diff options
| author | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-08-22 08:57:52 +0000 |
|---|---|---|
| committer | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-08-22 08:57:52 +0000 |
| commit | 06afe2c8840ec39c3b23db0eb830a5f49244b947 (patch) | |
| tree | 7f3c1a89f27b7f7e5da3bd1e7750414993f8c651 /hw/sh7750.c | |
| parent | 29e179bc3f5e804ab58b975e65c91cb9cd287846 (diff) | |
[sh4] MMU bug fix
Some bugs on SH4 MMU are fixed.
- When a TLB entry is overwritten or invalidated, tlb_flush_page() should be
invoked to invalidate old entry.
- When a ASID is changed, tlb_flush() should be invoke to invalidate entries
which have old ASID.
- The check for shared bit in TLB entry causes multiple TLB hit exception.
As SH3's MMU, shared bit is ignored.
- ASID is used when MMUCR's SV bit or SR's MD bit is zero.
No need to check both bits are zero.
(Shin-ichiro KAWASAKI)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5068 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'hw/sh7750.c')
| -rw-r--r-- | hw/sh7750.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/sh7750.c b/hw/sh7750.c index 0ff3e6d77..04a743753 100644 --- a/hw/sh7750.c +++ b/hw/sh7750.c @@ -30,6 +30,7 @@ #include "sh7750_regs.h" #include "sh7750_regnames.h" #include "sh_intc.h" +#include "exec-all.h" #include "cpu.h" #define NB_DEVICES 4 @@ -356,6 +357,9 @@ static void sh7750_mem_writel(void *opaque, target_phys_addr_t addr, s->cpu->mmucr = mem_value; return; case SH7750_PTEH_A7: + /* If asid changes, clear all registered tlb entries. */ + if ((s->cpu->pteh & 0xff) != (mem_value & 0xff)) + tlb_flush(s->cpu, 1); s->cpu->pteh = mem_value; return; case SH7750_PTEL_A7: |