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Root/branches/ErmaC/Enoch/doc/BootHelp.txt

1The boot: prompt waits for you to type advanced startup options.
2If you don't type anything, the computer continues starting up normally. It
3uses the kernel and configuration files on the startup device, which it also
4uses as the root device.
5
6Advanced startup options use the following syntax:
7
8 [device]<kernel> [arguments]
9
10Example arguments include
11
12 device: rd=<BSD device name> (e.g. rd=disk0s2)
13 rd=*<IODeviceTree path> (e.g. rd=*/PCI0@0/CHN0@0/@0:1)
14
15 kernel: kernel name (e.g. "mach_kernel" - must be in "/" )
16
17 flags: -v (verbose), -s (single user mode),
18 -x (safe mode), -f (ignore caches),
19 -F (ignore "Kernel Flags" specified in boot configuration file)
20
21 "Graphics Mode"="WIDTHxHEIGHTxDEPTH" (e.g. "1024x768x32")
22
23 kernel flags (e.g. debug=0x144)
24 io=0xffffffff (defined in IOKit/IOKitDebug.h)
25
26Example: mach_kernel rd=disk0s1 -v "Graphics Mode"="1920x1200x32"
27
28If the computer won't start up properly, you may be able to start it up using
29safe mode. Type -x to start up in safe mode, which ignores all cached
30driver files.
31
32Special booter hotkeys:
33-----------------------
34 F5 Rescans optical drive.
35 F10 Scans and displays all BIOS accessible drives.
36
37Special booter commands:
38------------------------
39 ?memory Displays information about the computer's memory.
40 ?video Displays VESA video modes supported by the computer's BIOS.
41 ?norescan Leaves optical drive rescan mode.
42
43Additional useful command-line options:
44---------------------------------------
45 config=<file> Use an alternate Boot.plist file.
46
47Options useful in the org.chameleon.Boot.plist file:
48----------------------------------------------------
49 Wait=Yes|No Prompt for a key press before starting the kernel.
50 "Quiet Boot"=Yes|No Use quiet boot mode (no messages or prompt).
51 Timeout=8 Number of seconds to pause at the boot: prompt.
52 "Instant Menu"=Yes Force displaying the partition selection menu.
53
54 "Default Partition" Sets the default boot partition,
55 =hd(x,y)|UUID|"Label" Specified as a disk/partition pair, an UUID, or a
56 label enclosed in quotes.
57
58 "Hide Partition" Remove unwanted partition(s) from the boot menu.
59 =partition Specified, possibly multiple times, as hd(x,y), an
60 [;partition2 ...] UUID or label enclosed in quotes.
61
62 "Rename Partition" Rename partition(s) for the boot menu.
63 =partition <alias> Where partition is hd(x,y), UUID or label enclosed
64 [;partition2 <alias2> in quotes. The alias can optionally be quoted too.
65 ...]
66
67 GUI=No Disable the GUI (enabled by default).
68 "Boot Banner"=Yes|No Show boot banner in GUI mode (disabled by default).
69 ShowInfo=No Disables display of partition and resolution details.
70 "Boot Banner"=No will also disable this info.
71 "Legacy Logo"=Yes|No Use the legacy grey apple logo (disabled by default).
72
73 PciRoot=<value> Use an alternate value for PciRoot (default value 0).
74
75 UseKernelCache=Yes|No Yes will load pre-linked kernel and will ignore /E/E
76 and /S/L/E/Extensions.mkext.
77Default is No but Yes if you use Lion on a Raid partition.
78
79 KeyLayout=keymap Use to change the keyboard mapping of the bootloader
80 (e.g. KeyLayout=mac-fr)
81
82 HDAEnabler=Yes|No Automatic device-properties generation for audio controllers.
83 HDEFLayoutID=<value> Inject alternate value of layout-id for HDEF (HEX).
84 HDAULayoutID=<value> Inject alternate value of layout-id for HDAU (HEX).
85
86 GraphicsEnabler=Yes|No Automatic device-properties generation for graphics cards.
87 SkipIntelGfx=Yes|No Skip the Automatic device-properties generation for Intel cards.
88 SkipNvidiaGfx=Yes|No Skip the Automatic device-properties generation for Nvidia cards.
89 SkipAtiGfx=Yes|No Skip the Automatic device-properties generation for Ati cards.
90
91 NvidiaGeneric =Yes|No Use the old style name card for Nvidia into SystemProfiler (disabled by default).
92
93 AtiConfig=<cardcfg> Use a different card config, e.g. AtiConfig=Megalodon.
94 AtiPorts=<value> Specify the number of ports, e.g. AtiPorts=2.
95 UseAtiROM=Yes|No Use an alternate Ati ROM image
96 (default path: /Extra/<vendorid>_<devid>_<subsysid>.rom)
97 UseNvidiaROM=Yes|No Use an alternate Nvidia ROM image
98 (default path: /Extra/<vendorid>_<devid>.rom)
99 VBIOS=Yes|No Inject VBIOS to device-properties.
100 display_0=<value> Inject alternate value of display-cfg into NVDA,Display-A@0 (HEX).
101 display_1=<value> Inject alternate value of display-cfg into NVDA,Display-B@1 (HEX).
102 IntelCapriFB=<value> For Intel HD 4xxx, range 0-11.
103 IntelAzulFB=<value> For Intel HD 5xxx/IRIS, range 0-15.
104 InjectIntel-ig=<value> Inject alternate value into AAPL,ig-platform-id (HEX).
105
106 EnableBacklight=Yes Enable Back light option for NVIDIA and ATI
107 EnableDualLink=Yes Enable DualLink option for NVIDIA and ATI
108 EnableHDMIAudio=Yes Inject HDMI audio for NVIDIA and ATI.
109
110 EthernetBuiltIn=Yes|No Automatic "built-in"=YES device-properties generation
111 for ethernet interfaces.
112 ForceHPET=Yes|No Force HPET on (disabled by default).
113
114 USBBusFix=Yes Enable the EHCI and UHCI fixes (disabled by default).
115 EHCIacquire=Yes Enable the EHCI fix (disabled by default).
116 UHCIreset=Yes Enable the UHCI fix (disabled by default).
117 USBLegacyOff=Yes Force USB Legacy off (disabled by default).
118
119 Wake=No Disable wake up after hibernation (enbaled by default).
120 ForceWake=Yes Force using the sleepimage (disabled by default).
121 WakeImage=<file> Use an alternate sleepimage file
122 (default path is /private/var/vm/sleepimage).
123
124 DropSSDT=Yes Skip the SSDT tables while relocating the ACPI tables.
125 Drop<file>=Yes Skip:[HPET, SLIC, SBST, ECDT, ASF! or DMAR]
126
127 DSDT=<file> Use an alternate DSDT.aml file
128 (default path: /DSDT.aml
129 /Extra/DSDT.aml bt(0,0)/Extra/DSDT.aml).
130 HPET=<file> Use an alternate HPET.aml file
131 (default path: /HPET.aml
132 /Extra/HPET.aml bt(0,0)/Extra/HPET.aml).
133 SBST=<file> Use an alternate SBST.aml file
134 (default path: /SBST.aml
135 /Extra/SBST.aml bt(0,0)/Extra/SBST.aml).
136 ECDT=<file> Use an alternate ECDT.aml file
137 (default path: /ECDT.aml
138 /Extra/ECDT.aml bt(0,0)/Extra/ECDT.aml).
139 ASFT=<file> Use an alternate ASFT.aml file
140 (default path: /ASFT.aml
141 /Extra/ASFT.aml bt(0,0)/Extra/ASFT.aml).
142 DMAR=<file> Use an alternate DMAR.aml file
143 (default path: /DMAR.aml
144 /Extra/DMAR.aml bt(0,0)/Extra/DMAR.aml).
145 APIC=<file> Use an alternate APIC.aml file
146 (default path: /APIC.aml
147 /Extra/APIC.aml bt(0,0)/Extra/APIC.aml).
148 MCFG=<file> Use an alternate MCFG.aml file
149 (default path: /MCFG.aml
150 /Extra/MCFG.aml bt(0,0)/Extra/MCFG.aml).
151 FADT=<file> Use an alternate FADT.aml file
152 (default path: /FADT.aml
153 /Extra/FADT.aml bt(0,0)/Extra/FADT.aml).
154
155 GenerateCStates=Yes Enable auto generation of processor idle sleep states
156 (C-States).
157 GeneratePStates=Yes Enable auto generation of processor power performance
158 states (P-States).
159 CSTUsingSystemIO=Yes New C-State _CST generation method using SystemIO
160 registers instead of FixedHW.
161
162 EnableC2State=Yes Enable specific Processor power state, C2.
163 EnableC3State=Yes Enable specific Processor power state, C3.
164 EnableC4State=Yes Enable specific Processor power state, C4.
165
166 ForceFullMemInfo=Yes Force SMBIOS Table 17 to be 27 bytes long (disabled by default).
167
168 SMBIOS=<file> Use an alternate SMBIOS.plist file
169 (default path: /smbios.plist /Extra/smbios.plist
170 bt(0,0)/Extra/smbios.plist).
171
172 SMBIOSdefaults=No Don't use the Default values for SMBIOS overriding
173 if smbios.plist doesn't exist, factory
174 values are kept.
175
176 "Scan Single Drive" Scan the drive only where the booter got loaded from.
177 =Yes|No Fix rescan issues when using a DVD reader in AHCI mode.
178 Rescan=Yes Enable CD-ROM rescan mode.
179 "Rescan Prompt"=Yes Prompts for enable CD-ROM rescan mode.
180 SystemId=<UUID> Set the system id manually to UUID.
181 Deprecated - Now SMsystemuuid in smbios.plist
182 SMUUID in smbios config (reserved field) isn't used then.
183 SystemType=<n> Set the system type to n, where n is between 0..6
184 (default=1 Desktop)
185 md0=<file> Load raw img file into memory for use as XNU's md0
186 ramdisk. /Extra/Postboot.img is used otherwise.
187

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