[Qemu-ppc] [PATCH 48/48] target-ppc: Use QOM method dispatch for MMU fault handling

[David Gibson]

After previous cleanups, the many scattered checks of env->mmu_model in
the ppc MMU implementation have, at least for "classic" hash MMUs been
reduced (almost) to a single switch at the top of
cpu_ppc_handle_mmu_fault().

An explicit switch is still a pretty ugly way of handling this though.  Now
that Andreas Färber's CPU QOM cleanups for ppc have gone in, it's quite
straightforward to instead make the handle_mmu_fault function a QOM method
on the CPU object.

This patch implements such a scheme, initializing the method pointer at
the same time as the mmu_model variable.  We need to keep the latter around
for now, because of the MMU types (BookE, 4xx, et al) which haven't been
converted to the new scheme yet, and also for a few other uses.  It would
be good to clean those up eventually.

Signed-off-by: David Gibson <address@hidden>
---
 target-ppc/cpu-qom.h        |    4 ++++
 target-ppc/mmu_helper.c     |   24 +++++++-----------------
 target-ppc/translate_init.c |   20 +++++++++++++++++++-
 3 files changed, 30 insertions(+), 18 deletions(-)

diff --git a/target-ppc/cpu-qom.h b/target-ppc/cpu-qom.h
index 2bf0ab6..8a08958 100644
--- a/target-ppc/cpu-qom.h
+++ b/target-ppc/cpu-qom.h
@@ -68,6 +68,10 @@ typedef struct PowerPCCPUClass {
 #endif
     void (*init_proc)(CPUPPCState *env);
     int  (*check_pow)(CPUPPCState *env);
+#if defined(CONFIG_SOFTMMU)
+    int (*handle_mmu_fault)(CPUPPCState *env, target_ulong eaddr, int rwx,
+                            int mmu_idx);
+#endif
 } PowerPCCPUClass;
 
 /**
diff --git a/target-ppc/mmu_helper.c b/target-ppc/mmu_helper.c
index 4c41673..acf0133 100644
--- a/target-ppc/mmu_helper.c
+++ b/target-ppc/mmu_helper.c
@@ -1391,22 +1391,6 @@ static int cpu_ppc_handle_mmu_fault(CPUPPCState *env, 
target_ulong address,
     int access_type;
     int ret = 0;
 
-    switch (env->mmu_model) {
-#if defined(TARGET_PPC64)
-    case POWERPC_MMU_64B:
-    case POWERPC_MMU_2_06:
-    case POWERPC_MMU_2_06d:
-        return ppc_hash64_handle_mmu_fault(env, address, rw, mmu_idx);
-#endif
-
-    case POWERPC_MMU_32B:
-    case POWERPC_MMU_601:
-        return ppc_hash32_handle_mmu_fault(env, address, rw, mmu_idx);
-
-    default:
-        ; /* Otherwise fall through to the general code below */
-    }
-
     if (rw == 2) {
         /* code access */
         rw = 0;
@@ -2802,9 +2786,15 @@ void helper_booke206_tlbflush(CPUPPCState *env, uint32_t 
type)
 void tlb_fill(CPUPPCState *env, target_ulong addr, int is_write, int mmu_idx,
               uintptr_t retaddr)
 {
+    CPUState *cpu = ENV_GET_CPU(env);
+    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
     int ret;
 
-    ret = cpu_ppc_handle_mmu_fault(env, addr, is_write, mmu_idx);
+    if (pcc->handle_mmu_fault) {
+        ret = pcc->handle_mmu_fault(env, addr, is_write, mmu_idx);
+    } else {
+        ret = cpu_ppc_handle_mmu_fault(env, addr, is_write, mmu_idx);
+    }
     if (unlikely(ret != 0)) {
         if (likely(retaddr)) {
             /* now we have a real cpu fault */
diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index b2a76d0..6803ae3 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -25,6 +25,8 @@
 #include "sysemu/arch_init.h"
 #include "sysemu/cpus.h"
 #include "cpu-models.h"
+#include "mmu-hash32.h"
+#include "mmu-hash64.h"
 
 //#define PPC_DUMP_CPU
 //#define PPC_DEBUG_SPR
@@ -4796,6 +4798,7 @@ POWERPC_FAMILY(601)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x000000000000FD70ULL;
     pcc->mmu_model = POWERPC_MMU_601;
+    pcc->handle_mmu_fault = ppc_hash32_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_601;
     pcc->bus_model = PPC_FLAGS_INPUT_6xx;
     pcc->bfd_mach = bfd_mach_ppc_601;
@@ -4830,7 +4833,7 @@ POWERPC_FAMILY(601v)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x000000000000FD70ULL;
     pcc->mmu_model = POWERPC_MMU_601;
-    pcc->excp_model = POWERPC_EXCP_601;
+    pcc->handle_mmu_fault = ppc_hash32_handle_mmu_fault;
     pcc->bus_model = PPC_FLAGS_INPUT_6xx;
     pcc->bfd_mach = bfd_mach_ppc_601;
     pcc->flags = POWERPC_FLAG_SE | POWERPC_FLAG_RTC_CLK;
@@ -5037,6 +5040,7 @@ POWERPC_FAMILY(604)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x000000000005FF77ULL;
     pcc->mmu_model = POWERPC_MMU_32B;
+    pcc->handle_mmu_fault = ppc_hash32_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_604;
     pcc->bus_model = PPC_FLAGS_INPUT_6xx;
     pcc->bfd_mach = bfd_mach_ppc_604;
@@ -5103,6 +5107,7 @@ POWERPC_FAMILY(604E)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x000000000005FF77ULL;
     pcc->mmu_model = POWERPC_MMU_32B;
+    pcc->handle_mmu_fault = ppc_hash32_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_604;
     pcc->bus_model = PPC_FLAGS_INPUT_6xx;
     pcc->bfd_mach = bfd_mach_ppc_604;
@@ -5156,6 +5161,7 @@ POWERPC_FAMILY(740)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x000000000005FF77ULL;
     pcc->mmu_model = POWERPC_MMU_32B;
+    pcc->handle_mmu_fault = ppc_hash32_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_7x0;
     pcc->bus_model = PPC_FLAGS_INPUT_6xx;
     pcc->bfd_mach = bfd_mach_ppc_750;
@@ -5217,6 +5223,7 @@ POWERPC_FAMILY(750)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x000000000005FF77ULL;
     pcc->mmu_model = POWERPC_MMU_32B;
+    pcc->handle_mmu_fault = ppc_hash32_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_7x0;
     pcc->bus_model = PPC_FLAGS_INPUT_6xx;
     pcc->bfd_mach = bfd_mach_ppc_750;
@@ -5401,6 +5408,7 @@ POWERPC_FAMILY(750cl)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x000000000005FF77ULL;
     pcc->mmu_model = POWERPC_MMU_32B;
+    pcc->handle_mmu_fault = ppc_hash32_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_7x0;
     pcc->bus_model = PPC_FLAGS_INPUT_6xx;
     pcc->bfd_mach = bfd_mach_ppc_750;
@@ -5466,6 +5474,7 @@ POWERPC_FAMILY(750cx)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x000000000005FF77ULL;
     pcc->mmu_model = POWERPC_MMU_32B;
+    pcc->handle_mmu_fault = ppc_hash32_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_7x0;
     pcc->bus_model = PPC_FLAGS_INPUT_6xx;
     pcc->bfd_mach = bfd_mach_ppc_750;
@@ -5536,6 +5545,7 @@ POWERPC_FAMILY(750fx)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x000000000005FF77ULL;
     pcc->mmu_model = POWERPC_MMU_32B;
+    pcc->handle_mmu_fault = ppc_hash32_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_7x0;
     pcc->bus_model = PPC_FLAGS_INPUT_6xx;
     pcc->bfd_mach = bfd_mach_ppc_750;
@@ -5606,6 +5616,7 @@ POWERPC_FAMILY(750gx)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x000000000005FF77ULL;
     pcc->mmu_model = POWERPC_MMU_32B;
+    pcc->handle_mmu_fault = ppc_hash32_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_7x0;
     pcc->bus_model = PPC_FLAGS_INPUT_6xx;
     pcc->bfd_mach = bfd_mach_ppc_750;
@@ -5798,6 +5809,7 @@ POWERPC_FAMILY(7400)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x000000000205FF77ULL;
     pcc->mmu_model = POWERPC_MMU_32B;
+    pcc->handle_mmu_fault = ppc_hash32_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_74xx;
     pcc->bus_model = PPC_FLAGS_INPUT_6xx;
     pcc->bfd_mach = bfd_mach_ppc_7400;
@@ -5864,6 +5876,7 @@ POWERPC_FAMILY(7410)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x000000000205FF77ULL;
     pcc->mmu_model = POWERPC_MMU_32B;
+    pcc->handle_mmu_fault = ppc_hash32_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_74xx;
     pcc->bus_model = PPC_FLAGS_INPUT_6xx;
     pcc->bfd_mach = bfd_mach_ppc_7400;
@@ -6570,6 +6583,7 @@ POWERPC_FAMILY(970)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x900000000204FF36ULL;
     pcc->mmu_model = POWERPC_MMU_64B;
+    pcc->handle_mmu_fault = ppc_hash64_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_970;
     pcc->bus_model = PPC_FLAGS_INPUT_970;
     pcc->bfd_mach = bfd_mach_ppc64;
@@ -6680,6 +6694,7 @@ POWERPC_FAMILY(970FX)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x800000000204FF36ULL;
     pcc->mmu_model = POWERPC_MMU_64B;
+    pcc->handle_mmu_fault = ppc_hash64_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_970;
     pcc->bus_model = PPC_FLAGS_INPUT_970;
     pcc->bfd_mach = bfd_mach_ppc64;
@@ -6778,6 +6793,7 @@ POWERPC_FAMILY(970GX)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x800000000204FF36ULL;
     pcc->mmu_model = POWERPC_MMU_64B;
+    pcc->handle_mmu_fault = ppc_hash64_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_970;
     pcc->bus_model = PPC_FLAGS_INPUT_970;
     pcc->bfd_mach = bfd_mach_ppc64;
@@ -6876,6 +6892,7 @@ POWERPC_FAMILY(970MP)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC_NONE;
     pcc->msr_mask = 0x900000000204FF36ULL;
     pcc->mmu_model = POWERPC_MMU_64B;
+    pcc->handle_mmu_fault = ppc_hash64_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_970;
     pcc->bus_model = PPC_FLAGS_INPUT_970;
     pcc->bfd_mach = bfd_mach_ppc64;
@@ -6968,6 +6985,7 @@ POWERPC_FAMILY(POWER7)(ObjectClass *oc, void *data)
     pcc->insns_flags2 = PPC2_VSX | PPC2_DFP | PPC2_DBRX;
     pcc->msr_mask = 0x800000000204FF36ULL;
     pcc->mmu_model = POWERPC_MMU_2_06;
+    pcc->handle_mmu_fault = ppc_hash64_handle_mmu_fault;
     pcc->excp_model = POWERPC_EXCP_POWER7;
     pcc->bus_model = PPC_FLAGS_INPUT_POWER7;
     pcc->bfd_mach = bfd_mach_ppc64;
-- 
1.7.10.4