arch/: Implement up_tls_info() for the rest of the architectures.

2026-05-30 05:16:47 +08:00 · 2020-05-07 00:32:41 +01:00
parent 1e3ec6ecd0
commit a4dd967440
24 changed files with 1628 additions and 7 deletions
@@ -0,0 +1,92 @@
+/****************************************************************************
+ * arch/misoc/include/tls.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_MISOC_INCLUDE_TLS_H
+#define __ARCH_MISOC_INCLUDE_TLS_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <assert.h>
+#include <nuttx/arch.h>
+#include <nuttx/tls.h>
+
+#ifdef CONFIG_TLS
+
+/****************************************************************************
+ * Inline Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: misoc_getsp
+ ****************************************************************************/
+
+static inline uint32_t misoc_getsp(void)
+{
+  register uint32_t sp;
+
+  __asm__ __volatile__("addi %0, sp, 0" : "=r" (sp));
+
+  return sp;
+}
+
+
+/****************************************************************************
+ * Name: up_tls_info
+ *
+ * Description:
+ *   Return the TLS information structure for the currently executing thread.
+ *   When TLS is enabled, up_createstack() will align allocated stacks to
+ *   the TLS_STACK_ALIGN value.  An instance of the following structure will
+ *   be implicitly positioned at the "lower" end of the stack.  Assuming a
+ *   "push down" stack, this is at the "far" end of the stack (and can be
+ *   clobbered if the stack overflows).
+ *
+ *   If an MCU has a "push up" then that TLS structure will lie at the top
+ *   of the stack and stack allocation and initialization logic must take
+ *   care to preserve this structure content.
+ *
+ *   The stack memory is fully accessible to user mode threads.
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   A pointer to TLS info structure at the beginning of the STACK memory
+ *   allocation.  This is essentially an application of the TLS_INFO(sp)
+ *   macro and has a platform dependency only in the manner in which the
+ *   stack pointer (sp) is obtained and interpreted.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_TLS_ALIGNED
+static inline FAR struct tls_info_s *up_tls_info(void)
+{
+  DEBUGASSERT(!up_interrupt_context());
+  return TLS_INFO((uintptr_t)misoc_getsp());
+}
+#else
+#  define up_tls_info() tls_get_info()
+#endif
+
+#endif /* CONFIG_TLS */
+#endif /* __ARCH_MISOC_INCLUDE_TLS_H */