From 15e978340d5fea9093cf1705042f331c3ae697ed Mon Sep 17 00:00:00 2001
From: Daniel Verkamp <daniel.verkamp@intel.com>
Date: Tue, 10 Oct 2017 16:41:18 -0700
Subject: [PATCH] mmio: add functions for 1 and 2 byte I/O accesses

Change-Id: I7a325ddd8db3424207cf2e561c6d6e894f549989
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-on: https://review.gerrithub.io/382073
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
---
 include/spdk/mmio.h | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/include/spdk/mmio.h b/include/spdk/mmio.h
index 1dbfa5823..68b16605f 100644
--- a/include/spdk/mmio.h
+++ b/include/spdk/mmio.h
@@ -52,6 +52,34 @@ extern "C" {
 #define SPDK_MMIO_64BIT	0
 #endif
 
+static inline uint8_t
+spdk_mmio_read_1(const volatile uint8_t *addr)
+{
+	spdk_compiler_barrier();
+	return *addr;
+}
+
+static inline void
+spdk_mmio_write_1(volatile uint8_t *addr, uint8_t val)
+{
+	spdk_compiler_barrier();
+	*addr = val;
+}
+
+static inline uint16_t
+spdk_mmio_read_2(const volatile uint16_t *addr)
+{
+	spdk_compiler_barrier();
+	return *addr;
+}
+
+static inline void
+spdk_mmio_write_2(volatile uint16_t *addr, uint16_t val)
+{
+	spdk_compiler_barrier();
+	*addr = val;
+}
+
 static inline uint32_t
 spdk_mmio_read_4(const volatile uint32_t *addr)
 {