mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 12:25:08 +07:00
40b9672a2f
Pull asm/uaccess.h whack-a-mole from Al Viro: "It's linux/uaccess.h, damnit... Oh, well - eventually they'll stop cropping up..." * 'work.whack-a-mole' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: asm-prototypes.h: use linux/uaccess.h, not asm/uaccess.h riscv: use linux/uaccess.h, not asm/uaccess.h... ppc: for put_user() pull linux/uaccess.h, not asm/uaccess.h
130 lines
4.0 KiB
C
130 lines
4.0 KiB
C
/*
|
|
* Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
|
|
* Chen Liqin <liqin.chen@sunplusct.com>
|
|
* Lennox Wu <lennox.wu@sunplusct.com>
|
|
* Copyright (C) 2012 Regents of the University of California
|
|
* Copyright (C) 2017 SiFive
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see the file COPYING, or write
|
|
* to the Free Software Foundation, Inc.,
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/sched/task_stack.h>
|
|
#include <linux/tick.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
#include <asm/unistd.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/csr.h>
|
|
#include <asm/string.h>
|
|
#include <asm/switch_to.h>
|
|
|
|
extern asmlinkage void ret_from_fork(void);
|
|
extern asmlinkage void ret_from_kernel_thread(void);
|
|
|
|
void arch_cpu_idle(void)
|
|
{
|
|
wait_for_interrupt();
|
|
local_irq_enable();
|
|
}
|
|
|
|
void show_regs(struct pt_regs *regs)
|
|
{
|
|
show_regs_print_info(KERN_DEFAULT);
|
|
|
|
pr_cont("sepc: " REG_FMT " ra : " REG_FMT " sp : " REG_FMT "\n",
|
|
regs->sepc, regs->ra, regs->sp);
|
|
pr_cont(" gp : " REG_FMT " tp : " REG_FMT " t0 : " REG_FMT "\n",
|
|
regs->gp, regs->tp, regs->t0);
|
|
pr_cont(" t1 : " REG_FMT " t2 : " REG_FMT " s0 : " REG_FMT "\n",
|
|
regs->t1, regs->t2, regs->s0);
|
|
pr_cont(" s1 : " REG_FMT " a0 : " REG_FMT " a1 : " REG_FMT "\n",
|
|
regs->s1, regs->a0, regs->a1);
|
|
pr_cont(" a2 : " REG_FMT " a3 : " REG_FMT " a4 : " REG_FMT "\n",
|
|
regs->a2, regs->a3, regs->a4);
|
|
pr_cont(" a5 : " REG_FMT " a6 : " REG_FMT " a7 : " REG_FMT "\n",
|
|
regs->a5, regs->a6, regs->a7);
|
|
pr_cont(" s2 : " REG_FMT " s3 : " REG_FMT " s4 : " REG_FMT "\n",
|
|
regs->s2, regs->s3, regs->s4);
|
|
pr_cont(" s5 : " REG_FMT " s6 : " REG_FMT " s7 : " REG_FMT "\n",
|
|
regs->s5, regs->s6, regs->s7);
|
|
pr_cont(" s8 : " REG_FMT " s9 : " REG_FMT " s10: " REG_FMT "\n",
|
|
regs->s8, regs->s9, regs->s10);
|
|
pr_cont(" s11: " REG_FMT " t3 : " REG_FMT " t4 : " REG_FMT "\n",
|
|
regs->s11, regs->t3, regs->t4);
|
|
pr_cont(" t5 : " REG_FMT " t6 : " REG_FMT "\n",
|
|
regs->t5, regs->t6);
|
|
|
|
pr_cont("sstatus: " REG_FMT " sbadaddr: " REG_FMT " scause: " REG_FMT "\n",
|
|
regs->sstatus, regs->sbadaddr, regs->scause);
|
|
}
|
|
|
|
void start_thread(struct pt_regs *regs, unsigned long pc,
|
|
unsigned long sp)
|
|
{
|
|
regs->sstatus = SR_SPIE /* User mode, irqs on */ | SR_FS_INITIAL;
|
|
regs->sepc = pc;
|
|
regs->sp = sp;
|
|
set_fs(USER_DS);
|
|
}
|
|
|
|
void flush_thread(void)
|
|
{
|
|
/*
|
|
* Reset FPU context
|
|
* frm: round to nearest, ties to even (IEEE default)
|
|
* fflags: accrued exceptions cleared
|
|
*/
|
|
memset(¤t->thread.fstate, 0, sizeof(current->thread.fstate));
|
|
}
|
|
|
|
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
|
|
{
|
|
fstate_save(src, task_pt_regs(src));
|
|
*dst = *src;
|
|
return 0;
|
|
}
|
|
|
|
int copy_thread(unsigned long clone_flags, unsigned long usp,
|
|
unsigned long arg, struct task_struct *p)
|
|
{
|
|
struct pt_regs *childregs = task_pt_regs(p);
|
|
|
|
/* p->thread holds context to be restored by __switch_to() */
|
|
if (unlikely(p->flags & PF_KTHREAD)) {
|
|
/* Kernel thread */
|
|
const register unsigned long gp __asm__ ("gp");
|
|
memset(childregs, 0, sizeof(struct pt_regs));
|
|
childregs->gp = gp;
|
|
childregs->sstatus = SR_SPP | SR_SPIE; /* Supervisor, irqs on */
|
|
|
|
p->thread.ra = (unsigned long)ret_from_kernel_thread;
|
|
p->thread.s[0] = usp; /* fn */
|
|
p->thread.s[1] = arg;
|
|
} else {
|
|
*childregs = *(current_pt_regs());
|
|
if (usp) /* User fork */
|
|
childregs->sp = usp;
|
|
if (clone_flags & CLONE_SETTLS)
|
|
childregs->tp = childregs->a5;
|
|
childregs->a0 = 0; /* Return value of fork() */
|
|
p->thread.ra = (unsigned long)ret_from_fork;
|
|
}
|
|
p->thread.sp = (unsigned long)childregs; /* kernel sp */
|
|
return 0;
|
|
}
|