forked from Mirrors/opensbi
e434584216
Allow the supervisor software to query about the event using the new function. This supports both firmware and hardware events. The hardware event presence is verified hw_event_map which is populated via PMU device tree node. The firmware event presence is checked through event validation function which should take care of both standard and platform firmware events. Signed-off-by: Atish Patra <atishp@rivosinc.com> Reviewed-by: Anup Patel <anup@brainfault.org>
101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
/*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2021 Western Digital Corporation or its affiliates.
|
|
*
|
|
* Authors:
|
|
* Atish Patra <atish.patra@wdc.com>
|
|
*/
|
|
|
|
#include <sbi/sbi_ecall.h>
|
|
#include <sbi/sbi_ecall_interface.h>
|
|
#include <sbi/sbi_error.h>
|
|
#include <sbi/sbi_hart.h>
|
|
#include <sbi/sbi_trap.h>
|
|
#include <sbi/sbi_version.h>
|
|
#include <sbi/sbi_pmu.h>
|
|
#include <sbi/sbi_scratch.h>
|
|
#include <sbi/riscv_asm.h>
|
|
|
|
static int sbi_ecall_pmu_handler(unsigned long extid, unsigned long funcid,
|
|
struct sbi_trap_regs *regs,
|
|
struct sbi_ecall_return *out)
|
|
{
|
|
int ret = 0;
|
|
uint64_t temp;
|
|
|
|
switch (funcid) {
|
|
case SBI_EXT_PMU_NUM_COUNTERS:
|
|
ret = sbi_pmu_num_ctr();
|
|
if (ret >= 0) {
|
|
out->value = ret;
|
|
ret = 0;
|
|
}
|
|
break;
|
|
case SBI_EXT_PMU_COUNTER_GET_INFO:
|
|
ret = sbi_pmu_ctr_get_info(regs->a0, &out->value);
|
|
break;
|
|
case SBI_EXT_PMU_COUNTER_CFG_MATCH:
|
|
#if __riscv_xlen == 32
|
|
temp = ((uint64_t)regs->a5 << 32) | regs->a4;
|
|
#else
|
|
temp = regs->a4;
|
|
#endif
|
|
ret = sbi_pmu_ctr_cfg_match(regs->a0, regs->a1, regs->a2,
|
|
regs->a3, temp);
|
|
if (ret >= 0) {
|
|
out->value = ret;
|
|
ret = 0;
|
|
}
|
|
|
|
break;
|
|
case SBI_EXT_PMU_COUNTER_FW_READ:
|
|
ret = sbi_pmu_ctr_fw_read(regs->a0, &temp);
|
|
out->value = temp;
|
|
break;
|
|
case SBI_EXT_PMU_COUNTER_FW_READ_HI:
|
|
#if __riscv_xlen == 32
|
|
ret = sbi_pmu_ctr_fw_read(regs->a0, &temp);
|
|
out->value = temp >> 32;
|
|
#else
|
|
out->value = 0;
|
|
#endif
|
|
break;
|
|
case SBI_EXT_PMU_COUNTER_START:
|
|
|
|
#if __riscv_xlen == 32
|
|
temp = ((uint64_t)regs->a4 << 32) | regs->a3;
|
|
#else
|
|
temp = regs->a3;
|
|
#endif
|
|
ret = sbi_pmu_ctr_start(regs->a0, regs->a1, regs->a2, temp);
|
|
break;
|
|
case SBI_EXT_PMU_COUNTER_STOP:
|
|
ret = sbi_pmu_ctr_stop(regs->a0, regs->a1, regs->a2);
|
|
break;
|
|
case SBI_EXT_PMU_EVENT_GET_INFO:
|
|
ret = sbi_pmu_event_get_info(regs->a0, regs->a1, regs->a2, regs->a3);
|
|
break;
|
|
case SBI_EXT_PMU_SNAPSHOT_SET_SHMEM:
|
|
/* fallthrough as OpenSBI doesn't support snapshot yet */
|
|
default:
|
|
ret = SBI_ENOTSUPP;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
struct sbi_ecall_extension ecall_pmu;
|
|
|
|
static int sbi_ecall_pmu_register_extensions(void)
|
|
{
|
|
return sbi_ecall_register_extension(&ecall_pmu);
|
|
}
|
|
|
|
struct sbi_ecall_extension ecall_pmu = {
|
|
.extid_start = SBI_EXT_PMU,
|
|
.extid_end = SBI_EXT_PMU,
|
|
.register_extensions = sbi_ecall_pmu_register_extensions,
|
|
.handle = sbi_ecall_pmu_handler,
|
|
};
|