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include: sbi_scratch: Add helper macros to access data type

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Reading and writing a data type in scratch space is a very common
use-case so let us add related helper macros in sbi_scratch.h.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
This commit is contained in:
Anup Patel
2023-06-05 12:22:37 +05:30
committed by Anup Patel
parent bdde2ecd27
commit aad7a37705
1 changed files with 17 additions and 0 deletions
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17
include/sbi/sbi_scratch.h
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@@ -174,6 +174,23 @@ void sbi_scratch_free_offset(unsigned long offset);
#define sbi_scratch_thishart_offset_ptr(offset) \
(void *)((char *)sbi_scratch_thishart_ptr() + (offset))
/** Allocate offset for a data type in sbi_scratch */
#define sbi_scratch_alloc_type_offset(__type) \
sbi_scratch_alloc_offset(sizeof(__type))
/** Read a data type from sbi_scratch at given offset */
#define sbi_scratch_read_type(__scratch, __type, __offset) \
({ \
*((__type *)sbi_scratch_offset_ptr((__scratch), (__offset))); \
})
/** Write a data type to sbi_scratch at given offset */
#define sbi_scratch_write_type(__scratch, __type, __offset, __ptr) \
do { \
*((__type *)sbi_scratch_offset_ptr((__scratch), (__offset))) \
= (__type)(__ptr); \
} while (0)
/** HART id to scratch table */
extern struct sbi_scratch *hartid_to_scratch_table[];