From: Stacey Son <sson@FreeBSD.org>
Defined address spaces for FreeBSD/arm64 and added function for
getting stack pointer from CPU and setting a return value.
Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Signed-off-by: Ajeet Singh <itachis@FreeBSD.org>
Co-authored-by: Sean Bruno <sbruno@freebsd.org>
Co-authored-by: Warner Losh <imp@bsdimp.com>
---
bsd-user/aarch64/target_arch_vmparam.h | 68 ++++++++++++++++++++++++++
1 file changed, 68 insertions(+)
create mode 100644 bsd-user/aarch64/target_arch_vmparam.h
diff --git a/bsd-user/aarch64/target_arch_vmparam.h b/bsd-user/aarch64/target_arch_vmparam.h
new file mode 100644
index 0000000000..dc66e1289b
--- /dev/null
+++ b/bsd-user/aarch64/target_arch_vmparam.h
@@ -0,0 +1,68 @@
+/*
+ * ARM AArch64 VM parameters definitions for bsd-user.
+ *
+ * Copyright (c) 2015 Stacey D. Son <sson at FreeBSD>
+ *
+ * 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 TARGET_ARCH_VMPARAM_H
+#define TARGET_ARCH_VMPARAM_H
+
+#include "cpu.h"
+
+/**
+ * FreeBSD/arm64 Address space layout.
+ *
+ * ARMv8 implements up to a 48 bit virtual address space. The address space is
+ * split into 2 regions at each end of the 64 bit address space, with an
+ * out of range "hole" in the middle.
+ *
+ * We limit the size of the two spaces to 39 bits each.
+ *
+ * Upper region: 0xffffffffffffffff
+ * 0xffffff8000000000
+ *
+ * Hole: 0xffffff7fffffffff
+ * 0x0000008000000000
+ *
+ * Lower region: 0x0000007fffffffff
+ * 0x0000000000000000
+ *
+ * The upper region for the kernel, and the lower region for userland.
+ */
+
+
+/* compare to sys/arm64/include/vmparam.h */
+#define TARGET_MAXTSIZ (1 * GiB) /* max text size */
+#define TARGET_DFLDSIZ (128 * MiB) /* initial data size limit */
+#define TARGET_MAXDSIZ (1 * GiB) /* max data size */
+#define TARGET_DFLSSIZ (128 * MiB) /* initial stack size limit */
+#define TARGET_MAXSSIZ (1 * GiB) /* max stack size */
+#define TARGET_SGROWSIZ (128 * KiB) /* amount to grow stack */
+
+ /* KERNBASE - 512 MB */
+#define TARGET_VM_MAXUSER_ADDRESS (0x00007fffff000000ULL - (512 * MiB))
+#define TARGET_USRSTACK TARGET_VM_MAXUSER_ADDRESS
+
+static inline abi_ulong get_sp_from_cpustate(CPUARMState *state)
+{
+ return state->xregs[31]; /* sp */
+}
+
+static inline void set_second_rval(CPUARMState *state, abi_ulong retval2)
+{
+ state->xregs[1] = retval2; /* XXX not really used on 64-bit arch */
+}
+#endif /* TARGET_ARCH_VMPARAM_H */
--
2.34.1