tcg: Add tlb_fast_offset to TCGContext

Disconnect the layout of ArchCPU from TCG compilation.
Pass the relative offset of 'env' and 'neg.tlb.f' as a parameter.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

3 files changed, 58 insertions, 38 deletions

diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h
index b757d37966..0d418a0384 100644
--- a/include/exec/cpu-defs.h
+++ b/include/exec/cpu-defs.h
@@ -61,12 +61,11 @@
 #define NB_MMU_MODES 16
 
 #if !defined(CONFIG_USER_ONLY) && defined(CONFIG_TCG)
+#include "exec/tlb-common.h"
 
 /* use a fully associative victim tlb of 8 entries */
 #define CPU_VTLB_SIZE 8
 
-#define CPU_TLB_ENTRY_BITS 5
-
 #define CPU_TLB_DYN_MIN_BITS 6
 #define CPU_TLB_DYN_DEFAULT_BITS 8
 
@@ -90,27 +89,6 @@
 #  endif
 # endif
 
-/* Minimalized TLB entry for use by TCG fast path. */
-typedef union CPUTLBEntry {
-    struct {
-        uint64_t addr_read;
-        uint64_t addr_write;
-        uint64_t 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, as well as index
-     * access to addr_{read,write,code}.
-     */
-    uint64_t addr_idx[(1 << CPU_TLB_ENTRY_BITS) / sizeof(uint64_t)];
-} CPUTLBEntry;
-
-QEMU_BUILD_BUG_ON(sizeof(CPUTLBEntry) != (1 << CPU_TLB_ENTRY_BITS));
-
 #endif  /* !CONFIG_USER_ONLY && CONFIG_TCG */
 
 #if !defined(CONFIG_USER_ONLY)
@@ -185,17 +163,6 @@ typedef struct CPUTLBDesc {
 } CPUTLBDesc;
 
 /*
- * Data elements that are per MMU mode, accessed by the fast path.
- * The structure is aligned to aid loading the pair with one insn.
- */
-typedef struct CPUTLBDescFast {
-    /* Contains (n_entries - 1) << CPU_TLB_ENTRY_BITS */
-    uintptr_t mask;
-    /* The array of tlb entries itself. */
-    CPUTLBEntry *table;
-} CPUTLBDescFast QEMU_ALIGNED(2 * sizeof(void *));
-
-/*
  * Data elements that are shared between all MMU modes.
  */
 typedef struct CPUTLBCommon {
@@ -230,10 +197,6 @@ typedef struct CPUTLB {
     CPUTLBDescFast f[NB_MMU_MODES];
 } CPUTLB;
 
-/* This will be used by TCG backends to compute offsets.  */
-#define TLB_MASK_TABLE_OFS(IDX) \
-    ((int)offsetof(ArchCPU, neg.tlb.f[IDX]) - (int)offsetof(ArchCPU, env))
-
 #else
 
 typedef struct CPUTLB { } CPUTLB;
diff --git a/include/exec/tlb-common.h b/include/exec/tlb-common.h
new file mode 100644
index 0000000000..dc5a5faa0b
--- /dev/null
+++ b/include/exec/tlb-common.h
@@ -0,0 +1,56 @@
+/*
+ * Common definitions for the softmmu tlb
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef EXEC_TLB_COMMON_H
+#define EXEC_TLB_COMMON_H 1
+
+#define CPU_TLB_ENTRY_BITS 5
+
+/* Minimalized TLB entry for use by TCG fast path. */
+typedef union CPUTLBEntry {
+    struct {
+        uint64_t addr_read;
+        uint64_t addr_write;
+        uint64_t 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, as well as index
+     * access to addr_{read,write,code}.
+     */
+    uint64_t addr_idx[(1 << CPU_TLB_ENTRY_BITS) / sizeof(uint64_t)];
+} CPUTLBEntry;
+
+QEMU_BUILD_BUG_ON(sizeof(CPUTLBEntry) != (1 << CPU_TLB_ENTRY_BITS));
+
+/*
+ * Data elements that are per MMU mode, accessed by the fast path.
+ * The structure is aligned to aid loading the pair with one insn.
+ */
+typedef struct CPUTLBDescFast {
+    /* Contains (n_entries - 1) << CPU_TLB_ENTRY_BITS */
+    uintptr_t mask;
+    /* The array of tlb entries itself. */
+    CPUTLBEntry *table;
+} CPUTLBDescFast QEMU_ALIGNED(2 * sizeof(void *));
+
+#endif /* EXEC_TLB_COMMON_H */
diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h
index 0da17f1b4f..54f260a66b 100644
--- a/include/tcg/tcg.h
+++ b/include/tcg/tcg.h
@@ -547,6 +547,7 @@ struct TCGContext {
     TCGType addr_type;            /* TCG_TYPE_I32 or TCG_TYPE_I64 */
 
 #ifdef CONFIG_SOFTMMU
+    int tlb_fast_offset;
     int page_mask;
     uint8_t page_bits;
     uint8_t tlb_dyn_max_bits;