2012-03-05 04:49:27 -07:00
|
|
|
/*
|
|
|
|
* Based on arch/arm/include/asm/memory.h
|
|
|
|
*
|
|
|
|
* Copyright (C) 2000-2002 Russell King
|
|
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
*
|
|
|
|
* Note: this file should not be included by non-asm/.h files
|
|
|
|
*/
|
|
|
|
#ifndef __ASM_MEMORY_H
|
|
|
|
#define __ASM_MEMORY_H
|
|
|
|
|
|
|
|
#include <linux/compiler.h>
|
|
|
|
#include <linux/const.h>
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <asm/sizes.h>
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Allow for constants defined here to be used from assembly code
|
|
|
|
* by prepending the UL suffix only with actual C code compilation.
|
|
|
|
*/
|
|
|
|
#define UL(x) _AC(x, UL)
|
|
|
|
|
|
|
|
/*
|
2013-10-23 09:50:07 -06:00
|
|
|
* PAGE_OFFSET - the virtual address of the start of the kernel image (top
|
|
|
|
* (VA_BITS - 1))
|
2012-03-05 04:49:27 -07:00
|
|
|
* VA_BITS - the maximum number of bits for virtual addresses.
|
|
|
|
* TASK_SIZE - the maximum size of a user space task.
|
|
|
|
* TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area.
|
|
|
|
* The module space lives between the addresses given by TASK_SIZE
|
|
|
|
* and PAGE_OFFSET - it must be within 128MB of the kernel text.
|
|
|
|
*/
|
2013-10-23 09:50:07 -06:00
|
|
|
#ifdef CONFIG_ARM64_64K_PAGES
|
|
|
|
#define VA_BITS (42)
|
|
|
|
#else
|
|
|
|
#define VA_BITS (39)
|
|
|
|
#endif
|
|
|
|
#define PAGE_OFFSET (UL(0xffffffffffffffff) << (VA_BITS - 1))
|
2012-03-05 04:49:27 -07:00
|
|
|
#define MODULES_END (PAGE_OFFSET)
|
|
|
|
#define MODULES_VADDR (MODULES_END - SZ_64M)
|
2012-10-23 07:55:08 -06:00
|
|
|
#define EARLYCON_IOBASE (MODULES_VADDR - SZ_4M)
|
2012-03-05 04:49:27 -07:00
|
|
|
#define TASK_SIZE_64 (UL(1) << VA_BITS)
|
|
|
|
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
#define TASK_SIZE_32 UL(0x100000000)
|
|
|
|
#define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \
|
|
|
|
TASK_SIZE_32 : TASK_SIZE_64)
|
|
|
|
#else
|
|
|
|
#define TASK_SIZE TASK_SIZE_64
|
|
|
|
#endif /* CONFIG_COMPAT */
|
|
|
|
|
|
|
|
#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 4))
|
|
|
|
|
|
|
|
#if TASK_SIZE_64 > MODULES_VADDR
|
|
|
|
#error Top of 64-bit user space clashes with start of module space
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Physical vs virtual RAM address space conversion. These are
|
|
|
|
* private definitions which should NOT be used outside memory.h
|
|
|
|
* files. Use virt_to_phys/phys_to_virt/__pa/__va instead.
|
|
|
|
*/
|
|
|
|
#define __virt_to_phys(x) (((phys_addr_t)(x) - PAGE_OFFSET + PHYS_OFFSET))
|
|
|
|
#define __phys_to_virt(x) ((unsigned long)((x) - PHYS_OFFSET + PAGE_OFFSET))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Convert a physical address to a Page Frame Number and back
|
|
|
|
*/
|
|
|
|
#define __phys_to_pfn(paddr) ((unsigned long)((paddr) >> PAGE_SHIFT))
|
|
|
|
#define __pfn_to_phys(pfn) ((phys_addr_t)(pfn) << PAGE_SHIFT)
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Convert a page to/from a physical address
|
|
|
|
*/
|
|
|
|
#define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page)))
|
|
|
|
#define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys)))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Memory types available.
|
|
|
|
*/
|
|
|
|
#define MT_DEVICE_nGnRnE 0
|
|
|
|
#define MT_DEVICE_nGnRE 1
|
|
|
|
#define MT_DEVICE_GRE 2
|
|
|
|
#define MT_NORMAL_NC 3
|
|
|
|
#define MT_NORMAL 4
|
|
|
|
|
2012-12-07 11:35:41 -07:00
|
|
|
/*
|
|
|
|
* Memory types for Stage-2 translation
|
|
|
|
*/
|
|
|
|
#define MT_S2_NORMAL 0xf
|
|
|
|
#define MT_S2_DEVICE_nGnRE 0x1
|
|
|
|
|
2012-03-05 04:49:27 -07:00
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
|
|
|
|
extern phys_addr_t memstart_addr;
|
|
|
|
/* PHYS_OFFSET - the physical address of the start of memory. */
|
|
|
|
#define PHYS_OFFSET ({ memstart_addr; })
|
|
|
|
|
|
|
|
/*
|
|
|
|
* PFNs are used to describe any physical page; this means
|
|
|
|
* PFN 0 == physical address 0.
|
|
|
|
*
|
|
|
|
* This is the PFN of the first RAM page in the kernel
|
|
|
|
* direct-mapped view. We assume this is the first page
|
|
|
|
* of RAM in the mem_map as well.
|
|
|
|
*/
|
|
|
|
#define PHYS_PFN_OFFSET (PHYS_OFFSET >> PAGE_SHIFT)
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Note: Drivers should NOT use these. They are the wrong
|
|
|
|
* translation for translating DMA addresses. Use the driver
|
|
|
|
* DMA support - see dma-mapping.h.
|
|
|
|
*/
|
|
|
|
static inline phys_addr_t virt_to_phys(const volatile void *x)
|
|
|
|
{
|
|
|
|
return __virt_to_phys((unsigned long)(x));
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void *phys_to_virt(phys_addr_t x)
|
|
|
|
{
|
|
|
|
return (void *)(__phys_to_virt(x));
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Drivers should NOT use these either.
|
|
|
|
*/
|
|
|
|
#define __pa(x) __virt_to_phys((unsigned long)(x))
|
|
|
|
#define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x)))
|
|
|
|
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
|
|
|
|
|
|
|
|
/*
|
|
|
|
* virt_to_page(k) convert a _valid_ virtual address to struct page *
|
|
|
|
* virt_addr_valid(k) indicates whether a virtual address is valid
|
|
|
|
*/
|
|
|
|
#define ARCH_PFN_OFFSET PHYS_PFN_OFFSET
|
|
|
|
|
|
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
2013-12-10 18:23:02 -07:00
|
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
2012-03-05 04:49:27 -07:00
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
|
|
|
|
|
|
#endif
|