419 lines
11 KiB
C
419 lines
11 KiB
C
![]() |
#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
|