Chameleon

Chameleon Commit Details

Date:2010-09-14 15:01:48 (4 years 8 days ago)
Author:Azimutz
Commit:529
Parents: 528
Message:Returning setting arch changes from rev 520 (Chazi).
Changes:
M/branches/azimutz/CleanCut/doc-azi/CHANGES.txt
M/branches/azimutz/CleanCut/doc-azi/README.txt
M/branches/azimutz/CleanCut/i386/boot2/boot.c
M/branches/azimutz/CleanCut/i386/boot2/boot.h

File differences

branches/azimutz/CleanCut/doc-azi/CHANGES.txt
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---------------//---------------//---------------
- (rev 335)
- (rev 335) (REVERTED to trunk way, rev 520)
Change: merged the educational side of arch=i386 + the practical one of -x32, into a simple 32
booter flag.
Type just 32 to get you booted into i386 arch.
Note: -x32 was removed from trunk on rev 377.
---------------//---------------//---------------
- (rev 335)
- (rev 335) (REMOVED, rev 520)
Change: added -legacy kernel flag. This flag tells the booter to load i386 arch before is passed to
the kernel. This procedure only needs to be done on Snow Leopard. -legacy tells the kernel
to disable "64 Bit Mode", which allows 64 bit processors to run 64 bit apps under i386
mach kernel.
Type -legacy to get you booted into i386 arch, Legacy Mode.
Type -legacy to get you booted into Legacy Mode.
Note: only useful on 64 bit processors.
Note: this flag is not really needed; typing "32 -legacy" (no "") does the trick. It's just handy!
Note: just out of curiosity and for those who don't know, Legacy Mode is in fact the mode used
by 32 bit "only" processors! Since OS X kernel can handle 64 bit apps even on i386 arch,
64 bit processors need this flag to disable any handling of 64 bit instructions, when
---------------//---------------//---------------
- (rev 335)
- (rev 335) (REVERTED to trunk way, rev 520)
Change: added 64 bit booter flag, to keep company to the 32 one :)
Motif: mainly to override 32 or -legacy if they are flagged on the Boot.plist.
trunk. More details on the README.txt , under Chazi project.
---------------//---------------//---------------
- (rev 520)
Change: removed -legacy flag interaction with the booter and reverted 32/64 flags to the trunk way.
Type arch=i386 to load i386 kernel architecture.
arch=x86_64 overrides i386 arch, if flagged on Boot.plist.
On Snow type arch=i386 -legacy to load i386 arch Legacy Mode.
Motif: don't want to contribute to confusion... and laziness ;)
---------------//---------------//---------------
Azimutz
branches/azimutz/CleanCut/doc-azi/README.txt
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About the CleanCut:
About CleanCut:
This is a "clean" cut of the Chazi project, it's not meant to be used!
If you want to test something, head to Chazi folder.
branches/azimutz/CleanCut/i386/boot2/boot.c
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// Other status (e.g. 0) means that we should proceed with boot.
// If cpu doesn't handle 64 bit instructions,...
if (!platformCPUFeature(CPU_FEATURE_EM64T) ||
// ... user forced i386 kernel architecture on cpu with "em64t"...
getValueForKey(kArchI386Flag, &val, &len, &bootInfo->bootConfig) ||
// ... or forced Legacy Mode...
getValueForKey(kLegacyModeFlag, &val, &len, &bootInfo->bootConfig))
// If cpu handles 64 bit instructions...
if (platformCPUFeature(CPU_FEATURE_EM64T))
{
// ... use i386 kernel arch.
archCpuType = CPU_TYPE_I386;
// use x86_64 kernel arch,...
archCpuType = CPU_TYPE_X86_64;
}
else
{
// Else use x86_64 kernel arch.
archCpuType = CPU_TYPE_X86_64;
// else use i386 kernel arch.
archCpuType = CPU_TYPE_I386;
}
// Override i386/-legacy, if flagged on Boot.plist.
if (getValueForKey(kArchX86_64Flag, &val, &len, &bootInfo->bootConfig))
// If user override...
if (getValueForKey(kArchKey, &val, &len, &bootInfo->bootConfig))
{
archCpuType = CPU_TYPE_X86_64;
// matches i386...
if (strncmp(val, "i386", 4) == 0)
{
// use i386 kernel arch.
archCpuType = CPU_TYPE_I386;
}
}
if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {
branches/azimutz/CleanCut/i386/boot2/boot.h
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#define kForceWake"ForceWake"// boot.c
#define kWakeImage"WakeImage"// boot.c
#define kProductVersion"ProductVersion"// boot.c
#define kArchKey"arch"// boot.c
#define kDSDTKey"DSDT"// acpi_patcher.c
#define kDropSSDT"DropSSDT"// acpi_patcher.c
#define kRestartFix"RestartFix" // acpi_patcher.c
#define kIgnoreCachesFlag"-f"// options.c
#define kIgnoreBootFileFlag"-F"// options.c
#define kSingleUserModeFlag"-s"// options.c
#define kArchI386Flag"32"// boot.c
#define kLegacyModeFlag"-legacy"// boot.c
#define kArchX86_64Flag"64"// boot.c
/*
* Booter behavior control

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Revision: 529