diff options
| author | Aaron Larson <alarson@ddci.com> | 2016-06-28 06:50:05 -0700 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2016-07-01 09:57:01 +1000 |
| commit | a36848ff7ca54d9181ec6c2202ce7563a2c5cfdc (patch) | |
| tree | 53025f73cfc3eaab1d516f64e64aba25ba6f130b | |
| parent | ff461b8da9d3444bf1c33a9a94edcf88435c4268 (diff) | |
target-ppc: Eliminate redundant and incorrect function booke206_page_size_to_tlb
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 <alarson@ddci.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
| -rw-r--r-- | hw/ppc/e500.c | 2 | ||||
| -rw-r--r-- | hw/ppc/e500.h | 2 | ||||
| -rw-r--r-- | 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 ee1c60b820..0cd534df55 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 ef224ea5e6..70ba1d8f4f 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 225177b5af..22c584eb8d 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, |