1 // SPDX-License-Identifier: GPL-2.0-or-later
6  *  Copyright (c) 2009-2013 Silicon Graphics, Inc.  All Rights Reserved.
12 #include <asm/uv/uv_mmrs.h>
13 #include <asm/uv/uv_hub.h>
14 #include <asm/uv/bios.h>
15 #include <asm/uv/uv.h>
38 	.irq			= -1,
92 /* Setup interrupt and return non-zero if early expiration occurred. */
101 	uv_write_global_mmr64(pnode, UVH_INT_CMPB, -1L);  in uv_setup_intr()
121  * Per-cpu timer tracking routines
134 /* Allocate per-node list of cpu timer expiration times. */
141 		return -ENOMEM;  in uv_rtc_allocate_timers()
155 				return -ENOMEM;  in uv_rtc_allocate_timers()
157 			spin_lock_init(&head->lock);  in uv_rtc_allocate_timers()
158 			head->ncpus = uv_blade_nr_possible_cpus(bid);  in uv_rtc_allocate_timers()
159 			head->next_cpu = -1;  in uv_rtc_allocate_timers()
163 		head->cpu[bcpu].lcpu = cpu;  in uv_rtc_allocate_timers()
164 		head->cpu[bcpu].expires = ULLONG_MAX;  in uv_rtc_allocate_timers()
174 	int c, bcpu = -1;  in uv_rtc_find_next_timer()
176 	head->next_cpu = -1;  in uv_rtc_find_next_timer()
177 	for (c = 0; c < head->ncpus; c++) {  in uv_rtc_find_next_timer()
178 		u64 exp = head->cpu[c].expires;  in uv_rtc_find_next_timer()
185 		head->next_cpu = bcpu;  in uv_rtc_find_next_timer()
186 		c = head->cpu[bcpu].lcpu;  in uv_rtc_find_next_timer()
207 	u64 *t = &head->cpu[bcpu].expires;  in uv_rtc_set_timer()
211 	spin_lock_irqsave(&head->lock, flags);  in uv_rtc_set_timer()
213 	next_cpu = head->next_cpu;  in uv_rtc_set_timer()
218 			expires < head->cpu[next_cpu].expires) {  in uv_rtc_set_timer()
219 		head->next_cpu = bcpu;  in uv_rtc_set_timer()
223 			spin_unlock_irqrestore(&head->lock, flags);  in uv_rtc_set_timer()
224 			return -ETIME;  in uv_rtc_set_timer()
228 	spin_unlock_irqrestore(&head->lock, flags);  in uv_rtc_set_timer()
243 	u64 *t = &head->cpu[bcpu].expires;  in uv_rtc_unset_timer()
247 	spin_lock_irqsave(&head->lock, flags);  in uv_rtc_unset_timer()
249 	if ((head->next_cpu == bcpu && uv_read_rtc(NULL) >= *t) || force)  in uv_rtc_unset_timer()
255 		if (head->next_cpu == bcpu)  in uv_rtc_unset_timer()
259 	spin_unlock_irqrestore(&head->lock, flags);  in uv_rtc_unset_timer()
272  * Starting with HUB rev 2.0, the UV RTC register is replicated across all
294 	int ced_cpu = cpumask_first(ced->cpumask);  in uv_rtc_next_event()
300  * Shutdown the RTC timer
304 	int ced_cpu = cpumask_first(evt->cpumask);  in uv_rtc_shutdown()
315 	if (!ced || !ced->event_handler)  in uv_rtc_interrupt()
321 	ced->event_handler(ced);  in uv_rtc_interrupt()
337 	ced->cpumask = cpumask_of(smp_processor_id());  in uv_rtc_register_clockevents()
346 		return -ENODEV;  in uv_rtc_setup_clock()
350 		printk(KERN_INFO "UV RTC clocksource failed rc %d\n", rc);  in uv_rtc_setup_clock()
352 		printk(KERN_INFO "UV RTC clocksource registered freq %lu MHz\n",  in uv_rtc_setup_clock()
383 	printk(KERN_INFO "UV RTC clockevents registered\n");  in uv_rtc_setup_clock()
389 	printk(KERN_INFO "UV RTC clockevents failed rc %d\n", rc);  in uv_rtc_setup_clock()