summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--arch/xtensa/Kconfig2
-rw-r--r--arch/xtensa/include/asm/io.h156
-rw-r--r--arch/xtensa/kernel/Makefile2
-rw-r--r--arch/xtensa/kernel/io.c75
-rw-r--r--drivers/usb/musb/musb_io.h3
5 files changed, 14 insertions, 224 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 8ed64cfae4ff..2debe94443b2 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -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
diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h
index 4f66dfc103a5..e6be5b9091c2 100644
--- a/arch/xtensa/include/asm/io.h
+++ b/arch/xtensa/include/asm/io.h
@@ -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 */
diff --git a/arch/xtensa/kernel/Makefile b/arch/xtensa/kernel/Makefile
index 0f9f35fc191a..f36cef5a62ff 100644
--- a/arch/xtensa/kernel/Makefile
+++ b/arch/xtensa/kernel/Makefile
@@ -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
diff --git a/arch/xtensa/kernel/io.c b/arch/xtensa/kernel/io.c
deleted file mode 100644
index 5b65269b1d2f..000000000000
--- a/arch/xtensa/kernel/io.c
+++ /dev/null
@@ -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;
- }
-}
diff --git a/drivers/usb/musb/musb_io.h b/drivers/usb/musb/musb_io.h
index f7c1c8e2dc3f..565ad1617832 100644
--- a/drivers/usb/musb/musb_io.h
+++ b/drivers/usb/musb/musb_io.h
@@ -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)
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-25 10:21:03 +0300