diff options
Diffstat (limited to 'include/asm-ppc/io.h')
| -rw-r--r-- | include/asm-ppc/io.h | 566 |
1 files changed, 566 insertions, 0 deletions
diff --git a/include/asm-ppc/io.h b/include/asm-ppc/io.h new file mode 100644 index 000000000000..7eb7cf6360bd --- /dev/null +++ b/include/asm-ppc/io.h @@ -0,0 +1,566 @@ +#ifdef __KERNEL__ +#ifndef _PPC_IO_H +#define _PPC_IO_H + +#include <linux/config.h> +#include <linux/string.h> +#include <linux/types.h> + +#include <asm/page.h> +#include <asm/byteorder.h> +#include <asm/mmu.h> + +#define SIO_CONFIG_RA 0x398 +#define SIO_CONFIG_RD 0x399 + +#define SLOW_DOWN_IO + +#define PMAC_ISA_MEM_BASE 0 +#define PMAC_PCI_DRAM_OFFSET 0 +#define CHRP_ISA_IO_BASE 0xf8000000 +#define CHRP_ISA_MEM_BASE 0xf7000000 +#define CHRP_PCI_DRAM_OFFSET 0 +#define PREP_ISA_IO_BASE 0x80000000 +#define PREP_ISA_MEM_BASE 0xc0000000 +#define PREP_PCI_DRAM_OFFSET 0x80000000 + +#if defined(CONFIG_4xx) +#include <asm/ibm4xx.h> +#elif defined(CONFIG_8xx) +#include <asm/mpc8xx.h> +#elif defined(CONFIG_8260) +#include <asm/mpc8260.h> +#elif defined(CONFIG_83xx) +#include <asm/mpc83xx.h> +#elif defined(CONFIG_85xx) +#include <asm/mpc85xx.h> +#elif defined(CONFIG_APUS) +#define _IO_BASE 0 +#define _ISA_MEM_BASE 0 +#define PCI_DRAM_OFFSET 0 +#else /* Everyone else */ +#define _IO_BASE isa_io_base +#define _ISA_MEM_BASE isa_mem_base +#define PCI_DRAM_OFFSET pci_dram_offset +#endif /* Platform-dependent I/O */ + +#define ___IO_BASE ((void __iomem *)_IO_BASE) +extern unsigned long isa_io_base; +extern unsigned long isa_mem_base; +extern unsigned long pci_dram_offset; + +/* + * 8, 16 and 32 bit, big and little endian I/O operations, with barrier. + * + * Read operations have additional twi & isync to make sure the read + * is actually performed (i.e. the data has come back) before we start + * executing any following instructions. + */ +extern inline int in_8(volatile unsigned char __iomem *addr) +{ + int ret; + + __asm__ __volatile__( + "lbz%U1%X1 %0,%1;\n" + "twi 0,%0,0;\n" + "isync" : "=r" (ret) : "m" (*addr)); + return ret; +} + +extern inline void out_8(volatile unsigned char __iomem *addr, int val) +{ + __asm__ __volatile__("stb%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val)); +} + +extern inline int in_le16(volatile unsigned short __iomem *addr) +{ + int ret; + + __asm__ __volatile__("lhbrx %0,0,%1;\n" + "twi 0,%0,0;\n" + "isync" : "=r" (ret) : + "r" (addr), "m" (*addr)); + return ret; +} + +extern inline int in_be16(volatile unsigned short __iomem *addr) +{ + int ret; + + __asm__ __volatile__("lhz%U1%X1 %0,%1;\n" + "twi 0,%0,0;\n" + "isync" : "=r" (ret) : "m" (*addr)); + return ret; +} + +extern inline void out_le16(volatile unsigned short __iomem *addr, int val) +{ + __asm__ __volatile__("sthbrx %1,0,%2; eieio" : "=m" (*addr) : + "r" (val), "r" (addr)); +} + +extern inline void out_be16(volatile unsigned short __iomem *addr, int val) +{ + __asm__ __volatile__("sth%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val)); +} + +extern inline unsigned in_le32(volatile unsigned __iomem *addr) +{ + unsigned ret; + + __asm__ __volatile__("lwbrx %0,0,%1;\n" + "twi 0,%0,0;\n" + "isync" : "=r" (ret) : + "r" (addr), "m" (*addr)); + return ret; +} + +extern inline unsigned in_be32(volatile unsigned __iomem *addr) +{ + unsigned ret; + + __asm__ __volatile__("lwz%U1%X1 %0,%1;\n" + "twi 0,%0,0;\n" + "isync" : "=r" (ret) : "m" (*addr)); + return ret; +} + +extern inline void out_le32(volatile unsigned __iomem *addr, int val) +{ + __asm__ __volatile__("stwbrx %1,0,%2; eieio" : "=m" (*addr) : + "r" (val), "r" (addr)); +} + +extern inline void out_be32(volatile unsigned __iomem *addr, int val) +{ + __asm__ __volatile__("stw%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val)); +} +#if defined (CONFIG_8260_PCI9) +#define readb(addr) in_8((volatile u8 *)(addr)) +#define writeb(b,addr) out_8((volatile u8 *)(addr), (b)) +#else +static inline __u8 readb(volatile void __iomem *addr) +{ + return in_8(addr); +} +static inline void writeb(__u8 b, volatile void __iomem *addr) +{ + out_8(addr, b); +} +#endif + +#if defined(CONFIG_APUS) +static inline __u16 readw(volatile void __iomem *addr) +{ + return *(__force volatile __u16 *)(addr); +} +static inline __u32 readl(volatile void __iomem *addr) +{ + return *(__force volatile __u32 *)(addr); +} +static inline void writew(__u16 b, volatile void __iomem *addr) +{ + *(__force volatile __u16 *)(addr) = b; +} +static inline void writel(__u32 b, volatile void __iomem *addr) +{ + *(__force volatile __u32 *)(addr) = b; +} +#elif defined (CONFIG_8260_PCI9) +/* Use macros if PCI9 workaround enabled */ +#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)) +#else +static inline __u16 readw(volatile void __iomem *addr) +{ + return in_le16(addr); +} +static inline __u32 readl(volatile void __iomem *addr) +{ + return in_le32(addr); +} +static inline void writew(__u16 b, volatile void __iomem *addr) +{ + out_le16(addr, b); +} +static inline void writel(__u32 b, volatile void __iomem *addr) +{ + out_le32(addr, b); +} +#endif /* CONFIG_APUS */ + +#define readb_relaxed(addr) readb(addr) +#define readw_relaxed(addr) readw(addr) +#define readl_relaxed(addr) readl(addr) + +static inline __u8 __raw_readb(const volatile void __iomem *addr) +{ + return *(__force volatile __u8 *)(addr); +} +static inline __u16 __raw_readw(const volatile void __iomem *addr) +{ + return *(__force volatile __u16 *)(addr); +} +static inline __u32 __raw_readl(const volatile void __iomem *addr) +{ + return *(__force volatile __u32 *)(addr); +} +static inline void __raw_writeb(__u8 b, volatile void __iomem *addr) +{ + *(__force volatile __u8 *)(addr) = b; +} +static inline void __raw_writew(__u16 b, volatile void __iomem *addr) +{ + *(__force volatile __u16 *)(addr) = b; +} +static inline void __raw_writel(__u32 b, volatile void __iomem *addr) +{ + *(__force volatile __u32 *)(addr) = b; +} + +#define mmiowb() + +/* + * 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((port)+___IO_BASE, (buf), (ns)) +#define outsb(port, buf, ns) _outsb((port)+___IO_BASE, (buf), (ns)) +#define insw(port, buf, ns) _insw_ns((port)+___IO_BASE, (buf), (ns)) +#define outsw(port, buf, ns) _outsw_ns((port)+___IO_BASE, (buf), (ns)) +#define insl(port, buf, nl) _insl_ns((port)+___IO_BASE, (buf), (nl)) +#define outsl(port, buf, nl) _outsl_ns((port)+___IO_BASE, (buf), (nl)) + +/* + * On powermacs, we will get a machine check exception if we + * try to read data from a non-existent I/O port. Because the + * machine check is an asynchronous exception, it isn't + * well-defined which instruction SRR0 will point to when the + * exception occurs. + * With the sequence below (twi; isync; nop), we have found that + * the machine check occurs on one of the three instructions on + * all PPC implementations tested so far. The twi and isync are + * needed on the 601 (in fact twi; sync works too), the isync and + * nop are needed on 604[e|r], and any of twi, sync or isync will + * work on 603[e], 750, 74xx. + * The twi creates an explicit data dependency on the returned + * value which seems to be needed to make the 601 wait for the + * load to finish. + */ + +#define __do_in_asm(name, op) \ +extern __inline__ unsigned int name(unsigned int port) \ +{ \ + unsigned int x; \ + __asm__ __volatile__( \ + op " %0,0,%1\n" \ + "1: twi 0,%0,0\n" \ + "2: isync\n" \ + "3: nop\n" \ + "4:\n" \ + ".section .fixup,\"ax\"\n" \ + "5: li %0,-1\n" \ + " b 4b\n" \ + ".previous\n" \ + ".section __ex_table,\"a\"\n" \ + " .align 2\n" \ + " .long 1b,5b\n" \ + " .long 2b,5b\n" \ + " .long 3b,5b\n" \ + ".previous" \ + : "=&r" (x) \ + : "r" (port + ___IO_BASE)); \ + return x; \ +} + +#define __do_out_asm(name, op) \ +extern __inline__ void name(unsigned int val, unsigned int port) \ +{ \ + __asm__ __volatile__( \ + op " %0,0,%1\n" \ + "1: sync\n" \ + "2:\n" \ + ".section __ex_table,\"a\"\n" \ + " .align 2\n" \ + " .long 1b,2b\n" \ + ".previous" \ + : : "r" (val), "r" (port + ___IO_BASE)); \ +} + +__do_out_asm(outb, "stbx") +#ifdef CONFIG_APUS +__do_in_asm(inb, "lbzx") +__do_in_asm(inw, "lhz%U1%X1") +__do_in_asm(inl, "lwz%U1%X1") +__do_out_asm(outl,"stw%U0%X0") +__do_out_asm(outw, "sth%U0%X0") +#elif defined (CONFIG_8260_PCI9) +/* in asm cannot be defined if PCI9 workaround is used */ +#define inb(port) in_8((port)+___IO_BASE) +#define inw(port) in_le16((port)+___IO_BASE) +#define inl(port) in_le32((port)+___IO_BASE) +__do_out_asm(outw, "sthbrx") +__do_out_asm(outl, "stwbrx") +#else +__do_in_asm(inb, "lbzx") +__do_in_asm(inw, "lhbrx") +__do_in_asm(inl, "lwbrx") +__do_out_asm(outw, "sthbrx") +__do_out_asm(outl, "stwbrx") + +#endif + +#define inb_p(port) inb((port)) +#define outb_p(val, port) outb((val), (port)) +#define inw_p(port) inw((port)) +#define outw_p(val, port) outw((val), (port)) +#define inl_p(port) inl((port)) +#define outl_p(val, port) outl((val), (port)) + +extern void _insb(volatile u8 __iomem *port, void *buf, int ns); +extern void _outsb(volatile u8 __iomem *port, const void *buf, int ns); +extern void _insw(volatile u16 __iomem *port, void *buf, int ns); +extern void _outsw(volatile u16 __iomem *port, const void *buf, int ns); +extern void _insl(volatile u32 __iomem *port, void *buf, int nl); +extern void _outsl(volatile u32 __iomem *port, const void *buf, int nl); +extern void _insw_ns(volatile u16 __iomem *port, void *buf, int ns); +extern void _outsw_ns(volatile u16 __iomem *port, const void *buf, int ns); +extern void _insl_ns(volatile u32 __iomem *port, void *buf, int nl); +extern void _outsl_ns(volatile u32 __iomem *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((port)+___IO_BASE, (buf), (ns)) +#define outsw_ns(port, buf, ns) _outsw_ns((port)+___IO_BASE, (buf), (ns)) +#define insl_ns(port, buf, nl) _insl_ns((port)+___IO_BASE, (buf), (nl)) +#define outsl_ns(port, buf, nl) _outsl_ns((port)+___IO_BASE, (buf), (nl)) + + +#define IO_SPACE_LIMIT ~0 + +#if defined (CONFIG_8260_PCI9) +#define memset_io(a,b,c) memset((void *)(a),(b),(c)) +#define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c)) +#define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c)) +#else +static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count) +{ + memset((void __force *)addr, val, count); +} +static inline void memcpy_fromio(void *dst,const volatile void __iomem *src, int count) +{ + memcpy(dst, (void __force *) src, count); +} +static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count) +{ + memcpy((void __force *) dst, src, count); +} +#endif + +#define eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(void __force *)(void __iomem *)(b),(c),(d)) + +/* + * Map in an area of physical address space, for accessing + * I/O devices etc. + */ +extern void __iomem *__ioremap(phys_addr_t address, unsigned long size, + unsigned long flags); +extern void __iomem *ioremap(phys_addr_t address, unsigned long size); +#ifdef CONFIG_44x +extern void __iomem *ioremap64(unsigned long long address, unsigned long size); +#endif +#define ioremap_nocache(addr, size) ioremap((addr), (size)) +extern void iounmap(volatile void __iomem *addr); +extern unsigned long iopa(unsigned long addr); +extern unsigned long mm_ptov(unsigned long addr) __attribute_const__; +extern void io_block_mapping(unsigned long virt, phys_addr_t phys, + unsigned int size, int flags); + +/* + * The PCI bus is inherently Little-Endian. The PowerPC is being + * run Big-Endian. Thus all values which cross the [PCI] barrier + * must be endian-adjusted. Also, the local DRAM has a different + * address from the PCI point of view, thus buffer addresses also + * have to be modified [mapped] appropriately. + */ +extern inline unsigned long virt_to_bus(volatile void * address) +{ +#ifndef CONFIG_APUS + if (address == (void *)0) + return 0; + return (unsigned long)address - KERNELBASE + PCI_DRAM_OFFSET; +#else + return iopa ((unsigned long) address); +#endif +} + +extern inline void * bus_to_virt(unsigned long address) +{ +#ifndef CONFIG_APUS + if (address == 0) + return NULL; + return (void *)(address - PCI_DRAM_OFFSET + KERNELBASE); +#else + return (void*) mm_ptov (address); +#endif +} + +/* + * Change virtual addresses to physical addresses and vv, for + * addresses in the area where the kernel has the RAM mapped. + */ +extern inline unsigned long virt_to_phys(volatile void * address) +{ +#ifndef CONFIG_APUS + return (unsigned long) address - KERNELBASE; +#else + return iopa ((unsigned long) address); +#endif +} + +extern inline void * phys_to_virt(unsigned long address) +{ +#ifndef CONFIG_APUS + return (void *) (address + KERNELBASE); +#else + return (void*) mm_ptov (address); +#endif +} + +/* + * Change "struct page" to physical address. + */ +#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) +#define page_to_bus(page) (page_to_phys(page) + PCI_DRAM_OFFSET) + +/* + * 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. + */ +extern inline void eieio(void) +{ + __asm__ __volatile__ ("eieio" : : : "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() + +static inline int check_signature(volatile void __iomem * io_addr, + const unsigned char *signature, int length) +{ + int retval = 0; + do { + if (readb(io_addr) != *signature) + goto out; + io_addr++; + signature++; + length--; + } while (length); + retval = 1; +out: + return retval; +} + +/* + * Here comes the ppc implementation of the IOMAP + * interfaces. + */ +static inline unsigned int ioread8(void __iomem *addr) +{ + return readb(addr); +} + +static inline unsigned int ioread16(void __iomem *addr) +{ + return readw(addr); +} + +static inline unsigned int ioread32(void __iomem *addr) +{ + return readl(addr); +} + +static inline void iowrite8(u8 val, void __iomem *addr) +{ + writeb(val, addr); +} + +static inline void iowrite16(u16 val, void __iomem *addr) +{ + writew(val, addr); +} + +static inline void iowrite32(u32 val, void __iomem *addr) +{ + writel(val, addr); +} + +static inline void ioread8_rep(void __iomem *addr, void *dst, unsigned long count) +{ + _insb(addr, dst, count); +} + +static inline void ioread16_rep(void __iomem *addr, void *dst, unsigned long count) +{ + _insw_ns(addr, dst, count); +} + +static inline void ioread32_rep(void __iomem *addr, void *dst, unsigned long count) +{ + _insl_ns(addr, dst, count); +} + +static inline void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count) +{ + _outsb(addr, src, count); +} + +static inline void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count) +{ + _outsw_ns(addr, src, count); +} + +static inline void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count) +{ + _outsl_ns(addr, src, count); +} + +/* Create a virtual mapping cookie for an IO port range */ +extern void __iomem *ioport_map(unsigned long port, unsigned int nr); +extern void ioport_unmap(void __iomem *); + +/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ +struct pci_dev; +extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max); +extern void pci_iounmap(struct pci_dev *dev, void __iomem *); + +#endif /* _PPC_IO_H */ + +#ifdef CONFIG_8260_PCI9 +#include <asm/mpc8260_pci9.h> +#endif + +/* + * 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 /* __KERNEL__ */ |