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46937eab88
It turned out we used one version of kmalloc for malloc() and another for kfree()! Now fixed. Added parent-child relationship to tasks. Need to polish handling CLONE_PARENT and THREAD.
135 lines
4.2 KiB
C
135 lines
4.2 KiB
C
/*
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* Includes memory-related architecture specific definitions and their
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* corresponding generic wrappers.
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*
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* Copyright (C) 2007 Bahadir Balban
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*/
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#ifndef __GLUE_ARM_MEMORY_H__
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#define __GLUE_ARM_MEMORY_H__
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#include INC_ARCH(bootdesc.h) /* Definition of last loaded svc image address */
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#include INC_GLUE(memlayout.h) /* Important generic definitions */
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#include INC_SUBARCH(mm.h)
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/* Generic definitions */
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#define PAGE_SIZE ARM_PAGE_SIZE
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#define PAGE_MASK ARM_PAGE_MASK
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#define PAGE_BITS ARM_PAGE_BITS
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/*
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* This defines the largest size defined by this architecture that is
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* easily mappable. ARM supports 1MB mappings so it fits well. If it's
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* unsupported by the arch then a reasonable size could be 1MB.
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*/
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#define SECTION_SIZE ARM_SECTION_SIZE
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#define SECTION_MASK ARM_SECTION_MASK
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#define SECTION_BITS ARM_SECTION_BITS
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/* Aligns to the upper page (ceiling) FIXME: Must add a wraparound checker. */
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#define page_align_up(addr) ((((unsigned int)(addr)) + \
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(PAGE_SIZE - 1)) & \
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(~PAGE_MASK))
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/* Aligns to the lower page (floor) */
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#define page_align(addr) (((unsigned int)(addr)) & \
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(~PAGE_MASK))
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#define is_aligned(val, mask) (!(((unsigned long)(val)) & mask))
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#define is_page_aligned(val) (!(((unsigned long)(val)) & PAGE_MASK))
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#define page_boundary(x) is_page_aligned(x)
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/* Align to given size */
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#define align(addr, size) (((unsigned int)(addr)) & (~(size-1)))
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/* The bytes left until the end of the page that x is in */
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#define TILL_PAGE_ENDS(x) (PAGE_SIZE - ((unsigned long)(x) & PAGE_MASK))
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/* Extract page frame number from address and vice versa. */
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#define __pfn(x) (((unsigned long)(x)) >> PAGE_BITS)
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#define __pfn_to_addr(x) (((unsigned long)(x)) << PAGE_BITS)
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/* Extract physical address from page table entry (pte) */
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#define __pte_to_addr(x) (((unsigned long)(x)) & ~PAGE_MASK)
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/* Minimum excess needed for word alignment */
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#define SZ_WORD sizeof(unsigned int)
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#define WORD_BITS 32
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#define WORD_BITS_LOG2 5
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#define BITWISE_GETWORD(x) ((x) >> WORD_BITS_LOG2) /* Divide by 32 */
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#define BITWISE_GETBIT(x) (1 << ((x) % WORD_BITS))
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#define align_up(addr, size) ((((unsigned long)(addr)) + ((size) - 1)) & (~((size) - 1)))
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/* Endianness conversion */
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static inline void be32_to_cpu(unsigned int x)
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{
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char *p = (char *)&x;
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char tmp;
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/* Swap bytes */
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tmp = p[0];
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p[0] = p[3];
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p[3] = tmp;
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tmp = p[1];
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p[1] = p[2];
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p[2] = tmp;
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}
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/* Some anticipated values in terms of memory consumption */
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#define TASK_AVERAGE_SIZE SZ_16MB
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#define TASKS_PER_1MB_GRANT 28
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extern pgd_table_t kspace;
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extern pmd_table_t pmd_tables[];
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extern unsigned long pmdtab_i;
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void init_pmd_tables(void);
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pmd_table_t *alloc_boot_pmd(void);
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/*
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* Each time a pager grants memory to the kernel, these parameters are called
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* for in order to distribute the granted memory for different purposes.
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*
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* The granted memory is used in an architecture-specific way, e.g. for pgds,
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* pmds, and kernel stack. Therefore this should be defined per-arch.
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*/
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typedef struct grant_kmem_usage {
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unsigned long total_size;
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unsigned long total_tasks;
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unsigned long total_pgds;
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unsigned long total_pmds;
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unsigned long total_tcbs;
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unsigned long extra;
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} grant_kmem_usage_t;
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void paging_init(void);
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void init_pmd_tables(void);
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void init_clear_ptab(void);
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unsigned int space_flags_to_ptflags(unsigned int flags);
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void add_boot_mapping(unsigned int paddr, unsigned int vaddr,
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unsigned int size, unsigned int flags);
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void add_mapping_pgd(unsigned int paddr, unsigned int vaddr,
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unsigned int size, unsigned int flags,
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pgd_table_t *pgd);
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void add_mapping(unsigned int paddr, unsigned int vaddr,
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unsigned int size, unsigned int flags);
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int remove_mapping(unsigned long vaddr);
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int remove_mapping_pgd(unsigned long vaddr, pgd_table_t *pgd);
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int remove_mapping_pgd_all_user(pgd_table_t *pgd);
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void prealloc_phys_pagedesc(void);
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int check_mapping_pgd(unsigned long vaddr, unsigned long size,
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unsigned int flags, pgd_table_t *pgd);
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int check_mapping(unsigned long vaddr, unsigned long size,
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unsigned int flags);
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void copy_pgd_kern_all(pgd_table_t *);
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pte_t virt_to_pte(unsigned long virtual);
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pte_t virt_to_pte_from_pgd(unsigned long virtual, pgd_table_t *pgd);
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#endif /* __GLUE_ARM_MEMORY_H__ */
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