm__ __volatile__ (" \
112 mfs r12, rmsr; \
113 nop; \
114 andi r12, r12, ~%0; \
115 mts rmsr, r12; \
116 nop; " \
117 : \
118 : "i" (MSR_DCE) \
119 : "memory", "r12"); 114 : "memory", "r12");
120#endif
121} 115}
122 116
123void _invalidate_dcache(unsigned int addr) 117
118/* Helper macro for computing the limits of cache range loops */
119#define CACHE_LOOP_LIMITS(start, end, cache_line_length, cache_size) \
120do { \
121 int align = ~(cache_line_length - 1); \
122 end = min(start + cache_size, end); \
123 start &= align; \
124 end = ((end & align) + cache_line_length); \
125} while (0);
126
127/*
128 * Helper macro to loop over the specified cache_size/line_length and
129 * execute 'op' on that cacheline
130 */
131#define CACHE_ALL_LOOP(cache_size, line_length, op) \
132do { \
133 unsigned int len = cache_size; \
134 int step = -line_length; \
135 BUG_ON(step >= 0); \
136 \
137 __asm__ __volatile__ (" 1: " #op " %0, r0; \
138 bgtid %0, 1b; \
139 addk %0, %0, %1; \
140 " : : "r" (len), "r" (step) \
141 : "memory"); \
142} while (0);
143
144
145#define CACHE_ALL_LOOP2(cache_size, line_length, op) \
146do { \
147 unsigned int len = cache_size; \
148 int step = -line_length; \
149 BUG_ON(step >= 0); \
150 \
151 __asm__ __volatile__ (" 1: " #op " r0, %0; \
152 bgtid %0, 1b; \
153 addk %0, %0, %1; \
154 " : : "r" (len), "r" (step) \
155 : "memory"); \
156} while (0);
157
158/* for wdc.flush/clear */
159#define CACHE_RANGE_LOOP_2(start, end, line_length, op) \
160do { \
161 int step = -line_length; \
162 int count = end - start; \
163 BUG_ON(count <= 0); \
164 \
165 __asm__ __volatile__ (" 1: " #op " %0, %1; \
166 bgtid %1, 1b; \
167 addk %1, %1, %2; \
168 " : : "r" (start), "r" (count), \
169 "r" (step) : "memory"); \
170} while (0);
171
172/* It is used only first parameter for OP - for wic, wdc */
173#define CACHE_RANGE_LOOP_1(start, end, line_length, op) \
174do { \
175 int step = -line_length; \
176 int count = end - start; \
177 BUG_ON(count <= 0); \
178 \
179 __asm__ __volatile__ (" 1: addk %0, %0, %1; \
180 " #op " %0, r0; \
181 bgtid %1, 1b; \
182 addk %1, %1, %2; \
183 " : : "r" (start), "r" (count), \
184 "r" (step) : "memory"); \
185} while (0);
186
187static void __flush_icache_range_msr_irq(unsigned long start, unsigned long end)
124{ 188{
125 __asm__ __volatile__ (" \ 189 unsigned long flags;
126 wdc %0, r0" \ 190
127 : \ 191 pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
128 : "r" (addr)); 192 (unsigned int)start, (unsigned int) end);
193
194 CACHE_LOOP_LIMITS(start, end,
195 cpuinfo.icache_line_length, cpuinfo.icache_size);
196
197 local_irq_save(flags);
198 __disable_icache_msr();
199
200 CACHE_RANGE_LOOP_1(start, end, cpuinfo.icache_line_length, wic);
201
202 __enable_icache_msr();
203 local_irq_restore(flags);
129} 204}
130 205
131void __invalidate_icache_all(void) 206static void __flush_icache_range_nomsr_irq(unsigned long start,
207 unsigned long end)
132{ 208{
133 unsigned int i; 209 unsigned long flags;
134 unsigned flags;
135 210
136 if (cpuinfo.use_icache) { 211 pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
137 local_irq_save(flags); 212 (unsigned int)start, (unsigned int) end);
138 __disable_icache();
139 213
140 /* Just loop through cache size and invalidate, no need to add 214 CACHE_LOOP_LIMITS(start, end,
141 CACHE_BASE address */ 215 cpuinfo.icache_line_length, cpuinfo.icache_size);
142 for (i = 0; i < cpuinfo.icache_size;
143 i += cpuinfo.icache_line_length)
144 __invalidate_icache(i);
145 216
146 __enable_icache(); 217 local_irq_save(flags);
147 local_irq_restore(flags); 218 __disable_icache_nomsr();
148 } 219
220 CACHE_RANGE_LOOP_1(start, end, cpuinfo.icache_line_length, wic);
221
222 __enable_icache_nomsr();
223 local_irq_restore(flags);
149} 224}
150 225
151void __invalidate_icache_range(unsigned long start, unsigned long end) 226static void __flush_icache_range_noirq(unsigned long start,
227 unsigned long end)
152{ 228{
153 unsigned int i; 229 pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
154 unsigned flags; 230 (unsigned int)start, (unsigned int) end);
155 unsigned int align; 231
156 232 CACHE_LOOP_LIMITS(start, end,
157 if (cpuinfo.use_icache) { 233 cpuinfo.icache_line_length, cpuinfo.icache_size);
158 /* 234 CACHE_RANGE_LOOP_1(start, end, cpuinfo.icache_line_length, wic);
159 * No need to cover entire cache range, 235}
160 * just cover cache footprint 236
161 */ 237static void __flush_icache_all_msr_irq(void)
162 end = min(start + cpuinfo.icache_size, end); 238{
163 align = ~(cpuinfo.icache_line_length - 1); 239 unsigned long flags;
164 start &= align; /* Make sure we are aligned */ 240
165 /* Push end up to the next cache line */ 241 pr_debug("%s\n", __func__);
166 end = ((end & align) + cpuinfo.icache_line_length); 242
167 243 local_irq_save(flags);
168 local_irq_save(flags); 244 __disable_icache_msr();
169 __disable_icache(); 245
170 246 CACHE_ALL_LOOP(cpuinfo.icache_size, cpuinfo.icache_line_length, wic);
171 for (i = start; i < end; i += cpuinfo.icache_line_length) 247
172 __invalidate_icache(i); 248 __enable_icache_msr();
173 249 local_irq_restore(flags);
174 __enable_icache(); 250}
175 local_irq_restore(flags); 251
176 } 252static void __flush_icache_all_nomsr_irq(void)
253{
254 unsigned long flags;
255
256 pr_debug("%s\n", __func__);
257
258 local_irq_save(flags);
259 __disable_icache_nomsr();
260
261 CACHE_ALL_LOOP(cpuinfo.icache_size, cpuinfo.icache_line_length, wic);
262
263 __enable_icache_nomsr();
264 local_irq_restore(flags);
177} 265}
178 266
179void __invalidate_icache_page(struct vm_area_struct *vma, struct page *page) 267static void __flush_icache_all_noirq(void)
180{ 268{
181 __invalidate_icache_all(); 269 pr_debug("%s\n", __func__);
270 CACHE_ALL_LOOP(cpuinfo.icache_size, cpuinfo.icache_line_length, wic);
182} 271}
183 272
184void __invalidate_icache_user_range(struct vm_area_struct *vma, 273static void __invalidate_dcache_all_msr_irq(void)
185 struct page *page, unsigned long adr,
186 int len)
187{ 274{
188 __invalidate_icache_all(); 275 unsigned long flags;
276
277 pr_debug("%s\n", __func__);
278
279 local_irq_save(flags);
280 __disable_dcache_msr();
281
282 CACHE_ALL_LOOP(cpuinfo.dcache_size, cpuinfo.dcache_line_length, wdc);
283
284 __enable_dcache_msr();
285 local_irq_restore(flags);
189} 286}
190 287
191void __invalidate_cache_sigtramp(unsigned long addr) 288static void __invalidate_dcache_all_nomsr_irq(void)
192{ 289{
193 __invalidate_icache_range(addr, addr + 8); 290 unsigned long flags;
291
292 pr_debug("%s\n", __func__);
293
294 local_irq_save(flags);
295 __disable_dcache_nomsr();
296
297 CACHE_ALL_LOOP(cpuinfo.dcache_size, cpuinfo.dcache_line_length, wdc);
298
299 __enable_dcache_nomsr();
300 local_irq_restore(flags);
194} 301}
195 302
196void __invalidate_dcache_all(void) 303static void __invalidate_dcache_all_noirq_wt(void)
197{ 304{
198 unsigned int i; 305 pr_debug("%s\n", __func__);
199 unsigned flags; 306 CACHE_ALL_LOOP(cpuinfo.dcache_size, cpuinfo.dcache_line_length, wdc)
200
201 if (cpuinfo.use_dcache) {
202 local_irq_save(flags);
203 __disable_dcache();
204
205 /*
206 * Just loop through cache size and invalidate,
207 * no need to add CACHE_BASE address
208 */
209 for (i = 0; i < cpuinfo.dcache_size;
210 i += cpuinfo.dcache_line_length)
211 __invalidate_dcache(i);
212
213 __enable_dcache();
214 local_irq_restore(flags);
215 }
216} 307}
217 308
218void __invalidate_dcache_range(unsigned long start, unsigned long end) 309/* FIXME this is weird - should be only wdc but not work
310 * MS: I am getting bus errors and other weird things */
311static void __invalidate_dcache_all_wb(void)
219{ 312{
313 pr_debug("%s\n", __func__);
314 CACHE_ALL_LOOP2(cpuinfo.dcache_size, cpuinfo.dcache_line_length,
315 wdc.clear)
316
317#if 0
220 unsigned int i; 318 unsigned int i;
221 unsigned flags; 319
222 unsigned int align; 320 pr_debug("%s\n", __func__);
223 321
224 if (cpuinfo.use_dcache) { 322 /* Just loop through cache size and invalidate it */
225 /* 323 for (i = 0; i < cpuinfo.dcache_size; i += cpuinfo.dcache_line_length)
226 * No need to cover entire cache range, 324 __invalidate_dcache(0, i);
227 * just cover cache footprint 325#endif
228 */ 326}
229 end = min(start + cpuinfo.dcache_size, end); 327
230 align = ~(cpuinfo.dcache_line_length - 1); 328static void __invalidate_dcache_range_wb(unsigned long start,
231 start &= align; /* Make sure we are aligned */ 329 unsigned long end)
232 /* Push end up to the next cache line */ 330{
233 end = ((end & align) + cpuinfo.dcache_line_length); 331 pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
234 local_irq_save(flags); 332 (unsigned int)start, (unsigned int) end);
235 __disable_dcache(); 333
236 334 CACHE_LOOP_LIMITS(start, end,
237 for (i = start; i < end; i += cpuinfo.dcache_line_length) 335 cpuinfo.dcache_line_length, cpuinfo.dcache_size);
238 __invalidate_dcache(i); 336 CACHE_RANGE_LOOP_2(start, end, cpuinfo.dcache_line_length, wdc.clear);
239 337}
240 __enable_dcache(); 338
241 local_irq_restore(flags); 339static void __invalidate_dcache_range_nomsr_wt(unsigned long start,
242 } 340 unsigned long end)
341{
342 pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
343 (unsigned int)start, (unsigned int) end);
344 CACHE_LOOP_LIMITS(start, end,
345 cpuinfo.dcache_line_length, cpuinfo.dcache_size);
346
347 CACHE_RANGE_LOOP_1(start, end, cpuinfo.dcache_line_length, wdc);
243} 348}
244 349
245void __invalidate_dcache_page(struct vm_area_struct *vma, struct page *page) 350static void __invalidate_dcache_range_msr_irq_wt(unsigned long start,
351 unsigned long end)
246{ 352{
247 __invalidate_dcache_all(); 353 unsigned long flags;
354
355 pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
356 (unsigned int)start, (unsigned int) end);
357 CACHE_LOOP_LIMITS(start, end,
358 cpuinfo.dcache_line_length, cpuinfo.dcache_size);
359
360 local_irq_save(flags);
361 __disable_dcache_msr();
362
363 CACHE_RANGE_LOOP_1(start, end, cpuinfo.dcache_line_length, wdc);
364
365 __enable_dcache_msr();
366 local_irq_restore(flags);
367}
368
369static void __invalidate_dcache_range_nomsr_irq(unsigned long start,
370 unsigned long end)
371{
372 unsigned long flags;
373
374 pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
375 (unsigned int)start, (unsigned int) end);
376
377 CACHE_LOOP_LIMITS(start, end,
378 cpuinfo.dcache_line_length, cpuinfo.dcache_size);
379
380 local_irq_save(flags);
381 __disable_dcache_nomsr();
382
383 CACHE_RANGE_LOOP_1(start, end, cpuinfo.dcache_line_length, wdc);
384
385 __enable_dcache_nomsr();
386 local_irq_restore(flags);
387}
388
389static void __flush_dcache_all_wb(void)
390{
391 pr_debug("%s\n", __func__);
392 CACHE_ALL_LOOP(cpuinfo.dcache_size, cpuinfo.dcache_line_length,
393 wdc.flush);
248} 394}
249 395
250void __invalidate_dcache_user_range(struct vm_area_struct *vma, 396static void __flush_dcache_range_wb(unsigned long start, unsigned long end)
251 struct page *page, unsigned long adr,
252 int len)
253{ 397{
254 __invalidate_dcache_all(); 398 pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
399 (unsigned int)start, (unsigned int) end);
400
401 CACHE_LOOP_LIMITS(start, end,
402 cpuinfo.dcache_line_length, cpuinfo.dcache_size);
403 CACHE_RANGE_LOOP_2(start, end, cpuinfo.dcache_line_length, wdc.flush);
404}
405
406/* struct for wb caches and for wt caches */
407struct scache *mbc;
408
409/* new wb cache model */
410const struct scache wb_msr = {
411 .ie = __enable_icache_msr,
412 .id = __disable_icache_msr,
413 .ifl = __flush_icache_all_noirq,
414 .iflr = __flush_icache_range_noirq,
415 .iin = __flush_icache_all_noirq,
416 .iinr = __flush_icache_range_noirq,
417 .de = __enable_dcache_msr,
418 .dd = __disable_dcache_msr,
419 .dfl = __flush_dcache_all_wb,
420 .dflr = __flush_dcache_range_wb,
421 .din = __invalidate_dcache_all_wb,
422 .dinr = __invalidate_dcache_range_wb,
423};
424
425/* There is only difference in ie, id, de, dd functions */
426const struct scache wb_nomsr = {
427 .ie = __enable_icache_nomsr,
428 .id = __disable_icache_nomsr,
429 .ifl = __flush_icache_all_noirq,
430 .iflr = __flush_icache_range_noirq,
431 .iin = __flush_icache_all_noirq,
432 .iinr = __flush_icache_range_noirq,
433 .de = __enable_dcache_nomsr,
434 .dd = __disable_dcache_nomsr,
435 .dfl = __flush_dcache_all_wb,
436 .dflr = __flush_dcache_range_wb,
437 .din = __invalidate_dcache_all_wb,
438 .dinr = __invalidate_dcache_range_wb,
439};
440
441/* Old wt cache model with disabling irq and turn off cache */
442const struct scache wt_msr = {
443 .ie = __enable_icache_msr,
444 .id = __disable_icache_msr,
445 .ifl = __flush_icache_all_msr_irq,
446 .iflr = __flush_icache_range_msr_irq,
447 .iin = __flush_icache_all_msr_irq,
448 .iinr = __flush_icache_range_msr_irq,
449 .de = __enable_dcache_msr,
450 .dd = __disable_dcache_msr,
451 .dfl = __invalidate_dcache_all_msr_irq,
452 .dflr = __invalidate_dcache_range_msr_irq_wt,
453 .din = __invalidate_dcache_all_msr_irq,
454 .dinr = __invalidate_dcache_range_msr_irq_wt,
455};
456
457const struct scache wt_nomsr = {
458 .ie = __enable_icache_nomsr,
459 .id = __disable_icache_nomsr,
460 .ifl = __flush_icache_all_nomsr_irq,
461 .iflr = __flush_icache_range_nomsr_irq,
462 .iin = __flush_icache_all_nomsr_irq,
463 .iinr = __flush_icache_range_nomsr_irq,
464 .de = __enable_dcache_nomsr,
465 .dd = __disable_dcache_nomsr,
466 .dfl = __invalidate_dcache_all_nomsr_irq,
467 .dflr = __invalidate_dcache_range_nomsr_irq,
468 .din = __invalidate_dcache_all_nomsr_irq,
469 .dinr = __invalidate_dcache_range_nomsr_irq,
470};
471
472/* New wt cache model for newer Microblaze versions */
473const struct scache wt_msr_noirq = {
474 .ie = __enable_icache_msr,
475 .id = __disable_icache_msr,
476 .ifl = __flush_icache_all_noirq,
477 .iflr = __flush_icache_range_noirq,
478 .iin = __flush_icache_all_noirq,
479 .iinr = __flush_icache_range_noirq,
480 .de = __enable_dcache_msr,
481 .dd = __disable_dcache_msr,
482 .dfl = __invalidate_dcache_all_noirq_wt,
483 .dflr = __invalidate_dcache_range_nomsr_wt,
484 .din = __invalidate_dcache_all_noirq_wt,
485 .dinr = __invalidate_dcache_range_nomsr_wt,
486};
487
488const struct scache wt_nomsr_noirq = {
489 .ie = __enable_icache_nomsr,
490 .id = __disable_icache_nomsr,
491 .ifl = __flush_icache_all_noirq,
492 .iflr = __flush_icache_range_noirq,
493 .iin = __flush_icache_all_noirq,
494 .iinr = __flush_icache_range_noirq,
495 .de = __enable_dcache_nomsr,
496 .dd = __disable_dcache_nomsr,
497 .dfl = __invalidate_dcache_all_noirq_wt,
498 .dflr = __invalidate_dcache_range_nomsr_wt,
499 .din = __invalidate_dcache_all_noirq_wt,
500 .dinr = __invalidate_dcache_range_nomsr_wt,
501};
502
503/* CPU version code for 7.20.c - see arch/microblaze/kernel/cpu/cpuinfo.c */
504#define CPUVER_7_20_A 0x0c
505#define CPUVER_7_20_D 0x0f
506
507#define INFO(s) printk(KERN_INFO "cache: " s " \n");
508
509void microblaze_cache_init(void)
510{
511 if (cpuinfo.use_instr & PVR2_USE_MSR_INSTR) {
512 if (cpuinfo.dcache_wb) {
513 INFO("wb_msr");
514 mbc = (struct scache *)&wb_msr;
515 if (cpuinfo.ver_code < CPUVER_7_20_D) {
516 /* MS: problem with signal handling - hw bug */
517 INFO("WB won't work properly");
518 }
519 } else {
520 if (cpuinfo.ver_code >= CPUVER_7_20_A) {
521 INFO("wt_msr_noirq");
522 mbc = (struct scache *)&wt_msr_noirq;
523 } else {
524 INFO("wt_msr");
525 mbc = (struct scache *)&wt_msr;
526 }
527 }
528 } else {
529 if (cpuinfo.dcache_wb) {
530 INFO("wb_nomsr");
531 mbc = (struct scache *)&wb_nomsr;
532 if (cpuinfo.ver_code < CPUVER_7_20_D) {
533 /* MS: problem with signal handling - hw bug */
534 INFO("WB won't work properly");
535 }
536 } else {
537 if (cpuinfo.ver_code >= CPUVER_7_20_A) {
538 INFO("wt_nomsr_noirq");
539 mbc = (struct scache *)&wt_nomsr_noirq;
540 } else {
541 INFO("wt_nomsr");
542 mbc = (struct scache *)&wt_nomsr;
543 }
544 }
545 }
255} 546}
diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c
index 1c3f18ba8af1..5372b24ad049 100644
--- a/arch/microblaze/kernel/setup.c
+++ b/arch/microblaze/kernel/setup.c
@@ -52,11 +52,12 @@ void __init setup_arch(char **cmdline_p)
52 /* irq_early_init(); */ 52 /* irq_early_init(); */
53 setup_cpuinfo(); 53 setup_cpuinfo();
54 54
55 __invalidate_icache_all(); 55 microblaze_cache_init();
56 __enable_icache();
57 56
58 __invalidate_dcache_all(); 57 enable_dcache();
59 __enable_dcache(); 58
59 invalidate_icache();
60 enable_icache();
60 61
61 setup_memory(); 62 setup_memory();
62 63
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index 0c96ac34c316..6de3db04b1a4 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -176,6 +176,11 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
176 struct rt_sigframe __user *frame; 176 struct rt_sigframe __user *frame;
177 int err = 0; 177 int err = 0;
178 int signal; 178 int signal;
179 unsigned long address = 0;
180#ifdef CONFIG_MMU
181 pmd_t *pmdp;
182 pte_t *ptep;
183#endif
179 184
180 frame = get_sigframe(ka, regs, sizeof(*frame)); 185 frame = get_sigframe(ka, regs, sizeof(*frame));
181 186
@@ -216,8 +221,29 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
216 Negative 8 offset because return is rtsd r15, 8 */ 221 Negative 8 offset because return is rtsd r15, 8 */
217 regs->r15 = ((unsigned long)frame->tramp)-8; 222 regs->r15 = ((unsigned long)frame->tramp)-8;
218 223
219 __invalidate_cache_sigtramp((unsigned long)frame->tramp); 224 address = ((unsigned long)frame->tramp);
220 225#ifdef CONFIG_MMU
226 pmdp = pmd_offset(pud_offset(
227 pgd_offset(current->mm, address),
228 address), address);
229
230 preempt_disable();
231 ptep = pte_offset_map(pmdp, address);
232 if (pte_present(*ptep)) {
233 address = (unsigned long) page_address(pte_page(*ptep));
234 /* MS: I need add offset in page */
235 address += ((unsigned long)frame->tramp) & ~PAGE_MASK;
236 /* MS address is virtual */
237 address = virt_to_phys(address);
238 invalidate_icache_range(address, address + 8);
239 flush_dcache_range(address, address + 8);
240 }
241 pte_unmap(ptep);
242 preempt_enable();
243#else
244 flush_icache_range(address, address + 8);
245 flush_dcache_range(address, address + 8);
246#endif
221 if (err) 247 if (err)
222 goto give_sigsegv; 248 goto give_sigsegv;
223 249
generated by cgit v1.2.2 (git 2.25.0) at 2026-02-20 10:31:58 -0500