18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-or-later */ 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * Copyright 2015, Cyril Bur, IBM Corp. 48c2ecf20Sopenharmony_ci */ 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_ci#include "basic_asm.h" 78c2ecf20Sopenharmony_ci#include "gpr_asm.h" 88c2ecf20Sopenharmony_ci#include "fpu_asm.h" 98c2ecf20Sopenharmony_ci#include "vmx_asm.h" 108c2ecf20Sopenharmony_ci#include "vsx_asm.h" 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ci/* 138c2ecf20Sopenharmony_ci * Large caveat here being that the caller cannot expect the 148c2ecf20Sopenharmony_ci * signal to always be sent! The hardware can (AND WILL!) abort 158c2ecf20Sopenharmony_ci * the transaction between the tbegin and the tsuspend (however 168c2ecf20Sopenharmony_ci * unlikely it seems or infrequently it actually happens). 178c2ecf20Sopenharmony_ci * You have been warned. 188c2ecf20Sopenharmony_ci */ 198c2ecf20Sopenharmony_ci/* long tm_signal_self(pid_t pid, long *gprs, double *fps, vector *vms, vector *vss); */ 208c2ecf20Sopenharmony_ciFUNC_START(tm_signal_self_context_load) 218c2ecf20Sopenharmony_ci PUSH_BASIC_STACK(512) 228c2ecf20Sopenharmony_ci /* 238c2ecf20Sopenharmony_ci * Don't strictly need to save and restore as it depends on if 248c2ecf20Sopenharmony_ci * we're going to use them, however this reduces messy logic 258c2ecf20Sopenharmony_ci */ 268c2ecf20Sopenharmony_ci PUSH_VMX(STACK_FRAME_LOCAL(5,0),r8) 278c2ecf20Sopenharmony_ci PUSH_FPU(512) 288c2ecf20Sopenharmony_ci PUSH_NVREGS_BELOW_FPU(512) 298c2ecf20Sopenharmony_ci std r3, STACK_FRAME_PARAM(0)(sp) /* pid */ 308c2ecf20Sopenharmony_ci std r4, STACK_FRAME_PARAM(1)(sp) /* gps */ 318c2ecf20Sopenharmony_ci std r5, STACK_FRAME_PARAM(2)(sp) /* fps */ 328c2ecf20Sopenharmony_ci std r6, STACK_FRAME_PARAM(3)(sp) /* vms */ 338c2ecf20Sopenharmony_ci std r7, STACK_FRAME_PARAM(4)(sp) /* vss */ 348c2ecf20Sopenharmony_ci 358c2ecf20Sopenharmony_ci ld r3, STACK_FRAME_PARAM(1)(sp) 368c2ecf20Sopenharmony_ci cmpdi r3, 0 378c2ecf20Sopenharmony_ci beq skip_gpr_lc 388c2ecf20Sopenharmony_ci bl load_gpr 398c2ecf20Sopenharmony_ciskip_gpr_lc: 408c2ecf20Sopenharmony_ci ld r3, STACK_FRAME_PARAM(2)(sp) 418c2ecf20Sopenharmony_ci cmpdi r3, 0 428c2ecf20Sopenharmony_ci beq skip_fpu_lc 438c2ecf20Sopenharmony_ci bl load_fpu 448c2ecf20Sopenharmony_ciskip_fpu_lc: 458c2ecf20Sopenharmony_ci ld r3, STACK_FRAME_PARAM(3)(sp) 468c2ecf20Sopenharmony_ci cmpdi r3, 0 478c2ecf20Sopenharmony_ci beq skip_vmx_lc 488c2ecf20Sopenharmony_ci bl load_vmx 498c2ecf20Sopenharmony_ciskip_vmx_lc: 508c2ecf20Sopenharmony_ci ld r3, STACK_FRAME_PARAM(4)(sp) 518c2ecf20Sopenharmony_ci cmpdi r3, 0 528c2ecf20Sopenharmony_ci beq skip_vsx_lc 538c2ecf20Sopenharmony_ci bl load_vsx 548c2ecf20Sopenharmony_ciskip_vsx_lc: 558c2ecf20Sopenharmony_ci /* 568c2ecf20Sopenharmony_ci * Set r3 (return value) before tbegin. Use the pid as a known 578c2ecf20Sopenharmony_ci * 'all good' return value, zero is used to indicate a non-doomed 588c2ecf20Sopenharmony_ci * transaction. 598c2ecf20Sopenharmony_ci */ 608c2ecf20Sopenharmony_ci ld r3, STACK_FRAME_PARAM(0)(sp) 618c2ecf20Sopenharmony_ci tbegin. 628c2ecf20Sopenharmony_ci beq 1f 638c2ecf20Sopenharmony_ci tsuspend. /* Can't enter a syscall transactionally */ 648c2ecf20Sopenharmony_ci ld r3, STACK_FRAME_PARAM(1)(sp) 658c2ecf20Sopenharmony_ci cmpdi r3, 0 668c2ecf20Sopenharmony_ci beq skip_gpr_lt 678c2ecf20Sopenharmony_ci /* Get the second half of the array */ 688c2ecf20Sopenharmony_ci addi r3, r3, 8 * 18 698c2ecf20Sopenharmony_ci bl load_gpr 708c2ecf20Sopenharmony_ciskip_gpr_lt: 718c2ecf20Sopenharmony_ci ld r3, STACK_FRAME_PARAM(2)(sp) 728c2ecf20Sopenharmony_ci cmpdi r3, 0 738c2ecf20Sopenharmony_ci beq skip_fpu_lt 748c2ecf20Sopenharmony_ci /* Get the second half of the array */ 758c2ecf20Sopenharmony_ci addi r3, r3, 8 * 18 768c2ecf20Sopenharmony_ci bl load_fpu 778c2ecf20Sopenharmony_ciskip_fpu_lt: 788c2ecf20Sopenharmony_ci ld r3, STACK_FRAME_PARAM(3)(sp) 798c2ecf20Sopenharmony_ci cmpdi r3, 0 808c2ecf20Sopenharmony_ci beq skip_vmx_lt 818c2ecf20Sopenharmony_ci /* Get the second half of the array */ 828c2ecf20Sopenharmony_ci addi r3, r3, 16 * 12 838c2ecf20Sopenharmony_ci bl load_vmx 848c2ecf20Sopenharmony_ciskip_vmx_lt: 858c2ecf20Sopenharmony_ci ld r3, STACK_FRAME_PARAM(4)(sp) 868c2ecf20Sopenharmony_ci cmpdi r3, 0 878c2ecf20Sopenharmony_ci beq skip_vsx_lt 888c2ecf20Sopenharmony_ci /* Get the second half of the array */ 898c2ecf20Sopenharmony_ci addi r3, r3, 16 * 12 908c2ecf20Sopenharmony_ci bl load_vsx 918c2ecf20Sopenharmony_ciskip_vsx_lt: 928c2ecf20Sopenharmony_ci li r0, 37 /* sys_kill */ 938c2ecf20Sopenharmony_ci ld r3, STACK_FRAME_PARAM(0)(sp) /* pid */ 948c2ecf20Sopenharmony_ci li r4, 10 /* SIGUSR1 */ 958c2ecf20Sopenharmony_ci sc /* Taking the signal will doom the transaction */ 968c2ecf20Sopenharmony_ci tabort. 0 978c2ecf20Sopenharmony_ci tresume. /* Be super sure we abort */ 988c2ecf20Sopenharmony_ci /* 998c2ecf20Sopenharmony_ci * This will cause us to resume doomed transaction and cause 1008c2ecf20Sopenharmony_ci * hardware to cleanup, we'll end up at 1: anything between 1018c2ecf20Sopenharmony_ci * tresume. and 1: shouldn't ever run. 1028c2ecf20Sopenharmony_ci */ 1038c2ecf20Sopenharmony_ci li r3, 0 1048c2ecf20Sopenharmony_ci 1: 1058c2ecf20Sopenharmony_ci POP_VMX(STACK_FRAME_LOCAL(5,0),r4) 1068c2ecf20Sopenharmony_ci POP_FPU(512) 1078c2ecf20Sopenharmony_ci POP_NVREGS_BELOW_FPU(512) 1088c2ecf20Sopenharmony_ci POP_BASIC_STACK(512) 1098c2ecf20Sopenharmony_ci blr 1108c2ecf20Sopenharmony_ciFUNC_END(tm_signal_self_context_load) 111