1b3550164SArnd Bergmann // SPDX-License-Identifier: GPL-2.0 2b3550164SArnd Bergmann /* 3b3550164SArnd Bergmann * Timer tick function for architectures that lack generic clockevents, 4b3550164SArnd Bergmann * consolidated here from m68k/ia64/parisc/arm. 5b3550164SArnd Bergmann */ 6b3550164SArnd Bergmann 7b3550164SArnd Bergmann #include <linux/irq.h> 8b3550164SArnd Bergmann #include <linux/profile.h> 9b3550164SArnd Bergmann #include <linux/timekeeper_internal.h> 10b3550164SArnd Bergmann 11b3550164SArnd Bergmann #include "tick-internal.h" 12b3550164SArnd Bergmann 13*56cc7b8aSArnd Bergmann /** 14*56cc7b8aSArnd Bergmann * legacy_timer_tick() - advances the timekeeping infrastructure 15*56cc7b8aSArnd Bergmann * @ticks: number of ticks, that have elapsed since the last call. 16*56cc7b8aSArnd Bergmann * 17*56cc7b8aSArnd Bergmann * This is used by platforms that have not been converted to 18*56cc7b8aSArnd Bergmann * generic clockevents. 19*56cc7b8aSArnd Bergmann * 20*56cc7b8aSArnd Bergmann * If 'ticks' is zero, the CPU is not handling timekeeping, so 21*56cc7b8aSArnd Bergmann * only perform process accounting and profiling. 22*56cc7b8aSArnd Bergmann * 23*56cc7b8aSArnd Bergmann * Must be called with interrupts disabled. 24*56cc7b8aSArnd Bergmann */ legacy_timer_tick(unsigned long ticks)25b3550164SArnd Bergmannvoid legacy_timer_tick(unsigned long ticks) 26b3550164SArnd Bergmann { 27*56cc7b8aSArnd Bergmann if (ticks) { 28*56cc7b8aSArnd Bergmann raw_spin_lock(&jiffies_lock); 29*56cc7b8aSArnd Bergmann write_seqcount_begin(&jiffies_seq); 30*56cc7b8aSArnd Bergmann do_timer(ticks); 31*56cc7b8aSArnd Bergmann write_seqcount_end(&jiffies_seq); 32*56cc7b8aSArnd Bergmann raw_spin_unlock(&jiffies_lock); 33*56cc7b8aSArnd Bergmann update_wall_time(); 34*56cc7b8aSArnd Bergmann } 35b3550164SArnd Bergmann update_process_times(user_mode(get_irq_regs())); 36b3550164SArnd Bergmann profile_tick(CPU_PROFILING); 37b3550164SArnd Bergmann } 38