From: Matthew Fioravante <matthew.fioravante@jhuapl.edu>
Date: Mon, 8 Oct 2012 13:36:28 +0000 (+0100)
Subject: minios: Add ioread/iowrite functions to mini-os
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=77e9a4d2ca5cb159161a25705c72bbf2ac25aeef;p=people%2Fliuw%2Flibxenctrl-split%2Fmini-os.git

minios: Add ioread/iowrite functions to mini-os

This patch adds iowritexx() and ioreadxx() functions for interacting
with hardware memory to mini-os. The functions are available in a header
iorw.h

Signed-off-by: Matthew Fioravante <matthew.fioravante@jhuapl.edu>
Acked-by: Samuel Thibault <samuel.thibault@ens-lyons.org>
Reviewed-by: George Dunlap <george.dunlap@eu.citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>
---

diff --git a/arch/x86/iorw.c b/arch/x86/iorw.c
new file mode 100644
index 0000000..3080769
--- /dev/null
+++ b/arch/x86/iorw.c
@@ -0,0 +1,35 @@
+#include <mini-os/iorw.h>
+
+void iowrite8(volatile void* addr, uint8_t val)
+{
+   *((volatile uint8_t*)addr) = val;
+}
+void iowrite16(volatile void* addr, uint16_t val)
+{
+   *((volatile uint16_t*)addr) = val;
+}
+void iowrite32(volatile void* addr, uint32_t val)
+{
+   *((volatile uint32_t*)addr) = val;
+}
+void iowrite64(volatile void* addr, uint64_t val)
+{
+   *((volatile uint64_t*)addr) = val;
+}
+
+uint8_t ioread8(volatile void* addr)
+{
+   return *((volatile uint8_t*) addr);
+}
+uint16_t ioread16(volatile void* addr)
+{
+   return *((volatile uint16_t*) addr);
+}
+uint32_t ioread32(volatile void* addr)
+{
+   return *((volatile uint32_t*) addr);
+}
+uint64_t ioread64(volatile void* addr)
+{
+   return *((volatile uint64_t*) addr);
+}
diff --git a/include/iorw.h b/include/iorw.h
new file mode 100644
index 0000000..d5ec065
--- /dev/null
+++ b/include/iorw.h
@@ -0,0 +1,16 @@
+#ifndef MINIOS_IORW_H
+#define MINIOS_IORW_H
+
+#include <mini-os/types.h>
+
+void iowrite8(volatile void* addr, uint8_t val);
+void iowrite16(volatile void* addr, uint16_t val);
+void iowrite32(volatile void* addr, uint32_t val);
+void iowrite64(volatile void* addr, uint64_t val);
+
+uint8_t ioread8(volatile void* addr);
+uint16_t ioread16(volatile void* addr);
+uint32_t ioread32(volatile void* addr);
+uint64_t ioread64(volatile void* addr);
+
+#endif