![Al Viro](/assets/img/avatar_default.png)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
567 lines
15 KiB
C
567 lines
15 KiB
C
#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(const 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(const 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(const 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(const 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(const 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(const 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(const volatile void __iomem *addr)
|
|
{
|
|
return *(__force volatile __u16 *)(addr);
|
|
}
|
|
static inline __u32 readl(const 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(const volatile void __iomem *addr)
|
|
{
|
|
return in_le16(addr);
|
|
}
|
|
static inline __u32 readl(const 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__ */
|