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cfef84a007
- These calls clash with the Linux IO header in LibBSD. Making these conditional here means BSPs build and the imported Linux header is untouched. Updates #4245
148 lines
3.7 KiB
C
148 lines
3.7 KiB
C
/*
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* io.h
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*
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* This file contains inline implementation of function to
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* deal with IO.
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*
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* It is a stripped down version of linux ppc file...
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*
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* Copyright (C) 1999 Eric Valette (valette@crf.canon.fr)
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* Canon Centre Recherche France.
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#ifndef _LIBCPU_IO_H
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#define _LIBCPU_IO_H
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#define PREP_ISA_IO_BASE 0x80000000
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#define PREP_ISA_MEM_BASE 0xc0000000
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#define PREP_PCI_DRAM_OFFSET 0x80000000
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#define CHRP_ISA_IO_BASE 0xfe000000
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#define CHRP_ISA_MEM_BASE 0xfd000000
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#define CHRP_PCI_DRAM_OFFSET 0x00000000
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/* _IO_BASE, _ISA_MEM_BASE, PCI_DRAM_OFFSET are now defined by bsp.h */
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#ifndef ASM
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#include <bsp.h> /* for _IO_BASE & friends */
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#include <stdint.h>
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/* NOTE: The use of these macros is DISCOURAGED.
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* you should consider e.g. using in_xxx / out_xxx
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* with a device specific base address that is
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* defined by the BSP. This makes drivers easier
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* to port.
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*/
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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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* Enforce In-order Execution of I/O:
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* Acts as a barrier to ensure all previous I/O accesses have
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* completed before any further ones are issued.
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*/
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static inline void io_eieio(void)
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{
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__asm__ __volatile__ ("eieio");
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}
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/* Enforce in-order execution of data I/O.
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* No distinction between read/write on PPC; use eieio for all three.
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*/
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#define iobarrier_rw() io_eieio()
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#define iobarrier_r() io_eieio()
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#define iobarrier_w() io_eieio()
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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 uint8_t in_8(const volatile uint8_t *addr)
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{
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uint8_t ret;
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__asm__ __volatile__("lbz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
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return ret;
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}
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static inline void out_8(volatile uint8_t *addr, uint8_t val)
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{
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__asm__ __volatile__("stb%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
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}
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static inline uint16_t in_le16(const volatile uint16_t *addr)
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{
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uint16_t ret;
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__asm__ __volatile__("lhbrx %0,0,%1; eieio" : "=r" (ret) :
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"r" (addr), "m" (*addr));
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return ret;
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}
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static inline uint16_t in_be16(const volatile uint16_t *addr)
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{
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uint16_t ret;
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__asm__ __volatile__("lhz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
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return ret;
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}
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static inline void out_le16(volatile uint16_t *addr, uint16_t val)
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{
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__asm__ __volatile__("sthbrx %1,0,%2; eieio" : "=m" (*addr) :
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"r" (val), "r" (addr));
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}
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static inline void out_be16(volatile uint16_t *addr, uint16_t val)
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{
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__asm__ __volatile__("sth%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
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}
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#ifndef in_le32
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static inline uint32_t in_le32(const volatile uint32_t *addr)
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{
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uint32_t ret;
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__asm__ __volatile__("lwbrx %0,0,%1; eieio" : "=r" (ret) :
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"r" (addr), "m" (*addr));
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return ret;
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}
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#endif
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#ifndef in_be32
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static inline uint32_t in_be32(const volatile uint32_t *addr)
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{
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uint32_t ret;
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__asm__ __volatile__("lwz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
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return ret;
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}
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#endif
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#ifndef out_le32
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static inline void out_le32(volatile uint32_t *addr, uint32_t val)
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{
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__asm__ __volatile__("stwbrx %1,0,%2; eieio" : "=m" (*addr) :
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"r" (val), "r" (addr));
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}
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#endif
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#ifndef out_be32
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static inline void out_be32(volatile uint32_t *addr, uint32_t val)
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{
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__asm__ __volatile__("stw%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
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}
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#endif
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#endif /* ASM */
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#endif /* _LIBCPU_IO_H */
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