diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-arm/arch-omap/io.h |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-arm/arch-omap/io.h')
-rw-r--r-- | include/asm-arm/arch-omap/io.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/include/asm-arm/arch-omap/io.h b/include/asm-arm/arch-omap/io.h new file mode 100644 index 00000000000..1c8c9fcc766 --- /dev/null +++ b/include/asm-arm/arch-omap/io.h @@ -0,0 +1,107 @@ +/* + * linux/include/asm-arm/arch-omap/io.h + * + * IO definitions for TI OMAP processors and boards + * + * Copied from linux/include/asm-arm/arch-sa1100/io.h + * Copyright (C) 1997-1999 Russell King + * + * 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. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Modifications: + * 06-12-1997 RMK Created. + * 07-04-1999 RMK Major cleanup + */ + +#ifndef __ASM_ARM_ARCH_IO_H +#define __ASM_ARM_ARCH_IO_H + +#define IO_SPACE_LIMIT 0xffffffff + +/* + * We don't actually have real ISA nor PCI buses, but there is so many + * drivers out there that might just work if we fake them... + */ +#define __io(a) ((void __iomem *)(PCIO_BASE + (a))) +#define __mem_pci(a) (a) +#define __mem_isa(a) (a) + +/* + * ---------------------------------------------------------------------------- + * I/O mapping + * ---------------------------------------------------------------------------- + */ +#define IO_PHYS 0xFFFB0000 +#define IO_OFFSET 0x01000000 /* Virtual IO = 0xfefb0000 */ +#define IO_VIRT (IO_PHYS - IO_OFFSET) +#define IO_SIZE 0x40000 +#define IO_ADDRESS(x) ((x) - IO_OFFSET) + +#define PCIO_BASE 0 + +#define io_p2v(x) ((x) - IO_OFFSET) +#define io_v2p(x) ((x) + IO_OFFSET) + +#ifndef __ASSEMBLER__ + +/* + * Functions to access the OMAP IO region + * + * NOTE: - Use omap_read/write[bwl] for physical register addresses + * - Use __raw_read/write[bwl]() for virtual register addresses + * - Use IO_ADDRESS(phys_addr) to convert registers to virtual addresses + * - DO NOT use hardcoded virtual addresses to allow changing the + * IO address space again if needed + */ +#define omap_readb(a) (*(volatile unsigned char *)IO_ADDRESS(a)) +#define omap_readw(a) (*(volatile unsigned short *)IO_ADDRESS(a)) +#define omap_readl(a) (*(volatile unsigned int *)IO_ADDRESS(a)) + +#define omap_writeb(v,a) (*(volatile unsigned char *)IO_ADDRESS(a) = (v)) +#define omap_writew(v,a) (*(volatile unsigned short *)IO_ADDRESS(a) = (v)) +#define omap_writel(v,a) (*(volatile unsigned int *)IO_ADDRESS(a) = (v)) + +/* 16 bit uses LDRH/STRH, base +/- offset_8 */ +typedef struct { volatile u16 offset[256]; } __regbase16; +#define __REGV16(vaddr) ((__regbase16 *)((vaddr)&~0xff)) \ + ->offset[((vaddr)&0xff)>>1] +#define __REG16(paddr) __REGV16(io_p2v(paddr)) + +/* 8/32 bit uses LDR/STR, base +/- offset_12 */ +typedef struct { volatile u8 offset[4096]; } __regbase8; +#define __REGV8(vaddr) ((__regbase8 *)((vaddr)&~4095)) \ + ->offset[((vaddr)&4095)>>0] +#define __REG8(paddr) __REGV8(io_p2v(paddr)) + +typedef struct { volatile u32 offset[4096]; } __regbase32; +#define __REGV32(vaddr) ((__regbase32 *)((vaddr)&~4095)) \ + ->offset[((vaddr)&4095)>>2] +#define __REG32(paddr) __REGV32(io_p2v(paddr)) + +#else + +#define __REG8(paddr) io_p2v(paddr) +#define __REG16(paddr) io_p2v(paddr) +#define __REG32(paddr) io_p2v(paddr) + +#endif + +#endif |