diff options
| author | Anup Patel <anup.patel@wdc.com> | 2020-03-19 17:13:16 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2020-03-28 13:31:53 +0530 |
| commit | 1de66d170e71fb94732ffc80dcf4e70e623c4f7a (patch) | |
| tree | 8b43a209cd287f5c9cdc0ec5761be6982f1ee664 /include/sbi/sbi_trap.h | |
| parent | 160c88535f07084051ebba97689fc4a7b2e9037c (diff) | |
lib: Optimize unpriv load/store implementation
This patch optimize unpriv load/store implementation by having
dedicated unpriv trap handler (just like KVM RISC-V).
As a result of this optimization:
1. We have reduced roughly 13+ instruction in all unpriv load/store
functions. The reduced instruction also include two function calls.
2. Per-HART trap info pointer in scratch space is now redundant
hence removed.
3. The sbi_trap_handler() is now much cleaner because we don't have
to handle unpriv load/store traps.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Diffstat (limited to 'include/sbi/sbi_trap.h')
| -rw-r--r-- | include/sbi/sbi_trap.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/sbi/sbi_trap.h b/include/sbi/sbi_trap.h index 9a35a6e..b6918e0 100644 --- a/include/sbi/sbi_trap.h +++ b/include/sbi/sbi_trap.h @@ -85,6 +85,19 @@ /** Last member index in sbi_trap_regs */ #define SBI_TRAP_REGS_last 35 +/** Index of epc member in sbi_trap_info */ +#define SBI_TRAP_INFO_epc 0 +/** Index of cause member in sbi_trap_info */ +#define SBI_TRAP_INFO_cause 1 +/** Index of tval member in sbi_trap_info */ +#define SBI_TRAP_INFO_tval 2 +/** Index of tval2 member in sbi_trap_info */ +#define SBI_TRAP_INFO_tval2 3 +/** Index of tinst member in sbi_trap_info */ +#define SBI_TRAP_INFO_tinst 4 +/** Last member index in sbi_trap_info */ +#define SBI_TRAP_INFO_last 5 + /* clang-format on */ /** Get offset of member with name 'x' in sbi_trap_regs */ @@ -92,6 +105,11 @@ /** Size (in bytes) of sbi_trap_regs */ #define SBI_TRAP_REGS_SIZE SBI_TRAP_REGS_OFFSET(last) +/** Get offset of member with name 'x' in sbi_trap_info */ +#define SBI_TRAP_INFO_OFFSET(x) ((SBI_TRAP_INFO_##x) * __SIZEOF_POINTER__) +/** Size (in bytes) of sbi_trap_info */ +#define SBI_TRAP_INFO_SIZE SBI_TRAP_INFO_OFFSET(last) + #ifndef __ASSEMBLY__ #include <sbi/sbi_types.h> |