Chameleon

Chameleon Commit Details

Date:2010-07-26 02:25:56 (13 years 8 months ago)
Author:Evan Lojewski
Commit:256
Parents: 255
Message:Addid support for loading an md0 ramdisk and passing it to xnu
Changes:
M/trunk/i386/boot2/ramdisk.h
M/trunk/i386/boot2/boot.c
M/trunk/i386/boot2/boot.h
M/trunk/CHANGES
M/trunk/i386/boot2/ramdisk.c

File differences

trunk/CHANGES
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- md0 code. Notified xnu when an md ramdisk is specified␊
- Optimized memory detection speed␊
- Added displaying source device and partition number for file read operations.␊
- Increased boot2's maximum size from 383.5k to 447.5k.␊
trunk/i386/boot2/ramdisk.h
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#define __BOOT_RAMDISK_H␊
␊
#define RAMDISKCONFIG_FILENAME "rd(0,0)/RAMDisk.plist"␊
//#define kPostbootRamdisk␊
void md0Ramdisk();␊
␊
typedef struct RAMDiskParam␊
{␊
␉ppnum_t base;␊
␉unsigned int size;␊
} RAMDiskParam;␊
␊
/* mboot.c */␊
extern struct multiboot_info *gMI;␊
extern int multibootRamdiskReadBytes( int biosdev, unsigned int blkno,␊
trunk/i386/boot2/boot.c
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␊
setupFakeEfi();␊
␊
md0Ramdisk();␊
␊
verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊
␊
// Cleanup the PXE base code.␊
trunk/i386/boot2/boot.h
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#define kLegacyOff␉␉␉"USBLegacyOff"␉␉/* usb.c */␊
#define kEHCIhard␉␉␉"EHCIhard"␉␉␉/* usb.c */␊
#define kDefaultPartition␉"Default Partition"␉/* sys.c */␊
#define kMD0Image␉␉␉"md0"␉␉␉␉/* ramdisk.h */␊
␊
/*␊
* Flags to the booter or kernel␊
trunk/i386/boot2/ramdisk.c
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bool gRAMDiskBTAliased = false;␊
char gRAMDiskFile[512];␊
␊
␊
// Notify OS X that a ramdisk has been setup. XNU with attach this to /dev/md0␊
void md0Ramdisk()␊
{␊
␉RAMDiskParam ramdiskPtr;␊
␉char filename[512];␊
␉const char* override_filename = 0;␊
␉int fh = -1;␊
␉int len;␊
␉␊
␉if(getValueForKey(kMD0Image, &override_filename, &len, ␊
␉␉␉␉ &bootInfo->bootConfig))␊
␉{␊
␉␉// Use user specified md0 file␊
␉␉sprintf(filename, "%s", override_filename);␊
␉␉fh = open(filename, 0);␊
␉␉␊
␉␉if(fh < 0)␊
␉␉{␊
␉␉␉sprintf(filename, "rd(0,0)/Extra/%s", override_filename);␊
␉␉␉if((fh = open(filename, 0)) < 0)␊
␉␉␉{␊
␉␉␉␉sprintf(filename, "/Extra/%s", override_filename);␊
␉␉␉␉fh = open(filename, 0);␊
␉␉␉␉␊
␉␉␉}␊
␉␉}␉␉␊
␉}␊
␉␊
␉␊
␉if(fh < 0)␊
␉{␊
␉␉// Fallback to Postboot.img␊
␉␉sprintf(filename, "rd(0,0)/Extra/Postboot.img");␊
␉␉fh = open(filename, 0);␊
␉␉if(fh < 0)␊
␉␉{␊
␉␉␉sprintf(filename, "/Extra/Postboot.img");␉// Check /Extra if not in rd(0,0)␊
␉␉␉fh = open(filename, 0);␊
␉␉␉␊
␉␉}␊
␉}␉␉␊
␉␊
␉if (fh >= 0)␊
␉{␊
␉␉verbose("Enabling ramdisk %s\n", filename);␊
␊
␉␉ramdiskPtr.size = file_size(fh);␊
␉␉ramdiskPtr.base = AllocateKernelMemory(ramdiskPtr.size);␊
␉␉␊
␉␉if(ramdiskPtr.size && ramdiskPtr.base)␊
␉␉{␊
␉␉␉// Read new ramdisk image contents in kernel memory.␊
␉␉␉if (read(fh, (char*) ramdiskPtr.base, ramdiskPtr.size) == ramdiskPtr.size)␊
␉␉␉{␊
␉␉␉␉AllocateMemoryRange("RAMDisk", ramdiskPtr.base, ramdiskPtr.size, kBootDriverTypeInvalid);␊
␉␉␉␉Node* node = DT__FindNode("/chosen/memory-map", false);␊
␉␉␉␉if(node != NULL)␊
␉␉␉␉{␊
␉␉␉␉␉DT__AddProperty(node, "RAMDisk", sizeof(RAMDiskParam), (void*)&ramdiskPtr);␉␉␊
␉␉␉␉␉␊
␉␉␉␉}␊
␉␉␉␉else␊
␉␉␉␉{␊
␉␉␉␉␉verbose("Unable to notify Mac OS X of the ramdisk %s.\n", filename);␊
␉␉␉␉}␊
␉␉␉␉␊
␉␉␉}␊
␉␉␉else {␊
␉␉␉␉verbose("Unable to read md0 image %s.\n", filename);␊
␉␉␉}␊
␉␉␉␊
␉␉} else {␊
␉␉␉verbose("md0 image %s is empty.\n", filename);␊
␉␉}␊
␉␉␊
␉␉␊
␉␉close(fh);␊
␉␉␊
␉}␊
}␊
␊
␊
void umountRAMDisk()␊
{␊
if (gRAMDiskMI != NULL)␊

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Revision: 256