Changeset c520034 in mainline for kernel/generic/include


Ignore:
Timestamp:
2011-12-31T18:19:35Z (14 years ago)
Author:
Jakub Jermar <jakub@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
295f658, 77c2b02, 96cd5b4
Parents:
852052d (diff), 22f0561 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.
Message:

Support for kernel non-identity mappings, phase I.

  • identity/non-identity kernel memory split on all architectures
  • low/high physical memory split on all architectures
  • frame allocator understands low/high memory
  • high physical memory currently unused (Phase II)
  • more compact frame_t
  • zone conf frames, pte_t, kernel stacks allocated from low memory
  • lockless TLB-miss handlers everywhere (newly sparc64, ia64)
  • preallocate PTL1 page tables for non-identity and prevent their deallocation
  • hw_map() unification
  • new resource allocator used for allocating kernel virtual addresses

Breakage:

  • sparc64/sun4v creates too large kernel identity; not fixed because of lack of testing hw
  • ppc32's tlb_refill() seems wrong as it creates too large kernel identity, but appears unused and the architecture works normally

Not implemented yet (phase II):

  • allow high memory to be used for common kernel allocations
Location:
kernel/generic/include
Files:
2 added
5 edited

Legend:

Unmodified
Added
Removed

  • kernel/generic/include/align.h

    r852052d rc520034  
    4242 *
    4343 * @param s Address or size to be aligned.
    44  * @param a Size of alignment, must be power of 2.
     44 * @param a Size of alignment, must be a power of 2.
    4545 */
    4646#define ALIGN_DOWN(s, a)  ((s) & ~((a) - 1))
    … …  
    5050 *
    5151 * @param s Address or size to be aligned.
    52  * @param a Size of alignment, must be power of 2.
     52 * @param a Size of alignment, must be a power of 2.
    5353 */
    5454#define ALIGN_UP(s, a)  (((s) + ((a) - 1)) & ~((a) - 1))
     55
     56/** Check alignment.
     57 *
     58 * @param s Address or size to be checked for alignment.
     59 * @param a Size of alignment, must be a power of 2.
     60 */
     61#define IS_ALIGNED(s, a)        (ALIGN_UP((s), (a)) == (s))
    5562
    5663#endif

  • kernel/generic/include/config.h

    r852052d rc520034  
    7474
    7575typedef struct {
    76         unsigned int cpu_count;      /**< Number of processors detected. */
    77         volatile size_t cpu_active;  /**< Number of processors that are up and running. */
     76        /** Number of processors detected. */
     77        unsigned int cpu_count;
     78        /** Number of processors that are up and running. */
     79        volatile size_t cpu_active;
    7880       
    7981        uintptr_t base;
    80         size_t kernel_size;          /**< Size of memory in bytes taken by kernel and stack */
     82        /** Size of memory in bytes taken by kernel and stack. */
     83        size_t kernel_size;
    8184       
    82         uintptr_t stack_base;        /**< Base adddress of initial stack */
    83         size_t stack_size;           /**< Size of initial stack */
     85        /** Base adddress of initial stack. */
     86        uintptr_t stack_base;
     87        /** Size of initial stack. */
     88        size_t stack_size;
     89
     90        bool identity_configured;
     91        /** Base address of the kernel identity mapped memory. */
     92        uintptr_t identity_base;
     93        /** Size of the kernel identity mapped memory. */
     94        size_t identity_size;
     95
     96        bool non_identity_configured;   
     97
     98        /** End of physical memory. */
     99        uint64_t physmem_end;
    84100} config_t;
    85101

  • kernel/generic/include/macros.h

    r852052d rc520034  
    7777#endif /* __ASM__ */
    7878
     79#define ispwr2(x)       (((x) & ((x) - 1)) == 0)
     80
    7981#define isdigit(d)     (((d) >= '0') && ((d) <= '9'))
    8082#define islower(c)     (((c) >= 'a') && ((c) <= 'z'))

  • kernel/generic/include/mm/frame.h

    r852052d rc520034  
    5050typedef uint8_t frame_flags_t;
    5151
     52#define FRAME_NONE        0x0
    5253/** Convert the frame address to kernel VA. */
    5354#define FRAME_KA          0x1
    … …  
    5859/** Do not reserve / unreserve memory. */
    5960#define FRAME_NO_RESERVE  0x8
     61/** Allocate a frame which can be identity-mapped. */
     62#define FRAME_LOWMEM      0x10
     63/** Allocate a frame which cannot be identity-mapped. */
     64#define FRAME_HIGHMEM     0x20
    6065
    6166typedef uint8_t zone_flags_t;
    6267
     68#define ZONE_NONE       0x0
    6369/** Available zone (free for allocation) */
    64 #define ZONE_AVAILABLE  0x0
     70#define ZONE_AVAILABLE  0x1
    6571/** Zone is reserved (not available for allocation) */
    66 #define ZONE_RESERVED   0x8
     72#define ZONE_RESERVED   0x2
    6773/** Zone is used by firmware (not available for allocation) */
    68 #define ZONE_FIRMWARE   0x10
     74#define ZONE_FIRMWARE   0x4
     75/** Zone contains memory that can be identity-mapped */
     76#define ZONE_LOWMEM     0x8
     77/** Zone contains memory that cannot be identity-mapped */
     78#define ZONE_HIGHMEM    0x10
    6979
    70 /** Currently there is no equivalent zone flags
    71     for frame flags */
    72 #define FRAME_TO_ZONE_FLAGS(frame_flags)  0
     80/** Mask of zone bits that must be matched exactly. */
     81#define ZONE_EF_MASK    0x7
     82
     83#define FRAME_TO_ZONE_FLAGS(ff) \
     84        ((((ff) & FRAME_LOWMEM) ? ZONE_LOWMEM : \
     85            (((ff) & FRAME_HIGHMEM) ? ZONE_HIGHMEM : ZONE_NONE)) | \
     86            (ZONE_AVAILABLE | ZONE_LOWMEM /* | ZONE_HIGHMEM */))
     87
     88#define ZONE_FLAGS_MATCH(zf, f) \
     89        (((((zf) & ZONE_EF_MASK)) == ((f) & ZONE_EF_MASK)) && \
     90            (((zf) & ~ZONE_EF_MASK) & (f)))
    7391
    7492typedef struct {
    7593        size_t refcount;      /**< Tracking of shared frames */
    76         uint8_t buddy_order;  /**< Buddy system block order */
    7794        link_t buddy_link;    /**< Link to the next free block inside
    7895                                   one order */
    7996        void *parent;         /**< If allocated by slab, this points there */
     97        uint8_t buddy_order;  /**< Buddy system block order */
    8098} frame_t;
    8199
    … …  
    129147}
    130148
    131 NO_TRACE static inline bool zone_flags_available(zone_flags_t flags)
    132 {
    133         return ((flags & (ZONE_RESERVED | ZONE_FIRMWARE)) == 0);
    134 }
    135 
    136149#define IS_BUDDY_ORDER_OK(index, order) \
    137150    ((~(((sysarg_t) -1) << (order)) & (index)) == 0)
    … …  
    146159
    147160extern void frame_init(void);
     161extern bool frame_adjust_zone_bounds(bool, uintptr_t *, size_t *);
    148162extern void *frame_alloc_generic(uint8_t, frame_flags_t, size_t *);
    149163extern void *frame_alloc(uint8_t, frame_flags_t);
    … …  
    161175extern void frame_mark_unavailable(pfn_t, size_t);
    162176extern size_t zone_conf_size(size_t);
     177extern pfn_t zone_external_conf_alloc(size_t);
    163178extern bool zone_merge(size_t, size_t);
    164179extern void zone_merge_all(void);

  • kernel/generic/include/mm/page.h

    r852052d rc520034  
    4949        void (* mapping_remove)(as_t *, uintptr_t);
    5050        pte_t *(* mapping_find)(as_t *, uintptr_t, bool);
     51        void (* mapping_make_global)(uintptr_t, size_t);
    5152} page_mapping_operations_t;
    5253
    … …  
    6061extern void page_mapping_remove(as_t *, uintptr_t);
    6162extern pte_t *page_mapping_find(as_t *, uintptr_t, bool);
     63extern void page_mapping_make_global(uintptr_t, size_t);
    6264extern pte_t *page_table_create(unsigned int);
    6365extern void page_table_destroy(pte_t *);
Note: See TracChangeset for help on using the changeset viewer.