mirror of https://gitee.com/openkylin/linux.git
xtensa: adopt generic io routines
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
This commit is contained in:
Max Filippov
Chris Zankel
parent
02f3774877
commit
d38efc1f15
|
|
@ -11,6 +11,8 @@ config XTENSA
|
|||
select HAVE_GENERIC_HARDIRQS
|
||||
select GENERIC_IRQ_SHOW
|
||||
select GENERIC_CPU_DEVICES
|
||||
select MODULES_USE_ELF_RELA
|
||||
select GENERIC_PCI_IOMAP
|
||||
help
|
||||
Xtensa processors are 32-bit RISC machines designed by Tensilica
|
||||
primarily for embedded systems. These processors are both
|
||||
|
|
|
|||
|
|
@ -25,74 +25,31 @@
|
|||
#define XCHAL_KIO_SIZE 0x10000000
|
||||
|
||||
#define IOADDR(x) (XCHAL_KIO_BYPASS_VADDR + (x))
|
||||
#define IO_SPACE_LIMIT ~0
|
||||
|
||||
#ifdef CONFIG_MMU
|
||||
/*
|
||||
* swap functions to change byte order from little-endian to big-endian and
|
||||
* vice versa.
|
||||
*/
|
||||
|
||||
static inline unsigned short _swapw (unsigned short v)
|
||||
{
|
||||
return (v << 8) | (v >> 8);
|
||||
}
|
||||
|
||||
static inline unsigned int _swapl (unsigned int v)
|
||||
{
|
||||
return (v << 24) | ((v & 0xff00) << 8) | ((v >> 8) & 0xff00) | (v >> 24);
|
||||
}
|
||||
|
||||
/*
|
||||
* Change virtual addresses to physical addresses and vv.
|
||||
* These are trivial on the 1:1 Linux/Xtensa mapping
|
||||
*/
|
||||
|
||||
static inline unsigned long virt_to_phys(volatile void * address)
|
||||
{
|
||||
return __pa(address);
|
||||
}
|
||||
|
||||
static inline void * phys_to_virt(unsigned long address)
|
||||
{
|
||||
return __va(address);
|
||||
}
|
||||
|
||||
/*
|
||||
* virt_to_bus and bus_to_virt are deprecated.
|
||||
*/
|
||||
|
||||
#define virt_to_bus(x) virt_to_phys(x)
|
||||
#define bus_to_virt(x) phys_to_virt(x)
|
||||
|
||||
/*
|
||||
* Return the virtual (cached) address for the specified bus memory.
|
||||
* Return the virtual address for the specified bus memory.
|
||||
* Note that we currently don't support any address outside the KIO segment.
|
||||
*/
|
||||
static inline void __iomem *ioremap_nocache(unsigned long offset,
|
||||
unsigned long size)
|
||||
{
|
||||
#ifdef CONFIG_MMU
|
||||
if (offset >= XCHAL_KIO_PADDR
|
||||
&& offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
|
||||
return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR);
|
||||
else
|
||||
BUG();
|
||||
#else
|
||||
return (void *)offset;
|
||||
#endif
|
||||
}
|
||||
|
||||
static inline void __iomem *ioremap_cache(unsigned long offset,
|
||||
unsigned long size)
|
||||
{
|
||||
#ifdef CONFIG_MMU
|
||||
if (offset >= XCHAL_KIO_PADDR
|
||||
&& offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
|
||||
return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR);
|
||||
else
|
||||
BUG();
|
||||
#else
|
||||
return (void *)offset;
|
||||
#endif
|
||||
}
|
||||
|
||||
#define ioremap_wc ioremap_nocache
|
||||
|
|
@ -105,112 +62,17 @@ static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
|
|||
static inline void iounmap(volatile void __iomem *addr)
|
||||
{
|
||||
}
|
||||
#endif /* CONFIG_MMU */
|
||||
|
||||
/*
|
||||
* Generic I/O
|
||||
*/
|
||||
|
||||
#define readb(addr) \
|
||||
({ unsigned char __v = (*(volatile unsigned char *)(addr)); __v; })
|
||||
#define readw(addr) \
|
||||
({ unsigned short __v = (*(volatile unsigned short *)(addr)); __v; })
|
||||
#define readl(addr) \
|
||||
({ unsigned int __v = (*(volatile unsigned int *)(addr)); __v; })
|
||||
#define writeb(b, addr) (void)((*(volatile unsigned char *)(addr)) = (b))
|
||||
#define writew(b, addr) (void)((*(volatile unsigned short *)(addr)) = (b))
|
||||
#define writel(b, addr) (void)((*(volatile unsigned int *)(addr)) = (b))
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
/* These are the definitions for the x86 IO instructions
|
||||
* inb/inw/inl/outb/outw/outl, the "string" versions
|
||||
* insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
|
||||
* inb_p/inw_p/...
|
||||
* The macros don't do byte-swapping.
|
||||
*/
|
||||
|
||||
#define inb(port) readb((u8 *)((port)))
|
||||
#define outb(val, port) writeb((val),(u8 *)((unsigned long)(port)))
|
||||
#define inw(port) readw((u16 *)((port)))
|
||||
#define outw(val, port) writew((val),(u16 *)((unsigned long)(port)))
|
||||
#define inl(port) readl((u32 *)((port)))
|
||||
#define outl(val, port) writel((val),(u32 *)((unsigned long)(port)))
|
||||
|
||||
#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 (unsigned long port, void *dst, unsigned long count);
|
||||
extern void insw (unsigned long port, void *dst, unsigned long count);
|
||||
extern void insl (unsigned long port, void *dst, unsigned long count);
|
||||
extern void outsb (unsigned long port, const void *src, unsigned long count);
|
||||
extern void outsw (unsigned long port, const void *src, unsigned long count);
|
||||
extern void outsl (unsigned long port, const void *src, unsigned long count);
|
||||
|
||||
#define IO_SPACE_LIMIT ~0
|
||||
|
||||
#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))
|
||||
|
||||
/* At this point the Xtensa doesn't provide byte swap instructions */
|
||||
|
||||
#ifdef __XTENSA_EB__
|
||||
# define in_8(addr) (*(u8*)(addr))
|
||||
# define in_le16(addr) _swapw(*(u16*)(addr))
|
||||
# define in_le32(addr) _swapl(*(u32*)(addr))
|
||||
# define out_8(b, addr) *(u8*)(addr) = (b)
|
||||
# define out_le16(b, addr) *(u16*)(addr) = _swapw(b)
|
||||
# define out_le32(b, addr) *(u32*)(addr) = _swapl(b)
|
||||
#elif defined(__XTENSA_EL__)
|
||||
# define in_8(addr) (*(u8*)(addr))
|
||||
# define in_le16(addr) (*(u16*)(addr))
|
||||
# define in_le32(addr) (*(u32*)(addr))
|
||||
# define out_8(b, addr) *(u8*)(addr) = (b)
|
||||
# define out_le16(b, addr) *(u16*)(addr) = (b)
|
||||
# define out_le32(b, addr) *(u32*)(addr) = (b)
|
||||
#else
|
||||
# error processor byte order undefined!
|
||||
#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
|
||||
|
||||
#define readb_relaxed readb
|
||||
#define readw_relaxed readw
|
||||
#define readl_relaxed readl
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#include <asm-generic/io.h>
|
||||
|
||||
#endif /* _XTENSA_IO_H */
|
||||
|
|
|
|||
|
|
@ -6,7 +6,7 @@ extra-y := head.o vmlinux.lds
|
|||
|
||||
obj-y := align.o entry.o irq.o coprocessor.o process.o ptrace.o \
|
||||
setup.o signal.o syscall.o time.o traps.o vectors.o platform.o \
|
||||
pci-dma.o io.o
|
||||
pci-dma.o
|
||||
|
||||
obj-$(CONFIG_KGDB) += xtensa-stub.o
|
||||
obj-$(CONFIG_PCI) += pci.o
|
||||
|
|
|
|||
|
|
@ -1,75 +0,0 @@
|
|||
/*
|
||||
* arch/xtensa/io.c
|
||||
*
|
||||
* IO primitives
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version.
|
||||
*
|
||||
* Copied from sparc.
|
||||
*
|
||||
* Chris Zankel <chris@zankel.net>
|
||||
*
|
||||
*/
|
||||
|
||||
#include <asm/io.h>
|
||||
#include <asm/byteorder.h>
|
||||
|
||||
void outsb(unsigned long addr, const void *src, unsigned long count) {
|
||||
while (count) {
|
||||
count -= 1;
|
||||
writeb(*(const char *)src, addr);
|
||||
src += 1;
|
||||
addr += 1;
|
||||
}
|
||||
}
|
||||
|
||||
void outsw(unsigned long addr, const void *src, unsigned long count) {
|
||||
while (count) {
|
||||
count -= 2;
|
||||
writew(*(const short *)src, addr);
|
||||
src += 2;
|
||||
addr += 2;
|
||||
}
|
||||
}
|
||||
|
||||
void outsl(unsigned long addr, const void *src, unsigned long count) {
|
||||
while (count) {
|
||||
count -= 4;
|
||||
writel(*(const long *)src, addr);
|
||||
src += 4;
|
||||
addr += 4;
|
||||
}
|
||||
}
|
||||
|
||||
void insb(unsigned long addr, void *dst, unsigned long count) {
|
||||
while (count) {
|
||||
count -= 1;
|
||||
*(unsigned char *)dst = readb(addr);
|
||||
dst += 1;
|
||||
addr += 1;
|
||||
}
|
||||
}
|
||||
|
||||
void insw(unsigned long addr, void *dst, unsigned long count) {
|
||||
while (count) {
|
||||
count -= 2;
|
||||
*(unsigned short *)dst = readw(addr);
|
||||
dst += 2;
|
||||
addr += 2;
|
||||
}
|
||||
}
|
||||
|
||||
void insl(unsigned long addr, void *dst, unsigned long count) {
|
||||
while (count) {
|
||||
count -= 4;
|
||||
/*
|
||||
* XXX I am sure we are in for an unaligned trap here.
|
||||
*/
|
||||
*(unsigned long *)dst = readl(addr);
|
||||
dst += 4;
|
||||
addr += 4;
|
||||
}
|
||||
}
|
||||
|
|
@ -40,7 +40,8 @@
|
|||
#if !defined(CONFIG_ARM) && !defined(CONFIG_SUPERH) \
|
||||
&& !defined(CONFIG_AVR32) && !defined(CONFIG_PPC32) \
|
||||
&& !defined(CONFIG_PPC64) && !defined(CONFIG_BLACKFIN) \
|
||||
&& !defined(CONFIG_MIPS) && !defined(CONFIG_M68K)
|
||||
&& !defined(CONFIG_MIPS) && !defined(CONFIG_M68K) \
|
||||
&& !defined(CONFIG_XTENSA)
|
||||
static inline void readsl(const void __iomem *addr, void *buf, int len)
|
||||
{ insl((unsigned long)addr, buf, len); }
|
||||
static inline void readsw(const void __iomem *addr, void *buf, int len)
|
||||
|
|
|
|||
Loading…
Reference in New Issue