hw/mips: Move address translation helpers to target/mips/

Address translation is an architectural thing (not hardware
related). Move the helpers from hw/ to target/.

As physical address and KVM are specific to system mode
emulation, restrict this file to softmmu, so it doesn't
get compiled for user-mode emulation.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201206233949.3783184-2-f4bug@amsat.org>

target/mips/addr.c

@@ -0,0 +1,51 @@
+/*
+ * QEMU MIPS address translation support
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+
+static int mips_um_ksegs;
+
+uint64_t cpu_mips_kseg0_to_phys(void *opaque, uint64_t addr)
+{
+    return addr & 0x1fffffffll;
+}
+
+uint64_t cpu_mips_phys_to_kseg0(void *opaque, uint64_t addr)
+{
+    return addr | ~0x7fffffffll;
+}
+
+uint64_t cpu_mips_kvm_um_phys_to_kseg0(void *opaque, uint64_t addr)
+{
+    return addr | 0x40000000ll;
+}
+
+bool mips_um_ksegs_enabled(void)
+{
+    return mips_um_ksegs;
+}
+
+void mips_um_ksegs_enable(void)
+{
+    mips_um_ksegs = 1;
+}

target/mips/cpu.h

@@ -1291,6 +1291,14 @@ bool cpu_supports_isa(const CPUMIPSState *env, uint64_t isa_mask);
 bool cpu_type_supports_isa(const char *cpu_type, uint64_t isa);
 void cpu_set_exception_base(int vp_index, target_ulong address);
 
+/* addr.c */
+uint64_t cpu_mips_kseg0_to_phys(void *opaque, uint64_t addr);
+uint64_t cpu_mips_phys_to_kseg0(void *opaque, uint64_t addr);
+
+uint64_t cpu_mips_kvm_um_phys_to_kseg0(void *opaque, uint64_t addr);
+bool mips_um_ksegs_enabled(void);
+void mips_um_ksegs_enable(void);
+
 /* mips_int.c */
 void cpu_mips_soft_irq(CPUMIPSState *env, int irq, int level);
 

target/mips/meson.build

@@ -14,6 +14,7 @@ mips_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c'))
 
 mips_softmmu_ss = ss.source_set()
 mips_softmmu_ss.add(files(
+  'addr.c',
   'cp0_helper.c',
   'cp0_timer.c',
   'machine.c',

target/mips/translate.c

@@ -28,8 +28,6 @@
 #include "exec/exec-all.h"
 #include "tcg/tcg-op.h"
 #include "exec/cpu_ldst.h"
-#include "hw/mips/cpudevs.h"
-
 #include "exec/helper-proto.h"
 #include "exec/helper-gen.h"
 #include "hw/semihosting/semihost.h"