2 * arch/arm/include/asm/tlbflush.h
4 * Copyright (C) 1999-2003 Russell King
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.
10 #ifndef _ASMARM_TLBFLUSH_H
11 #define _ASMARM_TLBFLUSH_H
16 #define tlb_flush(tlb) ((void) tlb)
18 #else /* CONFIG_MMU */
22 #define TLB_V3_PAGE (1 << 0)
23 #define TLB_V4_U_PAGE (1 << 1)
24 #define TLB_V4_D_PAGE (1 << 2)
25 #define TLB_V4_I_PAGE (1 << 3)
26 #define TLB_V6_U_PAGE (1 << 4)
27 #define TLB_V6_D_PAGE (1 << 5)
28 #define TLB_V6_I_PAGE (1 << 6)
30 #define TLB_V3_FULL (1 << 8)
31 #define TLB_V4_U_FULL (1 << 9)
32 #define TLB_V4_D_FULL (1 << 10)
33 #define TLB_V4_I_FULL (1 << 11)
34 #define TLB_V6_U_FULL (1 << 12)
35 #define TLB_V6_D_FULL (1 << 13)
36 #define TLB_V6_I_FULL (1 << 14)
38 #define TLB_V6_U_ASID (1 << 16)
39 #define TLB_V6_D_ASID (1 << 17)
40 #define TLB_V6_I_ASID (1 << 18)
42 #define TLB_BTB (1 << 28)
43 #define TLB_L2CLEAN_FR (1 << 29) /* Feroceon */
44 #define TLB_DCLEAN (1 << 30)
45 #define TLB_WB (1 << 31)
51 * We have the following to choose from:
53 * v4 - ARMv4 without write buffer
54 * v4wb - ARMv4 with write buffer without I TLB flush entry instruction
55 * v4wbi - ARMv4 with write buffer with I TLB flush entry instruction
56 * fr - Feroceon (v4wbi with non-outer-cacheable page table walks)
57 * v6wbi - ARMv6 with write buffer with I TLB flush entry instruction
58 * v7wbi - identical to v6wbi
63 #define v3_tlb_flags (TLB_V3_FULL | TLB_V3_PAGE)
65 #ifdef CONFIG_CPU_TLB_V3
66 # define v3_possible_flags v3_tlb_flags
67 # define v3_always_flags v3_tlb_flags
74 # define v3_possible_flags 0
75 # define v3_always_flags (-1UL)
78 #define v4_tlb_flags (TLB_V4_U_FULL | TLB_V4_U_PAGE)
80 #ifdef CONFIG_CPU_TLB_V4WT
81 # define v4_possible_flags v4_tlb_flags
82 # define v4_always_flags v4_tlb_flags
89 # define v4_possible_flags 0
90 # define v4_always_flags (-1UL)
93 #define v4wbi_tlb_flags (TLB_WB | TLB_DCLEAN | \
94 TLB_V4_I_FULL | TLB_V4_D_FULL | \
95 TLB_V4_I_PAGE | TLB_V4_D_PAGE)
97 #ifdef CONFIG_CPU_TLB_V4WBI
98 # define v4wbi_possible_flags v4wbi_tlb_flags
99 # define v4wbi_always_flags v4wbi_tlb_flags
106 # define v4wbi_possible_flags 0
107 # define v4wbi_always_flags (-1UL)
110 #define fr_tlb_flags (TLB_WB | TLB_DCLEAN | TLB_L2CLEAN_FR | \
111 TLB_V4_I_FULL | TLB_V4_D_FULL | \
112 TLB_V4_I_PAGE | TLB_V4_D_PAGE)
114 #ifdef CONFIG_CPU_TLB_FEROCEON
115 # define fr_possible_flags fr_tlb_flags
116 # define fr_always_flags fr_tlb_flags
123 # define fr_possible_flags 0
124 # define fr_always_flags (-1UL)
127 #define v4wb_tlb_flags (TLB_WB | TLB_DCLEAN | \
128 TLB_V4_I_FULL | TLB_V4_D_FULL | \
131 #ifdef CONFIG_CPU_TLB_V4WB
132 # define v4wb_possible_flags v4wb_tlb_flags
133 # define v4wb_always_flags v4wb_tlb_flags
140 # define v4wb_possible_flags 0
141 # define v4wb_always_flags (-1UL)
144 #define v6wbi_tlb_flags (TLB_WB | TLB_DCLEAN | TLB_BTB | \
145 TLB_V6_I_FULL | TLB_V6_D_FULL | \
146 TLB_V6_I_PAGE | TLB_V6_D_PAGE | \
147 TLB_V6_I_ASID | TLB_V6_D_ASID)
149 #ifdef CONFIG_CPU_TLB_V6
150 # define v6wbi_possible_flags v6wbi_tlb_flags
151 # define v6wbi_always_flags v6wbi_tlb_flags
158 # define v6wbi_possible_flags 0
159 # define v6wbi_always_flags (-1UL)
162 #ifdef CONFIG_CPU_TLB_V7
163 # define v7wbi_possible_flags v6wbi_tlb_flags
164 # define v7wbi_always_flags v6wbi_tlb_flags
171 # define v7wbi_possible_flags 0
172 # define v7wbi_always_flags (-1UL)
176 #error Unknown TLB model
181 #include <linux/sched.h>
184 void (*flush_user_range)(unsigned long, unsigned long, struct vm_area_struct *);
185 void (*flush_kern_range)(unsigned long, unsigned long);
186 unsigned long tlb_flags;
190 * Select the calling method
194 #define __cpu_flush_user_tlb_range cpu_tlb.flush_user_range
195 #define __cpu_flush_kern_tlb_range cpu_tlb.flush_kern_range
199 #define __cpu_flush_user_tlb_range __glue(_TLB,_flush_user_tlb_range)
200 #define __cpu_flush_kern_tlb_range __glue(_TLB,_flush_kern_tlb_range)
202 extern void __cpu_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
203 extern void __cpu_flush_kern_tlb_range(unsigned long, unsigned long);
207 extern struct cpu_tlb_fns cpu_tlb;
209 #define __cpu_tlb_flags cpu_tlb.tlb_flags
215 * The arch/arm/mm/tlb-*.S files implement these methods.
217 * The TLB specific code is expected to perform whatever tests it
218 * needs to determine if it should invalidate the TLB for each
219 * call. Start addresses are inclusive and end addresses are
220 * exclusive; it is safe to round these addresses down.
224 * Invalidate the entire TLB.
228 * Invalidate all TLB entries in a particular address
230 * - mm - mm_struct describing address space
232 * flush_tlb_range(mm,start,end)
234 * Invalidate a range of TLB entries in the specified
236 * - mm - mm_struct describing address space
237 * - start - start address (may not be aligned)
238 * - end - end address (exclusive, may not be aligned)
240 * flush_tlb_page(vaddr,vma)
242 * Invalidate the specified page in the specified address range.
243 * - vaddr - virtual address (may not be aligned)
244 * - vma - vma_struct describing address range
246 * flush_kern_tlb_page(kaddr)
248 * Invalidate the TLB entry for the specified page. The address
249 * will be in the kernels virtual memory space. Current uses
250 * only require the D-TLB to be invalidated.
251 * - kaddr - Kernel virtual memory address
255 * We optimise the code below by:
256 * - building a set of TLB flags that might be set in __cpu_tlb_flags
257 * - building a set of TLB flags that will always be set in __cpu_tlb_flags
258 * - if we're going to need __cpu_tlb_flags, access it once and only once
260 * This allows us to build optimal assembly for the single-CPU type case,
261 * and as close to optimal given the compiler constrants for multi-CPU
262 * case. We could do better for the multi-CPU case if the compiler
263 * implemented the "%?" method, but this has been discontinued due to too
264 * many people getting it wrong.
266 #define possible_tlb_flags (v3_possible_flags | \
267 v4_possible_flags | \
268 v4wbi_possible_flags | \
269 fr_possible_flags | \
270 v4wb_possible_flags | \
271 v6wbi_possible_flags | \
272 v7wbi_possible_flags)
274 #define always_tlb_flags (v3_always_flags & \
276 v4wbi_always_flags & \
278 v4wb_always_flags & \
279 v6wbi_always_flags & \
282 #define tlb_flag(f) ((always_tlb_flags & (f)) || (__tlb_flag & possible_tlb_flags & (f)))
284 static inline void local_flush_tlb_all(void)
287 const unsigned int __tlb_flag = __cpu_tlb_flags;
289 if (tlb_flag(TLB_WB))
292 if (tlb_flag(TLB_V3_FULL))
293 asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (zero) : "cc");
294 if (tlb_flag(TLB_V4_U_FULL | TLB_V6_U_FULL))
295 asm("mcr p15, 0, %0, c8, c7, 0" : : "r" (zero) : "cc");
296 if (tlb_flag(TLB_V4_D_FULL | TLB_V6_D_FULL))
297 asm("mcr p15, 0, %0, c8, c6, 0" : : "r" (zero) : "cc");
298 if (tlb_flag(TLB_V4_I_FULL | TLB_V6_I_FULL))
299 asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc");
301 if (tlb_flag(TLB_BTB)) {
302 /* flush the branch target cache */
303 asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc");
309 static inline void local_flush_tlb_mm(struct mm_struct *mm)
312 const int asid = ASID(mm);
313 const unsigned int __tlb_flag = __cpu_tlb_flags;
315 if (tlb_flag(TLB_WB))
318 if (cpu_isset(smp_processor_id(), mm->cpu_vm_mask)) {
319 if (tlb_flag(TLB_V3_FULL))
320 asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (zero) : "cc");
321 if (tlb_flag(TLB_V4_U_FULL))
322 asm("mcr p15, 0, %0, c8, c7, 0" : : "r" (zero) : "cc");
323 if (tlb_flag(TLB_V4_D_FULL))
324 asm("mcr p15, 0, %0, c8, c6, 0" : : "r" (zero) : "cc");
325 if (tlb_flag(TLB_V4_I_FULL))
326 asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc");
329 if (tlb_flag(TLB_V6_U_ASID))
330 asm("mcr p15, 0, %0, c8, c7, 2" : : "r" (asid) : "cc");
331 if (tlb_flag(TLB_V6_D_ASID))
332 asm("mcr p15, 0, %0, c8, c6, 2" : : "r" (asid) : "cc");
333 if (tlb_flag(TLB_V6_I_ASID))
334 asm("mcr p15, 0, %0, c8, c5, 2" : : "r" (asid) : "cc");
336 if (tlb_flag(TLB_BTB)) {
337 /* flush the branch target cache */
338 asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc");
344 local_flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
347 const unsigned int __tlb_flag = __cpu_tlb_flags;
349 uaddr = (uaddr & PAGE_MASK) | ASID(vma->vm_mm);
351 if (tlb_flag(TLB_WB))
354 if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) {
355 if (tlb_flag(TLB_V3_PAGE))
356 asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (uaddr) : "cc");
357 if (tlb_flag(TLB_V4_U_PAGE))
358 asm("mcr p15, 0, %0, c8, c7, 1" : : "r" (uaddr) : "cc");
359 if (tlb_flag(TLB_V4_D_PAGE))
360 asm("mcr p15, 0, %0, c8, c6, 1" : : "r" (uaddr) : "cc");
361 if (tlb_flag(TLB_V4_I_PAGE))
362 asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (uaddr) : "cc");
363 if (!tlb_flag(TLB_V4_I_PAGE) && tlb_flag(TLB_V4_I_FULL))
364 asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc");
367 if (tlb_flag(TLB_V6_U_PAGE))
368 asm("mcr p15, 0, %0, c8, c7, 1" : : "r" (uaddr) : "cc");
369 if (tlb_flag(TLB_V6_D_PAGE))
370 asm("mcr p15, 0, %0, c8, c6, 1" : : "r" (uaddr) : "cc");
371 if (tlb_flag(TLB_V6_I_PAGE))
372 asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (uaddr) : "cc");
374 if (tlb_flag(TLB_BTB)) {
375 /* flush the branch target cache */
376 asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc");
381 static inline void local_flush_tlb_kernel_page(unsigned long kaddr)
384 const unsigned int __tlb_flag = __cpu_tlb_flags;
388 if (tlb_flag(TLB_WB))
391 if (tlb_flag(TLB_V3_PAGE))
392 asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (kaddr) : "cc");
393 if (tlb_flag(TLB_V4_U_PAGE))
394 asm("mcr p15, 0, %0, c8, c7, 1" : : "r" (kaddr) : "cc");
395 if (tlb_flag(TLB_V4_D_PAGE))
396 asm("mcr p15, 0, %0, c8, c6, 1" : : "r" (kaddr) : "cc");
397 if (tlb_flag(TLB_V4_I_PAGE))
398 asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (kaddr) : "cc");
399 if (!tlb_flag(TLB_V4_I_PAGE) && tlb_flag(TLB_V4_I_FULL))
400 asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc");
402 if (tlb_flag(TLB_V6_U_PAGE))
403 asm("mcr p15, 0, %0, c8, c7, 1" : : "r" (kaddr) : "cc");
404 if (tlb_flag(TLB_V6_D_PAGE))
405 asm("mcr p15, 0, %0, c8, c6, 1" : : "r" (kaddr) : "cc");
406 if (tlb_flag(TLB_V6_I_PAGE))
407 asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (kaddr) : "cc");
409 if (tlb_flag(TLB_BTB)) {
410 /* flush the branch target cache */
411 asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc");
420 * Flush a PMD entry (word aligned, or double-word aligned) to
421 * RAM if the TLB for the CPU we are running on requires this.
422 * This is typically used when we are creating PMD entries.
426 * Clean (but don't drain the write buffer) if the CPU requires
427 * these operations. This is typically used when we are removing
430 static inline void flush_pmd_entry(pmd_t *pmd)
432 const unsigned int __tlb_flag = __cpu_tlb_flags;
434 if (tlb_flag(TLB_DCLEAN))
435 asm("mcr p15, 0, %0, c7, c10, 1 @ flush_pmd"
436 : : "r" (pmd) : "cc");
438 if (tlb_flag(TLB_L2CLEAN_FR))
439 asm("mcr p15, 1, %0, c15, c9, 1 @ L2 flush_pmd"
440 : : "r" (pmd) : "cc");
442 if (tlb_flag(TLB_WB))
446 static inline void clean_pmd_entry(pmd_t *pmd)
448 const unsigned int __tlb_flag = __cpu_tlb_flags;
450 if (tlb_flag(TLB_DCLEAN))
451 asm("mcr p15, 0, %0, c7, c10, 1 @ flush_pmd"
452 : : "r" (pmd) : "cc");
454 if (tlb_flag(TLB_L2CLEAN_FR))
455 asm("mcr p15, 1, %0, c15, c9, 1 @ L2 flush_pmd"
456 : : "r" (pmd) : "cc");
460 #undef always_tlb_flags
461 #undef possible_tlb_flags
464 * Convert calls to our calling convention.
466 #define local_flush_tlb_range(vma,start,end) __cpu_flush_user_tlb_range(start,end,vma)
467 #define local_flush_tlb_kernel_range(s,e) __cpu_flush_kern_tlb_range(s,e)
470 #define flush_tlb_all local_flush_tlb_all
471 #define flush_tlb_mm local_flush_tlb_mm
472 #define flush_tlb_page local_flush_tlb_page
473 #define flush_tlb_kernel_page local_flush_tlb_kernel_page
474 #define flush_tlb_range local_flush_tlb_range
475 #define flush_tlb_kernel_range local_flush_tlb_kernel_range
477 extern void flush_tlb_all(void);
478 extern void flush_tlb_mm(struct mm_struct *mm);
479 extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr);
480 extern void flush_tlb_kernel_page(unsigned long kaddr);
481 extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
482 extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
486 * if PG_dcache_dirty is set for the page, we need to ensure that any
487 * cache entries for the kernels virtual memory range are written
490 extern void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr, pte_t pte);
494 #endif /* CONFIG_MMU */