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107 lines
2.4 KiB
107 lines
2.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. |
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#include <linux/module.h> |
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#include <linux/version.h> |
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#include <linux/sched.h> |
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#include <linux/sched/task_stack.h> |
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#include <linux/sched/debug.h> |
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#include <linux/delay.h> |
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#include <linux/kallsyms.h> |
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#include <linux/uaccess.h> |
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#include <linux/ptrace.h> |
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#include <asm/elf.h> |
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#include <abi/reg_ops.h> |
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struct cpuinfo_csky cpu_data[NR_CPUS]; |
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#ifdef CONFIG_STACKPROTECTOR |
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#include <linux/stackprotector.h> |
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unsigned long __stack_chk_guard __read_mostly; |
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EXPORT_SYMBOL(__stack_chk_guard); |
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#endif |
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asmlinkage void ret_from_fork(void); |
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asmlinkage void ret_from_kernel_thread(void); |
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/* |
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* Some archs flush debug and FPU info here |
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*/ |
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void flush_thread(void){} |
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int copy_thread(unsigned long clone_flags, |
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unsigned long usp, |
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unsigned long kthread_arg, |
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struct task_struct *p, |
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unsigned long tls) |
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{ |
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struct switch_stack *childstack; |
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struct pt_regs *childregs = task_pt_regs(p); |
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#ifdef CONFIG_CPU_HAS_FPU |
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save_to_user_fp(&p->thread.user_fp); |
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#endif |
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childstack = ((struct switch_stack *) childregs) - 1; |
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memset(childstack, 0, sizeof(struct switch_stack)); |
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/* setup thread.sp for switch_to !!! */ |
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p->thread.sp = (unsigned long)childstack; |
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if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) { |
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memset(childregs, 0, sizeof(struct pt_regs)); |
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childstack->r15 = (unsigned long) ret_from_kernel_thread; |
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childstack->r10 = kthread_arg; |
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childstack->r9 = usp; |
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childregs->sr = mfcr("psr"); |
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} else { |
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*childregs = *(current_pt_regs()); |
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if (usp) |
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childregs->usp = usp; |
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if (clone_flags & CLONE_SETTLS) |
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task_thread_info(p)->tp_value = childregs->tls |
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= tls; |
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childregs->a0 = 0; |
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childstack->r15 = (unsigned long) ret_from_fork; |
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} |
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return 0; |
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} |
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/* Fill in the fpu structure for a core dump. */ |
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int dump_fpu(struct pt_regs *regs, struct user_fp *fpu) |
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{ |
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memcpy(fpu, ¤t->thread.user_fp, sizeof(*fpu)); |
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return 1; |
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} |
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EXPORT_SYMBOL(dump_fpu); |
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int dump_task_regs(struct task_struct *tsk, elf_gregset_t *pr_regs) |
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{ |
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struct pt_regs *regs = task_pt_regs(tsk); |
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/* NOTE: usp is error value. */ |
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ELF_CORE_COPY_REGS((*pr_regs), regs) |
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return 1; |
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} |
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#ifndef CONFIG_CPU_PM_NONE |
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void arch_cpu_idle(void) |
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{ |
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#ifdef CONFIG_CPU_PM_WAIT |
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asm volatile("wait\n"); |
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#endif |
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#ifdef CONFIG_CPU_PM_DOZE |
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asm volatile("doze\n"); |
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#endif |
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#ifdef CONFIG_CPU_PM_STOP |
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asm volatile("stop\n"); |
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#endif |
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raw_local_irq_enable(); |
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} |
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#endif
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