lib: sbi_scratch: Introduce HART id to scratch table

Instead of calling hartid_to_scratch() callback every time when
we want sbi_scratch pointer from HART id, we create a table of
sbi_scratch pointers and use that to get sbi_scratch pointer.

As a result of HART id to scratch table, the conversion of
HART id to sbi_scratch pointer is just 2-3 instructions which
was 9 instructions previously.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-03-14 09:57:45 +05:30
committed by Anup Patel
parent 3f8d754c2c
commit 87a7ef7659
3 changed files with 28 additions and 2 deletions

View File

@@ -85,6 +85,9 @@ enum sbi_scratch_options {
#define sbi_scratch_thishart_arg1_ptr() \
((void *)(sbi_scratch_thishart_ptr()->next_arg1))
/** Initialize scatch table and allocator */
int sbi_scratch_init(struct sbi_scratch *scratch);
/**
* Allocate from extra space in sbi_scratch
*
@@ -103,11 +106,12 @@ void sbi_scratch_free_offset(unsigned long offset);
#define sbi_scratch_thishart_offset_ptr(offset) \
((void *)sbi_scratch_thishart_ptr() + (offset))
typedef struct sbi_scratch *(*hartid2scratch)(ulong hartid);
/** HART id to scratch table */
extern struct sbi_scratch *hartid_to_scratch_table[];
/** Get sbi_scratch from HART id */
#define sbi_hart_id_to_scratch(__scratch, __hartid) \
((hartid2scratch)(__scratch)->hartid_to_scratch)(__hartid)
hartid_to_scratch_table[__hartid]
#endif