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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /include/linux/io.h
Initial import
Diffstat (limited to 'include/linux/io.h')
-rw-r--r--include/linux/io.h116
1 files changed, 116 insertions, 0 deletions
diff --git a/include/linux/io.h b/include/linux/io.h
new file mode 100644
index 000000000..986f2bffe
--- /dev/null
+++ b/include/linux/io.h
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2006 PathScale, Inc. All Rights Reserved.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _LINUX_IO_H
+#define _LINUX_IO_H
+
+#include <linux/types.h>
+#include <asm/io.h>
+#include <asm/page.h>
+
+struct device;
+
+__visible void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
+void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
+
+#ifdef CONFIG_MMU
+int ioremap_page_range(unsigned long addr, unsigned long end,
+ phys_addr_t phys_addr, pgprot_t prot);
+#else
+static inline int ioremap_page_range(unsigned long addr, unsigned long end,
+ phys_addr_t phys_addr, pgprot_t prot)
+{
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
+void __init ioremap_huge_init(void);
+int arch_ioremap_pud_supported(void);
+int arch_ioremap_pmd_supported(void);
+#else
+static inline void ioremap_huge_init(void) { }
+#endif
+
+/*
+ * Managed iomap interface
+ */
+#ifdef CONFIG_HAS_IOPORT_MAP
+void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
+ unsigned int nr);
+void devm_ioport_unmap(struct device *dev, void __iomem *addr);
+#else
+static inline void __iomem *devm_ioport_map(struct device *dev,
+ unsigned long port,
+ unsigned int nr)
+{
+ return NULL;
+}
+
+static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
+{
+}
+#endif
+
+#define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
+
+void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
+ resource_size_t size);
+void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
+ resource_size_t size);
+void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
+ resource_size_t size);
+void devm_iounmap(struct device *dev, void __iomem *addr);
+int check_signature(const volatile void __iomem *io_addr,
+ const unsigned char *signature, int length);
+void devm_ioremap_release(struct device *dev, void *res);
+
+/*
+ * Some systems do not have legacy ISA devices.
+ * /dev/port is not a valid interface on these systems.
+ * So for those archs, <asm/io.h> should define the following symbol.
+ */
+#ifndef arch_has_dev_port
+#define arch_has_dev_port() (1)
+#endif
+
+/*
+ * Some systems (x86 without PAT) have a somewhat reliable way to mark a
+ * physical address range such that uncached mappings will actually
+ * end up write-combining. This facility should be used in conjunction
+ * with pgprot_writecombine, ioremap-wc, or set_memory_wc, since it has
+ * no effect if the per-page mechanisms are functional.
+ * (On x86 without PAT, these functions manipulate MTRRs.)
+ *
+ * arch_phys_del_wc(0) or arch_phys_del_wc(any error code) is guaranteed
+ * to have no effect.
+ */
+#ifndef arch_phys_wc_add
+static inline int __must_check arch_phys_wc_add(unsigned long base,
+ unsigned long size)
+{
+ return 0; /* It worked (i.e. did nothing). */
+}
+
+static inline void arch_phys_wc_del(int handle)
+{
+}
+
+#define arch_phys_wc_add arch_phys_wc_add
+#endif
+
+#endif /* _LINUX_IO_H */