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lib: Introduce sbi_ipi_send_smode() API

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Instead of directly calling sbi_ipi_send_many(), we introduce
sbi_ipi_send_smode() for injecting S-mode software interrupts.

This way in future we can assign any IPI event number for S-mode
IPIs within sbi_ipi.c only.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel 2020-01-15 11:02:14 +05:30 • committed by Anup Patel
parent 046cc16e8b
commit 3d2aaac69a
3 changed files with 10 additions and 4 deletions
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2
include/sbi/sbi_ipi.h
View file

@ -25,6 +25,8 @@ struct sbi_scratch;
int sbi_ipi_send_many(struct sbi_scratch *scratch, ulong hmask,
ulong hbase, u32 event, void *data);
int sbi_ipi_send_smode(struct sbi_scratch *scratch, ulong hmask, ulong hbase);
void sbi_ipi_clear_smode(struct sbi_scratch *scratch);
void sbi_ipi_process(struct sbi_scratch *scratch);

6
lib/sbi/sbi_ecall.c
View file

@ -155,8 +155,7 @@ int sbi_ecall_ipi_handler(struct sbi_scratch *scratch, unsigned long funcid,
int ret = 0;
if (funcid == SBI_EXT_IPI_SEND_IPI)
ret = sbi_ipi_send_many(scratch, args[0], args[1],
SBI_IPI_EVENT_SOFT, NULL);
ret = sbi_ipi_send_smode(scratch, args[0], args[1]);
else
ret = SBI_ENOTSUPP;
@ -282,8 +281,7 @@ int sbi_ecall_0_1_handler(struct sbi_scratch *scratch, unsigned long extid,
ret = sbi_load_hart_mask_unpriv(scratch, (ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP)
ret = sbi_ipi_send_many(scratch, hmask, 0,
SBI_IPI_EVENT_SOFT, NULL);
ret = sbi_ipi_send_smode(scratch, hmask, 0);
break;
case SBI_EXT_0_1_REMOTE_FENCE_I:
tlb_info.start = 0;

6
lib/sbi/sbi_ipi.c
View file

@ -101,6 +101,12 @@ int sbi_ipi_send_many(struct sbi_scratch *scratch, ulong hmask, ulong hbase,
return 0;
}
int sbi_ipi_send_smode(struct sbi_scratch *scratch, ulong hmask, ulong hbase)
{
return sbi_ipi_send_many(scratch, hmask, hbase,
SBI_IPI_EVENT_SOFT, NULL);
}
void sbi_ipi_clear_smode(struct sbi_scratch *scratch)
{
csr_clear(CSR_MIP, MIP_SSIP);