[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH] cpu_defs: Simplify CPUTLB padding logic
From: |
Peter Crosthwaite |
Subject: |
[Qemu-devel] [PATCH] cpu_defs: Simplify CPUTLB padding logic |
Date: |
Sun, 5 Jul 2015 14:08:53 -0700 |
There was a complicated subtractive arithmetic for determining the
padding on the CPUTLBEntry structure. Simplify this with a union.
Signed-off-by: Peter Crosthwaite <address@hidden>
---
include/exec/cpu-defs.h | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h
index 98b9cff..5093be2 100644
--- a/include/exec/cpu-defs.h
+++ b/include/exec/cpu-defs.h
@@ -105,17 +105,18 @@ typedef struct CPUTLBEntry {
bit 3 : indicates that the entry is invalid
bit 2..0 : zero
*/
- target_ulong addr_read;
- target_ulong addr_write;
- target_ulong addr_code;
- /* Addend to virtual address to get host address. IO accesses
- use the corresponding iotlb value. */
- uintptr_t addend;
- /* padding to get a power of two size */
- uint8_t dummy[(1 << CPU_TLB_ENTRY_BITS) -
- (sizeof(target_ulong) * 3 +
- ((-sizeof(target_ulong) * 3) & (sizeof(uintptr_t) - 1)) +
- sizeof(uintptr_t))];
+ union {
+ struct {
+ target_ulong addr_read;
+ target_ulong addr_write;
+ target_ulong addr_code;
+ /* Addend to virtual address to get host address. IO accesses
+ use the corresponding iotlb value. */
+ uintptr_t addend;
+ };
+ /* padding to get a power of two size */
+ uint8_t dummy[1 << CPU_TLB_ENTRY_BITS];
+ };
} CPUTLBEntry;
QEMU_BUILD_BUG_ON(sizeof(CPUTLBEntry) != (1 << CPU_TLB_ENTRY_BITS));
--
1.9.1
- [Qemu-devel] [PATCH] cpu_defs: Simplify CPUTLB padding logic,
Peter Crosthwaite <=