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 unchanged lines hidden (view full) --- 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 88629 2001-12-29 07:07:35Z 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 60 /* XXX */ --- 42 unchanged lines hidden (view full) --- 77#define MMU_SFSR_FV_SHIFT (0) 78 79#define MMU_SFSR_ASI_SIZE (8) 80#define MMU_SFSR_FT_SIZE (6) 81#define MMU_SFSR_CT_SIZE (2) 82 83#define MMU_SFSR_W (1L << MMU_SFSR_W_SHIFT) 84 |
85/* 86 * Some tlb operations must be atomical, so no interrupt or trap can be allowed 87 * while they are in progress. Traps should not happen, but interrupts need to 88 * be explicitely disabled. critical_enter() cannot be used here, since it only 89 * disables soft interrupts. 90 * XXX: is something like this needed elsewhere, too? 91 */ 92#define TLB_ATOMIC_START(s) do { \ 93 (s) = rdpr(pstate); \ 94 wrpr(pstate, (s) & ~PSTATE_IE, 0); \ 95} while (0) 96#define TLB_ATOMIC_END(s) wrpr(pstate, (s), 0) 97 |
98static __inline void |
99tlb_dtlb_context_primary_demap(void) 100{ 101 stxa(TLB_DEMAP_PRIMARY | TLB_DEMAP_CONTEXT, ASI_DMMU_DEMAP, 0); 102 membar(Sync); 103} 104 105static __inline void |
106tlb_dtlb_page_demap(u_long ctx, vm_offset_t va) 107{ 108 if (ctx == TLB_CTX_KERNEL) { 109 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_NUCLEUS | TLB_DEMAP_PAGE, 110 ASI_DMMU_DEMAP, 0); 111 membar(Sync); 112 } else { 113 stxa(AA_DMMU_SCXR, ASI_DMMU, ctx); 114 membar(Sync); 115 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_SECONDARY | TLB_DEMAP_PAGE, 116 ASI_DMMU_DEMAP, 0); |
117 membar(Sync); |
118 stxa(AA_DMMU_SCXR, ASI_DMMU, 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 TLB_ATOMIC_START(pst); |
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 TLB_ATOMIC_END(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 TLB_ATOMIC_START(pst); |
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 TLB_ATOMIC_END(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(u_long ctx, vm_offset_t va) 157{ 158 if (ctx == TLB_CTX_KERNEL) { 159 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_NUCLEUS | TLB_DEMAP_PAGE, 160 ASI_IMMU_DEMAP, 0); 161 flush(KERNBASE); 162 } else { 163 stxa(AA_DMMU_SCXR, ASI_DMMU, ctx); 164 membar(Sync); 165 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_SECONDARY | TLB_DEMAP_PAGE, 166 ASI_IMMU_DEMAP, 0); |
167 membar(Sync); |
168 stxa(AA_DMMU_SCXR, ASI_DMMU, 0); 169 /* flush probably not needed. */ 170 membar(Sync); 171 } 172} 173 174static __inline void 175tlb_itlb_store(vm_offset_t va, u_long ctx, struct tte tte) 176{ |
177 u_long pst; 178 179 TLB_ATOMIC_START(pst); |
180 stxa(AA_IMMU_TAR, ASI_IMMU, TLB_TAR_VA(va) | TLB_TAR_CTX(ctx)); 181 stxa(0, ASI_ITLB_DATA_IN_REG, tte.tte_data); 182 if (ctx == TLB_CTX_KERNEL) 183 flush(va); 184 else { 185 /* 186 * flush probably not needed and impossible here, no access to 187 * user page. 188 */ 189 membar(Sync); 190 } |
191 TLB_ATOMIC_END(pst); |
192} 193 194static __inline void |
195tlb_context_primary_demap(u_int tlb) 196{ 197 if (tlb & TLB_DTLB) 198 tlb_dtlb_context_primary_demap(); 199 if (tlb & TLB_ITLB) 200 tlb_itlb_context_primary_demap(); 201} 202 203static __inline void |
204tlb_itlb_store_slot(vm_offset_t va, u_long ctx, struct tte tte, int slot) 205{ |
206 u_long pst; 207 208 TLB_ATOMIC_START(pst); |
209 stxa(AA_IMMU_TAR, ASI_IMMU, TLB_TAR_VA(va) | TLB_TAR_CTX(ctx)); 210 stxa(TLB_DAR_SLOT(slot), ASI_ITLB_DATA_ACCESS_REG, tte.tte_data); 211 flush(va); |
212 TLB_ATOMIC_END(pst); |
213} 214 215static __inline void 216tlb_page_demap(u_int tlb, u_int ctx, vm_offset_t va) 217{ 218 if (tlb & TLB_DTLB) 219 tlb_dtlb_page_demap(ctx, va); 220 if (tlb & TLB_ITLB) --- 22 unchanged lines hidden --- |