mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 01:31:44 +00:00
5f97f7f940
This adds support for the Atmel AVR32 architecture as well as the AT32AP7000 CPU and the AT32STK1000 development board. AVR32 is a new high-performance 32-bit RISC microprocessor core, designed for cost-sensitive embedded applications, with particular emphasis on low power consumption and high code density. The AVR32 architecture is not binary compatible with earlier 8-bit AVR architectures. The AVR32 architecture, including the instruction set, is described by the AVR32 Architecture Manual, available from http://www.atmel.com/dyn/resources/prod_documents/doc32000.pdf The Atmel AT32AP7000 is the first CPU implementing the AVR32 architecture. It features a 7-stage pipeline, 16KB instruction and data caches and a full Memory Management Unit. It also comes with a large set of integrated peripherals, many of which are shared with the AT91 ARM-based controllers from Atmel. Full data sheet is available from http://www.atmel.com/dyn/resources/prod_documents/doc32003.pdf while the CPU core implementation including caches and MMU is documented by the AVR32 AP Technical Reference, available from http://www.atmel.com/dyn/resources/prod_documents/doc32001.pdf Information about the AT32STK1000 development board can be found at http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3918 including a BSP CD image with an earlier version of this patch, development tools (binaries and source/patches) and a root filesystem image suitable for booting from SD card. Alternatively, there's a preliminary "getting started" guide available at http://avr32linux.org/twiki/bin/view/Main/GettingStarted which provides links to the sources and patches you will need in order to set up a cross-compiling environment for avr32-linux. This patch, as well as the other patches included with the BSP and the toolchain patches, is actively supported by Atmel Corporation. [dmccr@us.ibm.com: Fix more pxx_page macro locations] [bunk@stusta.de: fix `make defconfig'] Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Dave McCracken <dmccr@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
113 lines
3.2 KiB
C
113 lines
3.2 KiB
C
/*
|
|
* Copyright (C) 2004-2006 Atmel Corporation
|
|
*
|
|
* 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_AVR32_PAGE_H
|
|
#define __ASM_AVR32_PAGE_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/* PAGE_SHIFT determines the page size */
|
|
#define PAGE_SHIFT 12
|
|
#ifdef __ASSEMBLY__
|
|
#define PAGE_SIZE (1 << PAGE_SHIFT)
|
|
#else
|
|
#define PAGE_SIZE (1UL << PAGE_SHIFT)
|
|
#endif
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
#define PTE_MASK PAGE_MASK
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm/addrspace.h>
|
|
|
|
extern void clear_page(void *to);
|
|
extern void copy_page(void *to, void *from);
|
|
|
|
#define clear_user_page(page, vaddr, pg) clear_page(page)
|
|
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
|
|
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
typedef struct { unsigned long pte; } pte_t;
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
|
|
#define pte_val(x) ((x).pte)
|
|
#define pgd_val(x) ((x).pgd)
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
|
|
#define __pte(x) ((pte_t) { (x) })
|
|
#define __pgd(x) ((pgd_t) { (x) })
|
|
#define __pgprot(x) ((pgprot_t) { (x) })
|
|
|
|
/* FIXME: These should be removed soon */
|
|
extern unsigned long memory_start, memory_end;
|
|
|
|
/* Pure 2^n version of get_order */
|
|
static inline int get_order(unsigned long size)
|
|
{
|
|
unsigned lz;
|
|
|
|
size = (size - 1) >> PAGE_SHIFT;
|
|
asm("clz %0, %1" : "=r"(lz) : "r"(size));
|
|
return 32 - lz;
|
|
}
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
/* Align the pointer to the (next) page boundary */
|
|
#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
|
|
|
|
/*
|
|
* The hardware maps the virtual addresses 0x80000000 -> 0x9fffffff
|
|
* permanently to the physical addresses 0x00000000 -> 0x1fffffff when
|
|
* segmentation is enabled. We want to make use of this in order to
|
|
* minimize TLB pressure.
|
|
*/
|
|
#define PAGE_OFFSET (0x80000000UL)
|
|
|
|
/*
|
|
* ALSA uses virt_to_page() on DMA pages, which I'm not entirely sure
|
|
* is a good idea. Anyway, we can't simply subtract PAGE_OFFSET here
|
|
* in that case, so we'll have to mask out the three most significant
|
|
* bits of the address instead...
|
|
*
|
|
* What's the difference between __pa() and virt_to_phys() anyway?
|
|
*/
|
|
#define __pa(x) PHYSADDR(x)
|
|
#define __va(x) ((void *)(P1SEGADDR(x)))
|
|
|
|
#define MAP_NR(addr) (((unsigned long)(addr) - PAGE_OFFSET) >> PAGE_SHIFT)
|
|
|
|
#define phys_to_page(phys) (pfn_to_page(phys >> PAGE_SHIFT))
|
|
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
|
|
|
|
#ifndef CONFIG_NEED_MULTIPLE_NODES
|
|
|
|
#define PHYS_PFN_OFFSET (CONFIG_PHYS_OFFSET >> PAGE_SHIFT)
|
|
|
|
#define pfn_to_page(pfn) (mem_map + ((pfn) - PHYS_PFN_OFFSET))
|
|
#define page_to_pfn(page) ((unsigned long)((page) - mem_map) + PHYS_PFN_OFFSET)
|
|
#define pfn_valid(pfn) ((pfn) >= PHYS_PFN_OFFSET && (pfn) < (PHYS_PFN_OFFSET + max_mapnr))
|
|
#endif /* CONFIG_NEED_MULTIPLE_NODES */
|
|
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
/*
|
|
* Memory above this physical address will be considered highmem.
|
|
*/
|
|
#define HIGHMEM_START 0x20000000UL
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* __ASM_AVR32_PAGE_H */
|