plat/arm/board/arm_fpga: Enable basic BL31 port for an FPGA image
This adds the minimal functions and definitions to create a basic
BL31 port for an initial FPGA image, in order for the port to be
uploaded to one the FPGA boards operated by an internal group within
Arm, such that BL31 runs as a payload for an image.
Future changes will enable the port for a wide range of system
configurations running on the FPGA boards to ensure compatibility with
multiple FPGA images.
It is expected that this will replace the FPGA fork of the Linux kernel
bootwrapper by performing similar secure-world initialization and setup
through the use of drivers and other well-established methods, before
passing control to the kernel, which will act as the BL33 payload and
run in EL2NS.
This change introduces a basic, loadable port with the console
initialized by setting the baud rate and base address of the UART as
configured by the Zeus image.
It is a BL31-only port, and RESET_TO_BL31 is enabled to reflect this.
Signed-off-by: Oliver Swede <oli.swede@arm.com>
Change-Id: I1817ad81be00afddcdbbda1ab70eb697203178e2
diff --git a/plat/arm/board/arm_fpga/platform.mk b/plat/arm/board/arm_fpga/platform.mk
new file mode 100644
index 0000000..73e1870
--- /dev/null
+++ b/plat/arm/board/arm_fpga/platform.mk
@@ -0,0 +1,59 @@
+#
+# Copyright (c) 2020, ARM Limited and Contributors. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+RESET_TO_BL31 := 1
+ifeq (${RESET_TO_BL31}, 0)
+$(error "This is a BL31-only port; RESET_TO_BL31 must be enabled")
+endif
+
+CTX_INCLUDE_AARCH32_REGS := 0
+ifeq (${CTX_INCLUDE_AARCH32_REGS}, 1)
+$(error "This is an AArch64-only port; CTX_INCLUDE_AARCH32_REGS must be disabled")
+endif
+
+ifeq (${TRUSTED_BOARD_BOOT}, 1)
+$(error "TRUSTED_BOARD_BOOT must be disabled")
+endif
+
+ifndef PRELOADED_BL33_BASE
+$(error "PRELOADED_BL33_BASE is not set")
+endif
+
+ifndef FPGA_PRELOADED_DTB_BASE
+$(error "FPGA_PRELOADED_DTB_BASE is not set")
+else
+$(eval $(call add_define,FPGA_PRELOADED_DTB_BASE))
+endif
+
+# Treating this as a memory-constrained port for now
+USE_COHERENT_MEM := 0
+
+# The CPU in the initial image makes use of this feature
+HW_ASSISTED_COHERENCY := 1
+
+FPGA_CPU_LIBS := lib/cpus/${ARCH}/aem_generic.S \
+ lib/cpus/aarch64/neoverse_zeus.S
+
+FPGA_GIC_SOURCES := drivers/arm/gic/common/gic_common.c \
+ drivers/arm/gic/v3/gicv3_main.c \
+ plat/common/plat_gicv3.c
+
+PLAT_INCLUDES := -Iplat/arm/board/arm_fpga/include
+
+PLAT_BL_COMMON_SOURCES := plat/arm/board/arm_fpga/${ARCH}/fpga_helpers.S
+
+BL31_SOURCES += drivers/delay_timer/delay_timer.c \
+ drivers/delay_timer/generic_delay_timer.c \
+ drivers/arm/pl011/${ARCH}/pl011_console.S \
+ plat/common/plat_psci_common.c \
+ plat/arm/board/arm_fpga/fpga_pm.c \
+ plat/arm/board/arm_fpga/fpga_topology.c \
+ plat/arm/board/arm_fpga/fpga_console.c \
+ plat/arm/board/arm_fpga/fpga_bl31_setup.c \
+ ${FPGA_CPU_LIBS} \
+ ${FPGA_GIC_SOURCES}
+
+all: bl31