blob: 32064a4c0dd78d472b580dad9d16e42b546e2f06 (
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
|
/* 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
static inline void pseries_idle_prolog(unsigned long *in_purr)
{
ppc64_runlatch_off();
*in_purr = mfspr(SPRN_PURR);
/*
* 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(unsigned long in_purr)
{
u64 wait_cycles;
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);
get_lppaca()->idle = 0;
ppc64_runlatch_on();
}
#endif /* CONFIG_PPC_PSERIES */
#endif
|
