lib: Create a sbi_ipi_data structure

Create a sbi_ipi_data structure that holds unpacked IPI information. At
the same time remove ipi_type from the sbi_scratch struct and use a
fixed offset to access it.

This structure fits in behind the sbi_scratch structure.

This fixes https://github.com/riscv/opensbi/issues/81

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Alistair Francis
2019-03-08 11:22:22 -08:00
committed by Anup Patel
parent 007a6b26d9
commit 508a27204c
3 changed files with 21 additions and 11 deletions

View File

@@ -31,7 +31,7 @@ static int sbi_ipi_send(struct sbi_scratch *scratch, u32 hartid, u32 event)
* trigger the interrupt
*/
remote_scratch = sbi_hart_id_to_scratch(scratch, hartid);
atomic_raw_set_bit(event, &remote_scratch->ipi_type);
atomic_raw_set_bit(event, &sbi_ipi_data_ptr(remote_scratch)->ipi_type);
mb();
sbi_platform_ipi_send(plat, hartid);
if (event != SBI_IPI_EVENT_SOFT)
@@ -80,7 +80,7 @@ void sbi_ipi_process(struct sbi_scratch *scratch)
sbi_platform_ipi_clear(plat, hartid);
do {
ipi_type = scratch->ipi_type;
ipi_type = sbi_ipi_data_ptr(scratch)->ipi_type;
rmb();
ipi_event = __ffs(ipi_type);
switch (ipi_event) {
@@ -97,12 +97,14 @@ void sbi_ipi_process(struct sbi_scratch *scratch)
sbi_hart_hang();
break;
};
ipi_type = atomic_raw_clear_bit(ipi_event, &scratch->ipi_type);
ipi_type = atomic_raw_clear_bit(ipi_event, &sbi_ipi_data_ptr(scratch)->ipi_type);
} while(ipi_type > 0);
}
int sbi_ipi_init(struct sbi_scratch *scratch, bool cold_boot)
{
sbi_ipi_data_ptr(scratch)->ipi_type = 0x00;
/* Enable software interrupts */
csr_set(CSR_MIE, MIP_MSIP);