x86: Move uv to platform

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Mike Travis <travis@sgi.com>

1 files changed, 0 insertions, 423 deletions

diff --git a/arch/x86/kernel/uv_time.c b/arch/x86/kernel/uv_time.c
deleted file mode 100644
index 56e421bc379b..000000000000
--- a/arch/x86/kernel/uv_time.c
+++ /dev/null
@@ -1,423 +0,0 @@
-/*
- * SGI RTC clock/timer routines.
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
- *
- *  Copyright (c) 2009 Silicon Graphics, Inc.  All Rights Reserved.
- *  Copyright (c) Dimitri Sivanich
- */
-#include <linux/clockchips.h>
-#include <linux/slab.h>
-
-#include <asm/uv/uv_mmrs.h>
-#include <asm/uv/uv_hub.h>
-#include <asm/uv/bios.h>
-#include <asm/uv/uv.h>
-#include <asm/apic.h>
-#include <asm/cpu.h>
-
-#define RTC_NAME		"sgi_rtc"
-
-static cycle_t uv_read_rtc(struct clocksource *cs);
-static int uv_rtc_next_event(unsigned long, struct clock_event_device *);
-static void uv_rtc_timer_setup(enum clock_event_mode,
-				struct clock_event_device *);
-
-static struct clocksource clocksource_uv = {
-	.name		= RTC_NAME,
-	.rating		= 400,
-	.read		= uv_read_rtc,
-	.mask		= (cycle_t)UVH_RTC_REAL_TIME_CLOCK_MASK,
-	.shift		= 10,
-	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static struct clock_event_device clock_event_device_uv = {
-	.name		= RTC_NAME,
-	.features	= CLOCK_EVT_FEAT_ONESHOT,
-	.shift		= 20,
-	.rating		= 400,
-	.irq		= -1,
-	.set_next_event	= uv_rtc_next_event,
-	.set_mode	= uv_rtc_timer_setup,
-	.event_handler	= NULL,
-};
-
-static DEFINE_PER_CPU(struct clock_event_device, cpu_ced);
-
-/* There is one of these allocated per node */
-struct uv_rtc_timer_head {
-	spinlock_t	lock;
-	/* next cpu waiting for timer, local node relative: */
-	int		next_cpu;
-	/* number of cpus on this node: */
-	int		ncpus;
-	struct {
-		int	lcpu;		/* systemwide logical cpu number */
-		u64	expires;	/* next timer expiration for this cpu */
-	} cpu[1];
-};
-
-/*
- * Access to uv_rtc_timer_head via blade id.
- */
-static struct uv_rtc_timer_head		**blade_info __read_mostly;
-
-static int				uv_rtc_evt_enable;
-
-/*
- * Hardware interface routines
- */
-
-/* Send IPIs to another node */
-static void uv_rtc_send_IPI(int cpu)
-{
-	unsigned long apicid, val;
-	int pnode;
-
-	apicid = cpu_physical_id(cpu);
-	pnode = uv_apicid_to_pnode(apicid);
-	val = (1UL << UVH_IPI_INT_SEND_SHFT) |
-	      (apicid << UVH_IPI_INT_APIC_ID_SHFT) |
-	      (X86_PLATFORM_IPI_VECTOR << UVH_IPI_INT_VECTOR_SHFT);
-
-	uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
-}
-
-/* Check for an RTC interrupt pending */
-static int uv_intr_pending(int pnode)
-{
-	return uv_read_global_mmr64(pnode, UVH_EVENT_OCCURRED0) &
-		UVH_EVENT_OCCURRED0_RTC1_MASK;
-}
-
-/* Setup interrupt and return non-zero if early expiration occurred. */
-static int uv_setup_intr(int cpu, u64 expires)
-{
-	u64 val;
-	int pnode = uv_cpu_to_pnode(cpu);
-
-	uv_write_global_mmr64(pnode, UVH_RTC1_INT_CONFIG,
-		UVH_RTC1_INT_CONFIG_M_MASK);
-	uv_write_global_mmr64(pnode, UVH_INT_CMPB, -1L);
-
-	uv_write_global_mmr64(pnode, UVH_EVENT_OCCURRED0_ALIAS,
-		UVH_EVENT_OCCURRED0_RTC1_MASK);
-
-	val = (X86_PLATFORM_IPI_VECTOR << UVH_RTC1_INT_CONFIG_VECTOR_SHFT) |
-		((u64)cpu_physical_id(cpu) << UVH_RTC1_INT_CONFIG_APIC_ID_SHFT);
-
-	/* Set configuration */
-	uv_write_global_mmr64(pnode, UVH_RTC1_INT_CONFIG, val);
-	/* Initialize comparator value */
-	uv_write_global_mmr64(pnode, UVH_INT_CMPB, expires);
-
-	if (uv_read_rtc(NULL) <= expires)
-		return 0;
-
-	return !uv_intr_pending(pnode);
-}
-
-/*
- * Per-cpu timer tracking routines
- */
-
-static __init void uv_rtc_deallocate_timers(void)
-{
-	int bid;
-
-	for_each_possible_blade(bid) {
-		kfree(blade_info[bid]);
-	}
-	kfree(blade_info);
-}
-
-/* Allocate per-node list of cpu timer expiration times. */
-static __init int uv_rtc_allocate_timers(void)
-{
-	int cpu;
-
-	blade_info = kmalloc(uv_possible_blades * sizeof(void *), GFP_KERNEL);
-	if (!blade_info)
-		return -ENOMEM;
-	memset(blade_info, 0, uv_possible_blades * sizeof(void *));
-
-	for_each_present_cpu(cpu) {
-		int nid = cpu_to_node(cpu);
-		int bid = uv_cpu_to_blade_id(cpu);
-		int bcpu = uv_cpu_hub_info(cpu)->blade_processor_id;
-		struct uv_rtc_timer_head *head = blade_info[bid];
-
-		if (!head) {
-			head = kmalloc_node(sizeof(struct uv_rtc_timer_head) +
-				(uv_blade_nr_possible_cpus(bid) *
-					2 * sizeof(u64)),
-				GFP_KERNEL, nid);
-			if (!head) {
-				uv_rtc_deallocate_timers();
-				return -ENOMEM;
-			}
-			spin_lock_init(&head->lock);
-			head->ncpus = uv_blade_nr_possible_cpus(bid);
-			head->next_cpu = -1;
-			blade_info[bid] = head;
-		}
-
-		head->cpu[bcpu].lcpu = cpu;
-		head->cpu[bcpu].expires = ULLONG_MAX;
-	}
-
-	return 0;
-}
-
-/* Find and set the next expiring timer.  */
-static void uv_rtc_find_next_timer(struct uv_rtc_timer_head *head, int pnode)
-{
-	u64 lowest = ULLONG_MAX;
-	int c, bcpu = -1;
-
-	head->next_cpu = -1;
-	for (c = 0; c < head->ncpus; c++) {
-		u64 exp = head->cpu[c].expires;
-		if (exp < lowest) {
-			bcpu = c;
-			lowest = exp;
-		}
-	}
-	if (bcpu >= 0) {
-		head->next_cpu = bcpu;
-		c = head->cpu[bcpu].lcpu;
-		if (uv_setup_intr(c, lowest))
-			/* If we didn't set it up in time, trigger */
-			uv_rtc_send_IPI(c);
-	} else {
-		uv_write_global_mmr64(pnode, UVH_RTC1_INT_CONFIG,
-			UVH_RTC1_INT_CONFIG_M_MASK);
-	}
-}
-
-/*
- * Set expiration time for current cpu.
- *
- * Returns 1 if we missed the expiration time.
- */
-static int uv_rtc_set_timer(int cpu, u64 expires)
-{
-	int pnode = uv_cpu_to_pnode(cpu);
-	int bid = uv_cpu_to_blade_id(cpu);
-	struct uv_rtc_timer_head *head = blade_info[bid];
-	int bcpu = uv_cpu_hub_info(cpu)->blade_processor_id;
-	u64 *t = &head->cpu[bcpu].expires;
-	unsigned long flags;
-	int next_cpu;
-
-	spin_lock_irqsave(&head->lock, flags);
-
-	next_cpu = head->next_cpu;
-	*t = expires;
-
-	/* Will this one be next to go off? */
-	if (next_cpu < 0 || bcpu == next_cpu ||
-			expires < head->cpu[next_cpu].expires) {
-		head->next_cpu = bcpu;
-		if (uv_setup_intr(cpu, expires)) {
-			*t = ULLONG_MAX;
-			uv_rtc_find_next_timer(head, pnode);
-			spin_unlock_irqrestore(&head->lock, flags);
-			return -ETIME;
-		}
-	}
-
-	spin_unlock_irqrestore(&head->lock, flags);
-	return 0;
-}
-
-/*
- * Unset expiration time for current cpu.
- *
- * Returns 1 if this timer was pending.
- */
-static int uv_rtc_unset_timer(int cpu, int force)
-{
-	int pnode = uv_cpu_to_pnode(cpu);
-	int bid = uv_cpu_to_blade_id(cpu);
-	struct uv_rtc_timer_head *head = blade_info[bid];
-	int bcpu = uv_cpu_hub_info(cpu)->blade_processor_id;
-	u64 *t = &head->cpu[bcpu].expires;
-	unsigned long flags;
-	int rc = 0;
-
-	spin_lock_irqsave(&head->lock, flags);
-
-	if ((head->next_cpu == bcpu && uv_read_rtc(NULL) >= *t) || force)
-		rc = 1;
-
-	if (rc) {
-		*t = ULLONG_MAX;
-		/* Was the hardware setup for this timer? */
-		if (head->next_cpu == bcpu)
-			uv_rtc_find_next_timer(head, pnode);
-	}
-
-	spin_unlock_irqrestore(&head->lock, flags);
-
-	return rc;
-}
-
-
-/*
- * Kernel interface routines.
- */
-
-/*
- * Read the RTC.
- *
- * Starting with HUB rev 2.0, the UV RTC register is replicated across all
- * cachelines of it's own page.  This allows faster simultaneous reads
- * from a given socket.
- */
-static cycle_t uv_read_rtc(struct clocksource *cs)
-{
-	unsigned long offset;
-
-	if (uv_get_min_hub_revision_id() == 1)
-		offset = 0;
-	else
-		offset = (uv_blade_processor_id() * L1_CACHE_BYTES) % PAGE_SIZE;
-
-	return (cycle_t)uv_read_local_mmr(UVH_RTC | offset);
-}
-
-/*
- * Program the next event, relative to now
- */
-static int uv_rtc_next_event(unsigned long delta,
-			     struct clock_event_device *ced)
-{
-	int ced_cpu = cpumask_first(ced->cpumask);
-
-	return uv_rtc_set_timer(ced_cpu, delta + uv_read_rtc(NULL));
-}
-
-/*
- * Setup the RTC timer in oneshot mode
- */
-static void uv_rtc_timer_setup(enum clock_event_mode mode,
-			       struct clock_event_device *evt)
-{
-	int ced_cpu = cpumask_first(evt->cpumask);
-
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-	case CLOCK_EVT_MODE_ONESHOT:
-	case CLOCK_EVT_MODE_RESUME:
-		/* Nothing to do here yet */
-		break;
-	case CLOCK_EVT_MODE_UNUSED:
-	case CLOCK_EVT_MODE_SHUTDOWN:
-		uv_rtc_unset_timer(ced_cpu, 1);
-		break;
-	}
-}
-
-static void uv_rtc_interrupt(void)
-{
-	int cpu = smp_processor_id();
-	struct clock_event_device *ced = &per_cpu(cpu_ced, cpu);
-
-	if (!ced || !ced->event_handler)
-		return;
-
-	if (uv_rtc_unset_timer(cpu, 0) != 1)
-		return;
-
-	ced->event_handler(ced);
-}
-
-static int __init uv_enable_evt_rtc(char *str)
-{
-	uv_rtc_evt_enable = 1;
-
-	return 1;
-}
-__setup("uvrtcevt", uv_enable_evt_rtc);
-
-static __init void uv_rtc_register_clockevents(struct work_struct *dummy)
-{
-	struct clock_event_device *ced = &__get_cpu_var(cpu_ced);
-
-	*ced = clock_event_device_uv;
-	ced->cpumask = cpumask_of(smp_processor_id());
-	clockevents_register_device(ced);
-}
-
-static __init int uv_rtc_setup_clock(void)
-{
-	int rc;
-
-	if (!is_uv_system())
-		return -ENODEV;
-
-	clocksource_uv.mult = clocksource_hz2mult(sn_rtc_cycles_per_second,
-				clocksource_uv.shift);
-
-	/* If single blade, prefer tsc */
-	if (uv_num_possible_blades() == 1)
-		clocksource_uv.rating = 250;
-
-	rc = clocksource_register(&clocksource_uv);
-	if (rc)
-		printk(KERN_INFO "UV RTC clocksource failed rc %d\n", rc);
-	else
-		printk(KERN_INFO "UV RTC clocksource registered freq %lu MHz\n",
-			sn_rtc_cycles_per_second/(unsigned long)1E6);
-
-	if (rc || !uv_rtc_evt_enable || x86_platform_ipi_callback)
-		return rc;
-
-	/* Setup and register clockevents */
-	rc = uv_rtc_allocate_timers();
-	if (rc)
-		goto error;
-
-	x86_platform_ipi_callback = uv_rtc_interrupt;
-
-	clock_event_device_uv.mult = div_sc(sn_rtc_cycles_per_second,
-				NSEC_PER_SEC, clock_event_device_uv.shift);
-
-	clock_event_device_uv.min_delta_ns = NSEC_PER_SEC /
-						sn_rtc_cycles_per_second;
-
-	clock_event_device_uv.max_delta_ns = clocksource_uv.mask *
-				(NSEC_PER_SEC / sn_rtc_cycles_per_second);
-
-	rc = schedule_on_each_cpu(uv_rtc_register_clockevents);
-	if (rc) {
-		x86_platform_ipi_callback = NULL;
-		uv_rtc_deallocate_timers();
-		goto error;
-	}
-
-	printk(KERN_INFO "UV RTC clockevents registered\n");
-
-	return 0;
-
-error:
-	clocksource_unregister(&clocksource_uv);
-	printk(KERN_INFO "UV RTC clockevents failed rc %d\n", rc);
-
-	return rc;
-}
-arch_initcall(uv_rtc_setup_clock);