LXR linux/arch/ia64/kernel/head.S

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Here is where the ball gets rolling as far as the kernel is concerned.
   4 * When control is transferred to _start, the bootload has already
   5 * loaded us to the correct address.  All that's left to do here is
   6 * to set up the kernel's global pointer and jump to the kernel
   7 * entry point.
   8 *
   9 * Copyright (C) 1998-2001, 2003, 2005 Hewlett-Packard Co
  10 *      David Mosberger-Tang <davidm@hpl.hp.com>
  11 *      Stephane Eranian <eranian@hpl.hp.com>
  12 * Copyright (C) 1999 VA Linux Systems
  13 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
  14 * Copyright (C) 1999 Intel Corp.
  15 * Copyright (C) 1999 Asit Mallick <Asit.K.Mallick@intel.com>
  16 * Copyright (C) 1999 Don Dugger <Don.Dugger@intel.com>
  17 * Copyright (C) 2002 Fenghua Yu <fenghua.yu@intel.com>
  18 *   -Optimize __ia64_save_fpu() and __ia64_load_fpu() for Itanium 2.
  19 * Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com>
  20 *   Support for CPU Hotplug
  21 */
  22
  23
  24#include <linux/pgtable.h>
  25#include <asm/asmmacro.h>
  26#include <asm/fpu.h>
  27#include <asm/kregs.h>
  28#include <asm/mmu_context.h>
  29#include <asm/asm-offsets.h>
  30#include <asm/pal.h>
  31#include <asm/processor.h>
  32#include <asm/ptrace.h>
  33#include <asm/mca_asm.h>
  34#include <linux/init.h>
  35#include <linux/linkage.h>
  36#include <asm/export.h>
  37
  38#ifdef CONFIG_HOTPLUG_CPU
  39#define SAL_PSR_BITS_TO_SET                             \
  40        (IA64_PSR_AC | IA64_PSR_BN | IA64_PSR_MFH | IA64_PSR_MFL)
  41
  42#define SAVE_FROM_REG(src, ptr, dest)   \
  43        mov dest=src;;                                          \
  44        st8 [ptr]=dest,0x08
  45
  46#define RESTORE_REG(reg, ptr, _tmp)             \
  47        ld8 _tmp=[ptr],0x08;;                           \
  48        mov reg=_tmp
  49
  50#define SAVE_BREAK_REGS(ptr, _idx, _breg, _dest)\
  51        mov ar.lc=IA64_NUM_DBG_REGS-1;;                         \
  52        mov _idx=0;;                                                            \
  531:                                                                                              \
  54        SAVE_FROM_REG(_breg[_idx], ptr, _dest);;        \
  55        add _idx=1,_idx;;                                                       \
  56        br.cloop.sptk.many 1b
  57
  58#define RESTORE_BREAK_REGS(ptr, _idx, _breg, _tmp, _lbl)\
  59        mov ar.lc=IA64_NUM_DBG_REGS-1;;                 \
  60        mov _idx=0;;                                                    \
  61_lbl:  RESTORE_REG(_breg[_idx], ptr, _tmp);;    \
  62        add _idx=1, _idx;;                                              \
  63        br.cloop.sptk.many _lbl
  64
  65#define SAVE_ONE_RR(num, _reg, _tmp) \
  66        movl _tmp=(num<<61);;   \
  67        mov _reg=rr[_tmp]
  68
  69#define SAVE_REGION_REGS(_tmp, _r0, _r1, _r2, _r3, _r4, _r5, _r6, _r7) \
  70        SAVE_ONE_RR(0,_r0, _tmp);; \
  71        SAVE_ONE_RR(1,_r1, _tmp);; \
  72        SAVE_ONE_RR(2,_r2, _tmp);; \
  73        SAVE_ONE_RR(3,_r3, _tmp);; \
  74        SAVE_ONE_RR(4,_r4, _tmp);; \
  75        SAVE_ONE_RR(5,_r5, _tmp);; \
  76        SAVE_ONE_RR(6,_r6, _tmp);; \
  77        SAVE_ONE_RR(7,_r7, _tmp);;
  78
  79#define STORE_REGION_REGS(ptr, _r0, _r1, _r2, _r3, _r4, _r5, _r6, _r7) \
  80        st8 [ptr]=_r0, 8;; \
  81        st8 [ptr]=_r1, 8;; \
  82        st8 [ptr]=_r2, 8;; \
  83        st8 [ptr]=_r3, 8;; \
  84        st8 [ptr]=_r4, 8;; \
  85        st8 [ptr]=_r5, 8;; \
  86        st8 [ptr]=_r6, 8;; \
  87        st8 [ptr]=_r7, 8;;
  88
  89#define RESTORE_REGION_REGS(ptr, _idx1, _idx2, _tmp) \
  90        mov             ar.lc=0x08-1;;                                          \
  91        movl    _idx1=0x00;;                                            \
  92RestRR:                                                                                 \
  93        dep.z   _idx2=_idx1,61,3;;                                      \
  94        ld8             _tmp=[ptr],8;;                                          \
  95        mov             rr[_idx2]=_tmp;;                                        \
  96        srlz.d;;                                                                        \
  97        add             _idx1=1,_idx1;;                                         \
  98        br.cloop.sptk.few       RestRR
  99
 100#define SET_AREA_FOR_BOOTING_CPU(reg1, reg2) \
 101        movl reg1=sal_state_for_booting_cpu;;   \
 102        ld8 reg2=[reg1];;
 103
 104/*
 105 * Adjust region registers saved before starting to save
 106 * break regs and rest of the states that need to be preserved.
 107 */
 108#define SAL_TO_OS_BOOT_HANDOFF_STATE_SAVE(_reg1,_reg2,_pred)  \
 109        SAVE_FROM_REG(b0,_reg1,_reg2);;                                         \
 110        SAVE_FROM_REG(b1,_reg1,_reg2);;                                         \
 111        SAVE_FROM_REG(b2,_reg1,_reg2);;                                         \
 112        SAVE_FROM_REG(b3,_reg1,_reg2);;                                         \
 113        SAVE_FROM_REG(b4,_reg1,_reg2);;                                         \
 114        SAVE_FROM_REG(b5,_reg1,_reg2);;                                         \
 115        st8 [_reg1]=r1,0x08;;                                                           \
 116        st8 [_reg1]=r12,0x08;;                                                          \
 117        st8 [_reg1]=r13,0x08;;                                                          \
 118        SAVE_FROM_REG(ar.fpsr,_reg1,_reg2);;                            \
 119        SAVE_FROM_REG(ar.pfs,_reg1,_reg2);;                                     \
 120        SAVE_FROM_REG(ar.rnat,_reg1,_reg2);;                            \
 121        SAVE_FROM_REG(ar.unat,_reg1,_reg2);;                            \
 122        SAVE_FROM_REG(ar.bspstore,_reg1,_reg2);;                        \
 123        SAVE_FROM_REG(cr.dcr,_reg1,_reg2);;                                     \
 124        SAVE_FROM_REG(cr.iva,_reg1,_reg2);;                                     \
 125        SAVE_FROM_REG(cr.pta,_reg1,_reg2);;                                     \
 126        SAVE_FROM_REG(cr.itv,_reg1,_reg2);;                                     \
 127        SAVE_FROM_REG(cr.pmv,_reg1,_reg2);;                                     \
 128        SAVE_FROM_REG(cr.cmcv,_reg1,_reg2);;                            \
 129        SAVE_FROM_REG(cr.lrr0,_reg1,_reg2);;                            \
 130        SAVE_FROM_REG(cr.lrr1,_reg1,_reg2);;                            \
 131        st8 [_reg1]=r4,0x08;;                                                           \
 132        st8 [_reg1]=r5,0x08;;                                                           \
 133        st8 [_reg1]=r6,0x08;;                                                           \
 134        st8 [_reg1]=r7,0x08;;                                                           \
 135        st8 [_reg1]=_pred,0x08;;                                                        \
 136        SAVE_FROM_REG(ar.lc, _reg1, _reg2);;                            \
 137        stf.spill.nta [_reg1]=f2,16;;                                           \
 138        stf.spill.nta [_reg1]=f3,16;;                                           \
 139        stf.spill.nta [_reg1]=f4,16;;                                           \
 140        stf.spill.nta [_reg1]=f5,16;;                                           \
 141        stf.spill.nta [_reg1]=f16,16;;                                          \
 142        stf.spill.nta [_reg1]=f17,16;;                                          \
 143        stf.spill.nta [_reg1]=f18,16;;                                          \
 144        stf.spill.nta [_reg1]=f19,16;;                                          \
 145        stf.spill.nta [_reg1]=f20,16;;                                          \
 146        stf.spill.nta [_reg1]=f21,16;;                                          \
 147        stf.spill.nta [_reg1]=f22,16;;                                          \
 148        stf.spill.nta [_reg1]=f23,16;;                                          \
 149        stf.spill.nta [_reg1]=f24,16;;                                          \
 150        stf.spill.nta [_reg1]=f25,16;;                                          \
 151        stf.spill.nta [_reg1]=f26,16;;                                          \
 152        stf.spill.nta [_reg1]=f27,16;;                                          \
 153        stf.spill.nta [_reg1]=f28,16;;                                          \
 154        stf.spill.nta [_reg1]=f29,16;;                                          \
 155        stf.spill.nta [_reg1]=f30,16;;                                          \
 156        stf.spill.nta [_reg1]=f31,16;;
 157
 158#else
 159#define SET_AREA_FOR_BOOTING_CPU(a1, a2)
 160#define SAL_TO_OS_BOOT_HANDOFF_STATE_SAVE(a1,a2, a3)
 161#define SAVE_REGION_REGS(_tmp, _r0, _r1, _r2, _r3, _r4, _r5, _r6, _r7)
 162#define STORE_REGION_REGS(ptr, _r0, _r1, _r2, _r3, _r4, _r5, _r6, _r7)
 163#endif
 164
 165#define SET_ONE_RR(num, pgsize, _tmp1, _tmp2, vhpt) \
 166        movl _tmp1=(num << 61);;        \
 167        mov _tmp2=((ia64_rid(IA64_REGION_ID_KERNEL, (num<<61)) << 8) | (pgsize << 2) | vhpt);; \
 168        mov rr[_tmp1]=_tmp2
 169
 170        __PAGE_ALIGNED_DATA
 171
 172        .global empty_zero_page
 173EXPORT_DATA_SYMBOL_GPL(empty_zero_page)
 174empty_zero_page:
 175        .skip PAGE_SIZE
 176
 177        .global swapper_pg_dir
 178swapper_pg_dir:
 179        .skip PAGE_SIZE
 180
 181        .rodata
 182halt_msg:
 183        stringz "Halting kernel\n"
 184
 185        __REF
 186
 187        .global start_ap
 188
 189        /*
 190         * Start the kernel.  When the bootloader passes control to _start(), r28
 191         * points to the address of the boot parameter area.  Execution reaches
 192         * here in physical mode.
 193         */
 194GLOBAL_ENTRY(_start)
 195start_ap:
 196        .prologue
 197        .save rp, r0            // terminate unwind chain with a NULL rp
 198        .body
 199
 200        rsm psr.i | psr.ic
 201        ;;
 202        srlz.i
 203        ;;
 204 {
 205        flushrs                         // must be first insn in group
 206        srlz.i
 207 }
 208        ;;
 209        /*
 210         * Save the region registers, predicate before they get clobbered
 211         */
 212        SAVE_REGION_REGS(r2, r8,r9,r10,r11,r12,r13,r14,r15);
 213        mov r25=pr;;
 214
 215        /*
 216         * Initialize kernel region registers:
 217         *      rr[0]: VHPT enabled, page size = PAGE_SHIFT
 218         *      rr[1]: VHPT enabled, page size = PAGE_SHIFT
 219         *      rr[2]: VHPT enabled, page size = PAGE_SHIFT
 220         *      rr[3]: VHPT enabled, page size = PAGE_SHIFT
 221         *      rr[4]: VHPT enabled, page size = PAGE_SHIFT
 222         *      rr[5]: VHPT enabled, page size = PAGE_SHIFT
 223         *      rr[6]: VHPT disabled, page size = IA64_GRANULE_SHIFT
 224         *      rr[7]: VHPT disabled, page size = IA64_GRANULE_SHIFT
 225         * We initialize all of them to prevent inadvertently assuming
 226         * something about the state of address translation early in boot.
 227         */
 228        SET_ONE_RR(0, PAGE_SHIFT, r2, r16, 1);;
 229        SET_ONE_RR(1, PAGE_SHIFT, r2, r16, 1);;
 230        SET_ONE_RR(2, PAGE_SHIFT, r2, r16, 1);;
 231        SET_ONE_RR(3, PAGE_SHIFT, r2, r16, 1);;
 232        SET_ONE_RR(4, PAGE_SHIFT, r2, r16, 1);;
 233        SET_ONE_RR(5, PAGE_SHIFT, r2, r16, 1);;
 234        SET_ONE_RR(6, IA64_GRANULE_SHIFT, r2, r16, 0);;
 235        SET_ONE_RR(7, IA64_GRANULE_SHIFT, r2, r16, 0);;
 236        /*
 237         * Now pin mappings into the TLB for kernel text and data
 238         */
 239        mov r18=KERNEL_TR_PAGE_SHIFT<<2
 240        movl r17=KERNEL_START
 241        ;;
 242        mov cr.itir=r18
 243        mov cr.ifa=r17
 244        mov r16=IA64_TR_KERNEL
 245        mov r3=ip
 246        movl r18=PAGE_KERNEL
 247        ;;
 248        dep r2=0,r3,0,KERNEL_TR_PAGE_SHIFT
 249        ;;
 250        or r18=r2,r18
 251        ;;
 252        srlz.i
 253        ;;
 254        itr.i itr[r16]=r18
 255        ;;
 256        itr.d dtr[r16]=r18
 257        ;;
 258        srlz.i
 259
 260        /*
 261         * Switch into virtual mode:
 262         */
 263        movl r16=(IA64_PSR_IT|IA64_PSR_IC|IA64_PSR_DT|IA64_PSR_RT|IA64_PSR_DFH|IA64_PSR_BN \
 264                  |IA64_PSR_DI)
 265        ;;
 266        mov cr.ipsr=r16
 267        movl r17=1f
 268        ;;
 269        mov cr.iip=r17
 270        mov cr.ifs=r0
 271        ;;
 272        rfi
 273        ;;
 2741:      // now we are in virtual mode
 275
 276        SET_AREA_FOR_BOOTING_CPU(r2, r16);
 277
 278        STORE_REGION_REGS(r16, r8,r9,r10,r11,r12,r13,r14,r15);
 279        SAL_TO_OS_BOOT_HANDOFF_STATE_SAVE(r16,r17,r25)
 280        ;;
 281
 282        // set IVT entry point---can't access I/O ports without it
 283        movl r3=ia64_ivt
 284        ;;
 285        mov cr.iva=r3
 286        movl r2=FPSR_DEFAULT
 287        ;;
 288        srlz.i
 289        movl gp=__gp
 290
 291        mov ar.fpsr=r2
 292        ;;
 293
 294#define isAP    p2      // are we an Application Processor?
 295#define isBP    p3      // are we the Bootstrap Processor?
 296
 297#ifdef CONFIG_SMP
 298        /*
 299         * Find the init_task for the currently booting CPU.  At poweron, and in
 300         * UP mode, task_for_booting_cpu is NULL.
 301         */
 302        movl r3=task_for_booting_cpu
 303        ;;
 304        ld8 r3=[r3]
 305        movl r2=init_task
 306        ;;
 307        cmp.eq isBP,isAP=r3,r0
 308        ;;
 309(isAP)  mov r2=r3
 310#else
 311        movl r2=init_task
 312        cmp.eq isBP,isAP=r0,r0
 313#endif
 314        ;;
 315        tpa r3=r2               // r3 == phys addr of task struct
 316        mov r16=-1
 317(isBP)  br.cond.dpnt .load_current // BP stack is on region 5 --- no need to map it
 318
 319        // load mapping for stack (virtaddr in r2, physaddr in r3)
 320        rsm psr.ic
 321        movl r17=PAGE_KERNEL
 322        ;;
 323        srlz.d
 324        dep r18=0,r3,0,12
 325        ;;
 326        or r18=r17,r18
 327        dep r2=-1,r3,61,3       // IMVA of task
 328        ;;
 329        mov r17=rr[r2]
 330        shr.u r16=r3,IA64_GRANULE_SHIFT
 331        ;;
 332        dep r17=0,r17,8,24
 333        ;;
 334        mov cr.itir=r17
 335        mov cr.ifa=r2
 336
 337        mov r19=IA64_TR_CURRENT_STACK
 338        ;;
 339        itr.d dtr[r19]=r18
 340        ;;
 341        ssm psr.ic
 342        srlz.d
 343        ;;
 344
 345.load_current:
 346        // load the "current" pointer (r13) and ar.k6 with the current task
 347        mov IA64_KR(CURRENT)=r2         // virtual address
 348        mov IA64_KR(CURRENT_STACK)=r16
 349        mov r13=r2
 350        /*
 351         * Reserve space at the top of the stack for "struct pt_regs".  Kernel
 352         * threads don't store interesting values in that structure, but the space
 353         * still needs to be there because time-critical stuff such as the context
 354         * switching can be implemented more efficiently (for example, __switch_to()
 355         * always sets the psr.dfh bit of the task it is switching to).
 356         */
 357
 358        addl r12=IA64_STK_OFFSET-IA64_PT_REGS_SIZE-16,r2
 359        addl r2=IA64_RBS_OFFSET,r2      // initialize the RSE
 360        mov ar.rsc=0            // place RSE in enforced lazy mode
 361        ;;
 362        loadrs                  // clear the dirty partition
 363        movl r19=__phys_per_cpu_start
 364        mov r18=PERCPU_PAGE_SIZE
 365        ;;
 366#ifndef CONFIG_SMP
 367        add r19=r19,r18
 368        ;;
 369#else
 370(isAP)  br.few 2f
 371        movl r20=__cpu0_per_cpu
 372        ;;
 373        shr.u r18=r18,3
 3741:
 375        ld8 r21=[r19],8;;
 376        st8[r20]=r21,8
 377        adds r18=-1,r18;;
 378        cmp4.lt p7,p6=0,r18
 379(p7)    br.cond.dptk.few 1b
 380        mov r19=r20
 381        ;;
 3822:
 383#endif
 384        tpa r19=r19
 385        ;;
 386        .pred.rel.mutex isBP,isAP
 387(isBP)  mov IA64_KR(PER_CPU_DATA)=r19   // per-CPU base for cpu0
 388(isAP)  mov IA64_KR(PER_CPU_DATA)=r0    // clear physical per-CPU base
 389        ;;
 390        mov ar.bspstore=r2      // establish the new RSE stack
 391        ;;
 392        mov ar.rsc=0x3          // place RSE in eager mode
 393
 394(isBP)  dep r28=-1,r28,61,3     // make address virtual
 395(isBP)  movl r2=ia64_boot_param
 396        ;;
 397(isBP)  st8 [r2]=r28            // save the address of the boot param area passed by the bootloader
 398
 399#ifdef CONFIG_SMP
 400(isAP)  br.call.sptk.many rp=start_secondary
 401.ret0:
 402(isAP)  br.cond.sptk self
 403#endif
 404
 405        // This is executed by the bootstrap processor (bsp) only:
 406
 407        br.call.sptk.many rp=start_kernel
 408.ret2:  addl r3=@ltoff(halt_msg),gp
 409        ;;
 410        alloc r2=ar.pfs,8,0,2,0
 411        ;;
 412        ld8 out0=[r3]
 413        br.call.sptk.many b0=console_print
 414
 415self:   hint @pause
 416        br.sptk.many self               // endless loop
 417END(_start)
 418
 419        .text
 420
 421GLOBAL_ENTRY(ia64_save_debug_regs)
 422        alloc r16=ar.pfs,1,0,0,0
 423        mov r20=ar.lc                   // preserve ar.lc
 424        mov ar.lc=IA64_NUM_DBG_REGS-1
 425        mov r18=0
 426        add r19=IA64_NUM_DBG_REGS*8,in0
 427        ;;
 4281:      mov r16=dbr[r18]
 429#ifdef CONFIG_ITANIUM
 430        ;;
 431        srlz.d
 432#endif
 433        mov r17=ibr[r18]
 434        add r18=1,r18
 435        ;;
 436        st8.nta [in0]=r16,8
 437        st8.nta [r19]=r17,8
 438        br.cloop.sptk.many 1b
 439        ;;
 440        mov ar.lc=r20                   // restore ar.lc
 441        br.ret.sptk.many rp
 442END(ia64_save_debug_regs)
 443
 444GLOBAL_ENTRY(ia64_load_debug_regs)
 445        alloc r16=ar.pfs,1,0,0,0
 446        lfetch.nta [in0]
 447        mov r20=ar.lc                   // preserve ar.lc
 448        add r19=IA64_NUM_DBG_REGS*8,in0
 449        mov ar.lc=IA64_NUM_DBG_REGS-1
 450        mov r18=-1
 451        ;;
 4521:      ld8.nta r16=[in0],8
 453        ld8.nta r17=[r19],8
 454        add r18=1,r18
 455        ;;
 456        mov dbr[r18]=r16
 457#ifdef CONFIG_ITANIUM
 458        ;;
 459        srlz.d                          // Errata 132 (NoFix status)
 460#endif
 461        mov ibr[r18]=r17
 462        br.cloop.sptk.many 1b
 463        ;;
 464        mov ar.lc=r20                   // restore ar.lc
 465        br.ret.sptk.many rp
 466END(ia64_load_debug_regs)
 467
 468GLOBAL_ENTRY(__ia64_save_fpu)
 469        alloc r2=ar.pfs,1,4,0,0
 470        adds loc0=96*16-16,in0
 471        adds loc1=96*16-16-128,in0
 472        ;;
 473        stf.spill.nta [loc0]=f127,-256
 474        stf.spill.nta [loc1]=f119,-256
 475        ;;
 476        stf.spill.nta [loc0]=f111,-256
 477        stf.spill.nta [loc1]=f103,-256
 478        ;;
 479        stf.spill.nta [loc0]=f95,-256
 480        stf.spill.nta [loc1]=f87,-256
 481        ;;
 482        stf.spill.nta [loc0]=f79,-256
 483        stf.spill.nta [loc1]=f71,-256
 484        ;;
 485        stf.spill.nta [loc0]=f63,-256
 486        stf.spill.nta [loc1]=f55,-256
 487        adds loc2=96*16-32,in0
 488        ;;
 489        stf.spill.nta [loc0]=f47,-256
 490        stf.spill.nta [loc1]=f39,-256
 491        adds loc3=96*16-32-128,in0
 492        ;;
 493        stf.spill.nta [loc2]=f126,-256
 494        stf.spill.nta [loc3]=f118,-256
 495        ;;
 496        stf.spill.nta [loc2]=f110,-256
 497        stf.spill.nta [loc3]=f102,-256
 498        ;;
 499        stf.spill.nta [loc2]=f94,-256
 500        stf.spill.nta [loc3]=f86,-256
 501        ;;
 502        stf.spill.nta [loc2]=f78,-256
 503        stf.spill.nta [loc3]=f70,-256
 504        ;;
 505        stf.spill.nta [loc2]=f62,-256
 506        stf.spill.nta [loc3]=f54,-256
 507        adds loc0=96*16-48,in0
 508        ;;
 509        stf.spill.nta [loc2]=f46,-256
 510        stf.spill.nta [loc3]=f38,-256
 511        adds loc1=96*16-48-128,in0
 512        ;;
 513        stf.spill.nta [loc0]=f125,-256
 514        stf.spill.nta [loc1]=f117,-256
 515        ;;
 516        stf.spill.nta [loc0]=f109,-256
 517        stf.spill.nta [loc1]=f101,-256
 518        ;;
 519        stf.spill.nta [loc0]=f93,-256
 520        stf.spill.nta [loc1]=f85,-256
 521        ;;
 522        stf.spill.nta [loc0]=f77,-256
 523        stf.spill.nta [loc1]=f69,-256
 524        ;;
 525        stf.spill.nta [loc0]=f61,-256
 526        stf.spill.nta [loc1]=f53,-256
 527        adds loc2=96*16-64,in0
 528        ;;
 529        stf.spill.nta [loc0]=f45,-256
 530        stf.spill.nta [loc1]=f37,-256
 531        adds loc3=96*16-64-128,in0
 532        ;;
 533        stf.spill.nta [loc2]=f124,-256
 534        stf.spill.nta [loc3]=f116,-256
 535        ;;
 536        stf.spill.nta [loc2]=f108,-256
 537        stf.spill.nta [loc3]=f100,-256
 538        ;;
 539        stf.spill.nta [loc2]=f92,-256
 540        stf.spill.nta [loc3]=f84,-256
 541        ;;
 542        stf.spill.nta [loc2]=f76,-256
 543        stf.spill.nta [loc3]=f68,-256
 544        ;;
 545        stf.spill.nta [loc2]=f60,-256
 546        stf.spill.nta [loc3]=f52,-256
 547        adds loc0=96*16-80,in0
 548        ;;
 549        stf.spill.nta [loc2]=f44,-256
 550        stf.spill.nta [loc3]=f36,-256
 551        adds loc1=96*16-80-128,in0
 552        ;;
 553        stf.spill.nta [loc0]=f123,-256
 554        stf.spill.nta [loc1]=f115,-256
 555        ;;
 556        stf.spill.nta [loc0]=f107,-256
 557        stf.spill.nta [loc1]=f99,-256
 558        ;;
 559        stf.spill.nta [loc0]=f91,-256
 560        stf.spill.nta [loc1]=f83,-256
 561        ;;
 562        stf.spill.nta [loc0]=f75,-256
 563        stf.spill.nta [loc1]=f67,-256
 564        ;;
 565        stf.spill.nta [loc0]=f59,-256
 566        stf.spill.nta [loc1]=f51,-256
 567        adds loc2=96*16-96,in0
 568        ;;
 569        stf.spill.nta [loc0]=f43,-256
 570        stf.spill.nta [loc1]=f35,-256
 571        adds loc3=96*16-96-128,in0
 572        ;;
 573        stf.spill.nta [loc2]=f122,-256
 574        stf.spill.nta [loc3]=f114,-256
 575        ;;
 576        stf.spill.nta [loc2]=f106,-256
 577        stf.spill.nta [loc3]=f98,-256
 578        ;;
 579        stf.spill.nta [loc2]=f90,-256
 580        stf.spill.nta [loc3]=f82,-256
 581        ;;
 582        stf.spill.nta [loc2]=f74,-256
 583        stf.spill.nta [loc3]=f66,-256
 584        ;;
 585        stf.spill.nta [loc2]=f58,-256
 586        stf.spill.nta [loc3]=f50,-256
 587        adds loc0=96*16-112,in0
 588        ;;
 589        stf.spill.nta [loc2]=f42,-256
 590        stf.spill.nta [loc3]=f34,-256
 591        adds loc1=96*16-112-128,in0
 592        ;;
 593        stf.spill.nta [loc0]=f121,-256
 594        stf.spill.nta [loc1]=f113,-256
 595        ;;
 596        stf.spill.nta [loc0]=f105,-256
 597        stf.spill.nta [loc1]=f97,-256
 598        ;;
 599        stf.spill.nta [loc0]=f89,-256
 600        stf.spill.nta [loc1]=f81,-256
 601        ;;
 602        stf.spill.nta [loc0]=f73,-256
 603        stf.spill.nta [loc1]=f65,-256
 604        ;;
 605        stf.spill.nta [loc0]=f57,-256
 606        stf.spill.nta [loc1]=f49,-256
 607        adds loc2=96*16-128,in0
 608        ;;
 609        stf.spill.nta [loc0]=f41,-256
 610        stf.spill.nta [loc1]=f33,-256
 611        adds loc3=96*16-128-128,in0
 612        ;;
 613        stf.spill.nta [loc2]=f120,-256
 614        stf.spill.nta [loc3]=f112,-256
 615        ;;
 616        stf.spill.nta [loc2]=f104,-256
 617        stf.spill.nta [loc3]=f96,-256
 618        ;;
 619        stf.spill.nta [loc2]=f88,-256
 620        stf.spill.nta [loc3]=f80,-256
 621        ;;
 622        stf.spill.nta [loc2]=f72,-256
 623        stf.spill.nta [loc3]=f64,-256
 624        ;;
 625        stf.spill.nta [loc2]=f56,-256
 626        stf.spill.nta [loc3]=f48,-256
 627        ;;
 628        stf.spill.nta [loc2]=f40
 629        stf.spill.nta [loc3]=f32
 630        br.ret.sptk.many rp
 631END(__ia64_save_fpu)
 632
 633GLOBAL_ENTRY(__ia64_load_fpu)
 634        alloc r2=ar.pfs,1,2,0,0
 635        adds r3=128,in0
 636        adds r14=256,in0
 637        adds r15=384,in0
 638        mov loc0=512
 639        mov loc1=-1024+16
 640        ;;
 641        ldf.fill.nta f32=[in0],loc0
 642        ldf.fill.nta f40=[ r3],loc0
 643        ldf.fill.nta f48=[r14],loc0
 644        ldf.fill.nta f56=[r15],loc0
 645        ;;
 646        ldf.fill.nta f64=[in0],loc0
 647        ldf.fill.nta f72=[ r3],loc0
 648        ldf.fill.nta f80=[r14],loc0
 649        ldf.fill.nta f88=[r15],loc0
 650        ;;
 651        ldf.fill.nta f96=[in0],loc1
 652        ldf.fill.nta f104=[ r3],loc1
 653        ldf.fill.nta f112=[r14],loc1
 654        ldf.fill.nta f120=[r15],loc1
 655        ;;
 656        ldf.fill.nta f33=[in0],loc0
 657        ldf.fill.nta f41=[ r3],loc0
 658        ldf.fill.nta f49=[r14],loc0
 659        ldf.fill.nta f57=[r15],loc0
 660        ;;
 661        ldf.fill.nta f65=[in0],loc0
 662        ldf.fill.nta f73=[ r3],loc0
 663        ldf.fill.nta f81=[r14],loc0
 664        ldf.fill.nta f89=[r15],loc0
 665        ;;
 666        ldf.fill.nta f97=[in0],loc1
 667        ldf.fill.nta f105=[ r3],loc1
 668        ldf.fill.nta f113=[r14],loc1
 669        ldf.fill.nta f121=[r15],loc1
 670        ;;
 671        ldf.fill.nta f34=[in0],loc0
 672        ldf.fill.nta f42=[ r3],loc0
 673        ldf.fill.nta f50=[r14],loc0
 674        ldf.fill.nta f58=[r15],loc0
 675        ;;
 676        ldf.fill.nta f66=[in0],loc0
 677        ldf.fill.nta f74=[ r3],loc0
 678        ldf.fill.nta f82=[r14],loc0
 679        ldf.fill.nta f90=[r15],loc0
 680        ;;
 681        ldf.fill.nta f98=[in0],loc1
 682        ldf.fill.nta f106=[ r3],loc1
 683        ldf.fill.nta f114=[r14],loc1
 684        ldf.fill.nta f122=[r15],loc1
 685        ;;
 686        ldf.fill.nta f35=[in0],loc0
 687        ldf.fill.nta f43=[ r3],loc0
 688        ldf.fill.nta f51=[r14],loc0
 689        ldf.fill.nta f59=[r15],loc0
 690        ;;
 691        ldf.fill.nta f67=[in0],loc0
 692        ldf.fill.nta f75=[ r3],loc0
 693        ldf.fill.nta f83=[r14],loc0
 694        ldf.fill.nta f91=[r15],loc0
 695        ;;
 696        ldf.fill.nta f99=[in0],loc1
 697        ldf.fill.nta f107=[ r3],loc1
 698        ldf.fill.nta f115=[r14],loc1
 699        ldf.fill.nta f123=[r15],loc1
 700        ;;
 701        ldf.fill.nta f36=[in0],loc0
 702        ldf.fill.nta f44=[ r3],loc0
 703        ldf.fill.nta f52=[r14],loc0
 704        ldf.fill.nta f60=[r15],loc0
 705        ;;
 706        ldf.fill.nta f68=[in0],loc0
 707        ldf.fill.nta f76=[ r3],loc0
 708        ldf.fill.nta f84=[r14],loc0
 709        ldf.fill.nta f92=[r15],loc0
 710        ;;
 711        ldf.fill.nta f100=[in0],loc1
 712        ldf.fill.nta f108=[ r3],loc1
 713        ldf.fill.nta f116=[r14],loc1
 714        ldf.fill.nta f124=[r15],loc1
 715        ;;
 716        ldf.fill.nta f37=[in0],loc0
 717        ldf.fill.nta f45=[ r3],loc0
 718        ldf.fill.nta f53=[r14],loc0
 719        ldf.fill.nta f61=[r15],loc0
 720        ;;
 721        ldf.fill.nta f69=[in0],loc0
 722        ldf.fill.nta f77=[ r3],loc0
 723        ldf.fill.nta f85=[r14],loc0
 724        ldf.fill.nta f93=[r15],loc0
 725        ;;
 726        ldf.fill.nta f101=[in0],loc1
 727        ldf.fill.nta f109=[ r3],loc1
 728        ldf.fill.nta f117=[r14],loc1
 729        ldf.fill.nta f125=[r15],loc1
 730        ;;
 731        ldf.fill.nta f38 =[in0],loc0
 732        ldf.fill.nta f46 =[ r3],loc0
 733        ldf.fill.nta f54 =[r14],loc0
 734        ldf.fill.nta f62 =[r15],loc0
 735        ;;
 736        ldf.fill.nta f70 =[in0],loc0
 737        ldf.fill.nta f78 =[ r3],loc0
 738        ldf.fill.nta f86 =[r14],loc0
 739        ldf.fill.nta f94 =[r15],loc0
 740        ;;
 741        ldf.fill.nta f102=[in0],loc1
 742        ldf.fill.nta f110=[ r3],loc1
 743        ldf.fill.nta f118=[r14],loc1
 744        ldf.fill.nta f126=[r15],loc1
 745        ;;
 746        ldf.fill.nta f39 =[in0],loc0
 747        ldf.fill.nta f47 =[ r3],loc0
 748        ldf.fill.nta f55 =[r14],loc0
 749        ldf.fill.nta f63 =[r15],loc0
 750        ;;
 751        ldf.fill.nta f71 =[in0],loc0
 752        ldf.fill.nta f79 =[ r3],loc0
 753        ldf.fill.nta f87 =[r14],loc0
 754        ldf.fill.nta f95 =[r15],loc0
 755        ;;
 756        ldf.fill.nta f103=[in0]
 757        ldf.fill.nta f111=[ r3]
 758        ldf.fill.nta f119=[r14]
 759        ldf.fill.nta f127=[r15]
 760        br.ret.sptk.many rp
 761END(__ia64_load_fpu)
 762
 763GLOBAL_ENTRY(__ia64_init_fpu)
 764        stf.spill [sp]=f0               // M3
 765        mov      f32=f0                 // F
 766        nop.b    0
 767
 768        ldfps    f33,f34=[sp]           // M0
 769        ldfps    f35,f36=[sp]           // M1
 770        mov      f37=f0                 // F
 771        ;;
 772
 773        setf.s   f38=r0                 // M2
 774        setf.s   f39=r0                 // M3
 775        mov      f40=f0                 // F
 776
 777        ldfps    f41,f42=[sp]           // M0
 778        ldfps    f43,f44=[sp]           // M1
 779        mov      f45=f0                 // F
 780
 781        setf.s   f46=r0                 // M2
 782        setf.s   f47=r0                 // M3
 783        mov      f48=f0                 // F
 784
 785        ldfps    f49,f50=[sp]           // M0
 786        ldfps    f51,f52=[sp]           // M1
 787        mov      f53=f0                 // F
 788
 789        setf.s   f54=r0                 // M2
 790        setf.s   f55=r0                 // M3
 791        mov      f56=f0                 // F
 792
 793        ldfps    f57,f58=[sp]           // M0
 794        ldfps    f59,f60=[sp]           // M1
 795        mov      f61=f0                 // F
 796
 797        setf.s   f62=r0                 // M2
 798        setf.s   f63=r0                 // M3
 799        mov      f64=f0                 // F
 800
 801        ldfps    f65,f66=[sp]           // M0
 802        ldfps    f67,f68=[sp]           // M1
 803        mov      f69=f0                 // F
 804
 805        setf.s   f70=r0                 // M2
 806        setf.s   f71=r0                 // M3
 807        mov      f72=f0                 // F
 808
 809        ldfps    f73,f74=[sp]           // M0
 810        ldfps    f75,f76=[sp]           // M1
 811        mov      f77=f0                 // F
 812
 813        setf.s   f78=r0                 // M2
 814        setf.s   f79=r0                 // M3
 815        mov      f80=f0                 // F
 816
 817        ldfps    f81,f82=[sp]           // M0
 818        ldfps    f83,f84=[sp]           // M1
 819        mov      f85=f0                 // F
 820
 821        setf.s   f86=r0                 // M2
 822        setf.s   f87=r0                 // M3
 823        mov      f88=f0                 // F
 824
 825        /*
 826         * When the instructions are cached, it would be faster to initialize
 827         * the remaining registers with simply mov instructions (F-unit).
 828         * This gets the time down to ~29 cycles.  However, this would use up
 829         * 33 bundles, whereas continuing with the above pattern yields
 830         * 10 bundles and ~30 cycles.
 831         */
 832
 833        ldfps    f89,f90=[sp]           // M0
 834        ldfps    f91,f92=[sp]           // M1
 835        mov      f93=f0                 // F
 836
 837        setf.s   f94=r0                 // M2
 838        setf.s   f95=r0                 // M3
 839        mov      f96=f0                 // F
 840
 841        ldfps    f97,f98=[sp]           // M0
 842        ldfps    f99,f100=[sp]          // M1
 843        mov      f101=f0                // F
 844
 845        setf.s   f102=r0                // M2
 846        setf.s   f103=r0                // M3
 847        mov      f104=f0                // F
 848
 849        ldfps    f105,f106=[sp]         // M0
 850        ldfps    f107,f108=[sp]         // M1
 851        mov      f109=f0                // F
 852
 853        setf.s   f110=r0                // M2
 854        setf.s   f111=r0                // M3
 855        mov      f112=f0                // F
 856
 857        ldfps    f113,f114=[sp]         // M0
 858        ldfps    f115,f116=[sp]         // M1
 859        mov      f117=f0                // F
 860
 861        setf.s   f118=r0                // M2
 862        setf.s   f119=r0                // M3
 863        mov      f120=f0                // F
 864
 865        ldfps    f121,f122=[sp]         // M0
 866        ldfps    f123,f124=[sp]         // M1
 867        mov      f125=f0                // F
 868
 869        setf.s   f126=r0                // M2
 870        setf.s   f127=r0                // M3
 871        br.ret.sptk.many rp             // F
 872END(__ia64_init_fpu)
 873
 874/*
 875 * Switch execution mode from virtual to physical
 876 *
 877 * Inputs:
 878 *      r16 = new psr to establish
 879 * Output:
 880 *      r19 = old virtual address of ar.bsp
 881 *      r20 = old virtual address of sp
 882 *
 883 * Note: RSE must already be in enforced lazy mode
 884 */
 885GLOBAL_ENTRY(ia64_switch_mode_phys)
 886 {
 887        rsm psr.i | psr.ic              // disable interrupts and interrupt collection
 888        mov r15=ip
 889 }
 890        ;;
 891 {
 892        flushrs                         // must be first insn in group
 893        srlz.i
 894 }
 895        ;;
 896        mov cr.ipsr=r16                 // set new PSR
 897        add r3=1f-ia64_switch_mode_phys,r15
 898
 899        mov r19=ar.bsp
 900        mov r20=sp
 901        mov r14=rp                      // get return address into a general register
 902        ;;
 903
 904        // going to physical mode, use tpa to translate virt->phys
 905        tpa r17=r19
 906        tpa r3=r3
 907        tpa sp=sp
 908        tpa r14=r14
 909        ;;
 910
 911        mov r18=ar.rnat                 // save ar.rnat
 912        mov ar.bspstore=r17             // this steps on ar.rnat
 913        mov cr.iip=r3
 914        mov cr.ifs=r0
 915        ;;
 916        mov ar.rnat=r18                 // restore ar.rnat
 917        rfi                             // must be last insn in group
 918        ;;
 9191:      mov rp=r14
 920        br.ret.sptk.many rp
 921END(ia64_switch_mode_phys)
 922
 923/*
 924 * Switch execution mode from physical to virtual
 925 *
 926 * Inputs:
 927 *      r16 = new psr to establish
 928 *      r19 = new bspstore to establish
 929 *      r20 = new sp to establish
 930 *
 931 * Note: RSE must already be in enforced lazy mode
 932 */
 933GLOBAL_ENTRY(ia64_switch_mode_virt)
 934 {
 935        rsm psr.i | psr.ic              // disable interrupts and interrupt collection
 936        mov r15=ip
 937 }
 938        ;;
 939 {
 940        flushrs                         // must be first insn in group
 941        srlz.i
 942 }
 943        ;;
 944        mov cr.ipsr=r16                 // set new PSR
 945        add r3=1f-ia64_switch_mode_virt,r15
 946
 947        mov r14=rp                      // get return address into a general register
 948        ;;
 949
 950        // going to virtual
 951        //   - for code addresses, set upper bits of addr to KERNEL_START
 952        //   - for stack addresses, copy from input argument
 953        movl r18=KERNEL_START
 954        dep r3=0,r3,KERNEL_TR_PAGE_SHIFT,64-KERNEL_TR_PAGE_SHIFT
 955        dep r14=0,r14,KERNEL_TR_PAGE_SHIFT,64-KERNEL_TR_PAGE_SHIFT
 956        mov sp=r20
 957        ;;
 958        or r3=r3,r18
 959        or r14=r14,r18
 960        ;;
 961
 962        mov r18=ar.rnat                 // save ar.rnat
 963        mov ar.bspstore=r19             // this steps on ar.rnat
 964        mov cr.iip=r3
 965        mov cr.ifs=r0
 966        ;;
 967        mov ar.rnat=r18                 // restore ar.rnat
 968        rfi                             // must be last insn in group
 969        ;;
 9701:      mov rp=r14
 971        br.ret.sptk.many rp
 972END(ia64_switch_mode_virt)
 973
 974GLOBAL_ENTRY(ia64_delay_loop)
 975        .prologue
 976{       nop 0                   // work around GAS unwind info generation bug...
 977        .save ar.lc,r2
 978        mov r2=ar.lc
 979        .body
 980        ;;
 981        mov ar.lc=r32
 982}
 983        ;;
 984        // force loop to be 32-byte aligned (GAS bug means we cannot use .align
 985        // inside function body without corrupting unwind info).
 986{       nop 0 }
 9871:      br.cloop.sptk.few 1b
 988        ;;
 989        mov ar.lc=r2
 990        br.ret.sptk.many rp
 991END(ia64_delay_loop)
 992
 993/*
 994 * Return a CPU-local timestamp in nano-seconds.  This timestamp is
 995 * NOT synchronized across CPUs its return value must never be
 996 * compared against the values returned on another CPU.  The usage in
 997 * kernel/sched/core.c ensures that.
 998 *
 999 * The return-value of sched_clock() is NOT supposed to wrap-around.
1000 * If it did, it would cause some scheduling hiccups (at the worst).

1001 * Fortunately, with a 64-bit cycle-counter ticking at 100GHz, even
1002 * that would happen only once every 5+ years.
1003 *
1004 * The code below basically calculates:
1005 *
1006 *   (ia64_get_itc() * local_cpu_data->nsec_per_cyc) >> IA64_NSEC_PER_CYC_SHIFT
1007 *
1008 * except that the multiplication and the shift are done with 128-bit
1009 * intermediate precision so that we can produce a full 64-bit result.
1010 */
1011GLOBAL_ENTRY(ia64_native_sched_clock)
1012        addl r8=THIS_CPU(ia64_cpu_info) + IA64_CPUINFO_NSEC_PER_CYC_OFFSET,r0
1013        mov.m r9=ar.itc         // fetch cycle-counter                          (35 cyc)
1014        ;;
1015        ldf8 f8=[r8]
1016        ;;
1017        setf.sig f9=r9          // certain to stall, so issue it _after_ ldf8...
1018        ;;
1019        xmpy.lu f10=f9,f8       // calculate low 64 bits of 128-bit product     (4 cyc)
1020        xmpy.hu f11=f9,f8       // calculate high 64 bits of 128-bit product
1021        ;;
1022        getf.sig r8=f10         //                                              (5 cyc)
1023        getf.sig r9=f11
1024        ;;
1025        shrp r8=r9,r8,IA64_NSEC_PER_CYC_SHIFT
1026        br.ret.sptk.many rp
1027END(ia64_native_sched_clock)
1028
1029#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
1030GLOBAL_ENTRY(cycle_to_nsec)
1031        alloc r16=ar.pfs,1,0,0,0
1032        addl r8=THIS_CPU(ia64_cpu_info) + IA64_CPUINFO_NSEC_PER_CYC_OFFSET,r0
1033        ;;
1034        ldf8 f8=[r8]
1035        ;;
1036        setf.sig f9=r32
1037        ;;
1038        xmpy.lu f10=f9,f8       // calculate low 64 bits of 128-bit product     (4 cyc)
1039        xmpy.hu f11=f9,f8       // calculate high 64 bits of 128-bit product
1040        ;;
1041        getf.sig r8=f10         //                                              (5 cyc)
1042        getf.sig r9=f11
1043        ;;
1044        shrp r8=r9,r8,IA64_NSEC_PER_CYC_SHIFT
1045        br.ret.sptk.many rp
1046END(cycle_to_nsec)
1047#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
1048
1049#ifdef CONFIG_IA64_BRL_EMU
1050
1051/*
1052 *  Assembly routines used by brl_emu.c to set preserved register state.
1053 */
1054
1055#define SET_REG(reg)                            \
1056 GLOBAL_ENTRY(ia64_set_##reg);                  \
1057        alloc r16=ar.pfs,1,0,0,0;               \
1058        mov reg=r32;                            \
1059        ;;                                      \
1060        br.ret.sptk.many rp;                    \
1061 END(ia64_set_##reg)
1062
1063SET_REG(b1);
1064SET_REG(b2);
1065SET_REG(b3);
1066SET_REG(b4);
1067SET_REG(b5);
1068
1069#endif /* CONFIG_IA64_BRL_EMU */
1070
1071#ifdef CONFIG_SMP
1072
1073#ifdef CONFIG_HOTPLUG_CPU
1074GLOBAL_ENTRY(ia64_jump_to_sal)
1075        alloc r16=ar.pfs,1,0,0,0;;
1076        rsm psr.i  | psr.ic
1077{
1078        flushrs
1079        srlz.i
1080}
1081        tpa r25=in0
1082        movl r18=tlb_purge_done;;
1083        DATA_VA_TO_PA(r18);;
1084        mov b1=r18      // Return location
1085        movl r18=ia64_do_tlb_purge;;
1086        DATA_VA_TO_PA(r18);;
1087        mov b2=r18      // doing tlb_flush work
1088        mov ar.rsc=0  // Put RSE  in enforced lazy, LE mode
1089        movl r17=1f;;
1090        DATA_VA_TO_PA(r17);;
1091        mov cr.iip=r17
1092        movl r16=SAL_PSR_BITS_TO_SET;;
1093        mov cr.ipsr=r16
1094        mov cr.ifs=r0;;
1095        rfi;;                   // note: this unmask MCA/INIT (psr.mc)
10961:
1097        /*
1098         * Invalidate all TLB data/inst
1099         */
1100        br.sptk.many b2;; // jump to tlb purge code
1101
1102tlb_purge_done:
1103        RESTORE_REGION_REGS(r25, r17,r18,r19);;
1104        RESTORE_REG(b0, r25, r17);;
1105        RESTORE_REG(b1, r25, r17);;
1106        RESTORE_REG(b2, r25, r17);;
1107        RESTORE_REG(b3, r25, r17);;
1108        RESTORE_REG(b4, r25, r17);;
1109        RESTORE_REG(b5, r25, r17);;
1110        ld8 r1=[r25],0x08;;
1111        ld8 r12=[r25],0x08;;
1112        ld8 r13=[r25],0x08;;
1113        RESTORE_REG(ar.fpsr, r25, r17);;
1114        RESTORE_REG(ar.pfs, r25, r17);;
1115        RESTORE_REG(ar.rnat, r25, r17);;
1116        RESTORE_REG(ar.unat, r25, r17);;
1117        RESTORE_REG(ar.bspstore, r25, r17);;
1118        RESTORE_REG(cr.dcr, r25, r17);;
1119        RESTORE_REG(cr.iva, r25, r17);;
1120        RESTORE_REG(cr.pta, r25, r17);;
1121        srlz.d;;        // required not to violate RAW dependency
1122        RESTORE_REG(cr.itv, r25, r17);;
1123        RESTORE_REG(cr.pmv, r25, r17);;
1124        RESTORE_REG(cr.cmcv, r25, r17);;
1125        RESTORE_REG(cr.lrr0, r25, r17);;
1126        RESTORE_REG(cr.lrr1, r25, r17);;
1127        ld8 r4=[r25],0x08;;
1128        ld8 r5=[r25],0x08;;
1129        ld8 r6=[r25],0x08;;
1130        ld8 r7=[r25],0x08;;
1131        ld8 r17=[r25],0x08;;
1132        mov pr=r17,-1;;
1133        RESTORE_REG(ar.lc, r25, r17);;
1134        /*
1135         * Now Restore floating point regs
1136         */
1137        ldf.fill.nta f2=[r25],16;;
1138        ldf.fill.nta f3=[r25],16;;
1139        ldf.fill.nta f4=[r25],16;;
1140        ldf.fill.nta f5=[r25],16;;
1141        ldf.fill.nta f16=[r25],16;;
1142        ldf.fill.nta f17=[r25],16;;
1143        ldf.fill.nta f18=[r25],16;;
1144        ldf.fill.nta f19=[r25],16;;
1145        ldf.fill.nta f20=[r25],16;;
1146        ldf.fill.nta f21=[r25],16;;
1147        ldf.fill.nta f22=[r25],16;;
1148        ldf.fill.nta f23=[r25],16;;
1149        ldf.fill.nta f24=[r25],16;;
1150        ldf.fill.nta f25=[r25],16;;
1151        ldf.fill.nta f26=[r25],16;;
1152        ldf.fill.nta f27=[r25],16;;
1153        ldf.fill.nta f28=[r25],16;;
1154        ldf.fill.nta f29=[r25],16;;
1155        ldf.fill.nta f30=[r25],16;;
1156        ldf.fill.nta f31=[r25],16;;
1157
1158        /*
1159         * Now that we have done all the register restores
1160         * we are now ready for the big DIVE to SAL Land
1161         */
1162        ssm psr.ic;;
1163        srlz.d;;
1164        br.ret.sptk.many b0;;
1165END(ia64_jump_to_sal)
1166#endif /* CONFIG_HOTPLUG_CPU */
1167
1168#endif /* CONFIG_SMP */
1169