tlb.h revision 91782
1/*- 2 * Copyright (c) 2001 Jake Burkholder. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/sparc64/include/tlb.h 91782 2002-03-07 05:25:15Z jake $ 27 */ 28 29#ifndef _MACHINE_TLB_H_ 30#define _MACHINE_TLB_H_ 31 32#define TLB_SLOT_COUNT 64 33 34#define TLB_SLOT_TSB_KERNEL_MIN 62 /* XXX */ 35#define TLB_SLOT_KERNEL 63 36 37#define TLB_DAR_SLOT_SHIFT (3) 38#define TLB_DAR_SLOT(slot) ((slot) << TLB_DAR_SLOT_SHIFT) 39 40#define TAR_VPN_SHIFT (13) 41#define TAR_CTX_MASK ((1 << TAR_VPN_SHIFT) - 1) 42 43#define TLB_TAR_VA(va) ((va) & ~TAR_CTX_MASK) 44#define TLB_TAR_CTX(ctx) ((ctx) & TAR_CTX_MASK) 45 46#define TLB_DEMAP_ID_SHIFT (4) 47#define TLB_DEMAP_ID_PRIMARY (0) 48#define TLB_DEMAP_ID_SECONDARY (1) 49#define TLB_DEMAP_ID_NUCLEUS (2) 50 51#define TLB_DEMAP_TYPE_SHIFT (6) 52#define TLB_DEMAP_TYPE_PAGE (0) 53#define TLB_DEMAP_TYPE_CONTEXT (1) 54 55#define TLB_DEMAP_VA(va) ((va) & ~PAGE_MASK) 56#define TLB_DEMAP_ID(id) ((id) << TLB_DEMAP_ID_SHIFT) 57#define TLB_DEMAP_TYPE(type) ((type) << TLB_DEMAP_TYPE_SHIFT) 58 59#define TLB_DEMAP_PAGE (TLB_DEMAP_TYPE(TLB_DEMAP_TYPE_PAGE)) 60#define TLB_DEMAP_CONTEXT (TLB_DEMAP_TYPE(TLB_DEMAP_TYPE_CONTEXT)) 61 62#define TLB_DEMAP_PRIMARY (TLB_DEMAP_ID(TLB_DEMAP_ID_PRIMARY)) 63#define TLB_DEMAP_SECONDARY (TLB_DEMAP_ID(TLB_DEMAP_ID_SECONDARY)) 64#define TLB_DEMAP_NUCLEUS (TLB_DEMAP_ID(TLB_DEMAP_ID_NUCLEUS)) 65 66#define TLB_CTX_KERNEL (0) 67#define TLB_CTX_USER_MIN (1) 68#define TLB_CTX_USER_MAX (8192) 69 70#define TLB_DTLB (1 << 0) 71#define TLB_ITLB (1 << 1) 72 73#define MMU_SFSR_ASI_SHIFT (16) 74#define MMU_SFSR_FT_SHIFT (7) 75#define MMU_SFSR_E_SHIFT (6) 76#define MMU_SFSR_CT_SHIFT (4) 77#define MMU_SFSR_PR_SHIFT (3) 78#define MMU_SFSR_W_SHIFT (2) 79#define MMU_SFSR_OW_SHIFT (1) 80#define MMU_SFSR_FV_SHIFT (0) 81 82#define MMU_SFSR_ASI_SIZE (8) 83#define MMU_SFSR_FT_SIZE (6) 84#define MMU_SFSR_CT_SIZE (2) 85 86#define MMU_SFSR_W (1L << MMU_SFSR_W_SHIFT) 87 88extern int kernel_tlb_slots; 89extern struct tte *kernel_ttes; 90 91/* 92 * Some tlb operations must be atomical, so no interrupt or trap can be allowed 93 * while they are in progress. Traps should not happen, but interrupts need to 94 * be explicitely disabled. critical_enter() cannot be used here, since it only 95 * disables soft interrupts. 96 * XXX: is something like this needed elsewhere, too? 97 */ 98 99static __inline void 100tlb_dtlb_context_primary_demap(void) 101{ 102 stxa(TLB_DEMAP_PRIMARY | TLB_DEMAP_CONTEXT, ASI_DMMU_DEMAP, 0); 103 membar(Sync); 104} 105 106static __inline void 107tlb_dtlb_page_demap(struct pmap *pm, vm_offset_t va) 108{ 109 u_int ctx; 110 111 ctx = pm->pm_context[PCPU_GET(cpuid)]; 112 if (ctx == TLB_CTX_KERNEL) { 113 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_NUCLEUS | TLB_DEMAP_PAGE, 114 ASI_DMMU_DEMAP, 0); 115 membar(Sync); 116 } else if (ctx != -1) { 117 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE, 118 ASI_DMMU_DEMAP, 0); 119 membar(Sync); 120 } 121} 122 123static __inline void 124tlb_dtlb_store(vm_offset_t va, u_long ctx, struct tte tte) 125{ 126 u_long pst; 127 128 pst = intr_disable(); 129 stxa(AA_DMMU_TAR, ASI_DMMU, 130 TLB_TAR_VA(va) | TLB_TAR_CTX(ctx)); 131 stxa(0, ASI_DTLB_DATA_IN_REG, tte.tte_data); 132 membar(Sync); 133 intr_restore(pst); 134} 135 136static __inline void 137tlb_dtlb_store_slot(vm_offset_t va, u_long ctx, struct tte tte, int slot) 138{ 139 u_long pst; 140 141 pst = intr_disable(); 142 stxa(AA_DMMU_TAR, ASI_DMMU, TLB_TAR_VA(va) | TLB_TAR_CTX(ctx)); 143 stxa(TLB_DAR_SLOT(slot), ASI_DTLB_DATA_ACCESS_REG, tte.tte_data); 144 membar(Sync); 145 intr_restore(pst); 146} 147 148static __inline void 149tlb_itlb_context_primary_demap(void) 150{ 151 stxa(TLB_DEMAP_PRIMARY | TLB_DEMAP_CONTEXT, ASI_IMMU_DEMAP, 0); 152 membar(Sync); 153} 154 155static __inline void 156tlb_itlb_page_demap(struct pmap *pm, vm_offset_t va) 157{ 158 u_int ctx; 159 160 ctx = pm->pm_context[PCPU_GET(cpuid)]; 161 if (ctx == TLB_CTX_KERNEL) { 162 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_NUCLEUS | TLB_DEMAP_PAGE, 163 ASI_IMMU_DEMAP, 0); 164 flush(KERNBASE); 165 } else if (ctx != -1) { 166 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE, 167 ASI_IMMU_DEMAP, 0); 168 membar(Sync); 169 } 170} 171 172static __inline void 173tlb_itlb_store(vm_offset_t va, u_long ctx, struct tte tte) 174{ 175 u_long pst; 176 177 pst = intr_disable(); 178 stxa(AA_IMMU_TAR, ASI_IMMU, TLB_TAR_VA(va) | TLB_TAR_CTX(ctx)); 179 stxa(0, ASI_ITLB_DATA_IN_REG, tte.tte_data); 180 if (ctx == TLB_CTX_KERNEL) 181 flush(va); 182 else { 183 /* 184 * flush probably not needed and impossible here, no access to 185 * user page. 186 */ 187 membar(Sync); 188 } 189 intr_restore(pst); 190} 191 192static __inline void 193tlb_context_demap(struct pmap *pm) 194{ 195 u_int ctx; 196 197 ctx = pm->pm_context[PCPU_GET(cpuid)]; 198 if (ctx != -1) { 199 tlb_dtlb_context_primary_demap(); 200 tlb_itlb_context_primary_demap(); 201 } 202} 203 204static __inline void 205tlb_itlb_store_slot(vm_offset_t va, u_long ctx, struct tte tte, int slot) 206{ 207 u_long pst; 208 209 pst = intr_disable(); 210 stxa(AA_IMMU_TAR, ASI_IMMU, TLB_TAR_VA(va) | TLB_TAR_CTX(ctx)); 211 stxa(TLB_DAR_SLOT(slot), ASI_ITLB_DATA_ACCESS_REG, tte.tte_data); 212 flush(va); 213 intr_restore(pst); 214} 215 216static __inline void 217tlb_page_demap(u_int tlb, struct pmap *pm, vm_offset_t va) 218{ 219 if (tlb & TLB_DTLB) 220 tlb_dtlb_page_demap(pm, va); 221 if (tlb & TLB_ITLB) 222 tlb_itlb_page_demap(pm, va); 223} 224 225static __inline void 226tlb_range_demap(struct pmap *pm, vm_offset_t start, vm_offset_t end) 227{ 228 for (; start < end; start += PAGE_SIZE) 229 tlb_page_demap(TLB_DTLB | TLB_ITLB, pm, start); 230} 231 232static __inline void 233tlb_tte_demap(struct tte tte, struct pmap *pm) 234{ 235 tlb_page_demap(TD_GET_TLB(tte.tte_data), pm, TV_GET_VA(tte.tte_vpn)); 236} 237 238static __inline void 239tlb_store(u_int tlb, vm_offset_t va, u_long ctx, struct tte tte) 240{ 241 KASSERT(ctx != -1, ("tlb_store: invalid context")); 242 if (tlb & TLB_DTLB) 243 tlb_dtlb_store(va, ctx, tte); 244 if (tlb & TLB_ITLB) 245 tlb_itlb_store(va, ctx, tte); 246} 247 248static __inline void 249tlb_store_slot(u_int tlb, vm_offset_t va, u_long ctx, struct tte tte, int slot) 250{ 251 KASSERT(ctx != -1, ("tlb_store_slot: invalid context")); 252 if (tlb & TLB_DTLB) 253 tlb_dtlb_store_slot(va, ctx, tte, slot); 254 if (tlb & TLB_ITLB) 255 tlb_itlb_store_slot(va, ctx, tte, slot); 256} 257 258#endif /* !_MACHINE_TLB_H_ */ 259