diff options
| author | Anup Patel <anup.patel@wdc.com> | 2020-01-16 11:38:49 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2020-01-22 12:13:34 +0530 |
| commit | 37923c4a66180b2f7881d959cd631038e81dbfec (patch) | |
| tree | 02b37146d8e63222ae2a7187405b2eb2bdb58c95 /include/sbi/sbi_ecall.h | |
| parent | 0a411bf717d20a212949af443b275fab9469992f (diff) | |
lib: Add dynamic registration of SBI extensions
This patch extends our SBI ecall implementation to allow
dynamic registration of various SBI extensions. Using this
dynamic registration we can break-up SBI ecall implementation
into multiple files and even register experimental/custom
SBI extensions from platform code.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Diffstat (limited to 'include/sbi/sbi_ecall.h')
| -rw-r--r-- | include/sbi/sbi_ecall.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/sbi/sbi_ecall.h b/include/sbi/sbi_ecall.h index a5b47a1..e9a9ef6 100644 --- a/include/sbi/sbi_ecall.h +++ b/include/sbi/sbi_ecall.h @@ -11,15 +11,37 @@ #define __SBI_ECALL_H__ #include <sbi/sbi_types.h> +#include <sbi/sbi_list.h> struct sbi_trap_regs; +struct sbi_trap_info; struct sbi_scratch; +struct sbi_ecall_extension { + struct sbi_dlist head; + unsigned long extid_start; + unsigned long extid_end; + int (* probe)(struct sbi_scratch *scratch, + unsigned long extid, unsigned long *out_val); + int (* handle)(struct sbi_scratch *scratch, + unsigned long extid, unsigned long funcid, + unsigned long *args, unsigned long *out_val, + struct sbi_trap_info *out_trap); +}; + u16 sbi_ecall_version_major(void); u16 sbi_ecall_version_minor(void); +struct sbi_ecall_extension *sbi_ecall_find_extension(unsigned long extid); + +int sbi_ecall_register_extension(struct sbi_ecall_extension *ext); + +void sbi_ecall_unregister_extension(struct sbi_ecall_extension *ext); + int sbi_ecall_handler(u32 hartid, ulong mcause, struct sbi_trap_regs *regs, struct sbi_scratch *scratch); +int sbi_ecall_init(void); + #endif |