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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [IA64] dom0 vp model linux part: import io.h from linux-2.6.16-rc3
# HG changeset patch
# User awilliam@xxxxxxxxxxx
# Node ID c160c05da8d4cc7bf963ae95131d39548c78dca0
# Parent 119effd157927cee7b5bb958ad206797bed1387b
[IA64] dom0 vp model linux part: import io.h from linux-2.6.16-rc3
[note: verified same as linux-2.6.16]
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
diff -r 119effd15792 -r c160c05da8d4 linux-2.6-xen-sparse/include/asm-ia64/io.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/linux-2.6-xen-sparse/include/asm-ia64/io.h Fri Apr 07 13:46:23
2006 -0600
@@ -0,0 +1,477 @@
+#ifndef _ASM_IA64_IO_H
+#define _ASM_IA64_IO_H
+
+/*
+ * This file contains the definitions for the emulated IO instructions
+ * inb/inw/inl/outb/outw/outl and the "string versions" of the same
+ * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
+ * versions of the single-IO instructions (inb_p/inw_p/..).
+ *
+ * This file is not meant to be obfuscating: it's just complicated to
+ * (a) handle it all in a way that makes gcc able to optimize it as
+ * well as possible and (b) trying to avoid writing the same thing
+ * over and over again with slight variations and possibly making a
+ * mistake somewhere.
+ *
+ * Copyright (C) 1998-2003 Hewlett-Packard Co
+ * David Mosberger-Tang <davidm@xxxxxxxxxx>
+ * Copyright (C) 1999 Asit Mallick <asit.k.mallick@xxxxxxxxx>
+ * Copyright (C) 1999 Don Dugger <don.dugger@xxxxxxxxx>
+ */
+
+/* We don't use IO slowdowns on the ia64, but.. */
+#define __SLOW_DOWN_IO do { } while (0)
+#define SLOW_DOWN_IO do { } while (0)
+
+#define __IA64_UNCACHED_OFFSET RGN_BASE(RGN_UNCACHED)
+
+/*
+ * The legacy I/O space defined by the ia64 architecture supports only 65536
ports, but
+ * large machines may have multiple other I/O spaces so we can't place any a
priori limit
+ * on IO_SPACE_LIMIT. These additional spaces are described in ACPI.
+ */
+#define IO_SPACE_LIMIT 0xffffffffffffffffUL
+
+#define MAX_IO_SPACES_BITS 4
+#define MAX_IO_SPACES (1UL << MAX_IO_SPACES_BITS)
+#define IO_SPACE_BITS 24
+#define IO_SPACE_SIZE (1UL << IO_SPACE_BITS)
+
+#define IO_SPACE_NR(port) ((port) >> IO_SPACE_BITS)
+#define IO_SPACE_BASE(space) ((space) << IO_SPACE_BITS)
+#define IO_SPACE_PORT(port) ((port) & (IO_SPACE_SIZE - 1))
+
+#define IO_SPACE_SPARSE_ENCODING(p) ((((p) >> 2) << 12) | ((p) & 0xfff))
+
+struct io_space {
+ unsigned long mmio_base; /* base in MMIO space */
+ int sparse;
+};
+
+extern struct io_space io_space[];
+extern unsigned int num_io_spaces;
+
+# ifdef __KERNEL__
+
+/*
+ * All MMIO iomem cookies are in region 6; anything less is a PIO cookie:
+ * 0xCxxxxxxxxxxxxxxx MMIO cookie (return from ioremap)
+ * 0x000000001SPPPPPP PIO cookie (S=space number, P..P=port)
+ *
+ * ioread/writeX() uses the leading 1 in PIO cookies (PIO_OFFSET) to catch
+ * code that uses bare port numbers without the prerequisite pci_iomap().
+ */
+#define PIO_OFFSET (1UL << (MAX_IO_SPACES_BITS + IO_SPACE_BITS))
+#define PIO_MASK (PIO_OFFSET - 1)
+#define PIO_RESERVED __IA64_UNCACHED_OFFSET
+#define HAVE_ARCH_PIO_SIZE
+
+#include <asm/intrinsics.h>
+#include <asm/machvec.h>
+#include <asm/page.h>
+#include <asm/system.h>
+#include <asm-generic/iomap.h>
+
+/*
+ * Change virtual addresses to physical addresses and vv.
+ */
+static inline unsigned long
+virt_to_phys (volatile void *address)
+{
+ return (unsigned long) address - PAGE_OFFSET;
+}
+
+static inline void*
+phys_to_virt (unsigned long address)
+{
+ return (void *) (address + PAGE_OFFSET);
+}
+
+#define ARCH_HAS_VALID_PHYS_ADDR_RANGE
+extern int valid_phys_addr_range (unsigned long addr, size_t *count); /* efi.c
*/
+extern int valid_mmap_phys_addr_range (unsigned long addr, size_t *count);
+
+/*
+ * The following two macros are deprecated and scheduled for removal.
+ * Please use the PCI-DMA interface defined in <asm/pci.h> instead.
+ */
+#define bus_to_virt phys_to_virt
+#define virt_to_bus virt_to_phys
+#define page_to_bus page_to_phys
+
+# endif /* KERNEL */
+
+/*
+ * Memory fence w/accept. This should never be used in code that is
+ * not IA-64 specific.
+ */
+#define __ia64_mf_a() ia64_mfa()
+
+/**
+ * ___ia64_mmiowb - I/O write barrier
+ *
+ * Ensure ordering of I/O space writes. This will make sure that writes
+ * following the barrier will arrive after all previous writes. For most
+ * ia64 platforms, this is a simple 'mf.a' instruction.
+ *
+ * See Documentation/DocBook/deviceiobook.tmpl for more information.
+ */
+static inline void ___ia64_mmiowb(void)
+{
+ ia64_mfa();
+}
+
+static inline void*
+__ia64_mk_io_addr (unsigned long port)
+{
+ struct io_space *space;
+ unsigned long offset;
+
+ space = &io_space[IO_SPACE_NR(port)];
+ port = IO_SPACE_PORT(port);
+ if (space->sparse)
+ offset = IO_SPACE_SPARSE_ENCODING(port);
+ else
+ offset = port;
+
+ return (void *) (space->mmio_base | offset);
+}
+
+#define __ia64_inb ___ia64_inb
+#define __ia64_inw ___ia64_inw
+#define __ia64_inl ___ia64_inl
+#define __ia64_outb ___ia64_outb
+#define __ia64_outw ___ia64_outw
+#define __ia64_outl ___ia64_outl
+#define __ia64_readb ___ia64_readb
+#define __ia64_readw ___ia64_readw
+#define __ia64_readl ___ia64_readl
+#define __ia64_readq ___ia64_readq
+#define __ia64_readb_relaxed ___ia64_readb
+#define __ia64_readw_relaxed ___ia64_readw
+#define __ia64_readl_relaxed ___ia64_readl
+#define __ia64_readq_relaxed ___ia64_readq
+#define __ia64_writeb ___ia64_writeb
+#define __ia64_writew ___ia64_writew
+#define __ia64_writel ___ia64_writel
+#define __ia64_writeq ___ia64_writeq
+#define __ia64_mmiowb ___ia64_mmiowb
+
+/*
+ * For the in/out routines, we need to do "mf.a" _after_ doing the I/O access
to ensure
+ * that the access has completed before executing other I/O accesses. Since
we're doing
+ * the accesses through an uncachable (UC) translation, the CPU will execute
them in
+ * program order. However, we still need to tell the compiler not to shuffle
them around
+ * during optimization, which is why we use "volatile" pointers.
+ */
+
+static inline unsigned int
+___ia64_inb (unsigned long port)
+{
+ volatile unsigned char *addr = __ia64_mk_io_addr(port);
+ unsigned char ret;
+
+ ret = *addr;
+ __ia64_mf_a();
+ return ret;
+}
+
+static inline unsigned int
+___ia64_inw (unsigned long port)
+{
+ volatile unsigned short *addr = __ia64_mk_io_addr(port);
+ unsigned short ret;
+
+ ret = *addr;
+ __ia64_mf_a();
+ return ret;
+}
+
+static inline unsigned int
+___ia64_inl (unsigned long port)
+{
+ volatile unsigned int *addr = __ia64_mk_io_addr(port);
+ unsigned int ret;
+
+ ret = *addr;
+ __ia64_mf_a();
+ return ret;
+}
+
+static inline void
+___ia64_outb (unsigned char val, unsigned long port)
+{
+ volatile unsigned char *addr = __ia64_mk_io_addr(port);
+
+ *addr = val;
+ __ia64_mf_a();
+}
+
+static inline void
+___ia64_outw (unsigned short val, unsigned long port)
+{
+ volatile unsigned short *addr = __ia64_mk_io_addr(port);
+
+ *addr = val;
+ __ia64_mf_a();
+}
+
+static inline void
+___ia64_outl (unsigned int val, unsigned long port)
+{
+ volatile unsigned int *addr = __ia64_mk_io_addr(port);
+
+ *addr = val;
+ __ia64_mf_a();
+}
+
+static inline void
+__insb (unsigned long port, void *dst, unsigned long count)
+{
+ unsigned char *dp = dst;
+
+ while (count--)
+ *dp++ = platform_inb(port);
+}
+
+static inline void
+__insw (unsigned long port, void *dst, unsigned long count)
+{
+ unsigned short *dp = dst;
+
+ while (count--)
+ *dp++ = platform_inw(port);
+}
+
+static inline void
+__insl (unsigned long port, void *dst, unsigned long count)
+{
+ unsigned int *dp = dst;
+
+ while (count--)
+ *dp++ = platform_inl(port);
+}
+
+static inline void
+__outsb (unsigned long port, const void *src, unsigned long count)
+{
+ const unsigned char *sp = src;
+
+ while (count--)
+ platform_outb(*sp++, port);
+}
+
+static inline void
+__outsw (unsigned long port, const void *src, unsigned long count)
+{
+ const unsigned short *sp = src;
+
+ while (count--)
+ platform_outw(*sp++, port);
+}
+
+static inline void
+__outsl (unsigned long port, const void *src, unsigned long count)
+{
+ const unsigned int *sp = src;
+
+ while (count--)
+ platform_outl(*sp++, port);
+}
+
+/*
+ * Unfortunately, some platforms are broken and do not follow the IA-64
architecture
+ * specification regarding legacy I/O support. Thus, we have to make these
operations
+ * platform dependent...
+ */
+#define __inb platform_inb
+#define __inw platform_inw
+#define __inl platform_inl
+#define __outb platform_outb
+#define __outw platform_outw
+#define __outl platform_outl
+#define __mmiowb platform_mmiowb
+
+#define inb(p) __inb(p)
+#define inw(p) __inw(p)
+#define inl(p) __inl(p)
+#define insb(p,d,c) __insb(p,d,c)
+#define insw(p,d,c) __insw(p,d,c)
+#define insl(p,d,c) __insl(p,d,c)
+#define outb(v,p) __outb(v,p)
+#define outw(v,p) __outw(v,p)
+#define outl(v,p) __outl(v,p)
+#define outsb(p,s,c) __outsb(p,s,c)
+#define outsw(p,s,c) __outsw(p,s,c)
+#define outsl(p,s,c) __outsl(p,s,c)
+#define mmiowb() __mmiowb()
+
+/*
+ * The address passed to these functions are ioremap()ped already.
+ *
+ * We need these to be machine vectors since some platforms don't provide
+ * DMA coherence via PIO reads (PCI drivers and the spec imply that this is
+ * a good idea). Writes are ok though for all existing ia64 platforms (and
+ * hopefully it'll stay that way).
+ */
+static inline unsigned char
+___ia64_readb (const volatile void __iomem *addr)
+{
+ return *(volatile unsigned char __force *)addr;
+}
+
+static inline unsigned short
+___ia64_readw (const volatile void __iomem *addr)
+{
+ return *(volatile unsigned short __force *)addr;
+}
+
+static inline unsigned int
+___ia64_readl (const volatile void __iomem *addr)
+{
+ return *(volatile unsigned int __force *) addr;
+}
+
+static inline unsigned long
+___ia64_readq (const volatile void __iomem *addr)
+{
+ return *(volatile unsigned long __force *) addr;
+}
+
+static inline void
+__writeb (unsigned char val, volatile void __iomem *addr)
+{
+ *(volatile unsigned char __force *) addr = val;
+}
+
+static inline void
+__writew (unsigned short val, volatile void __iomem *addr)
+{
+ *(volatile unsigned short __force *) addr = val;
+}
+
+static inline void
+__writel (unsigned int val, volatile void __iomem *addr)
+{
+ *(volatile unsigned int __force *) addr = val;
+}
+
+static inline void
+__writeq (unsigned long val, volatile void __iomem *addr)
+{
+ *(volatile unsigned long __force *) addr = val;
+}
+
+#define __readb platform_readb
+#define __readw platform_readw
+#define __readl platform_readl
+#define __readq platform_readq
+#define __readb_relaxed platform_readb_relaxed
+#define __readw_relaxed platform_readw_relaxed
+#define __readl_relaxed platform_readl_relaxed
+#define __readq_relaxed platform_readq_relaxed
+
+#define readb(a) __readb((a))
+#define readw(a) __readw((a))
+#define readl(a) __readl((a))
+#define readq(a) __readq((a))
+#define readb_relaxed(a) __readb_relaxed((a))
+#define readw_relaxed(a) __readw_relaxed((a))
+#define readl_relaxed(a) __readl_relaxed((a))
+#define readq_relaxed(a) __readq_relaxed((a))
+#define __raw_readb readb
+#define __raw_readw readw
+#define __raw_readl readl
+#define __raw_readq readq
+#define __raw_readb_relaxed readb_relaxed
+#define __raw_readw_relaxed readw_relaxed
+#define __raw_readl_relaxed readl_relaxed
+#define __raw_readq_relaxed readq_relaxed
+#define writeb(v,a) __writeb((v), (a))
+#define writew(v,a) __writew((v), (a))
+#define writel(v,a) __writel((v), (a))
+#define writeq(v,a) __writeq((v), (a))
+#define __raw_writeb writeb
+#define __raw_writew writew
+#define __raw_writel writel
+#define __raw_writeq writeq
+
+#ifndef inb_p
+# define inb_p inb
+#endif
+#ifndef inw_p
+# define inw_p inw
+#endif
+#ifndef inl_p
+# define inl_p inl
+#endif
+
+#ifndef outb_p
+# define outb_p outb
+#endif
+#ifndef outw_p
+# define outw_p outw
+#endif
+#ifndef outl_p
+# define outl_p outl
+#endif
+
+/*
+ * An "address" in IO memory space is not clearly either an integer or a
pointer. We will
+ * accept both, thus the casts.
+ *
+ * On ia-64, we access the physical I/O memory space through the uncached
kernel region.
+ */
+static inline void __iomem *
+ioremap (unsigned long offset, unsigned long size)
+{
+ return (void __iomem *) (__IA64_UNCACHED_OFFSET | (offset));
+}
+
+static inline void
+iounmap (volatile void __iomem *addr)
+{
+}
+
+#define ioremap_nocache(o,s) ioremap(o,s)
+
+# ifdef __KERNEL__
+
+/*
+ * String version of IO memory access ops:
+ */
+extern void memcpy_fromio(void *dst, const volatile void __iomem *src, long n);
+extern void memcpy_toio(volatile void __iomem *dst, const void *src, long n);
+extern void memset_io(volatile void __iomem *s, int c, long n);
+
+#define dma_cache_inv(_start,_size) do { } while (0)
+#define dma_cache_wback(_start,_size) do { } while (0)
+#define dma_cache_wback_inv(_start,_size) do { } while (0)
+
+# endif /* __KERNEL__ */
+
+/*
+ * Enabling BIO_VMERGE_BOUNDARY forces us to turn off I/O MMU bypassing. It
is said that
+ * BIO-level virtual merging can give up to 4% performance boost (not verified
for ia64).
+ * On the other hand, we know that I/O MMU bypassing gives ~8% performance
improvement on
+ * SPECweb-like workloads on zx1-based machines. Thus, for now we favor I/O
MMU bypassing
+ * over BIO-level virtual merging.
+ */
+extern unsigned long ia64_max_iommu_merge_mask;
+#if 1
+#define BIO_VMERGE_BOUNDARY 0
+#else
+/*
+ * It makes no sense at all to have this BIO_VMERGE_BOUNDARY macro here.
Should be
+ * replaced by dma_merge_mask() or something of that sort. Note: the only way
+ * BIO_VMERGE_BOUNDARY is used is to mask off bits. Effectively, our
definition gets
+ * expanded into:
+ *
+ * addr & ((ia64_max_iommu_merge_mask + 1) - 1) == (addr &
ia64_max_iommu_vmerge_mask)
+ *
+ * which is precisely what we want.
+ */
+#define BIO_VMERGE_BOUNDARY (ia64_max_iommu_merge_mask + 1)
+#endif
+
+#endif /* _ASM_IA64_IO_H */
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