From cc5be8b72ba5b072030fdd1d382d7156da43114f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= <j.neuschaefer@gmx.net>
Date: Tue, 26 Jul 2016 01:54:34 +0200
Subject: arch/riscv: Add include/arch/barrier.h
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mb() is used in src/arch/riscv/ and src/mainboard/emulation/*-riscv/.
It is currently provided by atomic.h, but I think it fits better into
barrier.h.

The "fence" instruction represents a full memory fence, as opposed to
variants such as "fence r, rw" which represent a partial fence. An
operating system might want to use precisely the right fence, but
coreboot doesn't need this level of performance at the cost of
simplicity.

Change-Id: I8d33ef32ad31e8fda38f6a5183210e7bd6c65815
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/15830
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
---
 src/mainboard/emulation/qemu-riscv/qemu_util.c   | 5 +++--
 src/mainboard/emulation/spike-riscv/spike_util.c | 1 +
 2 files changed, 4 insertions(+), 2 deletions(-)

(limited to 'src/mainboard/emulation')

diff --git a/src/mainboard/emulation/qemu-riscv/qemu_util.c b/src/mainboard/emulation/qemu-riscv/qemu_util.c
index fca7d56ed0..3c2941ce72 100644
--- a/src/mainboard/emulation/qemu-riscv/qemu_util.c
+++ b/src/mainboard/emulation/qemu-riscv/qemu_util.c
@@ -25,11 +25,12 @@
  * MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  */
 
-#include <spike_util.h>
+#include <arch/barrier.h>
 #include <arch/errno.h>
 #include <atomic.h>
-#include <string.h>
 #include <console/console.h>
+#include <spike_util.h>
+#include <string.h>
 
 uintptr_t translate_address(uintptr_t vAddr) {
 	// TODO: implement the page table translation algorithm
diff --git a/src/mainboard/emulation/spike-riscv/spike_util.c b/src/mainboard/emulation/spike-riscv/spike_util.c
index 358cb4428e..f0f5301814 100644
--- a/src/mainboard/emulation/spike-riscv/spike_util.c
+++ b/src/mainboard/emulation/spike-riscv/spike_util.c
@@ -26,6 +26,7 @@
  */
 
 #include <spike_util.h>
+#include <arch/barrier.h>
 #include <arch/errno.h>
 #include <atomic.h>
 #include <string.h>
-- 
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