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lib: Introduce sbi_hsm_hart_started_mask() API 

This patch introduce sbi_hsm_hart_started_mask() API as
a replacement of sbi_hart_available_mask() API.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Anup Patel 2020-03-02 16:13:50 +05:30 committed by Anup Patel
parent 44ce5b99e9
commit 2db381fc74
2 changed files with 41 additions and 0 deletions
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3
include/sbi/sbi_hsm.h
View File

@ -27,5 +27,8 @@ int sbi_hsm_hart_stop(struct sbi_scratch *scratch, bool exitnow);
int sbi_hsm_hart_get_state(struct sbi_scratch *scratch, u32 hartid);
int sbi_hsm_hart_state_to_status(int state);
bool sbi_hsm_hart_started(struct sbi_scratch *scratch, u32 hartid);
int sbi_hsm_hart_started_mask(struct sbi_scratch *scratch,
ulong hbase, ulong *out_hmask);
void sbi_hsm_prepare_next_jump(struct sbi_scratch *scratch, u32 hartid);
#endif

38
lib/sbi/sbi_hsm.c
View File

@ -77,6 +77,44 @@ bool sbi_hsm_hart_started(struct sbi_scratch *scratch, u32 hartid)
return FALSE;
}
/**
* Get ulong HART mask for given HART base ID
* @param scratch the per-HART scratch pointer
* @param hbase the HART base ID
* @param out_hmask the output ulong HART mask
* @return 0 on success and SBI_Exxx (< 0) on failure
* Note: the output HART mask will be set to zero on failure as well.
*/
int sbi_hsm_hart_started_mask(struct sbi_scratch *scratch,
ulong hbase, ulong *out_hmask)
{
ulong i;
ulong hcount = sbi_platform_hart_count(sbi_platform_ptr(scratch));
/*
* The SBI_HARTMASK_MAX_BITS represents the maximum HART ids generic
* OpenSBI can handle whereas sbi_platform_hart_count() represents
* the maximum HART ids (or HARTs) on underlying platform.
*
* Currently, we only support continuous HART ids so this function
* is written with same assumption. In future, this function will
* change when we support discontinuous and sparse HART ids.
*/
*out_hmask = 0;
if (hcount <= hbase)
return SBI_EINVAL;
if (BITS_PER_LONG < (hcount - hbase))
hcount = BITS_PER_LONG;
for (i = hbase; i < hcount; i++) {
if (sbi_hsm_hart_get_state(scratch, i) == SBI_HART_STARTED)
*out_hmask |= 1UL << (i - hbase);
}
return 0;
}
void sbi_hsm_prepare_next_jump(struct sbi_scratch *scratch, u32 hartid)
{
u32 oldstate;