arch/arm/mach-msm/include/mach/memory.h

/* arch/arm/mach-msm/include/mach/memory.h
 *
 * Copyright (C) 2007 Google, Inc.
 * Copyright (c) 2009-2013, The Linux Foundation. All rights reserved.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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.
 *
 */
#ifndef __ASM_ARCH_MEMORY_H
#define __ASM_ARCH_MEMORY_H
#include <linux/types.h>

/* physical offset of RAM */
#define PLAT_PHYS_OFFSET UL(CONFIG_PHYS_OFFSET)

#define MAX_PHYSMEM_BITS 32
#define SECTION_SIZE_BITS 28

/* Maximum number of Memory Regions
*  The largest system can have 4 memory banks, each divided into 8 regions
*/
#define MAX_NR_REGIONS 32

/* The number of regions each memory bank is divided into */
#define NR_REGIONS_PER_BANK 8

/* Certain configurations of MSM7x30 have multiple memory banks.
*  One or more of these banks can contain holes in the memory map as well.
*  These macros define appropriate conversion routines between the physical
*  and virtual address domains for supporting these configurations using
*  SPARSEMEM and a 3G/1G VM split.
*/

#if defined(CONFIG_ARCH_MSM7X30)

#define EBI0_PHYS_OFFSET PHYS_OFFSET
#define EBI0_PAGE_OFFSET PAGE_OFFSET
#define EBI0_SIZE 0x10000000

#ifndef __ASSEMBLY__

extern unsigned long ebi1_phys_offset;

#define EBI1_PHYS_OFFSET (ebi1_phys_offset)
#define EBI1_PAGE_OFFSET (EBI0_PAGE_OFFSET + EBI0_SIZE)

#if (defined(CONFIG_SPARSEMEM) && defined(CONFIG_VMSPLIT_3G))

#define __phys_to_virt(phys)				\
	((phys) >= EBI1_PHYS_OFFSET ?			\
	(phys) - EBI1_PHYS_OFFSET + EBI1_PAGE_OFFSET :	\
	(phys) - EBI0_PHYS_OFFSET + EBI0_PAGE_OFFSET)

#define __virt_to_phys(virt)				\
	((virt) >= EBI1_PAGE_OFFSET ?			\
	(virt) - EBI1_PAGE_OFFSET + EBI1_PHYS_OFFSET :	\
	(virt) - EBI0_PAGE_OFFSET + EBI0_PHYS_OFFSET)

#endif
#endif

#endif

#ifndef __ASSEMBLY__
void *allocate_contiguous_ebi(unsigned long, unsigned long, int);
unsigned long allocate_contiguous_ebi_nomap(unsigned long, unsigned long);
void clean_and_invalidate_caches(unsigned long, unsigned long, unsigned long);
void clean_caches(unsigned long, unsigned long, unsigned long);
void invalidate_caches(unsigned long, unsigned long, unsigned long);
int msm_get_memory_type_from_name(const char *memtype_name);
unsigned long get_ddr_size(void);

#if defined(CONFIG_ARCH_MSM_ARM11) || defined(CONFIG_ARCH_MSM_CORTEX_A5)
void write_to_strongly_ordered_memory(void);
void map_page_strongly_ordered(void);
#endif

#ifdef CONFIG_CACHE_L2X0
extern void l2x0_cache_sync(void);
#define finish_arch_switch(prev)     do { l2x0_cache_sync(); } while (0)
#endif

#if defined(CONFIG_ARCH_MSM8X60) || defined(CONFIG_ARCH_MSM8960)
extern void store_ttbr0(void);
#define finish_arch_switch(prev)	do { store_ttbr0(); } while (0)
#endif

#define MAX_HOLE_ADDRESS    (PHYS_OFFSET + 0x10000000)
extern phys_addr_t memory_hole_offset;
extern phys_addr_t memory_hole_start;
extern phys_addr_t memory_hole_end;
extern unsigned long memory_hole_align;
extern unsigned long virtual_hole_start;
extern unsigned long virtual_hole_end;
#ifdef CONFIG_DONT_MAP_HOLE_AFTER_MEMBANK0
void find_memory_hole(void);

#define MEM_HOLE_END_PHYS_OFFSET (memory_hole_end)
#define MEM_HOLE_PAGE_OFFSET (PAGE_OFFSET + memory_hole_offset + \
				memory_hole_align)

#define __phys_to_virt(phys)				\
	(unsigned long)\
	((MEM_HOLE_END_PHYS_OFFSET && ((phys) >= MEM_HOLE_END_PHYS_OFFSET)) ? \
	(phys) - MEM_HOLE_END_PHYS_OFFSET + MEM_HOLE_PAGE_OFFSET :	\
	(phys) - PHYS_OFFSET + PAGE_OFFSET)

#define __virt_to_phys(virt)				\
	(unsigned long)\
	((MEM_HOLE_END_PHYS_OFFSET && ((virt) >= MEM_HOLE_PAGE_OFFSET)) ? \
	(virt) - MEM_HOLE_PAGE_OFFSET + MEM_HOLE_END_PHYS_OFFSET :	\
	(virt) - PAGE_OFFSET + PHYS_OFFSET)
#endif

/*
 * Need a temporary unique variable that no one will ever see to
 * hold the compat string. Line number gives this easily.
 * Need another layer of indirection to get __LINE__ to expand
 * properly as opposed to appending and ending up with
 * __compat___LINE__
 */
#define __CONCAT(a, b)	___CONCAT(a, b)
#define ___CONCAT(a, b)	a ## b

#define EXPORT_COMPAT(com)	\
static char *__CONCAT(__compat_, __LINE__)  __used \
	__attribute((__section__(".exportcompat.init"))) = com

extern char *__compat_exports_start[];
extern char *__compat_exports_end[];

#endif

#if defined CONFIG_ARCH_MSM_SCORPION || defined CONFIG_ARCH_MSM_KRAIT
#define arch_has_speculative_dfetch()	1
#endif

#endif

/* these correspond to values known by the modem */
#define MEMORY_DEEP_POWERDOWN	0
#define MEMORY_SELF_REFRESH	1
#define MEMORY_ACTIVE		2

#define NPA_MEMORY_NODE_NAME	"/mem/apps/ddr_dpd"

#ifndef CONFIG_ARCH_MSM7X27
#define CONSISTENT_DMA_SIZE	(SZ_1M * 14)

#endif