32fbbd370c
shared with the kernel, mapped into kernel address space; kernel is notified of its location. kernel segment size is increased to make it fit. - map in kernel and other processes that don't have their own page table using single 4MB (global) mapping. - new sanity check facility: objects that are allocated with the slab allocator are, when running with sanity checking on, marked readonly until they are explicitly unlocked using the USE() macro. - another sanity check facility: collect all uses of memory and see if they don't overlap with (a) eachother and (b) free memory - own munmap() and munmap_text() functions. - exec() recovers from out-of-memory conditions properly now; this solves some weird exec() behaviour - chew off memory from the same side of the chunk as where we start scanning, solving some memory fragmentation issues - use avl trees for freelist and phys_ranges in regions - implement most useful part of munmap() - remap() stuff is GQ's for shared memory
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
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#define NO_MEM ((phys_clicks) 0) /* returned by alloc_mem() with mem is up */
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/* Memory flags to pt_allocmap() and alloc_mem(). */
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#define PAF_CLEAR 0x01 /* Clear physical memory. */
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#define PAF_CONTIG 0x02 /* Physically contiguous. */
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#define PAF_ALIGN64K 0x04 /* Aligned to 64k boundary. */
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#define PAF_LOWER16MB 0x08
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#define PAF_LOWER1MB 0x10
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/* special value for v in pt_allocmap */
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#define AM_AUTO ((u32_t) -1)
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#define CLICK2ABS(v) ((v) << CLICK_SHIFT)
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#define ABS2CLICK(a) ((a) >> CLICK_SHIFT)
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/* Compile in asserts and custom sanity checks at all? */
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#define SANITYCHECKS 0
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#define VMSTATS 0
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/* Minimum stack region size - 64MB. */
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#define MINSTACKREGION (64*1024*1024)
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/* If so, this level: */
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#define SCL_NONE 0 /* No sanity checks - vm_assert()s only. */
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#define SCL_TOP 1 /* Main loop and other high-level places. */
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#define SCL_FUNCTIONS 2 /* Function entry/exit. */
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#define SCL_DETAIL 3 /* Detailled steps. */
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#define SCL_MAX 3 /* Highest value. */
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/* Type of page allocations. */
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#define VMP_SPARE 0
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#define VMP_PAGETABLE 1
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#define VMP_PAGEDIR 2
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#define VMP_SLAB 3
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#define VMP_CATEGORIES 4
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/* Flags to pt_writemap(). */
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#define WMF_OVERWRITE 0x01 /* Caller knows map may overwrite. */
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#define WMF_WRITEFLAGSONLY 0x02 /* Copy physaddr and update flags. */
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#define WMF_FREE 0x04 /* Free pages overwritten. */
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#define MAP_NONE 0xFFFFFFFE
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