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authorDavid Gibson <david@gibson.dropbear.id.au>2011-04-01 15:15:14 +1100
committerAlexander Graf <agraf@suse.de>2011-04-01 18:34:55 +0200
commit8500e3a91292f253002783da267f3b08aead86c1 (patch)
tree8f75bfb98b887f439e0d7c55b5aedc7894ec839c /target-ppc/helper.c
parenteaabeef2688cdc7da462e9389fce64b1178de8ce (diff)
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Clean up slb_lookup() function
The slb_lookup() function, used in the ppc translation path returns a number of slb entry fields in reference parameters. However, only one of the two callers of slb_lookup() actually wants this information. This patch, therefore, makes slb_lookup() return a simple pointer to the located SLB entry (or NULL), and the caller which needs the fields can extract them itself. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-ppc/helper.c')
-rw-r--r--target-ppc/helper.c45
1 files changed, 18 insertions, 27 deletions
diff --git a/target-ppc/helper.c b/target-ppc/helper.c
index b9621d2..7ca33cb 100644
--- a/target-ppc/helper.c
+++ b/target-ppc/helper.c
@@ -676,9 +676,7 @@ static inline int find_pte(CPUState *env, mmu_ctx_t *ctx, int h, int rw,
}
#if defined(TARGET_PPC64)
-static inline int slb_lookup(CPUPPCState *env, target_ulong eaddr,
- target_ulong *vsid, target_ulong *page_mask,
- int *attr, int *target_page_bits)
+static inline ppc_slb_t *slb_lookup(CPUPPCState *env, target_ulong eaddr)
{
uint64_t esid;
int n;
@@ -693,19 +691,11 @@ static inline int slb_lookup(CPUPPCState *env, target_ulong eaddr,
LOG_SLB("%s: slot %d %016" PRIx64 " %016"
PRIx64 "\n", __func__, n, slb->esid, slb->vsid);
if (slb->esid == esid) {
- *vsid = (slb->vsid & SLB_VSID_VSID) >> SLB_VSID_SHIFT;
- *page_mask = ~SEGMENT_MASK_256M;
- *attr = slb->vsid & SLB_VSID_ATTR;
- if (target_page_bits) {
- *target_page_bits = (slb->vsid & SLB_VSID_L)
- ? TARGET_PAGE_BITS_16M
- : TARGET_PAGE_BITS;
- }
- return n;
+ return slb;
}
}
- return -5;
+ return NULL;
}
void ppc_slb_invalidate_all (CPUPPCState *env)
@@ -732,18 +722,13 @@ void ppc_slb_invalidate_all (CPUPPCState *env)
void ppc_slb_invalidate_one (CPUPPCState *env, uint64_t T0)
{
- target_ulong vsid, page_mask;
- int attr;
- int n;
ppc_slb_t *slb;
- n = slb_lookup(env, T0, &vsid, &page_mask, &attr, NULL);
- if (n < 0) {
+ slb = slb_lookup(env, T0);
+ if (!slb) {
return;
}
- slb = &env->slb[n];
-
if (slb->esid & SLB_ESID_V) {
slb->esid &= ~SLB_ESID_V;
@@ -822,16 +807,22 @@ static inline int get_segment(CPUState *env, mmu_ctx_t *ctx,
pr = msr_pr;
#if defined(TARGET_PPC64)
if (env->mmu_model & POWERPC_MMU_64) {
- int attr;
+ ppc_slb_t *slb;
LOG_MMU("Check SLBs\n");
- ret = slb_lookup(env, eaddr, &vsid, &page_mask, &attr,
- &target_page_bits);
- if (ret < 0)
- return ret;
- ctx->key = !!(pr ? (attr & SLB_VSID_KP) : (attr & SLB_VSID_KS));
+ slb = slb_lookup(env, eaddr);
+ if (!slb) {
+ return -5;
+ }
+
+ vsid = (slb->vsid & SLB_VSID_VSID) >> SLB_VSID_SHIFT;
+ page_mask = ~SEGMENT_MASK_256M;
+ target_page_bits = (slb->vsid & SLB_VSID_L)
+ ? TARGET_PAGE_BITS_16M : TARGET_PAGE_BITS;
+ ctx->key = !!(pr ? (slb->vsid & SLB_VSID_KP)
+ : (slb->vsid & SLB_VSID_KS));
ds = 0;
- ctx->nx = !!(attr & SLB_VSID_N);
+ ctx->nx = !!(slb->vsid & SLB_VSID_N);
ctx->eaddr = eaddr;
vsid_mask = 0x00003FFFFFFFFF80ULL;
vsid_sh = 7;