[PATCH] bsp/erc32: Improve pseudo-SMP support

[Sebastian Huber]

Add support for _SMP_Send_message() to the own processor.  This is
required by the smpmulticast01 test program.
---
 bsps/sparc/erc32/start/bspsmp.c          | 84 ++++++++++++++++++++++++++++++++
 c/src/lib/libbsp/sparc/erc32/Makefile.am |  3 +-
 2 files changed, 85 insertions(+), 2 deletions(-)
 create mode 100644 bsps/sparc/erc32/start/bspsmp.c

diff --git a/bsps/sparc/erc32/start/bspsmp.c b/bsps/sparc/erc32/start/bspsmp.c
new file mode 100644
index 0000000000..35ed2bd0d0
--- /dev/null
+++ b/bsps/sparc/erc32/start/bspsmp.c
@@ -0,0 +1,84 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (C) 2019 embedded brains GmbH
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <rtems/score/smpimpl.h>
+#include <rtems/score/assert.h>
+#include <rtems/sysinit.h>
+#include <bsp.h>
+
+#define IPI_VECTOR SPARC_SYNCHRONOUS_TRAP( 0x90 )
+
+uint32_t _CPU_SMP_Get_current_processor( void )
+{
+  return 0;
+}
+
+uint32_t _CPU_SMP_Initialize( void )
+{
+  return 1;
+}
+
+bool _CPU_SMP_Start_processor( uint32_t cpu_index )
+{
+  (void) cpu_index;
+  return true;
+}
+
+void _CPU_SMP_Finalize_initialization( uint32_t cpu_count )
+{
+  _Assert( cpu_count == 1 );
+  (void) cpu_count;
+}
+
+void _CPU_SMP_Prepare_start_multitasking( void )
+{
+}
+
+void _CPU_SMP_Send_interrupt( uint32_t target_processor_index )
+{
+  _Assert( target_processor_index == 0 );
+  (void) target_processor_index;
+  __asm__ volatile( "ta 0x10; nop " );
+}
+
+static rtems_isr bsp_inter_processor_interrupt(
+  rtems_vector_number vector
+)
+{
+  _SMP_Inter_processor_interrupt_handler( _Per_CPU_Get() );
+}
+
+static void erc32_install_inter_processor_interrupt( void )
+{
+  set_vector( bsp_inter_processor_interrupt, IPI_VECTOR, 1 );
+}
+
+RTEMS_SYSINIT_ITEM(
+  erc32_install_inter_processor_interrupt,
+  RTEMS_SYSINIT_BSP_PRE_DRIVERS,
+  RTEMS_SYSINIT_ORDER_LAST
+);
diff --git a/c/src/lib/libbsp/sparc/erc32/Makefile.am b/c/src/lib/libbsp/sparc/erc32/Makefile.am
index 994e55cc40..8cdd4581bf 100644
--- a/c/src/lib/libbsp/sparc/erc32/Makefile.am
+++ b/c/src/lib/libbsp/sparc/erc32/Makefile.am
@@ -55,8 +55,7 @@ librtemsbsp_a_SOURCES += ../../../../../../bsps/sparc/shared/irq/bsp_isr_handler
 librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/irq/irq-default-handler.c
 
 if HAS_SMP
-librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/start/bspsmp-dummy.c
-librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/start/getcurrentprocessor-zero.c
+librtemsbsp_a_SOURCES += ../../../../../../bsps/sparc/erc32/start/bspsmp.c
 endif
 
 if HAS_NETWORKING
-- 
2.16.4