cregit-Linux how code gets into the kernel

Release 4.14 arch/mips/loongson64/loongson-3/cop2-ex.c

/*
 * 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

PersonTokensPropCommitsCommitProp
Huacai Chen14794.23%266.67%
Maciej W. Rozycki95.77%133.33%
Total156100.00%3100.00%


static int __init loongson_cu2_setup(void) { return cu2_notifier(loongson_cu2_call, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Huacai Chen17100.00%1100.00%
Total17100.00%1100.00%

early_initcall(loongson_cu2_setup);

Overall Contributors

PersonTokensPropCommitsCommitProp
Huacai Chen19194.09%250.00%
Maciej W. Rozycki94.43%125.00%
Arnd Bergmann31.48%125.00%
Total203100.00%4100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.