^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/version.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/sched/task_stack.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/sched/debug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kallsyms.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <abi/reg_ops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct cpuinfo_csky cpu_data[NR_CPUS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #ifdef CONFIG_STACKPROTECTOR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/stackprotector.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) unsigned long __stack_chk_guard __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) EXPORT_SYMBOL(__stack_chk_guard);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) asmlinkage void ret_from_fork(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) asmlinkage void ret_from_kernel_thread(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * Some archs flush debug and FPU info here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) void flush_thread(void){}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) int copy_thread(unsigned long clone_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) unsigned long usp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) unsigned long kthread_arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct task_struct *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) unsigned long tls)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct switch_stack *childstack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct pt_regs *childregs = task_pt_regs(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #ifdef CONFIG_CPU_HAS_FPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) save_to_user_fp(&p->thread.user_fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) childstack = ((struct switch_stack *) childregs) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) memset(childstack, 0, sizeof(struct switch_stack));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /* setup thread.sp for switch_to !!! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) p->thread.sp = (unsigned long)childstack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (unlikely(p->flags & PF_KTHREAD)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) memset(childregs, 0, sizeof(struct pt_regs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) childstack->r15 = (unsigned long) ret_from_kernel_thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) childstack->r10 = kthread_arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) childstack->r9 = usp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) childregs->sr = mfcr("psr");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) *childregs = *(current_pt_regs());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (usp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) childregs->usp = usp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (clone_flags & CLONE_SETTLS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) task_thread_info(p)->tp_value = childregs->tls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) = tls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) childregs->a0 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) childstack->r15 = (unsigned long) ret_from_fork;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /* Fill in the fpu structure for a core dump. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) int dump_fpu(struct pt_regs *regs, struct user_fp *fpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) memcpy(fpu, ¤t->thread.user_fp, sizeof(*fpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) EXPORT_SYMBOL(dump_fpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int dump_task_regs(struct task_struct *tsk, elf_gregset_t *pr_regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct pt_regs *regs = task_pt_regs(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /* NOTE: usp is error value. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) ELF_CORE_COPY_REGS((*pr_regs), regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #ifndef CONFIG_CPU_PM_NONE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) void arch_cpu_idle(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) #ifdef CONFIG_CPU_PM_WAIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) asm volatile("wait\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #ifdef CONFIG_CPU_PM_DOZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) asm volatile("doze\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #ifdef CONFIG_CPU_PM_STOP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) asm volatile("stop\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) raw_local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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