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lib: sbi: Introduce HART index in sbi_scratch

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We introduce HART index and related helper functions in sbi_scratch
where HART index is contiguous and each HART index maps to a physical
HART id such that 0 <= HART index and HART index < SBI_HARTMASK_MAX_BITS.

The HART index to HART id mapping follows the index2id mapping provided
by the platform. If the platform does not provide index2id mapping then
identity mapping is assumed.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
This commit is contained in:
Anup Patel
2022-09-12 09:50:43 +05:30
committed by Anup Patel
parent 130e65dd9d
commit d1e4dff45b
2 changed files with 67 additions and 15 deletions
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45
include/sbi/sbi_scratch.h
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@@ -202,12 +202,47 @@ do { \
= (__type)(__ptr); \
} while (0)
/** HART id to scratch table */
extern struct sbi_scratch *hartid_to_scratch_table[];
/** Last HART index having a sbi_scratch pointer */
extern u32 last_hartindex_having_scratch;
/** Get last HART index having a sbi_scratch pointer */
#define sbi_scratch_last_hartindex() last_hartindex_having_scratch
/** Check whether a particular HART index is valid or not */
#define sbi_hartindex_valid(__hartindex) \
(((__hartindex) <= sbi_scratch_last_hartindex()) ? true : false)
/** HART index to HART id table */
extern u32 hartindex_to_hartid_table[];
/** Get sbi_scratch from HART index */
#define sbi_hartindex_to_hartid(__hartindex) \
({ \
((__hartindex) <= sbi_scratch_last_hartindex()) ?\
hartindex_to_hartid_table[__hartindex] : -1U; \
})
/** HART index to scratch table */
extern struct sbi_scratch *hartindex_to_scratch_table[];
/** Get sbi_scratch from HART index */
#define sbi_hartindex_to_scratch(__hartindex) \
({ \
((__hartindex) <= sbi_scratch_last_hartindex()) ?\
hartindex_to_scratch_table[__hartindex] : NULL;\
})
/**
* Get logical index for given HART id
* @param hartid physical HART id
* @returns value between 0 to SBI_HARTMASK_MAX_BITS upon success and
* SBI_HARTMASK_MAX_BITS upon failure.
*/
u32 sbi_hartid_to_hartindex(u32 hartid);
/** Get sbi_scratch from HART id */
#define sbi_hartid_to_scratch(__hartid) \
hartid_to_scratch_table[__hartid]
sbi_hartindex_to_scratch(sbi_hartid_to_hartindex(__hartid))
/** Last HART id having a sbi_scratch pointer */
extern u32 last_hartid_having_scratch;
@@ -215,6 +250,10 @@ extern u32 last_hartid_having_scratch;
/** Get last HART id having a sbi_scratch pointer */
#define sbi_scratch_last_hartid() last_hartid_having_scratch
/** Check whether particular HART id is valid or not */
#define sbi_hartid_valid(__hartid) \
sbi_hartindex_valid(sbi_hartid_to_hartindex(__hartid))
#endif
#endif