Qorvo pac55xx: initial support

Qorvo (Nee Active Semi) PAC55xx "Intelligent Motor Control" parts,
cortex-m4 SoCs

lib/dispatch/vector_chipset.c

@@ -16,6 +16,8 @@
 #	include "../efm32/wg/vector_chipset.c"
 #elif defined(EZR32WG)
 #	include "../efm32/ezr32wg/vector_chipset.c"
+#elif defined(PAC55XX)
+#	include "../pac55xx/vector_chipset.c"
 #else
 
 static void pre_main(void) {}

lib/dispatch/vector_nvic.c

@@ -64,6 +64,10 @@
 #elif defined(VF6XX)
 #	include "../vf6xx/vector_nvic.c"
 
+#elif defined(PAC55XX)
+#       include "../pac55xx/vector_nvic.c"
+
+
 #elif defined(LM3S) || defined(LM4F)
 /* Yes, we use the same interrupt table for both LM3S and LM4F */
 #	include "../lm3s/vector_nvic.c"

lib/pac55xx/Makefile

@@ -0,0 +1,41 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2019 Brian Viele <vielster@allocor.tech>
+##
+## 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 3 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/>.
+##
+## The PAC55xx by Qorvo (formerly ActiveSemi) is a Cortex-M4F based device
+## which is specialized for motor control and PSC applications. 
+
+LIBNAME		= libopencm3_pac55xx
+SRCLIBDIR	?= ..
+FP_FLAGS	?= -mfloat-abi=hard -mfpu=fpv4-sp-d16
+CC		= $(PREFIX)gcc
+AR		= $(PREFIX)ar
+TGT_CFLAGS	= -Os \
+		  -Wall -Wextra -Wimplicit-function-declaration \
+		  -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
+		  -Wundef -Wshadow \
+		  -I../../include -fno-common \
+		  -mcpu=cortex-m4 -mthumb $(FP_FLAGS) -Wstrict-prototypes \
+		  -ffunction-sections -fdata-sections -MD -DPAC55XX
+TGT_CFLAGS  += $(DEBUG_FLAGS)
+TGT_CFLAGS  += $(STANDARD_FLAGS)
+ARFLAGS		= rcs
+
+VPATH += ../cm3
+
+
+include ../Makefile.include

lib/pac55xx/vector_chipset.c

@@ -0,0 +1,25 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2019 Brian Viele <vielster@allocor.tech>
+ *
+ * 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 3 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/>.
+ */
+
+/* Standard Cortex-M4F initialization of FPU. */
+static void pre_main(void)
+{
+	/* Enable FPU */
+	SCB_CPACR |= SCB_CPACR_FULL * (SCB_CPACR_CP10 | SCB_CPACR_CP11);
+}