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lib: irqchip/plic: Factor out a context init function

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This simplifies both the callers and the callees by removing duplicated
code and consolidating the error handling. It also fixes two bugs in the
process:
  1) ie_words was one too large when plic->num_src was a multiple of 32.
  2) plic_set_ie takes a 32-bit mask, not a Boolean value, so the FPGA
     platforms previously only enabled one out of every 32 interrupts.

Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Samuel Holland <samuel@sholland.org>
This commit is contained in:
Samuel Holland
2022-06-12 20:03:50 -05:00
committed by Anup Patel
parent 2ea7799d56
commit 8c362e7d06
4 changed files with 49 additions and 54 deletions
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8
include/sbi_utils/irqchip/plic.h
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@@ -17,14 +17,12 @@ struct plic_data {
unsigned long num_src;
};
int plic_context_init(const struct plic_data *plic, int context_id,
bool enable, u32 threshold);
int plic_warm_irqchip_init(const struct plic_data *plic,
int m_cntx_id, int s_cntx_id);
int plic_cold_irqchip_init(const struct plic_data *plic);
void plic_set_thresh(const struct plic_data *plic, u32 cntxid, u32 val);
void plic_set_ie(const struct plic_data *plic, u32 cntxid,
u32 word_index, u32 val);
#endif