1 /* SPDX-License-Identifier: GPL-2.0 */
3 * We need constants.h for:
8 #include <asm/asm-offsets.h>
9 #include <asm/thread_info.h>
16 * vma_vm_mm - get mm pointer from vma pointer (vma->vm_mm)
18 .macro vma_vm_mm, rd, rn
19 ldr \rd, [\rn, #VMA_VM_MM]
23 * vma_vm_flags - get vma->vm_flags
25 .macro vma_vm_flags, rd, rn
26 ldr \rd, [\rn, #VMA_VM_FLAGS]
30 * act_mm - get current->active_mm
34 ldr \rd, [\rd, #TI_TASK]
35 .if (TSK_ACTIVE_MM > IMM12_MASK)
36 add \rd, \rd, #TSK_ACTIVE_MM & ~IMM12_MASK
38 ldr \rd, [\rd, #TSK_ACTIVE_MM & IMM12_MASK]
42 * mmid - get context id from mm pointer (mm->context.id)
43 * note, this field is 64bit, so in big-endian the two words are swapped too.
47 ldr \rd, [\rn, #MM_CONTEXT_ID + 4 ]
49 ldr \rd, [\rn, #MM_CONTEXT_ID]
54 * mask_asid - mask the ASID from the context ID
60 .macro crval, clear, mmuset, ucset
71 * dcache_line_size - get the minimum D-cache line size from the CTR register
74 .macro dcache_line_size, reg, tmp
76 movw \tmp, #:lower16:BASEADDR_V7M_SCB + V7M_SCB_CTR
77 movt \tmp, #:upper16:BASEADDR_V7M_SCB + V7M_SCB_CTR
80 mrc p15, 0, \tmp, c0, c0, 1 @ read ctr
83 and \tmp, \tmp, #0xf @ cache line size encoding
84 mov \reg, #4 @ bytes per word
85 mov \reg, \reg, lsl \tmp @ actual cache line size
89 * icache_line_size - get the minimum I-cache line size from the CTR register
92 .macro icache_line_size, reg, tmp
94 movw \tmp, #:lower16:BASEADDR_V7M_SCB + V7M_SCB_CTR
95 movt \tmp, #:upper16:BASEADDR_V7M_SCB + V7M_SCB_CTR
98 mrc p15, 0, \tmp, c0, c0, 1 @ read ctr
100 and \tmp, \tmp, #0xf @ cache line size encoding
101 mov \reg, #4 @ bytes per word
102 mov \reg, \reg, lsl \tmp @ actual cache line size
106 * Sanity check the PTE configuration for the code below - which makes
107 * certain assumptions about how these bits are laid out.
110 #if L_PTE_SHARED != PTE_EXT_SHARED
111 #error PTE shared bit mismatch
113 #if !defined (CONFIG_ARM_LPAE) && \
114 (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\
115 L_PTE_PRESENT) > L_PTE_SHARED
116 #error Invalid Linux PTE bit settings
118 #endif /* CONFIG_MMU */
121 * The ARMv6 and ARMv7 set_pte_ext translation function.
123 * Permission translation:
124 * YUWD APX AP1 AP0 SVC User
125 * 0xxx 0 0 0 no acc no acc
126 * 100x 1 0 1 r/o no acc
127 * 10x0 1 0 1 r/o no acc
128 * 1011 0 0 1 r/w no acc
133 .macro armv6_mt_table pfx
135 .long 0x00 @ L_PTE_MT_UNCACHED
136 .long PTE_EXT_TEX(1) @ L_PTE_MT_BUFFERABLE
137 .long PTE_CACHEABLE @ L_PTE_MT_WRITETHROUGH
138 .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEBACK
139 .long PTE_BUFFERABLE @ L_PTE_MT_DEV_SHARED
141 .long 0x00 @ L_PTE_MT_MINICACHE (not present)
142 .long PTE_EXT_TEX(1) | PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEALLOC
144 .long PTE_EXT_TEX(1) @ L_PTE_MT_DEV_WC
146 .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_DEV_CACHED
147 .long PTE_EXT_TEX(2) @ L_PTE_MT_DEV_NONSHARED
150 .long PTE_CACHEABLE | PTE_BUFFERABLE | PTE_EXT_APX @ L_PTE_MT_VECTORS
153 .macro armv6_set_pte_ext pfx
154 str r1, [r0], #2048 @ linux version
156 bic r3, r1, #0x000003fc
157 bic r3, r3, #PTE_TYPE_MASK
159 orr r3, r3, #PTE_EXT_AP0 | 2
161 adr ip, \pfx\()_mt_table
162 and r2, r1, #L_PTE_MT_MASK
165 eor r1, r1, #L_PTE_DIRTY
166 tst r1, #L_PTE_DIRTY|L_PTE_RDONLY
167 orrne r3, r3, #PTE_EXT_APX
170 orrne r3, r3, #PTE_EXT_AP1
171 tstne r3, #PTE_EXT_APX
173 @ user read-only -> kernel read-only
174 bicne r3, r3, #PTE_EXT_AP0
177 orrne r3, r3, #PTE_EXT_XN
182 tstne r1, #L_PTE_PRESENT
184 tstne r1, #L_PTE_NONE
188 mcr p15, 0, r0, c7, c10, 1 @ flush_pte
193 * The ARMv3, ARMv4 and ARMv5 set_pte_ext translation function,
194 * covering most CPUs except Xscale and Xscale 3.
196 * Permission translation:
198 * 0xxx 0x00 no acc no acc
199 * 100x 0x00 r/o no acc
200 * 10x0 0x00 r/o no acc
201 * 1011 0x55 r/w no acc
206 .macro armv3_set_pte_ext wc_disable=1
207 str r1, [r0], #2048 @ linux version
209 eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY
211 bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits
212 bic r2, r2, #PTE_TYPE_MASK
213 orr r2, r2, #PTE_TYPE_SMALL
215 tst r3, #L_PTE_USER @ user?
216 orrne r2, r2, #PTE_SMALL_AP_URO_SRW
218 tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty?
219 orreq r2, r2, #PTE_SMALL_AP_UNO_SRW
221 tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ present and young?
225 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
226 tst r2, #PTE_CACHEABLE
227 bicne r2, r2, #PTE_BUFFERABLE
230 str r2, [r0] @ hardware version
235 * Xscale set_pte_ext translation, split into two halves to cope
236 * with work-arounds. r3 must be preserved by code between these
239 * Permission translation:
241 * 0xxx 00 no acc no acc
249 .macro xscale_set_pte_ext_prologue
250 str r1, [r0] @ linux version
252 eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY
254 bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits
255 orr r2, r2, #PTE_TYPE_EXT @ extended page
257 tst r3, #L_PTE_USER @ user?
258 orrne r2, r2, #PTE_EXT_AP_URO_SRW @ yes -> user r/o, system r/w
260 tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty?
261 orreq r2, r2, #PTE_EXT_AP_UNO_SRW @ yes -> user n/a, system r/w
262 @ combined with user -> user r/w
265 .macro xscale_set_pte_ext_epilogue
266 tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ present and young?
267 movne r2, #0 @ no -> fault
269 str r2, [r0, #2048]! @ hardware version
271 mcr p15, 0, r0, c7, c10, 1 @ clean L1 D line
272 mcr p15, 0, ip, c7, c10, 4 @ data write barrier
275 .macro define_processor_functions name:req, dabort:req, pabort:req, nommu=0, suspend=0, bugs=0
277 * If we are building for big.Little with branch predictor hardening,
278 * we need the processor function tables to remain available after boot.
280 #if defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR)
283 .type \name\()_processor_functions, #object
285 ENTRY(\name\()_processor_functions)
288 .word cpu_\name\()_proc_init
290 .word cpu_\name\()_proc_fin
291 .word cpu_\name\()_reset
292 .word cpu_\name\()_do_idle
293 .word cpu_\name\()_dcache_clean_area
294 .word cpu_\name\()_switch_mm
299 .word cpu_\name\()_set_pte_ext
303 .word cpu_\name\()_suspend_size
304 #ifdef CONFIG_ARM_CPU_SUSPEND
305 .word cpu_\name\()_do_suspend
306 .word cpu_\name\()_do_resume
317 .size \name\()_processor_functions, . - \name\()_processor_functions
318 #if defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR)
323 .macro define_cache_functions name:req
325 .type \name\()_cache_fns, #object
326 ENTRY(\name\()_cache_fns)
327 .long \name\()_flush_icache_all
328 .long \name\()_flush_kern_cache_all
329 .long \name\()_flush_kern_cache_louis
330 .long \name\()_flush_user_cache_all
331 .long \name\()_flush_user_cache_range
332 .long \name\()_coherent_kern_range
333 .long \name\()_coherent_user_range
334 .long \name\()_flush_kern_dcache_area
335 .long \name\()_dma_map_area
336 .long \name\()_dma_unmap_area
337 .long \name\()_dma_flush_range
338 .size \name\()_cache_fns, . - \name\()_cache_fns
341 .macro define_tlb_functions name:req, flags_up:req, flags_smp
342 .type \name\()_tlb_fns, #object
343 ENTRY(\name\()_tlb_fns)
344 .long \name\()_flush_user_tlb_range
345 .long \name\()_flush_kern_tlb_range
347 ALT_SMP(.long \flags_smp )
348 ALT_UP(.long \flags_up )
352 .size \name\()_tlb_fns, . - \name\()_tlb_fns
355 .macro globl_equ x, y
360 .macro initfn, func, base
365 * Macro to calculate the log2 size for the protection region
366 * registers. This calculates rd = log2(size) - 1. tmp must
367 * not be the same register as rd.
369 .macro pr_sz, rd, size, tmp
370 mov \tmp, \size, lsr #12
372 1: movs \tmp, \tmp, lsr #1
378 * Macro to generate a protection region register value
379 * given a pre-masked address, size, and enable bit.
382 .macro pr_val, dest, addr, size, enable
383 pr_sz \dest, \size, \size @ calculate log2(size) - 1
384 orr \dest, \addr, \dest, lsl #1 @ mask in the region size
385 orr \dest, \dest, \enable