payloads: add iPXE 'payload' build

We already have the ability to add a pxe rom to cbfs, but it needs to be
configured and built separately.

This moves the existing Kconfig options for PXE from device/Kconfig and
the top level Makefile.inc to payloads, and adds the option to download
and build iPXE as part of the coreboot build process.

This configures the serial output of iPXE to match coreboot's serial
port configuration by editing the .h files. iPXE doesn't give any
real build-time method of setting these configuration options.

Change-Id: I3d77b2c6845b7f5f644440f6910c3b4533a0d415
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/14085
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

.gitignore

@@ -14,6 +14,7 @@ payloads/external/GRUB2/grub2/
 payloads/external/SeaBIOS/seabios/
 payloads/external/U-Boot/u-boot/
 payloads/external/Memtest86Plus/memtest86plus/
+payloads/external/iPXE/ipxe/
 util/crossgcc/acpica-unix-*/
 util/crossgcc/binutils-*/
 util/crossgcc/build-*BINUTILS/

Makefile.inc

@@ -829,10 +829,6 @@ cbfs-files-$(CONFIG_SEABIOS_VGA_COREBOOT) += vgaroms/seavgabios.bin
 vgaroms/seavgabios.bin-file := $(CONFIG_PAYLOAD_VGABIOS_FILE)
 vgaroms/seavgabios.bin-type := raw
 
-cbfs-files-$(CONFIG_PXE_ROM) += pci$(CONFIG_PXE_ROM_ID).rom
-pci$(CONFIG_PXE_ROM_ID).rom-file := $(CONFIG_PXE_ROM_FILE)
-pci$(CONFIG_PXE_ROM_ID).rom-type := raw
-
 cbfs-files-$(CONFIG_INCLUDE_CONFIG_FILE) += config
 config-file := $(DOTCONFIG):defconfig
 config-type := raw

payloads/Makefile.inc

@@ -23,7 +23,8 @@ payloads/libpayload \
 payloads/external/depthcharge \
 payloads/external/SeaBIOS \
 payloads/external/U-Boot \
-payloads/external/Memtest86Plus
+payloads/external/Memtest86Plus \
+payloads/external/iPXE
 
 payloads/coreinfo/build/coreinfo.elf coreinfo:
 	$(MAKE) -C payloads/coreinfo defaultbuild

payloads/external/Makefile.inc

@@ -112,3 +112,31 @@ payloads/external/Memtest86Plus/memtest86plus/memtest: $(top)/$(DOTCONFIG)
 		AS="$(AS_x86_32)" \
 		$(MEMTEST_SERIAL_OPTIONS) \
 		MFLAGS= MAKEFLAGS=
+
+PXE_ROM_PCI_ID:=$(subst $(comma),,$(CONFIG_PXE_ROM_ID))
+
+ifeq ($(CONFIG_PXE_ROM),y)
+PXE_ROM_FILE:=$(CONFIG_PXE_ROM_FILE)
+endif
+ifeq ($(CONFIG_BUILD_IPXE),y)
+PXE_ROM_FILE:=payloads/external/iPXE/ipxe/ipxe.rom
+endif
+
+ifeq ($(CONFIG_CONSOLE_SERIAL)$(CONFIG_DRIVERS_UART_8250IO),yy)
+IPXE_UART=COM$(call int-add,$(CONFIG_UART_FOR_CONSOLE) 1)
+endif
+
+cbfs-files-$(CONFIG_PXE_ROM)$(CONFIG_BUILD_IPXE) += pci$(CONFIG_PXE_ROM_ID).rom
+pci$(CONFIG_PXE_ROM_ID).rom-file := $(PXE_ROM_FILE)
+pci$(CONFIG_PXE_ROM_ID).rom-type := raw
+
+payloads/external/iPXE/ipxe/ipxe.rom ipxe: $(top)/$(DOTCONFIG)
+	$(MAKE) -C payloads/external/iPXE all \
+	CROSS_COMPILE="$(CROSS_COMPILE_$(ARCH-ramstage-y))" \
+	PXE_ROM_PCI_ID=$(PXE_ROM_PCI_ID) \
+	CONFIG_IPXE_MASTER=$(CONFIG_IPXE_MASTER) \
+	CONFIG_IPXE_STABLE=$(CONFIG_IPXE_STABLE) \
+	CONSOLE_SERIAL=$(CONFIG_CONSOLE_SERIAL)$(CONFIG_DRIVERS_UART_8250IO) \
+	IPXE_UART=$(IPXE_UART) \
+	CONFIG_TTYS0_BAUD=$(CONFIG_TTYS0_BAUD) \
+	MFLAGS= MAKEFLAGS=

payloads/external/iPXE/Kconfig

@@ -0,0 +1,74 @@
+##
+## 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.
+##
+
+choice
+	prompt "Add a PXE ROM"
+	default PXE_ROM
+	depends on ARCH_X86
+	optional
+
+config PXE_ROM
+	bool "Add an existing PXE ROM image"
+	help
+	  Select this option if you have a PXE ROM image that you would
+	  like to add to your ROM.
+
+config BUILD_IPXE
+	bool "Build and add an iPXE ROM"
+	help
+	  Select this option to fetch and build a ROM from the iPXE project.
+
+endchoice
+
+choice
+	prompt "iPXE version"
+	default IPXE_STABLE
+	depends on BUILD_IPXE
+
+config IPXE_STABLE
+	bool "2016.2"
+	help
+	  iPXE uses a rolling release with no stable version, for
+	  reproducibility, use the last commit of a given month as the
+	  'stable' version.
+	  This is iPXE from the end of February, 2016.
+
+config IPXE_MASTER
+	bool "master"
+	help
+	  Newest iPXE version.
+
+endchoice
+
+config PXE_ROM_FILE
+	string "PXE ROM filename"
+	depends on PXE_ROM
+	default "pxe.rom"
+	help
+	  The path and filename of the file to use as PXE ROM.
+
+config PXE_ROM_ID
+	string "network card PCI IDs"
+	depends on PXE_ROM || BUILD_IPXE
+	default "10ec,8168"
+	help
+	  The comma-separated PCI vendor and device ID that would associate
+	  your PXE ROM to your network card.
+
+	  Example: 10ec,8168
+
+	  In the above example 10ec is the PCI vendor ID (in hex, but without
+	  the "0x" prefix) and 8168 specifies the PCI device ID of the
+	  network card (also in hex, without "0x" prefix).
+
+	  Under GNU/Linux you can run `lspci -nn` to list the IDs of your PCI devices.

payloads/external/iPXE/Makefile

@@ -0,0 +1,74 @@
+##
+## 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.
+##
+
+# 2016.2 - Last commit of February 2016
+# When updating, change the name both here and in payloads/external/iPXE/Kconfig
+STABLE_COMMIT_ID=99b5216b1c71dba22dab734e0945887525493cde
+
+TAG-$(CONFIG_IPXE_MASTER)=origin/master
+TAG-$(CONFIG_IPXE_STABLE)=$(STABLE_COMMIT_ID)
+
+project_name=iPXE
+project_dir=ipxe
+project_git_repo=git://git.ipxe.org/ipxe.git
+
+all: build
+
+$(project_dir):
+	echo "    Cloning $(project_name) from Git"
+	git clone $(project_git_repo) $(project_dir)
+
+fetch: $(project_dir)
+	cd $(project_dir); \
+		git show $(TAG-y) >/dev/null 2>&1 ; \
+		if [ $$? -ne 0 ] || [ "$(TAG-y)" = "origin/master" ]; then \
+			echo "    Fetching new commits from the $(project_name) repo"; \
+			git fetch; \
+		fi
+
+checkout: fetch
+	echo "    Checking out $(project_name) revision $(TAG-y)"
+	cd  $(project_dir); \
+		git checkout master; \
+		git branch -D coreboot 2>/dev/null; \
+		git checkout -b coreboot $(TAG-y)
+
+config: checkout
+ifeq ($(CONSOLE_SERIAL),yy)
+	cp "$(project_dir)/src/config/console.h" "$(project_dir)/src/config/console.h.cb"
+	cp "$(project_dir)/src/config/serial.h" "$(project_dir)/src/config/serial.h.cb"
+	sed 's|//#define\s*CONSOLE_SERIAL.*|#define CONSOLE_SERIAL|' "$(project_dir)/src/config/console.h" > "$(project_dir)/src/config/console.h.tmp"
+	mv "$(project_dir)/src/config/console.h.tmp" "$(project_dir)/src/config/console.h"
+	sed 's|#define\s*COMCONSOLE.*|#define COMCONSOLE $(IPXE_UART)|' "$(project_dir)/src/config/serial.h" > "$(project_dir)/src/config/serial.h.tmp"
+	sed 's|#define\s*COMSPEED.*|#define COMSPEED $(CONFIG_TTYS0_BAUD)|'  "$(project_dir)/src/config/serial.h.tmp" > "$(project_dir)/src/config/serial.h"
+endif
+
+build: config
+	echo "    MAKE       $(project_name) $(TAG-y)"
+	$(MAKE) -C $(project_dir)/src bin/$(PXE_ROM_PCI_ID).rom
+	cp $(project_dir)/src/bin/$(PXE_ROM_PCI_ID).rom $(project_dir)/ipxe.rom
+ifeq ($(CONSOLE_SERIAL),yy)
+	cp "$(project_dir)/src/config/console.h.cb" "$(project_dir)/src/config/console.h"
+	cp "$(project_dir)/src/config/serial.h.cb" "$(project_dir)/src/config/serial.h"
+endif
+
+clean:
+	test -d $(project_dir) && $(MAKE) -C $(project_dir)/src veryclean || exit 0
+	rm -f $(project_dir)/ipxe.rom
+
+distclean:
+	rm -rf $(project_dir)
+
+.PHONY: all fetch config build clean distclean

src/device/Kconfig

@@ -351,36 +351,6 @@ config MBI_FILE
 	help
 	  The path and filename of the file to use as VGA BIOS.
 
-config PXE_ROM
-	bool "Add a PXE ROM image"
-	depends on ARCH_X86
-	help
-	  Select this option if you have a PXE ROM image that you would
-	  like to add to your ROM.
-
-config PXE_ROM_FILE
-	string "PXE ROM filename"
-	depends on PXE_ROM
-	default "pxe.rom"
-	help
-	  The path and filename of the file to use as PXE ROM.
-
-config PXE_ROM_ID
-	string "network card PCI IDs"
-	depends on PXE_ROM
-	default "10ec,8168"
-	help
-	  The comma-separated PCI vendor and device ID that would associate
-	  your PXE ROM to your network card.
-
-	  Example: 10ec,8168
-
-	  In the above example 10ec is the PCI vendor ID (in hex, but without
-	  the "0x" prefix) and 8168 specifies the PCI device ID of the
-	  network card (also in hex, without "0x" prefix).
-
-	  Under GNU/Linux you can run `lspci -nn` to list the IDs of your PCI devices.
-
 config SOFTWARE_I2C
 	bool "Enable I2C controller emulation in software"
 	default n