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3284bea833
Some of the upcoming SBI extensions (such as SSE) will directly update register state so improve the prototype of ecall handler to accommodate this. Further, this flexibility allows us to push the trap redirection from sbi_ecall_handler() to the sbi_ecall_legacy_handler(). Signed-off-by: Anup Patel <apatel@ventanamicro.com>
98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Atish Patra <atish.patra@wdc.com>
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*/
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#include <sbi/sbi_ecall.h>
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#include <sbi/sbi_ecall_interface.h>
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#include <sbi/sbi_error.h>
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#include <sbi/sbi_hart.h>
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#include <sbi/sbi_trap.h>
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#include <sbi/sbi_version.h>
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#include <sbi/sbi_pmu.h>
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#include <sbi/sbi_scratch.h>
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#include <sbi/riscv_asm.h>
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static int sbi_ecall_pmu_handler(unsigned long extid, unsigned long funcid,
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struct sbi_trap_regs *regs,
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struct sbi_ecall_return *out)
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{
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int ret = 0;
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uint64_t temp;
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switch (funcid) {
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case SBI_EXT_PMU_NUM_COUNTERS:
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ret = sbi_pmu_num_ctr();
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if (ret >= 0) {
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out->value = ret;
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ret = 0;
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}
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break;
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case SBI_EXT_PMU_COUNTER_GET_INFO:
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ret = sbi_pmu_ctr_get_info(regs->a0, &out->value);
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break;
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case SBI_EXT_PMU_COUNTER_CFG_MATCH:
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#if __riscv_xlen == 32
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temp = ((uint64_t)regs->a5 << 32) | regs->a4;
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#else
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temp = regs->a4;
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#endif
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ret = sbi_pmu_ctr_cfg_match(regs->a0, regs->a1, regs->a2,
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regs->a3, temp);
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if (ret >= 0) {
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out->value = ret;
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ret = 0;
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}
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break;
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case SBI_EXT_PMU_COUNTER_FW_READ:
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ret = sbi_pmu_ctr_fw_read(regs->a0, &temp);
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out->value = temp;
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break;
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case SBI_EXT_PMU_COUNTER_FW_READ_HI:
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#if __riscv_xlen == 32
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ret = sbi_pmu_ctr_fw_read(regs->a0, &temp);
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out->value = temp >> 32;
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#else
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out->value = 0;
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#endif
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break;
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case SBI_EXT_PMU_COUNTER_START:
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#if __riscv_xlen == 32
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temp = ((uint64_t)regs->a4 << 32) | regs->a3;
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#else
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temp = regs->a3;
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#endif
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ret = sbi_pmu_ctr_start(regs->a0, regs->a1, regs->a2, temp);
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break;
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case SBI_EXT_PMU_COUNTER_STOP:
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ret = sbi_pmu_ctr_stop(regs->a0, regs->a1, regs->a2);
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break;
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case SBI_EXT_PMU_SNAPSHOT_SET_SHMEM:
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/* fallthrough as OpenSBI doesn't support snapshot yet */
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default:
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ret = SBI_ENOTSUPP;
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}
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return ret;
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}
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struct sbi_ecall_extension ecall_pmu;
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static int sbi_ecall_pmu_register_extensions(void)
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{
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return sbi_ecall_register_extension(&ecall_pmu);
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}
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struct sbi_ecall_extension ecall_pmu = {
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.extid_start = SBI_EXT_PMU,
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.extid_end = SBI_EXT_PMU,
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.register_extensions = sbi_ecall_pmu_register_extensions,
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.handle = sbi_ecall_pmu_handler,
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};
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