18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * VISsave.S: Code for saving FPU register state for 48c2ecf20Sopenharmony_ci * VIS routines. One should not call this directly, 58c2ecf20Sopenharmony_ci * but use macros provided in <asm/visasm.h>. 68c2ecf20Sopenharmony_ci * 78c2ecf20Sopenharmony_ci * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz) 88c2ecf20Sopenharmony_ci */ 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ci#include <linux/linkage.h> 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ci#include <asm/asi.h> 138c2ecf20Sopenharmony_ci#include <asm/page.h> 148c2ecf20Sopenharmony_ci#include <asm/ptrace.h> 158c2ecf20Sopenharmony_ci#include <asm/visasm.h> 168c2ecf20Sopenharmony_ci#include <asm/thread_info.h> 178c2ecf20Sopenharmony_ci#include <asm/export.h> 188c2ecf20Sopenharmony_ci 198c2ecf20Sopenharmony_ci /* On entry: %o5=current FPRS value, %g7 is callers address */ 208c2ecf20Sopenharmony_ci /* May clobber %o5, %g1, %g2, %g3, %g7, %icc, %xcc */ 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ci /* Nothing special need be done here to handle pre-emption, this 238c2ecf20Sopenharmony_ci * FPU save/restore mechanism is already preemption safe. 248c2ecf20Sopenharmony_ci */ 258c2ecf20Sopenharmony_ci .text 268c2ecf20Sopenharmony_ci .align 32 278c2ecf20Sopenharmony_ciENTRY(VISenter) 288c2ecf20Sopenharmony_ci ldub [%g6 + TI_FPDEPTH], %g1 298c2ecf20Sopenharmony_ci brnz,a,pn %g1, 1f 308c2ecf20Sopenharmony_ci cmp %g1, 1 318c2ecf20Sopenharmony_ci stb %g0, [%g6 + TI_FPSAVED] 328c2ecf20Sopenharmony_ci stx %fsr, [%g6 + TI_XFSR] 338c2ecf20Sopenharmony_ci9: jmpl %g7 + %g0, %g0 348c2ecf20Sopenharmony_ci nop 358c2ecf20Sopenharmony_ci1: bne,pn %icc, 2f 368c2ecf20Sopenharmony_ci 378c2ecf20Sopenharmony_ci srl %g1, 1, %g1 388c2ecf20Sopenharmony_civis1: ldub [%g6 + TI_FPSAVED], %g3 398c2ecf20Sopenharmony_ci stx %fsr, [%g6 + TI_XFSR] 408c2ecf20Sopenharmony_ci or %g3, %o5, %g3 418c2ecf20Sopenharmony_ci stb %g3, [%g6 + TI_FPSAVED] 428c2ecf20Sopenharmony_ci rd %gsr, %g3 438c2ecf20Sopenharmony_ci clr %g1 448c2ecf20Sopenharmony_ci ba,pt %xcc, 3f 458c2ecf20Sopenharmony_ci 468c2ecf20Sopenharmony_ci stx %g3, [%g6 + TI_GSR] 478c2ecf20Sopenharmony_ci2: add %g6, %g1, %g3 488c2ecf20Sopenharmony_ci mov FPRS_DU | FPRS_DL | FPRS_FEF, %o5 498c2ecf20Sopenharmony_ci sll %g1, 3, %g1 508c2ecf20Sopenharmony_ci stb %o5, [%g3 + TI_FPSAVED] 518c2ecf20Sopenharmony_ci rd %gsr, %g2 528c2ecf20Sopenharmony_ci add %g6, %g1, %g3 538c2ecf20Sopenharmony_ci stx %g2, [%g3 + TI_GSR] 548c2ecf20Sopenharmony_ci 558c2ecf20Sopenharmony_ci add %g6, %g1, %g2 568c2ecf20Sopenharmony_ci stx %fsr, [%g2 + TI_XFSR] 578c2ecf20Sopenharmony_ci sll %g1, 5, %g1 588c2ecf20Sopenharmony_ci3: andcc %o5, FPRS_DL|FPRS_DU, %g0 598c2ecf20Sopenharmony_ci be,pn %icc, 9b 608c2ecf20Sopenharmony_ci add %g6, TI_FPREGS, %g2 618c2ecf20Sopenharmony_ci andcc %o5, FPRS_DL, %g0 628c2ecf20Sopenharmony_ci 638c2ecf20Sopenharmony_ci be,pn %icc, 4f 648c2ecf20Sopenharmony_ci add %g6, TI_FPREGS+0x40, %g3 658c2ecf20Sopenharmony_ci membar #Sync 668c2ecf20Sopenharmony_ci stda %f0, [%g2 + %g1] ASI_BLK_P 678c2ecf20Sopenharmony_ci stda %f16, [%g3 + %g1] ASI_BLK_P 688c2ecf20Sopenharmony_ci membar #Sync 698c2ecf20Sopenharmony_ci andcc %o5, FPRS_DU, %g0 708c2ecf20Sopenharmony_ci be,pn %icc, 5f 718c2ecf20Sopenharmony_ci4: add %g1, 128, %g1 728c2ecf20Sopenharmony_ci membar #Sync 738c2ecf20Sopenharmony_ci stda %f32, [%g2 + %g1] ASI_BLK_P 748c2ecf20Sopenharmony_ci 758c2ecf20Sopenharmony_ci stda %f48, [%g3 + %g1] ASI_BLK_P 768c2ecf20Sopenharmony_ci5: membar #Sync 778c2ecf20Sopenharmony_ci ba,pt %xcc, 80f 788c2ecf20Sopenharmony_ci nop 798c2ecf20Sopenharmony_ci 808c2ecf20Sopenharmony_ci .align 32 818c2ecf20Sopenharmony_ci80: jmpl %g7 + %g0, %g0 828c2ecf20Sopenharmony_ci nop 838c2ecf20Sopenharmony_ciENDPROC(VISenter) 848c2ecf20Sopenharmony_ciEXPORT_SYMBOL(VISenter) 85