[PATCH 3/4] bsps/beagle: Added SOC detection using FDT
G S Niteesh Babu
niteesh.gs at gmail.com
Sat Mar 13 11:02:02 UTC 2021
Detects the SOC type using FDT and also replaces the ti_cpuid.h
header in FreeBSD with custom one.
---
bsps/arm/beagle/start/bsp-soc-detect.c | 55 ++++++++++++++++++++++++++
bsps/arm/beagle/start/bsp-soc-detect.h | 38 ++++++++++++++++++
bsps/arm/beagle/start/bspstart.c | 23 ++++++++---
bsps/include/arm/ti/ti_cpuid.h | 48 ++++++++++++++++++++++
spec/build/bsps/arm/beagle/obj.yml | 1 +
5 files changed, 159 insertions(+), 6 deletions(-)
create mode 100644 bsps/arm/beagle/start/bsp-soc-detect.c
create mode 100644 bsps/arm/beagle/start/bsp-soc-detect.h
create mode 100644 bsps/include/arm/ti/ti_cpuid.h
diff --git a/bsps/arm/beagle/start/bsp-soc-detect.c b/bsps/arm/beagle/start/bsp-soc-detect.c
new file mode 100644
index 0000000000..445c8881ff
--- /dev/null
+++ b/bsps/arm/beagle/start/bsp-soc-detect.c
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup arm_Beagle
+ *
+ * @brief
+ */
+
+/*
+ * Copyright (C) <2020> Niteesh Babu <niteesh.gs at gmail.com>
+ *
+ * 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/bspIo.h>
+#include <libfdt.h>
+#include <bsp/fdt.h>
+#include "bsp-soc-detect.h"
+
+int _ti_chip;
+
+void bsp_soc_detect( void )
+{
+ const void *fdt = bsp_fdt_get();
+
+ if (fdt_node_offset_by_compatible(fdt, -1, "ti_am33xx") != FDT_ERR_NOTFOUND) {
+ _ti_chip = CHIP_AM335X;
+ } else if (fdt_node_offset_by_compatible(fdt, -1, "ti_omap3") != FDT_ERR_NOTFOUND) {
+ _ti_chip = CHIP_OMAP_3;
+ } else {
+ printk("Unknown platform");
+ _ti_chip = -1;
+ }
+}
diff --git a/bsps/arm/beagle/start/bsp-soc-detect.h b/bsps/arm/beagle/start/bsp-soc-detect.h
new file mode 100644
index 0000000000..545bba3eaf
--- /dev/null
+++ b/bsps/arm/beagle/start/bsp-soc-detect.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup arm_Beagle
+ *
+ * @brief
+ */
+
+/*
+ * Copyright (C) <2020> Niteesh Babu <niteesh.gs at gmail.com>
+ *
+ * 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 <arm/ti/ti_cpuid.h>
+
+void bsp_soc_detect( void );
diff --git a/bsps/arm/beagle/start/bspstart.c b/bsps/arm/beagle/start/bspstart.c
index 3c05f2a9cd..0a6f1b4a64 100644
--- a/bsps/arm/beagle/start/bspstart.c
+++ b/bsps/arm/beagle/start/bspstart.c
@@ -19,17 +19,28 @@
#include <bsp/linker-symbols.h>
#include <bsp/i2c.h>
#include <rtems/sysinit.h>
+#include "bsp-soc-detect.h"
#include "bspdebug.h"
void bsp_start(void)
{
-#if IS_DM3730
- const char* type = "dm3730-based";
-#endif
-#if IS_AM335X
- const char* type = "am335x-based";
-#endif
+ const char *type;
+
+ bsp_soc_detect();
+
+ switch (ti_chip()) {
+ case CHIP_AM335X:
+ type = "am335x-based";
+ break;
+ case CHIP_OMAP_3:
+ type = "dm3730-based";
+ break;
+ default:
+ type = "Unknown SOC";
+ break;
+ }
+
bsp_interrupt_initialize();
printk("\nRTEMS Beagleboard: %s\n", type);
printk(" ARM Debug: 0x%08x\n", (intptr_t) bbb_arm_debug_registers());
diff --git a/bsps/include/arm/ti/ti_cpuid.h b/bsps/include/arm/ti/ti_cpuid.h
new file mode 100644
index 0000000000..9d533db5d3
--- /dev/null
+++ b/bsps/include/arm/ti/ti_cpuid.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup LIBFREEBSD
+ *
+ * @brief
+ */
+
+/*
+ * Copyright (C) <2020> Niteesh Babu <niteesh.gs at gmail.com>
+ *
+ * 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 <assert.h>
+
+#define SOC_TI_AM335X
+#define CHIP_OMAP_4 0
+#define CHIP_AM335X 1
+#define CHIP_OMAP_3 2
+
+extern int _ti_chip;
+
+static __inline int ti_chip(void)
+{
+ assert(_ti_chip != -1);
+ return _ti_chip;
+}
diff --git a/spec/build/bsps/arm/beagle/obj.yml b/spec/build/bsps/arm/beagle/obj.yml
index 908c188547..5ad859ad8d 100644
--- a/spec/build/bsps/arm/beagle/obj.yml
+++ b/spec/build/bsps/arm/beagle/obj.yml
@@ -39,6 +39,7 @@ source:
- bsps/arm/beagle/start/bspdebug.c
- bsps/arm/beagle/start/bspreset.c
- bsps/arm/beagle/start/bspstart.c
+- bsps/arm/beagle/start/bsp-soc-detect.c
- bsps/arm/beagle/start/bspstarthooks.c
- bsps/arm/beagle/start/bspstartmmu.c
- bsps/arm/shared/cache/cache-cp15.c
--
2.17.1
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