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>

1 files changed, 51 insertions, 0 deletions

diff --git a/target/mips/addr.c b/target/mips/addr.c
new file mode 100644
index 0000000000..27a6036c45
--- /dev/null
+++ b/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;
+}