mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 13:13:57 +08:00
ef34cc3428
Fix Numachip build conflict from:
ce2e572 x86/numachip: Introduce Numachip2 timer mechanisms
drivers/built-in.o:(.discard+0x1b): multiple definition of `__pcpu_unique_cpu_ced'
arch/x86/built-in.o:(.discard+0xa0da): first defined here
Ensure cpu_ced is unique by prefixing with 'numachip2'.
Signed-off-by: Daniel J Blueman <daniel@numascale.com>
Cc: <tipbuild@zytor.com>
Cc: <kbuild-all@01.org>
Cc: Steffen Persvold <sp@numascale.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/*
|
|
*
|
|
* Copyright (C) 2015 Numascale AS. All rights reserved.
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#include <linux/clockchips.h>
|
|
|
|
#include <asm/irq.h>
|
|
#include <asm/numachip/numachip.h>
|
|
#include <asm/numachip/numachip_csr.h>
|
|
|
|
static DEFINE_PER_CPU(struct clock_event_device, numachip2_ced);
|
|
|
|
static cycles_t numachip2_timer_read(struct clocksource *cs)
|
|
{
|
|
return numachip2_read64_lcsr(NUMACHIP2_TIMER_NOW);
|
|
}
|
|
|
|
static struct clocksource numachip2_clocksource = {
|
|
.name = "numachip2",
|
|
.rating = 295,
|
|
.read = numachip2_timer_read,
|
|
.mask = CLOCKSOURCE_MASK(64),
|
|
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
|
|
.mult = 1,
|
|
.shift = 0,
|
|
};
|
|
|
|
static int numachip2_set_next_event(unsigned long delta, struct clock_event_device *ced)
|
|
{
|
|
numachip2_write64_lcsr(NUMACHIP2_TIMER_DEADLINE + numachip2_timer(),
|
|
delta);
|
|
return 0;
|
|
}
|
|
|
|
static struct clock_event_device numachip2_clockevent = {
|
|
.name = "numachip2",
|
|
.rating = 400,
|
|
.set_next_event = numachip2_set_next_event,
|
|
.features = CLOCK_EVT_FEAT_ONESHOT,
|
|
.mult = 1,
|
|
.shift = 0,
|
|
.min_delta_ns = 1250,
|
|
.max_delta_ns = LONG_MAX,
|
|
};
|
|
|
|
static void numachip_timer_interrupt(void)
|
|
{
|
|
struct clock_event_device *ced = this_cpu_ptr(&numachip2_ced);
|
|
|
|
ced->event_handler(ced);
|
|
}
|
|
|
|
static __init void numachip_timer_each(struct work_struct *work)
|
|
{
|
|
unsigned local_apicid = __this_cpu_read(x86_cpu_to_apicid) & 0xff;
|
|
struct clock_event_device *ced = this_cpu_ptr(&numachip2_ced);
|
|
|
|
/* Setup IPI vector to local core and relative timing mode */
|
|
numachip2_write64_lcsr(NUMACHIP2_TIMER_INT + numachip2_timer(),
|
|
(3 << 22) | (X86_PLATFORM_IPI_VECTOR << 14) |
|
|
(local_apicid << 6));
|
|
|
|
*ced = numachip2_clockevent;
|
|
ced->cpumask = cpumask_of(smp_processor_id());
|
|
clockevents_register_device(ced);
|
|
}
|
|
|
|
static int __init numachip_timer_init(void)
|
|
{
|
|
if (numachip_system != 2)
|
|
return -ENODEV;
|
|
|
|
/* Reset timer */
|
|
numachip2_write64_lcsr(NUMACHIP2_TIMER_RESET, 0);
|
|
clocksource_register_hz(&numachip2_clocksource, NSEC_PER_SEC);
|
|
|
|
/* Setup per-cpu clockevents */
|
|
x86_platform_ipi_callback = numachip_timer_interrupt;
|
|
schedule_on_each_cpu(&numachip_timer_each);
|
|
|
|
return 0;
|
|
}
|
|
|
|
arch_initcall(numachip_timer_init);
|