i386: move TCG cpu class initialization to tcg/

to do this, we need to take code out of cpu.c and helper.c,
and also move some prototypes from cpu.h, for code that is
needed in tcg/xxx_helper.c, and which in turn is part of the
callbacks registered by the class initialization.

Therefore, do some shuffling of the parts of cpu.h that
are only relevant for tcg/, and put them in tcg/helper-tcg.h

For FT0 and similar macros, put them in tcg/fpu-helper.c
since they are used only there.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201212155530.23098-8-cfontana@suse.de>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

16 files changed, 227 insertions, 17 deletions

diff --git a/target/i386/tcg/bpt_helper.c b/target/i386/tcg/bpt_helper.c
index e6cc2921e2..979230ac12 100644
--- a/target/i386/tcg/bpt_helper.c
+++ b/target/i386/tcg/bpt_helper.c
@@ -21,6 +21,7 @@
 #include "cpu.h"
 #include "exec/exec-all.h"
 #include "exec/helper-proto.h"
+#include "helper-tcg.h"
 
 
 #ifndef CONFIG_USER_ONLY
diff --git a/target/i386/tcg/cc_helper.c b/target/i386/tcg/cc_helper.c
index 924dd3cd57..cc7ea9e8b9 100644
--- a/target/i386/tcg/cc_helper.c
+++ b/target/i386/tcg/cc_helper.c
@@ -20,6 +20,7 @@
 #include "qemu/osdep.h"
 #include "cpu.h"
 #include "exec/helper-proto.h"
+#include "helper-tcg.h"
 
 const uint8_t parity_table[256] = {
     CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
diff --git a/target/i386/tcg/excp_helper.c b/target/i386/tcg/excp_helper.c
index 191471749f..a0f44431fe 100644
--- a/target/i386/tcg/excp_helper.c
+++ b/target/i386/tcg/excp_helper.c
@@ -23,6 +23,7 @@
 #include "qemu/log.h"
 #include "sysemu/runstate.h"
 #include "exec/helper-proto.h"
+#include "helper-tcg.h"
 
 void helper_raise_interrupt(CPUX86State *env, int intno, int next_eip_addend)
 {
diff --git a/target/i386/tcg/fpu_helper.c b/target/i386/tcg/fpu_helper.c
index 03b35443a6..60ed93520a 100644
--- a/target/i386/tcg/fpu_helper.c
+++ b/target/i386/tcg/fpu_helper.c
@@ -26,11 +26,18 @@
 #include "exec/cpu_ldst.h"
 #include "fpu/softfloat.h"
 #include "fpu/softfloat-macros.h"
+#include "helper-tcg.h"
 
 #ifdef CONFIG_SOFTMMU
 #include "hw/irq.h"
 #endif
 
+/* float macros */
+#define FT0    (env->ft0)
+#define ST0    (env->fpregs[env->fpstt].d)
+#define ST(n)  (env->fpregs[(env->fpstt + (n)) & 7].d)
+#define ST1    ST(1)
+
 #define FPU_RC_MASK         0xc00
 #define FPU_RC_NEAR         0x000
 #define FPU_RC_DOWN         0x400
@@ -2986,23 +2993,21 @@ void update_mxcsr_status(CPUX86State *env)
 
 void update_mxcsr_from_sse_status(CPUX86State *env)
 {
-    if (tcg_enabled()) {
-        uint8_t flags = get_float_exception_flags(&env->sse_status);
-        /*
-         * The MXCSR denormal flag has opposite semantics to
-         * float_flag_input_denormal (the softfloat code sets that flag
-         * only when flushing input denormals to zero, but SSE sets it
-         * only when not flushing them to zero), so is not converted
-         * here.
-         */
-        env->mxcsr |= ((flags & float_flag_invalid ? FPUS_IE : 0) |
-                       (flags & float_flag_divbyzero ? FPUS_ZE : 0) |
-                       (flags & float_flag_overflow ? FPUS_OE : 0) |
-                       (flags & float_flag_underflow ? FPUS_UE : 0) |
-                       (flags & float_flag_inexact ? FPUS_PE : 0) |
-                       (flags & float_flag_output_denormal ? FPUS_UE | FPUS_PE :
-                        0));
-    }
+    uint8_t flags = get_float_exception_flags(&env->sse_status);
+    /*
+     * The MXCSR denormal flag has opposite semantics to
+     * float_flag_input_denormal (the softfloat code sets that flag
+     * only when flushing input denormals to zero, but SSE sets it
+     * only when not flushing them to zero), so is not converted
+     * here.
+     */
+    env->mxcsr |= ((flags & float_flag_invalid ? FPUS_IE : 0) |
+                   (flags & float_flag_divbyzero ? FPUS_ZE : 0) |
+                   (flags & float_flag_overflow ? FPUS_OE : 0) |
+                   (flags & float_flag_underflow ? FPUS_UE : 0) |
+                   (flags & float_flag_inexact ? FPUS_PE : 0) |
+                   (flags & float_flag_output_denormal ? FPUS_UE | FPUS_PE :
+                    0));
 }
 
 void helper_update_mxcsr(CPUX86State *env)
diff --git a/target/i386/tcg/helper-tcg.h b/target/i386/tcg/helper-tcg.h
new file mode 100644
index 0000000000..148edf49a3
--- /dev/null
+++ b/target/i386/tcg/helper-tcg.h
@@ -0,0 +1,106 @@
+/*
+ * TCG specific prototypes for helpers
+ *
+ *  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 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 I386_HELPER_TCG_H
+#define I386_HELPER_TCG_H
+
+#include "exec/exec-all.h"
+
+/* Maximum instruction code size */
+#define TARGET_MAX_INSN_SIZE 16
+
+/*
+ * XXX: This value should match the one returned by CPUID
+ * and in exec.c
+ */
+# if defined(TARGET_X86_64)
+# define TCG_PHYS_ADDR_BITS 40
+# else
+# define TCG_PHYS_ADDR_BITS 36
+# endif
+
+#define PHYS_ADDR_MASK MAKE_64BIT_MASK(0, TCG_PHYS_ADDR_BITS)
+
+/**
+ * x86_cpu_do_interrupt:
+ * @cpu: vCPU the interrupt is to be handled by.
+ */
+void x86_cpu_do_interrupt(CPUState *cpu);
+bool x86_cpu_exec_interrupt(CPUState *cpu, int int_req);
+
+/* helper.c */
+bool x86_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
+                      MMUAccessType access_type, int mmu_idx,
+                      bool probe, uintptr_t retaddr);
+
+void breakpoint_handler(CPUState *cs);
+
+/* n must be a constant to be efficient */
+static inline target_long lshift(target_long x, int n)
+{
+    if (n >= 0) {
+        return x << n;
+    } else {
+        return x >> (-n);
+    }
+}
+
+/* translate.c */
+void tcg_x86_init(void);
+
+/* excp_helper.c */
+void QEMU_NORETURN raise_exception(CPUX86State *env, int exception_index);
+void QEMU_NORETURN raise_exception_ra(CPUX86State *env, int exception_index,
+                                      uintptr_t retaddr);
+void QEMU_NORETURN raise_exception_err(CPUX86State *env, int exception_index,
+                                       int error_code);
+void QEMU_NORETURN raise_exception_err_ra(CPUX86State *env, int exception_index,
+                                          int error_code, uintptr_t retaddr);
+void QEMU_NORETURN raise_interrupt(CPUX86State *nenv, int intno, int is_int,
+                                   int error_code, int next_eip_addend);
+
+/* cc_helper.c */
+extern const uint8_t parity_table[256];
+
+/*
+ * NOTE: the translator must set DisasContext.cc_op to CC_OP_EFLAGS
+ * after generating a call to a helper that uses this.
+ */
+static inline void cpu_load_eflags(CPUX86State *env, int eflags,
+                                   int update_mask)
+{
+    CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
+    CC_OP = CC_OP_EFLAGS;
+    env->df = 1 - (2 * ((eflags >> 10) & 1));
+    env->eflags = (env->eflags & ~update_mask) |
+        (eflags & update_mask) | 0x2;
+}
+
+/* svm_helper.c */
+void QEMU_NORETURN cpu_vmexit(CPUX86State *nenv, uint32_t exit_code,
+                              uint64_t exit_info_1, uintptr_t retaddr);
+void do_vmexit(CPUX86State *env, uint32_t exit_code, uint64_t exit_info_1);
+
+/* seg_helper.c */
+void do_interrupt_x86_hardirq(CPUX86State *env, int intno, int is_hw);
+
+/* smm_helper.c */
+void do_smm_enter(X86CPU *cpu);
+
+#endif /* I386_HELPER_TCG_H */
diff --git a/target/i386/tcg/int_helper.c b/target/i386/tcg/int_helper.c
index 4f89436b53..87fa7280ee 100644
--- a/target/i386/tcg/int_helper.c
+++ b/target/i386/tcg/int_helper.c
@@ -24,6 +24,7 @@
 #include "exec/helper-proto.h"
 #include "qapi/error.h"
 #include "qemu/guest-random.h"
+#include "helper-tcg.h"
 
 //#define DEBUG_MULDIV
 
diff --git a/target/i386/tcg/mem_helper.c b/target/i386/tcg/mem_helper.c
index 21ca3e3e88..e5cd2de1bf 100644
--- a/target/i386/tcg/mem_helper.c
+++ b/target/i386/tcg/mem_helper.c
@@ -25,6 +25,7 @@
 #include "qemu/int128.h"
 #include "qemu/atomic128.h"
 #include "tcg/tcg.h"
+#include "helper-tcg.h"
 
 void helper_cmpxchg8b_unlocked(CPUX86State *env, target_ulong a0)
 {
diff --git a/target/i386/tcg/meson.build b/target/i386/tcg/meson.build
index 02794226c2..6a1a73cdbf 100644
--- a/target/i386/tcg/meson.build
+++ b/target/i386/tcg/meson.build
@@ -10,4 +10,5 @@ i386_ss.add(when: 'CONFIG_TCG', if_true: files(
   'seg_helper.c',
   'smm_helper.c',
   'svm_helper.c',
+  'tcg-cpu.c',
   'translate.c'), if_false: files('tcg-stub.c'))
diff --git a/target/i386/tcg/misc_helper.c b/target/i386/tcg/misc_helper.c
index ae259d9145..c99370e5e3 100644
--- a/target/i386/tcg/misc_helper.c
+++ b/target/i386/tcg/misc_helper.c
@@ -24,6 +24,7 @@
 #include "exec/exec-all.h"
 #include "exec/cpu_ldst.h"
 #include "exec/address-spaces.h"
+#include "helper-tcg.h"
 
 void helper_outb(CPUX86State *env, uint32_t port, uint32_t data)
 {
diff --git a/target/i386/tcg/mpx_helper.c b/target/i386/tcg/mpx_helper.c
index fd966174b4..22423eedcd 100644
--- a/target/i386/tcg/mpx_helper.c
+++ b/target/i386/tcg/mpx_helper.c
@@ -22,6 +22,7 @@
 #include "exec/helper-proto.h"
 #include "exec/cpu_ldst.h"
 #include "exec/exec-all.h"
+#include "helper-tcg.h"
 
 
 void helper_bndck(CPUX86State *env, uint32_t fail)
diff --git a/target/i386/tcg/seg_helper.c b/target/i386/tcg/seg_helper.c
index e6ffa1f018..1255efe7e0 100644
--- a/target/i386/tcg/seg_helper.c
+++ b/target/i386/tcg/seg_helper.c
@@ -25,6 +25,7 @@
 #include "exec/exec-all.h"
 #include "exec/cpu_ldst.h"
 #include "exec/log.h"
+#include "helper-tcg.h"
 
 //#define DEBUG_PCALL
 
diff --git a/target/i386/tcg/smm_helper.c b/target/i386/tcg/smm_helper.c
index d20e8edfdf..62d027abd3 100644
--- a/target/i386/tcg/smm_helper.c
+++ b/target/i386/tcg/smm_helper.c
@@ -22,6 +22,8 @@
 #include "cpu.h"
 #include "exec/helper-proto.h"
 #include "exec/log.h"
+#include "helper-tcg.h"
+
 
 /* SMM support */
 
diff --git a/target/i386/tcg/svm_helper.c b/target/i386/tcg/svm_helper.c
index 38931586e5..097bb9b83d 100644
--- a/target/i386/tcg/svm_helper.c
+++ b/target/i386/tcg/svm_helper.c
@@ -22,6 +22,7 @@
 #include "exec/helper-proto.h"
 #include "exec/exec-all.h"
 #include "exec/cpu_ldst.h"
+#include "helper-tcg.h"
 
 /* Secure Virtual Machine helpers */
 
diff --git a/target/i386/tcg/tcg-cpu.c b/target/i386/tcg/tcg-cpu.c
new file mode 100644
index 0000000000..628dd29fe7
--- /dev/null
+++ b/target/i386/tcg/tcg-cpu.c
@@ -0,0 +1,71 @@
+/*
+ * i386 TCG cpu class initialization
+ *
+ *  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 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/>.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "tcg-cpu.h"
+#include "exec/exec-all.h"
+#include "sysemu/runstate.h"
+#include "helper-tcg.h"
+
+#if !defined(CONFIG_USER_ONLY)
+#include "hw/i386/apic.h"
+#endif
+
+/* Frob eflags into and out of the CPU temporary format.  */
+
+static void x86_cpu_exec_enter(CPUState *cs)
+{
+    X86CPU *cpu = X86_CPU(cs);
+    CPUX86State *env = &cpu->env;
+
+    CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
+    env->df = 1 - (2 * ((env->eflags >> 10) & 1));
+    CC_OP = CC_OP_EFLAGS;
+    env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
+}
+
+static void x86_cpu_exec_exit(CPUState *cs)
+{
+    X86CPU *cpu = X86_CPU(cs);
+    CPUX86State *env = &cpu->env;
+
+    env->eflags = cpu_compute_eflags(env);
+}
+
+static void x86_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb)
+{
+    X86CPU *cpu = X86_CPU(cs);
+
+    cpu->env.eip = tb->pc - tb->cs_base;
+}
+
+void tcg_cpu_common_class_init(CPUClass *cc)
+{
+    cc->do_interrupt = x86_cpu_do_interrupt;
+    cc->cpu_exec_interrupt = x86_cpu_exec_interrupt;
+    cc->synchronize_from_tb = x86_cpu_synchronize_from_tb;
+    cc->cpu_exec_enter = x86_cpu_exec_enter;
+    cc->cpu_exec_exit = x86_cpu_exec_exit;
+    cc->tcg_initialize = tcg_x86_init;
+    cc->tlb_fill = x86_cpu_tlb_fill;
+#ifndef CONFIG_USER_ONLY
+    cc->debug_excp_handler = breakpoint_handler;
+#endif
+}
diff --git a/target/i386/tcg/tcg-cpu.h b/target/i386/tcg/tcg-cpu.h
new file mode 100644
index 0000000000..81f02e562e
--- /dev/null
+++ b/target/i386/tcg/tcg-cpu.h
@@ -0,0 +1,15 @@
+/*
+ * i386 TCG CPU class initialization
+ *
+ * Copyright 2020 SUSE LLC
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef TCG_CPU_H
+#define TCG_CPU_H
+
+void tcg_cpu_common_class_init(CPUClass *cc);
+
+#endif /* TCG_CPU_H */
diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index e8f5f5803a..750f75c257 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -28,6 +28,7 @@
 
 #include "exec/helper-proto.h"
 #include "exec/helper-gen.h"
+#include "helper-tcg.h"
 
 #include "trace-tcg.h"
 #include "exec/log.h"