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lib: sbi: Simplify HSM platform operations

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Instead of having hsm_start(), hsm_stop() and hsm_suspend()
callbacks in platform operations, it will be much simpler for
HSM driver to directly register these operations as a device
to the sbi_hsm implementation.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Anup Patel
2021-04-22 14:14:02 +05:30
committed by Anup Patel
parent 043d088e39
commit a84a1ddbba
4 changed files with 88 additions and 100 deletions
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31
include/sbi/sbi_hsm.h
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@@ -12,9 +12,40 @@
#include <sbi/sbi_types.h>
/** Hart state managment device */
struct sbi_hsm_device {
/** Name of the hart state managment device */
char name[32];
/** Start (or power-up) the given hart */
int (*hart_start)(u32 hartid, ulong saddr);
/**
* Stop (or power-down) the current hart from running. This call
* doesn't expect to return if success.
*/
int (*hart_stop)(void);
/**
* Put the current hart in platform specific suspend (or low-power)
* state.
*
* For successful retentive suspend, the call will return 0 when
* the hart resumes normal execution.
*
* For successful non-retentive suspend, the hart will resume from
* specified resume address
*/
int (*hart_suspend)(u32 suspend_type, ulong raddr);
};
struct sbi_domain;
struct sbi_scratch;
const struct sbi_hsm_device *sbi_hsm_get_device(void);
void sbi_hsm_set_device(const struct sbi_hsm_device *dev);
int sbi_hsm_init(struct sbi_scratch *scratch, u32 hartid, bool cold_boot);
void __noreturn sbi_hsm_exit(struct sbi_scratch *scratch);