|
@@ -0,0 +1,93 @@
|
|
|
+/*
|
|
|
+ * 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_read(regs->a0, out_val);
|
|
|
+ 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)
|
|
|
+{
|
|
|
+ struct sbi_scratch *scratch = sbi_scratch_thishart_ptr();
|
|
|
+
|
|
|
+ /* SBI PMU extension is useless without mcount inhibit features */
|
|
|
+ if (sbi_hart_has_feature(scratch, SBI_HART_HAS_MCOUNTINHIBIT))
|
|
|
+ *out_val = 1;
|
|
|
+ else
|
|
|
+ *out_val = 0;
|
|
|
+
|
|
|
+ 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,
|
|
|
+};
|