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96e5b03c8a
u-boot-brain/disk/part_iso.c
Simon Glass 96e5b03c8a dm: part: Convert partition API use to linker lists 
We can use linker lists instead of explicitly declaring each function.
This makes the code shorter by avoiding switch() statements and lots of
header file declarations.

While this does clean up the code it introduces a few code issues with SPL.
SPL never needs to print partition information since this all happens from
commands. SPL mostly doesn't need to obtain information about a partition
either, except in a few cases. Add these cases so that the code will be
dropped from each partition driver when not needed. This avoids code bloat.

I think this is still a win, since it is not a bad thing to be explicit
about which features are used in SPL. But others may like to weigh in.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
2016-03-14 15:34:50 -06:00

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/*
* (C) Copyright 2001
* Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include "part_iso.h"
#ifdef HAVE_BLOCK_DEVICE
/* #define ISO_PART_DEBUG */
#ifdef ISO_PART_DEBUG
#define PRINTF(fmt,args...) printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif
/* enable this if CDs are written with the PowerPC Platform ID */
#undef CHECK_FOR_POWERPC_PLATTFORM
#define CD_SECTSIZE 2048
static unsigned char tmpbuf[CD_SECTSIZE];
/* Convert char[4] in little endian format to the host format integer
*/
static inline unsigned long le32_to_int(unsigned char *le32)
{
return ((le32[3] << 24) +
(le32[2] << 16) +
(le32[1] << 8) +
le32[0]
);
}
/* Convert char[2] in little endian format to the host format integer
*/
static inline unsigned short le16_to_int(unsigned char *le16)
{
return ((le16[1] << 8) +
le16[0]
);
}
/* only boot records will be listed as valid partitions */
int get_partition_info_iso_verb(struct blk_desc *dev_desc, int part_num,
disk_partition_t *info, int verb)
{
int i,offset,entry_num;
unsigned short *chksumbuf;
unsigned short chksum;
unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
iso_boot_rec_t *pbr = (iso_boot_rec_t *)tmpbuf; /* boot record */
iso_pri_rec_t *ppr = (iso_pri_rec_t *)tmpbuf; /* primary desc */
iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf;
iso_init_def_entry_t *pide;
if (dev_desc->blksz != CD_SECTSIZE)
return -1;
/* the first sector (sector 0x10) must be a primary volume desc */
blkaddr=PVD_OFFSET;
if (dev_desc->block_read(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1)
return -1;
if(ppr->desctype!=0x01) {
if(verb)
printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
dev_desc->dev, part_num);
return (-1);
}
if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
if(verb)
printf ("** Wrong ISO Ident: %s on %d:%d **\n",
ppr->stand_ident,dev_desc->dev, part_num);
return (-1);
}
lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) +
((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) +
((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) +
((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ;
info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */
PRINTF(" Lastsect:%08lx\n",lastsect);
for(i=blkaddr;i<lastsect;i++) {
PRINTF("Reading block %d\n", i);
if (dev_desc->block_read(dev_desc, i, 1, (ulong *)tmpbuf) != 1)
return -1;
if(ppr->desctype==0x00)
break; /* boot entry found */
if(ppr->desctype==0xff) {
if(verb)
printf ("** No valid boot catalog found on %d:%d **\n",
dev_desc->dev, part_num);
return (-1);
}
}
/* boot entry found */
if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
if(verb)
printf ("** Wrong El Torito ident: %s on %d:%d **\n",
pbr->ident_str,dev_desc->dev, part_num);
return (-1);
}
bootaddr=le32_to_int(pbr->pointer);
PRINTF(" Boot Entry at: %08lX\n",bootaddr);
if (dev_desc->block_read(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) {
if(verb)
printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
bootaddr,dev_desc->dev, part_num);
return (-1);
}
chksum=0;
chksumbuf = (unsigned short *)tmpbuf;
for(i=0;i<0x10;i++)
chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8);
if(chksum!=0) {
if(verb)
printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n",
dev_desc->dev, part_num);
return (-1);
}
if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
if(verb)
printf ("** Key 0x55 0xAA error on %d:%d **\n",
dev_desc->dev, part_num);
return(-1);
}
#ifdef CHECK_FOR_POWERPC_PLATTFORM
if(pve->platform!=0x01) {
if(verb)
printf ("** No PowerPC platform CD on %d:%d **\n",
dev_desc->dev, part_num);
return(-1);
}
#endif
/* the validation entry seems to be ok, now search the "partition" */
entry_num=0;
offset=0x20;
strcpy((char *)info->type, "U-Boot");
switch(dev_desc->if_type) {
case IF_TYPE_IDE:
case IF_TYPE_SATA:
case IF_TYPE_ATAPI:
sprintf ((char *)info->name, "hd%c%d",
'a' + dev_desc->dev, part_num);
break;
case IF_TYPE_SCSI:
sprintf ((char *)info->name, "sd%c%d",
'a' + dev_desc->dev, part_num);
break;
case IF_TYPE_USB:
sprintf ((char *)info->name, "usbd%c%d",
'a' + dev_desc->dev, part_num);
break;
case IF_TYPE_DOC:
sprintf ((char *)info->name, "docd%c%d",
'a' + dev_desc->dev, part_num);
break;
default:
sprintf ((char *)info->name, "xx%c%d",
'a' + dev_desc->dev, part_num);
break;
}
/* the bootcatalog (including validation Entry) is limited to 2048Bytes
* (63 boot entries + validation entry) */
while(offset<2048) {
pide=(iso_init_def_entry_t *)&tmpbuf[offset];
if ((pide->boot_ind==0x88) ||
(pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
if(entry_num==part_num) { /* part found */
goto found;
}
entry_num++; /* count partitions Entries (boot and non bootables */
offset+=0x20;
continue;
}
if ((pide->boot_ind==0x90) || /* Section Header Entry */
(pide->boot_ind==0x91) || /* Section Header Entry (last) */
(pide->boot_ind==0x44)) { /* Extension Indicator */
offset+=0x20; /* skip unused entries */
}
else {
if(verb)
printf ("** Partition %d not found on device %d **\n",
part_num,dev_desc->dev);
return(-1);
}
}
/* if we reach this point entire sector has been
* searched w/o succsess */
if(verb)
printf ("** Partition %d not found on device %d **\n",
part_num,dev_desc->dev);
return(-1);
found:
if(pide->boot_ind!=0x88) {
if(verb)
printf ("** Partition %d is not bootable on device %d **\n",
part_num,dev_desc->dev);
return (-1);
}
switch(pide->boot_media) {
case 0x00: /* no emulation */
info->size=le16_to_int(pide->sec_cnt)>>2;
break;
case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */
case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */
case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */
case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */
default: info->size=0; break;
}
newblkaddr=le32_to_int(pide->rel_block_addr);
info->start=newblkaddr;
PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size);
return 0;
}
static int get_partition_info_iso(struct blk_desc *dev_desc, int part_num,
disk_partition_t *info)
{
return(get_partition_info_iso_verb(dev_desc, part_num, info, 1));
}
static void print_part_iso(struct blk_desc *dev_desc)
{
disk_partition_t info;
int i;
if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) {
printf("** No boot partition found on device %d **\n",dev_desc->dev);
return;
}
printf("Part Start Sect x Size Type\n");
i=0;
do {
printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n",
i, info.start, info.size, info.blksz, info.type);
i++;
} while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1);
}
static int test_part_iso(struct blk_desc *dev_desc)
{
disk_partition_t info;
return(get_partition_info_iso_verb(dev_desc,0,&info,0));
}
U_BOOT_PART_TYPE(iso) = {
.name = "ISO",
.part_type = PART_TYPE_ISO,
.get_info = get_partition_info_iso,
.print = print_part_iso,
.test = test_part_iso,
};
#endif
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