1 /* $NetBSD: cpufunc.h,v 1.28 2024/12/30 19:13:48 jmcneill Exp $ */ 2 3 /* 4 * Copyright (c) 2017 Ryo Shimizu 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 25 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef _AARCH64_CPUFUNC_H_ 30 #define _AARCH64_CPUFUNC_H_ 31 32 #ifdef _KERNEL 33 34 #include <arm/armreg.h> 35 #include <sys/device_if.h> 36 37 #include <sys/cpu.h> 38 39 #include <uvm/uvm_extern.h> 40 #include <uvm/pmap/pmap_devmap.h> 41 42 extern u_int aarch64_cache_vindexsize; /* cachesize/way (VIVT/VIPT) */ 43 extern u_int aarch64_cache_prefer_mask; 44 extern u_int cputype; /* compat arm */ 45 46 extern int aarch64_bti_enabled; 47 extern int aarch64_hafdbs_enabled; 48 extern int aarch64_pan_enabled; 49 extern int aarch64_pac_enabled; 50 51 void aarch64_hafdbs_init(int); 52 void aarch64_pan_init(int); 53 int aarch64_pac_init(int); 54 55 void aarch64_cpu_idle_wfi(void); 56 57 int set_cpufuncs(void); 58 int aarch64_setcpufuncs(struct cpu_info *); 59 void aarch64_getcacheinfo(struct cpu_info *); 60 void aarch64_parsecacheinfo(struct cpu_info *); 61 void aarch64_printcacheinfo(device_t, struct cpu_info *); 62 63 void aarch64_dcache_wbinv_all(void); 64 void aarch64_dcache_inv_all(void); 65 void aarch64_dcache_wb_all(void); 66 void aarch64_icache_inv_all(void); 67 68 /* cache op in cpufunc_asm_armv8.S */ 69 void aarch64_nullop(void); 70 uint32_t aarch64_cpuid(void); 71 void aarch64_icache_sync_range(vaddr_t, vsize_t); 72 void aarch64_icache_inv_range(vaddr_t, vsize_t); 73 void aarch64_icache_barrier_range(vaddr_t, vsize_t); 74 void aarch64_idcache_wbinv_range(vaddr_t, vsize_t); 75 void aarch64_dcache_wbinv_range(vaddr_t, vsize_t); 76 void aarch64_dcache_inv_range(vaddr_t, vsize_t); 77 void aarch64_dcache_wb_range(vaddr_t, vsize_t); 78 void aarch64_icache_inv_all(void); 79 void aarch64_drain_writebuf(void); 80 81 /* tlb op in cpufunc_asm_armv8.S */ 82 #define cpu_set_ttbr0(t) curcpu()->ci_cpufuncs.cf_set_ttbr0((t)) 83 void aarch64_set_ttbr0(uint64_t); 84 void aarch64_set_ttbr0_thunderx(uint64_t); 85 void aarch64_tlbi_all(void); /* all ASID, all VA */ 86 void aarch64_tlbi_by_asid(int); /* an ASID, all VA */ 87 void aarch64_tlbi_by_va(vaddr_t); /* all ASID, a VA */ 88 void aarch64_tlbi_by_va_ll(vaddr_t); /* all ASID, a VA, lastlevel */ 89 void aarch64_tlbi_by_asid_va(int, vaddr_t); /* an ASID, a VA */ 90 void aarch64_tlbi_by_asid_va_ll(int, vaddr_t); /* an ASID, a VA, lastlevel */ 91 92 /* misc */ 93 #define cpu_idnum() aarch64_cpuid() 94 95 /* cache op */ 96 #define cpu_dcache_wbinv_all() aarch64_dcache_wbinv_all() 97 #define cpu_dcache_inv_all() aarch64_dcache_inv_all() 98 #define cpu_dcache_wb_all() aarch64_dcache_wb_all() 99 #define cpu_idcache_wbinv_all() \ 100 (aarch64_dcache_wbinv_all(), aarch64_icache_inv_all()) 101 #define cpu_icache_sync_all() \ 102 (aarch64_dcache_wb_all(), aarch64_icache_inv_all()) 103 #define cpu_icache_inv_all() aarch64_icache_inv_all() 104 105 #define cpu_dcache_wbinv_range(v,s) aarch64_dcache_wbinv_range((v),(s)) 106 #define cpu_dcache_inv_range(v,s) aarch64_dcache_inv_range((v),(s)) 107 #define cpu_dcache_wb_range(v,s) aarch64_dcache_wb_range((v),(s)) 108 #define cpu_idcache_wbinv_range(v,s) aarch64_idcache_wbinv_range((v),(s)) 109 #define cpu_icache_sync_range(v,s) \ 110 curcpu()->ci_cpufuncs.cf_icache_sync_range((v),(s)) 111 112 #define cpu_sdcache_wbinv_range(v,p,s) ((void)0) 113 #define cpu_sdcache_inv_range(v,p,s) ((void)0) 114 #define cpu_sdcache_wb_range(v,p,s) ((void)0) 115 116 /* others */ 117 #define cpu_drain_writebuf() aarch64_drain_writebuf() 118 119 extern u_int arm_dcache_align; 120 extern u_int arm_dcache_align_mask; 121 122 static inline bool 123 cpu_gtmr_exists_p(void) 124 { 125 126 return true; 127 } 128 129 static inline u_int 130 cpu_clusterid(void) 131 { 132 133 return __SHIFTOUT(reg_mpidr_el1_read(), MPIDR_AFF1); 134 } 135 136 static inline bool 137 cpu_earlydevice_va_p(void) 138 { 139 /* This function may be called before enabling MMU, or mapping KVA */ 140 if ((reg_sctlr_el1_read() & SCTLR_M) == 0) 141 return false; 142 143 /* device mapping will be available after pmap_devmap_bootstrap() */ 144 if (!pmap_devmap_bootstrapped_p()) 145 return false; 146 147 return true; 148 } 149 150 #endif /* _KERNEL */ 151 152 /* definitions of TAG and PAC in pointers */ 153 #define AARCH64_ADDRTOP_TAG_BIT 55 154 #define AARCH64_ADDRTOP_TAG __BIT(55) /* ECR_EL1.TBI[01]=1 */ 155 #define AARCH64_ADDRTOP_MSB __BIT(63) /* ECR_EL1.TBI[01]=0 */ 156 #define AARCH64_ADDRESS_TAG_MASK __BITS(63,56) /* if TCR.TBI[01]=1 */ 157 #define AARCH64_ADDRESS_PAC_MASK __BITS(54,48) /* depend on VIRT_BIT */ 158 #define AARCH64_ADDRESS_TAGPAC_MASK \ 159 (AARCH64_ADDRESS_TAG_MASK|AARCH64_ADDRESS_PAC_MASK) 160 161 #ifdef _KERNEL 162 /* 163 * Which is the address space of this VA? 164 * return the space considering TBI. (PAC is not yet) 165 * 166 * return value: AARCH64_ADDRSPACE_{LOWER,UPPER}{_OUTOFRANGE}? 167 */ 168 #define AARCH64_ADDRSPACE_LOWER 0 /* -> TTBR0 */ 169 #define AARCH64_ADDRSPACE_UPPER 1 /* -> TTBR1 */ 170 #define AARCH64_ADDRSPACE_LOWER_OUTOFRANGE -1 /* certainly fault */ 171 #define AARCH64_ADDRSPACE_UPPER_OUTOFRANGE -2 /* certainly fault */ 172 static inline int 173 aarch64_addressspace(vaddr_t va) 174 { 175 uint64_t addrtop, tbi; 176 177 addrtop = va & AARCH64_ADDRTOP_TAG; 178 tbi = addrtop ? TCR_TBI1 : TCR_TBI0; 179 if (reg_tcr_el1_read() & tbi) { 180 if (addrtop == 0) { 181 /* lower address, and TBI0 enabled */ 182 if ((va & AARCH64_ADDRESS_PAC_MASK) != 0) 183 return AARCH64_ADDRSPACE_LOWER_OUTOFRANGE; 184 return AARCH64_ADDRSPACE_LOWER; 185 } 186 /* upper address, and TBI1 enabled */ 187 if ((va & AARCH64_ADDRESS_PAC_MASK) != AARCH64_ADDRESS_PAC_MASK) 188 return AARCH64_ADDRSPACE_UPPER_OUTOFRANGE; 189 return AARCH64_ADDRSPACE_UPPER; 190 } 191 192 addrtop = va & AARCH64_ADDRTOP_MSB; 193 if (addrtop == 0) { 194 /* lower address, and TBI0 disabled */ 195 if ((va & AARCH64_ADDRESS_TAGPAC_MASK) != 0) 196 return AARCH64_ADDRSPACE_LOWER_OUTOFRANGE; 197 return AARCH64_ADDRSPACE_LOWER; 198 } 199 /* upper address, and TBI1 disabled */ 200 if ((va & AARCH64_ADDRESS_TAGPAC_MASK) != AARCH64_ADDRESS_TAGPAC_MASK) 201 return AARCH64_ADDRSPACE_UPPER_OUTOFRANGE; 202 return AARCH64_ADDRSPACE_UPPER; 203 } 204 205 static inline vaddr_t 206 aarch64_untag_address(vaddr_t va) 207 { 208 uint64_t addrtop, tbi; 209 210 addrtop = va & AARCH64_ADDRTOP_TAG; 211 tbi = addrtop ? TCR_TBI1 : TCR_TBI0; 212 if (reg_tcr_el1_read() & tbi) { 213 if (addrtop == 0) { 214 /* lower address, and TBI0 enabled */ 215 return va & ~AARCH64_ADDRESS_TAG_MASK; 216 } 217 /* upper address, and TBI1 enabled */ 218 return va | AARCH64_ADDRESS_TAG_MASK; 219 } 220 221 /* TBI[01] is disabled, nothing to do */ 222 return va; 223 } 224 225 #endif /* _KERNEL */ 226 227 static __inline uint64_t 228 aarch64_strip_pac(uint64_t __val) 229 { 230 if (__val & AARCH64_ADDRTOP_TAG) 231 return __val | AARCH64_ADDRESS_TAGPAC_MASK; 232 return __val & ~AARCH64_ADDRESS_TAGPAC_MASK; 233 } 234 235 #endif /* _AARCH64_CPUFUNC_H_ */ 236