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/*

 * Memory related definitions for test purposes.

 *

 * Copyright (C) 2007 Bahadir Balban

 *

 */

#ifndef __GLUE_TEST_MEMORY_H__

#define __GLUE_TEST_MEMORY_H__

/* ARM specific definitions */

#define TEST_SECTION_SIZE               SZ_1MB

//#define TEST_PAGE_SIZE                        SZ_4K

//#define TEST_PAGE_MASK                        0xFFF

//#define TEST_PAGE_BITS                        12

#define TEST_PAGE_SIZE                  128

#define TEST_PAGE_MASK                  (TEST_PAGE_SIZE-1)

#define TEST_PAGE_BITS                  7

#define TEST_SECTION_MASK               0xFFFFF

/* Aligns to the upper page (ceiling) */

#define page_align_up(addr)             ((((unsigned int)(addr)) + \

                                          (PAGE_SIZE - 1)) & \

                                         (~PAGE_MASK))

/* Aligns to the lower page (floor) */

#define page_align(addr)                (((unsigned int)(addr)) &  \

                                         (~PAGE_MASK))

/* Align to given size */

#define align(addr, size)               (((unsigned int)(addr)) & (~(size-1)))

/* Extract page frame number from address */

#define __pfn(x)                (((unsigned long)(x)) >> PAGE_BITS)

#define __pfn_to_addr(x)        (((unsigned long)(x)) << PAGE_BITS)

/* Extract physical address from page table entry (pte) */

#define __pte_to_addr(x)        (((unsigned long)(x)) & ~PAGE_MASK)

/* Minimum excess needed for word alignment */

#define SZ_WORD                         sizeof(unsigned long)

#define WORD_BITS                       32

#define BITWISE_GETWORD(x)      ((x) >> 5) /* Divide by 32 */

#define BITWISE_GETBIT(x)       (1 << ((x) % WORD_BITS))

#define align_up(addr, size)            ((((unsigned long)(addr)) + ((size) - 1)) & (~((size) - 1)))

/* Generic definitions */

extern unsigned int PAGE_SIZE;

extern unsigned int PAGE_MASK;

extern unsigned int PAGE_BITS;

/* Type-checkable page table elements */

typedef u32 pgd_t;

typedef u32 pmd_t;

typedef u32 pte_t;

/* Page global directory made up of pgd_t entries */

typedef struct pgd_table {

        pgd_t entry[SZ_4K];

} pgd_table_t;

/* Page middle directory made up of pmd_t entries */

typedef struct pmd_table {

        pmd_t entry[256];

} pmd_table_t;

/* Number of pmd tables to describe all physical memory.

 * TODO: Need more for IO etc. */

#define NUM_PMD_TABLES  ((PHYS_MEM_END - PHYS_MEM_START) / PAGE_SIZE) \

                        / PMD_NUM_PAGES

/* Page table related */

extern pgd_table_t kspace;

extern pmd_table_t pmd_tables[];

extern unsigned long pmdtab_i;

void paging_init(void);

void init_clear_ptab(void);

#endif /* __GLUE_TEST_MEMORY_H__ */