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Implement multi-level page tables.

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Define L1_MAP_ADDR_SPACE_BITS to be either the virtual address size
(in user mode) or physical address size (in system mode), and use
that to size l1_map.  This rewrites page_find_alloc, page_flush_tb,
and walk_memory_regions.

Use TARGET_PHYS_ADDR_SPACE_BITS for the physical memory map based
off of l1_phys_map.  This rewrites page_phys_find_alloc and
phys_page_for_each.

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2010-03-10 15:53:37 -08:00 • committed by Paul Brook
parent 14f24e1465
commit 5cd2c5b6ad
2 changed files with 280 additions and 182 deletions
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7
cpu-all.h
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@ -745,8 +745,11 @@ extern unsigned long qemu_host_page_mask;
#define PAGE_RESERVED 0x0020
void page_dump(FILE *f);
int walk_memory_regions(void *,
int (*fn)(void *, unsigned long, unsigned long, unsigned long));
typedef int (*walk_memory_regions_fn)(void *, unsigned long,
unsigned long, unsigned long);
int walk_memory_regions(void *, walk_memory_regions_fn);
int page_get_flags(target_ulong address);
void page_set_flags(target_ulong start, target_ulong end, int flags);
int page_check_range(target_ulong start, target_ulong len, int flags);