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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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