From 9e80202352dd49bdd9e67b8b906d86f058431505 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@raptorengineering.com>
Date: Sat, 11 May 2019 15:12:49 -0500
Subject: Initial import of abandoned HQEMU version 2.5.2

---
 src/llvm/include/pmu/pmu-utils.h | 106 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 src/llvm/include/pmu/pmu-utils.h

(limited to 'src/llvm/include/pmu/pmu-utils.h')

diff --git a/src/llvm/include/pmu/pmu-utils.h b/src/llvm/include/pmu/pmu-utils.h
new file mode 100644
index 0000000..5e3e014
--- /dev/null
+++ b/src/llvm/include/pmu/pmu-utils.h
@@ -0,0 +1,106 @@
+/*
+ *  (C) 2018 by Computer System Laboratory, IIS, Academia Sinica, Taiwan.
+ *      See COPYRIGHT in top-level directory.
+ */
+
+#ifndef __PMU_UTILS_H
+#define __PMU_UTILS_H
+
+#include <unistd.h>
+#include <string.h>
+#include <pthread.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/syscall.h>
+#include "perf_event.h"
+
+#ifndef ACCESS_ONCE
+#define ACCESS_ONCE(x) (*(volatile decltype(x) *)&(x))
+#endif
+
+namespace pmu {
+
+static inline int sys_perf_event_open(struct perf_event_attr *attr, pid_t pid,
+                                      int cpu, int group_fd,
+                                      unsigned long flags) {
+    return syscall(__NR_perf_event_open, attr, pid, cpu, group_fd, flags);
+}
+
+static inline void perf_attr_init(struct perf_event_attr *attr, int type,
+                                  int config) {
+    memset(attr, 0, sizeof(struct perf_event_attr));
+    attr->type = type;
+    attr->config = config;
+    attr->size = sizeof(struct perf_event_attr);
+    attr->disabled = 1;
+    attr->exclude_kernel = 1;
+    attr->exclude_guest = 1;
+    attr->exclude_hv = 1;
+}
+
+static inline int perf_event_start(int fd) {
+    return ioctl(fd, PERF_EVENT_IOC_ENABLE, 0);
+}
+
+static inline int perf_event_stop(int fd) {
+    return ioctl(fd, PERF_EVENT_IOC_DISABLE, 0);
+}
+
+static inline int perf_event_reset(int fd) {
+    return ioctl(fd, PERF_EVENT_IOC_RESET, 0);
+}
+
+static inline int perf_event_set_filter(int fd, const char *arg) {
+    return ioctl(fd, PERF_EVENT_IOC_SET_FILTER, (void *)arg);
+}
+
+static inline uint64_t perf_read_data_head(void *header) {
+    struct perf_event_mmap_page *pc = (struct perf_event_mmap_page *)header;
+    uint64_t head = ACCESS_ONCE(pc->data_head);
+    pmu_rmb();
+    return head;
+}
+
+static inline void perf_write_data_tail(void *header, uint64_t val) {
+    struct perf_event_mmap_page *pc = (struct perf_event_mmap_page *)header;
+    pmu_mb();
+    pc->data_tail = val;
+}
+
+static inline uint64_t perf_read_aux_head(void *header) {
+    struct perf_event_mmap_page *pc = (struct perf_event_mmap_page *)header;
+    uint64_t head = ACCESS_ONCE(pc->aux_head);
+    pmu_rmb();
+    return head;
+}
+
+static inline void perf_write_aux_tail(void *header, uint64_t val) {
+    struct perf_event_mmap_page *pc = (struct perf_event_mmap_page *)header;
+    pmu_mb();
+    pc->aux_tail = val;
+}
+
+static inline int isPowerOf2(uint64_t value) {
+    if (!value)
+        return 0;
+    return !(value & (value - 1));
+}
+
+/* Convert system errno to PMU error code. */
+static inline int ErrorCode(int err)
+{
+    switch (err) {
+        case EPERM:
+        case EACCES: return PMU_EPERM;
+        case ENOMEM: return PMU_ENOMEM;
+        default:     return PMU_EEVENT;
+    }
+}
+
+} /* namespace pmu */
+
+#endif /* __PMU_UTILS_H */
+
+/*
+ * vim: ts=8 sts=4 sw=4 expandtab
+ */
-- 
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