blob: e8ac91b8e7b24754af556067c6522a655fd3315c (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
# Config for i386 Etherboot
#
# Do not delete the tag OptionDescription and /OptionDescription
# It is used to automatically generate the documentation.
#
# @OptionDescrition@
#
# BIOS interface options:
#
# -DPCBIOS
# Compile in support for the normal pcbios
# -DLINUXBIOS
# Compile in support for LinuxBIOS
# -DBBS_BUT_NOT_PNP_COMPLIANT
# Some BIOSes claim to be PNP but they don't conform
# to the BBS spec which specifies that ES:DI must
# point to the string $PnP on entry. This option
# works around those. This option must be added to
# LCONFIG.
# -DNO_DELAYED_INT
# Take control as soon as BIOS detects the ROM.
# Normally hooks onto INT18H or INT19H. Use only if you
# have a very non-conformant BIOS as it bypasses
# BIOS initialisation of devices. This only works for
# legacy ROMs, i.e. PCI_PNP_HEADER not defined.
# This option was formerly called NOINT19H.
# -DBOOT_INT18H
# Etherboot normally hooks onto INT19H for legacy ROMs.
# You can choose to hook onto INT18H (BASIC interpreter
# entry point) instead. This entry point is used when
# all boot devices have been exhausted. This option must
# be added to LCONFIG.
# -DCONFIG_PCI_DIRECT
# Define this for PCI BIOSes that do not implement
# BIOS32 or not correctly. Normally not needed.
# Only works for BIOSes of a certain era.
# -DCONFIG_TSC_CURRTICKS
# Uses the processor time stamp counter instead of reading
# the BIOS time counter. This allows Etherboot to work
# even without a BIOS. This only works on late model
# 486s and above.
# -DCONFIG_NO_TIMER2
# Some systems do not have timer2 implemented.
# If you have a RTC this will allow you to roughly calibrate
# it using outb instructions.
# -DIBM_L40
# This option uses the 0x92 method of controlling
# A20 instead of the traditional method of using the
# keyboard controller. An explanation of A20 is here:
# http://www.win.tue.nl/~aeb/linux/kbd/A20.html
# This occurs on MCA, EISA and some embedded boards,
# and sometimes with the Fast Gate A20 option on some
# BIOSes.
# Enable this only if you are sure of what you are doing.
#
# Extended cpu options
# -DCONFIG_X86_64
# Compile in support for booting x86_64 64bit binaries.
#
# PXE loader options:
#
# -DPXELOADER_KEEP_ALL
# Prevent PXE loader (prefix) from unloading the
# PXE stack. You will want to use this if, for
# example, you are booting via PXE-on-floppy.
# You may want to use it under certain
# circumstances when using the Etherboot UNDI
# driver; these are complex and best practice is
# not yet established.
#
# Obscure options you probably don't need to touch:
#
# -DIGNORE_E820_MAP
# Ignore the memory map returned by the E820 BIOS
# call. May be necessary on some buggy BIOSes.
# -DT503_AUI
# Use AUI by default on 3c503 cards.
# -DFLATTEN_REAL_MODE
# Use 4GB segment limits when calling out to or
# returning to real-mode code. This is necessary to
# work around some buggy code (e.g. OpenBSD's pxeboot)
# that uses flat real-mode without being sufficiently
# paranoid about the volatility of its segment limits.
#
# @/OptionDescription@
# BIOS select don't change unless you know what you are doing
CFLAGS+= -DPCBIOS
# Compile in k8/hammer support
# CFLAGS+= -DCONFIG_X86_64
# Options to make a version of Etherboot that will work under linuxBIOS.
# CFLAGS+= -DLINUXBIOS -DCONFIG_TSC_CURRTICKS -DCONSOLE_SERIAL -DCOMCONSOLE=0x3f8 -DCOMPRESERVE -DCONFIG_PCI_DIRECT -DELF_IMAGE
# These options affect the loader that is prepended to the Etherboot image
# LCONFIG+= -DBBS_BUT_NOT_PNP_COMPLIANT
# LCONFIG+= -DBOOT_INT18H
# Produce code that will work inside the Bochs emulator. The pnic
# driver is probably the best one to try.
# CFLAGS+= -DCONFIG_PCI_DIRECT
# Produce code that will work with OpenBSD's pxeboot
# CFLAGS+= -DFLATTEN_REAL_MODE
CFLAGS+= -fstrength-reduce -fomit-frame-pointer -march=i386
# Squeeze the code in as little space as possible.
# gcc3 needs a different syntax to gcc2 if you want to avoid spurious warnings.
GCC_VERSION = $(subst ., ,$(shell $(CC) -dumpversion))
GCC_MAJORVERSION = $(firstword $(GCC_VERSION))
ifeq ($(GCC_MAJORVERSION),2)
CFLAGS+= -malign-jumps=1 -malign-loops=1 -malign-functions=1
else
CFLAGS+= -falign-jumps=1 -falign-loops=1 -falign-functions=1
endif
GCC_MINORVERSION = $(word 2, $(GCC_VERSION))
ifneq ($(GCC_MINORVERSION),4)
CFLAGS+= -mcpu=i386
endif
LDFLAGS+= -N
ifeq "$(shell uname -s)" "FreeBSD"
CFLAGS+= -DIMAGE_FREEBSD -DELF_IMAGE -DAOUT_IMAGE
endif
# An alternate location for isolinux.bin can be set here
# ISOLINUX_BIN=/path/to/isolinux.bin
|
