diff --git a/libc/kernel/uapi/linux/counter.h b/libc/kernel/uapi/linux/counter.h
new file mode 100644
index 0000000..091e33d
--- /dev/null
+++ b/libc/kernel/uapi/linux/counter.h
@@ -0,0 +1,93 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _UAPI_COUNTER_H_
+#define _UAPI_COUNTER_H_
+#include <linux/ioctl.h>
+#include <linux/types.h>
+enum counter_component_type {
+  COUNTER_COMPONENT_NONE,
+  COUNTER_COMPONENT_SIGNAL,
+  COUNTER_COMPONENT_COUNT,
+  COUNTER_COMPONENT_FUNCTION,
+  COUNTER_COMPONENT_SYNAPSE_ACTION,
+  COUNTER_COMPONENT_EXTENSION,
+};
+enum counter_scope {
+  COUNTER_SCOPE_DEVICE,
+  COUNTER_SCOPE_SIGNAL,
+  COUNTER_SCOPE_COUNT,
+};
+struct counter_component {
+  __u8 type;
+  __u8 scope;
+  __u8 parent;
+  __u8 id;
+};
+enum counter_event_type {
+  COUNTER_EVENT_OVERFLOW,
+  COUNTER_EVENT_UNDERFLOW,
+  COUNTER_EVENT_OVERFLOW_UNDERFLOW,
+  COUNTER_EVENT_THRESHOLD,
+  COUNTER_EVENT_INDEX,
+};
+struct counter_watch {
+  struct counter_component component;
+  __u8 event;
+  __u8 channel;
+};
+#define COUNTER_ADD_WATCH_IOCTL _IOW(0x3E, 0x00, struct counter_watch)
+#define COUNTER_ENABLE_EVENTS_IOCTL _IO(0x3E, 0x01)
+#define COUNTER_DISABLE_EVENTS_IOCTL _IO(0x3E, 0x02)
+struct counter_event {
+  __aligned_u64 timestamp;
+  __aligned_u64 value;
+  struct counter_watch watch;
+  __u8 status;
+};
+enum counter_count_direction {
+  COUNTER_COUNT_DIRECTION_FORWARD,
+  COUNTER_COUNT_DIRECTION_BACKWARD,
+};
+enum counter_count_mode {
+  COUNTER_COUNT_MODE_NORMAL,
+  COUNTER_COUNT_MODE_RANGE_LIMIT,
+  COUNTER_COUNT_MODE_NON_RECYCLE,
+  COUNTER_COUNT_MODE_MODULO_N,
+};
+enum counter_function {
+  COUNTER_FUNCTION_INCREASE,
+  COUNTER_FUNCTION_DECREASE,
+  COUNTER_FUNCTION_PULSE_DIRECTION,
+  COUNTER_FUNCTION_QUADRATURE_X1_A,
+  COUNTER_FUNCTION_QUADRATURE_X1_B,
+  COUNTER_FUNCTION_QUADRATURE_X2_A,
+  COUNTER_FUNCTION_QUADRATURE_X2_B,
+  COUNTER_FUNCTION_QUADRATURE_X4,
+};
+enum counter_signal_level {
+  COUNTER_SIGNAL_LEVEL_LOW,
+  COUNTER_SIGNAL_LEVEL_HIGH,
+};
+enum counter_synapse_action {
+  COUNTER_SYNAPSE_ACTION_NONE,
+  COUNTER_SYNAPSE_ACTION_RISING_EDGE,
+  COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
+  COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
+};
+#endif