1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_MACHTHREAD_H 27 #define _SYS_MACHTHREAD_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/asi.h> 32 #include <sys/sun4asi.h> 33 #include <sys/machasi.h> 34 #include <sys/bitmap.h> 35 #include <sys/opl_olympus_regs.h> 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 #ifdef _ASM 42 43 #define THREAD_REG %g7 /* pointer to current thread data */ 44 45 /* 46 * Get the processor implementation from the version register. 47 */ 48 #define GET_CPU_IMPL(out) \ 49 rdpr %ver, out; \ 50 srlx out, 32, out; \ 51 sll out, 16, out; \ 52 srl out, 16, out; 53 54 #ifdef _STARFIRE 55 /* 56 * CPU_INDEX(r, scr) 57 * Returns cpu id in r. 58 * On Starfire, this is read from the Port Controller's Port ID 59 * register in local space. 60 * 61 * Need to load the 64 bit address of the PC's PortID reg 62 * using only one register. Kludge the 41 bits address constant to 63 * be 32bits by shifting it 12 bits to the right first. 64 */ 65 #define LOCAL_PC_PORTID_ADDR_SRL12 0x1FFF4000 66 #define PC_PORT_ID 0xD0 67 68 #define CPU_INDEX(r, scr) \ 69 rdpr %pstate, scr; \ 70 andn scr, PSTATE_IE | PSTATE_AM, r; \ 71 wrpr r, 0, %pstate; \ 72 set LOCAL_PC_PORTID_ADDR_SRL12, r; \ 73 sllx r, 12, r; \ 74 or r, PC_PORT_ID, r; \ 75 lduwa [r]ASI_IO, r; \ 76 wrpr scr, 0, %pstate 77 78 #elif defined(_OPL) 79 /* 80 * For OPL platform, we get CPU_INDEX from ASI_EIDR. 81 */ 82 #define CPU_INDEX(r, scr) \ 83 ldxa [%g0]ASI_EIDR, r; \ 84 and r, 0xfff, r 85 86 87 #else /* _STARFIRE */ 88 89 /* 90 * UPA supports up to 32 devices while Safari supports up to 91 * 1024 devices (utilizing the SSM protocol). Based upon the 92 * value of NCPU, a 5- or 10-bit mask will be needed for 93 * extracting the cpu id. 94 */ 95 #if NCPU > 32 96 #define CPU_MASK 0x3ff 97 #else 98 #define CPU_MASK 0x1f 99 #endif /* NCPU > 32 */ 100 101 /* 102 * CPU_INDEX(r, scr) 103 * Returns cpu id in r. 104 * For UPA based systems, the cpu id corresponds to the mid field in 105 * the UPA config register. For Safari based machines, the cpu id 106 * corresponds to the aid field in the Safari config register. 107 * 108 * XXX - scr reg is not used here. 109 */ 110 #define CPU_INDEX(r, scr) \ 111 ldxa [%g0]ASI_UPA_CONFIG, r; \ 112 srlx r, 17, r; \ 113 and r, CPU_MASK, r 114 115 #endif /* _STARFIRE */ 116 117 /* 118 * Given a cpu id extract the appropriate word 119 * in the cpuset mask for this cpu id. 120 */ 121 #if CPUSET_SIZE > CLONGSIZE 122 #define CPU_INDEXTOSET(base, index, scr) \ 123 srl index, BT_ULSHIFT, scr; \ 124 and index, BT_ULMASK, index; \ 125 sll scr, CLONGSHIFT, scr; \ 126 add base, scr, base 127 #else 128 #define CPU_INDEXTOSET(base, index, scr) 129 #endif /* CPUSET_SIZE */ 130 131 132 /* 133 * Assembly macro to find address of the current CPU. 134 * Used when coming in from a user trap - cannot use THREAD_REG. 135 * Args are destination register and one scratch register. 136 */ 137 #define CPU_ADDR(reg, scr) \ 138 .global cpu; \ 139 CPU_INDEX(scr, reg); \ 140 sll scr, CPTRSHIFT, scr; \ 141 set cpu, reg; \ 142 ldn [reg + scr], reg 143 144 #define CINT64SHIFT 3 145 146 /* 147 * Assembly macro to find the physical address of the current CPU. 148 * All memory references using VA must be limited to nucleus 149 * memory to avoid any MMU side effect. 150 */ 151 #define CPU_PADDR(reg, scr) \ 152 .global cpu_pa; \ 153 CPU_INDEX(scr, reg); \ 154 sll scr, CINT64SHIFT, scr; \ 155 set cpu_pa, reg; \ 156 ldx [reg + scr], reg 157 158 #endif /* _ASM */ 159 160 /* 161 * If a high level trap handler decides to call sys_trap() to execute some 162 * base level code, context and other registers must be set to proper 163 * values to run kernel. This is true for most part of the kernel, except 164 * for user_rtt, a substantial part of which is executed with registers 165 * ready to run user code. The following macro may be used to detect this 166 * condition and handle it. Please note that, in general, we can't restart 167 * arbitrary piece of code running at tl > 0; user_rtt is a special case 168 * that can be handled. 169 * 170 * Entry condition: 171 * 172 * %tl = 2 173 * pstate.ag = 1 174 * 175 * Register usage: 176 * 177 * scr1, scr2 - destroyed 178 * normal %g5 and %g6 - destroyed 179 * 180 */ 181 /* BEGIN CSTYLED */ 182 #define RESET_USER_RTT_REGS(scr1, scr2, label) \ 183 /* \ 184 * do nothing if %tl != 2. this an attempt to stop this \ 185 * piece of code from executing more than once before going \ 186 * back to TL=0. more specifically, the changes we are doing \ 187 * to %wstate, %canrestore and %otherwin can't be done more \ 188 * than once before going to TL=0. note that it is okay to \ 189 * execute this more than once if we restart at user_rtt and \ 190 * come back from there. \ 191 */ \ 192 rdpr %tl, scr1; \ 193 cmp scr1, 2; \ 194 bne,a,pn %xcc, label; \ 195 nop; \ 196 /* \ 197 * read tstate[2].%tpc. do nothing if it is not \ 198 * between rtt_ctx_start and rtt_ctx_end. \ 199 */ \ 200 rdpr %tpc, scr1; \ 201 set rtt_ctx_end, scr2; \ 202 cmp scr1, scr2; \ 203 bgu,a,pt %xcc, label; \ 204 nop; \ 205 set rtt_ctx_start, scr2; \ 206 cmp scr1, scr2; \ 207 blu,a,pt %xcc, label; \ 208 nop; \ 209 /* \ 210 * pickup tstate[2].cwp \ 211 */ \ 212 rdpr %tstate, scr1; \ 213 and scr1, TSTATE_CWP, scr1; \ 214 /* \ 215 * set tstate[1].cwp to tstate[2].cwp. fudge \ 216 * tstate[1].tpc and tstate[1].tnpc to restart \ 217 * user_rtt. \ 218 */ \ 219 wrpr %g0, 1, %tl; \ 220 set TSTATE_KERN | TSTATE_IE, scr2; \ 221 or scr1, scr2, scr2; \ 222 wrpr %g0, scr2, %tstate; \ 223 set user_rtt, scr1; \ 224 wrpr %g0, scr1, %tpc; \ 225 add scr1, 4, scr1; \ 226 wrpr %g0, scr1, %tnpc; \ 227 /* \ 228 * restore %tl \ 229 */ \ 230 wrpr %g0, 2, %tl; \ 231 /* \ 232 * set %wstate \ 233 */ \ 234 rdpr %wstate, scr1; \ 235 sllx scr1, WSTATE_SHIFT, scr1; \ 236 wrpr scr1, WSTATE_K64, %wstate; \ 237 /* \ 238 * setup window registers \ 239 * %cleanwin <-- nwin - 1 \ 240 * %otherwin <-- %canrestore \ 241 * %canrestore <-- 0 \ 242 */ \ 243 sethi %hi(nwin_minus_one), scr1; \ 244 ld [scr1 + %lo(nwin_minus_one)], scr1; \ 245 wrpr %g0, scr1, %cleanwin; \ 246 rdpr %canrestore, scr1; \ 247 wrpr %g0, scr1, %otherwin; \ 248 wrpr %g0, 0, %canrestore; \ 249 /* \ 250 * set THREAD_REG, as we have restored user \ 251 * registers in user_rtt. we trash %g5 and %g6 \ 252 * in the process. \ 253 */ \ 254 rdpr %pstate, scr1; \ 255 wrpr scr1, PSTATE_AG, %pstate; \ 256 /* \ 257 * using normal globals now \ 258 */ \ 259 CPU_ADDR(%g5, %g6); \ 260 ldn [%g5 + CPU_THREAD], %g6; \ 261 mov %g6, THREAD_REG; \ 262 rdpr %pstate, %g5; \ 263 wrpr %g5, PSTATE_AG, %pstate; \ 264 /* \ 265 * back to alternate globals. \ 266 * set PCONTEXT to run kernel. \ 267 * no need to demap I/DTLB as we \ 268 * never went back to user mode. \ 269 */ \ 270 mov MMU_PCONTEXT, scr1; \ 271 sethi %hi(kcontextreg), scr2; \ 272 ldx [scr2 + %lo(kcontextreg)], scr2; \ 273 stxa scr2, [scr1]ASI_MMU_CTX; \ 274 sethi %hi(FLUSH_ADDR), scr1; \ 275 flush scr1; 276 277 /* END CSTYLED */ 278 279 #ifdef __cplusplus 280 } 281 #endif 282 283 #endif /* _SYS_MACHTHREAD_H */ 284