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lib: Add timer exit API

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We add sbi_timer_exit() API for OpenSBI exit path handling in
sbi_exit() implementation.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-01-03 09:18:42 +05:30
parent 55e191e3b0
commit 6469ed101c
4 changed files with 27 additions and 7 deletions
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13
include/sbi/sbi_platform.h
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@@ -125,6 +125,8 @@ struct sbi_platform_operations {
void (*timer_event_stop)(void);
/** Initialize platform timer for current HART */
int (*timer_init)(bool cold_boot);
/** Exit platform timer for current HART */
void (*timer_exit)(void);
/** Reboot the platform */
int (*system_reboot)(u32 type);
@@ -552,6 +554,17 @@ static inline int sbi_platform_timer_init(const struct sbi_platform *plat,
return 0;
}
/**
* Exit the platform timer for current HART
*
* @param plat pointer to struct sbi_platform
*/
static inline void sbi_platform_timer_exit(const struct sbi_platform *plat)
{
if (plat && sbi_platform_ops(plat)->timer_exit)
sbi_platform_ops(plat)->timer_exit();
}
/**
* Reboot the platform
*

4
include/sbi/sbi_timer.h
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@@ -24,12 +24,12 @@ void sbi_timer_set_delta(struct sbi_scratch *scratch, ulong delta);
void sbi_timer_set_delta_upper(struct sbi_scratch *scratch, ulong delta_upper);
void sbi_timer_event_stop(struct sbi_scratch *scratch);
void sbi_timer_event_start(struct sbi_scratch *scratch, u64 next_event);
void sbi_timer_process(struct sbi_scratch *scratch);
int sbi_timer_init(struct sbi_scratch *scratch, bool cold_boot);
void sbi_timer_exit(struct sbi_scratch *scratch);
#endif

2
lib/sbi/sbi_init.c
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@@ -205,6 +205,8 @@ void __noreturn sbi_exit(struct sbi_scratch *scratch)
sbi_platform_early_exit(plat);
sbi_timer_exit(scratch);
sbi_platform_final_exit(plat);
sbi_hart_hang();

15
lib/sbi/sbi_timer.c
View File

@@ -76,11 +76,6 @@ void sbi_timer_set_delta_upper(struct sbi_scratch *scratch, ulong delta_upper)
*time_delta |= ((u64)delta_upper << 32);
}
void sbi_timer_event_stop(struct sbi_scratch *scratch)
{
sbi_platform_timer_event_stop(sbi_platform_ptr(scratch));
}
void sbi_timer_event_start(struct sbi_scratch *scratch, u64 next_event)
{
sbi_platform_timer_event_start(sbi_platform_ptr(scratch), next_event);
@@ -113,3 +108,13 @@ int sbi_timer_init(struct sbi_scratch *scratch, bool cold_boot)
return sbi_platform_timer_init(sbi_platform_ptr(scratch), cold_boot);
}
void sbi_timer_exit(struct sbi_scratch *scratch)
{
sbi_platform_timer_event_stop(sbi_platform_ptr(scratch));
csr_clear(CSR_MIP, MIP_STIP);
csr_clear(CSR_MIE, MIP_MTIP);
sbi_platform_timer_exit(sbi_platform_ptr(scratch));
}