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Remove IO_MEM_SHIFT

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We no longer use any of the lower bits of a ram_addr, so we might as well
use them for the io table index.  This increases the number of potential
I/O handlers by a factor of 8.

Signed-off-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Avi Kivity
2012-01-02 17:21:07 +02:00
parent 75c578dcaa
commit 11c7ef0c73
4 changed files with 17 additions and 23 deletions
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2
cpu-all.h
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@@ -503,7 +503,7 @@ extern int mem_prealloc;
3 flags. The ROMD code stores the page ram offset in iotlb entry,
so only a limited number of ids are avaiable. */
#define IO_MEM_NB_ENTRIES (1 << (TARGET_PAGE_BITS - IO_MEM_SHIFT))
#define IO_MEM_NB_ENTRIES (1 << TARGET_PAGE_BITS)
/* Flags stored in the low bits of the TLB virtual address. These are
defined so that fast path ram access is all zeros. */