diff options
Diffstat (limited to 'arch/powerpc/include/asm/io.h')
| -rw-r--r-- | arch/powerpc/include/asm/io.h | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h new file mode 100644 index 0000000000..88f14b54f4 --- /dev/null +++ b/arch/powerpc/include/asm/io.h @@ -0,0 +1,257 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +/* originally from linux source. + * removed the dependencies on CONFIG_ values + * removed virt_to_phys stuff (and in fact everything surrounded by #if __KERNEL__) + * Modified By Rob Taylor, Flying Pig Systems, 2000 + */ + +#ifndef _PPC_IO_H +#define _PPC_IO_H + +#include <asm/byteorder.h> + +#define SIO_CONFIG_RA 0x398 +#define SIO_CONFIG_RD 0x399 + +#define _IO_BASE 0 + +#define readb(addr) in_8((volatile u8 *)(addr)) +#define writeb(b,addr) out_8((volatile u8 *)(addr), (b)) +#if !defined(__BIG_ENDIAN) +#define readw(addr) (*(volatile u16 *) (addr)) +#define readl(addr) (*(volatile u32 *) (addr)) +#define writew(b,addr) ((*(volatile u16 *) (addr)) = (b)) +#define writel(b,addr) ((*(volatile u32 *) (addr)) = (b)) +#else +#define readw(addr) in_le16((volatile u16 *)(addr)) +#define readl(addr) in_le32((volatile u32 *)(addr)) +#define writew(b,addr) out_le16((volatile u16 *)(addr),(b)) +#define writel(b,addr) out_le32((volatile u32 *)(addr),(b)) +#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 insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns)) +#define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns)) +#define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) +#define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) +#define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) +#define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) + +#define inb(port) in_8((u8 *)((port)+_IO_BASE)) +#define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val)) +#if !defined(__BIG_ENDIAN) +#define inw(port) in_be16((u16 *)((port)+_IO_BASE)) +#define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val)) +#define inl(port) in_be32((u32 *)((port)+_IO_BASE)) +#define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val)) +#else +#define inw(port) in_le16((u16 *)((port)+_IO_BASE)) +#define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val)) +#define inl(port) in_le32((u32 *)((port)+_IO_BASE)) +#define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val)) +#endif + +#define inb_p(port) in_8((u8 *)((port)+_IO_BASE)) +#define outb_p(val, port) out_8((u8 *)((port)+_IO_BASE), (val)) +#define inw_p(port) in_le16((u16 *)((port)+_IO_BASE)) +#define outw_p(val, port) out_le16((u16 *)((port)+_IO_BASE), (val)) +#define inl_p(port) in_le32((u32 *)((port)+_IO_BASE)) +#define outl_p(val, port) out_le32((u32 *)((port)+_IO_BASE), (val)) + +extern void _insb(volatile u8 *port, void *buf, int ns); +extern void _outsb(volatile u8 *port, const void *buf, int ns); +extern void _insw(volatile u16 *port, void *buf, int ns); +extern void _outsw(volatile u16 *port, const void *buf, int ns); +extern void _insl(volatile u32 *port, void *buf, int nl); +extern void _outsl(volatile u32 *port, const void *buf, int nl); +extern void _insw_ns(volatile u16 *port, void *buf, int ns); +extern void _outsw_ns(volatile u16 *port, const void *buf, int ns); +extern void _insl_ns(volatile u32 *port, void *buf, int nl); +extern void _outsl_ns(volatile u32 *port, const void *buf, int nl); + +/* + * The *_ns versions below don't do byte-swapping. + * Neither do the standard versions now, these are just here + * for older code. + */ +#define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) +#define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) +#define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) +#define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) + + +#define IO_SPACE_LIMIT ~0 + +/* + * Enforce In-order Execution of I/O: + * Acts as a barrier to ensure all previous I/O accesses have + * completed before any further ones are issued. + */ +#define eieio() __asm__ __volatile__ ("eieio" : : : "memory"); +#define sync() __asm__ __volatile__ ("sync" : : : "memory"); + +/* Enforce in-order execution of data I/O. + * No distinction between read/write on PPC; use eieio for all three. + */ +#define iobarrier_rw() eieio() +#define iobarrier_r() eieio() +#define iobarrier_w() eieio() + +/* + * Non ordered and non-swapping "raw" accessors + */ +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 void __raw_writeb(unsigned char v, volatile void __iomem *addr) +{ + *(volatile unsigned char __force *)(addr) = v; +} +static inline void __raw_writew(unsigned short v, volatile void __iomem *addr) +{ + *(volatile unsigned short __force *)(addr) = v; +} +static inline void __raw_writel(unsigned int v, volatile void __iomem *addr) +{ + *(volatile unsigned int __force *)(addr) = v; +} + +/* + * 8, 16 and 32 bit, big and little endian I/O operations, with barrier. + */ +#define in_8 in_8 +static inline u8 in_8(const volatile u8 __iomem *addr) +{ + u8 ret; + + __asm__ __volatile__("sync; lbz%U1%X1 %0,%1; twi 0,%0,0; isync" + : "=r" (ret) : "m" (*addr)); + return ret; +} + +#define out_8 out_8 +static inline void out_8(volatile u8 __iomem *addr, u8 val) +{ + __asm__ __volatile__("sync;stb%U0%X0 %1,%0" : "=m" (*addr) : "r" (val)); +} + +#define in_le16 in_le16 +static inline u16 in_le16(const volatile u16 __iomem *addr) +{ + u16 ret; + + __asm__ __volatile__("sync; lhbrx %0,0,%1; twi 0,%0,0; isync" + : "=r" (ret) : "r" (addr), "m" (*addr)); + return ret; +} + +#define in_be16 in_be16 +static inline u16 in_be16(const volatile u16 __iomem *addr) +{ + u16 ret; + + __asm__ __volatile__("sync; lhz%U1%X1 %0,%1; twi 0,%0,0; isync" + : "=r" (ret) : "m" (*addr)); + return ret; +} + +#define out_le16 out_le16 +static inline void out_le16(volatile u16 __iomem *addr, u16 val) +{ + __asm__ __volatile__("sync; sthbrx %1,0,%2" + : "=m" (*addr) : "r" (val), "r" (addr)); +} + +#define out_be16 out_be16 +static inline void out_be16(volatile u16 __iomem *addr, u16 val) +{ + __asm__ __volatile__("sync;sth%U0%X0 %1,%0" : "=m" (*addr) : "r" (val)); +} + +#define in_le32 in_le32 +static inline u32 in_le32(const volatile u32 __iomem *addr) +{ + u32 ret; + + __asm__ __volatile__("sync; lwbrx %0,0,%1; twi 0,%0,0; isync" + : "=r" (ret) : "r" (addr), "m" (*addr)); + return ret; +} + +#define in_be32 in_be32 +static inline u32 in_be32(const volatile u32 __iomem *addr) +{ + u32 ret; + + __asm__ __volatile__("sync; lwz%U1%X1 %0,%1; twi 0,%0,0; isync" + : "=r" (ret) : "m" (*addr)); + return ret; +} + +#define out_le32 out_le32 +static inline void out_le32(volatile u32 __iomem *addr, u32 val) +{ + __asm__ __volatile__("sync; stwbrx %1,0,%2" + : "=m" (*addr) : "r" (val), "r" (addr)); +} + +#define out_be32 out_be32 +static inline void out_be32(volatile u32 __iomem *addr, u32 val) +{ + __asm__ __volatile__("sync;stw%U0%X0 %1,%0" : "=m" (*addr) : "r" (val)); +} + +/* + * Clear and set bits in one shot. These macros can be used to clear and + * set multiple bits in a register using a single call. These macros can + * also be used to set a multiple-bit bit pattern using a mask, by + * specifying the mask in the 'clear' parameter and the new bit pattern + * in the 'set' parameter. + */ +#define clrbits(type, addr, clear) \ + out_##type((addr), in_##type(addr) & ~(clear)) + +#define setbits(type, addr, set) \ + out_##type((addr), in_##type(addr) | (set)) + +#define clrsetbits(type, addr, clear, set) \ + out_##type((addr), (in_##type(addr) & ~(clear)) | (set)) + +#define clrbits_be32(addr, clear) clrbits(be32, addr, clear) +#define setbits_be32(addr, set) setbits(be32, addr, set) +#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set) + +/* these ones were originally in config.h */ +unsigned char in8(unsigned int); +void out8(unsigned int, unsigned char); +unsigned short in16(unsigned int); +unsigned short in16r(unsigned int); +void out16(unsigned int, unsigned short value); +void out16r(unsigned int, unsigned short value); +unsigned long in32(unsigned int); +unsigned long in32r(unsigned int); +void out32(unsigned int, unsigned long value); +void out32r(unsigned int, unsigned long value); +void ppcDcbf(unsigned long value); +void ppcDcbi(unsigned long value); +void ppcSync(void); +void ppcDcbz(unsigned long value); + +#include <asm-generic/io.h> + +#endif |