blob: b90d75aa1f9e7e7663248a4694ad233351ff1089 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_POWERPC_IDLE_H
#define _ASM_POWERPC_IDLE_H
#include <asm/runlatch.h>
#include <asm/paca.h>
#ifdef CONFIG_PPC_PSERIES
DECLARE_PER_CPU(u64, idle_entry_purr_snap);
static inline void snapshot_purr_idle_entry(void)
{
*this_cpu_ptr(&idle_entry_purr_snap) = mfspr(SPRN_PURR);
}
static inline void update_idle_purr_accounting(void)
{
u64 wait_cycles;
u64 in_purr = *this_cpu_ptr(&idle_entry_purr_snap);
wait_cycles = be64_to_cpu(get_lppaca()->wait_state_cycles);
wait_cycles += mfspr(SPRN_PURR) - in_purr;
get_lppaca()->wait_state_cycles = cpu_to_be64(wait_cycles);
}
static inline void pseries_idle_prolog(void)
{
ppc64_runlatch_off();
snapshot_purr_idle_entry();
/*
* Indicate to the HV that we are idle. Now would be
* a good time to find other work to dispatch.
*/
get_lppaca()->idle = 1;
}
static inline void pseries_idle_epilog(void)
{
update_idle_purr_accounting();
get_lppaca()->idle = 0;
ppc64_runlatch_on();
}
#endif /* CONFIG_PPC_PSERIES */
#endif
|
