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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-parisc/io.h
downloadlinux-2.6.34-ux500-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-parisc/io.h')
-rw-r--r--include/asm-parisc/io.h418
1 files changed, 418 insertions, 0 deletions
diff --git a/include/asm-parisc/io.h b/include/asm-parisc/io.h
new file mode 100644
index 00000000000..b9bb5946ecc
--- /dev/null
+++ b/include/asm-parisc/io.h
@@ -0,0 +1,418 @@
+#ifndef _ASM_IO_H
+#define _ASM_IO_H
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <asm/pgtable.h>
+
+extern unsigned long parisc_vmerge_boundary;
+extern unsigned long parisc_vmerge_max_size;
+
+#define BIO_VMERGE_BOUNDARY parisc_vmerge_boundary
+#define BIO_VMERGE_MAX_SIZE parisc_vmerge_max_size
+
+#define virt_to_phys(a) ((unsigned long)__pa(a))
+#define phys_to_virt(a) __va(a)
+#define virt_to_bus virt_to_phys
+#define bus_to_virt phys_to_virt
+
+/*
+ * Memory mapped I/O
+ *
+ * readX()/writeX() do byteswapping and take an ioremapped address
+ * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
+ * gsc_*() don't byteswap and operate on physical addresses;
+ * eg dev->hpa or 0xfee00000.
+ */
+
+#ifdef CONFIG_DEBUG_IOREMAP
+#ifdef CONFIG_64BIT
+#define NYBBLE_SHIFT 60
+#else
+#define NYBBLE_SHIFT 28
+#endif
+extern void gsc_bad_addr(unsigned long addr);
+extern void __raw_bad_addr(const volatile void __iomem *addr);
+#define gsc_check_addr(addr) \
+ if ((addr >> NYBBLE_SHIFT) != 0xf) { \
+ gsc_bad_addr(addr); \
+ addr |= 0xfUL << NYBBLE_SHIFT; \
+ }
+#define __raw_check_addr(addr) \
+ if (((unsigned long)addr >> NYBBLE_SHIFT) != 0xe) \
+ __raw_bad_addr(addr); \
+ addr = (void *)((unsigned long)addr | (0xfUL << NYBBLE_SHIFT));
+#else
+#define gsc_check_addr(addr)
+#define __raw_check_addr(addr)
+#endif
+
+static inline unsigned char gsc_readb(unsigned long addr)
+{
+ long flags;
+ unsigned char ret;
+
+ gsc_check_addr(addr);
+
+ __asm__ __volatile__(
+ " rsm 2,%0\n"
+ " ldbx 0(%2),%1\n"
+ " mtsm %0\n"
+ : "=&r" (flags), "=r" (ret) : "r" (addr) );
+
+ return ret;
+}
+
+static inline unsigned short gsc_readw(unsigned long addr)
+{
+ long flags;
+ unsigned short ret;
+
+ gsc_check_addr(addr);
+
+ __asm__ __volatile__(
+ " rsm 2,%0\n"
+ " ldhx 0(%2),%1\n"
+ " mtsm %0\n"
+ : "=&r" (flags), "=r" (ret) : "r" (addr) );
+
+ return ret;
+}
+
+static inline unsigned int gsc_readl(unsigned long addr)
+{
+ u32 ret;
+
+ gsc_check_addr(addr);
+
+ __asm__ __volatile__(
+ " ldwax 0(%1),%0\n"
+ : "=r" (ret) : "r" (addr) );
+
+ return ret;
+}
+
+static inline unsigned long long gsc_readq(unsigned long addr)
+{
+ unsigned long long ret;
+ gsc_check_addr(addr);
+
+#ifdef __LP64__
+ __asm__ __volatile__(
+ " ldda 0(%1),%0\n"
+ : "=r" (ret) : "r" (addr) );
+#else
+ /* two reads may have side effects.. */
+ ret = ((u64) gsc_readl(addr)) << 32;
+ ret |= gsc_readl(addr+4);
+#endif
+ return ret;
+}
+
+static inline void gsc_writeb(unsigned char val, unsigned long addr)
+{
+ long flags;
+ gsc_check_addr(addr);
+
+ __asm__ __volatile__(
+ " rsm 2,%0\n"
+ " stbs %1,0(%2)\n"
+ " mtsm %0\n"
+ : "=&r" (flags) : "r" (val), "r" (addr) );
+}
+
+static inline void gsc_writew(unsigned short val, unsigned long addr)
+{
+ long flags;
+ gsc_check_addr(addr);
+
+ __asm__ __volatile__(
+ " rsm 2,%0\n"
+ " sths %1,0(%2)\n"
+ " mtsm %0\n"
+ : "=&r" (flags) : "r" (val), "r" (addr) );
+}
+
+static inline void gsc_writel(unsigned int val, unsigned long addr)
+{
+ gsc_check_addr(addr);
+
+ __asm__ __volatile__(
+ " stwas %0,0(%1)\n"
+ : : "r" (val), "r" (addr) );
+}
+
+static inline void gsc_writeq(unsigned long long val, unsigned long addr)
+{
+ gsc_check_addr(addr);
+
+#ifdef __LP64__
+ __asm__ __volatile__(
+ " stda %0,0(%1)\n"
+ : : "r" (val), "r" (addr) );
+#else
+ /* two writes may have side effects.. */
+ gsc_writel(val >> 32, addr);
+ gsc_writel(val, addr+4);
+#endif
+}
+
+/*
+ * The standard PCI ioremap interfaces
+ */
+
+extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
+
+extern inline void __iomem * ioremap(unsigned long offset, unsigned long size)
+{
+ return __ioremap(offset, size, 0);
+}
+
+/*
+ * This one maps high address device memory and turns off caching for that area.
+ * it's useful if some control registers are in such an area and write combining
+ * or read caching is not desirable:
+ */
+extern inline void * ioremap_nocache(unsigned long offset, unsigned long size)
+{
+ return __ioremap(offset, size, _PAGE_NO_CACHE /* _PAGE_PCD */);
+}
+
+extern void iounmap(void __iomem *addr);
+
+/*
+ * USE_HPPA_IOREMAP is the magic flag to enable or disable real ioremap()
+ * functionality. It's currently disabled because it may not work on some
+ * machines.
+ */
+#define USE_HPPA_IOREMAP 0
+
+#if USE_HPPA_IOREMAP
+static inline unsigned char __raw_readb(const volatile void __iomem *addr)
+{
+ return (*(volatile unsigned char __force *) (addr));
+}
+static inline unsigned short __raw_readw(const volatile void __iomem *addr)
+{
+ return *(volatile unsigned short __force *) addr;
+}
+static inline unsigned int __raw_readl(const volatile void __iomem *addr)
+{
+ return *(volatile unsigned int __force *) addr;
+}
+static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
+{
+ return *(volatile unsigned long long __force *) addr;
+}
+
+static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
+{
+ *(volatile unsigned char __force *) addr = b;
+}
+static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
+{
+ *(volatile unsigned short __force *) addr = b;
+}
+static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
+{
+ *(volatile unsigned int __force *) addr = b;
+}
+static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
+{
+ *(volatile unsigned long long __force *) addr = b;
+}
+#else /* !USE_HPPA_IOREMAP */
+static inline unsigned char __raw_readb(const volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ return gsc_readb((unsigned long) addr);
+}
+static inline unsigned short __raw_readw(const volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ return gsc_readw((unsigned long) addr);
+}
+static inline unsigned int __raw_readl(const volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ return gsc_readl((unsigned long) addr);
+}
+static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ return gsc_readq((unsigned long) addr);
+}
+
+static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ gsc_writeb(b, (unsigned long) addr);
+}
+static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ gsc_writew(b, (unsigned long) addr);
+}
+static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ gsc_writel(b, (unsigned long) addr);
+}
+static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ gsc_writeq(b, (unsigned long) addr);
+}
+#endif /* !USE_HPPA_IOREMAP */
+
+/* readb can never be const, so use __fswab instead of le*_to_cpu */
+#define readb(addr) __raw_readb(addr)
+#define readw(addr) __fswab16(__raw_readw(addr))
+#define readl(addr) __fswab32(__raw_readl(addr))
+#define readq(addr) __fswab64(__raw_readq(addr))
+#define writeb(b, addr) __raw_writeb(b, addr)
+#define writew(b, addr) __raw_writew(cpu_to_le16(b), addr)
+#define writel(b, addr) __raw_writel(cpu_to_le32(b), addr)
+#define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr)
+
+#define readb_relaxed(addr) readb(addr)
+#define readw_relaxed(addr) readw(addr)
+#define readl_relaxed(addr) readl(addr)
+#define readq_relaxed(addr) readq(addr)
+
+#define mmiowb() do { } while (0)
+
+void memset_io(volatile void __iomem *addr, unsigned char val, int count);
+void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
+void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
+
+/* Support old drivers which don't ioremap.
+ * NB this interface is scheduled to disappear in 2.5
+ */
+
+#define __isa_addr(x) (void __iomem *)(F_EXTEND(0xfc000000) | (x))
+#define isa_readb(a) readb(__isa_addr(a))
+#define isa_readw(a) readw(__isa_addr(a))
+#define isa_readl(a) readl(__isa_addr(a))
+#define isa_writeb(b,a) writeb((b), __isa_addr(a))
+#define isa_writew(b,a) writew((b), __isa_addr(a))
+#define isa_writel(b,a) writel((b), __isa_addr(a))
+#define isa_memset_io(a,b,c) memset_io(__isa_addr(a), (b), (c))
+#define isa_memcpy_fromio(a,b,c) memcpy_fromio((a), __isa_addr(b), (c))
+#define isa_memcpy_toio(a,b,c) memcpy_toio(__isa_addr(a), (b), (c))
+
+
+/*
+ * XXX - We don't have csum_partial_copy_fromio() yet, so we cheat here and
+ * just copy it. The net code will then do the checksum later. Presently
+ * only used by some shared memory 8390 Ethernet cards anyway.
+ */
+
+#define eth_io_copy_and_sum(skb,src,len,unused) \
+ memcpy_fromio((skb)->data,(src),(len))
+#define isa_eth_io_copy_and_sum(skb,src,len,unused) \
+ isa_memcpy_fromio((skb)->data,(src),(len))
+
+/* Port-space IO */
+
+#define inb_p inb
+#define inw_p inw
+#define inl_p inl
+#define outb_p outb
+#define outw_p outw
+#define outl_p outl
+
+extern unsigned char eisa_in8(unsigned short port);
+extern unsigned short eisa_in16(unsigned short port);
+extern unsigned int eisa_in32(unsigned short port);
+extern void eisa_out8(unsigned char data, unsigned short port);
+extern void eisa_out16(unsigned short data, unsigned short port);
+extern void eisa_out32(unsigned int data, unsigned short port);
+
+#if defined(CONFIG_PCI)
+extern unsigned char inb(int addr);
+extern unsigned short inw(int addr);
+extern unsigned int inl(int addr);
+
+extern void outb(unsigned char b, int addr);
+extern void outw(unsigned short b, int addr);
+extern void outl(unsigned int b, int addr);
+#elif defined(CONFIG_EISA)
+#define inb eisa_in8
+#define inw eisa_in16
+#define inl eisa_in32
+#define outb eisa_out8
+#define outw eisa_out16
+#define outl eisa_out32
+#else
+static inline char inb(unsigned long addr)
+{
+ BUG();
+ return -1;
+}
+
+static inline short inw(unsigned long addr)
+{
+ BUG();
+ return -1;
+}
+
+static inline int inl(unsigned long addr)
+{
+ BUG();
+ return -1;
+}
+
+#define outb(x, y) BUG()
+#define outw(x, y) BUG()
+#define outl(x, y) BUG()
+#endif
+
+/*
+ * String versions of in/out ops:
+ */
+extern void insb (unsigned long port, void *dst, unsigned long count);
+extern void insw (unsigned long port, void *dst, unsigned long count);
+extern void insl (unsigned long port, void *dst, unsigned long count);
+extern void outsb (unsigned long port, const void *src, unsigned long count);
+extern void outsw (unsigned long port, const void *src, unsigned long count);
+extern void outsl (unsigned long port, const void *src, unsigned long count);
+
+
+/* IO Port space is : BBiiii where BB is HBA number. */
+#define IO_SPACE_LIMIT 0x00ffffff
+
+
+#define dma_cache_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0)
+#define dma_cache_wback(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0)
+#define dma_cache_wback_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0)
+
+/* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
+ * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
+ * mode (essentially just sign extending. This macro takes in a 32
+ * bit I/O address (still with the leading f) and outputs the correct
+ * value for either 32 or 64 bit mode */
+#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
+
+#include <asm-generic/iomap.h>
+
+/*
+ * Convert a physical pointer to a virtual kernel pointer for /dev/mem
+ * access
+ */
+#define xlate_dev_mem_ptr(p) __va(p)
+
+/*
+ * Convert a virtual cached pointer to an uncached pointer
+ */
+#define xlate_dev_kmem_ptr(p) p
+
+#endif