--- /dev/null
+/*
+ * Creation Date: <2003/12/04 17:07:05 samuel>
+ * Time-stamp: <2004/01/07 19:36:09 samuel>
+ *
+ * <mac-parts.c>
+ *
+ * macintosh partition support
+ *
+ * Copyright (C) 2003, 2004 Samuel Rydh (samuel@ibrium.se)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2
+ *
+ */
+
+#include "config.h"
+#include "libopenbios/bindings.h"
+#include "libopenbios/load.h"
+#include "mac-parts.h"
+#include "libc/byteorder.h"
+#include "libc/vsprintf.h"
+#include "packages.h"
+
+//#define CONFIG_DEBUG_MAC_PARTS
+
+#ifdef CONFIG_DEBUG_MAC_PARTS
+#define DPRINTF(fmt, args...) \
+do { printk("MAC-PARTS: " fmt , ##args); } while (0)
+#else
+#define DPRINTF(fmt, args...) do {} while(0)
+#endif
+
+typedef struct {
+ xt_t seek_xt, read_xt;
+ ucell offs_hi, offs_lo;
+ ucell size_hi, size_lo;
+ ucell bootcode_addr, bootcode_entry;
+ unsigned int blocksize;
+ phandle_t filesystem_ph;
+} macparts_info_t;
+
+DECLARE_NODE( macparts, INSTALL_OPEN, sizeof(macparts_info_t), "+/packages/mac-parts" );
+
+#define SEEK( pos ) ({ DPUSH(pos); call_parent(di->seek_xt); POP(); })
+#define READ( buf, size ) ({ PUSH(pointer2cell(buf)); PUSH(size); call_parent(di->read_xt); POP(); })
+
+/* ( open -- flag ) */
+static void
+macparts_open( macparts_info_t *di )
+{
+ char *str = my_args_copy();
+ char *parstr = NULL, *argstr = NULL;
+ char *tmpstr;
+ int bs, parnum=-1, apple_parnum=-1;
+ int parlist[2], parlist_size = 0;
+ desc_map_t dmap;
+ part_entry_t par;
+ int ret = 0, i = 0, j = 0;
+ 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]
+ */
+
+ if ( str && strlen(str) ) {
+ /* Detect the arguments */
+ if ((*str >= '0' && *str <= '9') || (*str == ',')) {
+ push_str(str);
+ PUSH(',');
+ fword("left-parse-string");
+ parstr = pop_fstr_copy();
+ argstr = pop_fstr_copy();
+ } else {
+ argstr = str;
+ }
+
+ /* Make sure argstr is not null */
+ if (argstr == NULL)
+ argstr = strdup("");
+
+ /* Convert the id to a partition number */
+ if (parstr && 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.
+ */
+ bs = __be16_to_cpu(dmap.sbBlockSize);
+ if( bs != 512 ) {
+ SEEK( 512 );
+ READ( &par, sizeof(par) );
+ if( __be16_to_cpu(par.pmSig) == DESC_PART_SIGNATURE )
+ bs = 512;
+ }
+ SEEK( bs );
+ if( READ(&par, sizeof(par)) != sizeof(par) )
+ goto out;
+ if (__be16_to_cpu(par.pmSig) != DESC_PART_SIGNATURE)
+ goto out;
+
+ /*
+ * Implement partition selection as per the PowerPC Microprocessor CHRP bindings
+ */
+
+ if (argstr == NULL || parnum == 0) {
+ /* According to the spec, partition 0 as well as no arguments 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) {
+
+ DPRINTF("mac-parts: counted %d partitions\n", __be32_to_cpu(par.pmMapBlkCnt));
+
+ /* No partition was explicitly requested so let's find a suitable partition... */
+ for (i = 1; i <= __be32_to_cpu(par.pmMapBlkCnt); i++) {
+ SEEK( bs * i );
+ READ( &par, sizeof(par) );
+ if ( __be16_to_cpu(par.pmSig) != DESC_PART_SIGNATURE ||
+ !__be32_to_cpu(par.pmPartBlkCnt) )
+ continue;
+
+ DPRINTF("found partition %d type: %s with status %x\n", i, 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) ) {
+
+ /* Unfortunately Apple's OF implementation doesn't follow the OF PowerPC CHRP bindings
+ * and instead will brute-force boot the first valid partition it finds with a
+ * type of either "Apple_Boot", "Apple_HFS" or "DOS_FAT_". Here we store the id
+ * of the first partition that matches these criteria to use as a fallback later
+ * if required. */
+
+ if (apple_parnum == -1 &&
+ (strcmp(par.pmPartType, "Apple_Boot") == 0 ||
+ strcmp(par.pmPartType, "Apple_Bootstrap") == 0 ||
+ strcmp(par.pmPartType, "Apple_HFS") == 0 ||
+ strcmp(par.pmPartType, "DOS_FAT_") == 0)) {
+ apple_parnum = i;
+
+ DPRINTF("Located Apple OF fallback partition %d\n", apple_parnum);
+ }
+
+ /* If the partition is also bootable and the pmProcessor field matches "PowerPC" (insensitive
+ * match), then according to the CHRP bindings this is our chosen partition */
+ for (j = 0; j < strlen(par.pmProcessor); j++) {
+ par.pmProcessor[j] = tolower(par.pmProcessor[j]);
+ }
+
+ if ((__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsBootValid) &&
+ strcmp(par.pmProcessor, "powerpc") == 0) {
+ parnum = i;
+
+ DPRINTF("Located CHRP-compliant boot partition %d\n", parnum);
+ }
+ }
+ }
+
+ /* If we found a valid CHRP partition, add it to the list */
+ if (parnum > 0) {
+ parlist[parlist_size++] = parnum;
+ }
+
+ /* If we found an Apple OF fallback partition, add it to the list */
+ if (apple_parnum > 0 && apple_parnum != parnum) {
+ parlist[parlist_size++] = apple_parnum;
+ }
+
+ } else {
+ /* Another partition was explicitly requested */
+ parlist[parlist_size++] = parnum;
+
+ DPRINTF("Partition %d explicitly requested\n", parnum);
+ }
+
+ /* Attempt to use our CHRP partition, optionally followed by our Apple OF fallback partition */
+ for (j = 0; j < parlist_size; j++) {
+
+ /* Make sure our partition is valid */
+ parnum = parlist[j];
+
+ DPRINTF("Selected partition %d\n", parnum);
+
+ 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)) ) {
+ DPRINTF("Partition %d is not valid, allocated and readable\n", parnum);
+ goto out;
+ }
+
+ ret = -1;
+
+ offs = (long long)__be32_to_cpu(par.pmPyPartStart) * bs;
+ size = (long long)__be32_to_cpu(par.pmPartBlkCnt) * bs;
+
+ if (want_bootcode) {
+
+ /* If size == 0 then fail because we requested bootcode but it doesn't exist */
+ size = (long long)__be32_to_cpu(par.pmBootSize);
+ if (!size) {
+ ret = 0;
+ goto out;
+ }
+
+ /* Adjust seek position so 0 = start of bootcode */
+ offs += (long long)__be32_to_cpu(par.pmLgBootStart) * bs;
+
+ di->bootcode_addr = __be32_to_cpu(par.pmBootLoad);
+ di->bootcode_entry = __be32_to_cpu(par.pmBootEntry);
+ }
+
+ 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;
+
+ /* If we're trying to execute bootcode then we're all done */
+ if (want_bootcode) {
+ goto out;
+ }
+
+ /* 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 on partition %d with ph " FMT_ucellx " and args %s\n", parnum, ph, argstr);
+ di->filesystem_ph = ph;
+
+ /* In case no partition was specified, set a special selected-partition-args property
+ giving the device parameters that we can use to generate bootpath */
+ tmpstr = malloc(strlen(argstr) + 2 + 1);
+ if (strlen(argstr)) {
+ sprintf(tmpstr, "%d,%s", parnum, argstr);
+ } else {
+ sprintf(tmpstr, "%d", parnum);
+ }
+
+ push_str(tmpstr);
+ feval("strdup encode-string \" selected-partition-args\" property");
+
+ free(tmpstr);
+
+ /* If we have been asked to open a particular file, interpose the filesystem package with
+ the passed filename as an argument */
+ if (strlen(argstr)) {
+ push_str( argstr );
+ PUSH_ph( ph );
+ fword("interpose");
+ }
+
+ goto out;
+ } else {
+ DPRINTF("mac-parts: no filesystem found on partition %d; bypassing misc-files interpose\n", parnum);
+
+ /* Here we have a valid partition; however if we tried to pass in a file argument for a
+ partition that doesn't contain a filesystem, then we must fail */
+ if (strlen(argstr)) {
+ ret = 0;
+ }
+ }
+ }
+
+ free( str );
+
+out:
+ PUSH( ret );
+}
+
+/* ( block0 -- flag? ) */
+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);
+ RET(-1);
+}
+
+/* ( -- type offset.d size.d ) */
+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 );
+ PUSH( di->size_lo );
+ PUSH( di->size_hi );
+}
+
+/* ( -- size entry addr ) */
+static void
+macparts_get_bootcode_info( macparts_info_t *di )
+{
+ DPRINTF("macparts_get_bootcode_info");
+
+ PUSH( di->size_lo );
+ PUSH( di->bootcode_entry );
+ PUSH( di->bootcode_addr );
+}
+
+static void
+macparts_block_size( macparts_info_t *di )
+{
+ DPRINTF("macparts_block_size = %x\n", di->blocksize);
+ PUSH(di->blocksize);
+}
+
+static void
+macparts_initialize( macparts_info_t *di )
+{
+ fword("register-partition-package");
+}
+
+/* ( pos.d -- status ) */
+static void
+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());
+}
+
+/* ( buf len -- actlen ) */
+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());
+}
+
+/* ( addr -- size ) */
+static void
+macparts_load( __attribute__((unused))macparts_info_t *di )
+{
+ /* Invoke the loader */
+ load(my_self());
+}
+
+/* ( pathstr len -- ) */
+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 */
+ if ( di->filesystem_ph ) {
+ PUSH( my_self() );
+ push_str("dir");
+ PUSH( di->filesystem_ph );
+ fword("find-method");
+ POP();
+ fword("execute");
+ } else {
+ forth_printf("mac-parts: Unable to determine filesystem\n");
+ POP();
+ POP();
+ }
+}
+
+NODE_METHODS( macparts ) = {
+ { "probe", macparts_probe },
+ { "open", macparts_open },
+ { "seek", macparts_seek },
+ { "read", macparts_read },
+ { "load", macparts_load },
+ { "dir", macparts_dir },
+ { "get-info", macparts_get_info },
+ { "get-bootcode-info", macparts_get_bootcode_info },
+ { "block-size", macparts_block_size },
+ { NULL, macparts_initialize },
+};
+
+void
+macparts_init( void )
+{
+ REGISTER_NODE( macparts );
+}
Code Review / kvmfornfv.git / blobdiff