sparc64 really implement itlb/dtlb automatic replacement writes

- implement "used" bit in tlb translation entry
- mark tlb entry used if qemu code/data translation succeeds
- fold i/d mmu replacement writes code into replace_tlb_1bit_lru which
adds 1bit lru replacement algorithm; previously code tried to replace
first unlocked entry only

- extract more bitmasks to named macros
- add "immu" or "dmmu" type name to debugging output where appropriate

Signed-off-by: igor.v.kovalenko@gmail.com

--
Kind regards,
Igor V. Kovalenko

1 files changed, 11 insertions, 0 deletions

diff --git a/target-sparc/cpu.h b/target-sparc/cpu.h
index 98c185f001..490fd7b57f 100644
--- a/target-sparc/cpu.h
+++ b/target-sparc/cpu.h
@@ -273,6 +273,17 @@ enum {
 };
 #endif
 
+#define TTE_VALID_BIT       (1ULL << 63)
+#define TTE_USED_BIT        (1ULL << 41)
+#define TTE_LOCKED_BIT      (1ULL <<  6)
+
+#define TTE_IS_VALID(tte)   ((tte) & TTE_VALID_BIT)
+#define TTE_IS_USED(tte)    ((tte) & TTE_USED_BIT)
+#define TTE_IS_LOCKED(tte)  ((tte) & TTE_LOCKED_BIT)
+
+#define TTE_SET_USED(tte)   ((tte) |= TTE_USED_BIT)
+#define TTE_SET_UNUSED(tte) ((tte) &= ~TTE_USED_BIT)
+
 typedef struct SparcTLBEntry {
     uint64_t tag;
     uint64_t tte;