Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Based on arch/arm/kernel/time.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 1991, 1992, 1995  Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Modifications for ARM (C) 1994-2001 Russell King
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Copyright (C) 2012 ARM Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/clockchips.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/init.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/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/timex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/profile.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/syscore_ops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/clocksource.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/of_clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <clocksource/arm_arch_timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <asm/thread_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <asm/stacktrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <asm/paravirt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) unsigned long profile_pc(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	struct stackframe frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	if (!in_lock_functions(regs->pc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		return regs->pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	start_backtrace(&frame, regs->regs[29], regs->pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		int ret = unwind_frame(NULL, &frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	} while (in_lock_functions(frame.pc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	return frame.pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) EXPORT_SYMBOL(profile_pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) void __init time_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	u32 arch_timer_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	of_clk_init(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	timer_probe();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	tick_setup_hrtimer_broadcast();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	arch_timer_rate = arch_timer_get_rate();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	if (!arch_timer_rate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 		panic("Unable to initialise architected timer.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	/* Calibrate the delay loop directly */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	lpj_fine = arch_timer_rate / HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	pv_time_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }