1 files changed, 80 insertions, 0 deletions
diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h
new file mode 100644
index 000000000..4453ad7c1
--- /dev/null
+++ b/arch/s390/include/asm/io.h
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  S390 version
+ *    Copyright IBM Corp. 1999
+ *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
+ *
+ *  Derived from "include/asm-i386/io.h"
+ */
+
+#ifndef _S390_IO_H
+#define _S390_IO_H
+
+#include <linux/kernel.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/pci_io.h>
+
+#define xlate_dev_mem_ptr xlate_dev_mem_ptr
+void *xlate_dev_mem_ptr(phys_addr_t phys);
+#define unxlate_dev_mem_ptr unxlate_dev_mem_ptr
+void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr);
+
+#define IO_SPACE_LIMIT 0
+
+/*
+ * I/O memory mapping functions.
+ */
+#define ioremap_prot ioremap_prot
+#define iounmap iounmap
+
+#define _PAGE_IOREMAP pgprot_val(PAGE_KERNEL)
+
+#define ioremap_wc(addr, size)  \
+	ioremap_prot((addr), (size), pgprot_val(pgprot_writecombine(PAGE_KERNEL)))
+#define ioremap_wt(addr, size)  \
+	ioremap_prot((addr), (size), pgprot_val(pgprot_writethrough(PAGE_KERNEL)))
+
+static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
+{
+	return NULL;
+}
+
+static inline void ioport_unmap(void __iomem *p)
+{
+}
+
+#ifdef CONFIG_PCI
+
+/*
+ * s390 needs a private implementation of pci_iomap since ioremap with its
+ * offset parameter isn't sufficient. That's because BAR spaces are not
+ * disjunctive on s390 so we need the bar parameter of pci_iomap to find
+ * the corresponding device and create the mapping cookie.
+ */
+#define pci_iomap pci_iomap
+#define pci_iomap_range pci_iomap_range
+#define pci_iounmap pci_iounmap
+#define pci_iomap_wc pci_iomap_wc
+#define pci_iomap_wc_range pci_iomap_wc_range
+
+#define memcpy_fromio(dst, src, count)	zpci_memcpy_fromio(dst, src, count)
+#define memcpy_toio(dst, src, count)	zpci_memcpy_toio(dst, src, count)
+#define memset_io(dst, val, count)	zpci_memset_io(dst, val, count)
+
+#define mmiowb()	zpci_barrier()
+
+#define __raw_readb	zpci_read_u8
+#define __raw_readw	zpci_read_u16
+#define __raw_readl	zpci_read_u32
+#define __raw_readq	zpci_read_u64
+#define __raw_writeb	zpci_write_u8
+#define __raw_writew	zpci_write_u16
+#define __raw_writel	zpci_write_u32
+#define __raw_writeq	zpci_write_u64
+
+#endif /* CONFIG_PCI */
+
+#include <asm-generic/io.h>
+
+#endif