[OpenBIOS] Patch for auto partition selection
Programmingkid
programmingkidx at gmail.com
Fri Oct 26 23:42:18 CEST 2012
This patch implements the auto partition selection feature. It makes commands like these works: "dir cd:,\" and "boot cd:,\\:tbxi".
Any progress with the local variable patch?
---
packages/mac-parts.c | 180 ++++++++++++++++++++++++++++----------------------
1 files changed, 102 insertions(+), 78 deletions(-)
diff --git a/packages/mac-parts.c b/packages/mac-parts.c
index 18e4aa3..7e32423 100644
--- a/packages/mac-parts.c
+++ b/packages/mac-parts.c
@@ -34,7 +34,7 @@ do { printk("MAC-PARTS: " fmt , ##args); } while (0)
typedef struct {
xt_t seek_xt, read_xt;
ucell offs_hi, offs_lo;
- ucell size_hi, size_lo;
+ ucell size_hi, size_lo;
unsigned int blocksize;
phandle_t filesystem_ph;
} macparts_info_t;
@@ -58,15 +58,15 @@ macparts_open( macparts_info_t *di )
int want_bootcode = 0;
phandle_t ph;
ducell offs = 0, size = -1;
-
+
DPRINTF("macparts_open '%s'\n", str );
-
+
/*
- Arguments that we accept:
- id: [0-7]
- [(id)][,][filespec]
- */
-
+ Arguments that we accept:
+ id: [0-7]
+ [(id)][,][filespec]
+ */
+
if( str ) {
if ( !strlen(str) )
parnum = -1;
@@ -74,52 +74,52 @@ macparts_open( macparts_info_t *di )
/* Detect the boot parameters */
char *ptr;
ptr = str;
-
+
/* <id>,<file> */
if (*ptr >= '0' && *ptr <= '9' && *(ptr + 1) == ',') {
parstr = ptr;
*(ptr + 1) = '\0';
argstr = ptr + 2;
}
-
+
/* <id> */
else if (*ptr >= '0' && *ptr <='9' && *(ptr + 1) == '\0') {
parstr = ptr;
}
-
+
/* ,<file> */
else if (*ptr == ',') {
argstr = ptr + 1;
}
-
+
/* <file> */
else {
argstr = str;
}
-
+
/* Convert the id to a partition number */
if (strlen(parstr))
parnum = atol(parstr);
-
+
/* Detect if we are looking for the bootcode */
if (strcmp(argstr, "%BOOT") == 0)
want_bootcode = 1;
}
}
-
+
DPRINTF("parstr: %s argstr: %s parnum: %d\n", parstr, argstr, parnum);
-
+
DPRINTF("want_bootcode %d\n", want_bootcode);
DPRINTF("macparts_open %d\n", parnum);
-
+
di->filesystem_ph = 0;
di->read_xt = find_parent_method("read");
di->seek_xt = find_parent_method("seek");
-
+
SEEK( 0 );
if( READ(&dmap, sizeof(dmap)) != sizeof(dmap) )
goto out;
-
+
/* partition maps might support multiple block sizes; in this case,
* pmPyPartStart is typically given in terms of 512 byte blocks.
*/
@@ -133,121 +133,145 @@ macparts_open( macparts_info_t *di )
SEEK( bs );
if( READ(&par, sizeof(par)) != sizeof(par) )
goto out;
- if (__be16_to_cpu(par.pmSig) != DESC_PART_SIGNATURE)
+ if (__be16_to_cpu(par.pmSig) != DESC_PART_SIGNATURE)
goto out;
-
+
/*
* Implement partition selection as per the PowerPC Microprocessor CHRP bindings
*/
-
- if (str == NULL || parnum == 0) {
- /* According to the spec, partition 0 as well as no arguments means the whole disk */
+
+ if (parnum == 0) {
+ /* According to the spec, partition 0 means the whole disk */
offs = (long long)0;
size = (long long)__be32_to_cpu(dmap.sbBlkCount) * bs;
-
+
di->blocksize = (unsigned int)bs;
-
+
di->offs_hi = offs >> BITS;
di->offs_lo = offs & (ucell) -1;
-
+
di->size_hi = size >> BITS;
di->size_lo = size & (ucell) -1;
-
+
ret = -1;
goto out;
-
- } else if (parnum == -1 && strlen(argstr)) {
-
+
+ }
+
+ // if not partition, but a file was specified - example: boot cd:,\\:tbxi
+ else if (parnum == -1 && strlen(argstr))
+ {
DPRINTF("mac-parts: counted %d partitions\n", __be32_to_cpu(par.pmMapBlkCnt));
-
+
/* No partition was explicitly requested, but an argstr was passed in.
- So let's find a suitable partition... */
- for (parnum = 1; parnum <= __be32_to_cpu(par.pmMapBlkCnt); parnum++) {
+ So let's find a suitable partition... */
+ for (parnum = 1; parnum <= __be32_to_cpu(par.pmMapBlkCnt); parnum++)
+ {
SEEK( bs * parnum );
READ( &par, sizeof(par) );
- if( __be16_to_cpu(par.pmSig) != DESC_PART_SIGNATURE ||
- !__be32_to_cpu(par.pmPartBlkCnt) )
- break;
-
DPRINTF("found partition type: %s with status %x\n", par.pmPartType, __be32_to_cpu(par.pmPartStatus));
-
- /* If we have a valid, allocated and readable partition... */
- if( (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsValid) &&
- (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsAllocated) &&
- (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsReadable) ) {
+
+ // If an Apple_HFS or Apple_HFSX partition was found
+ if(strcmp(par.pmPartType, "Apple_HFS") == 0 || strcmp(par.pmPartType, "Apple_HFSX") == 0)
+ {
offs = (long long)__be32_to_cpu(par.pmPyPartStart) * bs;
size = (long long)__be32_to_cpu(par.pmPartBlkCnt) * bs;
-
+
/* If the filename was set to %BOOT, we actually want the bootcode */
- if (want_bootcode && (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsBootValid)) {
+ if (want_bootcode && (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsBootValid))
+ {
offs += (long long)__be32_to_cpu(par.pmLgBootStart) * bs;
size = (long long)__be32_to_cpu(par.pmBootSize);
-
+
goto found;
- } else {
+ }
+
+ else
+ {
/* Otherwise we were passed a filename and path. So let's
- choose the first partition with a valid filesystem */
+ choose the first partition with a valid filesystem */
DPUSH( offs );
PUSH_ih( my_parent() );
parword("find-filesystem");
-
+
ph = POP_ph();
if (ph)
goto found;
}
}
}
-
- } else {
+
+ }
+
+ // if no partition and no file was selected - example: "dir cd:,\"
+ else if (parnum == -1)
+ {
+ // search for the first partition of type Apple_HFS or Apple_HFSX
+ for(parnum = 1; parnum <= __be32_to_cpu(par.pmMapBlkCnt); parnum++)
+ {
+ SEEK( bs * parnum );
+ READ( &par, sizeof(par) );
+ DPRINTF("found partition type: %s with status %x\n", par.pmPartType, __be32_to_cpu(par.pmPartStatus));
+ if(strcmp(par.pmPartType, "Apple_HFS") == 0 || strcmp(par.pmPartType, "Apple_HFSX") == 0)
+ {
+ offs = (long long)__be32_to_cpu(par.pmPyPartStart) * bs;
+ size = (long long)__be32_to_cpu(par.pmPartBlkCnt) * bs;
+ goto found;
+ break;
+ }
+ }
+ }
+
+ else {
/* Another partition was explicitly requested */
SEEK( bs * parnum );
READ( &par, sizeof(par) );
-
+
if( (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsValid) &&
- (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsAllocated) &&
- (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsReadable) ) {
-
+ (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsAllocated) &&
+ (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsReadable) ) {
+
offs = (long long)__be32_to_cpu(par.pmPyPartStart) * bs;
size = (long long)__be32_to_cpu(par.pmPartBlkCnt) * bs;
}
}
-
+
/* If we couldn't find a partition, exit */
if (size == -1) {
DPRINTF("Unable to automatically find partition!\n");
goto out;
}
-
+
found:
-
+
ret = -1;
di->blocksize = (unsigned int)bs;
-
+
di->offs_hi = offs >> BITS;
di->offs_lo = offs & (ucell) -1;
-
+
di->size_hi = size >> BITS;
di->size_lo = size & (ucell) -1;
-
+
/* We have a valid partition - so probe for a filesystem at the current offset */
DPRINTF("mac-parts: about to probe for fs\n");
DPUSH( offs );
PUSH_ih( my_parent() );
parword("find-filesystem");
DPRINTF("mac-parts: done fs probe\n");
-
+
ph = POP_ph();
if( ph ) {
DPRINTF("mac-parts: filesystem found with ph " FMT_ucellx " and args %s\n", ph, argstr);
di->filesystem_ph = ph;
-
+
/* If the filename was %BOOT then it's not a real filename, so clear argstr before
- attempting interpose */
+ attempting interpose */
if (want_bootcode)
argstr = strdup("");
-
+
/* If we have been asked to open a particular file, interpose the filesystem package with
- the passed filename as an argument */
+ the passed filename as an argument */
if (strlen(argstr)) {
push_str( argstr );
PUSH_ph( ph );
@@ -256,9 +280,9 @@ found:
} else {
DPRINTF("mac-parts: no filesystem found; bypassing misc-files interpose\n");
}
-
+
free( str );
-
+
out:
PUSH( ret );
}
@@ -268,7 +292,7 @@ static void
macparts_probe( macparts_info_t *dummy )
{
desc_map_t *dmap = (desc_map_t*)cell2pointer(POP());
-
+
DPRINTF("macparts_probe %x ?= %x\n", dmap->sbSig, DESC_MAP_SIGNATURE);
if( __be16_to_cpu(dmap->sbSig) != DESC_MAP_SIGNATURE )
RET(0);
@@ -280,7 +304,7 @@ static void
macparts_get_info( macparts_info_t *di )
{
DPRINTF("macparts_get_info");
-
+
PUSH( -1 ); /* no type */
PUSH( di->offs_lo );
PUSH( di->offs_hi );
@@ -307,21 +331,21 @@ macparts_seek(macparts_info_t *di )
{
long long pos = DPOP();
long long offs, size;
-
+
DPRINTF("macparts_seek %llx:\n", pos);
-
+
/* Seek is invalid if we reach the end of the device */
size = ((ducell)di->size_hi << BITS) | di->size_lo;
if (pos > size)
RET( -1 );
-
+
/* Calculate the seek offset for the parent */
offs = ((ducell)di->offs_hi << BITS) | di->offs_lo;
offs += pos;
DPUSH(offs);
-
+
DPRINTF("macparts_seek parent offset %llx:\n", offs);
-
+
call_package(di->seek_xt, my_parent());
}
@@ -330,7 +354,7 @@ static void
macparts_read(macparts_info_t *di )
{
DPRINTF("macparts_read\n");
-
+
/* Pass the read back up to the parent */
call_package(di->read_xt, my_parent());
}
@@ -348,8 +372,8 @@ static void
macparts_dir( macparts_info_t *di )
{
/* On PPC Mac, the first partition chosen according to the CHRP boot
- specification (i.e. marked as bootable) may not necessarily contain
- a valid FS */
+ specification (i.e. marked as bootable) may not necessarily contain
+ a valid FS */
if ( di->filesystem_ph ) {
PUSH( my_self() );
push_str("dir");
--
1.7.5.4
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