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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
390 lines
8.8 KiB
C
390 lines
8.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2001
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* Hans-Joerg Frieden, Hyperion Entertainment
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* Hans-JoergF@hyperion-entertainment.com
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*/
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#include <common.h>
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#include <command.h>
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#include <ide.h>
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#include "part_amiga.h"
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#ifdef CONFIG_HAVE_BLOCK_DEVICE
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#undef AMIGA_DEBUG
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#ifdef AMIGA_DEBUG
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#define PRINTF(fmt, args...) printf(fmt ,##args)
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#else
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#define PRINTF(fmt, args...)
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#endif
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struct block_header
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{
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u32 id;
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u32 summed_longs;
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s32 chk_sum;
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};
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static unsigned char block_buffer[DEFAULT_SECTOR_SIZE];
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static struct rigid_disk_block rdb = {0};
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static struct bootcode_block bootcode = {0};
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/*
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* Copy a bcpl to a c string
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*/
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static void bcpl_strcpy(char *to, char *from)
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{
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int len = *from++;
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while (len)
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{
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*to++ = *from++;
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len--;
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}
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*to = 0;
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}
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/*
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* Print a BCPL String. BCPL strings start with a byte with the length
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* of the string, and don't contain a terminating nul character
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*/
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static void bstr_print(char *string)
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{
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int len = *string++;
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char buffer[256];
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int i;
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i = 0;
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while (len)
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{
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buffer[i++] = *string++;
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len--;
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}
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buffer[i] = 0;
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printf("%-10s", buffer);
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}
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/*
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* Sum a block. The checksum of a block must end up at zero
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* to be valid. The chk_sum field is selected so that adding
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* it yields zero.
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*/
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int sum_block(struct block_header *header)
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{
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s32 *block = (s32 *)header;
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u32 i;
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s32 sum = 0;
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for (i = 0; i < header->summed_longs; i++)
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sum += *block++;
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return (sum != 0);
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}
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/*
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* Print an AmigaOS disk type. Disk types are a four-byte identifier
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* describing the file system. They are usually written as a three-letter
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* word followed by a backslash and a version number. For example,
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* DOS\0 would be the original file system. SFS\0 would be SmartFileSystem.
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* DOS\1 is FFS.
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*/
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static void print_disk_type(u32 disk_type)
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{
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char buffer[6];
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buffer[0] = (disk_type & 0xFF000000)>>24;
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buffer[1] = (disk_type & 0x00FF0000)>>16;
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buffer[2] = (disk_type & 0x0000FF00)>>8;
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buffer[3] = '\\';
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buffer[4] = (disk_type & 0x000000FF) + '0';
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buffer[5] = 0;
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printf("%s", buffer);
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}
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/*
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* Print the info contained within the given partition block
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*/
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static void print_part_info(struct partition_block *p)
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{
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struct amiga_part_geometry *g;
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g = (struct amiga_part_geometry *)&(p->environment);
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bstr_print(p->drive_name);
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printf("%6d\t%6d\t",
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g->low_cyl * g->block_per_track * g->surfaces ,
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(g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1);
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print_disk_type(g->dos_type);
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printf("\t%5d\n", g->boot_priority);
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}
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/*
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* Search for the Rigid Disk Block. The rigid disk block is required
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* to be within the first 16 blocks of a drive, needs to have
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* the ID AMIGA_ID_RDISK ('RDSK') and needs to have a valid
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* sum-to-zero checksum
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*/
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struct rigid_disk_block *get_rdisk(struct blk_desc *dev_desc)
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{
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int i;
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int limit;
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char *s;
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s = env_get("amiga_scanlimit");
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if (s)
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limit = simple_strtoul(s, NULL, 10);
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else
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limit = AMIGA_BLOCK_LIMIT;
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for (i=0; i<limit; i++)
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{
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ulong res = blk_dread(dev_desc, i, 1, (ulong *)block_buffer);
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if (res == 1)
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{
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struct rigid_disk_block *trdb = (struct rigid_disk_block *)block_buffer;
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if (trdb->id == AMIGA_ID_RDISK)
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{
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PRINTF("Rigid disk block suspect at %d, checking checksum\n",i);
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if (sum_block((struct block_header *)block_buffer) == 0)
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{
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PRINTF("FOUND\n");
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memcpy(&rdb, trdb, sizeof(struct rigid_disk_block));
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return (struct rigid_disk_block *)&rdb;
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}
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}
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}
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}
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PRINTF("Done scanning, no RDB found\n");
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return NULL;
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}
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/*
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* Search for boot code
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* Again, the first boot block must be located somewhere in the first 16 blocks, or rooted in the
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* Ridgid disk block
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*/
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struct bootcode_block *get_bootcode(struct blk_desc *dev_desc)
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{
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int i;
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int limit;
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char *s;
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s = env_get("amiga_scanlimit");
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if (s)
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limit = simple_strtoul(s, NULL, 10);
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else
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limit = AMIGA_BLOCK_LIMIT;
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PRINTF("Scanning for BOOT from 0 to %d\n", limit);
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for (i = 0; i < limit; i++)
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{
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ulong res = blk_dread(dev_desc, i, 1, (ulong *)block_buffer);
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if (res == 1)
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{
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struct bootcode_block *boot = (struct bootcode_block *)block_buffer;
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if (boot->id == AMIGA_ID_BOOT)
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{
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PRINTF("BOOT block at %d, checking checksum\n", i);
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if (sum_block((struct block_header *)block_buffer) == 0)
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{
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PRINTF("Found valid bootcode block\n");
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memcpy(&bootcode, boot, sizeof(struct bootcode_block));
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return &bootcode;
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}
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}
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}
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}
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PRINTF("No boot code found on disk\n");
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return 0;
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}
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/*
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* Test if the given partition has an Amiga partition table/Rigid
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* Disk block
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*/
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static int part_test_amiga(struct blk_desc *dev_desc)
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{
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struct rigid_disk_block *rdb;
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struct bootcode_block *bootcode;
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PRINTF("part_test_amiga: Testing for an Amiga RDB partition\n");
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rdb = get_rdisk(dev_desc);
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if (rdb)
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{
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bootcode = get_bootcode(dev_desc);
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if (bootcode)
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PRINTF("part_test_amiga: bootable Amiga disk\n");
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else
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PRINTF("part_test_amiga: non-bootable Amiga disk\n");
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return 0;
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}
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else
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{
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PRINTF("part_test_amiga: no RDB found\n");
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return -1;
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}
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}
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/*
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* Find partition number partnum on the given drive.
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*/
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static struct partition_block *find_partition(struct blk_desc *dev_desc,
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int partnum)
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{
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struct rigid_disk_block *rdb;
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struct partition_block *p;
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u32 block;
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PRINTF("Trying to find partition block %d\n", partnum);
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rdb = get_rdisk(dev_desc);
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if (!rdb)
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{
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PRINTF("find_partition: no rdb found\n");
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return NULL;
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}
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PRINTF("find_partition: Scanning partition list\n");
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block = rdb->partition_list;
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PRINTF("find_partition: partition list at 0x%x\n", block);
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while (block != 0xFFFFFFFF)
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{
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ulong res = blk_dread(dev_desc, block, 1, (ulong *)block_buffer);
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if (res == 1)
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{
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p = (struct partition_block *)block_buffer;
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if (p->id == AMIGA_ID_PART)
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{
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PRINTF("PART block suspect at 0x%x, checking checksum\n",block);
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if (sum_block((struct block_header *)p) == 0)
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{
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if (partnum == 0) break;
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else
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{
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partnum--;
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block = p->next;
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}
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}
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} else block = 0xFFFFFFFF;
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} else block = 0xFFFFFFFF;
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}
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if (block == 0xFFFFFFFF)
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{
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PRINTF("PART block not found\n");
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return NULL;
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}
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return (struct partition_block *)block_buffer;
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}
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/*
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* Get info about a partition
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*/
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static int part_get_info_amiga(struct blk_desc *dev_desc, int part,
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disk_partition_t *info)
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{
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struct partition_block *p = find_partition(dev_desc, part-1);
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struct amiga_part_geometry *g;
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u32 disk_type;
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if (!p) return -1;
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g = (struct amiga_part_geometry *)&(p->environment);
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info->start = g->low_cyl * g->block_per_track * g->surfaces;
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info->size = (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1;
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info->blksz = rdb.block_bytes;
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bcpl_strcpy((char *)info->name, p->drive_name);
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disk_type = g->dos_type;
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info->type[0] = (disk_type & 0xFF000000)>>24;
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info->type[1] = (disk_type & 0x00FF0000)>>16;
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info->type[2] = (disk_type & 0x0000FF00)>>8;
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info->type[3] = '\\';
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info->type[4] = (disk_type & 0x000000FF) + '0';
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info->type[5] = 0;
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return 0;
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}
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static void part_print_amiga(struct blk_desc *dev_desc)
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{
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struct rigid_disk_block *rdb;
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struct bootcode_block *boot;
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struct partition_block *p;
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u32 block;
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int i = 1;
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rdb = get_rdisk(dev_desc);
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if (!rdb)
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{
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PRINTF("part_print_amiga: no rdb found\n");
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return;
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}
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PRINTF("part_print_amiga: Scanning partition list\n");
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block = rdb->partition_list;
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PRINTF("part_print_amiga: partition list at 0x%x\n", block);
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printf("Summary: DiskBlockSize: %d\n"
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" Cylinders : %d\n"
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" Sectors/Track: %d\n"
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" Heads : %d\n\n",
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rdb->block_bytes, rdb->cylinders, rdb->sectors,
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rdb->heads);
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printf(" First Num. \n"
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"Nr. Part. Name Block Block Type Boot Priority\n");
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while (block != 0xFFFFFFFF)
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{
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ulong res;
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PRINTF("Trying to load block #0x%X\n", block);
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res = blk_dread(dev_desc, block, 1, (ulong *)block_buffer);
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if (res == 1)
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{
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p = (struct partition_block *)block_buffer;
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if (p->id == AMIGA_ID_PART)
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{
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PRINTF("PART block suspect at 0x%x, checking checksum\n",block);
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if (sum_block((struct block_header *)p) == 0)
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{
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printf("%-4d ", i); i++;
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print_part_info(p);
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block = p->next;
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}
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} else block = 0xFFFFFFFF;
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} else block = 0xFFFFFFFF;
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}
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boot = get_bootcode(dev_desc);
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if (boot)
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{
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printf("Disk is bootable\n");
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}
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}
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U_BOOT_PART_TYPE(amiga) = {
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.name = "AMIGA",
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.part_type = PART_TYPE_AMIGA,
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.max_entries = AMIGA_ENTRY_NUMBERS,
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.get_info = part_get_info_amiga,
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.print = part_print_amiga,
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.test = part_test_amiga,
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};
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#endif
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