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/*
* 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,
const struct sbi_trap_regs *regs,
unsigned long *out_val,
struct sbi_trap_info *out_trap)
{
int ret = 0;
uint64_t temp;
switch (funcid) {
case SBI_EXT_PMU_NUM_COUNTERS:
ret = sbi_pmu_num_ctr();
if (ret >= 0) {
*out_val = ret;
ret = 0;
}
break;
case SBI_EXT_PMU_COUNTER_GET_INFO:
ret = sbi_pmu_ctr_get_info(regs->a0, out_val);
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_val = ret;
ret = 0;
}
break;
case SBI_EXT_PMU_COUNTER_FW_READ:
ret = sbi_pmu_ctr_fw_read(regs->a0, &temp);
*out_val = temp;
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;
default:
ret = SBI_ENOTSUPP;
};
return ret;
}
static int sbi_ecall_pmu_probe(unsigned long extid, unsigned long *out_val)
{
/* PMU extension is always enabled */
*out_val = 1;
return 0;
}
struct sbi_ecall_extension ecall_pmu = {
.extid_start = SBI_EXT_PMU,
.extid_end = SBI_EXT_PMU,
.handle = sbi_ecall_pmu_handler,
.probe = sbi_ecall_pmu_probe,
};
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