semihosting: Split out common-semi-target.h

Move the ARM and RISCV specific helpers into
their own header file.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Luc Michel <lmichel@kalray.eu>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 62 insertions, 0 deletions

diff --git a/target/arm/common-semi-target.h b/target/arm/common-semi-target.h
new file mode 100644
index 0000000..629d75c
--- /dev/null
+++ b/target/arm/common-semi-target.h
@@ -0,0 +1,62 @@
+/*
+ * Target-specific parts of semihosting/arm-compat-semi.c.
+ *
+ * Copyright (c) 2005, 2007 CodeSourcery.
+ * Copyright (c) 2019, 2022 Linaro
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef TARGET_ARM_COMMON_SEMI_TARGET_H
+#define TARGET_ARM_COMMON_SEMI_TARGET_H
+
+#ifndef CONFIG_USER_ONLY
+#include "hw/arm/boot.h"
+#endif
+
+static inline target_ulong common_semi_arg(CPUState *cs, int argno)
+{
+    ARMCPU *cpu = ARM_CPU(cs);
+    CPUARMState *env = &cpu->env;
+    if (is_a64(env)) {
+        return env->xregs[argno];
+    } else {
+        return env->regs[argno];
+    }
+}
+
+static inline void common_semi_set_ret(CPUState *cs, target_ulong ret)
+{
+    ARMCPU *cpu = ARM_CPU(cs);
+    CPUARMState *env = &cpu->env;
+    if (is_a64(env)) {
+        env->xregs[0] = ret;
+    } else {
+        env->regs[0] = ret;
+    }
+}
+
+static inline bool common_semi_sys_exit_extended(CPUState *cs, int nr)
+{
+    return (nr == TARGET_SYS_EXIT_EXTENDED || is_a64(cs->env_ptr));
+}
+
+static inline bool is_64bit_semihosting(CPUArchState *env)
+{
+    return is_a64(env);
+}
+
+static inline target_ulong common_semi_stack_bottom(CPUState *cs)
+{
+    ARMCPU *cpu = ARM_CPU(cs);
+    CPUARMState *env = &cpu->env;
+    return is_a64(env) ? env->xregs[31] : env->regs[13];
+}
+
+static inline bool common_semi_has_synccache(CPUArchState *env)
+{
+    /* Ok for A64, invalid for A32/T32 */
+    return is_a64(env);
+}
+
+#endif