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lib: utils/ipi: Use scratch space to save per-HART MSWI pointer

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Instead of using a global array indexed by hartid, we should use
scratch space to save per-HART MSWI pointer.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
This commit is contained in:
Anup Patel 2023-04-19 21:23:53 +05:30 • committed by Anup Patel
parent 3c1c972cb6
commit acbd8fce9e
1 changed files with 33 additions and 10 deletions
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43
lib/utils/ipi/aclint_mswi.c
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@ -12,21 +12,30 @@
#include <sbi/riscv_io.h>
#include <sbi/sbi_domain.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_hartmask.h>
#include <sbi/sbi_ipi.h>
#include <sbi/sbi_scratch.h>
#include <sbi/sbi_timer.h>
#include <sbi_utils/ipi/aclint_mswi.h>
static struct aclint_mswi_data *mswi_hartid2data[SBI_HARTMASK_MAX_BITS];
static unsigned long mswi_ptr_offset;
#define mswi_get_hart_data_ptr(__scratch) \
sbi_scratch_read_type((__scratch), void *, mswi_ptr_offset)
#define mswi_set_hart_data_ptr(__scratch, __mswi) \
sbi_scratch_write_type((__scratch), void *, mswi_ptr_offset, (__mswi))
static void mswi_ipi_send(u32 target_hart)
{
u32 *msip;
struct sbi_scratch *scratch;
struct aclint_mswi_data *mswi;
if (SBI_HARTMASK_MAX_BITS <= target_hart)
scratch = sbi_hartid_to_scratch(target_hart);
if (!scratch)
return;
mswi = mswi_hartid2data[target_hart];
mswi = mswi_get_hart_data_ptr(scratch);
if (!mswi)
return;
@ -38,11 +47,14 @@ static void mswi_ipi_send(u32 target_hart)
static void mswi_ipi_clear(u32 target_hart)
{
u32 *msip;
struct sbi_scratch *scratch;
struct aclint_mswi_data *mswi;
if (SBI_HARTMASK_MAX_BITS <= target_hart)
scratch = sbi_hartid_to_scratch(target_hart);
if (!scratch)
return;
mswi = mswi_hartid2data[target_hart];
mswi = mswi_get_hart_data_ptr(scratch);
if (!mswi)
return;
@ -69,19 +81,30 @@ int aclint_mswi_cold_init(struct aclint_mswi_data *mswi)
{
u32 i;
int rc;
struct sbi_scratch *scratch;
unsigned long pos, region_size;
struct sbi_domain_memregion reg;
/* Sanity checks */
if (!mswi || (mswi->addr & (ACLINT_MSWI_ALIGN - 1)) ||
(mswi->size < (mswi->hart_count * sizeof(u32))) ||
(mswi->first_hartid + mswi->hart_count > SBI_HARTMASK_MAX_BITS) ||
(!mswi->hart_count || mswi->hart_count > ACLINT_MSWI_MAX_HARTS))
return SBI_EINVAL;
/* Update MSWI hartid table */
for (i = 0; i < mswi->hart_count; i++)
mswi_hartid2data[mswi->first_hartid + i] = mswi;
/* Allocate scratch space pointer */
if (!mswi_ptr_offset) {
mswi_ptr_offset = sbi_scratch_alloc_type_offset(void *);
if (!mswi_ptr_offset)
return SBI_ENOMEM;
}
/* Update MSWI pointer in scratch space */
for (i = 0; i < mswi->hart_count; i++) {
scratch = sbi_hartid_to_scratch(mswi->first_hartid + i);
if (!scratch)
return SBI_ENOENT;
mswi_set_hart_data_ptr(scratch, mswi);
}
/* Add MSWI regions to the root domain */
for (pos = 0; pos < mswi->size; pos += ACLINT_MSWI_ALIGN) {