On 6/17/24 11:57, Ajeet Singh wrote:
From: Stacey Son <s...@freebsd.org>
Function for setting up thread upcall which will
add thread support to BSD-User
Signed-off-by: Stacey Son <s...@freebsd.org>
Signed-off-by: Ajeet Singh <itac...@freebsd.org>
Co-authored-by: Jessica Clarke <jrt...@jrtc27.com>
---
bsd-user/aarch64/target_arch_thread.h | 45 +++++++++++++++++++++++++++
1 file changed, 45 insertions(+)
create mode 100644 bsd-user/aarch64/target_arch_thread.h
diff --git a/bsd-user/aarch64/target_arch_thread.h
b/bsd-user/aarch64/target_arch_thread.h
new file mode 100644
index 0000000000..d2f2dea7ce
--- /dev/null
+++ b/bsd-user/aarch64/target_arch_thread.h
@@ -0,0 +1,45 @@
+/*
+ * ARM AArch64 thread support 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_THREAD_H
+#define TARGET_ARCH_THREAD_H
+
+/* Compare to arm64/arm64/vm_machdep.c cpu_set_upcall_kse() */
+static inline void target_thread_set_upcall(CPUARMState *regs, abi_ulong entry,
+ abi_ulong arg, abi_ulong stack_base, abi_ulong stack_size)
+{
+ abi_ulong sp;
+
+ /*
+ * Make sure the stack is properly aligned.
+ * arm64/include/param.h (STACKLIGN() macro)
+ */
+ sp = (abi_ulong)(stack_base + stack_size) & ~(16 - 1);
sp = ROUND_DOWN(stack_base + stack_size, 16);
+ pstate_write(regs, PSTATE_MODE_EL0t);
This is the default in arm_cpu_reset_hold for user-only.
There should be no need to duplicate this.
r~
