201 lines
4.9 KiB
C
201 lines
4.9 KiB
C
#ifndef _ASM_IO_H
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#define _ASM_IO_H
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#include "asm/types.h"
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extern unsigned int va_shift; // Set in entry.S
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// Defined in ldscript
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extern char _start, _data, _stack, _estack, _end, _vmem, _evmem, _iomem;
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// XXX check use and merge
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#define phys_to_virt(phys) ((void *) ((unsigned long) (phys)))
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#define virt_to_phys(virt) ((unsigned long) (virt))
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#ifndef BOOTSTRAP
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#ifndef _IO_BASE
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#define _IO_BASE 0
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#endif
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/*
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* The insw/outsw/insl/outsl macros don't do byte-swapping.
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* They are only used in practice for transferring buffers which
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* are arrays of bytes, and byte-swapping is not appropriate in
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* that case. - paulus
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*/
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#define insw(port, buf, ns) _insw_ns((uint16_t *)((port)+_IO_BASE), (buf), (ns))
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#define outsw(port, buf, ns) _outsw_ns((uint16_t *)((port)+_IO_BASE), (buf), (ns))
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#define inb(port) in_8((uint8_t *)((port)+_IO_BASE))
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#define outb(val, port) out_8((uint8_t *)((port)+_IO_BASE), (val))
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#define inw(port) in_le16((uint16_t *)((port)+_IO_BASE))
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#define outw(val, port) out_le16((uint16_t *)((port)+_IO_BASE), (val))
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#define inl(port) in_le32((uint32_t *)((port)+_IO_BASE))
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#define outl(val, port) out_le32((uint32_t *)((port)+_IO_BASE), (val))
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/*
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* 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
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*/
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static inline int in_8(volatile unsigned char *addr)
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{
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int ret;
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__asm__ __volatile__("ldub [%1], %0\n\t"
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"stbar\n\t"
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:"=r"(ret):"r"(addr):"memory");
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return ret;
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}
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static inline void out_8(volatile unsigned char *addr, int val)
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{
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__asm__ __volatile__("stb %0, [%1]\n\t"
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"stbar\n\t"
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: : "r"(val), "r"(addr):"memory");
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}
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static inline int in_le16(volatile unsigned short *addr)
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{
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int ret;
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// XXX
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__asm__ __volatile__("lduh [%1], %0\n\t"
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"stbar\n\t"
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:"=r"(ret):"r"(addr):"memory");
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return ret;
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}
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static inline int in_be16(volatile unsigned short *addr)
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{
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int ret;
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__asm__ __volatile__("lduh [%1], %0\n\t"
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"stbar\n\t"
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:"=r"(ret):"r"(addr):"memory");
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return ret;
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}
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static inline void out_le16(volatile unsigned short *addr, int val)
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{
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// XXX
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__asm__ __volatile__("sth %0, [%1]\n\t"
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"stbar\n\t"
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: : "r"(val), "r"(addr):"memory");
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}
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static inline void out_be16(volatile unsigned short *addr, int val)
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{
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__asm__ __volatile__("sth %0, [%1]\n\t"
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"stbar\n\t"
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: : "r"(val), "r"(addr):"memory");
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}
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static inline unsigned in_le32(volatile unsigned *addr)
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{
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unsigned ret;
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// XXX
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__asm__ __volatile__("ld [%1], %0\n\t"
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"stbar\n\t"
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:"=r"(ret):"r"(addr):"memory");
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return ret;
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}
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static inline unsigned in_be32(volatile unsigned *addr)
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{
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unsigned ret;
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__asm__ __volatile__("ld [%1], %0\n\t"
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"stbar\n\t"
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:"=r"(ret):"r"(addr):"memory");
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return ret;
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}
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static inline void out_le32(volatile unsigned *addr, int val)
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{
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// XXX
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__asm__ __volatile__("st %0, [%1]\n\t"
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"stbar\n\t"
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: : "r"(val), "r"(addr):"memory");
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}
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static inline void out_be32(volatile unsigned *addr, int val)
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{
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__asm__ __volatile__("st %0, [%1]\n\t"
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"stbar\n\t"
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: : "r"(val), "r"(addr):"memory");
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}
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static inline void _insw_ns(volatile uint16_t * port, void *buf, int ns)
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{
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uint16_t *b = (uint16_t *) buf;
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while (ns > 0) {
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*b++ = in_le16(port);
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ns--;
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}
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}
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static inline void _outsw_ns(volatile uint16_t * port, const void *buf,
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int ns)
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{
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uint16_t *b = (uint16_t *) buf;
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while (ns > 0) {
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out_le16(port, *b++);
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ns--;
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}
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}
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static inline void _insw(volatile uint16_t * port, void *buf, int ns)
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{
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uint16_t *b = (uint16_t *) buf;
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while (ns > 0) {
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*b++ = in_be16(port);
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ns--;
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}
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}
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static inline void _outsw(volatile uint16_t * port, const void *buf,
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int ns)
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{
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uint16_t *b = (uint16_t *) buf;
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while (ns > 0) {
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out_be16(port, *b++);
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ns--;
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}
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}
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#else /* BOOTSTRAP */
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#ifdef FCOMPILER
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#define inb(reg) ((u8)0xff)
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#define inw(reg) ((u16)0xffff)
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#define inl(reg) ((u32)0xffffffff)
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#define outb(reg, val) do{} while(0)
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#define outw(reg, val) do{} while(0)
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#define outl(reg, val) do{} while(0)
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#else
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extern u8 inb(u32 reg);
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extern u16 inw(u32 reg);
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extern u32 inl(u32 reg);
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extern void insw(u32 reg, void *addr, unsigned long count);
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extern void outb(u32 reg, u8 val);
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extern void outw(u32 reg, u16 val);
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extern void outl(u32 reg, u32 val);
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extern void outsw(u32 reg, const void *addr, unsigned long count);
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#endif
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#endif
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#if defined(CONFIG_QEMU)
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#define FW_CFG_ARCH_DEPTH (FW_CFG_ARCH_LOCAL + 0x00)
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#define FW_CFG_ARCH_WIDTH (FW_CFG_ARCH_LOCAL + 0x01)
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#define FW_CFG_ARCH_HEIGHT (FW_CFG_ARCH_LOCAL + 0x02)
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#endif
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#endif /* _ASM_IO_H */
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