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#ifndef _ASM_IO_H
#define _ASM_IO_H
#include "asm/types.h"
extern unsigned int va_shift; // Set in entry.S
// Defined in ldscript
extern char _start, _data, _stack, _estack, _end, _vmem, _evmem, _iomem;
// XXX check use and merge
#define phys_to_virt(phys) ((void *) ((unsigned long) (phys)))
#define virt_to_phys(virt) ((unsigned long) (virt))
#ifndef BOOTSTRAP
#ifndef _IO_BASE
#define _IO_BASE 0
#endif
/*
* The insw/outsw/insl/outsl macros don't do byte-swapping.
* They are only used in practice for transferring buffers which
* are arrays of bytes, and byte-swapping is not appropriate in
* that case. - paulus
*/
#define insw(port, buf, ns) _insw_ns((uint16_t *)((port)+_IO_BASE), (buf), (ns))
#define outsw(port, buf, ns) _outsw_ns((uint16_t *)((port)+_IO_BASE), (buf), (ns))
#define inb(port) in_8((uint8_t *)((port)+_IO_BASE))
#define outb(val, port) out_8((uint8_t *)((port)+_IO_BASE), (val))
#define inw(port) in_le16((uint16_t *)((port)+_IO_BASE))
#define outw(val, port) out_le16((uint16_t *)((port)+_IO_BASE), (val))
#define inl(port) in_le32((uint32_t *)((port)+_IO_BASE))
#define outl(val, port) out_le32((uint32_t *)((port)+_IO_BASE), (val))
/*
* 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
*/
static inline int in_8(volatile unsigned char *addr)
{
int ret;
__asm__ __volatile__("ldub [%1], %0\n\t"
"stbar\n\t"
:"=r"(ret):"r"(addr):"memory");
return ret;
}
static inline void out_8(volatile unsigned char *addr, int val)
{
__asm__ __volatile__("stb %0, [%1]\n\t"
"stbar\n\t"
: : "r"(val), "r"(addr):"memory");
}
static inline int in_le16(volatile unsigned short *addr)
{
int ret;
// XXX
__asm__ __volatile__("lduh [%1], %0\n\t"
"stbar\n\t"
:"=r"(ret):"r"(addr):"memory");
return ret;
}
static inline int in_be16(volatile unsigned short *addr)
{
int ret;
__asm__ __volatile__("lduh [%1], %0\n\t"
"stbar\n\t"
:"=r"(ret):"r"(addr):"memory");
return ret;
}
static inline void out_le16(volatile unsigned short *addr, int val)
{
// XXX
__asm__ __volatile__("sth %0, [%1]\n\t"
"stbar\n\t"
: : "r"(val), "r"(addr):"memory");
}
static inline void out_be16(volatile unsigned short *addr, int val)
{
__asm__ __volatile__("sth %0, [%1]\n\t"
"stbar\n\t"
: : "r"(val), "r"(addr):"memory");
}
static inline unsigned in_le32(volatile unsigned *addr)
{
unsigned ret;
// XXX
__asm__ __volatile__("ld [%1], %0\n\t"
"stbar\n\t"
:"=r"(ret):"r"(addr):"memory");
return ret;
}
static inline unsigned in_be32(volatile unsigned *addr)
{
unsigned ret;
__asm__ __volatile__("ld [%1], %0\n\t"
"stbar\n\t"
:"=r"(ret):"r"(addr):"memory");
return ret;
}
static inline void out_le32(volatile unsigned *addr, int val)
{
// XXX
__asm__ __volatile__("st %0, [%1]\n\t"
"stbar\n\t"
: : "r"(val), "r"(addr):"memory");
}
static inline void out_be32(volatile unsigned *addr, int val)
{
__asm__ __volatile__("st %0, [%1]\n\t"
"stbar\n\t"
: : "r"(val), "r"(addr):"memory");
}
static inline void _insw_ns(volatile uint16_t * port, void *buf, int ns)
{
uint16_t *b = (uint16_t *) buf;
while (ns > 0) {
*b++ = in_le16(port);
ns--;
}
}
static inline void _outsw_ns(volatile uint16_t * port, const void *buf,
int ns)
{
uint16_t *b = (uint16_t *) buf;
while (ns > 0) {
out_le16(port, *b++);
ns--;
}
}
static inline void _insw(volatile uint16_t * port, void *buf, int ns)
{
uint16_t *b = (uint16_t *) buf;
while (ns > 0) {
*b++ = in_be16(port);
ns--;
}
}
static inline void _outsw(volatile uint16_t * port, const void *buf,
int ns)
{
uint16_t *b = (uint16_t *) buf;
while (ns > 0) {
out_be16(port, *b++);
ns--;
}
}
#else /* BOOTSTRAP */
#ifdef FCOMPILER
#define inb(reg) ((u8)0xff)
#define inw(reg) ((u16)0xffff)
#define inl(reg) ((u32)0xffffffff)
#define outb(reg, val) do{} while(0)
#define outw(reg, val) do{} while(0)
#define outl(reg, val) do{} while(0)
#else
extern u8 inb(u32 reg);
extern u16 inw(u32 reg);
extern u32 inl(u32 reg);
extern void insw(u32 reg, void *addr, unsigned long count);
extern void outb(u32 reg, u8 val);
extern void outw(u32 reg, u16 val);
extern void outl(u32 reg, u32 val);
extern void outsw(u32 reg, const void *addr, unsigned long count);
#endif
#endif
#endif /* _ASM_IO_H */
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