mb/lowrisc: Remove the Nexys4DDR port

This board doesn't support the newest RISC-V Privileged Architecture
spec (1.10), and it's based on an FPGA so it's a moving target.

Now that there's actual RISC-V silicon out there (from SiFive),
mb/lowrisc/nexys4ddr will only continue to bitrot.

Change-Id: I4e3e715106a1a94381a563dc4a56781c35883c2d
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/28706
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Hug <philipp@hug.cx>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

18 files changed, 1 insertions, 322 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index ca8a6f2a74..4d27129c0a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -124,10 +124,8 @@ M:	Ronald Minnich <rminnich@gmail.com>
 M:	Jonathan Neuschäfer <j.neuschaefer@gmx.net>
 S:	Maintained
 F:	src/arch/riscv/
-F:	src/soc/lowrisc
 F:	src/soc/ucb/
 F:	src/mainboard/emulation/*-riscv/
-F:	src/mainboard/lowrisc
 
 POWER8 ARCHITECTURE
 M:	Ronald Minnich <rminnich@gmail.com>
diff --git a/src/mainboard/lowrisc/Kconfig b/src/mainboard/lowrisc/Kconfig
deleted file mode 100644
index ba0fbe7499..0000000000
--- a/src/mainboard/lowrisc/Kconfig
+++ /dev/null
@@ -1,16 +0,0 @@
-if VENDOR_LOWRISC
-
-choice
-	prompt "Mainboard model"
-
-source "src/mainboard/lowrisc/*/Kconfig.name"
-
-endchoice
-
-source "src/mainboard/lowrisc/*/Kconfig"
-
-config MAINBOARD_VENDOR
-	string
-	default "lowrisc"
-
-endif # VENDOR_LOWRISC
diff --git a/src/mainboard/lowrisc/Kconfig.name b/src/mainboard/lowrisc/Kconfig.name
deleted file mode 100644
index 4c992fc2bb..0000000000
--- a/src/mainboard/lowrisc/Kconfig.name
+++ /dev/null
@@ -1,2 +0,0 @@
-config VENDOR_LOWRISC
-	bool "lowrisc"
diff --git a/src/mainboard/lowrisc/nexys4ddr/Kconfig b/src/mainboard/lowrisc/nexys4ddr/Kconfig
deleted file mode 100644
index 5a6bfb2503..0000000000
--- a/src/mainboard/lowrisc/nexys4ddr/Kconfig
+++ /dev/null
@@ -1,37 +0,0 @@
-##
-## This file is part of the coreboot project.
-##
-## Copyright (C) 2016 Google Inc.
-##
-## This software is licensed under the terms of the GNU General Public
-## License version 2, as published by the Free Software Foundation, and
-## may be copied, distributed, and modified under those terms.
-##
-## This program 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 General Public License for more details.
-
-if BOARD_LOWRISC_NEXYS4DDR
-
-config BOARD_SPECIFIC_OPTIONS # dummy
-	def_bool y
-	select SOC_LOWRISC_LOWRISC
-	select BOARD_ROMSIZE_KB_4096
-	select DRIVERS_UART_8250MEM
-	select BOOT_DEVICE_NOT_SPI_FLASH
-	select UART_OVERRIDE_REFCLK
-
-config MAINBOARD_DIR
-	string
-	default lowrisc/nexys4ddr
-
-config MAINBOARD_PART_NUMBER
-	string
-	default "LOWRISC NEXYS4DDR"
-
-config MAX_CPUS
-	int
-	default 1
-
-endif #  BOARD_LOWRISC_NEXYS4DDR
diff --git a/src/mainboard/lowrisc/nexys4ddr/Kconfig.name b/src/mainboard/lowrisc/nexys4ddr/Kconfig.name
deleted file mode 100644
index f99b3cc649..0000000000
--- a/src/mainboard/lowrisc/nexys4ddr/Kconfig.name
+++ /dev/null
@@ -1,2 +0,0 @@
-config BOARD_LOWRISC_NEXYS4DDR
-	bool "nexys4ddr"
diff --git a/src/mainboard/lowrisc/nexys4ddr/Makefile.inc b/src/mainboard/lowrisc/nexys4ddr/Makefile.inc
deleted file mode 100644
index abd341c5d7..0000000000
--- a/src/mainboard/lowrisc/nexys4ddr/Makefile.inc
+++ /dev/null
@@ -1,25 +0,0 @@
-##
-## This file is part of the coreboot project.
-##
-## Copyright (C) 2016 Google Inc.
-##
-## This software is licensed under the terms of the GNU General Public
-## License version 2, as published by the Free Software Foundation, and
-## may be copied, distributed, and modified under those terms.
-##
-## This program 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 General Public License for more details.
-
-bootblock-y += uart.c
-bootblock-y += rom_media.c
-romstage-y += romstage.c
-romstage-y += uart.c
-romstage-y += rom_media.c
-ramstage-y += uart.c
-ramstage-y += rom_media.c
-
-bootblock-y += memlayout.ld
-romstage-y += memlayout.ld
-ramstage-y += memlayout.ld
diff --git a/src/mainboard/lowrisc/nexys4ddr/board_info.txt b/src/mainboard/lowrisc/nexys4ddr/board_info.txt
deleted file mode 100644
index a305030ddb..0000000000
--- a/src/mainboard/lowrisc/nexys4ddr/board_info.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-Board name: lowrisc nexys4ddr
-Category: eval
-Board URL: https://www.google.com/search?q=Tutorial+for+the+debug+preview+of+lowRISC&oq=Tutorial+for+the+debug+preview+of+lowRISC&btnI
diff --git a/src/mainboard/lowrisc/nexys4ddr/devicetree.cb b/src/mainboard/lowrisc/nexys4ddr/devicetree.cb
deleted file mode 100644
index e857276d5f..0000000000
--- a/src/mainboard/lowrisc/nexys4ddr/devicetree.cb
+++ /dev/null
@@ -1,20 +0,0 @@
-##
-## This file is part of the coreboot project.
-##
-## Copyright (C) 2016 Google, Inc.
-##
-## This software is licensed under the terms of the GNU General Public
-## License version 2, as published by the Free Software Foundation, and
-## may be copied, distributed, and modified under those terms.
-##
-## This program 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 General Public License for more details.
-
-chip soc/ucb/riscv
-	device cpu_cluster 0 on end
-	chip drivers/generic/generic # I2C0 controller
-		device i2c 6 on end # Fake component for testing
-	end
-end
diff --git a/src/mainboard/lowrisc/nexys4ddr/mainboard.c b/src/mainboard/lowrisc/nexys4ddr/mainboard.c
deleted file mode 100644
index 3ef833741d..0000000000
--- a/src/mainboard/lowrisc/nexys4ddr/mainboard.c
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2016 Google, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program 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 General Public License for more details.
- */
-
-#include <cbmem.h>
-#include <device/device.h>
-#include <symbols.h>
-
-static void mainboard_enable(struct device *dev)
-{
-	uintptr_t ram_base;
-	size_t ram_size;
-
-	/* FIXME: These values shouldn't necessarily be hardcoded */
-	ram_base = 0x80000000;
-	ram_size = 128 * MiB;
-	ram_resource(dev, 0, ram_base / KiB, ram_size / KiB);
-
-	cbmem_initialize_empty();
-}
-
-struct chip_operations mainboard_ops = {
-	.enable_dev = mainboard_enable,
-};
diff --git a/src/mainboard/lowrisc/nexys4ddr/memlayout.ld b/src/mainboard/lowrisc/nexys4ddr/memlayout.ld
deleted file mode 100644
index 86f3667556..0000000000
--- a/src/mainboard/lowrisc/nexys4ddr/memlayout.ld
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright 2016 Google Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program 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 General Public License for more details.
- */
-
-#include <memlayout.h>
-
-#include <arch/header.ld>
-
-#define START 0x80000000
-
-SECTIONS
-{
-	DRAM_START(START)
-	BOOTBLOCK(START, 64K)
-	STACK(START + 8M, 64K)
-	ROMSTAGE(START + 8M + 64K, 128K)
-	PRERAM_CBMEM_CONSOLE(START + 8M + 192k, 8K)
-	/* hole at (START + 8M + 200K, 56K) */
-	RAMSTAGE(START + 8M + 256K, 256K)
-}
diff --git a/src/mainboard/lowrisc/nexys4ddr/rom_media.c b/src/mainboard/lowrisc/nexys4ddr/rom_media.c
deleted file mode 100644
index 7d4ed00fe1..0000000000
--- a/src/mainboard/lowrisc/nexys4ddr/rom_media.c
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright 2015 Google Inc.
- * Copyright 2016 Jonathan Neuschäfer <j.neuschaefer@gmx.net>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; version 2 of
- * the License.
- *
- * This program 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 General Public License for more details.
- */
-#include <boot_device.h>
-#include <symbols.h>
-
-/*
- * _dram is the start of RAM. We currently need to load coreboot.rom into
- * RAM. The actual "rom" code on the FPGAs is in a block ram.
- */
-static const struct mem_region_device boot_dev =
-	MEM_REGION_DEV_RO_INIT(_dram, CONFIG_ROM_SIZE);
-
-const struct region_device *boot_device_ro(void)
-{
-	return &boot_dev.rdev;
-}
diff --git a/src/mainboard/lowrisc/nexys4ddr/romstage.c b/src/mainboard/lowrisc/nexys4ddr/romstage.c
deleted file mode 100644
index c918c83bdb..0000000000
--- a/src/mainboard/lowrisc/nexys4ddr/romstage.c
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2016 Google, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program 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 General Public License for more details.
- */
-
-#include <program_loading.h>
-#include <console/console.h>
-
-void main(void)
-{
-	console_init();
-	run_ramstage();
-}
diff --git a/src/mainboard/lowrisc/nexys4ddr/uart.c b/src/mainboard/lowrisc/nexys4ddr/uart.c
deleted file mode 100644
index 7758db355a..0000000000
--- a/src/mainboard/lowrisc/nexys4ddr/uart.c
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright 2016 Google Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program 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 General Public License for more details.
- */
-
-#include <types.h>
-#include <console/uart.h>
-#include <arch/io.h>
-#include <boot/coreboot_tables.h>
-
-uintptr_t uart_platform_base(int idx)
-{
-	return (uintptr_t) 0x42000000;
-}
-
-/* The clock which the UART is based on */
-unsigned int uart_platform_refclk(void)
-{
-	return 25 * MHz;
-}
diff --git a/src/soc/lowrisc/Kconfig b/src/soc/lowrisc/Kconfig
deleted file mode 100644
index a514135297..0000000000
--- a/src/soc/lowrisc/Kconfig
+++ /dev/null
@@ -1,2 +0,0 @@
-# Load all chipsets
-source "src/soc/lowrisc/*/Kconfig"
diff --git a/src/soc/lowrisc/lowrisc/Kconfig b/src/soc/lowrisc/lowrisc/Kconfig
deleted file mode 100644
index 8b35231642..0000000000
--- a/src/soc/lowrisc/lowrisc/Kconfig
+++ /dev/null
@@ -1,29 +0,0 @@
-config SOC_LOWRISC_LOWRISC
-	select ARCH_RISCV
-	select ARCH_BOOTBLOCK_RISCV
-	select ARCH_VERSTAGE_RISCV
-	select ARCH_ROMSTAGE_RISCV
-	select ARCH_RAMSTAGE_RISCV
-	select BOOTBLOCK_CONSOLE
-	select DRIVERS_UART_8250MEM_32
-	select GENERIC_UDELAY
-	select HAVE_MONOTONIC_TIMER
-	select RISCV_USE_ARCH_TIMER
-	bool
-	default n
-
-if SOC_LOWRISC_LOWRISC
-
-config RISCV_ARCH
-	string
-	default "rv64imafd"
-
-config RISCV_ABI
-	string
-	default "lp64d"
-
-config RISCV_CODEMODEL
-	string
-	default "medany"
-
-endif
diff --git a/src/soc/lowrisc/lowrisc/Makefile.inc b/src/soc/lowrisc/lowrisc/Makefile.inc
deleted file mode 100644
index ccd9a16945..0000000000
--- a/src/soc/lowrisc/lowrisc/Makefile.inc
+++ /dev/null
@@ -1,8 +0,0 @@
-ifeq ($(CONFIG_SOC_LOWRISC_LOWRISC),y)
-
-bootblock-y += mtime.c
-romstage-y += cbmem.c
-ramstage-y += cbmem.c
-ramstage-y += mtime.c
-
-endif
diff --git a/src/soc/lowrisc/lowrisc/cbmem.c b/src/soc/lowrisc/lowrisc/cbmem.c
deleted file mode 100644
index a21266608b..0000000000
--- a/src/soc/lowrisc/lowrisc/cbmem.c
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program 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 General Public License for more details.
- */
-
-#include <cbmem.h>
-
-void *cbmem_top(void)
-{
-	uintptr_t base;
-	size_t size;
-
-	/* FIXME: These values shouldn't necessarily be hardcoded */
-	base = 0x80000000;
-	size = 128 * MiB;
-
-	return (void *)(base + size);
-}
diff --git a/util/release/genrelnotes b/util/release/genrelnotes
index dfdf21ee7f..3038eb3de8 100755
--- a/util/release/genrelnotes
+++ b/util/release/genrelnotes
@@ -349,7 +349,7 @@ get_log_dedupe "ARM" \
 
 get_log_dedupe "RISC-V" \
 	"$(for codedir in $(grep -rl "_RISCV" --include=Kconfig | grep -v 'payloads/\|drivers/\|vendorcode/\|console' ); do dirname "$codedir"; done | grep -v '^src$')" \
-	"riscv\|risc-v\|lowrisc\|sifive"
+	"riscv\|risc-v\|sifive"
 
 get_log_dedupe "MIPS" \
 	"$(for codedir in $(grep -rl "_MIPS" --include=Kconfig | \