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
35 ldr \rd, [\rd, #TI_TASK]
36 .if (TSK_ACTIVE_MM > IMM12_MASK)
37 add \rd, \rd, #TSK_ACTIVE_MM & ~IMM12_MASK
39 ldr \rd, [\rd, #TSK_ACTIVE_MM & IMM12_MASK]
43 * mmid - get context id from mm pointer (mm->context.id)
44 * note, this field is 64bit, so in big-endian the two words are swapped too.
48 ldr \rd, [\rn, #MM_CONTEXT_ID + 4 ]
50 ldr \rd, [\rn, #MM_CONTEXT_ID]
55 * mask_asid - mask the ASID from the context ID
61 .macro crval, clear, mmuset, ucset
72 * dcache_line_size - get the minimum D-cache line size from the CTR register
75 .macro dcache_line_size, reg, tmp
77 movw \tmp, #:lower16:BASEADDR_V7M_SCB + V7M_SCB_CTR
78 movt \tmp, #:upper16:BASEADDR_V7M_SCB + V7M_SCB_CTR
81 mrc p15, 0, \tmp, c0, c0, 1 @ read ctr
84 and \tmp, \tmp, #0xf @ cache line size encoding
85 mov \reg, #4 @ bytes per word
86 mov \reg, \reg, lsl \tmp @ actual cache line size
90 * icache_line_size - get the minimum I-cache line size from the CTR register
93 .macro icache_line_size, reg, tmp
95 movw \tmp, #:lower16:BASEADDR_V7M_SCB + V7M_SCB_CTR
96 movt \tmp, #:upper16:BASEADDR_V7M_SCB + V7M_SCB_CTR
99 mrc p15, 0, \tmp, c0, c0, 1 @ read ctr
101 and \tmp, \tmp, #0xf @ cache line size encoding
102 mov \reg, #4 @ bytes per word
103 mov \reg, \reg, lsl \tmp @ actual cache line size
107 * Sanity check the PTE configuration for the code below - which makes
108 * certain assumptions about how these bits are laid out.
111 #if L_PTE_SHARED != PTE_EXT_SHARED
112 #error PTE shared bit mismatch
114 #if !defined (CONFIG_ARM_LPAE) && \
115 (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\
116 L_PTE_PRESENT) > L_PTE_SHARED
117 #error Invalid Linux PTE bit settings
119 #endif /* CONFIG_MMU */
122 * The ARMv6 and ARMv7 set_pte_ext translation function.
124 * Permission translation:
125 * YUWD APX AP1 AP0 SVC User
126 * 0xxx 0 0 0 no acc no acc
127 * 100x 1 0 1 r/o no acc
128 * 10x0 1 0 1 r/o no acc
129 * 1011 0 0 1 r/w no acc
134 .macro armv6_mt_table pfx
136 .long 0x00 @ L_PTE_MT_UNCACHED
137 .long PTE_EXT_TEX(1) @ L_PTE_MT_BUFFERABLE
138 .long PTE_CACHEABLE @ L_PTE_MT_WRITETHROUGH
139 .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEBACK
140 .long PTE_BUFFERABLE @ L_PTE_MT_DEV_SHARED
142 .long 0x00 @ L_PTE_MT_MINICACHE (not present)
143 .long PTE_EXT_TEX(1) | PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEALLOC
145 .long PTE_EXT_TEX(1) @ L_PTE_MT_DEV_WC
147 .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_DEV_CACHED
148 .long PTE_EXT_TEX(2) @ L_PTE_MT_DEV_NONSHARED
151 .long PTE_CACHEABLE | PTE_BUFFERABLE | PTE_EXT_APX @ L_PTE_MT_VECTORS
154 .macro armv6_set_pte_ext pfx
155 str r1, [r0], #2048 @ linux version
157 bic r3, r1, #0x000003fc
158 bic r3, r3, #PTE_TYPE_MASK
160 orr r3, r3, #PTE_EXT_AP0 | 2
162 adr ip, \pfx\()_mt_table
163 and r2, r1, #L_PTE_MT_MASK
166 eor r1, r1, #L_PTE_DIRTY
167 tst r1, #L_PTE_DIRTY|L_PTE_RDONLY
168 orrne r3, r3, #PTE_EXT_APX
171 orrne r3, r3, #PTE_EXT_AP1
172 tstne r3, #PTE_EXT_APX
174 @ user read-only -> kernel read-only
175 bicne r3, r3, #PTE_EXT_AP0
178 orrne r3, r3, #PTE_EXT_XN
183 tstne r1, #L_PTE_PRESENT
185 tstne r1, #L_PTE_NONE
189 mcr p15, 0, r0, c7, c10, 1 @ flush_pte
194 * The ARMv3, ARMv4 and ARMv5 set_pte_ext translation function,
195 * covering most CPUs except Xscale and Xscale 3.
197 * Permission translation:
199 * 0xxx 0x00 no acc no acc
200 * 100x 0x00 r/o no acc
201 * 10x0 0x00 r/o no acc
202 * 1011 0x55 r/w no acc
207 .macro armv3_set_pte_ext wc_disable=1
208 str r1, [r0], #2048 @ linux version
210 eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY
212 bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits
213 bic r2, r2, #PTE_TYPE_MASK
214 orr r2, r2, #PTE_TYPE_SMALL
216 tst r3, #L_PTE_USER @ user?
217 orrne r2, r2, #PTE_SMALL_AP_URO_SRW
219 tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty?
220 orreq r2, r2, #PTE_SMALL_AP_UNO_SRW
222 tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ present and young?
226 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
227 tst r2, #PTE_CACHEABLE
228 bicne r2, r2, #PTE_BUFFERABLE
231 str r2, [r0] @ hardware version
236 * Xscale set_pte_ext translation, split into two halves to cope
237 * with work-arounds. r3 must be preserved by code between these
240 * Permission translation:
242 * 0xxx 00 no acc no acc
250 .macro xscale_set_pte_ext_prologue
251 str r1, [r0] @ linux version
253 eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY
255 bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits
256 orr r2, r2, #PTE_TYPE_EXT @ extended page
258 tst r3, #L_PTE_USER @ user?
259 orrne r2, r2, #PTE_EXT_AP_URO_SRW @ yes -> user r/o, system r/w
261 tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty?
262 orreq r2, r2, #PTE_EXT_AP_UNO_SRW @ yes -> user n/a, system r/w
263 @ combined with user -> user r/w
266 .macro xscale_set_pte_ext_epilogue
267 tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ present and young?
268 movne r2, #0 @ no -> fault
270 str r2, [r0, #2048]! @ hardware version
272 mcr p15, 0, r0, c7, c10, 1 @ clean L1 D line
273 mcr p15, 0, ip, c7, c10, 4 @ data write barrier
276 .macro define_processor_functions name:req, dabort:req, pabort:req, nommu=0, suspend=0, bugs=0
278 * If we are building for big.Little with branch predictor hardening,
279 * we need the processor function tables to remain available after boot.
281 #if defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR)
284 .type \name\()_processor_functions, #object
286 ENTRY(\name\()_processor_functions)
289 .word cpu_\name\()_proc_init
291 .word cpu_\name\()_proc_fin
292 .word cpu_\name\()_reset
293 .word cpu_\name\()_do_idle
294 .word cpu_\name\()_dcache_clean_area
295 .word cpu_\name\()_switch_mm
300 .word cpu_\name\()_set_pte_ext
304 .word cpu_\name\()_suspend_size
305 #ifdef CONFIG_ARM_CPU_SUSPEND
306 .word cpu_\name\()_do_suspend
307 .word cpu_\name\()_do_resume
318 .size \name\()_processor_functions, . - \name\()_processor_functions
319 #if defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR)
324 .macro define_cache_functions name:req
326 .type \name\()_cache_fns, #object
327 ENTRY(\name\()_cache_fns)
328 .long \name\()_flush_icache_all
329 .long \name\()_flush_kern_cache_all
330 .long \name\()_flush_kern_cache_louis
331 .long \name\()_flush_user_cache_all
332 .long \name\()_flush_user_cache_range
333 .long \name\()_coherent_kern_range
334 .long \name\()_coherent_user_range
335 .long \name\()_flush_kern_dcache_area
336 .long \name\()_dma_map_area
337 .long \name\()_dma_unmap_area
338 .long \name\()_dma_flush_range
339 .size \name\()_cache_fns, . - \name\()_cache_fns
342 .macro define_tlb_functions name:req, flags_up:req, flags_smp
343 .type \name\()_tlb_fns, #object
344 ENTRY(\name\()_tlb_fns)
345 .long \name\()_flush_user_tlb_range
346 .long \name\()_flush_kern_tlb_range
348 ALT_SMP(.long \flags_smp )
349 ALT_UP(.long \flags_up )
353 .size \name\()_tlb_fns, . - \name\()_tlb_fns
356 .macro globl_equ x, y
361 .macro initfn, func, base
366 * Macro to calculate the log2 size for the protection region
367 * registers. This calculates rd = log2(size) - 1. tmp must
368 * not be the same register as rd.
370 .macro pr_sz, rd, size, tmp
371 mov \tmp, \size, lsr #12
373 1: movs \tmp, \tmp, lsr #1
379 * Macro to generate a protection region register value
380 * given a pre-masked address, size, and enable bit.
383 .macro pr_val, dest, addr, size, enable
384 pr_sz \dest, \size, \size @ calculate log2(size) - 1
385 orr \dest, \addr, \dest, lsl #1 @ mask in the region size
386 orr \dest, \dest, \enable