diff options
| author | Samuel Holland <samuel@sholland.org> | 2022-06-13 04:03:52 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2022-06-13 09:24:06 +0300 |
| commit | 2b79b694a80513696daf072db0fd980e7573b212 (patch) | |
| tree | 7e64f4ba642d226c35a0726f35841ed23bdb5644 /include | |
| parent | 415ecf28f7ade7ba5a48a0cc9be8d45a7539dd89 (diff) | |
| download | opensbi-2b79b694a80513696daf072db0fd980e7573b212.tar.xz | |
lib: irqchip/plic: Add priority save/restore helpers
These can be used by platform code to save the PLIC priority state, if
it would otherwise be lost during non-retentive suspend. The platform
is responsible for allocating all necessary storage.
As a space optimization, store the saved priority values as 8-bit
integers, since that is large enough to hold any priority value on the
relevant platforms.
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sbi_utils/irqchip/plic.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/sbi_utils/irqchip/plic.h b/include/sbi_utils/irqchip/plic.h index 21b2266..48c24f0 100644 --- a/include/sbi_utils/irqchip/plic.h +++ b/include/sbi_utils/irqchip/plic.h @@ -17,6 +17,11 @@ struct plic_data { unsigned long num_src; }; +/* So far, priorities on all consumers of these functions fit in 8 bits. */ +void plic_priority_save(const struct plic_data *plic, u8 *priority); + +void plic_priority_restore(const struct plic_data *plic, const u8 *priority); + void plic_context_save(const struct plic_data *plic, int context_id, u32 *enable, u32 *threshold); |