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| author | Anup Patel <anup.patel@wdc.com> | 2020-03-19 14:43:16 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2020-03-28 11:01:53 +0300 |
| commit | 1de66d170e71fb94732ffc80dcf4e70e623c4f7a (patch) | |
| tree | 8b43a209cd287f5c9cdc0ec5761be6982f1ee664 /include/sbi/sbi_hart.h | |
| parent | 160c88535f07084051ebba97689fc4a7b2e9037c (diff) | |
| download | opensbi-1de66d170e71fb94732ffc80dcf4e70e623c4f7a.tar.xz | |
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_hart.h')
| -rw-r--r-- | include/sbi/sbi_hart.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/sbi/sbi_hart.h b/include/sbi/sbi_hart.h index fb4a955..4b83b84 100644 --- a/include/sbi/sbi_hart.h +++ b/include/sbi/sbi_hart.h @@ -16,9 +16,11 @@ struct sbi_scratch; int sbi_hart_init(struct sbi_scratch *scratch, u32 hartid, bool cold_boot); -void *sbi_hart_get_trap_info(struct sbi_scratch *scratch); - -void sbi_hart_set_trap_info(struct sbi_scratch *scratch, void *data); +extern void (*sbi_hart_unpriv_trap)(void); +static inline ulong sbi_hart_unpriv_trap_addr(void) +{ + return (ulong)sbi_hart_unpriv_trap; +} void sbi_hart_delegation_dump(struct sbi_scratch *scratch); void sbi_hart_pmp_dump(struct sbi_scratch *scratch); |