Initial commit

tasks/bootdesc/SConstruct

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+#
+# Build script to autogenerate a bootdesc image
+#
+# Copyright (C) 2007 Bahadir Balban
+#
+import os
+import sys
+import shutil
+from os.path import join
+
+# The root directory of the repository where this file resides:
+project_root = "../.."
+tools_root = "../../tools"
+
+kernel = join(project_root, "build/start.axf")
+mm0 = join(project_root, "tasks/mm0/mm0.axf")
+# fs0 = join(project_root, "tasks/fs0/fs0.axf")
+test0 = join(project_root, "tasks/test0/test0.axf")
+test1 = join(project_root, "tasks/test1/test1.axf")
+#blkdev0 = join(project_root, "tasks/fsbin/blkdev0.axf")
+
+images = [kernel, mm0, test0, test1]
+autogen_templ = "bootdesc.c.append"
+
+def get_image_name_start_end(image, target):
+	'''
+	Using readelf.py utility, extracts name, start, end triplet from an arm-elf image.
+	'''
+	rest, name = os.path.split(image)
+	if name[-4] == ".":
+		name = name[:-4]
+	os.system(join(tools_root, "pyelf/readelf.py --lma-start-end " + \
+		  image + " > " + target))
+
+bootdesc_template = \
+'''
+struct bootdesc bootdesc = {
+	.desc_size = sizeof(struct bootdesc) + sizeof(struct svc_image) * %s,
+	.total_images = %s,
+	.images = {
+%s
+	},
+};
+'''
+
+images_template = \
+'''		[%s] = {
+			.name = "%s",
+			.phys_start = %s,
+			.phys_end = %s,
+		},
+'''
+
+images_template_end = \
+'''
+	},
+'''
+
+def generate_bootdesc(source, target, env):
+	'''
+	Extracts name, start, end information from the kernel and each svc task.
+	Uses this information to produce bootdesc.c
+	'''
+	source.sort()
+	images = []
+	images_string = ""
+	for node in source:
+		if str(node)[-4:] == ".axf":
+			rest, imgname = os.path.split(str(node))
+			images.append((str(node), imgname[:-4]))
+		elif str(node) [-6:] == ".templ":
+			# Static template that has type definitions.
+			#rest, original_template = os.path.split(str(node))
+			original_template = str(node)
+	index = 0
+	for imgpath, imgname in images:
+		get_image_name_start_end(imgpath, imgname + ".txt")
+		if imgname != "start":
+			f = open(imgname + ".txt", "r")
+			svc_name = f.readline()[:-1]
+			[start, startval] = str.split(f.readline()[:-1])
+			[end, endval] = str.split(f.readline()[:-1])
+			f.close()
+			images_string += images_template % (str(index), svc_name, \
+			hex(int(startval, 16)), hex(int(endval, 16)))
+			index += 1
+
+	# Autogenerated template with actual data.
+	autogen_template = open(autogen_templ, "w+")
+	autogen_template.write(bootdesc_template % (str(index), str(index), images_string))
+	autogen_template.close()
+
+	os.system("cat " + original_template + " > " + str(target[0]))
+	os.system("cat " + autogen_templ + " >> " + str(target[0]))
+
+def relocate_bootdesc(source, target, env):
+	f = open("start.txt", "r")
+	kernel_name = f.readline()[:-1]
+	[start, startval] = str.split(f.readline()[:-1])
+	[end, endval] = str.split(f.readline()[:-1])
+	os.system("arm-none-linux-gnueabi-objcopy --adjust-section-vma .data=" + \
+		  hex(int(endval,16)) + " " + str(source[0]))
+	os.system("mv " + str(source[0]) + " " + str(target[0]))
+# The kernel build environment:
+env = Environment(CC = 'arm-none-linux-gnueabi-gcc',
+		  # We don't use -nostdinc because sometimes we need standard headers,
+		  # such as stdarg.h e.g. for variable args, as in printk().
+		  CCFLAGS = ['-g', '-nostdlib', '-ffreestanding', '-std=gnu99', '-Wall', '-Werror'],
+		  LINKFLAGS = ['-nostdlib','-Tlinker.lds'],
+		  ASFLAGS = ['-D__ASSEMBLY__'],
+		  PROGSUFFIX = '.axf',			# The suffix to use for final executable
+		  ENV = {'PATH' : os.environ['PATH']},	# Inherit shell path
+		  LIBS = 'gcc',				# libgcc.a - This is required for division routines.
+		  CPPPATH = '#include')			# `hash' ('#') is a shorthand meaning `relative to
+							# the root directory'. But this only works for
+							# well-defined variables, not all paths, and only
+							# if we use a relative build directory for sources.
+
+bootdesc_src = env.Command("bootdesc.c", ["bootdesc.c.templ"] + images, generate_bootdesc)
+objs = env.Object('bootdesc.c')
+bootdesc = env.Program('bootdesc_data', objs)
+bootdesc_relocated = env.Command("bootdesc.axf", "bootdesc_data.axf", relocate_bootdesc)
+env.Depends(bootdesc_relocated, bootdesc)

tasks/bootdesc/bootdesc.c.append

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+
+struct bootdesc bootdesc = {
+	.desc_size = sizeof(struct bootdesc) + sizeof(struct svc_image) * 3,
+	.total_images = 3,
+	.images = {
+		[0] = {
+			.name = "mm0",
+			.phys_start = 0x208000,
+			.phys_end = 0x213140,
+		},
+		[1] = {
+			.name = "test0",
+			.phys_start = 0x218000,
+			.phys_end = 0x21aedc,
+		},
+		[2] = {
+			.name = "romfs",
+			.phys_start = 0x220000,
+			.phys_end = 0x268800,
+		},
+
+	},
+};

tasks/bootdesc/bootdesc.c.orig

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+
+
+/* Supervisor task at load time. */
+struct svc_image {
+	char name[16];
+	unsigned int phys_start;
+	unsigned int phys_end;
+} __attribute__((__packed__));
+
+/* Supervisor task descriptor at load time */
+struct bootdesc {
+	int desc_size;
+	int total_images;
+	struct svc_image images[];
+} __attribute__((__packed__));
+
+
+struct bootdesc bootdesc = {
+	.desc_size = sizeof(struct bootdesc) + sizeof(struct svc_image) * 3,
+	.total_images = 3,
+	.images = {
+		[0] = {
+			.name = "inittask",
+			.phys_start = 0x208000,
+			.phys_end = 0x213260,
+		},
+		[1] = {
+			.name = "roottask",
+			.phys_start = 0x218000,
+			.phys_end = 0x21b344,
+		},
+		[2] = {
+			.name = "testtask",
+			.phys_start = 0x220000,
+			.phys_end = 0x223344,
+		},
+
+	},
+};

tasks/bootdesc/bootdesc.c.templ

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+
+
+/* Supervisor task at load time. */
+struct svc_image {
+	char name[16];
+	unsigned int phys_start;
+	unsigned int phys_end;
+} __attribute__((__packed__));
+
+/* Supervisor task descriptor at load time */
+struct bootdesc {
+	int desc_size;
+	int total_images;
+	struct svc_image images[];
+} __attribute__((__packed__));
+

tasks/bootdesc/fs0.txt

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+fs0
+image_start 0x218000
+image_end 0x21B26C

tasks/bootdesc/inittask.txt

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+inittask
+image_start 0x208000
+image_end 0x213260

tasks/bootdesc/linker.lds

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+ENTRY(_start)
+
+SECTIONS
+{
+	_start = .;
+	.data : { *(.data) }
+	_end = .;
+}

tasks/bootdesc/mm0.txt

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+mm0
+image_start 0x208000
+image_end 0x213140

tasks/bootdesc/romfs.txt

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+romfs
+image_start 0x220000
+image_end 0x268800

tasks/bootdesc/roottask.txt

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+roottask
+image_start 0x218000
+image_end 0x21B344

tasks/bootdesc/start.txt

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+start
+image_start 0x100000
+image_end 0x205800

tasks/bootdesc/test0.txt

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+test0
+image_start 0x218000
+image_end 0x21AEDC

tasks/bootdesc/testtask.txt

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+testtask
+image_start 0x220000
+image_end 0x223344