kernel-ark/include/asm-arm/arch-ixp4xx/io.h
John Bowler bfca94590b [ARM] 3083/1: include/asm-arm/arch-ixp4xx/io.h: eliminate warnings for pointer passed to integral function argument
Patch from John Bowler

Fix for a compiler warning, this wasn't apparent in 2.6.12, I
believe the compiler options have been changed (somewhere) so
that passing a (void*) to a (u32) argument is now warned.

This accounts for the majority of the warnings in my builds of
the 2.6.14 kernel for NSLU2.

The patch changes pointer parameters declared as u32 to be
declared as either, for read parameters:

const volatile void __iomem *

and for write parameters:

volatile void __iomem *

Signed-off-by: John Bowler <jbowler@acm.org>
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-02 11:55:12 +00:00

587 lines
14 KiB
C

/*
* linux/include/asm-arm/arch-ixp4xx/io.h
*
* Author: Deepak Saxena <dsaxena@plexity.net>
*
* Copyright (C) 2002-2005 MontaVista Software, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARM_ARCH_IO_H
#define __ASM_ARM_ARCH_IO_H
#include <asm/hardware.h>
#define IO_SPACE_LIMIT 0xffff0000
#define BIT(x) ((1)<<(x))
extern int (*ixp4xx_pci_read)(u32 addr, u32 cmd, u32* data);
extern int ixp4xx_pci_write(u32 addr, u32 cmd, u32 data);
/*
* IXP4xx provides two methods of accessing PCI memory space:
*
* 1) A direct mapped window from 0x48000000 to 0x4bffffff (64MB).
* To access PCI via this space, we simply ioremap() the BAR
* into the kernel and we can use the standard read[bwl]/write[bwl]
* macros. This is the preffered method due to speed but it
* limits the system to just 64MB of PCI memory. This can be
* problamatic if using video cards and other memory-heavy
* targets.
*
* 2) If > 64MB of memory space is required, the IXP4xx can be configured
* to use indirect registers to access PCI (as we do below for I/O
* transactions). This allows for up to 128MB (0x48000000 to 0x4fffffff)
* of memory on the bus. The disadvantadge of this is that every
* PCI access requires three local register accesses plus a spinlock,
* but in some cases the performance hit is acceptable. In addition,
* you cannot mmap() PCI devices in this case.
*
*/
#ifndef CONFIG_IXP4XX_INDIRECT_PCI
#define __mem_pci(a) (a)
#else
#include <linux/mm.h>
/*
* In the case of using indirect PCI, we simply return the actual PCI
* address and our read/write implementation use that to drive the
* access registers. If something outside of PCI is ioremap'd, we
* fallback to the default.
*/
static inline void __iomem *
__ixp4xx_ioremap(unsigned long addr, size_t size, unsigned long flags, unsigned long align)
{
extern void __iomem * __ioremap(unsigned long, size_t, unsigned long, unsigned long);
if((addr < 0x48000000) || (addr > 0x4fffffff))
return __ioremap(addr, size, flags, align);
return (void *)addr;
}
static inline void
__ixp4xx_iounmap(void __iomem *addr)
{
extern void __iounmap(void __iomem *addr);
if ((u32)addr >= VMALLOC_START)
__iounmap(addr);
}
#define __arch_ioremap(a, s, f, x) __ixp4xx_ioremap(a, s, f, x)
#define __arch_iounmap(a) __ixp4xx_iounmap(a)
#define writeb(v, p) __ixp4xx_writeb(v, p)
#define writew(v, p) __ixp4xx_writew(v, p)
#define writel(v, p) __ixp4xx_writel(v, p)
#define writesb(p, v, l) __ixp4xx_writesb(p, v, l)
#define writesw(p, v, l) __ixp4xx_writesw(p, v, l)
#define writesl(p, v, l) __ixp4xx_writesl(p, v, l)
#define readb(p) __ixp4xx_readb(p)
#define readw(p) __ixp4xx_readw(p)
#define readl(p) __ixp4xx_readl(p)
#define readsb(p, v, l) __ixp4xx_readsb(p, v, l)
#define readsw(p, v, l) __ixp4xx_readsw(p, v, l)
#define readsl(p, v, l) __ixp4xx_readsl(p, v, l)
static inline void
__ixp4xx_writeb(u8 value, volatile void __iomem *p)
{
u32 addr = (u32)p;
u32 n, byte_enables, data;
if (addr >= VMALLOC_START) {
__raw_writeb(value, addr);
return;
}
n = addr % 4;
byte_enables = (0xf & ~BIT(n)) << IXP4XX_PCI_NP_CBE_BESL;
data = value << (8*n);
ixp4xx_pci_write(addr, byte_enables | NP_CMD_MEMWRITE, data);
}
static inline void
__ixp4xx_writesb(volatile void __iomem *bus_addr, const u8 *vaddr, int count)
{
while (count--)
writeb(*vaddr++, bus_addr);
}
static inline void
__ixp4xx_writew(u16 value, volatile void __iomem *p)
{
u32 addr = (u32)p;
u32 n, byte_enables, data;
if (addr >= VMALLOC_START) {
__raw_writew(value, addr);
return;
}
n = addr % 4;
byte_enables = (0xf & ~(BIT(n) | BIT(n+1))) << IXP4XX_PCI_NP_CBE_BESL;
data = value << (8*n);
ixp4xx_pci_write(addr, byte_enables | NP_CMD_MEMWRITE, data);
}
static inline void
__ixp4xx_writesw(volatile void __iomem *bus_addr, const u16 *vaddr, int count)
{
while (count--)
writew(*vaddr++, bus_addr);
}
static inline void
__ixp4xx_writel(u32 value, volatile void __iomem *p)
{
u32 addr = (u32)p;
if (addr >= VMALLOC_START) {
__raw_writel(value, addr);
return;
}
ixp4xx_pci_write(addr, NP_CMD_MEMWRITE, value);
}
static inline void
__ixp4xx_writesl(volatile void __iomem *bus_addr, const u32 *vaddr, int count)
{
while (count--)
writel(*vaddr++, bus_addr);
}
static inline unsigned char
__ixp4xx_readb(const volatile void __iomem *p)
{
u32 addr = (u32)p;
u32 n, byte_enables, data;
if (addr >= VMALLOC_START)
return __raw_readb(addr);
n = addr % 4;
byte_enables = (0xf & ~BIT(n)) << IXP4XX_PCI_NP_CBE_BESL;
if (ixp4xx_pci_read(addr, byte_enables | NP_CMD_MEMREAD, &data))
return 0xff;
return data >> (8*n);
}
static inline void
__ixp4xx_readsb(const volatile void __iomem *bus_addr, u8 *vaddr, u32 count)
{
while (count--)
*vaddr++ = readb(bus_addr);
}
static inline unsigned short
__ixp4xx_readw(const volatile void __iomem *p)
{
u32 addr = (u32)p;
u32 n, byte_enables, data;
if (addr >= VMALLOC_START)
return __raw_readw(addr);
n = addr % 4;
byte_enables = (0xf & ~(BIT(n) | BIT(n+1))) << IXP4XX_PCI_NP_CBE_BESL;
if (ixp4xx_pci_read(addr, byte_enables | NP_CMD_MEMREAD, &data))
return 0xffff;
return data>>(8*n);
}
static inline void
__ixp4xx_readsw(const volatile void __iomem *bus_addr, u16 *vaddr, u32 count)
{
while (count--)
*vaddr++ = readw(bus_addr);
}
static inline unsigned long
__ixp4xx_readl(const volatile void __iomem *p)
{
u32 addr = (u32)p;
u32 data;
if (addr >= VMALLOC_START)
return __raw_readl(addr);
if (ixp4xx_pci_read(addr, NP_CMD_MEMREAD, &data))
return 0xffffffff;
return data;
}
static inline void
__ixp4xx_readsl(const volatile void __iomem *bus_addr, u32 *vaddr, u32 count)
{
while (count--)
*vaddr++ = readl(bus_addr);
}
/*
* We can use the built-in functions b/c they end up calling writeb/readb
*/
#define memset_io(c,v,l) _memset_io((c),(v),(l))
#define memcpy_fromio(a,c,l) _memcpy_fromio((a),(c),(l))
#define memcpy_toio(c,a,l) _memcpy_toio((c),(a),(l))
#define eth_io_copy_and_sum(s,c,l,b) \
eth_copy_and_sum((s),__mem_pci(c),(l),(b))
static inline int
check_signature(const unsigned char __iomem *bus_addr, const unsigned char *signature,
int length)
{
int retval = 0;
do {
if (readb(bus_addr) != *signature)
goto out;
bus_addr++;
signature++;
length--;
} while (length);
retval = 1;
out:
return retval;
}
#endif
/*
* IXP4xx does not have a transparent cpu -> PCI I/O translation
* window. Instead, it has a set of registers that must be tweaked
* with the proper byte lanes, command types, and address for the
* transaction. This means that we need to override the default
* I/O functions.
*/
#define outb(p, v) __ixp4xx_outb(p, v)
#define outw(p, v) __ixp4xx_outw(p, v)
#define outl(p, v) __ixp4xx_outl(p, v)
#define outsb(p, v, l) __ixp4xx_outsb(p, v, l)
#define outsw(p, v, l) __ixp4xx_outsw(p, v, l)
#define outsl(p, v, l) __ixp4xx_outsl(p, v, l)
#define inb(p) __ixp4xx_inb(p)
#define inw(p) __ixp4xx_inw(p)
#define inl(p) __ixp4xx_inl(p)
#define insb(p, v, l) __ixp4xx_insb(p, v, l)
#define insw(p, v, l) __ixp4xx_insw(p, v, l)
#define insl(p, v, l) __ixp4xx_insl(p, v, l)
static inline void
__ixp4xx_outb(u8 value, u32 addr)
{
u32 n, byte_enables, data;
n = addr % 4;
byte_enables = (0xf & ~BIT(n)) << IXP4XX_PCI_NP_CBE_BESL;
data = value << (8*n);
ixp4xx_pci_write(addr, byte_enables | NP_CMD_IOWRITE, data);
}
static inline void
__ixp4xx_outsb(u32 io_addr, const u8 *vaddr, u32 count)
{
while (count--)
outb(*vaddr++, io_addr);
}
static inline void
__ixp4xx_outw(u16 value, u32 addr)
{
u32 n, byte_enables, data;
n = addr % 4;
byte_enables = (0xf & ~(BIT(n) | BIT(n+1))) << IXP4XX_PCI_NP_CBE_BESL;
data = value << (8*n);
ixp4xx_pci_write(addr, byte_enables | NP_CMD_IOWRITE, data);
}
static inline void
__ixp4xx_outsw(u32 io_addr, const u16 *vaddr, u32 count)
{
while (count--)
outw(cpu_to_le16(*vaddr++), io_addr);
}
static inline void
__ixp4xx_outl(u32 value, u32 addr)
{
ixp4xx_pci_write(addr, NP_CMD_IOWRITE, value);
}
static inline void
__ixp4xx_outsl(u32 io_addr, const u32 *vaddr, u32 count)
{
while (count--)
outl(*vaddr++, io_addr);
}
static inline u8
__ixp4xx_inb(u32 addr)
{
u32 n, byte_enables, data;
n = addr % 4;
byte_enables = (0xf & ~BIT(n)) << IXP4XX_PCI_NP_CBE_BESL;
if (ixp4xx_pci_read(addr, byte_enables | NP_CMD_IOREAD, &data))
return 0xff;
return data >> (8*n);
}
static inline void
__ixp4xx_insb(u32 io_addr, u8 *vaddr, u32 count)
{
while (count--)
*vaddr++ = inb(io_addr);
}
static inline u16
__ixp4xx_inw(u32 addr)
{
u32 n, byte_enables, data;
n = addr % 4;
byte_enables = (0xf & ~(BIT(n) | BIT(n+1))) << IXP4XX_PCI_NP_CBE_BESL;
if (ixp4xx_pci_read(addr, byte_enables | NP_CMD_IOREAD, &data))
return 0xffff;
return data>>(8*n);
}
static inline void
__ixp4xx_insw(u32 io_addr, u16 *vaddr, u32 count)
{
while (count--)
*vaddr++ = le16_to_cpu(inw(io_addr));
}
static inline u32
__ixp4xx_inl(u32 addr)
{
u32 data;
if (ixp4xx_pci_read(addr, NP_CMD_IOREAD, &data))
return 0xffffffff;
return data;
}
static inline void
__ixp4xx_insl(u32 io_addr, u32 *vaddr, u32 count)
{
while (count--)
*vaddr++ = inl(io_addr);
}
#define PIO_OFFSET 0x10000UL
#define PIO_MASK 0x0ffffUL
#define __is_io_address(p) (((unsigned long)p >= PIO_OFFSET) && \
((unsigned long)p <= (PIO_MASK + PIO_OFFSET)))
static inline unsigned int
__ixp4xx_ioread8(const void __iomem *addr)
{
unsigned long port = (unsigned long __force)addr;
if (__is_io_address(port))
return (unsigned int)__ixp4xx_inb(port & PIO_MASK);
else
#ifndef CONFIG_IXP4XX_INDIRECT_PCI
return (unsigned int)__raw_readb(port);
#else
return (unsigned int)__ixp4xx_readb(addr);
#endif
}
static inline void
__ixp4xx_ioread8_rep(const void __iomem *addr, void *vaddr, u32 count)
{
unsigned long port = (unsigned long __force)addr;
if (__is_io_address(port))
__ixp4xx_insb(port & PIO_MASK, vaddr, count);
else
#ifndef CONFIG_IXP4XX_INDIRECT_PCI
__raw_readsb(addr, vaddr, count);
#else
__ixp4xx_readsb(addr, vaddr, count);
#endif
}
static inline unsigned int
__ixp4xx_ioread16(const void __iomem *addr)
{
unsigned long port = (unsigned long __force)addr;
if (__is_io_address(port))
return (unsigned int)__ixp4xx_inw(port & PIO_MASK);
else
#ifndef CONFIG_IXP4XX_INDIRECT_PCI
return le16_to_cpu(__raw_readw((u32)port));
#else
return (unsigned int)__ixp4xx_readw(addr);
#endif
}
static inline void
__ixp4xx_ioread16_rep(const void __iomem *addr, void *vaddr, u32 count)
{
unsigned long port = (unsigned long __force)addr;
if (__is_io_address(port))
__ixp4xx_insw(port & PIO_MASK, vaddr, count);
else
#ifndef CONFIG_IXP4XX_INDIRECT_PCI
__raw_readsw(addr, vaddr, count);
#else
__ixp4xx_readsw(addr, vaddr, count);
#endif
}
static inline unsigned int
__ixp4xx_ioread32(const void __iomem *addr)
{
unsigned long port = (unsigned long __force)addr;
if (__is_io_address(port))
return (unsigned int)__ixp4xx_inl(port & PIO_MASK);
else {
#ifndef CONFIG_IXP4XX_INDIRECT_PCI
return le32_to_cpu(__raw_readl((u32)port));
#else
return (unsigned int)__ixp4xx_readl(addr);
#endif
}
}
static inline void
__ixp4xx_ioread32_rep(const void __iomem *addr, void *vaddr, u32 count)
{
unsigned long port = (unsigned long __force)addr;
if (__is_io_address(port))
__ixp4xx_insl(port & PIO_MASK, vaddr, count);
else
#ifndef CONFIG_IXP4XX_INDIRECT_PCI
__raw_readsl(addr, vaddr, count);
#else
__ixp4xx_readsl(addr, vaddr, count);
#endif
}
static inline void
__ixp4xx_iowrite8(u8 value, void __iomem *addr)
{
unsigned long port = (unsigned long __force)addr;
if (__is_io_address(port))
__ixp4xx_outb(value, port & PIO_MASK);
else
#ifndef CONFIG_IXP4XX_INDIRECT_PCI
__raw_writeb(value, port);
#else
__ixp4xx_writeb(value, addr);
#endif
}
static inline void
__ixp4xx_iowrite8_rep(void __iomem *addr, const void *vaddr, u32 count)
{
unsigned long port = (unsigned long __force)addr;
if (__is_io_address(port))
__ixp4xx_outsb(port & PIO_MASK, vaddr, count);
else
#ifndef CONFIG_IXP4XX_INDIRECT_PCI
__raw_writesb(addr, vaddr, count);
#else
__ixp4xx_writesb(addr, vaddr, count);
#endif
}
static inline void
__ixp4xx_iowrite16(u16 value, void __iomem *addr)
{
unsigned long port = (unsigned long __force)addr;
if (__is_io_address(port))
__ixp4xx_outw(value, port & PIO_MASK);
else
#ifndef CONFIG_IXP4XX_INDIRECT_PCI
__raw_writew(cpu_to_le16(value), addr);
#else
__ixp4xx_writew(value, addr);
#endif
}
static inline void
__ixp4xx_iowrite16_rep(void __iomem *addr, const void *vaddr, u32 count)
{
unsigned long port = (unsigned long __force)addr;
if (__is_io_address(port))
__ixp4xx_outsw(port & PIO_MASK, vaddr, count);
else
#ifndef CONFIG_IXP4XX_INDIRECT_PCI
__raw_writesw(addr, vaddr, count);
#else
__ixp4xx_writesw(addr, vaddr, count);
#endif
}
static inline void
__ixp4xx_iowrite32(u32 value, void __iomem *addr)
{
unsigned long port = (unsigned long __force)addr;
if (__is_io_address(port))
__ixp4xx_outl(value, port & PIO_MASK);
else
#ifndef CONFIG_IXP4XX_INDIRECT_PCI
__raw_writel(cpu_to_le32(value), port);
#else
__ixp4xx_writel(value, addr);
#endif
}
static inline void
__ixp4xx_iowrite32_rep(void __iomem *addr, const void *vaddr, u32 count)
{
unsigned long port = (unsigned long __force)addr;
if (__is_io_address(port))
__ixp4xx_outsl(port & PIO_MASK, vaddr, count);
else
#ifndef CONFIG_IXP4XX_INDIRECT_PCI
__raw_writesl(addr, vaddr, count);
#else
__ixp4xx_writesl(addr, vaddr, count);
#endif
}
#define ioread8(p) __ixp4xx_ioread8(p)
#define ioread16(p) __ixp4xx_ioread16(p)
#define ioread32(p) __ixp4xx_ioread32(p)
#define ioread8_rep(p, v, c) __ixp4xx_ioread8_rep(p, v, c)
#define ioread16_rep(p, v, c) __ixp4xx_ioread16_rep(p, v, c)
#define ioread32_rep(p, v, c) __ixp4xx_ioread32_rep(p, v, c)
#define iowrite8(v,p) __ixp4xx_iowrite8(v,p)
#define iowrite16(v,p) __ixp4xx_iowrite16(v,p)
#define iowrite32(v,p) __ixp4xx_iowrite32(v,p)
#define iowrite8_rep(p, v, c) __ixp4xx_iowrite8_rep(p, v, c)
#define iowrite16_rep(p, v, c) __ixp4xx_iowrite16_rep(p, v, c)
#define iowrite32_rep(p, v, c) __ixp4xx_iowrite32_rep(p, v, c)
#define ioport_map(port, nr) ((void __iomem*)(port + PIO_OFFSET))
#define ioport_unmap(addr)
#endif // __ASM_ARM_ARCH_IO_H