2 * We need constants.h for:
7 #include <asm/asm-offsets.h>
8 #include <asm/thread_info.h>
11 * vma_vm_mm - get mm pointer from vma pointer (vma->vm_mm)
13 .macro vma_vm_mm, rd, rn
14 ldr \rd, [\rn, #VMA_VM_MM]
18 * vma_vm_flags - get vma->vm_flags
20 .macro vma_vm_flags, rd, rn
21 ldr \rd, [\rn, #VMA_VM_FLAGS]
25 ldr \rd, [\rn, #TI_TASK]
26 ldr \rd, [\rd, #TSK_ACTIVE_MM]
30 * act_mm - get current->active_mm
35 ldr \rd, [\rd, #TI_TASK]
36 ldr \rd, [\rd, #TSK_ACTIVE_MM]
40 * mmid - get context id from mm pointer (mm->context.id)
41 * note, this field is 64bit, so in big-endian the two words are swapped too.
45 ldr \rd, [\rn, #MM_CONTEXT_ID + 4 ]
47 ldr \rd, [\rn, #MM_CONTEXT_ID]
52 * mask_asid - mask the ASID from the context ID
58 .macro crval, clear, mmuset, ucset
69 * dcache_line_size - get the minimum D-cache line size from the CTR register
72 .macro dcache_line_size, reg, tmp
73 mrc p15, 0, \tmp, c0, c0, 1 @ read ctr
75 and \tmp, \tmp, #0xf @ cache line size encoding
76 mov \reg, #4 @ bytes per word
77 mov \reg, \reg, lsl \tmp @ actual cache line size
81 * icache_line_size - get the minimum I-cache line size from the CTR register
84 .macro icache_line_size, reg, tmp
85 mrc p15, 0, \tmp, c0, c0, 1 @ read ctr
86 and \tmp, \tmp, #0xf @ cache line size encoding
87 mov \reg, #4 @ bytes per word
88 mov \reg, \reg, lsl \tmp @ actual cache line size
92 * Sanity check the PTE configuration for the code below - which makes
93 * certain assumptions about how these bits are laid out.
96 #if L_PTE_SHARED != PTE_EXT_SHARED
97 #error PTE shared bit mismatch
99 #if !defined (CONFIG_ARM_LPAE) && \
100 (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\
101 L_PTE_PRESENT) > L_PTE_SHARED
102 #error Invalid Linux PTE bit settings
104 #endif /* CONFIG_MMU */
107 * The ARMv6 and ARMv7 set_pte_ext translation function.
109 * Permission translation:
110 * YUWD APX AP1 AP0 SVC User
111 * 0xxx 0 0 0 no acc no acc
112 * 100x 1 0 1 r/o no acc
113 * 10x0 1 0 1 r/o no acc
114 * 1011 0 0 1 r/w no acc
119 .macro armv6_mt_table pfx
121 .long 0x00 @ L_PTE_MT_UNCACHED
122 .long PTE_EXT_TEX(1) @ L_PTE_MT_BUFFERABLE
123 .long PTE_CACHEABLE @ L_PTE_MT_WRITETHROUGH
124 .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEBACK
125 .long PTE_BUFFERABLE @ L_PTE_MT_DEV_SHARED
127 .long 0x00 @ L_PTE_MT_MINICACHE (not present)
128 .long PTE_EXT_TEX(1) | PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEALLOC
130 .long PTE_EXT_TEX(1) @ L_PTE_MT_DEV_WC
132 .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_DEV_CACHED
133 .long PTE_EXT_TEX(2) @ L_PTE_MT_DEV_NONSHARED
136 .long PTE_CACHEABLE | PTE_BUFFERABLE | PTE_EXT_APX @ L_PTE_MT_VECTORS
139 .macro armv6_set_pte_ext pfx
140 str r1, [r0], #2048 @ linux version
142 bic r3, r1, #0x000003fc
143 bic r3, r3, #PTE_TYPE_MASK
145 orr r3, r3, #PTE_EXT_AP0 | 2
147 adr ip, \pfx\()_mt_table
148 and r2, r1, #L_PTE_MT_MASK
151 eor r1, r1, #L_PTE_DIRTY
152 tst r1, #L_PTE_DIRTY|L_PTE_RDONLY
153 orrne r3, r3, #PTE_EXT_APX
156 orrne r3, r3, #PTE_EXT_AP1
157 tstne r3, #PTE_EXT_APX
159 @ user read-only -> kernel read-only
160 bicne r3, r3, #PTE_EXT_AP0
163 orrne r3, r3, #PTE_EXT_XN
168 tstne r1, #L_PTE_PRESENT
170 tstne r1, #L_PTE_NONE
174 mcr p15, 0, r0, c7, c10, 1 @ flush_pte
179 * The ARMv3, ARMv4 and ARMv5 set_pte_ext translation function,
180 * covering most CPUs except Xscale and Xscale 3.
182 * Permission translation:
184 * 0xxx 0x00 no acc no acc
185 * 100x 0x00 r/o no acc
186 * 10x0 0x00 r/o no acc
187 * 1011 0x55 r/w no acc
192 .macro armv3_set_pte_ext wc_disable=1
193 str r1, [r0], #2048 @ linux version
195 eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY
197 bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits
198 bic r2, r2, #PTE_TYPE_MASK
199 orr r2, r2, #PTE_TYPE_SMALL
201 tst r3, #L_PTE_USER @ user?
202 orrne r2, r2, #PTE_SMALL_AP_URO_SRW
204 tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty?
205 orreq r2, r2, #PTE_SMALL_AP_UNO_SRW
207 tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ present and young?
211 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
212 tst r2, #PTE_CACHEABLE
213 bicne r2, r2, #PTE_BUFFERABLE
216 str r2, [r0] @ hardware version
221 * Xscale set_pte_ext translation, split into two halves to cope
222 * with work-arounds. r3 must be preserved by code between these
225 * Permission translation:
227 * 0xxx 00 no acc no acc
235 .macro xscale_set_pte_ext_prologue
236 str r1, [r0] @ linux version
238 eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY
240 bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits
241 orr r2, r2, #PTE_TYPE_EXT @ extended page
243 tst r3, #L_PTE_USER @ user?
244 orrne r2, r2, #PTE_EXT_AP_URO_SRW @ yes -> user r/o, system r/w
246 tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty?
247 orreq r2, r2, #PTE_EXT_AP_UNO_SRW @ yes -> user n/a, system r/w
248 @ combined with user -> user r/w
251 .macro xscale_set_pte_ext_epilogue
252 tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ present and young?
253 movne r2, #0 @ no -> fault
255 str r2, [r0, #2048]! @ hardware version
257 mcr p15, 0, r0, c7, c10, 1 @ clean L1 D line
258 mcr p15, 0, ip, c7, c10, 4 @ data write barrier
261 .macro define_processor_functions name:req, dabort:req, pabort:req, nommu=0, suspend=0
262 .type \name\()_processor_functions, #object
264 ENTRY(\name\()_processor_functions)
267 .word cpu_\name\()_proc_init
268 .word cpu_\name\()_proc_fin
269 .word cpu_\name\()_reset
270 .word cpu_\name\()_do_idle
271 .word cpu_\name\()_dcache_clean_area
272 .word cpu_\name\()_switch_mm
277 .word cpu_\name\()_set_pte_ext
281 .word cpu_\name\()_suspend_size
282 #ifdef CONFIG_ARM_CPU_SUSPEND
283 .word cpu_\name\()_do_suspend
284 .word cpu_\name\()_do_resume
295 .size \name\()_processor_functions, . - \name\()_processor_functions
298 .macro define_cache_functions name:req
300 .type \name\()_cache_fns, #object
301 ENTRY(\name\()_cache_fns)
302 .long \name\()_flush_icache_all
303 .long \name\()_flush_kern_cache_all
304 .long \name\()_flush_kern_cache_louis
305 .long \name\()_flush_user_cache_all
306 .long \name\()_flush_user_cache_range
307 .long \name\()_coherent_kern_range
308 .long \name\()_coherent_user_range
309 .long \name\()_flush_kern_dcache_area
310 .long \name\()_dma_map_area
311 .long \name\()_dma_unmap_area
312 .long \name\()_dma_flush_range
313 .size \name\()_cache_fns, . - \name\()_cache_fns
316 .macro define_tlb_functions name:req, flags_up:req, flags_smp
317 .type \name\()_tlb_fns, #object
318 ENTRY(\name\()_tlb_fns)
319 .long \name\()_flush_user_tlb_range
320 .long \name\()_flush_kern_tlb_range
322 ALT_SMP(.long \flags_smp )
323 ALT_UP(.long \flags_up )
327 .size \name\()_tlb_fns, . - \name\()_tlb_fns
330 .macro globl_equ x, y
335 .macro initfn, func, base
340 * Macro to calculate the log2 size for the protection region
341 * registers. This calculates rd = log2(size) - 1. tmp must
342 * not be the same register as rd.
344 .macro pr_sz, rd, size, tmp
345 mov \tmp, \size, lsr #12
347 1: movs \tmp, \tmp, lsr #1
353 * Macro to generate a protection region register value
354 * given a pre-masked address, size, and enable bit.
357 .macro pr_val, dest, addr, size, enable
358 pr_sz \dest, \size, \size @ calculate log2(size) - 1
359 orr \dest, \addr, \dest, lsl #1 @ mask in the region size
360 orr \dest, \dest, \enable