diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/ia64/kernel/head.S | 1167 |
1 files changed, 0 insertions, 1167 deletions
diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S deleted file mode 100644 index 85c8a57da4..0000000000 --- a/arch/ia64/kernel/head.S +++ /dev/null @@ -1,1167 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Here is where the ball gets rolling as far as the kernel is concerned. - * When control is transferred to _start, the bootload has already - * loaded us to the correct address. All that's left to do here is - * to set up the kernel's global pointer and jump to the kernel - * entry point. - * - * Copyright (C) 1998-2001, 2003, 2005 Hewlett-Packard Co - * David Mosberger-Tang <davidm@hpl.hp.com> - * Stephane Eranian <eranian@hpl.hp.com> - * Copyright (C) 1999 VA Linux Systems - * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> - * Copyright (C) 1999 Intel Corp. - * Copyright (C) 1999 Asit Mallick <Asit.K.Mallick@intel.com> - * Copyright (C) 1999 Don Dugger <Don.Dugger@intel.com> - * Copyright (C) 2002 Fenghua Yu <fenghua.yu@intel.com> - * -Optimize __ia64_save_fpu() and __ia64_load_fpu() for Itanium 2. - * Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com> - * Support for CPU Hotplug - */ - -#include <linux/export.h> -#include <linux/pgtable.h> -#include <asm/asmmacro.h> -#include <asm/fpu.h> -#include <asm/kregs.h> -#include <asm/mmu_context.h> -#include <asm/asm-offsets.h> -#include <asm/pal.h> -#include <asm/processor.h> -#include <asm/ptrace.h> -#include <asm/mca_asm.h> -#include <linux/init.h> -#include <linux/linkage.h> - -#ifdef CONFIG_HOTPLUG_CPU -#define SAL_PSR_BITS_TO_SET \ - (IA64_PSR_AC | IA64_PSR_BN | IA64_PSR_MFH | IA64_PSR_MFL) - -#define SAVE_FROM_REG(src, ptr, dest) \ - mov dest=src;; \ - st8 [ptr]=dest,0x08 - -#define RESTORE_REG(reg, ptr, _tmp) \ - ld8 _tmp=[ptr],0x08;; \ - mov reg=_tmp - -#define SAVE_BREAK_REGS(ptr, _idx, _breg, _dest)\ - mov ar.lc=IA64_NUM_DBG_REGS-1;; \ - mov _idx=0;; \ -1: \ - SAVE_FROM_REG(_breg[_idx], ptr, _dest);; \ - add _idx=1,_idx;; \ - br.cloop.sptk.many 1b - -#define RESTORE_BREAK_REGS(ptr, _idx, _breg, _tmp, _lbl)\ - mov ar.lc=IA64_NUM_DBG_REGS-1;; \ - mov _idx=0;; \ -_lbl: RESTORE_REG(_breg[_idx], ptr, _tmp);; \ - add _idx=1, _idx;; \ - br.cloop.sptk.many _lbl - -#define SAVE_ONE_RR(num, _reg, _tmp) \ - movl _tmp=(num<<61);; \ - mov _reg=rr[_tmp] - -#define SAVE_REGION_REGS(_tmp, _r0, _r1, _r2, _r3, _r4, _r5, _r6, _r7) \ - SAVE_ONE_RR(0,_r0, _tmp);; \ - SAVE_ONE_RR(1,_r1, _tmp);; \ - SAVE_ONE_RR(2,_r2, _tmp);; \ - SAVE_ONE_RR(3,_r3, _tmp);; \ - SAVE_ONE_RR(4,_r4, _tmp);; \ - SAVE_ONE_RR(5,_r5, _tmp);; \ - SAVE_ONE_RR(6,_r6, _tmp);; \ - SAVE_ONE_RR(7,_r7, _tmp);; - -#define STORE_REGION_REGS(ptr, _r0, _r1, _r2, _r3, _r4, _r5, _r6, _r7) \ - st8 [ptr]=_r0, 8;; \ - st8 [ptr]=_r1, 8;; \ - st8 [ptr]=_r2, 8;; \ - st8 [ptr]=_r3, 8;; \ - st8 [ptr]=_r4, 8;; \ - st8 [ptr]=_r5, 8;; \ - st8 [ptr]=_r6, 8;; \ - st8 [ptr]=_r7, 8;; - -#define RESTORE_REGION_REGS(ptr, _idx1, _idx2, _tmp) \ - mov ar.lc=0x08-1;; \ - movl _idx1=0x00;; \ -RestRR: \ - dep.z _idx2=_idx1,61,3;; \ - ld8 _tmp=[ptr],8;; \ - mov rr[_idx2]=_tmp;; \ - srlz.d;; \ - add _idx1=1,_idx1;; \ - br.cloop.sptk.few RestRR - -#define SET_AREA_FOR_BOOTING_CPU(reg1, reg2) \ - movl reg1=sal_state_for_booting_cpu;; \ - ld8 reg2=[reg1];; - -/* - * Adjust region registers saved before starting to save - * break regs and rest of the states that need to be preserved. - */ -#define SAL_TO_OS_BOOT_HANDOFF_STATE_SAVE(_reg1,_reg2,_pred) \ - SAVE_FROM_REG(b0,_reg1,_reg2);; \ - SAVE_FROM_REG(b1,_reg1,_reg2);; \ - SAVE_FROM_REG(b2,_reg1,_reg2);; \ - SAVE_FROM_REG(b3,_reg1,_reg2);; \ - SAVE_FROM_REG(b4,_reg1,_reg2);; \ - SAVE_FROM_REG(b5,_reg1,_reg2);; \ - st8 [_reg1]=r1,0x08;; \ - st8 [_reg1]=r12,0x08;; \ - st8 [_reg1]=r13,0x08;; \ - SAVE_FROM_REG(ar.fpsr,_reg1,_reg2);; \ - SAVE_FROM_REG(ar.pfs,_reg1,_reg2);; \ - SAVE_FROM_REG(ar.rnat,_reg1,_reg2);; \ - SAVE_FROM_REG(ar.unat,_reg1,_reg2);; \ - SAVE_FROM_REG(ar.bspstore,_reg1,_reg2);; \ - SAVE_FROM_REG(cr.dcr,_reg1,_reg2);; \ - SAVE_FROM_REG(cr.iva,_reg1,_reg2);; \ - SAVE_FROM_REG(cr.pta,_reg1,_reg2);; \ - SAVE_FROM_REG(cr.itv,_reg1,_reg2);; \ - SAVE_FROM_REG(cr.pmv,_reg1,_reg2);; \ - SAVE_FROM_REG(cr.cmcv,_reg1,_reg2);; \ - SAVE_FROM_REG(cr.lrr0,_reg1,_reg2);; \ - SAVE_FROM_REG(cr.lrr1,_reg1,_reg2);; \ - st8 [_reg1]=r4,0x08;; \ - st8 [_reg1]=r5,0x08;; \ - st8 [_reg1]=r6,0x08;; \ - st8 [_reg1]=r7,0x08;; \ - st8 [_reg1]=_pred,0x08;; \ - SAVE_FROM_REG(ar.lc, _reg1, _reg2);; \ - stf.spill.nta [_reg1]=f2,16;; \ - stf.spill.nta [_reg1]=f3,16;; \ - stf.spill.nta [_reg1]=f4,16;; \ - stf.spill.nta [_reg1]=f5,16;; \ - stf.spill.nta [_reg1]=f16,16;; \ - stf.spill.nta [_reg1]=f17,16;; \ - stf.spill.nta [_reg1]=f18,16;; \ - stf.spill.nta [_reg1]=f19,16;; \ - stf.spill.nta [_reg1]=f20,16;; \ - stf.spill.nta [_reg1]=f21,16;; \ - stf.spill.nta [_reg1]=f22,16;; \ - stf.spill.nta [_reg1]=f23,16;; \ - stf.spill.nta [_reg1]=f24,16;; \ - stf.spill.nta [_reg1]=f25,16;; \ - stf.spill.nta [_reg1]=f26,16;; \ - stf.spill.nta [_reg1]=f27,16;; \ - stf.spill.nta [_reg1]=f28,16;; \ - stf.spill.nta [_reg1]=f29,16;; \ - stf.spill.nta [_reg1]=f30,16;; \ - stf.spill.nta [_reg1]=f31,16;; - -#else -#define SET_AREA_FOR_BOOTING_CPU(a1, a2) -#define SAL_TO_OS_BOOT_HANDOFF_STATE_SAVE(a1,a2, a3) -#define SAVE_REGION_REGS(_tmp, _r0, _r1, _r2, _r3, _r4, _r5, _r6, _r7) -#define STORE_REGION_REGS(ptr, _r0, _r1, _r2, _r3, _r4, _r5, _r6, _r7) -#endif - -#define SET_ONE_RR(num, pgsize, _tmp1, _tmp2, vhpt) \ - movl _tmp1=(num << 61);; \ - mov _tmp2=((ia64_rid(IA64_REGION_ID_KERNEL, (num<<61)) << 8) | (pgsize << 2) | vhpt);; \ - mov rr[_tmp1]=_tmp2 - - __PAGE_ALIGNED_DATA - - .global empty_zero_page -EXPORT_SYMBOL_GPL(empty_zero_page) -empty_zero_page: - .skip PAGE_SIZE - - .global swapper_pg_dir -swapper_pg_dir: - .skip PAGE_SIZE - - .rodata -halt_msg: - stringz "Halting kernel\n" - - __REF - - .global start_ap - - /* - * Start the kernel. When the bootloader passes control to _start(), r28 - * points to the address of the boot parameter area. Execution reaches - * here in physical mode. - */ -GLOBAL_ENTRY(_start) -start_ap: - .prologue - .save rp, r0 // terminate unwind chain with a NULL rp - .body - - rsm psr.i | psr.ic - ;; - srlz.i - ;; - { - flushrs // must be first insn in group - srlz.i - } - ;; - /* - * Save the region registers, predicate before they get clobbered - */ - SAVE_REGION_REGS(r2, r8,r9,r10,r11,r12,r13,r14,r15); - mov r25=pr;; - - /* - * Initialize kernel region registers: - * rr[0]: VHPT enabled, page size = PAGE_SHIFT - * rr[1]: VHPT enabled, page size = PAGE_SHIFT - * rr[2]: VHPT enabled, page size = PAGE_SHIFT - * rr[3]: VHPT enabled, page size = PAGE_SHIFT - * rr[4]: VHPT enabled, page size = PAGE_SHIFT - * rr[5]: VHPT enabled, page size = PAGE_SHIFT - * rr[6]: VHPT disabled, page size = IA64_GRANULE_SHIFT - * rr[7]: VHPT disabled, page size = IA64_GRANULE_SHIFT - * We initialize all of them to prevent inadvertently assuming - * something about the state of address translation early in boot. - */ - SET_ONE_RR(0, PAGE_SHIFT, r2, r16, 1);; - SET_ONE_RR(1, PAGE_SHIFT, r2, r16, 1);; - SET_ONE_RR(2, PAGE_SHIFT, r2, r16, 1);; - SET_ONE_RR(3, PAGE_SHIFT, r2, r16, 1);; - SET_ONE_RR(4, PAGE_SHIFT, r2, r16, 1);; - SET_ONE_RR(5, PAGE_SHIFT, r2, r16, 1);; - SET_ONE_RR(6, IA64_GRANULE_SHIFT, r2, r16, 0);; - SET_ONE_RR(7, IA64_GRANULE_SHIFT, r2, r16, 0);; - /* - * Now pin mappings into the TLB for kernel text and data - */ - mov r18=KERNEL_TR_PAGE_SHIFT<<2 - movl r17=KERNEL_START - ;; - mov cr.itir=r18 - mov cr.ifa=r17 - mov r16=IA64_TR_KERNEL - mov r3=ip - movl r18=PAGE_KERNEL - ;; - dep r2=0,r3,0,KERNEL_TR_PAGE_SHIFT - ;; - or r18=r2,r18 - ;; - srlz.i - ;; - itr.i itr[r16]=r18 - ;; - itr.d dtr[r16]=r18 - ;; - srlz.i - - /* - * Switch into virtual mode: - */ - movl r16=(IA64_PSR_IT|IA64_PSR_IC|IA64_PSR_DT|IA64_PSR_RT|IA64_PSR_DFH|IA64_PSR_BN \ - |IA64_PSR_DI) - ;; - mov cr.ipsr=r16 - movl r17=1f - ;; - mov cr.iip=r17 - mov cr.ifs=r0 - ;; - rfi - ;; -1: // now we are in virtual mode - - SET_AREA_FOR_BOOTING_CPU(r2, r16); - - STORE_REGION_REGS(r16, r8,r9,r10,r11,r12,r13,r14,r15); - SAL_TO_OS_BOOT_HANDOFF_STATE_SAVE(r16,r17,r25) - ;; - - // set IVT entry point---can't access I/O ports without it - movl r3=ia64_ivt - ;; - mov cr.iva=r3 - movl r2=FPSR_DEFAULT - ;; - srlz.i - movl gp=__gp - - mov ar.fpsr=r2 - ;; - -#define isAP p2 // are we an Application Processor? -#define isBP p3 // are we the Bootstrap Processor? - -#ifdef CONFIG_SMP - /* - * Find the init_task for the currently booting CPU. At poweron, and in - * UP mode, task_for_booting_cpu is NULL. - */ - movl r3=task_for_booting_cpu - ;; - ld8 r3=[r3] - movl r2=init_task - ;; - cmp.eq isBP,isAP=r3,r0 - ;; -(isAP) mov r2=r3 -#else - movl r2=init_task - cmp.eq isBP,isAP=r0,r0 -#endif - ;; - tpa r3=r2 // r3 == phys addr of task struct - mov r16=-1 -(isBP) br.cond.dpnt .load_current // BP stack is on region 5 --- no need to map it - - // load mapping for stack (virtaddr in r2, physaddr in r3) - rsm psr.ic - movl r17=PAGE_KERNEL - ;; - srlz.d - dep r18=0,r3,0,12 - ;; - or r18=r17,r18 - dep r2=-1,r3,61,3 // IMVA of task - ;; - mov r17=rr[r2] - shr.u r16=r3,IA64_GRANULE_SHIFT - ;; - dep r17=0,r17,8,24 - ;; - mov cr.itir=r17 - mov cr.ifa=r2 - - mov r19=IA64_TR_CURRENT_STACK - ;; - itr.d dtr[r19]=r18 - ;; - ssm psr.ic - srlz.d - ;; - -.load_current: - // load the "current" pointer (r13) and ar.k6 with the current task - mov IA64_KR(CURRENT)=r2 // virtual address - mov IA64_KR(CURRENT_STACK)=r16 - mov r13=r2 - /* - * Reserve space at the top of the stack for "struct pt_regs". Kernel - * threads don't store interesting values in that structure, but the space - * still needs to be there because time-critical stuff such as the context - * switching can be implemented more efficiently (for example, __switch_to() - * always sets the psr.dfh bit of the task it is switching to). - */ - - addl r12=IA64_STK_OFFSET-IA64_PT_REGS_SIZE-16,r2 - addl r2=IA64_RBS_OFFSET,r2 // initialize the RSE - mov ar.rsc=0 // place RSE in enforced lazy mode - ;; - loadrs // clear the dirty partition - movl r19=__phys_per_cpu_start - mov r18=PERCPU_PAGE_SIZE - ;; -#ifndef CONFIG_SMP - add r19=r19,r18 - ;; -#else -(isAP) br.few 2f - movl r20=__cpu0_per_cpu - ;; - shr.u r18=r18,3 -1: - ld8 r21=[r19],8;; - st8[r20]=r21,8 - adds r18=-1,r18;; - cmp4.lt p7,p6=0,r18 -(p7) br.cond.dptk.few 1b - mov r19=r20 - ;; -2: -#endif - tpa r19=r19 - ;; - .pred.rel.mutex isBP,isAP -(isBP) mov IA64_KR(PER_CPU_DATA)=r19 // per-CPU base for cpu0 -(isAP) mov IA64_KR(PER_CPU_DATA)=r0 // clear physical per-CPU base - ;; - mov ar.bspstore=r2 // establish the new RSE stack - ;; - mov ar.rsc=0x3 // place RSE in eager mode - -(isBP) dep r28=-1,r28,61,3 // make address virtual -(isBP) movl r2=ia64_boot_param - ;; -(isBP) st8 [r2]=r28 // save the address of the boot param area passed by the bootloader - -#ifdef CONFIG_SMP -(isAP) br.call.sptk.many rp=start_secondary -.ret0: -(isAP) br.cond.sptk self -#endif - - // This is executed by the bootstrap processor (bsp) only: - - br.call.sptk.many rp=start_kernel -.ret2: addl r3=@ltoff(halt_msg),gp - ;; - alloc r2=ar.pfs,8,0,2,0 - ;; - ld8 out0=[r3] - br.call.sptk.many b0=console_print - -self: hint @pause - br.sptk.many self // endless loop -END(_start) - - .text - -GLOBAL_ENTRY(ia64_save_debug_regs) - alloc r16=ar.pfs,1,0,0,0 - mov r20=ar.lc // preserve ar.lc - mov ar.lc=IA64_NUM_DBG_REGS-1 - mov r18=0 - add r19=IA64_NUM_DBG_REGS*8,in0 - ;; -1: mov r16=dbr[r18] -#ifdef CONFIG_ITANIUM - ;; - srlz.d -#endif - mov r17=ibr[r18] - add r18=1,r18 - ;; - st8.nta [in0]=r16,8 - st8.nta [r19]=r17,8 - br.cloop.sptk.many 1b - ;; - mov ar.lc=r20 // restore ar.lc - br.ret.sptk.many rp -END(ia64_save_debug_regs) - -GLOBAL_ENTRY(ia64_load_debug_regs) - alloc r16=ar.pfs,1,0,0,0 - lfetch.nta [in0] - mov r20=ar.lc // preserve ar.lc - add r19=IA64_NUM_DBG_REGS*8,in0 - mov ar.lc=IA64_NUM_DBG_REGS-1 - mov r18=-1 - ;; -1: ld8.nta r16=[in0],8 - ld8.nta r17=[r19],8 - add r18=1,r18 - ;; - mov dbr[r18]=r16 -#ifdef CONFIG_ITANIUM - ;; - srlz.d // Errata 132 (NoFix status) -#endif - mov ibr[r18]=r17 - br.cloop.sptk.many 1b - ;; - mov ar.lc=r20 // restore ar.lc - br.ret.sptk.many rp -END(ia64_load_debug_regs) - -GLOBAL_ENTRY(__ia64_save_fpu) - alloc r2=ar.pfs,1,4,0,0 - adds loc0=96*16-16,in0 - adds loc1=96*16-16-128,in0 - ;; - stf.spill.nta [loc0]=f127,-256 - stf.spill.nta [loc1]=f119,-256 - ;; - stf.spill.nta [loc0]=f111,-256 - stf.spill.nta [loc1]=f103,-256 - ;; - stf.spill.nta [loc0]=f95,-256 - stf.spill.nta [loc1]=f87,-256 - ;; - stf.spill.nta [loc0]=f79,-256 - stf.spill.nta [loc1]=f71,-256 - ;; - stf.spill.nta [loc0]=f63,-256 - stf.spill.nta [loc1]=f55,-256 - adds loc2=96*16-32,in0 - ;; - stf.spill.nta [loc0]=f47,-256 - stf.spill.nta [loc1]=f39,-256 - adds loc3=96*16-32-128,in0 - ;; - stf.spill.nta [loc2]=f126,-256 - stf.spill.nta [loc3]=f118,-256 - ;; - stf.spill.nta [loc2]=f110,-256 - stf.spill.nta [loc3]=f102,-256 - ;; - stf.spill.nta [loc2]=f94,-256 - stf.spill.nta [loc3]=f86,-256 - ;; - stf.spill.nta [loc2]=f78,-256 - stf.spill.nta [loc3]=f70,-256 - ;; - stf.spill.nta [loc2]=f62,-256 - stf.spill.nta [loc3]=f54,-256 - adds loc0=96*16-48,in0 - ;; - stf.spill.nta [loc2]=f46,-256 - stf.spill.nta [loc3]=f38,-256 - adds loc1=96*16-48-128,in0 - ;; - stf.spill.nta [loc0]=f125,-256 - stf.spill.nta [loc1]=f117,-256 - ;; - stf.spill.nta [loc0]=f109,-256 - stf.spill.nta [loc1]=f101,-256 - ;; - stf.spill.nta [loc0]=f93,-256 - stf.spill.nta [loc1]=f85,-256 - ;; - stf.spill.nta [loc0]=f77,-256 - stf.spill.nta [loc1]=f69,-256 - ;; - stf.spill.nta [loc0]=f61,-256 - stf.spill.nta [loc1]=f53,-256 - adds loc2=96*16-64,in0 - ;; - stf.spill.nta [loc0]=f45,-256 - stf.spill.nta [loc1]=f37,-256 - adds loc3=96*16-64-128,in0 - ;; - stf.spill.nta [loc2]=f124,-256 - stf.spill.nta [loc3]=f116,-256 - ;; - stf.spill.nta [loc2]=f108,-256 - stf.spill.nta [loc3]=f100,-256 - ;; - stf.spill.nta [loc2]=f92,-256 - stf.spill.nta [loc3]=f84,-256 - ;; - stf.spill.nta [loc2]=f76,-256 - stf.spill.nta [loc3]=f68,-256 - ;; - stf.spill.nta [loc2]=f60,-256 - stf.spill.nta [loc3]=f52,-256 - adds loc0=96*16-80,in0 - ;; - stf.spill.nta [loc2]=f44,-256 - stf.spill.nta [loc3]=f36,-256 - adds loc1=96*16-80-128,in0 - ;; - stf.spill.nta [loc0]=f123,-256 - stf.spill.nta [loc1]=f115,-256 - ;; - stf.spill.nta [loc0]=f107,-256 - stf.spill.nta [loc1]=f99,-256 - ;; - stf.spill.nta [loc0]=f91,-256 - stf.spill.nta [loc1]=f83,-256 - ;; - stf.spill.nta [loc0]=f75,-256 - stf.spill.nta [loc1]=f67,-256 - ;; - stf.spill.nta [loc0]=f59,-256 - stf.spill.nta [loc1]=f51,-256 - adds loc2=96*16-96,in0 - ;; - stf.spill.nta [loc0]=f43,-256 - stf.spill.nta [loc1]=f35,-256 - adds loc3=96*16-96-128,in0 - ;; - stf.spill.nta [loc2]=f122,-256 - stf.spill.nta [loc3]=f114,-256 - ;; - stf.spill.nta [loc2]=f106,-256 - stf.spill.nta [loc3]=f98,-256 - ;; - stf.spill.nta [loc2]=f90,-256 - stf.spill.nta [loc3]=f82,-256 - ;; - stf.spill.nta [loc2]=f74,-256 - stf.spill.nta [loc3]=f66,-256 - ;; - stf.spill.nta [loc2]=f58,-256 - stf.spill.nta [loc3]=f50,-256 - adds loc0=96*16-112,in0 - ;; - stf.spill.nta [loc2]=f42,-256 - stf.spill.nta [loc3]=f34,-256 - adds loc1=96*16-112-128,in0 - ;; - stf.spill.nta [loc0]=f121,-256 - stf.spill.nta [loc1]=f113,-256 - ;; - stf.spill.nta [loc0]=f105,-256 - stf.spill.nta [loc1]=f97,-256 - ;; - stf.spill.nta [loc0]=f89,-256 - stf.spill.nta [loc1]=f81,-256 - ;; - stf.spill.nta [loc0]=f73,-256 - stf.spill.nta [loc1]=f65,-256 - ;; - stf.spill.nta [loc0]=f57,-256 - stf.spill.nta [loc1]=f49,-256 - adds loc2=96*16-128,in0 - ;; - stf.spill.nta [loc0]=f41,-256 - stf.spill.nta [loc1]=f33,-256 - adds loc3=96*16-128-128,in0 - ;; - stf.spill.nta [loc2]=f120,-256 - stf.spill.nta [loc3]=f112,-256 - ;; - stf.spill.nta [loc2]=f104,-256 - stf.spill.nta [loc3]=f96,-256 - ;; - stf.spill.nta [loc2]=f88,-256 - stf.spill.nta [loc3]=f80,-256 - ;; - stf.spill.nta [loc2]=f72,-256 - stf.spill.nta [loc3]=f64,-256 - ;; - stf.spill.nta [loc2]=f56,-256 - stf.spill.nta [loc3]=f48,-256 - ;; - stf.spill.nta [loc2]=f40 - stf.spill.nta [loc3]=f32 - br.ret.sptk.many rp -END(__ia64_save_fpu) - -GLOBAL_ENTRY(__ia64_load_fpu) - alloc r2=ar.pfs,1,2,0,0 - adds r3=128,in0 - adds r14=256,in0 - adds r15=384,in0 - mov loc0=512 - mov loc1=-1024+16 - ;; - ldf.fill.nta f32=[in0],loc0 - ldf.fill.nta f40=[ r3],loc0 - ldf.fill.nta f48=[r14],loc0 - ldf.fill.nta f56=[r15],loc0 - ;; - ldf.fill.nta f64=[in0],loc0 - ldf.fill.nta f72=[ r3],loc0 - ldf.fill.nta f80=[r14],loc0 - ldf.fill.nta f88=[r15],loc0 - ;; - ldf.fill.nta f96=[in0],loc1 - ldf.fill.nta f104=[ r3],loc1 - ldf.fill.nta f112=[r14],loc1 - ldf.fill.nta f120=[r15],loc1 - ;; - ldf.fill.nta f33=[in0],loc0 - ldf.fill.nta f41=[ r3],loc0 - ldf.fill.nta f49=[r14],loc0 - ldf.fill.nta f57=[r15],loc0 - ;; - ldf.fill.nta f65=[in0],loc0 - ldf.fill.nta f73=[ r3],loc0 - ldf.fill.nta f81=[r14],loc0 - ldf.fill.nta f89=[r15],loc0 - ;; - ldf.fill.nta f97=[in0],loc1 - ldf.fill.nta f105=[ r3],loc1 - ldf.fill.nta f113=[r14],loc1 - ldf.fill.nta f121=[r15],loc1 - ;; - ldf.fill.nta f34=[in0],loc0 - ldf.fill.nta f42=[ r3],loc0 - ldf.fill.nta f50=[r14],loc0 - ldf.fill.nta f58=[r15],loc0 - ;; - ldf.fill.nta f66=[in0],loc0 - ldf.fill.nta f74=[ r3],loc0 - ldf.fill.nta f82=[r14],loc0 - ldf.fill.nta f90=[r15],loc0 - ;; - ldf.fill.nta f98=[in0],loc1 - ldf.fill.nta f106=[ r3],loc1 - ldf.fill.nta f114=[r14],loc1 - ldf.fill.nta f122=[r15],loc1 - ;; - ldf.fill.nta f35=[in0],loc0 - ldf.fill.nta f43=[ r3],loc0 - ldf.fill.nta f51=[r14],loc0 - ldf.fill.nta f59=[r15],loc0 - ;; - ldf.fill.nta f67=[in0],loc0 - ldf.fill.nta f75=[ r3],loc0 - ldf.fill.nta f83=[r14],loc0 - ldf.fill.nta f91=[r15],loc0 - ;; - ldf.fill.nta f99=[in0],loc1 - ldf.fill.nta f107=[ r3],loc1 - ldf.fill.nta f115=[r14],loc1 - ldf.fill.nta f123=[r15],loc1 - ;; - ldf.fill.nta f36=[in0],loc0 - ldf.fill.nta f44=[ r3],loc0 - ldf.fill.nta f52=[r14],loc0 - ldf.fill.nta f60=[r15],loc0 - ;; - ldf.fill.nta f68=[in0],loc0 - ldf.fill.nta f76=[ r3],loc0 - ldf.fill.nta f84=[r14],loc0 - ldf.fill.nta f92=[r15],loc0 - ;; - ldf.fill.nta f100=[in0],loc1 - ldf.fill.nta f108=[ r3],loc1 - ldf.fill.nta f116=[r14],loc1 - ldf.fill.nta f124=[r15],loc1 - ;; - ldf.fill.nta f37=[in0],loc0 - ldf.fill.nta f45=[ r3],loc0 - ldf.fill.nta f53=[r14],loc0 - ldf.fill.nta f61=[r15],loc0 - ;; - ldf.fill.nta f69=[in0],loc0 - ldf.fill.nta f77=[ r3],loc0 - ldf.fill.nta f85=[r14],loc0 - ldf.fill.nta f93=[r15],loc0 - ;; - ldf.fill.nta f101=[in0],loc1 - ldf.fill.nta f109=[ r3],loc1 - ldf.fill.nta f117=[r14],loc1 - ldf.fill.nta f125=[r15],loc1 - ;; - ldf.fill.nta f38 =[in0],loc0 - ldf.fill.nta f46 =[ r3],loc0 - ldf.fill.nta f54 =[r14],loc0 - ldf.fill.nta f62 =[r15],loc0 - ;; - ldf.fill.nta f70 =[in0],loc0 - ldf.fill.nta f78 =[ r3],loc0 - ldf.fill.nta f86 =[r14],loc0 - ldf.fill.nta f94 =[r15],loc0 - ;; - ldf.fill.nta f102=[in0],loc1 - ldf.fill.nta f110=[ r3],loc1 - ldf.fill.nta f118=[r14],loc1 - ldf.fill.nta f126=[r15],loc1 - ;; - ldf.fill.nta f39 =[in0],loc0 - ldf.fill.nta f47 =[ r3],loc0 - ldf.fill.nta f55 =[r14],loc0 - ldf.fill.nta f63 =[r15],loc0 - ;; - ldf.fill.nta f71 =[in0],loc0 - ldf.fill.nta f79 =[ r3],loc0 - ldf.fill.nta f87 =[r14],loc0 - ldf.fill.nta f95 =[r15],loc0 - ;; - ldf.fill.nta f103=[in0] - ldf.fill.nta f111=[ r3] - ldf.fill.nta f119=[r14] - ldf.fill.nta f127=[r15] - br.ret.sptk.many rp -END(__ia64_load_fpu) - -GLOBAL_ENTRY(__ia64_init_fpu) - stf.spill [sp]=f0 // M3 - mov f32=f0 // F - nop.b 0 - - ldfps f33,f34=[sp] // M0 - ldfps f35,f36=[sp] // M1 - mov f37=f0 // F - ;; - - setf.s f38=r0 // M2 - setf.s f39=r0 // M3 - mov f40=f0 // F - - ldfps f41,f42=[sp] // M0 - ldfps f43,f44=[sp] // M1 - mov f45=f0 // F - - setf.s f46=r0 // M2 - setf.s f47=r0 // M3 - mov f48=f0 // F - - ldfps f49,f50=[sp] // M0 - ldfps f51,f52=[sp] // M1 - mov f53=f0 // F - - setf.s f54=r0 // M2 - setf.s f55=r0 // M3 - mov f56=f0 // F - - ldfps f57,f58=[sp] // M0 - ldfps f59,f60=[sp] // M1 - mov f61=f0 // F - - setf.s f62=r0 // M2 - setf.s f63=r0 // M3 - mov f64=f0 // F - - ldfps f65,f66=[sp] // M0 - ldfps f67,f68=[sp] // M1 - mov f69=f0 // F - - setf.s f70=r0 // M2 - setf.s f71=r0 // M3 - mov f72=f0 // F - - ldfps f73,f74=[sp] // M0 - ldfps f75,f76=[sp] // M1 - mov f77=f0 // F - - setf.s f78=r0 // M2 - setf.s f79=r0 // M3 - mov f80=f0 // F - - ldfps f81,f82=[sp] // M0 - ldfps f83,f84=[sp] // M1 - mov f85=f0 // F - - setf.s f86=r0 // M2 - setf.s f87=r0 // M3 - mov f88=f0 // F - - /* - * When the instructions are cached, it would be faster to initialize - * the remaining registers with simply mov instructions (F-unit). - * This gets the time down to ~29 cycles. However, this would use up - * 33 bundles, whereas continuing with the above pattern yields - * 10 bundles and ~30 cycles. - */ - - ldfps f89,f90=[sp] // M0 - ldfps f91,f92=[sp] // M1 - mov f93=f0 // F - - setf.s f94=r0 // M2 - setf.s f95=r0 // M3 - mov f96=f0 // F - - ldfps f97,f98=[sp] // M0 - ldfps f99,f100=[sp] // M1 - mov f101=f0 // F - - setf.s f102=r0 // M2 - setf.s f103=r0 // M3 - mov f104=f0 // F - - ldfps f105,f106=[sp] // M0 - ldfps f107,f108=[sp] // M1 - mov f109=f0 // F - - setf.s f110=r0 // M2 - setf.s f111=r0 // M3 - mov f112=f0 // F - - ldfps f113,f114=[sp] // M0 - ldfps f115,f116=[sp] // M1 - mov f117=f0 // F - - setf.s f118=r0 // M2 - setf.s f119=r0 // M3 - mov f120=f0 // F - - ldfps f121,f122=[sp] // M0 - ldfps f123,f124=[sp] // M1 - mov f125=f0 // F - - setf.s f126=r0 // M2 - setf.s f127=r0 // M3 - br.ret.sptk.many rp // F -END(__ia64_init_fpu) - -/* - * Switch execution mode from virtual to physical - * - * Inputs: - * r16 = new psr to establish - * Output: - * r19 = old virtual address of ar.bsp - * r20 = old virtual address of sp - * - * Note: RSE must already be in enforced lazy mode - */ -GLOBAL_ENTRY(ia64_switch_mode_phys) - { - rsm psr.i | psr.ic // disable interrupts and interrupt collection - mov r15=ip - } - ;; - { - flushrs // must be first insn in group - srlz.i - } - ;; - mov cr.ipsr=r16 // set new PSR - add r3=1f-ia64_switch_mode_phys,r15 - - mov r19=ar.bsp - mov r20=sp - mov r14=rp // get return address into a general register - ;; - - // going to physical mode, use tpa to translate virt->phys - tpa r17=r19 - tpa r3=r3 - tpa sp=sp - tpa r14=r14 - ;; - - mov r18=ar.rnat // save ar.rnat - mov ar.bspstore=r17 // this steps on ar.rnat - mov cr.iip=r3 - mov cr.ifs=r0 - ;; - mov ar.rnat=r18 // restore ar.rnat - rfi // must be last insn in group - ;; -1: mov rp=r14 - br.ret.sptk.many rp -END(ia64_switch_mode_phys) - -/* - * Switch execution mode from physical to virtual - * - * Inputs: - * r16 = new psr to establish - * r19 = new bspstore to establish - * r20 = new sp to establish - * - * Note: RSE must already be in enforced lazy mode - */ -GLOBAL_ENTRY(ia64_switch_mode_virt) - { - rsm psr.i | psr.ic // disable interrupts and interrupt collection - mov r15=ip - } - ;; - { - flushrs // must be first insn in group - srlz.i - } - ;; - mov cr.ipsr=r16 // set new PSR - add r3=1f-ia64_switch_mode_virt,r15 - - mov r14=rp // get return address into a general register - ;; - - // going to virtual - // - for code addresses, set upper bits of addr to KERNEL_START - // - for stack addresses, copy from input argument - movl r18=KERNEL_START - dep r3=0,r3,KERNEL_TR_PAGE_SHIFT,64-KERNEL_TR_PAGE_SHIFT - dep r14=0,r14,KERNEL_TR_PAGE_SHIFT,64-KERNEL_TR_PAGE_SHIFT - mov sp=r20 - ;; - or r3=r3,r18 - or r14=r14,r18 - ;; - - mov r18=ar.rnat // save ar.rnat - mov ar.bspstore=r19 // this steps on ar.rnat - mov cr.iip=r3 - mov cr.ifs=r0 - ;; - mov ar.rnat=r18 // restore ar.rnat - rfi // must be last insn in group - ;; -1: mov rp=r14 - br.ret.sptk.many rp -END(ia64_switch_mode_virt) - -GLOBAL_ENTRY(ia64_delay_loop) - .prologue -{ nop 0 // work around GAS unwind info generation bug... - .save ar.lc,r2 - mov r2=ar.lc - .body - ;; - mov ar.lc=r32 -} - ;; - // force loop to be 32-byte aligned (GAS bug means we cannot use .align - // inside function body without corrupting unwind info). -{ nop 0 } -1: br.cloop.sptk.few 1b - ;; - mov ar.lc=r2 - br.ret.sptk.many rp -END(ia64_delay_loop) - -/* - * Return a CPU-local timestamp in nano-seconds. This timestamp is - * NOT synchronized across CPUs its return value must never be - * compared against the values returned on another CPU. The usage in - * kernel/sched/core.c ensures that. - * - * The return-value of sched_clock() is NOT supposed to wrap-around. - * If it did, it would cause some scheduling hiccups (at the worst). - * Fortunately, with a 64-bit cycle-counter ticking at 100GHz, even - * that would happen only once every 5+ years. - * - * The code below basically calculates: - * - * (ia64_get_itc() * local_cpu_data->nsec_per_cyc) >> IA64_NSEC_PER_CYC_SHIFT - * - * except that the multiplication and the shift are done with 128-bit - * intermediate precision so that we can produce a full 64-bit result. - */ -GLOBAL_ENTRY(ia64_native_sched_clock) - addl r8=THIS_CPU(ia64_cpu_info) + IA64_CPUINFO_NSEC_PER_CYC_OFFSET,r0 - mov.m r9=ar.itc // fetch cycle-counter (35 cyc) - ;; - ldf8 f8=[r8] - ;; - setf.sig f9=r9 // certain to stall, so issue it _after_ ldf8... - ;; - xmpy.lu f10=f9,f8 // calculate low 64 bits of 128-bit product (4 cyc) - xmpy.hu f11=f9,f8 // calculate high 64 bits of 128-bit product - ;; - getf.sig r8=f10 // (5 cyc) - getf.sig r9=f11 - ;; - shrp r8=r9,r8,IA64_NSEC_PER_CYC_SHIFT - br.ret.sptk.many rp -END(ia64_native_sched_clock) - -#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE -GLOBAL_ENTRY(cycle_to_nsec) - alloc r16=ar.pfs,1,0,0,0 - addl r8=THIS_CPU(ia64_cpu_info) + IA64_CPUINFO_NSEC_PER_CYC_OFFSET,r0 - ;; - ldf8 f8=[r8] - ;; - setf.sig f9=r32 - ;; - xmpy.lu f10=f9,f8 // calculate low 64 bits of 128-bit product (4 cyc) - xmpy.hu f11=f9,f8 // calculate high 64 bits of 128-bit product - ;; - getf.sig r8=f10 // (5 cyc) - getf.sig r9=f11 - ;; - shrp r8=r9,r8,IA64_NSEC_PER_CYC_SHIFT - br.ret.sptk.many rp -END(cycle_to_nsec) -#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ - -#ifdef CONFIG_IA64_BRL_EMU - -/* - * Assembly routines used by brl_emu.c to set preserved register state. - */ - -#define SET_REG(reg) \ - GLOBAL_ENTRY(ia64_set_##reg); \ - alloc r16=ar.pfs,1,0,0,0; \ - mov reg=r32; \ - ;; \ - br.ret.sptk.many rp; \ - END(ia64_set_##reg) - -SET_REG(b1); -SET_REG(b2); -SET_REG(b3); -SET_REG(b4); -SET_REG(b5); - -#endif /* CONFIG_IA64_BRL_EMU */ - -#ifdef CONFIG_SMP - -#ifdef CONFIG_HOTPLUG_CPU -GLOBAL_ENTRY(ia64_jump_to_sal) - alloc r16=ar.pfs,1,0,0,0;; - rsm psr.i | psr.ic -{ - flushrs - srlz.i -} - tpa r25=in0 - movl r18=tlb_purge_done;; - DATA_VA_TO_PA(r18);; - mov b1=r18 // Return location - movl r18=ia64_do_tlb_purge;; - DATA_VA_TO_PA(r18);; - mov b2=r18 // doing tlb_flush work - mov ar.rsc=0 // Put RSE in enforced lazy, LE mode - movl r17=1f;; - DATA_VA_TO_PA(r17);; - mov cr.iip=r17 - movl r16=SAL_PSR_BITS_TO_SET;; - mov cr.ipsr=r16 - mov cr.ifs=r0;; - rfi;; // note: this unmask MCA/INIT (psr.mc) -1: - /* - * Invalidate all TLB data/inst - */ - br.sptk.many b2;; // jump to tlb purge code - -tlb_purge_done: - RESTORE_REGION_REGS(r25, r17,r18,r19);; - RESTORE_REG(b0, r25, r17);; - RESTORE_REG(b1, r25, r17);; - RESTORE_REG(b2, r25, r17);; - RESTORE_REG(b3, r25, r17);; - RESTORE_REG(b4, r25, r17);; - RESTORE_REG(b5, r25, r17);; - ld8 r1=[r25],0x08;; - ld8 r12=[r25],0x08;; - ld8 r13=[r25],0x08;; - RESTORE_REG(ar.fpsr, r25, r17);; - RESTORE_REG(ar.pfs, r25, r17);; - RESTORE_REG(ar.rnat, r25, r17);; - RESTORE_REG(ar.unat, r25, r17);; - RESTORE_REG(ar.bspstore, r25, r17);; - RESTORE_REG(cr.dcr, r25, r17);; - RESTORE_REG(cr.iva, r25, r17);; - RESTORE_REG(cr.pta, r25, r17);; - srlz.d;; // required not to violate RAW dependency - RESTORE_REG(cr.itv, r25, r17);; - RESTORE_REG(cr.pmv, r25, r17);; - RESTORE_REG(cr.cmcv, r25, r17);; - RESTORE_REG(cr.lrr0, r25, r17);; - RESTORE_REG(cr.lrr1, r25, r17);; - ld8 r4=[r25],0x08;; - ld8 r5=[r25],0x08;; - ld8 r6=[r25],0x08;; - ld8 r7=[r25],0x08;; - ld8 r17=[r25],0x08;; - mov pr=r17,-1;; - RESTORE_REG(ar.lc, r25, r17);; - /* - * Now Restore floating point regs - */ - ldf.fill.nta f2=[r25],16;; - ldf.fill.nta f3=[r25],16;; - ldf.fill.nta f4=[r25],16;; - ldf.fill.nta f5=[r25],16;; - ldf.fill.nta f16=[r25],16;; - ldf.fill.nta f17=[r25],16;; - ldf.fill.nta f18=[r25],16;; - ldf.fill.nta f19=[r25],16;; - ldf.fill.nta f20=[r25],16;; - ldf.fill.nta f21=[r25],16;; - ldf.fill.nta f22=[r25],16;; - ldf.fill.nta f23=[r25],16;; - ldf.fill.nta f24=[r25],16;; - ldf.fill.nta f25=[r25],16;; - ldf.fill.nta f26=[r25],16;; - ldf.fill.nta f27=[r25],16;; - ldf.fill.nta f28=[r25],16;; - ldf.fill.nta f29=[r25],16;; - ldf.fill.nta f30=[r25],16;; - ldf.fill.nta f31=[r25],16;; - - /* - * Now that we have done all the register restores - * we are now ready for the big DIVE to SAL Land - */ - ssm psr.ic;; - srlz.d;; - br.ret.sptk.many b0;; -END(ia64_jump_to_sal) -#endif /* CONFIG_HOTPLUG_CPU */ - -#endif /* CONFIG_SMP */ |