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target/openrisc: Reorg tlb lookup

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While openrisc has a split i/d tlb, qemu does not.  Perform a
lookup on both i & d tlbs in parallel and put the composite
rights into qemu's tlb.  This avoids ping-ponging the qemu tlb
between EXEC and READ.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Stafford Horne <shorne@gmail.com>
This commit is contained in:
Richard Henderson 2018-05-22 23:14:02 -07:00 • committed by Stafford Horne
parent 1cc9e5d896
commit f0655423ca
2 changed files with 90 additions and 172 deletions
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8
target/openrisc/cpu.h
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@ -237,14 +237,6 @@ enum {
UXE = (1 << 7),
};
/* check if tlb available */
enum {
TLBRET_INVALID = -3,
TLBRET_NOMATCH = -2,
TLBRET_BADADDR = -1,
TLBRET_MATCH = 0
};
typedef struct OpenRISCTLBEntry {
uint32_t mr;
uint32_t tr;