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authorRoman Zippel <zippel@linux-m68k.org>2005-09-03 18:57:09 -0400
committerLinus Torvalds <torvalds@evo.osdl.org>2005-09-05 03:06:19 -0400
commit2855b97020f6d4a4dfb005fb77c0b79c8cb9d13f (patch)
tree6746ded865a27cb23f1646ea2b9e10f76c9d9601
parent69f447cffb911bb2d9737fa905f6d983ec2aa5d3 (diff)
[PATCH] m68k: move cache functions into separate file
Move a few cache functions into its own file and fix flush_icache_range() so it can handle both kernel and user addresses correctly (assuming context is set correctly). Turn copy_to_user_page/copy_from_user_page into inline functions and add a missing cache flush. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat
-rw-r--r--arch/m68k/mm/Makefile2
-rw-r--r--arch/m68k/mm/cache.c118
-rw-r--r--arch/m68k/mm/memory.c104
-rw-r--r--include/asm-m68k/cacheflush.h31
4 files changed, 137 insertions, 118 deletions
diff --git a/arch/m68k/mm/Makefile b/arch/m68k/mm/Makefile
index 90f1c735c110..5eaa43c4cb3c 100644
--- a/arch/m68k/mm/Makefile
+++ b/arch/m68k/mm/Makefile
@@ -2,7 +2,7 @@
2# Makefile for the linux m68k-specific parts of the memory manager. 2# Makefile for the linux m68k-specific parts of the memory manager.
3# 3#
4 4
5obj-y := init.o fault.o hwtest.o 5obj-y := cache.o init.o fault.o hwtest.o
6 6
7obj-$(CONFIG_MMU_MOTOROLA) += kmap.o memory.o motorola.o 7obj-$(CONFIG_MMU_MOTOROLA) += kmap.o memory.o motorola.o
8obj-$(CONFIG_MMU_SUN3) += sun3kmap.o sun3mmu.o 8obj-$(CONFIG_MMU_SUN3) += sun3kmap.o sun3mmu.o
diff --git a/arch/m68k/mm/cache.c b/arch/m68k/mm/cache.c
new file mode 100644
index 000000000000..5437fff5fe07
--- /dev/null
+++ b/arch/m68k/mm/cache.c
@@ -0,0 +1,118 @@
1/*
2 * linux/arch/m68k/mm/cache.c
3 *
4 * Instruction cache handling
5 *
6 * Copyright (C) 1995 Hamish Macdonald
7 */
8
9#include <linux/module.h>
10#include <asm/pgalloc.h>
11#include <asm/traps.h>
12
13
14static unsigned long virt_to_phys_slow(unsigned long vaddr)
15{
16 if (CPU_IS_060) {
17 unsigned long paddr;
18
19 /* The PLPAR instruction causes an access error if the translation
20 * is not possible. To catch this we use the same exception mechanism
21 * as for user space accesses in <asm/uaccess.h>. */
22 asm volatile (".chip 68060\n"
23 "1: plpar (%0)\n"
24 ".chip 68k\n"
25 "2:\n"
26 ".section .fixup,\"ax\"\n"
27 " .even\n"
28 "3: sub.l %0,%0\n"
29 " jra 2b\n"
30 ".previous\n"
31 ".section __ex_table,\"a\"\n"
32 " .align 4\n"
33 " .long 1b,3b\n"
34 ".previous"
35 : "=a" (paddr)
36 : "0" (vaddr));
37 return paddr;
38 } else if (CPU_IS_040) {
39 unsigned long mmusr;
40
41 asm volatile (".chip 68040\n\t"
42 "ptestr (%1)\n\t"
43 "movec %%mmusr, %0\n\t"
44 ".chip 68k"
45 : "=r" (mmusr)
46 : "a" (vaddr));
47
48 if (mmusr & MMU_R_040)
49 return (mmusr & PAGE_MASK) | (vaddr & ~PAGE_MASK);
50 } else {
51 unsigned short mmusr;
52 unsigned long *descaddr;
53
54 asm volatile ("ptestr %3,%2@,#7,%0\n\t"
55 "pmove %%psr,%1@"
56 : "=a&" (descaddr)
57 : "a" (&mmusr), "a" (vaddr), "d" (get_fs().seg));
58 if (mmusr & (MMU_I|MMU_B|MMU_L))
59 return 0;
60 descaddr = phys_to_virt((unsigned long)descaddr);
61 switch (mmusr & MMU_NUM) {
62 case 1:
63 return (*descaddr & 0xfe000000) | (vaddr & 0x01ffffff);
64 case 2:
65 return (*descaddr & 0xfffc0000) | (vaddr & 0x0003ffff);
66 case 3:
67 return (*descaddr & PAGE_MASK) | (vaddr & ~PAGE_MASK);
68 }
69 }
70 return 0;
71}
72
73/* Push n pages at kernel virtual address and clear the icache */
74/* RZ: use cpush %bc instead of cpush %dc, cinv %ic */
75void flush_icache_range(unsigned long address, unsigned long endaddr)
76{
77
78 if (CPU_IS_040_OR_060) {
79 address &= PAGE_MASK;
80
81 do {
82 asm volatile ("nop\n\t"
83 ".chip 68040\n\t"
84 "cpushp %%bc,(%0)\n\t"
85 ".chip 68k"
86 : : "a" (virt_to_phys_slow(address)));
87 address += PAGE_SIZE;
88 } while (address < endaddr);
89 } else {
90 unsigned long tmp;
91 asm volatile ("movec %%cacr,%0\n\t"
92 "orw %1,%0\n\t"
93 "movec %0,%%cacr"
94 : "=&d" (tmp)
95 : "di" (FLUSH_I));
96 }
97}
98EXPORT_SYMBOL(flush_icache_range);
99
100void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
101 unsigned long addr, int len)
102{
103 if (CPU_IS_040_OR_060) {
104 asm volatile ("nop\n\t"
105 ".chip 68040\n\t"
106 "cpushp %%bc,(%0)\n\t"
107 ".chip 68k"
108 : : "a" (page_to_phys(page)));
109 } else {
110 unsigned long tmp;
111 asm volatile ("movec %%cacr,%0\n\t"
112 "orw %1,%0\n\t"
113 "movec %0,%%cacr"
114 : "=&d" (tmp)
115 : "di" (FLUSH_I));
116 }
117}
118
diff --git a/arch/m68k/mm/memory.c b/arch/m68k/mm/memory.c
index 1453a6013721..559942ce0e1e 100644
--- a/arch/m68k/mm/memory.c
+++ b/arch/m68k/mm/memory.c
@@ -354,110 +354,6 @@ void cache_push (unsigned long paddr, int len)
354#endif 354#endif
355} 355}
356 356
357static unsigned long virt_to_phys_slow(unsigned long vaddr)
358{
359 if (CPU_IS_060) {
360 mm_segment_t fs = get_fs();
361 unsigned long paddr;
362
363 set_fs(get_ds());
364
365 /* The PLPAR instruction causes an access error if the translation
366 * is not possible. To catch this we use the same exception mechanism
367 * as for user space accesses in <asm/uaccess.h>. */
368 asm volatile (".chip 68060\n"
369 "1: plpar (%0)\n"
370 ".chip 68k\n"
371 "2:\n"
372 ".section .fixup,\"ax\"\n"
373 " .even\n"
374 "3: sub.l %0,%0\n"
375 " jra 2b\n"
376 ".previous\n"
377 ".section __ex_table,\"a\"\n"
378 " .align 4\n"
379 " .long 1b,3b\n"
380 ".previous"
381 : "=a" (paddr)
382 : "0" (vaddr));
383 set_fs(fs);
384 return paddr;
385 } else if (CPU_IS_040) {
386 mm_segment_t fs = get_fs();
387 unsigned long mmusr;
388
389 set_fs(get_ds());
390
391 asm volatile (".chip 68040\n\t"
392 "ptestr (%1)\n\t"
393 "movec %%mmusr, %0\n\t"
394 ".chip 68k"
395 : "=r" (mmusr)
396 : "a" (vaddr));
397 set_fs(fs);
398
399 if (mmusr & MMU_R_040)
400 return (mmusr & PAGE_MASK) | (vaddr & ~PAGE_MASK);
401 } else {
402 unsigned short mmusr;
403 unsigned long *descaddr;
404
405 asm volatile ("ptestr #5,%2@,#7,%0\n\t"
406 "pmove %%psr,%1@"
407 : "=a&" (descaddr)
408 : "a" (&mmusr), "a" (vaddr));
409 if (mmusr & (MMU_I|MMU_B|MMU_L))
410 return 0;
411 descaddr = phys_to_virt((unsigned long)descaddr);
412 switch (mmusr & MMU_NUM) {
413 case 1:
414 return (*descaddr & 0xfe000000) | (vaddr & 0x01ffffff);
415 case 2:
416 return (*descaddr & 0xfffc0000) | (vaddr & 0x0003ffff);
417 case 3:
418 return (*descaddr & PAGE_MASK) | (vaddr & ~PAGE_MASK);
419 }
420 }
421 return 0;
422}
423
424/* Push n pages at kernel virtual address and clear the icache */
425/* RZ: use cpush %bc instead of cpush %dc, cinv %ic */
426void flush_icache_range(unsigned long address, unsigned long endaddr)
427{
428 if (CPU_IS_040_OR_060) {
429 address &= PAGE_MASK;
430
431 if (address >= PAGE_OFFSET && address < (unsigned long)high_memory) {
432 do {
433 asm volatile ("nop\n\t"
434 ".chip 68040\n\t"
435 "cpushp %%bc,(%0)\n\t"
436 ".chip 68k"
437 : : "a" (virt_to_phys((void *)address)));
438 address += PAGE_SIZE;
439 } while (address < endaddr);
440 } else {
441 do {
442 asm volatile ("nop\n\t"
443 ".chip 68040\n\t"
444 "cpushp %%bc,(%0)\n\t"
445 ".chip 68k"
446 : : "a" (virt_to_phys_slow(address)));
447 address += PAGE_SIZE;
448 } while (address < endaddr);
449 }
450 } else {
451 unsigned long tmp;
452 asm volatile ("movec %%cacr,%0\n\t"
453 "orw %1,%0\n\t"
454 "movec %0,%%cacr"
455 : "=&d" (tmp)
456 : "di" (FLUSH_I));
457 }
458}
459
460
461#ifndef CONFIG_SINGLE_MEMORY_CHUNK 357#ifndef CONFIG_SINGLE_MEMORY_CHUNK
462int mm_end_of_chunk (unsigned long addr, int len) 358int mm_end_of_chunk (unsigned long addr, int len)
463{ 359{
diff --git a/include/asm-m68k/cacheflush.h b/include/asm-m68k/cacheflush.h
index e4773946f10d..8aba971b1368 100644
--- a/include/asm-m68k/cacheflush.h
+++ b/include/asm-m68k/cacheflush.h
@@ -130,20 +130,25 @@ static inline void __flush_page_to_ram(void *vaddr)
130#define flush_dcache_mmap_lock(mapping) do { } while (0) 130#define flush_dcache_mmap_lock(mapping) do { } while (0)
131#define flush_dcache_mmap_unlock(mapping) do { } while (0) 131#define flush_dcache_mmap_unlock(mapping) do { } while (0)
132#define flush_icache_page(vma, page) __flush_page_to_ram(page_address(page)) 132#define flush_icache_page(vma, page) __flush_page_to_ram(page_address(page))
133#define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
134
135#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
136 do { \
137 flush_cache_page(vma, vaddr, page_to_pfn(page));\
138 memcpy(dst, src, len); \
139 } while (0)
140
141#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
142 do { \
143 flush_cache_page(vma, vaddr, page_to_pfn(page));\
144 memcpy(dst, src, len); \
145 } while (0)
146 133
134extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
135 unsigned long addr, int len);
147extern void flush_icache_range(unsigned long address, unsigned long endaddr); 136extern void flush_icache_range(unsigned long address, unsigned long endaddr);
148 137
138static inline void copy_to_user_page(struct vm_area_struct *vma,
139 struct page *page, unsigned long vaddr,
140 void *dst, void *src, int len)
141{
142 flush_cache_page(vma, vaddr, page_to_pfn(page));
143 memcpy(dst, src, len);
144 flush_icache_user_range(vma, page, vaddr, len);
145}
146static inline void copy_from_user_page(struct vm_area_struct *vma,
147 struct page *page, unsigned long vaddr,
148 void *dst, void *src, int len)
149{
150 flush_cache_page(vma, vaddr, page_to_pfn(page));
151 memcpy(dst, src, len);
152}
153
149#endif /* _M68K_CACHEFLUSH_H */ 154#endif /* _M68K_CACHEFLUSH_H */
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