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   1 /* entry.S: FR-V entry
   2  *
   3  * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  *
  12  * Entry to the kernel is "interesting":
  13  *  (1) There are no stack pointers, not even for the kernel
  14  *  (2) General Registers should not be clobbered
  15  *  (3) There are no kernel-only data registers
  16  *  (4) Since all addressing modes are wrt to a General Register, no global
  17  *      variables can be reached
  18  *
  19  * We deal with this by declaring that we shall kill GR28 on entering the
  20  * kernel from userspace
  21  *
  22  * However, since break interrupts can interrupt the CPU even when PSR.ET==0,
  23  * they can't rely on GR28 to be anything useful, and so need to clobber a
  24  * separate register (GR31). Break interrupts are managed in break.S
  25  *
  26  * GR29 _is_ saved, and holds the current task pointer globally
  27  *
  28  */
  29
  30 #include <linux/sys.h>
  31 #include <linux/config.h>
  32 #include <linux/linkage.h>
  33 #include <asm/thread_info.h>
  34 #include <asm/setup.h>
  35 #include <asm/segment.h>
  36 #include <asm/ptrace.h>
  37 #include <asm/errno.h>
  38 #include <asm/cache.h>
  39 #include <asm/spr-regs.h>
  40
  41 #define nr_syscalls ((syscall_table_size)/4)
  42
  43         .text
  44         .balign         4
  45
  46 .macro LEDS val
  47 #       sethi.p         %hi(0xe1200004),gr30
  48 #       setlo           %lo(0xe1200004),gr30
  49 #       setlos          #~\val,gr31
  50 #       st              gr31,@(gr30,gr0)
  51 #       sethi.p         %hi(0xffc00100),gr30
  52 #       setlo           %lo(0xffc00100),gr30
  53 #       sth             gr0,@(gr30,gr0)
  54 #       membar
  55 .endm
  56
  57 .macro LEDS32
  58 #       not             gr31,gr31
  59 #       sethi.p         %hi(0xe1200004),gr30
  60 #       setlo           %lo(0xe1200004),gr30
  61 #       st.p            gr31,@(gr30,gr0)
  62 #       srli            gr31,#16,gr31
  63 #       sethi.p         %hi(0xffc00100),gr30
  64 #       setlo           %lo(0xffc00100),gr30
  65 #       sth             gr31,@(gr30,gr0)
  66 #       membar
  67 .endm
  68
  69 ###############################################################################
  70 #
  71 # entry point for External interrupts received whilst executing userspace code
  72 #
  73 ###############################################################################
  74         .globl          __entry_uspace_external_interrupt
  75         .type           __entry_uspace_external_interrupt,@function
  76 __entry_uspace_external_interrupt:
  77         LEDS            0x6200
  78         sethi.p         %hi(__kernel_frame0_ptr),gr28
  79         setlo           %lo(__kernel_frame0_ptr),gr28
  80         ldi             @(gr28,#0),gr28
  81
  82         # handle h/w single-step through exceptions
  83         sti             gr0,@(gr28,#REG__STATUS)
  84
  85         .globl          __entry_uspace_external_interrupt_reentry
  86 __entry_uspace_external_interrupt_reentry:
  87         LEDS            0x6201
  88
  89         setlos          #REG__END,gr30
  90         dcpl            gr28,gr30,#0
  91
  92         # finish building the exception frame
  93         sti             sp,  @(gr28,#REG_SP)
  94         stdi            gr2, @(gr28,#REG_GR(2))
  95         stdi            gr4, @(gr28,#REG_GR(4))
  96         stdi            gr6, @(gr28,#REG_GR(6))
  97         stdi            gr8, @(gr28,#REG_GR(8))
  98         stdi            gr10,@(gr28,#REG_GR(10))
  99         stdi            gr12,@(gr28,#REG_GR(12))
 100         stdi            gr14,@(gr28,#REG_GR(14))
 101         stdi            gr16,@(gr28,#REG_GR(16))
 102         stdi            gr18,@(gr28,#REG_GR(18))
 103         stdi            gr20,@(gr28,#REG_GR(20))
 104         stdi            gr22,@(gr28,#REG_GR(22))
 105         stdi            gr24,@(gr28,#REG_GR(24))
 106         stdi            gr26,@(gr28,#REG_GR(26))
 107         sti             gr0, @(gr28,#REG_GR(28))
 108         sti             gr29,@(gr28,#REG_GR(29))
 109         stdi.p          gr30,@(gr28,#REG_GR(30))
 110
 111         # set up the kernel stack pointer
 112         ori             gr28,0,sp
 113
 114         movsg           tbr ,gr20
 115         movsg           psr ,gr22
 116         movsg           pcsr,gr21
 117         movsg           isr ,gr23
 118         movsg           ccr ,gr24
 119         movsg           cccr,gr25
 120         movsg           lr  ,gr26
 121         movsg           lcr ,gr27
 122
 123         setlos.p        #-1,gr4
 124         andi            gr22,#PSR_PS,gr5                /* try to rebuild original PSR value */
 125         andi.p          gr22,#~(PSR_PS|PSR_S),gr6
 126         slli            gr5,#1,gr5
 127         or              gr6,gr5,gr5
 128         andi            gr5,#~PSR_ET,gr5
 129
 130         sti             gr20,@(gr28,#REG_TBR)
 131         sti             gr21,@(gr28,#REG_PC)
 132         sti             gr5 ,@(gr28,#REG_PSR)
 133         sti             gr23,@(gr28,#REG_ISR)
 134         stdi            gr24,@(gr28,#REG_CCR)
 135         stdi            gr26,@(gr28,#REG_LR)
 136         sti             gr4 ,@(gr28,#REG_SYSCALLNO)
 137
 138         movsg           iacc0h,gr4
 139         movsg           iacc0l,gr5
 140         stdi            gr4,@(gr28,#REG_IACC0)
 141
 142         movsg           gner0,gr4
 143         movsg           gner1,gr5
 144         stdi            gr4,@(gr28,#REG_GNER0)
 145
 146         # set up kernel global registers
 147         sethi.p         %hi(__kernel_current_task),gr5
 148         setlo           %lo(__kernel_current_task),gr5
 149         sethi.p         %hi(_gp),gr16
 150         setlo           %lo(_gp),gr16
 151         ldi             @(gr5,#0),gr29
 152         ldi.p           @(gr29,#4),gr15         ; __current_thread_info = current->thread_info
 153
 154         # make sure we (the kernel) get div-zero and misalignment exceptions
 155         setlos          #ISR_EDE|ISR_DTT_DIVBYZERO|ISR_EMAM_EXCEPTION,gr5
 156         movgs           gr5,isr
 157
 158         # switch to the kernel trap table
 159         sethi.p         %hi(__entry_kerneltrap_table),gr6
 160         setlo           %lo(__entry_kerneltrap_table),gr6
 161         movgs           gr6,tbr
 162
 163         # set the return address
 164         sethi.p         %hi(__entry_return_from_user_interrupt),gr4
 165         setlo           %lo(__entry_return_from_user_interrupt),gr4
 166         movgs           gr4,lr
 167
 168         # raise the minimum interrupt priority to 15 (NMI only) and enable exceptions
 169         movsg           psr,gr4
 170
 171         ori             gr4,#PSR_PIL_14,gr4
 172         movgs           gr4,psr
 173         ori             gr4,#PSR_PIL_14|PSR_ET,gr4
 174         movgs           gr4,psr
 175
 176         LEDS            0x6202
 177         bra             do_IRQ
 178
 179         .size           __entry_uspace_external_interrupt,.-__entry_uspace_external_interrupt
 180
 181 ###############################################################################
 182 #
 183 # entry point for External interrupts received whilst executing kernel code
 184 # - on arriving here, the following registers should already be set up:
 185 #       GR15    - current thread_info struct pointer
 186 #       GR16    - kernel GP-REL pointer
 187 #       GR29    - current task struct pointer
 188 #       TBR     - kernel trap vector table
 189 #       ISR     - kernel's preferred integer controls
 190 #
 191 ###############################################################################
 192         .globl          __entry_kernel_external_interrupt
 193         .type           __entry_kernel_external_interrupt,@function
 194 __entry_kernel_external_interrupt:
 195         LEDS            0x6210
 196
 197         sub             sp,gr15,gr31
 198         LEDS32
 199
 200         # set up the stack pointer
 201         or.p            sp,gr0,gr30
 202         subi            sp,#REG__END,sp
 203         sti             gr30,@(sp,#REG_SP)
 204
 205         # handle h/w single-step through exceptions
 206         sti             gr0,@(sp,#REG__STATUS)
 207
 208         .globl          __entry_kernel_external_interrupt_reentry
 209 __entry_kernel_external_interrupt_reentry:
 210         LEDS            0x6211
 211
 212         # set up the exception frame
 213         setlos          #REG__END,gr30
 214         dcpl            sp,gr30,#0
 215
 216         sti.p           gr28,@(sp,#REG_GR(28))
 217         ori             sp,0,gr28
 218
 219         # finish building the exception frame
 220         stdi            gr2,@(gr28,#REG_GR(2))
 221         stdi            gr4,@(gr28,#REG_GR(4))
 222         stdi            gr6,@(gr28,#REG_GR(6))
 223         stdi            gr8,@(gr28,#REG_GR(8))
 224         stdi            gr10,@(gr28,#REG_GR(10))
 225         stdi            gr12,@(gr28,#REG_GR(12))
 226         stdi            gr14,@(gr28,#REG_GR(14))
 227         stdi            gr16,@(gr28,#REG_GR(16))
 228         stdi            gr18,@(gr28,#REG_GR(18))
 229         stdi            gr20,@(gr28,#REG_GR(20))
 230         stdi            gr22,@(gr28,#REG_GR(22))
 231         stdi            gr24,@(gr28,#REG_GR(24))
 232         stdi            gr26,@(gr28,#REG_GR(26))
 233         sti             gr29,@(gr28,#REG_GR(29))
 234         stdi            gr30,@(gr28,#REG_GR(30))
 235
 236         movsg           tbr ,gr20
 237         movsg           psr ,gr22
 238         movsg           pcsr,gr21
 239         movsg           isr ,gr23
 240         movsg           ccr ,gr24
 241         movsg           cccr,gr25
 242         movsg           lr  ,gr26
 243         movsg           lcr ,gr27
 244
 245         setlos.p        #-1,gr4
 246         andi            gr22,#PSR_PS,gr5                /* try to rebuild original PSR value */
 247         andi.p          gr22,#~(PSR_PS|PSR_S),gr6
 248         slli            gr5,#1,gr5
 249         or              gr6,gr5,gr5
 250         andi.p          gr5,#~PSR_ET,gr5
 251
 252         # set CCCR.CC3 to Undefined to abort atomic-modify completion inside the kernel
 253         # - for an explanation of how it works, see: Documentation/fujitsu/frv/atomic-ops.txt
 254         andi            gr25,#~0xc0,gr25
 255
 256         sti             gr20,@(gr28,#REG_TBR)
 257         sti             gr21,@(gr28,#REG_PC)
 258         sti             gr5 ,@(gr28,#REG_PSR)
 259         sti             gr23,@(gr28,#REG_ISR)
 260         stdi            gr24,@(gr28,#REG_CCR)
 261         stdi            gr26,@(gr28,#REG_LR)
 262         sti             gr4 ,@(gr28,#REG_SYSCALLNO)
 263
 264         movsg           iacc0h,gr4
 265         movsg           iacc0l,gr5
 266         stdi            gr4,@(gr28,#REG_IACC0)
 267
 268         movsg           gner0,gr4
 269         movsg           gner1,gr5
 270         stdi            gr4,@(gr28,#REG_GNER0)
 271
 272         # set the return address
 273         sethi.p         %hi(__entry_return_from_kernel_interrupt),gr4
 274         setlo           %lo(__entry_return_from_kernel_interrupt),gr4
 275         movgs           gr4,lr
 276
 277         # clear power-saving mode flags
 278         movsg           hsr0,gr4
 279         andi            gr4,#~HSR0_PDM,gr4
 280         movgs           gr4,hsr0
 281
 282         # raise the minimum interrupt priority to 15 (NMI only) and enable exceptions
 283         movsg           psr,gr4
 284         ori             gr4,#PSR_PIL_14,gr4
 285         movgs           gr4,psr
 286         ori             gr4,#PSR_ET,gr4
 287         movgs           gr4,psr
 288
 289         LEDS            0x6212
 290         bra             do_IRQ
 291
 292         .size           __entry_kernel_external_interrupt,.-__entry_kernel_external_interrupt
 293
 294
 295 ###############################################################################
 296 #
 297 # entry point for Software and Progam interrupts generated whilst executing userspace code
 298 #
 299 ###############################################################################
 300         .globl          __entry_uspace_softprog_interrupt
 301         .type           __entry_uspace_softprog_interrupt,@function
 302         .globl          __entry_uspace_handle_mmu_fault
 303 __entry_uspace_softprog_interrupt:
 304         LEDS            0x6000
 305 #ifdef CONFIG_MMU
 306         movsg           ear0,gr28
 307 __entry_uspace_handle_mmu_fault:
 308         movgs           gr28,scr2
 309 #endif
 310         sethi.p         %hi(__kernel_frame0_ptr),gr28
 311         setlo           %lo(__kernel_frame0_ptr),gr28
 312         ldi             @(gr28,#0),gr28
 313
 314         # handle h/w single-step through exceptions
 315         sti             gr0,@(gr28,#REG__STATUS)
 316
 317         .globl          __entry_uspace_softprog_interrupt_reentry
 318 __entry_uspace_softprog_interrupt_reentry:
 319         LEDS            0x6001
 320
 321         setlos          #REG__END,gr30
 322         dcpl            gr28,gr30,#0
 323
 324         # set up the kernel stack pointer
 325         sti.p           sp,@(gr28,#REG_SP)
 326         ori             gr28,0,sp
 327         sti             gr0,@(gr28,#REG_GR(28))
 328
 329         stdi            gr20,@(gr28,#REG_GR(20))
 330         stdi            gr22,@(gr28,#REG_GR(22))
 331
 332         movsg           tbr,gr20
 333         movsg           pcsr,gr21
 334         movsg           psr,gr22
 335
 336         sethi.p         %hi(__entry_return_from_user_exception),gr23
 337         setlo           %lo(__entry_return_from_user_exception),gr23
 338         bra             __entry_common
 339
 340         .size           __entry_uspace_softprog_interrupt,.-__entry_uspace_softprog_interrupt
 341
 342         # single-stepping was disabled on entry to a TLB handler that then faulted
 343 #ifdef CONFIG_MMU
 344         .globl          __entry_uspace_handle_mmu_fault_sstep
 345 __entry_uspace_handle_mmu_fault_sstep:
 346         movgs           gr28,scr2
 347         sethi.p         %hi(__kernel_frame0_ptr),gr28
 348         setlo           %lo(__kernel_frame0_ptr),gr28
 349         ldi             @(gr28,#0),gr28
 350
 351         # flag single-step re-enablement
 352         sti             gr0,@(gr28,#REG__STATUS)
 353         bra             __entry_uspace_softprog_interrupt_reentry
 354 #endif
 355
 356
 357 ###############################################################################
 358 #
 359 # entry point for Software and Progam interrupts generated whilst executing kernel code
 360 #
 361 ###############################################################################
 362         .globl          __entry_kernel_softprog_interrupt
 363         .type           __entry_kernel_softprog_interrupt,@function
 364 __entry_kernel_softprog_interrupt:
 365         LEDS            0x6004
 366
 367 #ifdef CONFIG_MMU
 368         movsg           ear0,gr30
 369         movgs           gr30,scr2
 370 #endif
 371
 372         .globl          __entry_kernel_handle_mmu_fault
 373 __entry_kernel_handle_mmu_fault:
 374         # set up the stack pointer
 375         subi            sp,#REG__END,sp
 376         sti             sp,@(sp,#REG_SP)
 377         sti             sp,@(sp,#REG_SP-4)
 378         andi            sp,#~7,sp
 379
 380         # handle h/w single-step through exceptions
 381         sti             gr0,@(sp,#REG__STATUS)
 382
 383         .globl          __entry_kernel_softprog_interrupt_reentry
 384 __entry_kernel_softprog_interrupt_reentry:
 385         LEDS            0x6005
 386
 387         setlos          #REG__END,gr30
 388         dcpl            sp,gr30,#0
 389
 390         # set up the exception frame
 391         sti.p           gr28,@(sp,#REG_GR(28))
 392         ori             sp,0,gr28
 393
 394         stdi            gr20,@(gr28,#REG_GR(20))
 395         stdi            gr22,@(gr28,#REG_GR(22))
 396
 397         ldi             @(sp,#REG_SP),gr22              /* reconstruct the old SP */
 398         addi            gr22,#REG__END,gr22
 399         sti             gr22,@(sp,#REG_SP)
 400
 401         # set CCCR.CC3 to Undefined to abort atomic-modify completion inside the kernel
 402         # - for an explanation of how it works, see: Documentation/fujitsu/frv/atomic-ops.txt
 403         movsg           cccr,gr20
 404         andi            gr20,#~0xc0,gr20
 405         movgs           gr20,cccr
 406
 407         movsg           tbr,gr20
 408         movsg           pcsr,gr21
 409         movsg           psr,gr22
 410
 411         sethi.p         %hi(__entry_return_from_kernel_exception),gr23
 412         setlo           %lo(__entry_return_from_kernel_exception),gr23
 413         bra             __entry_common
 414
 415         .size           __entry_kernel_softprog_interrupt,.-__entry_kernel_softprog_interrupt
 416
 417         # single-stepping was disabled on entry to a TLB handler that then faulted
 418 #ifdef CONFIG_MMU
 419         .globl          __entry_kernel_handle_mmu_fault_sstep
 420 __entry_kernel_handle_mmu_fault_sstep:
 421         # set up the stack pointer
 422         subi            sp,#REG__END,sp
 423         sti             sp,@(sp,#REG_SP)
 424         sti             sp,@(sp,#REG_SP-4)
 425         andi            sp,#~7,sp
 426
 427         # flag single-step re-enablement
 428         sethi           #REG__STATUS_STEP,gr30
 429         sti             gr30,@(sp,#REG__STATUS)
 430         bra             __entry_kernel_softprog_interrupt_reentry
 431 #endif
 432
 433
 434 ###############################################################################
 435 #
 436 # the rest of the kernel entry point code
 437 # - on arriving here, the following registers should be set up:
 438 #       GR1     - kernel stack pointer
 439 #       GR7     - syscall number (trap 0 only)
 440 #       GR8-13  - syscall args (trap 0 only)
 441 #       GR20    - saved TBR
 442 #       GR21    - saved PC
 443 #       GR22    - saved PSR
 444 #       GR23    - return handler address
 445 #       GR28    - exception frame on stack
 446 #       SCR2    - saved EAR0 where applicable (clobbered by ICI & ICEF insns on FR451)
 447 #       PSR     - PSR.S 1, PSR.ET 0
 448 #
 449 ###############################################################################
 450         .globl          __entry_common
 451         .type           __entry_common,@function
 452 __entry_common:
 453         LEDS            0x6008
 454
 455         # finish building the exception frame
 456         stdi            gr2,@(gr28,#REG_GR(2))
 457         stdi            gr4,@(gr28,#REG_GR(4))
 458         stdi            gr6,@(gr28,#REG_GR(6))
 459         stdi            gr8,@(gr28,#REG_GR(8))
 460         stdi            gr10,@(gr28,#REG_GR(10))
 461         stdi            gr12,@(gr28,#REG_GR(12))
 462         stdi            gr14,@(gr28,#REG_GR(14))
 463         stdi            gr16,@(gr28,#REG_GR(16))
 464         stdi            gr18,@(gr28,#REG_GR(18))
 465         stdi            gr24,@(gr28,#REG_GR(24))
 466         stdi            gr26,@(gr28,#REG_GR(26))
 467         sti             gr29,@(gr28,#REG_GR(29))
 468         stdi            gr30,@(gr28,#REG_GR(30))
 469
 470         movsg           lcr ,gr27
 471         movsg           lr  ,gr26
 472         movgs           gr23,lr
 473         movsg           cccr,gr25
 474         movsg           ccr ,gr24
 475         movsg           isr ,gr23
 476
 477         setlos.p        #-1,gr4
 478         andi            gr22,#PSR_PS,gr5                /* try to rebuild original PSR value */
 479         andi.p          gr22,#~(PSR_PS|PSR_S),gr6
 480         slli            gr5,#1,gr5
 481         or              gr6,gr5,gr5
 482         andi            gr5,#~PSR_ET,gr5
 483
 484         sti             gr20,@(gr28,#REG_TBR)
 485         sti             gr21,@(gr28,#REG_PC)
 486         sti             gr5 ,@(gr28,#REG_PSR)
 487         sti             gr23,@(gr28,#REG_ISR)
 488         stdi            gr24,@(gr28,#REG_CCR)
 489         stdi            gr26,@(gr28,#REG_LR)
 490         sti             gr4 ,@(gr28,#REG_SYSCALLNO)
 491
 492         movsg           iacc0h,gr4
 493         movsg           iacc0l,gr5
 494         stdi            gr4,@(gr28,#REG_IACC0)
 495
 496         movsg           gner0,gr4
 497         movsg           gner1,gr5
 498         stdi            gr4,@(gr28,#REG_GNER0)
 499
 500         # set up kernel global registers
 501         sethi.p         %hi(__kernel_current_task),gr5
 502         setlo           %lo(__kernel_current_task),gr5
 503         sethi.p         %hi(_gp),gr16
 504         setlo           %lo(_gp),gr16
 505         ldi             @(gr5,#0),gr29
 506         ldi             @(gr29,#4),gr15         ; __current_thread_info = current->thread_info
 507
 508         # switch to the kernel trap table
 509         sethi.p         %hi(__entry_kerneltrap_table),gr6
 510         setlo           %lo(__entry_kerneltrap_table),gr6
 511         movgs           gr6,tbr
 512
 513         # make sure we (the kernel) get div-zero and misalignment exceptions
 514         setlos          #ISR_EDE|ISR_DTT_DIVBYZERO|ISR_EMAM_EXCEPTION,gr5
 515         movgs           gr5,isr
 516
 517         # clear power-saving mode flags
 518         movsg           hsr0,gr4
 519         andi            gr4,#~HSR0_PDM,gr4
 520         movgs           gr4,hsr0
 521
 522         # multiplex again using old TBR as a guide
 523         setlos.p        #TBR_TT,gr3
 524         sethi           %hi(__entry_vector_table),gr6
 525         and.p           gr20,gr3,gr5
 526         setlo           %lo(__entry_vector_table),gr6
 527         srli            gr5,#2,gr5
 528         ld              @(gr5,gr6),gr5
 529
 530         LEDS            0x6009
 531         jmpl            @(gr5,gr0)
 532
 533
 534         .size           __entry_common,.-__entry_common
 535
 536 ###############################################################################
 537 #
 538 # handle instruction MMU fault
 539 #
 540 ###############################################################################
 541 #ifdef CONFIG_MMU
 542         .globl          __entry_insn_mmu_fault
 543 __entry_insn_mmu_fault:
 544         LEDS            0x6010
 545         setlos          #0,gr8
 546         movsg           esr0,gr9
 547         movsg           scr2,gr10
 548
 549         # now that we've accessed the exception regs, we can enable exceptions
 550         movsg           psr,gr4
 551         ori             gr4,#PSR_ET,gr4
 552         movgs           gr4,psr
 553
 554         sethi.p         %hi(do_page_fault),gr5
 555         setlo           %lo(do_page_fault),gr5
 556         jmpl            @(gr5,gr0)      ; call do_page_fault(0,esr0,ear0)
 557 #endif
 558
 559
 560 ###############################################################################
 561 #
 562 # handle instruction access error
 563 #
 564 ###############################################################################
 565         .globl          __entry_insn_access_error
 566 __entry_insn_access_error:
 567         LEDS            0x6011
 568         sethi.p         %hi(insn_access_error),gr5
 569         setlo           %lo(insn_access_error),gr5
 570         movsg           esfr1,gr8
 571         movsg           epcr0,gr9
 572         movsg           esr0,gr10
 573
 574         # now that we've accessed the exception regs, we can enable exceptions
 575         movsg           psr,gr4
 576         ori             gr4,#PSR_ET,gr4
 577         movgs           gr4,psr
 578         jmpl            @(gr5,gr0)      ; call insn_access_error(esfr1,epcr0,esr0)
 579
 580 ###############################################################################
 581 #
 582 # handle various instructions of dubious legality
 583 #
 584 ###############################################################################
 585         .globl          __entry_unsupported_trap
 586         .globl          __entry_illegal_instruction
 587         .globl          __entry_privileged_instruction
 588         .globl          __entry_debug_exception
 589 __entry_unsupported_trap:
 590         subi            gr21,#4,gr21
 591         sti             gr21,@(gr28,#REG_PC)
 592 __entry_illegal_instruction:
 593 __entry_privileged_instruction:
 594 __entry_debug_exception:
 595         LEDS            0x6012
 596         sethi.p         %hi(illegal_instruction),gr5
 597         setlo           %lo(illegal_instruction),gr5
 598         movsg           esfr1,gr8
 599         movsg           epcr0,gr9
 600         movsg           esr0,gr10
 601
 602         # now that we've accessed the exception regs, we can enable exceptions
 603         movsg           psr,gr4
 604         ori             gr4,#PSR_ET,gr4
 605         movgs           gr4,psr
 606         jmpl            @(gr5,gr0)      ; call ill_insn(esfr1,epcr0,esr0)
 607
 608 ###############################################################################
 609 #
 610 # handle media exception
 611 #
 612 ###############################################################################
 613         .globl          __entry_media_exception
 614 __entry_media_exception:
 615         LEDS            0x6013
 616         sethi.p         %hi(media_exception),gr5
 617         setlo           %lo(media_exception),gr5
 618         movsg           msr0,gr8
 619         movsg           msr1,gr9
 620
 621         # now that we've accessed the exception regs, we can enable exceptions
 622         movsg           psr,gr4
 623         ori             gr4,#PSR_ET,gr4
 624         movgs           gr4,psr
 625         jmpl            @(gr5,gr0)      ; call media_excep(msr0,msr1)
 626
 627 ###############################################################################
 628 #
 629 # handle data MMU fault
 630 # handle data DAT fault (write-protect exception)
 631 #
 632 ###############################################################################
 633 #ifdef CONFIG_MMU
 634         .globl          __entry_data_mmu_fault
 635 __entry_data_mmu_fault:
 636         .globl          __entry_data_dat_fault
 637 __entry_data_dat_fault:
 638         LEDS            0x6014
 639         setlos          #1,gr8
 640         movsg           esr0,gr9
 641         movsg           scr2,gr10       ; saved EAR0
 642
 643         # now that we've accessed the exception regs, we can enable exceptions
 644         movsg           psr,gr4
 645         ori             gr4,#PSR_ET,gr4
 646         movgs           gr4,psr
 647
 648         sethi.p         %hi(do_page_fault),gr5
 649         setlo           %lo(do_page_fault),gr5
 650         jmpl            @(gr5,gr0)      ; call do_page_fault(1,esr0,ear0)
 651 #endif
 652
 653 ###############################################################################
 654 #
 655 # handle data and instruction access exceptions
 656 #
 657 ###############################################################################
 658         .globl          __entry_insn_access_exception
 659         .globl          __entry_data_access_exception
 660 __entry_insn_access_exception:
 661 __entry_data_access_exception:
 662         LEDS            0x6016
 663         sethi.p         %hi(memory_access_exception),gr5
 664         setlo           %lo(memory_access_exception),gr5
 665         movsg           esr0,gr8
 666         movsg           scr2,gr9        ; saved EAR0
 667         movsg           epcr0,gr10
 668
 669         # now that we've accessed the exception regs, we can enable exceptions
 670         movsg           psr,gr4
 671         ori             gr4,#PSR_ET,gr4
 672         movgs           gr4,psr
 673         jmpl            @(gr5,gr0)      ; call memory_access_error(esr0,ear0,epcr0)
 674
 675 ###############################################################################
 676 #
 677 # handle data access error
 678 #
 679 ###############################################################################
 680         .globl          __entry_data_access_error
 681 __entry_data_access_error:
 682         LEDS            0x6016
 683         sethi.p         %hi(data_access_error),gr5
 684         setlo           %lo(data_access_error),gr5
 685         movsg           esfr1,gr8
 686         movsg           esr15,gr9
 687         movsg           ear15,gr10
 688
 689         # now that we've accessed the exception regs, we can enable exceptions
 690         movsg           psr,gr4
 691         ori             gr4,#PSR_ET,gr4
 692         movgs           gr4,psr
 693         jmpl            @(gr5,gr0)      ; call data_access_error(esfr1,esr15,ear15)
 694
 695 ###############################################################################
 696 #
 697 # handle data store error
 698 #
 699 ###############################################################################
 700         .globl          __entry_data_store_error
 701 __entry_data_store_error:
 702         LEDS            0x6017
 703         sethi.p         %hi(data_store_error),gr5
 704         setlo           %lo(data_store_error),gr5
 705         movsg           esfr1,gr8
 706         movsg           esr14,gr9
 707
 708         # now that we've accessed the exception regs, we can enable exceptions
 709         movsg           psr,gr4
 710         ori             gr4,#PSR_ET,gr4
 711         movgs           gr4,psr
 712         jmpl            @(gr5,gr0)      ; call data_store_error(esfr1,esr14)
 713
 714 ###############################################################################
 715 #
 716 # handle division exception
 717 #
 718 ###############################################################################
 719         .globl          __entry_division_exception
 720 __entry_division_exception:
 721         LEDS            0x6018
 722         sethi.p         %hi(division_exception),gr5
 723         setlo           %lo(division_exception),gr5
 724         movsg           esfr1,gr8
 725         movsg           esr0,gr9
 726         movsg           isr,gr10
 727
 728         # now that we've accessed the exception regs, we can enable exceptions
 729         movsg           psr,gr4
 730         ori             gr4,#PSR_ET,gr4
 731         movgs           gr4,psr
 732         jmpl            @(gr5,gr0)      ; call div_excep(esfr1,esr0,isr)
 733
 734 ###############################################################################
 735 #
 736 # handle compound exception
 737 #
 738 ###############################################################################
 739         .globl          __entry_compound_exception
 740 __entry_compound_exception:
 741         LEDS            0x6019
 742         sethi.p         %hi(compound_exception),gr5
 743         setlo           %lo(compound_exception),gr5
 744         movsg           esfr1,gr8
 745         movsg           esr0,gr9
 746         movsg           esr14,gr10
 747         movsg           esr15,gr11
 748         movsg           msr0,gr12
 749         movsg           msr1,gr13
 750
 751         # now that we've accessed the exception regs, we can enable exceptions
 752         movsg           psr,gr4
 753         ori             gr4,#PSR_ET,gr4
 754         movgs           gr4,psr
 755         jmpl            @(gr5,gr0)      ; call comp_excep(esfr1,esr0,esr14,esr15,msr0,msr1)
 756
 757 ###############################################################################
 758 #
 759 # handle interrupts and NMIs
 760 #
 761 ###############################################################################
 762         .globl          __entry_do_IRQ
 763 __entry_do_IRQ:
 764         LEDS            0x6020
 765
 766         # we can enable exceptions
 767         movsg           psr,gr4
 768         ori             gr4,#PSR_ET,gr4
 769         movgs           gr4,psr
 770         bra             do_IRQ
 771
 772         .globl          __entry_do_NMI
 773 __entry_do_NMI:
 774         LEDS            0x6021
 775
 776         # we can enable exceptions
 777         movsg           psr,gr4
 778         ori             gr4,#PSR_ET,gr4
 779         movgs           gr4,psr
 780         bra             do_NMI
 781
 782 ###############################################################################
 783 #
 784 # the return path for a newly forked child process
 785 # - __switch_to() saved the old current pointer in GR8 for us
 786 #
 787 ###############################################################################
 788         .globl          ret_from_fork
 789 ret_from_fork:
 790         LEDS            0x6100
 791         call            schedule_tail
 792
 793         # fork & co. return 0 to child
 794         setlos.p        #0,gr8
 795         bra             __syscall_exit
 796
 797 ###################################################################################################
 798 #
 799 # Return to user mode is not as complex as all this looks,
 800 # but we want the default path for a system call return to
 801 # go as quickly as possible which is why some of this is
 802 # less clear than it otherwise should be.
 803 #
 804 ###################################################################################################
 805         .balign         L1_CACHE_BYTES
 806         .globl          system_call
 807 system_call:
 808         LEDS            0x6101
 809         movsg           psr,gr4                 ; enable exceptions
 810         ori             gr4,#PSR_ET,gr4
 811         movgs           gr4,psr
 812
 813         sti             gr7,@(gr28,#REG_SYSCALLNO)
 814         sti.p           gr8,@(gr28,#REG_ORIG_GR8)
 815
 816         subicc          gr7,#nr_syscalls,gr0,icc0
 817         bnc             icc0,#0,__syscall_badsys
 818
 819         ldi             @(gr15,#TI_FLAGS),gr4
 820         ori             gr4,#_TIF_SYSCALL_TRACE,gr4
 821         andicc          gr4,#_TIF_SYSCALL_TRACE,gr0,icc0
 822         bne             icc0,#0,__syscall_trace_entry
 823
 824 __syscall_call:
 825         slli.p          gr7,#2,gr7
 826         sethi           %hi(sys_call_table),gr5
 827         setlo           %lo(sys_call_table),gr5
 828         ld              @(gr5,gr7),gr4
 829         calll           @(gr4,gr0)
 830
 831
 832 ###############################################################################
 833 #
 834 # return to interrupted process
 835 #
 836 ###############################################################################
 837 __syscall_exit:
 838         LEDS            0x6300
 839
 840         sti             gr8,@(gr28,#REG_GR(8))  ; save return value
 841
 842         # rebuild saved psr - execve will change it for init/main.c
 843         ldi             @(gr28,#REG_PSR),gr22
 844         srli            gr22,#1,gr5
 845         andi.p          gr22,#~PSR_PS,gr22
 846         andi            gr5,#PSR_PS,gr5
 847         or              gr5,gr22,gr22
 848         ori             gr22,#PSR_S,gr22
 849
 850         # keep current PSR in GR23
 851         movsg           psr,gr23
 852
 853         # make sure we don't miss an interrupt setting need_resched or sigpending between
 854         # sampling and the RETT
 855         ori             gr23,#PSR_PIL_14,gr23
 856         movgs           gr23,psr
 857
 858         ldi             @(gr15,#TI_FLAGS),gr4
 859         sethi.p         %hi(_TIF_ALLWORK_MASK),gr5
 860         setlo           %lo(_TIF_ALLWORK_MASK),gr5
 861         andcc           gr4,gr5,gr0,icc0
 862         bne             icc0,#0,__syscall_exit_work
 863
 864         # restore all registers and return
 865 __entry_return_direct:
 866         LEDS            0x6301
 867
 868         andi            gr22,#~PSR_ET,gr22
 869         movgs           gr22,psr
 870
 871         ldi             @(gr28,#REG_ISR),gr23
 872         lddi            @(gr28,#REG_CCR),gr24
 873         lddi            @(gr28,#REG_LR) ,gr26
 874         ldi             @(gr28,#REG_PC) ,gr21
 875         ldi             @(gr28,#REG_TBR),gr20
 876
 877         movgs           gr20,tbr
 878         movgs           gr21,pcsr
 879         movgs           gr23,isr
 880         movgs           gr24,ccr
 881         movgs           gr25,cccr
 882         movgs           gr26,lr
 883         movgs           gr27,lcr
 884
 885         lddi            @(gr28,#REG_GNER0),gr4
 886         movgs           gr4,gner0
 887         movgs           gr5,gner1
 888
 889         lddi            @(gr28,#REG_IACC0),gr4
 890         movgs           gr4,iacc0h
 891         movgs           gr5,iacc0l
 892
 893         lddi            @(gr28,#REG_GR(4)) ,gr4
 894         lddi            @(gr28,#REG_GR(6)) ,gr6
 895         lddi            @(gr28,#REG_GR(8)) ,gr8
 896         lddi            @(gr28,#REG_GR(10)),gr10
 897         lddi            @(gr28,#REG_GR(12)),gr12
 898         lddi            @(gr28,#REG_GR(14)),gr14
 899         lddi            @(gr28,#REG_GR(16)),gr16
 900         lddi            @(gr28,#REG_GR(18)),gr18
 901         lddi            @(gr28,#REG_GR(20)),gr20
 902         lddi            @(gr28,#REG_GR(22)),gr22
 903         lddi            @(gr28,#REG_GR(24)),gr24
 904         lddi            @(gr28,#REG_GR(26)),gr26
 905         ldi             @(gr28,#REG_GR(29)),gr29
 906         lddi            @(gr28,#REG_GR(30)),gr30
 907
 908         # check to see if a debugging return is required
 909         LEDS            0x67f0
 910         movsg           ccr,gr2
 911         ldi             @(gr28,#REG__STATUS),gr3
 912         andicc          gr3,#REG__STATUS_STEP,gr0,icc0
 913         bne             icc0,#0,__entry_return_singlestep
 914         movgs           gr2,ccr
 915
 916         ldi             @(gr28,#REG_SP)    ,sp
 917         lddi            @(gr28,#REG_GR(2)) ,gr2
 918         ldi             @(gr28,#REG_GR(28)),gr28
 919
 920         LEDS            0x67fe
 921 //      movsg           pcsr,gr31
 922 //      LEDS32
 923
 924 #if 0
 925         # store the current frame in the workram on the FR451
 926         movgs           gr28,scr2
 927         sethi.p         %hi(0xfe800000),gr28
 928         setlo           %lo(0xfe800000),gr28
 929
 930         stdi            gr2,@(gr28,#REG_GR(2))
 931         stdi            gr4,@(gr28,#REG_GR(4))
 932         stdi            gr6,@(gr28,#REG_GR(6))
 933         stdi            gr8,@(gr28,#REG_GR(8))
 934         stdi            gr10,@(gr28,#REG_GR(10))
 935         stdi            gr12,@(gr28,#REG_GR(12))
 936         stdi            gr14,@(gr28,#REG_GR(14))
 937         stdi            gr16,@(gr28,#REG_GR(16))
 938         stdi            gr18,@(gr28,#REG_GR(18))
 939         stdi            gr24,@(gr28,#REG_GR(24))
 940         stdi            gr26,@(gr28,#REG_GR(26))
 941         sti             gr29,@(gr28,#REG_GR(29))
 942         stdi            gr30,@(gr28,#REG_GR(30))
 943
 944         movsg           tbr ,gr30
 945         sti             gr30,@(gr28,#REG_TBR)
 946         movsg           pcsr,gr30
 947         sti             gr30,@(gr28,#REG_PC)
 948         movsg           psr ,gr30
 949         sti             gr30,@(gr28,#REG_PSR)
 950         movsg           isr ,gr30
 951         sti             gr30,@(gr28,#REG_ISR)
 952         movsg           ccr ,gr30
 953         movsg           cccr,gr31
 954         stdi            gr30,@(gr28,#REG_CCR)
 955         movsg           lr  ,gr30
 956         movsg           lcr ,gr31
 957         stdi            gr30,@(gr28,#REG_LR)
 958         sti             gr0 ,@(gr28,#REG_SYSCALLNO)
 959         movsg           scr2,gr28
 960 #endif
 961
 962         rett            #0
 963
 964         # return via break.S
 965 __entry_return_singlestep:
 966         movgs           gr2,ccr
 967         lddi            @(gr28,#REG_GR(2)) ,gr2
 968         ldi             @(gr28,#REG_SP)    ,sp
 969         ldi             @(gr28,#REG_GR(28)),gr28
 970         LEDS            0x67ff
 971         break
 972         .globl          __entry_return_singlestep_breaks_here
 973 __entry_return_singlestep_breaks_here:
 974         nop
 975
 976
 977 ###############################################################################
 978 #
 979 # return to a process interrupted in kernel space
 980 # - we need to consider preemption if that is enabled
 981 #
 982 ###############################################################################
 983         .balign         L1_CACHE_BYTES
 984 __entry_return_from_kernel_exception:
 985         LEDS            0x6302
 986         movsg           psr,gr23
 987         ori             gr23,#PSR_PIL_14,gr23
 988         movgs           gr23,psr
 989         bra             __entry_return_direct
 990
 991         .balign         L1_CACHE_BYTES
 992 __entry_return_from_kernel_interrupt:
 993         LEDS            0x6303
 994         movsg           psr,gr23
 995         ori             gr23,#PSR_PIL_14,gr23
 996         movgs           gr23,psr
 997
 998 #ifdef CONFIG_PREEMPT
 999         ldi             @(gr15,#TI_PRE_COUNT),gr5
1000         subicc          gr5,#0,gr0,icc0
1001         beq             icc0,#0,__entry_return_direct
1002
1003 __entry_preempt_need_resched:
1004         ldi             @(gr15,#TI_FLAGS),gr4
1005         andicc          gr4,#_TIF_NEED_RESCHED,gr0,icc0
1006         beq             icc0,#1,__entry_return_direct
1007
1008         setlos          #PREEMPT_ACTIVE,gr5
1009         sti             gr5,@(gr15,#TI_FLAGS)
1010
1011         andi            gr23,#~PSR_PIL,gr23
1012         movgs           gr23,psr
1013
1014         call            schedule
1015         sti             gr0,@(gr15,#TI_PRE_COUNT)
1016
1017         movsg           psr,gr23
1018         ori             gr23,#PSR_PIL_14,gr23
1019         movgs           gr23,psr
1020         bra             __entry_preempt_need_resched
1021 #else
1022         bra             __entry_return_direct
1023 #endif
1024
1025
1026 ###############################################################################
1027 #
1028 # perform work that needs to be done immediately before resumption
1029 #
1030 ###############################################################################
1031         .globl          __entry_return_from_user_exception
1032         .balign         L1_CACHE_BYTES
1033 __entry_return_from_user_exception:
1034         LEDS            0x6501
1035
1036 __entry_resume_userspace:
1037         # make sure we don't miss an interrupt setting need_resched or sigpending between
1038         # sampling and the RETT
1039         movsg           psr,gr23
1040         ori             gr23,#PSR_PIL_14,gr23
1041         movgs           gr23,psr
1042
1043 __entry_return_from_user_interrupt:
1044         LEDS            0x6402
1045         ldi             @(gr15,#TI_FLAGS),gr4
1046         sethi.p         %hi(_TIF_WORK_MASK),gr5
1047         setlo           %lo(_TIF_WORK_MASK),gr5
1048         andcc           gr4,gr5,gr0,icc0
1049         beq             icc0,#1,__entry_return_direct
1050
1051 __entry_work_pending:
1052         LEDS            0x6404
1053         andicc          gr4,#_TIF_NEED_RESCHED,gr0,icc0
1054         beq             icc0,#1,__entry_work_notifysig
1055
1056 __entry_work_resched:
1057         LEDS            0x6408
1058         movsg           psr,gr23
1059         andi            gr23,#~PSR_PIL,gr23
1060         movgs           gr23,psr
1061         call            schedule
1062         movsg           psr,gr23
1063         ori             gr23,#PSR_PIL_14,gr23
1064         movgs           gr23,psr
1065
1066         LEDS            0x6401
1067         ldi             @(gr15,#TI_FLAGS),gr4
1068         sethi.p         %hi(_TIF_WORK_MASK),gr5
1069         setlo           %lo(_TIF_WORK_MASK),gr5
1070         andcc           gr4,gr5,gr0,icc0
1071         beq             icc0,#1,__entry_return_direct
1072         andicc          gr4,#_TIF_NEED_RESCHED,gr0,icc0
1073         bne             icc0,#1,__entry_work_resched
1074
1075 __entry_work_notifysig:
1076         LEDS            0x6410
1077         ori.p           gr4,#0,gr8
1078         call            do_notify_resume
1079         bra             __entry_return_direct
1080
1081         # perform syscall entry tracing
1082 __syscall_trace_entry:
1083         LEDS            0x6320
1084         setlos.p        #0,gr8
1085         call            do_syscall_trace
1086
1087         ldi             @(gr28,#REG_SYSCALLNO),gr7
1088         lddi            @(gr28,#REG_GR(8)) ,gr8
1089         lddi            @(gr28,#REG_GR(10)),gr10
1090         lddi.p          @(gr28,#REG_GR(12)),gr12
1091
1092         subicc          gr7,#nr_syscalls,gr0,icc0
1093         bnc             icc0,#0,__syscall_badsys
1094         bra             __syscall_call
1095
1096         # perform syscall exit tracing
1097 __syscall_exit_work:
1098         LEDS            0x6340
1099         andicc          gr4,#_TIF_SYSCALL_TRACE,gr0,icc0
1100         beq             icc0,#1,__entry_work_pending
1101
1102         movsg           psr,gr23
1103         andi            gr23,#~PSR_PIL,gr23     ; could let do_syscall_trace() call schedule()
1104         movgs           gr23,psr
1105
1106         setlos.p        #1,gr8
1107         call            do_syscall_trace
1108         bra             __entry_resume_userspace
1109
1110 __syscall_badsys:
1111         LEDS            0x6380
1112         setlos          #-ENOSYS,gr8
1113         sti             gr8,@(gr28,#REG_GR(8))  ; save return value
1114         bra             __entry_resume_userspace
1115
1116
1117 ###############################################################################
1118 #
1119 # syscall vector table
1120 #
1121 ###############################################################################
1122 #ifdef CONFIG_MMU
1123 #define __MMU(X) X
1124 #else
1125 #define __MMU(X) sys_ni_syscall
1126 #endif
1127
1128         .section .rodata
1129 ALIGN
1130         .globl          sys_call_table
1131 sys_call_table:
1132         .long sys_restart_syscall       /* 0 - old "setup()" system call, used for restarting */
1133         .long sys_exit
1134         .long sys_fork
1135         .long sys_read
1136         .long sys_write
1137         .long sys_open          /* 5 */
1138         .long sys_close
1139         .long sys_waitpid
1140         .long sys_creat
1141         .long sys_link
1142         .long sys_unlink                /* 10 */
1143         .long sys_execve
1144         .long sys_chdir
1145         .long sys_time
1146         .long sys_mknod
1147         .long sys_chmod         /* 15 */
1148         .long sys_lchown16
1149         .long sys_ni_syscall                    /* old break syscall holder */
1150         .long sys_stat
1151         .long sys_lseek
1152         .long sys_getpid                /* 20 */
1153         .long sys_mount
1154         .long sys_oldumount
1155         .long sys_setuid16
1156         .long sys_getuid16
1157         .long sys_ni_syscall // sys_stime               /* 25 */
1158         .long sys_ptrace
1159         .long sys_alarm
1160         .long sys_fstat
1161         .long sys_pause
1162         .long sys_utime         /* 30 */
1163         .long sys_ni_syscall                    /* old stty syscall holder */
1164         .long sys_ni_syscall                    /* old gtty syscall holder */
1165         .long sys_access
1166         .long sys_nice
1167         .long sys_ni_syscall    /* 35 */        /* old ftime syscall holder */
1168         .long sys_sync
1169         .long sys_kill
1170         .long sys_rename
1171         .long sys_mkdir
1172         .long sys_rmdir         /* 40 */
1173         .long sys_dup
1174         .long sys_pipe
1175         .long sys_times
1176         .long sys_ni_syscall                    /* old prof syscall holder */
1177         .long sys_brk           /* 45 */
1178         .long sys_setgid16
1179         .long sys_getgid16
1180         .long sys_ni_syscall // sys_signal
1181         .long sys_geteuid16
1182         .long sys_getegid16     /* 50 */
1183         .long sys_acct
1184         .long sys_umount                                /* recycled never used phys( */
1185         .long sys_ni_syscall                    /* old lock syscall holder */
1186         .long sys_ioctl
1187         .long sys_fcntl         /* 55 */
1188         .long sys_ni_syscall                    /* old mpx syscall holder */
1189         .long sys_setpgid
1190         .long sys_ni_syscall                    /* old ulimit syscall holder */
1191         .long sys_ni_syscall                    /* old old uname syscall */
1192         .long sys_umask         /* 60 */
1193         .long sys_chroot
1194         .long sys_ustat
1195         .long sys_dup2
1196         .long sys_getppid
1197         .long sys_getpgrp       /* 65 */
1198         .long sys_setsid
1199         .long sys_sigaction
1200         .long sys_ni_syscall // sys_sgetmask
1201         .long sys_ni_syscall // sys_ssetmask
1202         .long sys_setreuid16    /* 70 */
1203         .long sys_setregid16
1204         .long sys_sigsuspend
1205         .long sys_ni_syscall // sys_sigpending
1206         .long sys_sethostname
1207         .long sys_setrlimit     /* 75 */
1208         .long sys_ni_syscall // sys_old_getrlimit
1209         .long sys_getrusage
1210         .long sys_gettimeofday
1211         .long sys_settimeofday
1212         .long sys_getgroups16   /* 80 */
1213         .long sys_setgroups16
1214         .long sys_ni_syscall                    /* old_select slot */
1215         .long sys_symlink
1216         .long sys_lstat
1217         .long sys_readlink              /* 85 */
1218         .long sys_uselib
1219         .long sys_swapon
1220         .long sys_reboot
1221         .long sys_ni_syscall // old_readdir
1222         .long sys_ni_syscall    /* 90 */        /* old_mmap slot */
1223         .long sys_munmap
1224         .long sys_truncate
1225         .long sys_ftruncate
1226         .long sys_fchmod
1227         .long sys_fchown16              /* 95 */
1228         .long sys_getpriority
1229         .long sys_setpriority
1230         .long sys_ni_syscall                    /* old profil syscall holder */
1231         .long sys_statfs
1232         .long sys_fstatfs               /* 100 */
1233         .long sys_ni_syscall                    /* ioperm for i386 */
1234         .long sys_socketcall
1235         .long sys_syslog
1236         .long sys_setitimer
1237         .long sys_getitimer     /* 105 */
1238         .long sys_newstat
1239         .long sys_newlstat
1240         .long sys_newfstat
1241         .long sys_ni_syscall    /* obsolete olduname( syscall */
1242         .long sys_ni_syscall    /* iopl for i386 */ /* 110 */
1243         .long sys_vhangup
1244         .long sys_ni_syscall    /* obsolete idle( syscall */
1245         .long sys_ni_syscall    /* vm86old for i386 */
1246         .long sys_wait4
1247         .long sys_swapoff               /* 115 */
1248         .long sys_sysinfo
1249         .long sys_ipc
1250         .long sys_fsync
1251         .long sys_sigreturn
1252         .long sys_clone         /* 120 */
1253         .long sys_setdomainname
1254         .long sys_newuname
1255         .long sys_ni_syscall    /* old "cacheflush" */
1256         .long sys_adjtimex
1257         .long __MMU(sys_mprotect) /* 125 */
1258         .long sys_sigprocmask
1259         .long sys_ni_syscall    /* old "create_module" */
1260         .long sys_init_module
1261         .long sys_delete_module
1262         .long sys_ni_syscall    /* old "get_kernel_syms" */
1263         .long sys_quotactl
1264         .long sys_getpgid
1265         .long sys_fchdir
1266         .long sys_bdflush
1267         .long sys_sysfs         /* 135 */
1268         .long sys_personality
1269         .long sys_ni_syscall    /* for afs_syscall */
1270         .long sys_setfsuid16
1271         .long sys_setfsgid16
1272         .long sys_llseek                /* 140 */
1273         .long sys_getdents
1274         .long sys_select
1275         .long sys_flock
1276         .long __MMU(sys_msync)
1277         .long sys_readv         /* 145 */
1278         .long sys_writev
1279         .long sys_getsid
1280         .long sys_fdatasync
1281         .long sys_sysctl
1282         .long __MMU(sys_mlock)          /* 150 */
1283         .long __MMU(sys_munlock)
1284         .long __MMU(sys_mlockall)
1285         .long __MMU(sys_munlockall)
1286         .long sys_sched_setparam
1287         .long sys_sched_getparam   /* 155 */
1288         .long sys_sched_setscheduler
1289         .long sys_sched_getscheduler
1290         .long sys_sched_yield
1291         .long sys_sched_get_priority_max
1292         .long sys_sched_get_priority_min  /* 160 */
1293         .long sys_sched_rr_get_interval
1294         .long sys_nanosleep
1295         .long __MMU(sys_mremap)
1296         .long sys_setresuid16
1297         .long sys_getresuid16   /* 165 */
1298         .long sys_ni_syscall    /* for vm86 */
1299         .long sys_ni_syscall    /* Old sys_query_module */
1300         .long sys_poll
1301         .long sys_nfsservctl
1302         .long sys_setresgid16   /* 170 */
1303         .long sys_getresgid16
1304         .long sys_prctl
1305         .long sys_rt_sigreturn
1306         .long sys_rt_sigaction
1307         .long sys_rt_sigprocmask        /* 175 */
1308         .long sys_rt_sigpending
1309         .long sys_rt_sigtimedwait
1310         .long sys_rt_sigqueueinfo
1311         .long sys_rt_sigsuspend
1312         .long sys_pread64               /* 180 */
1313         .long sys_pwrite64
1314         .long sys_chown16
1315         .long sys_getcwd
1316         .long sys_capget
1317         .long sys_capset           /* 185 */
1318         .long sys_sigaltstack
1319         .long sys_sendfile
1320         .long sys_ni_syscall            /* streams1 */
1321         .long sys_ni_syscall            /* streams2 */
1322         .long sys_vfork            /* 190 */
1323         .long sys_getrlimit
1324         .long sys_mmap2
1325         .long sys_truncate64
1326         .long sys_ftruncate64
1327         .long sys_stat64                /* 195 */
1328         .long sys_lstat64
1329         .long sys_fstat64
1330         .long sys_lchown
1331         .long sys_getuid
1332         .long sys_getgid                /* 200 */
1333         .long sys_geteuid
1334         .long sys_getegid
1335         .long sys_setreuid
1336         .long sys_setregid
1337         .long sys_getgroups     /* 205 */
1338         .long sys_setgroups
1339         .long sys_fchown
1340         .long sys_setresuid
1341         .long sys_getresuid
1342         .long sys_setresgid     /* 210 */
1343         .long sys_getresgid
1344         .long sys_chown
1345         .long sys_setuid
1346         .long sys_setgid
1347         .long sys_setfsuid              /* 215 */
1348         .long sys_setfsgid
1349         .long sys_pivot_root
1350         .long __MMU(sys_mincore)
1351         .long __MMU(sys_madvise)
1352         .long sys_getdents64    /* 220 */
1353         .long sys_fcntl64
1354         .long sys_ni_syscall    /* reserved for TUX */
1355         .long sys_ni_syscall    /* Reserved for Security */
1356         .long sys_gettid
1357         .long sys_readahead     /* 225 */
1358         .long sys_setxattr
1359         .long sys_lsetxattr
1360         .long sys_fsetxattr
1361         .long sys_getxattr
1362         .long sys_lgetxattr     /* 230 */
1363         .long sys_fgetxattr
1364         .long sys_listxattr
1365         .long sys_llistxattr
1366         .long sys_flistxattr
1367         .long sys_removexattr   /* 235 */
1368         .long sys_lremovexattr
1369         .long sys_fremovexattr
1370         .long sys_tkill
1371         .long sys_sendfile64
1372         .long sys_futex         /* 240 */
1373         .long sys_sched_setaffinity
1374         .long sys_sched_getaffinity
1375         .long sys_ni_syscall    //sys_set_thread_area
1376         .long sys_ni_syscall    //sys_get_thread_area
1377         .long sys_io_setup      /* 245 */
1378         .long sys_io_destroy
1379         .long sys_io_getevents
1380         .long sys_io_submit
1381         .long sys_io_cancel
1382         .long sys_fadvise64     /* 250 */
1383         .long sys_ni_syscall
1384         .long sys_exit_group
1385         .long sys_lookup_dcookie
1386         .long sys_epoll_create
1387         .long sys_epoll_ctl     /* 255 */
1388         .long sys_epoll_wait
1389         .long __MMU(sys_remap_file_pages)
1390         .long sys_set_tid_address
1391         .long sys_timer_create
1392         .long sys_timer_settime         /* 260 */
1393         .long sys_timer_gettime
1394         .long sys_timer_getoverrun
1395         .long sys_timer_delete
1396         .long sys_clock_settime
1397         .long sys_clock_gettime         /* 265 */
1398         .long sys_clock_getres
1399         .long sys_clock_nanosleep
1400         .long sys_statfs64
1401         .long sys_fstatfs64
1402         .long sys_tgkill        /* 270 */
1403         .long sys_utimes
1404         .long sys_fadvise64_64
1405         .long sys_ni_syscall    /* sys_vserver */
1406         .long sys_mbind
1407         .long sys_get_mempolicy
1408         .long sys_set_mempolicy
1409         .long sys_mq_open
1410         .long sys_mq_unlink
1411         .long sys_mq_timedsend
1412         .long sys_mq_timedreceive       /* 280 */
1413         .long sys_mq_notify
1414         .long sys_mq_getsetattr
1415         .long sys_ni_syscall            /* reserved for kexec */
1416         .long sys_waitid
1417         .long sys_ni_syscall            /* 285 */ /* available */
1418         .long sys_add_key
1419         .long sys_request_key
1420         .long sys_keyctl
1421         .long sys_ni_syscall // sys_vperfctr_open
1422         .long sys_ni_syscall // sys_vperfctr_control    /* 290 */
1423         .long sys_ni_syscall // sys_vperfctr_unlink
1424         .long sys_ni_syscall // sys_vperfctr_iresume
1425         .long sys_ni_syscall // sys_vperfctr_read
1426
1427
1428 syscall_table_size = (. - sys_call_table)