/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2014 Lemote Corporation. * written by Huacai Chen <chenhc@lemote.com> * * based on arch/mips/cavium-octeon/cpu.c * Copyright (C) 2009 Wind River Systems, * written by Ralf Baechle <ralf@linux-mips.org> */ #include <linux/init.h> #include <linux/sched.h> #include <linux/notifier.h> #include <linux/ptrace.h> #include <asm/fpu.h> #include <asm/cop2.h> #include <asm/current.h> #include <asm/mipsregs.h>
static int loongson_cu2_call(struct notifier_block *nfb, unsigned long action, void *data) { int fpu_owned; int fr = !test_thread_flag(TIF_32BIT_FPREGS); switch (action) { case CU2_EXCEPTION: preempt_disable(); fpu_owned = __is_fpu_owner(); if (!fr) set_c0_status(ST0_CU1 | ST0_CU2); else set_c0_status(ST0_CU1 | ST0_CU2 | ST0_FR); enable_fpu_hazard(); KSTK_STATUS(current) |= (ST0_CU1 | ST0_CU2); if (fr) KSTK_STATUS(current) |= ST0_FR; else KSTK_STATUS(current) &= ~ST0_FR; /* If FPU is owned, we needn't init or restore fp */ if (!fpu_owned) { set_thread_flag(TIF_USEDFPU); if (!used_math()) { _init_fpu(current->thread.fpu.fcr31); set_used_math(); } else _restore_fp(current); } preempt_enable(); return NOTIFY_STOP; /* Don't call default notifier */ } return NOTIFY_OK; /* Let default notifier send signals */ }Contributors
Person | Tokens | Prop | Commits | CommitProp |
Huacai Chen | 147 | 94.23% | 2 | 66.67% |
Maciej W. Rozycki | 9 | 5.77% | 1 | 33.33% |
Total | 156 | 100.00% | 3 | 100.00% |
Person | Tokens | Prop | Commits | CommitProp |
Huacai Chen | 17 | 100.00% | 1 | 100.00% |
Total | 17 | 100.00% | 1 | 100.00% |
Person | Tokens | Prop | Commits | CommitProp |
Huacai Chen | 191 | 94.09% | 2 | 50.00% |
Maciej W. Rozycki | 9 | 4.43% | 1 | 25.00% |
Arnd Bergmann | 3 | 1.48% | 1 | 25.00% |
Total | 203 | 100.00% | 4 | 100.00% |