Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file contains the light-weight system call handlers (fsyscall-handlers). |
| 3 | * |
| 4 | * Copyright (C) 2003 Hewlett-Packard Co |
| 5 | * David Mosberger-Tang <davidm@hpl.hp.com> |
| 6 | * |
| 7 | * 25-Sep-03 davidm Implement fsys_rt_sigprocmask(). |
| 8 | * 18-Feb-03 louisk Implement fsys_gettimeofday(). |
| 9 | * 28-Feb-03 davidm Fixed several bugs in fsys_gettimeofday(). Tuned it some more, |
| 10 | * probably broke it along the way... ;-) |
| 11 | * 13-Jul-04 clameter Implement fsys_clock_gettime and revise fsys_gettimeofday to make |
| 12 | * it capable of using memory based clocks without falling back to C code. |
Fenghua Yu | 3bc207d | 2007-02-12 16:27:10 -0800 | [diff] [blame] | 13 | * 08-Feb-07 Fenghua Yu Implement fsys_getcpu. |
| 14 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | */ |
| 16 | |
| 17 | #include <asm/asmmacro.h> |
| 18 | #include <asm/errno.h> |
Sam Ravnborg | 39e01cb | 2005-09-09 22:03:13 +0200 | [diff] [blame] | 19 | #include <asm/asm-offsets.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <asm/percpu.h> |
| 21 | #include <asm/thread_info.h> |
| 22 | #include <asm/sal.h> |
| 23 | #include <asm/signal.h> |
| 24 | #include <asm/system.h> |
| 25 | #include <asm/unistd.h> |
| 26 | |
| 27 | #include "entry.h" |
Isaku Yamahata | dd97d5c | 2009-03-04 21:05:34 +0900 | [diff] [blame] | 28 | #include "paravirt_inst.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | /* |
| 31 | * See Documentation/ia64/fsys.txt for details on fsyscalls. |
| 32 | * |
| 33 | * On entry to an fsyscall handler: |
| 34 | * r10 = 0 (i.e., defaults to "successful syscall return") |
| 35 | * r11 = saved ar.pfs (a user-level value) |
| 36 | * r15 = system call number |
| 37 | * r16 = "current" task pointer (in normal kernel-mode, this is in r13) |
| 38 | * r32-r39 = system call arguments |
| 39 | * b6 = return address (a user-level value) |
| 40 | * ar.pfs = previous frame-state (a user-level value) |
| 41 | * PSR.be = cleared to zero (i.e., little-endian byte order is in effect) |
| 42 | * all other registers may contain values passed in from user-mode |
| 43 | * |
| 44 | * On return from an fsyscall handler: |
| 45 | * r11 = saved ar.pfs (as passed into the fsyscall handler) |
| 46 | * r15 = system call number (as passed into the fsyscall handler) |
| 47 | * r32-r39 = system call arguments (as passed into the fsyscall handler) |
| 48 | * b6 = return address (as passed into the fsyscall handler) |
| 49 | * ar.pfs = previous frame-state (as passed into the fsyscall handler) |
| 50 | */ |
| 51 | |
| 52 | ENTRY(fsys_ni_syscall) |
| 53 | .prologue |
| 54 | .altrp b6 |
| 55 | .body |
| 56 | mov r8=ENOSYS |
| 57 | mov r10=-1 |
| 58 | FSYS_RETURN |
| 59 | END(fsys_ni_syscall) |
| 60 | |
| 61 | ENTRY(fsys_getpid) |
| 62 | .prologue |
| 63 | .altrp b6 |
| 64 | .body |
Pavel Emelyanov | 96ded9d | 2008-03-28 14:27:00 -0700 | [diff] [blame] | 65 | add r17=IA64_TASK_GROUP_LEADER_OFFSET,r16 |
| 66 | ;; |
| 67 | ld8 r17=[r17] // r17 = current->group_leader |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 |
| 69 | ;; |
| 70 | ld4 r9=[r9] |
Pavel Emelyanov | 96ded9d | 2008-03-28 14:27:00 -0700 | [diff] [blame] | 71 | add r17=IA64_TASK_TGIDLINK_OFFSET,r17 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | ;; |
| 73 | and r9=TIF_ALLWORK_MASK,r9 |
Pavel Emelyanov | 96ded9d | 2008-03-28 14:27:00 -0700 | [diff] [blame] | 74 | ld8 r17=[r17] // r17 = current->group_leader->pids[PIDTYPE_PID].pid |
| 75 | ;; |
| 76 | add r8=IA64_PID_LEVEL_OFFSET,r17 |
| 77 | ;; |
| 78 | ld4 r8=[r8] // r8 = pid->level |
| 79 | add r17=IA64_PID_UPID_OFFSET,r17 // r17 = &pid->numbers[0] |
| 80 | ;; |
| 81 | shl r8=r8,IA64_UPID_SHIFT |
| 82 | ;; |
| 83 | add r17=r17,r8 // r17 = &pid->numbers[pid->level] |
| 84 | ;; |
| 85 | ld4 r8=[r17] // r8 = pid->numbers[pid->level].nr |
| 86 | ;; |
| 87 | mov r17=0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | ;; |
| 89 | cmp.ne p8,p0=0,r9 |
| 90 | (p8) br.spnt.many fsys_fallback_syscall |
| 91 | FSYS_RETURN |
| 92 | END(fsys_getpid) |
| 93 | |
| 94 | ENTRY(fsys_getppid) |
| 95 | .prologue |
| 96 | .altrp b6 |
| 97 | .body |
| 98 | add r17=IA64_TASK_GROUP_LEADER_OFFSET,r16 |
| 99 | ;; |
| 100 | ld8 r17=[r17] // r17 = current->group_leader |
| 101 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 |
| 102 | ;; |
| 103 | |
| 104 | ld4 r9=[r9] |
| 105 | add r17=IA64_TASK_REAL_PARENT_OFFSET,r17 // r17 = ¤t->group_leader->real_parent |
| 106 | ;; |
| 107 | and r9=TIF_ALLWORK_MASK,r9 |
| 108 | |
| 109 | 1: ld8 r18=[r17] // r18 = current->group_leader->real_parent |
| 110 | ;; |
| 111 | cmp.ne p8,p0=0,r9 |
| 112 | add r8=IA64_TASK_TGID_OFFSET,r18 // r8 = ¤t->group_leader->real_parent->tgid |
| 113 | ;; |
| 114 | |
| 115 | /* |
| 116 | * The .acq is needed to ensure that the read of tgid has returned its data before |
| 117 | * we re-check "real_parent". |
| 118 | */ |
| 119 | ld4.acq r8=[r8] // r8 = current->group_leader->real_parent->tgid |
| 120 | #ifdef CONFIG_SMP |
| 121 | /* |
| 122 | * Re-read current->group_leader->real_parent. |
| 123 | */ |
| 124 | ld8 r19=[r17] // r19 = current->group_leader->real_parent |
| 125 | (p8) br.spnt.many fsys_fallback_syscall |
| 126 | ;; |
| 127 | cmp.ne p6,p0=r18,r19 // did real_parent change? |
| 128 | mov r19=0 // i must not leak kernel bits... |
| 129 | (p6) br.cond.spnt.few 1b // yes -> redo the read of tgid and the check |
| 130 | ;; |
| 131 | mov r17=0 // i must not leak kernel bits... |
| 132 | mov r18=0 // i must not leak kernel bits... |
| 133 | #else |
| 134 | mov r17=0 // i must not leak kernel bits... |
| 135 | mov r18=0 // i must not leak kernel bits... |
| 136 | mov r19=0 // i must not leak kernel bits... |
| 137 | #endif |
| 138 | FSYS_RETURN |
| 139 | END(fsys_getppid) |
| 140 | |
| 141 | ENTRY(fsys_set_tid_address) |
| 142 | .prologue |
| 143 | .altrp b6 |
| 144 | .body |
| 145 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 |
Pavel Emelyanov | 96ded9d | 2008-03-28 14:27:00 -0700 | [diff] [blame] | 146 | add r17=IA64_TASK_TGIDLINK_OFFSET,r16 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | ;; |
| 148 | ld4 r9=[r9] |
| 149 | tnat.z p6,p7=r32 // check argument register for being NaT |
Pavel Emelyanov | 96ded9d | 2008-03-28 14:27:00 -0700 | [diff] [blame] | 150 | ld8 r17=[r17] // r17 = current->pids[PIDTYPE_PID].pid |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | ;; |
| 152 | and r9=TIF_ALLWORK_MASK,r9 |
Pavel Emelyanov | 96ded9d | 2008-03-28 14:27:00 -0700 | [diff] [blame] | 153 | add r8=IA64_PID_LEVEL_OFFSET,r17 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | add r18=IA64_TASK_CLEAR_CHILD_TID_OFFSET,r16 |
| 155 | ;; |
Pavel Emelyanov | 96ded9d | 2008-03-28 14:27:00 -0700 | [diff] [blame] | 156 | ld4 r8=[r8] // r8 = pid->level |
| 157 | add r17=IA64_PID_UPID_OFFSET,r17 // r17 = &pid->numbers[0] |
| 158 | ;; |
| 159 | shl r8=r8,IA64_UPID_SHIFT |
| 160 | ;; |
| 161 | add r17=r17,r8 // r17 = &pid->numbers[pid->level] |
| 162 | ;; |
| 163 | ld4 r8=[r17] // r8 = pid->numbers[pid->level].nr |
| 164 | ;; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | cmp.ne p8,p0=0,r9 |
| 166 | mov r17=-1 |
| 167 | ;; |
| 168 | (p6) st8 [r18]=r32 |
| 169 | (p7) st8 [r18]=r17 |
| 170 | (p8) br.spnt.many fsys_fallback_syscall |
| 171 | ;; |
| 172 | mov r17=0 // i must not leak kernel bits... |
| 173 | mov r18=0 // i must not leak kernel bits... |
| 174 | FSYS_RETURN |
| 175 | END(fsys_set_tid_address) |
| 176 | |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 177 | #if IA64_GTOD_LOCK_OFFSET !=0 |
| 178 | #error fsys_gettimeofday incompatible with changes to struct fsyscall_gtod_data_t |
| 179 | #endif |
| 180 | #if IA64_ITC_JITTER_OFFSET !=0 |
| 181 | #error fsys_gettimeofday incompatible with changes to struct itc_jitter_data_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | #endif |
| 183 | #define CLOCK_REALTIME 0 |
| 184 | #define CLOCK_MONOTONIC 1 |
| 185 | #define CLOCK_DIVIDE_BY_1000 0x4000 |
| 186 | #define CLOCK_ADD_MONOTONIC 0x8000 |
| 187 | |
| 188 | ENTRY(fsys_gettimeofday) |
| 189 | .prologue |
| 190 | .altrp b6 |
| 191 | .body |
| 192 | mov r31 = r32 |
| 193 | tnat.nz p6,p0 = r33 // guard against NaT argument |
| 194 | (p6) br.cond.spnt.few .fail_einval |
| 195 | mov r30 = CLOCK_DIVIDE_BY_1000 |
| 196 | ;; |
| 197 | .gettime: |
| 198 | // Register map |
| 199 | // Incoming r31 = pointer to address where to place result |
| 200 | // r30 = flags determining how time is processed |
| 201 | // r2,r3 = temp r4-r7 preserved |
| 202 | // r8 = result nanoseconds |
| 203 | // r9 = result seconds |
| 204 | // r10 = temporary storage for clock difference |
| 205 | // r11 = preserved: saved ar.pfs |
| 206 | // r12 = preserved: memory stack |
| 207 | // r13 = preserved: thread pointer |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 208 | // r14 = address of mask / mask value |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | // r15 = preserved: system call number |
| 210 | // r16 = preserved: current task pointer |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 211 | // r17 = (not used) |
| 212 | // r18 = (not used) |
| 213 | // r19 = address of itc_lastcycle |
| 214 | // r20 = struct fsyscall_gtod_data (= address of gtod_lock.sequence) |
| 215 | // r21 = address of mmio_ptr |
| 216 | // r22 = address of wall_time or monotonic_time |
| 217 | // r23 = address of shift / value |
| 218 | // r24 = address mult factor / cycle_last value |
| 219 | // r25 = itc_lastcycle value |
| 220 | // r26 = address clocksource cycle_last |
| 221 | // r27 = (not used) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | // r28 = sequence number at the beginning of critcal section |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 223 | // r29 = address of itc_jitter |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | // r30 = time processing flags / memory address |
| 225 | // r31 = pointer to result |
| 226 | // Predicates |
| 227 | // p6,p7 short term use |
| 228 | // p8 = timesource ar.itc |
| 229 | // p9 = timesource mmio64 |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 230 | // p10 = timesource mmio32 - not used |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | // p11 = timesource not to be handled by asm code |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 232 | // p12 = memory time source ( = p9 | p10) - not used |
| 233 | // p13 = do cmpxchg with itc_lastcycle |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | // p14 = Divide by 1000 |
| 235 | // p15 = Add monotonic |
| 236 | // |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 237 | // Note that instructions are optimized for McKinley. McKinley can |
| 238 | // process two bundles simultaneously and therefore we continuously |
| 239 | // try to feed the CPU two bundles and then a stop. |
Hidetoshi Seto | 4fe01c6 | 2008-01-29 14:39:33 +0900 | [diff] [blame] | 240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | add r2 = TI_FLAGS+IA64_TASK_SIZE,r16 |
Hidetoshi Seto | 4fe01c6 | 2008-01-29 14:39:33 +0900 | [diff] [blame] | 242 | tnat.nz p6,p0 = r31 // guard against Nat argument |
| 243 | (p6) br.cond.spnt.few .fail_einval |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 244 | movl r20 = fsyscall_gtod_data // load fsyscall gettimeofday data address |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | ;; |
Hidetoshi Seto | 4fe01c6 | 2008-01-29 14:39:33 +0900 | [diff] [blame] | 246 | ld4 r2 = [r2] // process work pending flags |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 247 | movl r29 = itc_jitter_data // itc_jitter |
| 248 | add r22 = IA64_GTOD_WALL_TIME_OFFSET,r20 // wall_time |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 249 | add r21 = IA64_CLKSRC_MMIO_OFFSET,r20 |
Hidetoshi Seto | 4fe01c6 | 2008-01-29 14:39:33 +0900 | [diff] [blame] | 250 | mov pr = r30,0xc000 // Set predicates according to function |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 251 | ;; |
Hidetoshi Seto | 4fe01c6 | 2008-01-29 14:39:33 +0900 | [diff] [blame] | 252 | and r2 = TIF_ALLWORK_MASK,r2 |
| 253 | add r19 = IA64_ITC_LASTCYCLE_OFFSET,r29 |
| 254 | (p15) add r22 = IA64_GTOD_MONO_TIME_OFFSET,r20 // monotonic_time |
| 255 | ;; |
| 256 | add r26 = IA64_CLKSRC_CYCLE_LAST_OFFSET,r20 // clksrc_cycle_last |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | cmp.ne p6, p0 = 0, r2 // Fallback if work is scheduled |
Hidetoshi Seto | 4fe01c6 | 2008-01-29 14:39:33 +0900 | [diff] [blame] | 258 | (p6) br.cond.spnt.many fsys_fallback_syscall |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | ;; |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 260 | // Begin critical section |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | .time_redo: |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 262 | ld4.acq r28 = [r20] // gtod_lock.sequence, Must take first |
Hidetoshi Seto | 829a999 | 2007-07-13 16:21:44 -0700 | [diff] [blame] | 263 | ;; |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 264 | and r28 = ~1,r28 // And make sequence even to force retry if odd |
Hidetoshi Seto | 829a999 | 2007-07-13 16:21:44 -0700 | [diff] [blame] | 265 | ;; |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 266 | ld8 r30 = [r21] // clocksource->mmio_ptr |
| 267 | add r24 = IA64_CLKSRC_MULT_OFFSET,r20 |
| 268 | ld4 r2 = [r29] // itc_jitter value |
| 269 | add r23 = IA64_CLKSRC_SHIFT_OFFSET,r20 |
| 270 | add r14 = IA64_CLKSRC_MASK_OFFSET,r20 |
| 271 | ;; |
| 272 | ld4 r3 = [r24] // clocksource mult value |
| 273 | ld8 r14 = [r14] // clocksource mask value |
| 274 | cmp.eq p8,p9 = 0,r30 // use cpu timer if no mmio_ptr |
| 275 | ;; |
| 276 | setf.sig f7 = r3 // Setup for mult scaling of counter |
| 277 | (p8) cmp.ne p13,p0 = r2,r0 // need itc_jitter compensation, set p13 |
| 278 | ld4 r23 = [r23] // clocksource shift value |
| 279 | ld8 r24 = [r26] // get clksrc_cycle_last value |
| 280 | (p9) cmp.eq p13,p0 = 0,r30 // if mmio_ptr, clear p13 jitter control |
| 281 | ;; |
| 282 | .pred.rel.mutex p8,p9 |
Isaku Yamahata | 94752a7 | 2009-03-04 21:05:38 +0900 | [diff] [blame] | 283 | MOV_FROM_ITC(p8, p6, r2, r10) // CPU_TIMER. 36 clocks latency!!! |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 284 | (p9) ld8 r2 = [r30] // MMIO_TIMER. Could also have latency issues.. |
| 285 | (p13) ld8 r25 = [r19] // get itc_lastcycle value |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 286 | ld8 r9 = [r22],IA64_TIMESPEC_TV_NSEC_OFFSET // tv_sec |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | ;; |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 288 | ld8 r8 = [r22],-IA64_TIMESPEC_TV_NSEC_OFFSET // tv_nsec |
| 289 | (p13) sub r3 = r25,r2 // Diff needed before comparison (thanks davidm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | ;; |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 291 | (p13) cmp.gt.unc p6,p7 = r3,r0 // check if it is less than last. p6,p7 cleared |
| 292 | sub r10 = r2,r24 // current_cycle - last_cycle |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | ;; |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 294 | (p6) sub r10 = r25,r24 // time we got was less than last_cycle |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | (p7) mov ar.ccv = r25 // more than last_cycle. Prep for cmpxchg |
| 296 | ;; |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 297 | (p7) cmpxchg8.rel r3 = [r19],r2,ar.ccv |
| 298 | ;; |
| 299 | (p7) cmp.ne p7,p0 = r25,r3 // if cmpxchg not successful |
| 300 | ;; |
| 301 | (p7) sub r10 = r3,r24 // then use new last_cycle instead |
| 302 | ;; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | and r10 = r10,r14 // Apply mask |
| 304 | ;; |
| 305 | setf.sig f8 = r10 |
| 306 | nop.i 123 |
| 307 | ;; |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 308 | // fault check takes 5 cycles and we have spare time |
| 309 | EX(.fail_efault, probe.w.fault r31, 3) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | xmpy.l f8 = f8,f7 // nsec_per_cyc*(counter-last_counter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | ;; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | getf.sig r2 = f8 |
| 313 | mf |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | ;; |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 315 | ld4 r10 = [r20] // gtod_lock.sequence |
| 316 | shr.u r2 = r2,r23 // shift by factor |
Hidetoshi Seto | 4fe01c6 | 2008-01-29 14:39:33 +0900 | [diff] [blame] | 317 | ;; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | add r8 = r8,r2 // Add xtime.nsecs |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 319 | cmp4.ne p7,p0 = r28,r10 |
| 320 | (p7) br.cond.dpnt.few .time_redo // sequence number changed, redo |
| 321 | // End critical section. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | // Now r8=tv->tv_nsec and r9=tv->tv_sec |
| 323 | mov r10 = r0 |
| 324 | movl r2 = 1000000000 |
| 325 | add r23 = IA64_TIMESPEC_TV_NSEC_OFFSET, r31 |
| 326 | (p14) movl r3 = 2361183241434822607 // Prep for / 1000 hack |
| 327 | ;; |
| 328 | .time_normalize: |
| 329 | mov r21 = r8 |
| 330 | cmp.ge p6,p0 = r8,r2 |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 331 | (p14) shr.u r20 = r8, 3 // We can repeat this if necessary just wasting time |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | ;; |
| 333 | (p14) setf.sig f8 = r20 |
| 334 | (p6) sub r8 = r8,r2 |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 335 | (p6) add r9 = 1,r9 // two nops before the branch. |
| 336 | (p14) setf.sig f7 = r3 // Chances for repeats are 1 in 10000 for gettod |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | (p6) br.cond.dpnt.few .time_normalize |
| 338 | ;; |
| 339 | // Divided by 8 though shift. Now divide by 125 |
| 340 | // The compiler was able to do that with a multiply |
| 341 | // and a shift and we do the same |
Tony Luck | 0aa366f | 2007-07-20 11:22:30 -0700 | [diff] [blame] | 342 | EX(.fail_efault, probe.w.fault r23, 3) // This also costs 5 cycles |
| 343 | (p14) xmpy.hu f8 = f8, f7 // xmpy has 5 cycles latency so use it |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | ;; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | (p14) getf.sig r2 = f8 |
| 346 | ;; |
Hidetoshi Seto | 4fe01c6 | 2008-01-29 14:39:33 +0900 | [diff] [blame] | 347 | mov r8 = r0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | (p14) shr.u r21 = r2, 4 |
| 349 | ;; |
| 350 | EX(.fail_efault, st8 [r31] = r9) |
| 351 | EX(.fail_efault, st8 [r23] = r21) |
| 352 | FSYS_RETURN |
| 353 | .fail_einval: |
| 354 | mov r8 = EINVAL |
| 355 | mov r10 = -1 |
| 356 | FSYS_RETURN |
| 357 | .fail_efault: |
| 358 | mov r8 = EFAULT |
| 359 | mov r10 = -1 |
| 360 | FSYS_RETURN |
| 361 | END(fsys_gettimeofday) |
| 362 | |
| 363 | ENTRY(fsys_clock_gettime) |
| 364 | .prologue |
| 365 | .altrp b6 |
| 366 | .body |
| 367 | cmp4.ltu p6, p0 = CLOCK_MONOTONIC, r32 |
| 368 | // Fallback if this is not CLOCK_REALTIME or CLOCK_MONOTONIC |
| 369 | (p6) br.spnt.few fsys_fallback_syscall |
| 370 | mov r31 = r33 |
| 371 | shl r30 = r32,15 |
| 372 | br.many .gettime |
| 373 | END(fsys_clock_gettime) |
| 374 | |
| 375 | /* |
| 376 | * long fsys_rt_sigprocmask (int how, sigset_t *set, sigset_t *oset, size_t sigsetsize). |
| 377 | */ |
| 378 | #if _NSIG_WORDS != 1 |
| 379 | # error Sorry, fsys_rt_sigprocmask() needs to be updated for _NSIG_WORDS != 1. |
| 380 | #endif |
| 381 | ENTRY(fsys_rt_sigprocmask) |
| 382 | .prologue |
| 383 | .altrp b6 |
| 384 | .body |
| 385 | |
| 386 | add r2=IA64_TASK_BLOCKED_OFFSET,r16 |
| 387 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 |
| 388 | cmp4.ltu p6,p0=SIG_SETMASK,r32 |
| 389 | |
| 390 | cmp.ne p15,p0=r0,r34 // oset != NULL? |
| 391 | tnat.nz p8,p0=r34 |
| 392 | add r31=IA64_TASK_SIGHAND_OFFSET,r16 |
| 393 | ;; |
| 394 | ld8 r3=[r2] // read/prefetch current->blocked |
| 395 | ld4 r9=[r9] |
| 396 | tnat.nz.or p6,p0=r35 |
| 397 | |
| 398 | cmp.ne.or p6,p0=_NSIG_WORDS*8,r35 |
| 399 | tnat.nz.or p6,p0=r32 |
| 400 | (p6) br.spnt.few .fail_einval // fail with EINVAL |
| 401 | ;; |
| 402 | #ifdef CONFIG_SMP |
| 403 | ld8 r31=[r31] // r31 <- current->sighand |
| 404 | #endif |
| 405 | and r9=TIF_ALLWORK_MASK,r9 |
| 406 | tnat.nz.or p8,p0=r33 |
| 407 | ;; |
| 408 | cmp.ne p7,p0=0,r9 |
| 409 | cmp.eq p6,p0=r0,r33 // set == NULL? |
| 410 | add r31=IA64_SIGHAND_SIGLOCK_OFFSET,r31 // r31 <- current->sighand->siglock |
| 411 | (p8) br.spnt.few .fail_efault // fail with EFAULT |
| 412 | (p7) br.spnt.many fsys_fallback_syscall // got pending kernel work... |
| 413 | (p6) br.dpnt.many .store_mask // -> short-circuit to just reading the signal mask |
| 414 | |
| 415 | /* Argh, we actually have to do some work and _update_ the signal mask: */ |
| 416 | |
| 417 | EX(.fail_efault, probe.r.fault r33, 3) // verify user has read-access to *set |
| 418 | EX(.fail_efault, ld8 r14=[r33]) // r14 <- *set |
| 419 | mov r17=(1 << (SIGKILL - 1)) | (1 << (SIGSTOP - 1)) |
| 420 | ;; |
| 421 | |
Isaku Yamahata | 84b8857 | 2009-03-04 21:05:36 +0900 | [diff] [blame] | 422 | RSM_PSR_I(p0, r18, r19) // mask interrupt delivery |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | mov ar.ccv=0 |
| 424 | andcm r14=r14,r17 // filter out SIGKILL & SIGSTOP |
| 425 | |
| 426 | #ifdef CONFIG_SMP |
| 427 | mov r17=1 |
| 428 | ;; |
| 429 | cmpxchg4.acq r18=[r31],r17,ar.ccv // try to acquire the lock |
| 430 | mov r8=EINVAL // default to EINVAL |
| 431 | ;; |
| 432 | ld8 r3=[r2] // re-read current->blocked now that we hold the lock |
| 433 | cmp4.ne p6,p0=r18,r0 |
| 434 | (p6) br.cond.spnt.many .lock_contention |
| 435 | ;; |
| 436 | #else |
| 437 | ld8 r3=[r2] // re-read current->blocked now that we hold the lock |
| 438 | mov r8=EINVAL // default to EINVAL |
| 439 | #endif |
| 440 | add r18=IA64_TASK_PENDING_OFFSET+IA64_SIGPENDING_SIGNAL_OFFSET,r16 |
| 441 | add r19=IA64_TASK_SIGNAL_OFFSET,r16 |
| 442 | cmp4.eq p6,p0=SIG_BLOCK,r32 |
| 443 | ;; |
| 444 | ld8 r19=[r19] // r19 <- current->signal |
| 445 | cmp4.eq p7,p0=SIG_UNBLOCK,r32 |
| 446 | cmp4.eq p8,p0=SIG_SETMASK,r32 |
| 447 | ;; |
| 448 | ld8 r18=[r18] // r18 <- current->pending.signal |
| 449 | .pred.rel.mutex p6,p7,p8 |
| 450 | (p6) or r14=r3,r14 // SIG_BLOCK |
| 451 | (p7) andcm r14=r3,r14 // SIG_UNBLOCK |
| 452 | |
| 453 | (p8) mov r14=r14 // SIG_SETMASK |
| 454 | (p6) mov r8=0 // clear error code |
| 455 | // recalc_sigpending() |
| 456 | add r17=IA64_SIGNAL_GROUP_STOP_COUNT_OFFSET,r19 |
| 457 | |
| 458 | add r19=IA64_SIGNAL_SHARED_PENDING_OFFSET+IA64_SIGPENDING_SIGNAL_OFFSET,r19 |
| 459 | ;; |
| 460 | ld4 r17=[r17] // r17 <- current->signal->group_stop_count |
| 461 | (p7) mov r8=0 // clear error code |
| 462 | |
| 463 | ld8 r19=[r19] // r19 <- current->signal->shared_pending |
| 464 | ;; |
| 465 | cmp4.gt p6,p7=r17,r0 // p6/p7 <- (current->signal->group_stop_count > 0)? |
| 466 | (p8) mov r8=0 // clear error code |
| 467 | |
| 468 | or r18=r18,r19 // r18 <- current->pending | current->signal->shared_pending |
| 469 | ;; |
| 470 | // r18 <- (current->pending | current->signal->shared_pending) & ~current->blocked: |
| 471 | andcm r18=r18,r14 |
| 472 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 |
| 473 | ;; |
| 474 | |
| 475 | (p7) cmp.ne.or.andcm p6,p7=r18,r0 // p6/p7 <- signal pending |
| 476 | mov r19=0 // i must not leak kernel bits... |
| 477 | (p6) br.cond.dpnt.many .sig_pending |
| 478 | ;; |
| 479 | |
| 480 | 1: ld4 r17=[r9] // r17 <- current->thread_info->flags |
| 481 | ;; |
| 482 | mov ar.ccv=r17 |
| 483 | and r18=~_TIF_SIGPENDING,r17 // r18 <- r17 & ~(1 << TIF_SIGPENDING) |
| 484 | ;; |
| 485 | |
| 486 | st8 [r2]=r14 // update current->blocked with new mask |
Christoph Lameter | a2a6476 | 2005-06-09 12:29:00 -0700 | [diff] [blame] | 487 | cmpxchg4.acq r8=[r9],r18,ar.ccv // current->thread_info->flags <- r18 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | ;; |
Christoph Lameter | a2a6476 | 2005-06-09 12:29:00 -0700 | [diff] [blame] | 489 | cmp.ne p6,p0=r17,r8 // update failed? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | (p6) br.cond.spnt.few 1b // yes -> retry |
| 491 | |
| 492 | #ifdef CONFIG_SMP |
| 493 | st4.rel [r31]=r0 // release the lock |
| 494 | #endif |
Isaku Yamahata | 84b8857 | 2009-03-04 21:05:36 +0900 | [diff] [blame] | 495 | SSM_PSR_I(p0, p9, r31) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | ;; |
| 497 | |
| 498 | srlz.d // ensure psr.i is set again |
| 499 | mov r18=0 // i must not leak kernel bits... |
| 500 | |
| 501 | .store_mask: |
| 502 | EX(.fail_efault, (p15) probe.w.fault r34, 3) // verify user has write-access to *oset |
| 503 | EX(.fail_efault, (p15) st8 [r34]=r3) |
| 504 | mov r2=0 // i must not leak kernel bits... |
| 505 | mov r3=0 // i must not leak kernel bits... |
| 506 | mov r8=0 // return 0 |
| 507 | mov r9=0 // i must not leak kernel bits... |
| 508 | mov r14=0 // i must not leak kernel bits... |
| 509 | mov r17=0 // i must not leak kernel bits... |
| 510 | mov r31=0 // i must not leak kernel bits... |
| 511 | FSYS_RETURN |
| 512 | |
| 513 | .sig_pending: |
| 514 | #ifdef CONFIG_SMP |
| 515 | st4.rel [r31]=r0 // release the lock |
| 516 | #endif |
Isaku Yamahata | 84b8857 | 2009-03-04 21:05:36 +0900 | [diff] [blame] | 517 | SSM_PSR_I(p0, p9, r17) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | ;; |
| 519 | srlz.d |
| 520 | br.sptk.many fsys_fallback_syscall // with signal pending, do the heavy-weight syscall |
| 521 | |
| 522 | #ifdef CONFIG_SMP |
| 523 | .lock_contention: |
| 524 | /* Rather than spinning here, fall back on doing a heavy-weight syscall. */ |
Isaku Yamahata | 84b8857 | 2009-03-04 21:05:36 +0900 | [diff] [blame] | 525 | SSM_PSR_I(p0, p9, r17) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | ;; |
| 527 | srlz.d |
| 528 | br.sptk.many fsys_fallback_syscall |
| 529 | #endif |
| 530 | END(fsys_rt_sigprocmask) |
| 531 | |
Fenghua Yu | 3bc207d | 2007-02-12 16:27:10 -0800 | [diff] [blame] | 532 | /* |
| 533 | * fsys_getcpu doesn't use the third parameter in this implementation. It reads |
| 534 | * current_thread_info()->cpu and corresponding node in cpu_to_node_map. |
| 535 | */ |
| 536 | ENTRY(fsys_getcpu) |
| 537 | .prologue |
| 538 | .altrp b6 |
| 539 | .body |
| 540 | ;; |
| 541 | add r2=TI_FLAGS+IA64_TASK_SIZE,r16 |
| 542 | tnat.nz p6,p0 = r32 // guard against NaT argument |
| 543 | add r3=TI_CPU+IA64_TASK_SIZE,r16 |
| 544 | ;; |
| 545 | ld4 r3=[r3] // M r3 = thread_info->cpu |
| 546 | ld4 r2=[r2] // M r2 = thread_info->flags |
| 547 | (p6) br.cond.spnt.few .fail_einval // B |
| 548 | ;; |
| 549 | tnat.nz p7,p0 = r33 // I guard against NaT argument |
| 550 | (p7) br.cond.spnt.few .fail_einval // B |
| 551 | #ifdef CONFIG_NUMA |
| 552 | movl r17=cpu_to_node_map |
| 553 | ;; |
| 554 | EX(.fail_efault, probe.w.fault r32, 3) // M This takes 5 cycles |
| 555 | EX(.fail_efault, probe.w.fault r33, 3) // M This takes 5 cycles |
| 556 | shladd r18=r3,1,r17 |
| 557 | ;; |
| 558 | ld2 r20=[r18] // r20 = cpu_to_node_map[cpu] |
| 559 | and r2 = TIF_ALLWORK_MASK,r2 |
| 560 | ;; |
| 561 | cmp.ne p8,p0=0,r2 |
| 562 | (p8) br.spnt.many fsys_fallback_syscall |
| 563 | ;; |
| 564 | ;; |
| 565 | EX(.fail_efault, st4 [r32] = r3) |
| 566 | EX(.fail_efault, st2 [r33] = r20) |
| 567 | mov r8=0 |
| 568 | ;; |
| 569 | #else |
| 570 | EX(.fail_efault, probe.w.fault r32, 3) // M This takes 5 cycles |
| 571 | EX(.fail_efault, probe.w.fault r33, 3) // M This takes 5 cycles |
| 572 | and r2 = TIF_ALLWORK_MASK,r2 |
| 573 | ;; |
| 574 | cmp.ne p8,p0=0,r2 |
| 575 | (p8) br.spnt.many fsys_fallback_syscall |
| 576 | ;; |
| 577 | EX(.fail_efault, st4 [r32] = r3) |
| 578 | EX(.fail_efault, st2 [r33] = r0) |
| 579 | mov r8=0 |
| 580 | ;; |
| 581 | #endif |
| 582 | FSYS_RETURN |
| 583 | END(fsys_getcpu) |
| 584 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | ENTRY(fsys_fallback_syscall) |
| 586 | .prologue |
| 587 | .altrp b6 |
| 588 | .body |
| 589 | /* |
| 590 | * We only get here from light-weight syscall handlers. Thus, we already |
| 591 | * know that r15 contains a valid syscall number. No need to re-check. |
| 592 | */ |
| 593 | adds r17=-1024,r15 |
| 594 | movl r14=sys_call_table |
| 595 | ;; |
Isaku Yamahata | 84b8857 | 2009-03-04 21:05:36 +0900 | [diff] [blame] | 596 | RSM_PSR_I(p0, r26, r27) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | shladd r18=r17,3,r14 |
| 598 | ;; |
| 599 | ld8 r18=[r18] // load normal (heavy-weight) syscall entry-point |
Isaku Yamahata | 84b8857 | 2009-03-04 21:05:36 +0900 | [diff] [blame] | 600 | MOV_FROM_PSR(p0, r29, r26) // read psr (12 cyc load latency) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | mov r27=ar.rsc |
| 602 | mov r21=ar.fpsr |
| 603 | mov r26=ar.pfs |
| 604 | END(fsys_fallback_syscall) |
| 605 | /* FALL THROUGH */ |
Isaku Yamahata | dd97d5c | 2009-03-04 21:05:34 +0900 | [diff] [blame] | 606 | GLOBAL_ENTRY(paravirt_fsys_bubble_down) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | .prologue |
| 608 | .altrp b6 |
| 609 | .body |
| 610 | /* |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 611 | * We get here for syscalls that don't have a lightweight |
| 612 | * handler. For those, we need to bubble down into the kernel |
| 613 | * and that requires setting up a minimal pt_regs structure, |
| 614 | * and initializing the CPU state more or less as if an |
| 615 | * interruption had occurred. To make syscall-restarts work, |
| 616 | * we setup pt_regs such that cr_iip points to the second |
| 617 | * instruction in syscall_via_break. Decrementing the IP |
| 618 | * hence will restart the syscall via break and not |
| 619 | * decrementing IP will return us to the caller, as usual. |
| 620 | * Note that we preserve the value of psr.pp rather than |
| 621 | * initializing it from dcr.pp. This makes it possible to |
| 622 | * distinguish fsyscall execution from other privileged |
| 623 | * execution. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | * |
| 625 | * On entry: |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 626 | * - normal fsyscall handler register usage, except |
| 627 | * that we also have: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | * - r18: address of syscall entry point |
| 629 | * - r21: ar.fpsr |
| 630 | * - r26: ar.pfs |
| 631 | * - r27: ar.rsc |
| 632 | * - r29: psr |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 633 | * |
| 634 | * We used to clear some PSR bits here but that requires slow |
| 635 | * serialization. Fortuntely, that isn't really necessary. |
| 636 | * The rationale is as follows: we used to clear bits |
| 637 | * ~PSR_PRESERVED_BITS in PSR.L. Since |
| 638 | * PSR_PRESERVED_BITS==PSR.{UP,MFL,MFH,PK,DT,PP,SP,RT,IC}, we |
| 639 | * ended up clearing PSR.{BE,AC,I,DFL,DFH,DI,DB,SI,TB}. |
| 640 | * However, |
| 641 | * |
| 642 | * PSR.BE : already is turned off in __kernel_syscall_via_epc() |
| 643 | * PSR.AC : don't care (kernel normally turns PSR.AC on) |
Isaku Yamahata | dd97d5c | 2009-03-04 21:05:34 +0900 | [diff] [blame] | 644 | * PSR.I : already turned off by the time paravirt_fsys_bubble_down gets |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 645 | * invoked |
| 646 | * PSR.DFL: always 0 (kernel never turns it on) |
| 647 | * PSR.DFH: don't care --- kernel never touches f32-f127 on its own |
| 648 | * initiative |
| 649 | * PSR.DI : always 0 (kernel never turns it on) |
| 650 | * PSR.SI : always 0 (kernel never turns it on) |
| 651 | * PSR.DB : don't care --- kernel never enables kernel-level |
| 652 | * breakpoints |
| 653 | * PSR.TB : must be 0 already; if it wasn't zero on entry to |
Isaku Yamahata | dd97d5c | 2009-03-04 21:05:34 +0900 | [diff] [blame] | 654 | * __kernel_syscall_via_epc, the branch to paravirt_fsys_bubble_down |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 655 | * will trigger a taken branch; the taken-trap-handler then |
| 656 | * converts the syscall into a break-based system-call. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | /* |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 659 | * Reading psr.l gives us only bits 0-31, psr.it, and psr.mc. |
| 660 | * The rest we have to synthesize. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | */ |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 662 | # define PSR_ONE_BITS ((3 << IA64_PSR_CPL0_BIT) \ |
| 663 | | (0x1 << IA64_PSR_RI_BIT) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | | IA64_PSR_BN | IA64_PSR_I) |
| 665 | |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 666 | invala // M0|1 |
| 667 | movl r14=ia64_ret_from_syscall // X |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
David Mosberger-Tang | 1ba7be7 | 2005-04-27 21:20:51 -0700 | [diff] [blame] | 669 | nop.m 0 |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 670 | movl r28=__kernel_syscall_via_break // X create cr.iip |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | ;; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 673 | mov r2=r16 // A get task addr to addl-addressable register |
| 674 | adds r16=IA64_TASK_THREAD_ON_USTACK_OFFSET,r16 // A |
| 675 | mov r31=pr // I0 save pr (2 cyc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | ;; |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 677 | st1 [r16]=r0 // M2|3 clear current->thread.on_ustack flag |
| 678 | addl r22=IA64_RBS_OFFSET,r2 // A compute base of RBS |
| 679 | add r3=TI_FLAGS+IA64_TASK_SIZE,r2 // A |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | ;; |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 681 | ld4 r3=[r3] // M0|1 r3 = current_thread_info()->flags |
| 682 | lfetch.fault.excl.nt1 [r22] // M0|1 prefetch register backing-store |
David Mosberger-Tang | 1ba7be7 | 2005-04-27 21:20:51 -0700 | [diff] [blame] | 683 | nop.i 0 |
| 684 | ;; |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 685 | mov ar.rsc=0 // M2 set enforced lazy mode, pl 0, LE, loadrs=0 |
Hidetoshi Seto | b64f34c | 2008-01-29 14:27:30 +0900 | [diff] [blame] | 686 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
Isaku Yamahata | 94752a7 | 2009-03-04 21:05:38 +0900 | [diff] [blame] | 687 | MOV_FROM_ITC(p0, p6, r30, r23) // M get cycle for accounting |
Hidetoshi Seto | b64f34c | 2008-01-29 14:27:30 +0900 | [diff] [blame] | 688 | #else |
David Mosberger-Tang | 1ba7be7 | 2005-04-27 21:20:51 -0700 | [diff] [blame] | 689 | nop.m 0 |
Hidetoshi Seto | b64f34c | 2008-01-29 14:27:30 +0900 | [diff] [blame] | 690 | #endif |
David Mosberger-Tang | 1ba7be7 | 2005-04-27 21:20:51 -0700 | [diff] [blame] | 691 | nop.i 0 |
| 692 | ;; |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 693 | mov r23=ar.bspstore // M2 (12 cyc) save ar.bspstore |
| 694 | mov.m r24=ar.rnat // M2 (5 cyc) read ar.rnat (dual-issues!) |
David Mosberger-Tang | 1ba7be7 | 2005-04-27 21:20:51 -0700 | [diff] [blame] | 695 | nop.i 0 |
| 696 | ;; |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 697 | mov ar.bspstore=r22 // M2 (6 cyc) switch to kernel RBS |
David Mosberger-Tang | 1ba7be7 | 2005-04-27 21:20:51 -0700 | [diff] [blame] | 698 | movl r8=PSR_ONE_BITS // X |
| 699 | ;; |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 700 | mov r25=ar.unat // M2 (5 cyc) save ar.unat |
| 701 | mov r19=b6 // I0 save b6 (2 cyc) |
| 702 | mov r20=r1 // A save caller's gp in r20 |
David Mosberger-Tang | 1ba7be7 | 2005-04-27 21:20:51 -0700 | [diff] [blame] | 703 | ;; |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 704 | or r29=r8,r29 // A construct cr.ipsr value to save |
| 705 | mov b6=r18 // I0 copy syscall entry-point to b6 (7 cyc) |
| 706 | addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r2 // A compute base of memory stack |
David Mosberger-Tang | 1ba7be7 | 2005-04-27 21:20:51 -0700 | [diff] [blame] | 707 | |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 708 | mov r18=ar.bsp // M2 save (kernel) ar.bsp (12 cyc) |
| 709 | cmp.ne pKStk,pUStk=r0,r0 // A set pKStk <- 0, pUStk <- 1 |
| 710 | br.call.sptk.many b7=ia64_syscall_setup // B |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | ;; |
Hidetoshi Seto | b64f34c | 2008-01-29 14:27:30 +0900 | [diff] [blame] | 712 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
| 713 | // mov.m r30=ar.itc is called in advance |
| 714 | add r16=TI_AC_STAMP+IA64_TASK_SIZE,r2 |
| 715 | add r17=TI_AC_LEAVE+IA64_TASK_SIZE,r2 |
| 716 | ;; |
| 717 | ld8 r18=[r16],TI_AC_STIME-TI_AC_STAMP // time at last check in kernel |
| 718 | ld8 r19=[r17],TI_AC_UTIME-TI_AC_LEAVE // time at leave kernel |
| 719 | ;; |
| 720 | ld8 r20=[r16],TI_AC_STAMP-TI_AC_STIME // cumulated stime |
| 721 | ld8 r21=[r17] // cumulated utime |
| 722 | sub r22=r19,r18 // stime before leave kernel |
| 723 | ;; |
| 724 | st8 [r16]=r30,TI_AC_STIME-TI_AC_STAMP // update stamp |
| 725 | sub r18=r30,r19 // elapsed time in user mode |
| 726 | ;; |
| 727 | add r20=r20,r22 // sum stime |
| 728 | add r21=r21,r18 // sum utime |
| 729 | ;; |
| 730 | st8 [r16]=r20 // update stime |
| 731 | st8 [r17]=r21 // update utime |
| 732 | ;; |
| 733 | #endif |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 734 | mov ar.rsc=0x3 // M2 set eager mode, pl 0, LE, loadrs=0 |
| 735 | mov rp=r14 // I0 set the real return addr |
David Mosberger-Tang | ebcc80c | 2005-05-05 06:40:00 -0700 | [diff] [blame] | 736 | and r3=_TIF_SYSCALL_TRACEAUDIT,r3 // A |
David Mosberger-Tang | 1ba7be7 | 2005-04-27 21:20:51 -0700 | [diff] [blame] | 737 | ;; |
Isaku Yamahata | 84b8857 | 2009-03-04 21:05:36 +0900 | [diff] [blame] | 738 | SSM_PSR_I(p0, p6, r22) // M2 we're on kernel stacks now, reenable irqs |
David Mosberger-Tang | ebcc80c | 2005-05-05 06:40:00 -0700 | [diff] [blame] | 739 | cmp.eq p8,p0=r3,r0 // A |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 740 | (p10) br.cond.spnt.many ia64_ret_from_syscall // B return if bad call-frame or r15 is a NaT |
David Mosberger-Tang | 1ba7be7 | 2005-04-27 21:20:51 -0700 | [diff] [blame] | 741 | |
| 742 | nop.m 0 |
David Mosberger-Tang | fbf7192 | 2005-04-27 21:21:26 -0700 | [diff] [blame] | 743 | (p8) br.call.sptk.many b6=b6 // B (ignore return address) |
| 744 | br.cond.spnt ia64_trace_syscall // B |
Isaku Yamahata | dd97d5c | 2009-03-04 21:05:34 +0900 | [diff] [blame] | 745 | END(paravirt_fsys_bubble_down) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | |
| 747 | .rodata |
| 748 | .align 8 |
Isaku Yamahata | dd97d5c | 2009-03-04 21:05:34 +0900 | [diff] [blame] | 749 | .globl paravirt_fsyscall_table |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | |
Isaku Yamahata | dd97d5c | 2009-03-04 21:05:34 +0900 | [diff] [blame] | 751 | data8 paravirt_fsys_bubble_down |
| 752 | paravirt_fsyscall_table: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | data8 fsys_ni_syscall |
| 754 | data8 0 // exit // 1025 |
| 755 | data8 0 // read |
| 756 | data8 0 // write |
| 757 | data8 0 // open |
| 758 | data8 0 // close |
| 759 | data8 0 // creat // 1030 |
| 760 | data8 0 // link |
| 761 | data8 0 // unlink |
| 762 | data8 0 // execve |
| 763 | data8 0 // chdir |
| 764 | data8 0 // fchdir // 1035 |
| 765 | data8 0 // utimes |
| 766 | data8 0 // mknod |
| 767 | data8 0 // chmod |
| 768 | data8 0 // chown |
| 769 | data8 0 // lseek // 1040 |
| 770 | data8 fsys_getpid // getpid |
| 771 | data8 fsys_getppid // getppid |
| 772 | data8 0 // mount |
| 773 | data8 0 // umount |
| 774 | data8 0 // setuid // 1045 |
| 775 | data8 0 // getuid |
| 776 | data8 0 // geteuid |
| 777 | data8 0 // ptrace |
| 778 | data8 0 // access |
| 779 | data8 0 // sync // 1050 |
| 780 | data8 0 // fsync |
| 781 | data8 0 // fdatasync |
| 782 | data8 0 // kill |
| 783 | data8 0 // rename |
| 784 | data8 0 // mkdir // 1055 |
| 785 | data8 0 // rmdir |
| 786 | data8 0 // dup |
| 787 | data8 0 // pipe |
| 788 | data8 0 // times |
| 789 | data8 0 // brk // 1060 |
| 790 | data8 0 // setgid |
| 791 | data8 0 // getgid |
| 792 | data8 0 // getegid |
| 793 | data8 0 // acct |
| 794 | data8 0 // ioctl // 1065 |
| 795 | data8 0 // fcntl |
| 796 | data8 0 // umask |
| 797 | data8 0 // chroot |
| 798 | data8 0 // ustat |
| 799 | data8 0 // dup2 // 1070 |
| 800 | data8 0 // setreuid |
| 801 | data8 0 // setregid |
| 802 | data8 0 // getresuid |
| 803 | data8 0 // setresuid |
| 804 | data8 0 // getresgid // 1075 |
| 805 | data8 0 // setresgid |
| 806 | data8 0 // getgroups |
| 807 | data8 0 // setgroups |
| 808 | data8 0 // getpgid |
| 809 | data8 0 // setpgid // 1080 |
| 810 | data8 0 // setsid |
| 811 | data8 0 // getsid |
| 812 | data8 0 // sethostname |
| 813 | data8 0 // setrlimit |
| 814 | data8 0 // getrlimit // 1085 |
| 815 | data8 0 // getrusage |
| 816 | data8 fsys_gettimeofday // gettimeofday |
| 817 | data8 0 // settimeofday |
| 818 | data8 0 // select |
| 819 | data8 0 // poll // 1090 |
| 820 | data8 0 // symlink |
| 821 | data8 0 // readlink |
| 822 | data8 0 // uselib |
| 823 | data8 0 // swapon |
| 824 | data8 0 // swapoff // 1095 |
| 825 | data8 0 // reboot |
| 826 | data8 0 // truncate |
| 827 | data8 0 // ftruncate |
| 828 | data8 0 // fchmod |
| 829 | data8 0 // fchown // 1100 |
| 830 | data8 0 // getpriority |
| 831 | data8 0 // setpriority |
| 832 | data8 0 // statfs |
| 833 | data8 0 // fstatfs |
| 834 | data8 0 // gettid // 1105 |
| 835 | data8 0 // semget |
| 836 | data8 0 // semop |
| 837 | data8 0 // semctl |
| 838 | data8 0 // msgget |
| 839 | data8 0 // msgsnd // 1110 |
| 840 | data8 0 // msgrcv |
| 841 | data8 0 // msgctl |
| 842 | data8 0 // shmget |
| 843 | data8 0 // shmat |
| 844 | data8 0 // shmdt // 1115 |
| 845 | data8 0 // shmctl |
| 846 | data8 0 // syslog |
| 847 | data8 0 // setitimer |
| 848 | data8 0 // getitimer |
| 849 | data8 0 // 1120 |
| 850 | data8 0 |
| 851 | data8 0 |
| 852 | data8 0 // vhangup |
| 853 | data8 0 // lchown |
| 854 | data8 0 // remap_file_pages // 1125 |
| 855 | data8 0 // wait4 |
| 856 | data8 0 // sysinfo |
| 857 | data8 0 // clone |
| 858 | data8 0 // setdomainname |
| 859 | data8 0 // newuname // 1130 |
| 860 | data8 0 // adjtimex |
| 861 | data8 0 |
| 862 | data8 0 // init_module |
| 863 | data8 0 // delete_module |
| 864 | data8 0 // 1135 |
| 865 | data8 0 |
| 866 | data8 0 // quotactl |
| 867 | data8 0 // bdflush |
| 868 | data8 0 // sysfs |
| 869 | data8 0 // personality // 1140 |
| 870 | data8 0 // afs_syscall |
| 871 | data8 0 // setfsuid |
| 872 | data8 0 // setfsgid |
| 873 | data8 0 // getdents |
| 874 | data8 0 // flock // 1145 |
| 875 | data8 0 // readv |
| 876 | data8 0 // writev |
| 877 | data8 0 // pread64 |
| 878 | data8 0 // pwrite64 |
| 879 | data8 0 // sysctl // 1150 |
| 880 | data8 0 // mmap |
| 881 | data8 0 // munmap |
| 882 | data8 0 // mlock |
| 883 | data8 0 // mlockall |
| 884 | data8 0 // mprotect // 1155 |
| 885 | data8 0 // mremap |
| 886 | data8 0 // msync |
| 887 | data8 0 // munlock |
| 888 | data8 0 // munlockall |
| 889 | data8 0 // sched_getparam // 1160 |
| 890 | data8 0 // sched_setparam |
| 891 | data8 0 // sched_getscheduler |
| 892 | data8 0 // sched_setscheduler |
| 893 | data8 0 // sched_yield |
| 894 | data8 0 // sched_get_priority_max // 1165 |
| 895 | data8 0 // sched_get_priority_min |
| 896 | data8 0 // sched_rr_get_interval |
| 897 | data8 0 // nanosleep |
| 898 | data8 0 // nfsservctl |
| 899 | data8 0 // prctl // 1170 |
| 900 | data8 0 // getpagesize |
| 901 | data8 0 // mmap2 |
| 902 | data8 0 // pciconfig_read |
| 903 | data8 0 // pciconfig_write |
| 904 | data8 0 // perfmonctl // 1175 |
| 905 | data8 0 // sigaltstack |
| 906 | data8 0 // rt_sigaction |
| 907 | data8 0 // rt_sigpending |
| 908 | data8 fsys_rt_sigprocmask // rt_sigprocmask |
| 909 | data8 0 // rt_sigqueueinfo // 1180 |
| 910 | data8 0 // rt_sigreturn |
| 911 | data8 0 // rt_sigsuspend |
| 912 | data8 0 // rt_sigtimedwait |
| 913 | data8 0 // getcwd |
| 914 | data8 0 // capget // 1185 |
| 915 | data8 0 // capset |
| 916 | data8 0 // sendfile |
| 917 | data8 0 |
| 918 | data8 0 |
| 919 | data8 0 // socket // 1190 |
| 920 | data8 0 // bind |
| 921 | data8 0 // connect |
| 922 | data8 0 // listen |
| 923 | data8 0 // accept |
| 924 | data8 0 // getsockname // 1195 |
| 925 | data8 0 // getpeername |
| 926 | data8 0 // socketpair |
| 927 | data8 0 // send |
| 928 | data8 0 // sendto |
| 929 | data8 0 // recv // 1200 |
| 930 | data8 0 // recvfrom |
| 931 | data8 0 // shutdown |
| 932 | data8 0 // setsockopt |
| 933 | data8 0 // getsockopt |
| 934 | data8 0 // sendmsg // 1205 |
| 935 | data8 0 // recvmsg |
| 936 | data8 0 // pivot_root |
| 937 | data8 0 // mincore |
| 938 | data8 0 // madvise |
| 939 | data8 0 // newstat // 1210 |
| 940 | data8 0 // newlstat |
| 941 | data8 0 // newfstat |
| 942 | data8 0 // clone2 |
| 943 | data8 0 // getdents64 |
| 944 | data8 0 // getunwind // 1215 |
| 945 | data8 0 // readahead |
| 946 | data8 0 // setxattr |
| 947 | data8 0 // lsetxattr |
| 948 | data8 0 // fsetxattr |
| 949 | data8 0 // getxattr // 1220 |
| 950 | data8 0 // lgetxattr |
| 951 | data8 0 // fgetxattr |
| 952 | data8 0 // listxattr |
| 953 | data8 0 // llistxattr |
| 954 | data8 0 // flistxattr // 1225 |
| 955 | data8 0 // removexattr |
| 956 | data8 0 // lremovexattr |
| 957 | data8 0 // fremovexattr |
| 958 | data8 0 // tkill |
| 959 | data8 0 // futex // 1230 |
| 960 | data8 0 // sched_setaffinity |
| 961 | data8 0 // sched_getaffinity |
| 962 | data8 fsys_set_tid_address // set_tid_address |
| 963 | data8 0 // fadvise64_64 |
| 964 | data8 0 // tgkill // 1235 |
| 965 | data8 0 // exit_group |
| 966 | data8 0 // lookup_dcookie |
| 967 | data8 0 // io_setup |
| 968 | data8 0 // io_destroy |
| 969 | data8 0 // io_getevents // 1240 |
| 970 | data8 0 // io_submit |
| 971 | data8 0 // io_cancel |
| 972 | data8 0 // epoll_create |
| 973 | data8 0 // epoll_ctl |
| 974 | data8 0 // epoll_wait // 1245 |
| 975 | data8 0 // restart_syscall |
| 976 | data8 0 // semtimedop |
| 977 | data8 0 // timer_create |
| 978 | data8 0 // timer_settime |
| 979 | data8 0 // timer_gettime // 1250 |
| 980 | data8 0 // timer_getoverrun |
| 981 | data8 0 // timer_delete |
| 982 | data8 0 // clock_settime |
| 983 | data8 fsys_clock_gettime // clock_gettime |
Fenghua Yu | 3bc207d | 2007-02-12 16:27:10 -0800 | [diff] [blame] | 984 | data8 0 // clock_getres // 1255 |
| 985 | data8 0 // clock_nanosleep |
| 986 | data8 0 // fstatfs64 |
| 987 | data8 0 // statfs64 |
| 988 | data8 0 // mbind |
| 989 | data8 0 // get_mempolicy // 1260 |
| 990 | data8 0 // set_mempolicy |
| 991 | data8 0 // mq_open |
| 992 | data8 0 // mq_unlink |
| 993 | data8 0 // mq_timedsend |
| 994 | data8 0 // mq_timedreceive // 1265 |
| 995 | data8 0 // mq_notify |
| 996 | data8 0 // mq_getsetattr |
| 997 | data8 0 // kexec_load |
| 998 | data8 0 // vserver |
| 999 | data8 0 // waitid // 1270 |
| 1000 | data8 0 // add_key |
| 1001 | data8 0 // request_key |
| 1002 | data8 0 // keyctl |
| 1003 | data8 0 // ioprio_set |
| 1004 | data8 0 // ioprio_get // 1275 |
| 1005 | data8 0 // move_pages |
| 1006 | data8 0 // inotify_init |
| 1007 | data8 0 // inotify_add_watch |
| 1008 | data8 0 // inotify_rm_watch |
| 1009 | data8 0 // migrate_pages // 1280 |
| 1010 | data8 0 // openat |
| 1011 | data8 0 // mkdirat |
| 1012 | data8 0 // mknodat |
| 1013 | data8 0 // fchownat |
| 1014 | data8 0 // futimesat // 1285 |
| 1015 | data8 0 // newfstatat |
| 1016 | data8 0 // unlinkat |
| 1017 | data8 0 // renameat |
| 1018 | data8 0 // linkat |
| 1019 | data8 0 // symlinkat // 1290 |
| 1020 | data8 0 // readlinkat |
| 1021 | data8 0 // fchmodat |
| 1022 | data8 0 // faccessat |
| 1023 | data8 0 |
| 1024 | data8 0 // 1295 |
| 1025 | data8 0 // unshare |
| 1026 | data8 0 // splice |
| 1027 | data8 0 // set_robust_list |
| 1028 | data8 0 // get_robust_list |
| 1029 | data8 0 // sync_file_range // 1300 |
| 1030 | data8 0 // tee |
| 1031 | data8 0 // vmsplice |
| 1032 | data8 0 |
| 1033 | data8 fsys_getcpu // getcpu // 1304 |
Chen, Kenneth W | 9ed2ad8 | 2006-01-31 14:26:25 -0800 | [diff] [blame] | 1034 | |
Ken Chen | c8c1635 | 2006-02-28 08:53:32 -0800 | [diff] [blame] | 1035 | // fill in zeros for the remaining entries |
| 1036 | .zero: |
Isaku Yamahata | dd97d5c | 2009-03-04 21:05:34 +0900 | [diff] [blame] | 1037 | .space paravirt_fsyscall_table + 8*NR_syscalls - .zero, 0 |