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1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2003, 2004 Ralf Baechle
7 * Copyright (C) 2004 Maciej W. Rozycki
8 */
9#ifndef __ASM_CPU_FEATURES_H
10#define __ASM_CPU_FEATURES_H
11
12#include <asm/cpu.h>
13#include <asm/cpu-info.h>
14#include <asm/isa-rev.h>
15#include <cpu-feature-overrides.h>
16
17#define __ase(ase) (cpu_data[0].ases & (ase))
18#define __isa(isa) (cpu_data[0].isa_level & (isa))
19#define __opt(opt) (cpu_data[0].options & (opt))
20
21/*
22 * Check if MIPS_ISA_REV is >= isa *and* an option or ASE is detected during
23 * boot (typically by cpu_probe()).
24 *
25 * Note that these should only be used in cases where a kernel built for an
26 * older ISA *cannot* run on a CPU which supports the feature in question. For
27 * example this may be used for features introduced with MIPSr6, since a kernel
28 * built for an older ISA cannot run on a MIPSr6 CPU. This should not be used
29 * for MIPSr2 features however, since a MIPSr1 or earlier kernel might run on a
30 * MIPSr2 CPU.
31 */
32#define __isa_ge_and_ase(isa, ase) ((MIPS_ISA_REV >= (isa)) && __ase(ase))
33#define __isa_ge_and_opt(isa, opt) ((MIPS_ISA_REV >= (isa)) && __opt(opt))
34
35/*
36 * Check if MIPS_ISA_REV is >= isa *or* an option or ASE is detected during
37 * boot (typically by cpu_probe()).
38 *
39 * These are for use with features that are optional up until a particular ISA
40 * revision & then become required.
41 */
42#define __isa_ge_or_ase(isa, ase) ((MIPS_ISA_REV >= (isa)) || __ase(ase))
43#define __isa_ge_or_opt(isa, opt) ((MIPS_ISA_REV >= (isa)) || __opt(opt))
44
45/*
46 * Check if MIPS_ISA_REV is < isa *and* an option or ASE is detected during
47 * boot (typically by cpu_probe()).
48 *
49 * These are for use with features that are optional up until a particular ISA
50 * revision & are then removed - ie. no longer present in any CPU implementing
51 * the given ISA revision.
52 */
53#define __isa_lt_and_ase(isa, ase) ((MIPS_ISA_REV < (isa)) && __ase(ase))
54#define __isa_lt_and_opt(isa, opt) ((MIPS_ISA_REV < (isa)) && __opt(opt))
55
56/*
57 * Similarly allow for ISA level checks that take into account knowledge of the
58 * ISA targeted by the kernel build, provided by MIPS_ISA_REV.
59 */
60#define __isa_ge_and_flag(isa, flag) ((MIPS_ISA_REV >= (isa)) && __isa(flag))
61#define __isa_ge_or_flag(isa, flag) ((MIPS_ISA_REV >= (isa)) || __isa(flag))
62#define __isa_lt_and_flag(isa, flag) ((MIPS_ISA_REV < (isa)) && __isa(flag))
63#define __isa_range(ge, lt) \
64 ((MIPS_ISA_REV >= (ge)) && (MIPS_ISA_REV < (lt)))
65#define __isa_range_or_flag(ge, lt, flag) \
66 (__isa_range(ge, lt) || ((MIPS_ISA_REV < (lt)) && __isa(flag)))
67#define __isa_range_and_ase(ge, lt, ase) \
68 (__isa_range(ge, lt) && __ase(ase))
69
70/*
71 * SMP assumption: Options of CPU 0 are a superset of all processors.
72 * This is true for all known MIPS systems.
73 */
74#ifndef cpu_has_tlb
75#define cpu_has_tlb __opt(MIPS_CPU_TLB)
76#endif
77#ifndef cpu_has_ftlb
78#define cpu_has_ftlb __opt(MIPS_CPU_FTLB)
79#endif
80#ifndef cpu_has_tlbinv
81#define cpu_has_tlbinv __opt(MIPS_CPU_TLBINV)
82#endif
83#ifndef cpu_has_segments
84#define cpu_has_segments __opt(MIPS_CPU_SEGMENTS)
85#endif
86#ifndef cpu_has_eva
87#define cpu_has_eva __opt(MIPS_CPU_EVA)
88#endif
89#ifndef cpu_has_htw
90#define cpu_has_htw __opt(MIPS_CPU_HTW)
91#endif
92#ifndef cpu_has_ldpte
93#define cpu_has_ldpte __opt(MIPS_CPU_LDPTE)
94#endif
95#ifndef cpu_has_rixiex
96#define cpu_has_rixiex __isa_ge_or_opt(6, MIPS_CPU_RIXIEX)
97#endif
98#ifndef cpu_has_maar
99#define cpu_has_maar __opt(MIPS_CPU_MAAR)
100#endif
101#ifndef cpu_has_rw_llb
102#define cpu_has_rw_llb __isa_ge_or_opt(6, MIPS_CPU_RW_LLB)
103#endif
104
105/*
106 * For the moment we don't consider R6000 and R8000 so we can assume that
107 * anything that doesn't support R4000-style exceptions and interrupts is
108 * R3000-like. Users should still treat these two macro definitions as
109 * opaque.
110 */
111#ifndef cpu_has_3kex
112#define cpu_has_3kex (!cpu_has_4kex)
113#endif
114#ifndef cpu_has_4kex
115#define cpu_has_4kex __isa_ge_or_opt(1, MIPS_CPU_4KEX)
116#endif
117#ifndef cpu_has_3k_cache
118#define cpu_has_3k_cache __isa_lt_and_opt(1, MIPS_CPU_3K_CACHE)
119#endif
120#ifndef cpu_has_4k_cache
121#define cpu_has_4k_cache __opt(MIPS_CPU_4K_CACHE)
122#endif
123#ifndef cpu_has_octeon_cache
124#define cpu_has_octeon_cache \
125({ \
126 int __res; \
127 \
128 switch (boot_cpu_type()) { \
129 case CPU_CAVIUM_OCTEON: \
130 case CPU_CAVIUM_OCTEON_PLUS: \
131 case CPU_CAVIUM_OCTEON2: \
132 case CPU_CAVIUM_OCTEON3: \
133 __res = 1; \
134 break; \
135 \
136 default: \
137 __res = 0; \
138 } \
139 \
140 __res; \
141})
142#endif
143/* Don't override `cpu_has_fpu' to 1 or the "nofpu" option won't work. */
144#ifndef cpu_has_fpu
145# ifdef CONFIG_MIPS_FP_SUPPORT
146# define cpu_has_fpu (current_cpu_data.options & MIPS_CPU_FPU)
147# define raw_cpu_has_fpu (raw_current_cpu_data.options & MIPS_CPU_FPU)
148# else
149# define cpu_has_fpu 0
150# define raw_cpu_has_fpu 0
151# endif
152#else
153# if cpu_has_fpu
154# error "Forcing `cpu_has_fpu' to non-zero is not supported"
155# endif
156# define raw_cpu_has_fpu cpu_has_fpu
157#endif
158#ifndef cpu_has_32fpr
159#define cpu_has_32fpr __isa_ge_or_opt(1, MIPS_CPU_32FPR)
160#endif
161#ifndef cpu_has_counter
162#define cpu_has_counter __opt(MIPS_CPU_COUNTER)
163#endif
164#ifndef cpu_has_watch
165#define cpu_has_watch __opt(MIPS_CPU_WATCH)
166#endif
167#ifndef cpu_has_divec
168#define cpu_has_divec __isa_ge_or_opt(1, MIPS_CPU_DIVEC)
169#endif
170#ifndef cpu_has_vce
171#define cpu_has_vce __opt(MIPS_CPU_VCE)
172#endif
173#ifndef cpu_has_cache_cdex_p
174#define cpu_has_cache_cdex_p __opt(MIPS_CPU_CACHE_CDEX_P)
175#endif
176#ifndef cpu_has_cache_cdex_s
177#define cpu_has_cache_cdex_s __opt(MIPS_CPU_CACHE_CDEX_S)
178#endif
179#ifndef cpu_has_prefetch
180#define cpu_has_prefetch __isa_ge_or_opt(1, MIPS_CPU_PREFETCH)
181#endif
182#ifndef cpu_has_mcheck
183#define cpu_has_mcheck __isa_ge_or_opt(1, MIPS_CPU_MCHECK)
184#endif
185#ifndef cpu_has_ejtag
186#define cpu_has_ejtag __opt(MIPS_CPU_EJTAG)
187#endif
188#ifndef cpu_has_llsc
189#define cpu_has_llsc __isa_ge_or_opt(1, MIPS_CPU_LLSC)
190#endif
191#ifndef kernel_uses_llsc
192#define kernel_uses_llsc cpu_has_llsc
193#endif
194#ifndef cpu_has_guestctl0ext
195#define cpu_has_guestctl0ext __opt(MIPS_CPU_GUESTCTL0EXT)
196#endif
197#ifndef cpu_has_guestctl1
198#define cpu_has_guestctl1 __opt(MIPS_CPU_GUESTCTL1)
199#endif
200#ifndef cpu_has_guestctl2
201#define cpu_has_guestctl2 __opt(MIPS_CPU_GUESTCTL2)
202#endif
203#ifndef cpu_has_guestid
204#define cpu_has_guestid __opt(MIPS_CPU_GUESTID)
205#endif
206#ifndef cpu_has_drg
207#define cpu_has_drg __opt(MIPS_CPU_DRG)
208#endif
209#ifndef cpu_has_mips16
210#define cpu_has_mips16 __isa_lt_and_ase(6, MIPS_ASE_MIPS16)
211#endif
212#ifndef cpu_has_mips16e2
213#define cpu_has_mips16e2 __isa_lt_and_ase(6, MIPS_ASE_MIPS16E2)
214#endif
215#ifndef cpu_has_mdmx
216#define cpu_has_mdmx __isa_lt_and_ase(6, MIPS_ASE_MDMX)
217#endif
218#ifndef cpu_has_mips3d
219#define cpu_has_mips3d __isa_lt_and_ase(6, MIPS_ASE_MIPS3D)
220#endif
221#ifndef cpu_has_smartmips
222#define cpu_has_smartmips __isa_lt_and_ase(6, MIPS_ASE_SMARTMIPS)
223#endif
224
225#ifndef cpu_has_rixi
226#define cpu_has_rixi __isa_ge_or_opt(6, MIPS_CPU_RIXI)
227#endif
228
229#ifndef cpu_has_mmips
230# if defined(__mips_micromips)
231# define cpu_has_mmips 1
232# elif defined(CONFIG_SYS_SUPPORTS_MICROMIPS)
233# define cpu_has_mmips __opt(MIPS_CPU_MICROMIPS)
234# else
235# define cpu_has_mmips 0
236# endif
237#endif
238
239#ifndef cpu_has_lpa
240#define cpu_has_lpa __opt(MIPS_CPU_LPA)
241#endif
242#ifndef cpu_has_mvh
243#define cpu_has_mvh __opt(MIPS_CPU_MVH)
244#endif
245#ifndef cpu_has_xpa
246#define cpu_has_xpa (cpu_has_lpa && cpu_has_mvh)
247#endif
248#ifndef cpu_has_vtag_icache
249#define cpu_has_vtag_icache (cpu_data[0].icache.flags & MIPS_CACHE_VTAG)
250#endif
251#ifndef cpu_has_dc_aliases
252#define cpu_has_dc_aliases (cpu_data[0].dcache.flags & MIPS_CACHE_ALIASES)
253#endif
254#ifndef cpu_has_ic_fills_f_dc
255#define cpu_has_ic_fills_f_dc (cpu_data[0].icache.flags & MIPS_CACHE_IC_F_DC)
256#endif
257#ifndef cpu_has_pindexed_dcache
258#define cpu_has_pindexed_dcache (cpu_data[0].dcache.flags & MIPS_CACHE_PINDEX)
259#endif
260
261/*
262 * I-Cache snoops remote store. This only matters on SMP. Some multiprocessors
263 * such as the R10000 have I-Caches that snoop local stores; the embedded ones
264 * don't. For maintaining I-cache coherency this means we need to flush the
265 * D-cache all the way back to whever the I-cache does refills from, so the
266 * I-cache has a chance to see the new data at all. Then we have to flush the
267 * I-cache also.
268 * Note we may have been rescheduled and may no longer be running on the CPU
269 * that did the store so we can't optimize this into only doing the flush on
270 * the local CPU.
271 */
272#ifndef cpu_icache_snoops_remote_store
273#ifdef CONFIG_SMP
274#define cpu_icache_snoops_remote_store (cpu_data[0].icache.flags & MIPS_IC_SNOOPS_REMOTE)
275#else
276#define cpu_icache_snoops_remote_store 1
277#endif
278#endif
279
280#ifndef cpu_has_mips_1
281# define cpu_has_mips_1 (MIPS_ISA_REV < 6)
282#endif
283#ifndef cpu_has_mips_2
284# define cpu_has_mips_2 __isa_lt_and_flag(6, MIPS_CPU_ISA_II)
285#endif
286#ifndef cpu_has_mips_3
287# define cpu_has_mips_3 __isa_lt_and_flag(6, MIPS_CPU_ISA_III)
288#endif
289#ifndef cpu_has_mips_4
290# define cpu_has_mips_4 __isa_lt_and_flag(6, MIPS_CPU_ISA_IV)
291#endif
292#ifndef cpu_has_mips_5
293# define cpu_has_mips_5 __isa_lt_and_flag(6, MIPS_CPU_ISA_V)
294#endif
295#ifndef cpu_has_mips32r1
296# define cpu_has_mips32r1 __isa_range_or_flag(1, 6, MIPS_CPU_ISA_M32R1)
297#endif
298#ifndef cpu_has_mips32r2
299# define cpu_has_mips32r2 __isa_range_or_flag(2, 6, MIPS_CPU_ISA_M32R2)
300#endif
301#ifndef cpu_has_mips32r5
302# define cpu_has_mips32r5 __isa_range_or_flag(5, 6, MIPS_CPU_ISA_M32R5)
303#endif
304#ifndef cpu_has_mips32r6
305# define cpu_has_mips32r6 __isa_ge_or_flag(6, MIPS_CPU_ISA_M32R6)
306#endif
307#ifndef cpu_has_mips64r1
308# define cpu_has_mips64r1 (cpu_has_64bits && \
309 __isa_range_or_flag(1, 6, MIPS_CPU_ISA_M64R1))
310#endif
311#ifndef cpu_has_mips64r2
312# define cpu_has_mips64r2 (cpu_has_64bits && \
313 __isa_range_or_flag(2, 6, MIPS_CPU_ISA_M64R2))
314#endif
315#ifndef cpu_has_mips64r5
316# define cpu_has_mips64r5 (cpu_has_64bits && \
317 __isa_range_or_flag(5, 6, MIPS_CPU_ISA_M64R5))
318#endif
319#ifndef cpu_has_mips64r6
320# define cpu_has_mips64r6 __isa_ge_and_flag(6, MIPS_CPU_ISA_M64R6)
321#endif
322
323/*
324 * Shortcuts ...
325 */
326#define cpu_has_mips_2_3_4_5 (cpu_has_mips_2 | cpu_has_mips_3_4_5)
327#define cpu_has_mips_3_4_5 (cpu_has_mips_3 | cpu_has_mips_4_5)
328#define cpu_has_mips_4_5 (cpu_has_mips_4 | cpu_has_mips_5)
329
330#define cpu_has_mips_2_3_4_5_r (cpu_has_mips_2 | cpu_has_mips_3_4_5_r)
331#define cpu_has_mips_3_4_5_r (cpu_has_mips_3 | cpu_has_mips_4_5_r)
332#define cpu_has_mips_4_5_r (cpu_has_mips_4 | cpu_has_mips_5_r)
333#define cpu_has_mips_5_r (cpu_has_mips_5 | cpu_has_mips_r)
334
335#define cpu_has_mips_3_4_5_64_r2_r6 \
336 (cpu_has_mips_3 | cpu_has_mips_4_5_64_r2_r6)
337#define cpu_has_mips_4_5_64_r2_r6 \
338 (cpu_has_mips_4_5 | cpu_has_mips64r1 | \
339 cpu_has_mips_r2 | cpu_has_mips_r5 | \
340 cpu_has_mips_r6)
341
342#define cpu_has_mips32 (cpu_has_mips32r1 | cpu_has_mips32r2 | \
343 cpu_has_mips32r5 | cpu_has_mips32r6)
344#define cpu_has_mips64 (cpu_has_mips64r1 | cpu_has_mips64r2 | \
345 cpu_has_mips64r5 | cpu_has_mips64r6)
346#define cpu_has_mips_r1 (cpu_has_mips32r1 | cpu_has_mips64r1)
347#define cpu_has_mips_r2 (cpu_has_mips32r2 | cpu_has_mips64r2)
348#define cpu_has_mips_r5 (cpu_has_mips32r5 | cpu_has_mips64r5)
349#define cpu_has_mips_r6 (cpu_has_mips32r6 | cpu_has_mips64r6)
350#define cpu_has_mips_r (cpu_has_mips32r1 | cpu_has_mips32r2 | \
351 cpu_has_mips32r5 | cpu_has_mips32r6 | \
352 cpu_has_mips64r1 | cpu_has_mips64r2 | \
353 cpu_has_mips64r5 | cpu_has_mips64r6)
354
355/* MIPSR2 - MIPSR6 have a lot of similarities */
356#define cpu_has_mips_r2_r6 (cpu_has_mips_r2 | cpu_has_mips_r5 | \
357 cpu_has_mips_r6)
358
359/*
360 * cpu_has_mips_r2_exec_hazard - return if IHB is required on current processor
361 *
362 * Returns non-zero value if the current processor implementation requires
363 * an IHB instruction to deal with an instruction hazard as per MIPS R2
364 * architecture specification, zero otherwise.
365 */
366#ifndef cpu_has_mips_r2_exec_hazard
367#define cpu_has_mips_r2_exec_hazard \
368({ \
369 int __res; \
370 \
371 switch (boot_cpu_type()) { \
372 case CPU_M14KC: \
373 case CPU_74K: \
374 case CPU_1074K: \
375 case CPU_PROAPTIV: \
376 case CPU_P5600: \
377 case CPU_M5150: \
378 case CPU_QEMU_GENERIC: \
379 case CPU_CAVIUM_OCTEON: \
380 case CPU_CAVIUM_OCTEON_PLUS: \
381 case CPU_CAVIUM_OCTEON2: \
382 case CPU_CAVIUM_OCTEON3: \
383 __res = 0; \
384 break; \
385 \
386 default: \
387 __res = 1; \
388 } \
389 \
390 __res; \
391})
392#endif
393
394/*
395 * MIPS32, MIPS64, VR5500, IDT32332, IDT32334 and maybe a few other
396 * pre-MIPS32/MIPS64 processors have CLO, CLZ. The IDT RC64574 is 64-bit and
397 * has CLO and CLZ but not DCLO nor DCLZ. For 64-bit kernels
398 * cpu_has_clo_clz also indicates the availability of DCLO and DCLZ.
399 */
400#ifndef cpu_has_clo_clz
401#define cpu_has_clo_clz cpu_has_mips_r
402#endif
403
404/*
405 * MIPS32 R2, MIPS64 R2, Loongson 3A and Octeon have WSBH.
406 * MIPS64 R2, Loongson 3A and Octeon have WSBH, DSBH and DSHD.
407 * This indicates the availability of WSBH and in case of 64 bit CPUs also
408 * DSBH and DSHD.
409 */
410#ifndef cpu_has_wsbh
411#define cpu_has_wsbh cpu_has_mips_r2
412#endif
413
414#ifndef cpu_has_dsp
415#define cpu_has_dsp __ase(MIPS_ASE_DSP)
416#endif
417
418#ifndef cpu_has_dsp2
419#define cpu_has_dsp2 __ase(MIPS_ASE_DSP2P)
420#endif
421
422#ifndef cpu_has_dsp3
423#define cpu_has_dsp3 __ase(MIPS_ASE_DSP3)
424#endif
425
426#ifndef cpu_has_loongson_mmi
427#define cpu_has_loongson_mmi __ase(MIPS_ASE_LOONGSON_MMI)
428#endif
429
430#ifndef cpu_has_loongson_cam
431#define cpu_has_loongson_cam __ase(MIPS_ASE_LOONGSON_CAM)
432#endif
433
434#ifndef cpu_has_loongson_ext
435#define cpu_has_loongson_ext __ase(MIPS_ASE_LOONGSON_EXT)
436#endif
437
438#ifndef cpu_has_loongson_ext2
439#define cpu_has_loongson_ext2 __ase(MIPS_ASE_LOONGSON_EXT2)
440#endif
441
442#ifndef cpu_has_mipsmt
443#define cpu_has_mipsmt __isa_range_and_ase(2, 6, MIPS_ASE_MIPSMT)
444#endif
445
446#ifndef cpu_has_vp
447#define cpu_has_vp __isa_ge_and_opt(6, MIPS_CPU_VP)
448#endif
449
450#ifndef cpu_has_userlocal
451#define cpu_has_userlocal __isa_ge_or_opt(6, MIPS_CPU_ULRI)
452#endif
453
454#ifdef CONFIG_32BIT
455# ifndef cpu_has_nofpuex
456# define cpu_has_nofpuex __isa_lt_and_opt(1, MIPS_CPU_NOFPUEX)
457# endif
458# ifndef cpu_has_64bits
459# define cpu_has_64bits (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
460# endif
461# ifndef cpu_has_64bit_zero_reg
462# define cpu_has_64bit_zero_reg (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
463# endif
464# ifndef cpu_has_64bit_gp_regs
465# define cpu_has_64bit_gp_regs 0
466# endif
467# ifndef cpu_vmbits
468# define cpu_vmbits 31
469# endif
470#endif
471
472#ifdef CONFIG_64BIT
473# ifndef cpu_has_nofpuex
474# define cpu_has_nofpuex 0
475# endif
476# ifndef cpu_has_64bits
477# define cpu_has_64bits 1
478# endif
479# ifndef cpu_has_64bit_zero_reg
480# define cpu_has_64bit_zero_reg 1
481# endif
482# ifndef cpu_has_64bit_gp_regs
483# define cpu_has_64bit_gp_regs 1
484# endif
485# ifndef cpu_vmbits
486# define cpu_vmbits cpu_data[0].vmbits
487# define __NEED_VMBITS_PROBE
488# endif
489#endif
490
491#if defined(CONFIG_CPU_MIPSR2_IRQ_VI) && !defined(cpu_has_vint)
492# define cpu_has_vint __opt(MIPS_CPU_VINT)
493#elif !defined(cpu_has_vint)
494# define cpu_has_vint 0
495#endif
496
497#if defined(CONFIG_CPU_MIPSR2_IRQ_EI) && !defined(cpu_has_veic)
498# define cpu_has_veic __opt(MIPS_CPU_VEIC)
499#elif !defined(cpu_has_veic)
500# define cpu_has_veic 0
501#endif
502
503#ifndef cpu_has_inclusive_pcaches
504#define cpu_has_inclusive_pcaches __opt(MIPS_CPU_INCLUSIVE_CACHES)
505#endif
506
507#ifndef cpu_dcache_line_size
508#define cpu_dcache_line_size() cpu_data[0].dcache.linesz
509#endif
510#ifndef cpu_icache_line_size
511#define cpu_icache_line_size() cpu_data[0].icache.linesz
512#endif
513#ifndef cpu_scache_line_size
514#define cpu_scache_line_size() cpu_data[0].scache.linesz
515#endif
516#ifndef cpu_tcache_line_size
517#define cpu_tcache_line_size() cpu_data[0].tcache.linesz
518#endif
519
520#ifndef cpu_hwrena_impl_bits
521#define cpu_hwrena_impl_bits 0
522#endif
523
524#ifndef cpu_has_perf_cntr_intr_bit
525#define cpu_has_perf_cntr_intr_bit __opt(MIPS_CPU_PCI)
526#endif
527
528#ifndef cpu_has_vz
529#define cpu_has_vz __ase(MIPS_ASE_VZ)
530#endif
531
532#if defined(CONFIG_CPU_HAS_MSA) && !defined(cpu_has_msa)
533# define cpu_has_msa __ase(MIPS_ASE_MSA)
534#elif !defined(cpu_has_msa)
535# define cpu_has_msa 0
536#endif
537
538#ifndef cpu_has_ufr
539# define cpu_has_ufr __opt(MIPS_CPU_UFR)
540#endif
541
542#ifndef cpu_has_fre
543# define cpu_has_fre __opt(MIPS_CPU_FRE)
544#endif
545
546#ifndef cpu_has_cdmm
547# define cpu_has_cdmm __opt(MIPS_CPU_CDMM)
548#endif
549
550#ifndef cpu_has_small_pages
551# define cpu_has_small_pages __opt(MIPS_CPU_SP)
552#endif
553
554#ifndef cpu_has_nan_legacy
555#define cpu_has_nan_legacy __isa_lt_and_opt(6, MIPS_CPU_NAN_LEGACY)
556#endif
557#ifndef cpu_has_nan_2008
558#define cpu_has_nan_2008 __isa_ge_or_opt(6, MIPS_CPU_NAN_2008)
559#endif
560
561#ifndef cpu_has_ebase_wg
562# define cpu_has_ebase_wg __opt(MIPS_CPU_EBASE_WG)
563#endif
564
565#ifndef cpu_has_badinstr
566# define cpu_has_badinstr __isa_ge_or_opt(6, MIPS_CPU_BADINSTR)
567#endif
568
569#ifndef cpu_has_badinstrp
570# define cpu_has_badinstrp __isa_ge_or_opt(6, MIPS_CPU_BADINSTRP)
571#endif
572
573#ifndef cpu_has_contextconfig
574# define cpu_has_contextconfig __opt(MIPS_CPU_CTXTC)
575#endif
576
577#ifndef cpu_has_perf
578# define cpu_has_perf __opt(MIPS_CPU_PERF)
579#endif
580
581#ifndef cpu_has_mac2008_only
582# define cpu_has_mac2008_only __opt(MIPS_CPU_MAC_2008_ONLY)
583#endif
584
585#ifndef cpu_has_ftlbparex
586# define cpu_has_ftlbparex __opt(MIPS_CPU_FTLBPAREX)
587#endif
588
589#ifndef cpu_has_gsexcex
590# define cpu_has_gsexcex __opt(MIPS_CPU_GSEXCEX)
591#endif
592
593#ifdef CONFIG_SMP
594/*
595 * Some systems share FTLB RAMs between threads within a core (siblings in
596 * kernel parlance). This means that FTLB entries may become invalid at almost
597 * any point when an entry is evicted due to a sibling thread writing an entry
598 * to the shared FTLB RAM.
599 *
600 * This is only relevant to SMP systems, and the only systems that exhibit this
601 * property implement MIPSr6 or higher so we constrain support for this to
602 * kernels that will run on such systems.
603 */
604# ifndef cpu_has_shared_ftlb_ram
605# define cpu_has_shared_ftlb_ram \
606 __isa_ge_and_opt(6, MIPS_CPU_SHARED_FTLB_RAM)
607# endif
608
609/*
610 * Some systems take this a step further & share FTLB entries between siblings.
611 * This is implemented as TLB writes happening as usual, but if an entry
612 * written by a sibling exists in the shared FTLB for a translation which would
613 * otherwise cause a TLB refill exception then the CPU will use the entry
614 * written by its sibling rather than triggering a refill & writing a matching
615 * TLB entry for itself.
616 *
617 * This is naturally only valid if a TLB entry is known to be suitable for use
618 * on all siblings in a CPU, and so it only takes effect when MMIDs are in use
619 * rather than ASIDs or when a TLB entry is marked global.
620 */
621# ifndef cpu_has_shared_ftlb_entries
622# define cpu_has_shared_ftlb_entries \
623 __isa_ge_and_opt(6, MIPS_CPU_SHARED_FTLB_ENTRIES)
624# endif
625#endif /* SMP */
626
627#ifndef cpu_has_shared_ftlb_ram
628# define cpu_has_shared_ftlb_ram 0
629#endif
630#ifndef cpu_has_shared_ftlb_entries
631# define cpu_has_shared_ftlb_entries 0
632#endif
633
634#ifdef CONFIG_MIPS_MT_SMP
635# define cpu_has_mipsmt_pertccounters \
636 __isa_lt_and_opt(6, MIPS_CPU_MT_PER_TC_PERF_COUNTERS)
637#else
638# define cpu_has_mipsmt_pertccounters 0
639#endif /* CONFIG_MIPS_MT_SMP */
640
641/*
642 * We only enable MMID support for configurations which natively support 64 bit
643 * atomics because getting good performance from the allocator relies upon
644 * efficient atomic64_*() functions.
645 */
646#ifndef cpu_has_mmid
647# ifdef CONFIG_GENERIC_ATOMIC64
648# define cpu_has_mmid 0
649# else
650# define cpu_has_mmid __isa_ge_and_opt(6, MIPS_CPU_MMID)
651# endif
652#endif
653
654#ifndef cpu_has_mm_sysad
655# define cpu_has_mm_sysad __opt(MIPS_CPU_MM_SYSAD)
656#endif
657
658#ifndef cpu_has_mm_full
659# define cpu_has_mm_full __opt(MIPS_CPU_MM_FULL)
660#endif
661
662/*
663 * Guest capabilities
664 */
665#ifndef cpu_guest_has_conf1
666#define cpu_guest_has_conf1 (cpu_data[0].guest.conf & (1 << 1))
667#endif
668#ifndef cpu_guest_has_conf2
669#define cpu_guest_has_conf2 (cpu_data[0].guest.conf & (1 << 2))
670#endif
671#ifndef cpu_guest_has_conf3
672#define cpu_guest_has_conf3 (cpu_data[0].guest.conf & (1 << 3))
673#endif
674#ifndef cpu_guest_has_conf4
675#define cpu_guest_has_conf4 (cpu_data[0].guest.conf & (1 << 4))
676#endif
677#ifndef cpu_guest_has_conf5
678#define cpu_guest_has_conf5 (cpu_data[0].guest.conf & (1 << 5))
679#endif
680#ifndef cpu_guest_has_conf6
681#define cpu_guest_has_conf6 (cpu_data[0].guest.conf & (1 << 6))
682#endif
683#ifndef cpu_guest_has_conf7
684#define cpu_guest_has_conf7 (cpu_data[0].guest.conf & (1 << 7))
685#endif
686#ifndef cpu_guest_has_fpu
687#define cpu_guest_has_fpu (cpu_data[0].guest.options & MIPS_CPU_FPU)
688#endif
689#ifndef cpu_guest_has_watch
690#define cpu_guest_has_watch (cpu_data[0].guest.options & MIPS_CPU_WATCH)
691#endif
692#ifndef cpu_guest_has_contextconfig
693#define cpu_guest_has_contextconfig (cpu_data[0].guest.options & MIPS_CPU_CTXTC)
694#endif
695#ifndef cpu_guest_has_segments
696#define cpu_guest_has_segments (cpu_data[0].guest.options & MIPS_CPU_SEGMENTS)
697#endif
698#ifndef cpu_guest_has_badinstr
699#define cpu_guest_has_badinstr (cpu_data[0].guest.options & MIPS_CPU_BADINSTR)
700#endif
701#ifndef cpu_guest_has_badinstrp
702#define cpu_guest_has_badinstrp (cpu_data[0].guest.options & MIPS_CPU_BADINSTRP)
703#endif
704#ifndef cpu_guest_has_htw
705#define cpu_guest_has_htw (cpu_data[0].guest.options & MIPS_CPU_HTW)
706#endif
707#ifndef cpu_guest_has_ldpte
708#define cpu_guest_has_ldpte (cpu_data[0].guest.options & MIPS_CPU_LDPTE)
709#endif
710#ifndef cpu_guest_has_mvh
711#define cpu_guest_has_mvh (cpu_data[0].guest.options & MIPS_CPU_MVH)
712#endif
713#ifndef cpu_guest_has_msa
714#define cpu_guest_has_msa (cpu_data[0].guest.ases & MIPS_ASE_MSA)
715#endif
716#ifndef cpu_guest_has_kscr
717#define cpu_guest_has_kscr(n) (cpu_data[0].guest.kscratch_mask & (1u << (n)))
718#endif
719#ifndef cpu_guest_has_rw_llb
720#define cpu_guest_has_rw_llb (cpu_has_mips_r6 || (cpu_data[0].guest.options & MIPS_CPU_RW_LLB))
721#endif
722#ifndef cpu_guest_has_perf
723#define cpu_guest_has_perf (cpu_data[0].guest.options & MIPS_CPU_PERF)
724#endif
725#ifndef cpu_guest_has_maar
726#define cpu_guest_has_maar (cpu_data[0].guest.options & MIPS_CPU_MAAR)
727#endif
728#ifndef cpu_guest_has_userlocal
729#define cpu_guest_has_userlocal (cpu_data[0].guest.options & MIPS_CPU_ULRI)
730#endif
731
732/*
733 * Guest dynamic capabilities
734 */
735#ifndef cpu_guest_has_dyn_fpu
736#define cpu_guest_has_dyn_fpu (cpu_data[0].guest.options_dyn & MIPS_CPU_FPU)
737#endif
738#ifndef cpu_guest_has_dyn_watch
739#define cpu_guest_has_dyn_watch (cpu_data[0].guest.options_dyn & MIPS_CPU_WATCH)
740#endif
741#ifndef cpu_guest_has_dyn_contextconfig
742#define cpu_guest_has_dyn_contextconfig (cpu_data[0].guest.options_dyn & MIPS_CPU_CTXTC)
743#endif
744#ifndef cpu_guest_has_dyn_perf
745#define cpu_guest_has_dyn_perf (cpu_data[0].guest.options_dyn & MIPS_CPU_PERF)
746#endif
747#ifndef cpu_guest_has_dyn_msa
748#define cpu_guest_has_dyn_msa (cpu_data[0].guest.ases_dyn & MIPS_ASE_MSA)
749#endif
750#ifndef cpu_guest_has_dyn_maar
751#define cpu_guest_has_dyn_maar (cpu_data[0].guest.options_dyn & MIPS_CPU_MAAR)
752#endif
753
754#endif /* __ASM_CPU_FEATURES_H */
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2003, 2004 Ralf Baechle
7 * Copyright (C) 2004 Maciej W. Rozycki
8 */
9#ifndef __ASM_CPU_FEATURES_H
10#define __ASM_CPU_FEATURES_H
11
12#include <asm/cpu.h>
13#include <asm/cpu-info.h>
14#include <asm/isa-rev.h>
15#include <cpu-feature-overrides.h>
16
17#define __ase(ase) (cpu_data[0].ases & (ase))
18#define __isa(isa) (cpu_data[0].isa_level & (isa))
19#define __opt(opt) (cpu_data[0].options & (opt))
20
21/*
22 * Check if MIPS_ISA_REV is >= isa *and* an option or ASE is detected during
23 * boot (typically by cpu_probe()).
24 *
25 * Note that these should only be used in cases where a kernel built for an
26 * older ISA *cannot* run on a CPU which supports the feature in question. For
27 * example this may be used for features introduced with MIPSr6, since a kernel
28 * built for an older ISA cannot run on a MIPSr6 CPU. This should not be used
29 * for MIPSr2 features however, since a MIPSr1 or earlier kernel might run on a
30 * MIPSr2 CPU.
31 */
32#define __isa_ge_and_ase(isa, ase) ((MIPS_ISA_REV >= (isa)) && __ase(ase))
33#define __isa_ge_and_opt(isa, opt) ((MIPS_ISA_REV >= (isa)) && __opt(opt))
34
35/*
36 * Check if MIPS_ISA_REV is >= isa *or* an option or ASE is detected during
37 * boot (typically by cpu_probe()).
38 *
39 * These are for use with features that are optional up until a particular ISA
40 * revision & then become required.
41 */
42#define __isa_ge_or_ase(isa, ase) ((MIPS_ISA_REV >= (isa)) || __ase(ase))
43#define __isa_ge_or_opt(isa, opt) ((MIPS_ISA_REV >= (isa)) || __opt(opt))
44
45/*
46 * Check if MIPS_ISA_REV is < isa *and* an option or ASE is detected during
47 * boot (typically by cpu_probe()).
48 *
49 * These are for use with features that are optional up until a particular ISA
50 * revision & are then removed - ie. no longer present in any CPU implementing
51 * the given ISA revision.
52 */
53#define __isa_lt_and_ase(isa, ase) ((MIPS_ISA_REV < (isa)) && __ase(ase))
54#define __isa_lt_and_opt(isa, opt) ((MIPS_ISA_REV < (isa)) && __opt(opt))
55
56/*
57 * Similarly allow for ISA level checks that take into account knowledge of the
58 * ISA targeted by the kernel build, provided by MIPS_ISA_REV.
59 */
60#define __isa_ge_and_flag(isa, flag) ((MIPS_ISA_REV >= (isa)) && __isa(flag))
61#define __isa_ge_or_flag(isa, flag) ((MIPS_ISA_REV >= (isa)) || __isa(flag))
62#define __isa_lt_and_flag(isa, flag) ((MIPS_ISA_REV < (isa)) && __isa(flag))
63#define __isa_range(ge, lt) \
64 ((MIPS_ISA_REV >= (ge)) && (MIPS_ISA_REV < (lt)))
65#define __isa_range_or_flag(ge, lt, flag) \
66 (__isa_range(ge, lt) || ((MIPS_ISA_REV < (lt)) && __isa(flag)))
67#define __isa_range_and_ase(ge, lt, ase) \
68 (__isa_range(ge, lt) && __ase(ase))
69
70/*
71 * SMP assumption: Options of CPU 0 are a superset of all processors.
72 * This is true for all known MIPS systems.
73 */
74#ifndef cpu_has_tlb
75#define cpu_has_tlb __opt(MIPS_CPU_TLB)
76#endif
77#ifndef cpu_has_ftlb
78#define cpu_has_ftlb __opt(MIPS_CPU_FTLB)
79#endif
80#ifndef cpu_has_tlbinv
81#define cpu_has_tlbinv __opt(MIPS_CPU_TLBINV)
82#endif
83#ifndef cpu_has_segments
84#define cpu_has_segments __opt(MIPS_CPU_SEGMENTS)
85#endif
86#ifndef cpu_has_eva
87#define cpu_has_eva __opt(MIPS_CPU_EVA)
88#endif
89#ifndef cpu_has_htw
90#define cpu_has_htw __opt(MIPS_CPU_HTW)
91#endif
92#ifndef cpu_has_ldpte
93#define cpu_has_ldpte __opt(MIPS_CPU_LDPTE)
94#endif
95#ifndef cpu_has_rixiex
96#define cpu_has_rixiex __isa_ge_or_opt(6, MIPS_CPU_RIXIEX)
97#endif
98#ifndef cpu_has_maar
99#define cpu_has_maar __opt(MIPS_CPU_MAAR)
100#endif
101#ifndef cpu_has_rw_llb
102#define cpu_has_rw_llb __isa_ge_or_opt(6, MIPS_CPU_RW_LLB)
103#endif
104
105/*
106 * For the moment we don't consider R6000 and R8000 so we can assume that
107 * anything that doesn't support R4000-style exceptions and interrupts is
108 * R3000-like. Users should still treat these two macro definitions as
109 * opaque.
110 */
111#ifndef cpu_has_3kex
112#define cpu_has_3kex (!cpu_has_4kex)
113#endif
114#ifndef cpu_has_4kex
115#define cpu_has_4kex __isa_ge_or_opt(1, MIPS_CPU_4KEX)
116#endif
117#ifndef cpu_has_3k_cache
118#define cpu_has_3k_cache __isa_lt_and_opt(1, MIPS_CPU_3K_CACHE)
119#endif
120#ifndef cpu_has_4k_cache
121#define cpu_has_4k_cache __isa_ge_or_opt(1, MIPS_CPU_4K_CACHE)
122#endif
123#ifndef cpu_has_octeon_cache
124#define cpu_has_octeon_cache 0
125#endif
126/* Don't override `cpu_has_fpu' to 1 or the "nofpu" option won't work. */
127#ifndef cpu_has_fpu
128# ifdef CONFIG_MIPS_FP_SUPPORT
129# define cpu_has_fpu (current_cpu_data.options & MIPS_CPU_FPU)
130# define raw_cpu_has_fpu (raw_current_cpu_data.options & MIPS_CPU_FPU)
131# else
132# define cpu_has_fpu 0
133# define raw_cpu_has_fpu 0
134# endif
135#else
136# if cpu_has_fpu
137# error "Forcing `cpu_has_fpu' to non-zero is not supported"
138# endif
139# define raw_cpu_has_fpu cpu_has_fpu
140#endif
141#ifndef cpu_has_32fpr
142#define cpu_has_32fpr __isa_ge_or_opt(1, MIPS_CPU_32FPR)
143#endif
144#ifndef cpu_has_counter
145#define cpu_has_counter __opt(MIPS_CPU_COUNTER)
146#endif
147#ifndef cpu_has_watch
148#define cpu_has_watch __opt(MIPS_CPU_WATCH)
149#endif
150#ifndef cpu_has_divec
151#define cpu_has_divec __isa_ge_or_opt(1, MIPS_CPU_DIVEC)
152#endif
153#ifndef cpu_has_vce
154#define cpu_has_vce __opt(MIPS_CPU_VCE)
155#endif
156#ifndef cpu_has_cache_cdex_p
157#define cpu_has_cache_cdex_p __opt(MIPS_CPU_CACHE_CDEX_P)
158#endif
159#ifndef cpu_has_cache_cdex_s
160#define cpu_has_cache_cdex_s __opt(MIPS_CPU_CACHE_CDEX_S)
161#endif
162#ifndef cpu_has_prefetch
163#define cpu_has_prefetch __isa_ge_or_opt(1, MIPS_CPU_PREFETCH)
164#endif
165#ifndef cpu_has_mcheck
166#define cpu_has_mcheck __isa_ge_or_opt(1, MIPS_CPU_MCHECK)
167#endif
168#ifndef cpu_has_ejtag
169#define cpu_has_ejtag __opt(MIPS_CPU_EJTAG)
170#endif
171#ifndef cpu_has_llsc
172#define cpu_has_llsc __isa_ge_or_opt(1, MIPS_CPU_LLSC)
173#endif
174#ifndef kernel_uses_llsc
175#define kernel_uses_llsc cpu_has_llsc
176#endif
177#ifndef cpu_has_guestctl0ext
178#define cpu_has_guestctl0ext __opt(MIPS_CPU_GUESTCTL0EXT)
179#endif
180#ifndef cpu_has_guestctl1
181#define cpu_has_guestctl1 __opt(MIPS_CPU_GUESTCTL1)
182#endif
183#ifndef cpu_has_guestctl2
184#define cpu_has_guestctl2 __opt(MIPS_CPU_GUESTCTL2)
185#endif
186#ifndef cpu_has_guestid
187#define cpu_has_guestid __opt(MIPS_CPU_GUESTID)
188#endif
189#ifndef cpu_has_drg
190#define cpu_has_drg __opt(MIPS_CPU_DRG)
191#endif
192#ifndef cpu_has_mips16
193#define cpu_has_mips16 __isa_lt_and_ase(6, MIPS_ASE_MIPS16)
194#endif
195#ifndef cpu_has_mips16e2
196#define cpu_has_mips16e2 __isa_lt_and_ase(6, MIPS_ASE_MIPS16E2)
197#endif
198#ifndef cpu_has_mdmx
199#define cpu_has_mdmx __isa_lt_and_ase(6, MIPS_ASE_MDMX)
200#endif
201#ifndef cpu_has_mips3d
202#define cpu_has_mips3d __isa_lt_and_ase(6, MIPS_ASE_MIPS3D)
203#endif
204#ifndef cpu_has_smartmips
205#define cpu_has_smartmips __isa_lt_and_ase(6, MIPS_ASE_SMARTMIPS)
206#endif
207
208#ifndef cpu_has_rixi
209#define cpu_has_rixi __isa_ge_or_opt(6, MIPS_CPU_RIXI)
210#endif
211
212#ifndef cpu_has_mmips
213# if defined(__mips_micromips)
214# define cpu_has_mmips 1
215# elif defined(CONFIG_SYS_SUPPORTS_MICROMIPS)
216# define cpu_has_mmips __opt(MIPS_CPU_MICROMIPS)
217# else
218# define cpu_has_mmips 0
219# endif
220#endif
221
222#ifndef cpu_has_lpa
223#define cpu_has_lpa __opt(MIPS_CPU_LPA)
224#endif
225#ifndef cpu_has_mvh
226#define cpu_has_mvh __opt(MIPS_CPU_MVH)
227#endif
228#ifndef cpu_has_xpa
229#define cpu_has_xpa (cpu_has_lpa && cpu_has_mvh)
230#endif
231#ifndef cpu_has_vtag_icache
232#define cpu_has_vtag_icache (cpu_data[0].icache.flags & MIPS_CACHE_VTAG)
233#endif
234#ifndef cpu_has_dc_aliases
235#define cpu_has_dc_aliases (cpu_data[0].dcache.flags & MIPS_CACHE_ALIASES)
236#endif
237#ifndef cpu_has_ic_fills_f_dc
238#define cpu_has_ic_fills_f_dc (cpu_data[0].icache.flags & MIPS_CACHE_IC_F_DC)
239#endif
240#ifndef cpu_has_pindexed_dcache
241#define cpu_has_pindexed_dcache (cpu_data[0].dcache.flags & MIPS_CACHE_PINDEX)
242#endif
243
244/*
245 * I-Cache snoops remote store. This only matters on SMP. Some multiprocessors
246 * such as the R10000 have I-Caches that snoop local stores; the embedded ones
247 * don't. For maintaining I-cache coherency this means we need to flush the
248 * D-cache all the way back to whever the I-cache does refills from, so the
249 * I-cache has a chance to see the new data at all. Then we have to flush the
250 * I-cache also.
251 * Note we may have been rescheduled and may no longer be running on the CPU
252 * that did the store so we can't optimize this into only doing the flush on
253 * the local CPU.
254 */
255#ifndef cpu_icache_snoops_remote_store
256#ifdef CONFIG_SMP
257#define cpu_icache_snoops_remote_store (cpu_data[0].icache.flags & MIPS_IC_SNOOPS_REMOTE)
258#else
259#define cpu_icache_snoops_remote_store 1
260#endif
261#endif
262
263#ifndef cpu_has_mips_1
264# define cpu_has_mips_1 (MIPS_ISA_REV < 6)
265#endif
266#ifndef cpu_has_mips_2
267# define cpu_has_mips_2 __isa_lt_and_flag(6, MIPS_CPU_ISA_II)
268#endif
269#ifndef cpu_has_mips_3
270# define cpu_has_mips_3 __isa_lt_and_flag(6, MIPS_CPU_ISA_III)
271#endif
272#ifndef cpu_has_mips_4
273# define cpu_has_mips_4 __isa_lt_and_flag(6, MIPS_CPU_ISA_IV)
274#endif
275#ifndef cpu_has_mips_5
276# define cpu_has_mips_5 __isa_lt_and_flag(6, MIPS_CPU_ISA_V)
277#endif
278#ifndef cpu_has_mips32r1
279# define cpu_has_mips32r1 __isa_range_or_flag(1, 6, MIPS_CPU_ISA_M32R1)
280#endif
281#ifndef cpu_has_mips32r2
282# define cpu_has_mips32r2 __isa_range_or_flag(2, 6, MIPS_CPU_ISA_M32R2)
283#endif
284#ifndef cpu_has_mips32r5
285# define cpu_has_mips32r5 __isa_range_or_flag(5, 6, MIPS_CPU_ISA_M32R5)
286#endif
287#ifndef cpu_has_mips32r6
288# define cpu_has_mips32r6 __isa_ge_or_flag(6, MIPS_CPU_ISA_M32R6)
289#endif
290#ifndef cpu_has_mips64r1
291# define cpu_has_mips64r1 (cpu_has_64bits && \
292 __isa_range_or_flag(1, 6, MIPS_CPU_ISA_M64R1))
293#endif
294#ifndef cpu_has_mips64r2
295# define cpu_has_mips64r2 (cpu_has_64bits && \
296 __isa_range_or_flag(2, 6, MIPS_CPU_ISA_M64R2))
297#endif
298#ifndef cpu_has_mips64r5
299# define cpu_has_mips64r5 (cpu_has_64bits && \
300 __isa_range_or_flag(5, 6, MIPS_CPU_ISA_M64R5))
301#endif
302#ifndef cpu_has_mips64r6
303# define cpu_has_mips64r6 __isa_ge_and_flag(6, MIPS_CPU_ISA_M64R6)
304#endif
305
306/*
307 * Shortcuts ...
308 */
309#define cpu_has_mips_2_3_4_5 (cpu_has_mips_2 | cpu_has_mips_3_4_5)
310#define cpu_has_mips_3_4_5 (cpu_has_mips_3 | cpu_has_mips_4_5)
311#define cpu_has_mips_4_5 (cpu_has_mips_4 | cpu_has_mips_5)
312
313#define cpu_has_mips_2_3_4_5_r (cpu_has_mips_2 | cpu_has_mips_3_4_5_r)
314#define cpu_has_mips_3_4_5_r (cpu_has_mips_3 | cpu_has_mips_4_5_r)
315#define cpu_has_mips_4_5_r (cpu_has_mips_4 | cpu_has_mips_5_r)
316#define cpu_has_mips_5_r (cpu_has_mips_5 | cpu_has_mips_r)
317
318#define cpu_has_mips_3_4_5_64_r2_r6 \
319 (cpu_has_mips_3 | cpu_has_mips_4_5_64_r2_r6)
320#define cpu_has_mips_4_5_64_r2_r6 \
321 (cpu_has_mips_4_5 | cpu_has_mips64r1 | \
322 cpu_has_mips_r2 | cpu_has_mips_r5 | \
323 cpu_has_mips_r6)
324
325#define cpu_has_mips32 (cpu_has_mips32r1 | cpu_has_mips32r2 | \
326 cpu_has_mips32r5 | cpu_has_mips32r6)
327#define cpu_has_mips64 (cpu_has_mips64r1 | cpu_has_mips64r2 | \
328 cpu_has_mips64r5 | cpu_has_mips64r6)
329#define cpu_has_mips_r1 (cpu_has_mips32r1 | cpu_has_mips64r1)
330#define cpu_has_mips_r2 (cpu_has_mips32r2 | cpu_has_mips64r2)
331#define cpu_has_mips_r5 (cpu_has_mips32r5 | cpu_has_mips64r5)
332#define cpu_has_mips_r6 (cpu_has_mips32r6 | cpu_has_mips64r6)
333#define cpu_has_mips_r (cpu_has_mips32r1 | cpu_has_mips32r2 | \
334 cpu_has_mips32r5 | cpu_has_mips32r6 | \
335 cpu_has_mips64r1 | cpu_has_mips64r2 | \
336 cpu_has_mips64r5 | cpu_has_mips64r6)
337
338/* MIPSR2 - MIPSR6 have a lot of similarities */
339#define cpu_has_mips_r2_r6 (cpu_has_mips_r2 | cpu_has_mips_r5 | \
340 cpu_has_mips_r6)
341
342/*
343 * cpu_has_mips_r2_exec_hazard - return if IHB is required on current processor
344 *
345 * Returns non-zero value if the current processor implementation requires
346 * an IHB instruction to deal with an instruction hazard as per MIPS R2
347 * architecture specification, zero otherwise.
348 */
349#ifndef cpu_has_mips_r2_exec_hazard
350#define cpu_has_mips_r2_exec_hazard \
351({ \
352 int __res; \
353 \
354 switch (current_cpu_type()) { \
355 case CPU_M14KC: \
356 case CPU_74K: \
357 case CPU_1074K: \
358 case CPU_PROAPTIV: \
359 case CPU_P5600: \
360 case CPU_M5150: \
361 case CPU_QEMU_GENERIC: \
362 case CPU_CAVIUM_OCTEON: \
363 case CPU_CAVIUM_OCTEON_PLUS: \
364 case CPU_CAVIUM_OCTEON2: \
365 case CPU_CAVIUM_OCTEON3: \
366 __res = 0; \
367 break; \
368 \
369 default: \
370 __res = 1; \
371 } \
372 \
373 __res; \
374})
375#endif
376
377/*
378 * MIPS32, MIPS64, VR5500, IDT32332, IDT32334 and maybe a few other
379 * pre-MIPS32/MIPS64 processors have CLO, CLZ. The IDT RC64574 is 64-bit and
380 * has CLO and CLZ but not DCLO nor DCLZ. For 64-bit kernels
381 * cpu_has_clo_clz also indicates the availability of DCLO and DCLZ.
382 */
383#ifndef cpu_has_clo_clz
384#define cpu_has_clo_clz cpu_has_mips_r
385#endif
386
387/*
388 * MIPS32 R2, MIPS64 R2, Loongson 3A and Octeon have WSBH.
389 * MIPS64 R2, Loongson 3A and Octeon have WSBH, DSBH and DSHD.
390 * This indicates the availability of WSBH and in case of 64 bit CPUs also
391 * DSBH and DSHD.
392 */
393#ifndef cpu_has_wsbh
394#define cpu_has_wsbh cpu_has_mips_r2
395#endif
396
397#ifndef cpu_has_dsp
398#define cpu_has_dsp __ase(MIPS_ASE_DSP)
399#endif
400
401#ifndef cpu_has_dsp2
402#define cpu_has_dsp2 __ase(MIPS_ASE_DSP2P)
403#endif
404
405#ifndef cpu_has_dsp3
406#define cpu_has_dsp3 __ase(MIPS_ASE_DSP3)
407#endif
408
409#ifndef cpu_has_loongson_mmi
410#define cpu_has_loongson_mmi __ase(MIPS_ASE_LOONGSON_MMI)
411#endif
412
413#ifndef cpu_has_loongson_cam
414#define cpu_has_loongson_cam __ase(MIPS_ASE_LOONGSON_CAM)
415#endif
416
417#ifndef cpu_has_loongson_ext
418#define cpu_has_loongson_ext __ase(MIPS_ASE_LOONGSON_EXT)
419#endif
420
421#ifndef cpu_has_loongson_ext2
422#define cpu_has_loongson_ext2 __ase(MIPS_ASE_LOONGSON_EXT2)
423#endif
424
425#ifndef cpu_has_mipsmt
426#define cpu_has_mipsmt __isa_range_and_ase(2, 6, MIPS_ASE_MIPSMT)
427#endif
428
429#ifndef cpu_has_vp
430#define cpu_has_vp __isa_ge_and_opt(6, MIPS_CPU_VP)
431#endif
432
433#ifndef cpu_has_userlocal
434#define cpu_has_userlocal __isa_ge_or_opt(6, MIPS_CPU_ULRI)
435#endif
436
437#ifdef CONFIG_32BIT
438# ifndef cpu_has_nofpuex
439# define cpu_has_nofpuex __isa_lt_and_opt(1, MIPS_CPU_NOFPUEX)
440# endif
441# ifndef cpu_has_64bits
442# define cpu_has_64bits (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
443# endif
444# ifndef cpu_has_64bit_zero_reg
445# define cpu_has_64bit_zero_reg (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
446# endif
447# ifndef cpu_has_64bit_gp_regs
448# define cpu_has_64bit_gp_regs 0
449# endif
450# ifndef cpu_vmbits
451# define cpu_vmbits 31
452# endif
453#endif
454
455#ifdef CONFIG_64BIT
456# ifndef cpu_has_nofpuex
457# define cpu_has_nofpuex 0
458# endif
459# ifndef cpu_has_64bits
460# define cpu_has_64bits 1
461# endif
462# ifndef cpu_has_64bit_zero_reg
463# define cpu_has_64bit_zero_reg 1
464# endif
465# ifndef cpu_has_64bit_gp_regs
466# define cpu_has_64bit_gp_regs 1
467# endif
468# ifndef cpu_vmbits
469# define cpu_vmbits cpu_data[0].vmbits
470# define __NEED_VMBITS_PROBE
471# endif
472#endif
473
474#if defined(CONFIG_CPU_MIPSR2_IRQ_VI) && !defined(cpu_has_vint)
475# define cpu_has_vint __opt(MIPS_CPU_VINT)
476#elif !defined(cpu_has_vint)
477# define cpu_has_vint 0
478#endif
479
480#if defined(CONFIG_CPU_MIPSR2_IRQ_EI) && !defined(cpu_has_veic)
481# define cpu_has_veic __opt(MIPS_CPU_VEIC)
482#elif !defined(cpu_has_veic)
483# define cpu_has_veic 0
484#endif
485
486#ifndef cpu_has_inclusive_pcaches
487#define cpu_has_inclusive_pcaches __opt(MIPS_CPU_INCLUSIVE_CACHES)
488#endif
489
490#ifndef cpu_dcache_line_size
491#define cpu_dcache_line_size() cpu_data[0].dcache.linesz
492#endif
493#ifndef cpu_icache_line_size
494#define cpu_icache_line_size() cpu_data[0].icache.linesz
495#endif
496#ifndef cpu_scache_line_size
497#define cpu_scache_line_size() cpu_data[0].scache.linesz
498#endif
499#ifndef cpu_tcache_line_size
500#define cpu_tcache_line_size() cpu_data[0].tcache.linesz
501#endif
502
503#ifndef cpu_hwrena_impl_bits
504#define cpu_hwrena_impl_bits 0
505#endif
506
507#ifndef cpu_has_perf_cntr_intr_bit
508#define cpu_has_perf_cntr_intr_bit __opt(MIPS_CPU_PCI)
509#endif
510
511#ifndef cpu_has_vz
512#define cpu_has_vz __ase(MIPS_ASE_VZ)
513#endif
514
515#if defined(CONFIG_CPU_HAS_MSA) && !defined(cpu_has_msa)
516# define cpu_has_msa __ase(MIPS_ASE_MSA)
517#elif !defined(cpu_has_msa)
518# define cpu_has_msa 0
519#endif
520
521#ifndef cpu_has_ufr
522# define cpu_has_ufr __opt(MIPS_CPU_UFR)
523#endif
524
525#ifndef cpu_has_fre
526# define cpu_has_fre __opt(MIPS_CPU_FRE)
527#endif
528
529#ifndef cpu_has_cdmm
530# define cpu_has_cdmm __opt(MIPS_CPU_CDMM)
531#endif
532
533#ifndef cpu_has_small_pages
534# define cpu_has_small_pages __opt(MIPS_CPU_SP)
535#endif
536
537#ifndef cpu_has_nan_legacy
538#define cpu_has_nan_legacy __isa_lt_and_opt(6, MIPS_CPU_NAN_LEGACY)
539#endif
540#ifndef cpu_has_nan_2008
541#define cpu_has_nan_2008 __isa_ge_or_opt(6, MIPS_CPU_NAN_2008)
542#endif
543
544#ifndef cpu_has_ebase_wg
545# define cpu_has_ebase_wg __opt(MIPS_CPU_EBASE_WG)
546#endif
547
548#ifndef cpu_has_badinstr
549# define cpu_has_badinstr __isa_ge_or_opt(6, MIPS_CPU_BADINSTR)
550#endif
551
552#ifndef cpu_has_badinstrp
553# define cpu_has_badinstrp __isa_ge_or_opt(6, MIPS_CPU_BADINSTRP)
554#endif
555
556#ifndef cpu_has_contextconfig
557# define cpu_has_contextconfig __opt(MIPS_CPU_CTXTC)
558#endif
559
560#ifndef cpu_has_perf
561# define cpu_has_perf __opt(MIPS_CPU_PERF)
562#endif
563
564#ifndef cpu_has_mac2008_only
565# define cpu_has_mac2008_only __opt(MIPS_CPU_MAC_2008_ONLY)
566#endif
567
568#ifndef cpu_has_ftlbparex
569# define cpu_has_ftlbparex __opt(MIPS_CPU_FTLBPAREX)
570#endif
571
572#ifndef cpu_has_gsexcex
573# define cpu_has_gsexcex __opt(MIPS_CPU_GSEXCEX)
574#endif
575
576#ifdef CONFIG_SMP
577/*
578 * Some systems share FTLB RAMs between threads within a core (siblings in
579 * kernel parlance). This means that FTLB entries may become invalid at almost
580 * any point when an entry is evicted due to a sibling thread writing an entry
581 * to the shared FTLB RAM.
582 *
583 * This is only relevant to SMP systems, and the only systems that exhibit this
584 * property implement MIPSr6 or higher so we constrain support for this to
585 * kernels that will run on such systems.
586 */
587# ifndef cpu_has_shared_ftlb_ram
588# define cpu_has_shared_ftlb_ram \
589 __isa_ge_and_opt(6, MIPS_CPU_SHARED_FTLB_RAM)
590# endif
591
592/*
593 * Some systems take this a step further & share FTLB entries between siblings.
594 * This is implemented as TLB writes happening as usual, but if an entry
595 * written by a sibling exists in the shared FTLB for a translation which would
596 * otherwise cause a TLB refill exception then the CPU will use the entry
597 * written by its sibling rather than triggering a refill & writing a matching
598 * TLB entry for itself.
599 *
600 * This is naturally only valid if a TLB entry is known to be suitable for use
601 * on all siblings in a CPU, and so it only takes effect when MMIDs are in use
602 * rather than ASIDs or when a TLB entry is marked global.
603 */
604# ifndef cpu_has_shared_ftlb_entries
605# define cpu_has_shared_ftlb_entries \
606 __isa_ge_and_opt(6, MIPS_CPU_SHARED_FTLB_ENTRIES)
607# endif
608#endif /* SMP */
609
610#ifndef cpu_has_shared_ftlb_ram
611# define cpu_has_shared_ftlb_ram 0
612#endif
613#ifndef cpu_has_shared_ftlb_entries
614# define cpu_has_shared_ftlb_entries 0
615#endif
616
617#ifdef CONFIG_MIPS_MT_SMP
618# define cpu_has_mipsmt_pertccounters \
619 __isa_lt_and_opt(6, MIPS_CPU_MT_PER_TC_PERF_COUNTERS)
620#else
621# define cpu_has_mipsmt_pertccounters 0
622#endif /* CONFIG_MIPS_MT_SMP */
623
624/*
625 * We only enable MMID support for configurations which natively support 64 bit
626 * atomics because getting good performance from the allocator relies upon
627 * efficient atomic64_*() functions.
628 */
629#ifndef cpu_has_mmid
630# ifdef CONFIG_GENERIC_ATOMIC64
631# define cpu_has_mmid 0
632# else
633# define cpu_has_mmid __isa_ge_and_opt(6, MIPS_CPU_MMID)
634# endif
635#endif
636
637#ifndef cpu_has_mm_sysad
638# define cpu_has_mm_sysad __opt(MIPS_CPU_MM_SYSAD)
639#endif
640
641#ifndef cpu_has_mm_full
642# define cpu_has_mm_full __opt(MIPS_CPU_MM_FULL)
643#endif
644
645/*
646 * Guest capabilities
647 */
648#ifndef cpu_guest_has_conf1
649#define cpu_guest_has_conf1 (cpu_data[0].guest.conf & (1 << 1))
650#endif
651#ifndef cpu_guest_has_conf2
652#define cpu_guest_has_conf2 (cpu_data[0].guest.conf & (1 << 2))
653#endif
654#ifndef cpu_guest_has_conf3
655#define cpu_guest_has_conf3 (cpu_data[0].guest.conf & (1 << 3))
656#endif
657#ifndef cpu_guest_has_conf4
658#define cpu_guest_has_conf4 (cpu_data[0].guest.conf & (1 << 4))
659#endif
660#ifndef cpu_guest_has_conf5
661#define cpu_guest_has_conf5 (cpu_data[0].guest.conf & (1 << 5))
662#endif
663#ifndef cpu_guest_has_conf6
664#define cpu_guest_has_conf6 (cpu_data[0].guest.conf & (1 << 6))
665#endif
666#ifndef cpu_guest_has_conf7
667#define cpu_guest_has_conf7 (cpu_data[0].guest.conf & (1 << 7))
668#endif
669#ifndef cpu_guest_has_fpu
670#define cpu_guest_has_fpu (cpu_data[0].guest.options & MIPS_CPU_FPU)
671#endif
672#ifndef cpu_guest_has_watch
673#define cpu_guest_has_watch (cpu_data[0].guest.options & MIPS_CPU_WATCH)
674#endif
675#ifndef cpu_guest_has_contextconfig
676#define cpu_guest_has_contextconfig (cpu_data[0].guest.options & MIPS_CPU_CTXTC)
677#endif
678#ifndef cpu_guest_has_segments
679#define cpu_guest_has_segments (cpu_data[0].guest.options & MIPS_CPU_SEGMENTS)
680#endif
681#ifndef cpu_guest_has_badinstr
682#define cpu_guest_has_badinstr (cpu_data[0].guest.options & MIPS_CPU_BADINSTR)
683#endif
684#ifndef cpu_guest_has_badinstrp
685#define cpu_guest_has_badinstrp (cpu_data[0].guest.options & MIPS_CPU_BADINSTRP)
686#endif
687#ifndef cpu_guest_has_htw
688#define cpu_guest_has_htw (cpu_data[0].guest.options & MIPS_CPU_HTW)
689#endif
690#ifndef cpu_guest_has_ldpte
691#define cpu_guest_has_ldpte (cpu_data[0].guest.options & MIPS_CPU_LDPTE)
692#endif
693#ifndef cpu_guest_has_mvh
694#define cpu_guest_has_mvh (cpu_data[0].guest.options & MIPS_CPU_MVH)
695#endif
696#ifndef cpu_guest_has_msa
697#define cpu_guest_has_msa (cpu_data[0].guest.ases & MIPS_ASE_MSA)
698#endif
699#ifndef cpu_guest_has_kscr
700#define cpu_guest_has_kscr(n) (cpu_data[0].guest.kscratch_mask & (1u << (n)))
701#endif
702#ifndef cpu_guest_has_rw_llb
703#define cpu_guest_has_rw_llb (cpu_has_mips_r6 || (cpu_data[0].guest.options & MIPS_CPU_RW_LLB))
704#endif
705#ifndef cpu_guest_has_perf
706#define cpu_guest_has_perf (cpu_data[0].guest.options & MIPS_CPU_PERF)
707#endif
708#ifndef cpu_guest_has_maar
709#define cpu_guest_has_maar (cpu_data[0].guest.options & MIPS_CPU_MAAR)
710#endif
711#ifndef cpu_guest_has_userlocal
712#define cpu_guest_has_userlocal (cpu_data[0].guest.options & MIPS_CPU_ULRI)
713#endif
714
715/*
716 * Guest dynamic capabilities
717 */
718#ifndef cpu_guest_has_dyn_fpu
719#define cpu_guest_has_dyn_fpu (cpu_data[0].guest.options_dyn & MIPS_CPU_FPU)
720#endif
721#ifndef cpu_guest_has_dyn_watch
722#define cpu_guest_has_dyn_watch (cpu_data[0].guest.options_dyn & MIPS_CPU_WATCH)
723#endif
724#ifndef cpu_guest_has_dyn_contextconfig
725#define cpu_guest_has_dyn_contextconfig (cpu_data[0].guest.options_dyn & MIPS_CPU_CTXTC)
726#endif
727#ifndef cpu_guest_has_dyn_perf
728#define cpu_guest_has_dyn_perf (cpu_data[0].guest.options_dyn & MIPS_CPU_PERF)
729#endif
730#ifndef cpu_guest_has_dyn_msa
731#define cpu_guest_has_dyn_msa (cpu_data[0].guest.ases_dyn & MIPS_ASE_MSA)
732#endif
733#ifndef cpu_guest_has_dyn_maar
734#define cpu_guest_has_dyn_maar (cpu_data[0].guest.options_dyn & MIPS_CPU_MAAR)
735#endif
736
737#endif /* __ASM_CPU_FEATURES_H */