Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * Architecture-dependent parts of process handling.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (C) 2013 Altera Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 2009 Wind River Systems Inc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *   Implemented by fredrik.markstrom@gmail.com and ivarholmqvist@gmail.com
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Copyright (C) 2004 Microtronix Datacom Ltd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * License.  See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/sched/debug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/sched/task.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/sched/task_stack.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/mm_types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/tick.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <asm/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <asm/traps.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <asm/cpuinfo.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) asmlinkage void ret_from_fork(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) asmlinkage void ret_from_kernel_thread(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) void (*pm_power_off)(void) = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) EXPORT_SYMBOL(pm_power_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) void arch_cpu_idle(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	raw_local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  * The development boards have no way to pull a board reset. Just jump to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  * cpu reset address and let the boot loader or the code in head.S take care of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  * resetting peripherals.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) void machine_restart(char *__unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	pr_notice("Machine restart (%08x)...\n", cpuinfo.reset_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	__asm__ __volatile__ (
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	"jmp	%0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	: "r" (cpuinfo.reset_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	: "r4");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) void machine_halt(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	pr_notice("Machine halt...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	for (;;)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  * There is no way to power off the development boards. So just spin for now. If
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65)  * we ever have a way of resetting a board using a GPIO we should add that here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) void machine_power_off(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	pr_notice("Machine power off...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	for (;;)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) void show_regs(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	pr_notice("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	show_regs_print_info(KERN_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	pr_notice("r1: %08lx r2: %08lx r3: %08lx r4: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		regs->r1,  regs->r2,  regs->r3,  regs->r4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	pr_notice("r5: %08lx r6: %08lx r7: %08lx r8: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		regs->r5,  regs->r6,  regs->r7,  regs->r8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	pr_notice("r9: %08lx r10: %08lx r11: %08lx r12: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		regs->r9,  regs->r10, regs->r11, regs->r12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	pr_notice("r13: %08lx r14: %08lx r15: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		regs->r13, regs->r14, regs->r15);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	pr_notice("ra: %08lx fp:  %08lx sp: %08lx gp: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		regs->ra,  regs->fp,  regs->sp,  regs->gp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	pr_notice("ea: %08lx estatus: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		regs->ea,  regs->estatus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) void flush_thread(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		struct task_struct *p, unsigned long tls)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct pt_regs *childregs = task_pt_regs(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	struct pt_regs *regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	struct switch_stack *stack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	struct switch_stack *childstack =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		((struct switch_stack *)childregs) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	if (unlikely(p->flags & PF_KTHREAD)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		memset(childstack, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 			sizeof(struct switch_stack) + sizeof(struct pt_regs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		childstack->r16 = usp;		/* fn */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		childstack->r17 = arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		childstack->ra = (unsigned long) ret_from_kernel_thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		childregs->estatus = STATUS_PIE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		childregs->sp = (unsigned long) childstack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		p->thread.ksp = (unsigned long) childstack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		p->thread.kregs = childregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	regs = current_pt_regs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	*childregs = *regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	childregs->r2 = 0;	/* Set the return value for the child. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	childregs->r7 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	stack = ((struct switch_stack *) regs) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	*childstack = *stack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	childstack->ra = (unsigned long)ret_from_fork;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	p->thread.kregs = childregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	p->thread.ksp = (unsigned long) childstack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	if (usp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		childregs->sp = usp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	/* Initialize tls register. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	if (clone_flags & CLONE_SETTLS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		childstack->r23 = tls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)  *	Generic dumping code. Used for panic and debug.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) void dump(struct pt_regs *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	unsigned long	*sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	unsigned char	*tp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	int		i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	pr_emerg("\nCURRENT PROCESS:\n\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	pr_emerg("COMM=%s PID=%d\n", current->comm, current->pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	if (current->mm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		pr_emerg("TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			(int) current->mm->start_code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 			(int) current->mm->end_code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 			(int) current->mm->start_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 			(int) current->mm->end_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 			(int) current->mm->end_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			(int) current->mm->brk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		pr_emerg("USER-STACK=%08x  KERNEL-STACK=%08x\n\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			(int) current->mm->start_stack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 			(int)(((unsigned long) current) + THREAD_SIZE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	pr_emerg("PC: %08lx\n", fp->ea);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	pr_emerg("SR: %08lx    SP: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		(long) fp->estatus, (long) fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	pr_emerg("r1: %08lx    r2: %08lx    r3: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		fp->r1, fp->r2, fp->r3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	pr_emerg("r4: %08lx    r5: %08lx    r6: %08lx    r7: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		fp->r4, fp->r5, fp->r6, fp->r7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	pr_emerg("r8: %08lx    r9: %08lx    r10: %08lx    r11: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		fp->r8, fp->r9, fp->r10, fp->r11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	pr_emerg("r12: %08lx  r13: %08lx    r14: %08lx    r15: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		fp->r12, fp->r13, fp->r14, fp->r15);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	pr_emerg("or2: %08lx   ra: %08lx     fp: %08lx    sp: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		fp->orig_r2, fp->ra, fp->fp, fp->sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	pr_emerg("\nUSP: %08x   TRAPFRAME: %08x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		(unsigned int) fp->sp, (unsigned int) fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	pr_emerg("\nCODE:");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	tp = ((unsigned char *) fp->ea) - 0x20;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	for (sp = (unsigned long *) tp, i = 0; (i < 0x40);  i += 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		if ((i % 0x10) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 			pr_emerg("\n%08x: ", (int) (tp + i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		pr_emerg("%08x ", (int) *sp++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	pr_emerg("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	pr_emerg("\nKERNEL STACK:");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	tp = ((unsigned char *) fp) - 0x40;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		if ((i % 0x10) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 			pr_emerg("\n%08x: ", (int) (tp + i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		pr_emerg("%08x ", (int) *sp++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	pr_emerg("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	pr_emerg("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	pr_emerg("\nUSER STACK:");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	tp = (unsigned char *) (fp->sp - 0x10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	for (sp = (unsigned long *) tp, i = 0; (i < 0x80); i += 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		if ((i % 0x10) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 			pr_emerg("\n%08x: ", (int) (tp + i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		pr_emerg("%08x ", (int) *sp++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	pr_emerg("\n\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) unsigned long get_wchan(struct task_struct *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	unsigned long fp, pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	unsigned long stack_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	int count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	if (!p || p == current || p->state == TASK_RUNNING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	stack_page = (unsigned long)p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	fp = ((struct switch_stack *)p->thread.ksp)->fp;	/* ;dgt2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		if (fp < stack_page+sizeof(struct task_struct) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 			fp >= 8184+stack_page)	/* ;dgt2;tmp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		pc = ((unsigned long *)fp)[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		if (!in_sched_functions(pc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 			return pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		fp = *(unsigned long *) fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	} while (count++ < 16);		/* ;dgt2;tmp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)  * Do necessary setup to start up a newly executed thread.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)  * Will startup in user mode (status_extension = 0).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	memset((void *) regs, 0, sizeof(struct pt_regs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	regs->estatus = ESTATUS_EPIE | ESTATUS_EU;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	regs->ea = pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	regs->sp = sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) asmlinkage int nios2_clone(unsigned long clone_flags, unsigned long newsp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 			   int __user *parent_tidptr, int __user *child_tidptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 			   unsigned long tls)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	struct kernel_clone_args args = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		.flags		= (lower_32_bits(clone_flags) & ~CSIGNAL),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		.pidfd		= parent_tidptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		.child_tid	= child_tidptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		.parent_tid	= parent_tidptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		.exit_signal	= (lower_32_bits(clone_flags) & CSIGNAL),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		.stack		= newsp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		.tls		= tls,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	return kernel_clone(&args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }