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[Qemu-ppc] [PATCH v2] target-ppc: Eliminate redundant and incorrect func
From: |
Aaron Larson |
Subject: |
[Qemu-ppc] [PATCH v2] target-ppc: Eliminate redundant and incorrect function booke206_page_size_to_tlb |
Date: |
Tue, 28 Jun 2016 06:50:05 -0700 |
Eliminate redundant and incorrect booke206_page_size_to_tlb function
from ppce500_spin.c in preference to previously existing but newly
exported definition from e500.c
Defect analysis:
The booke206_page_size_to_tlb function in e500.c was updated in commit
2bd9543 "ppc: booke206: use MAV=2.0 TSIZE definition, fix 4G pages" to
reflect a change in the definition of MAS1_TSIZE_SHIFT from 8
(corresponding to a min TLB page size of 4kb) to a value of 7 (TLB
page size 2k). The booke206_page_size_to_tlb() function defined in
ppce500_spin.c was never updated to reflect the change in
MAS1_TSIZE_SHIFT.
In http://lists.nongnu.org/archive/html/qemu-ppc/2016-06/msg00533.html,
Scott Wood suggested this "root cause" explanation:
SW> The patch that changed MAS1_TSIZE_SHIFT from 8 to 7 was around the
SW> same time as the patch that added this code, which is probably why
SW> adjusting it got missed. Commit 2bd9543cd3 did update the
SW> equivalent code in ppce500_mpc8544ds.c, which now resides in
SW> hw/ppc/e500.c and has been changed to not assume a power-of-2
SW> size. The ppce500_spin version should be eliminated.
Signed-off-by: Aaron Larson <address@hidden>
---
hw/ppc/e500.c | 2 +-
hw/ppc/e500.h | 2 ++
hw/ppc/ppce500_spin.c | 7 +------
3 files changed, 4 insertions(+), 7 deletions(-)
diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
index ee1c60b..0cd534d 100644
--- a/hw/ppc/e500.c
+++ b/hw/ppc/e500.c
@@ -601,7 +601,7 @@ static int ppce500_prep_device_tree(MachineState *machine,
}
/* Create -kernel TLB entries for BookE. */
-static inline hwaddr booke206_page_size_to_tlb(uint64_t size)
+hwaddr booke206_page_size_to_tlb(uint64_t size)
{
return 63 - clz64(size >> 10);
}
diff --git a/hw/ppc/e500.h b/hw/ppc/e500.h
index ef224ea..70ba1d8 100644
--- a/hw/ppc/e500.h
+++ b/hw/ppc/e500.h
@@ -26,4 +26,6 @@ typedef struct PPCE500Params {
void ppce500_init(MachineState *machine, PPCE500Params *params);
+hwaddr booke206_page_size_to_tlb(uint64_t size);
+
#endif
diff --git a/hw/ppc/ppce500_spin.c b/hw/ppc/ppce500_spin.c
index 225177b..22c584e 100644
--- a/hw/ppc/ppce500_spin.c
+++ b/hw/ppc/ppce500_spin.c
@@ -32,6 +32,7 @@
#include "sysemu/sysemu.h"
#include "hw/sysbus.h"
#include "sysemu/kvm.h"
+#include "e500.h"
#define MAX_CPUS 32
@@ -72,12 +73,6 @@ static void spin_reset(void *opaque)
}
}
-/* Create -kernel TLB entries for BookE, linearly spanning 256MB. */
-static inline hwaddr booke206_page_size_to_tlb(uint64_t size)
-{
- return ctz32(size >> 10) >> 1;
-}
-
static void mmubooke_create_initial_mapping(CPUPPCState *env,
target_ulong va,
hwaddr pa,
--
2.7.4
- [Qemu-ppc] [PATCH v2] target-ppc: Eliminate redundant and incorrect function booke206_page_size_to_tlb,
Aaron Larson <=