57 {
58 grub_uint16_t *pos;
59 grub_uint16_t sum = 0;
60
61 for (pos = label;
62 pos < (label + sizeof (struct grub_sun_pc_block) / 2);
63 pos++)
64 sum ^= *pos;
65
66 return ! sum;
67 }
68
69 static grub_err_t
70 sun_pc_partition_map_iterate (grub_disk_t disk,
71 int (*hook) (grub_disk_t disk,
72 const grub_partition_t partition))
73 {
74 grub_partition_t p;
75 union
76 {
77 struct grub_sun_pc_block sun;
78 grub_uint16_t raw[0];
79 } block;
80 int partnum;
81 grub_err_t err;
82
83 p = (grub_partition_t) grub_zalloc (sizeof (struct grub_partition));
84 if (! p)
85 return grub_errno;
86
87 p->partmap = &grub_sun_pc_partition_map;
88 err = grub_disk_read (disk, 1, 0, sizeof (struct grub_sun_pc_block), &block);
89 if (err)
90 {
91 grub_free (p);
92 return err;
93 }
94
95 if (GRUB_PARTMAP_SUN_PC_MAGIC != grub_le_to_cpu16 (block.sun.magic))
96 {
97 grub_free (p);
98 return grub_error (GRUB_ERR_BAD_PART_TABLE,
99 "not a sun_pc partition table");
100 }
101
102 if (! grub_sun_is_valid (block.raw))
103 {
104 grub_free (p);
105 return grub_error (GRUB_ERR_BAD_PART_TABLE, "invalid checksum");
106 }
107
108 /* Maybe another error value would be better, because partition
109 table _is_ recognized but invalid. */
110 for (partnum = 0; partnum < GRUB_PARTMAP_SUN_PC_MAX_PARTS; partnum++)
111 {
112 struct grub_sun_pc_partition_descriptor *desc;
113
114 if (block.sun.partitions[partnum].id == 0
115 || block.sun.partitions[partnum].id
116 == GRUB_PARTMAP_SUN_PC_WHOLE_DISK_ID)
117 continue;
118
119 desc = &block.sun.partitions[partnum];
120 p->start = grub_le_to_cpu32 (desc->start_sector);
121 p->len = grub_le_to_cpu32 (desc->num_sectors);
122 p->number = partnum;
123 if (p->len)
124 {
125 if (hook (disk, p))
126 partnum = GRUB_PARTMAP_SUN_PC_MAX_PARTS;
127 }
128 }
129
130 grub_free (p);
131
132 return grub_errno;
133 }
134
135 /* Partition map type. */
136 static struct grub_partition_map grub_sun_pc_partition_map =
137 {
138 .name = "sunpc",
139 .iterate = sun_pc_partition_map_iterate,
|
57 {
58 grub_uint16_t *pos;
59 grub_uint16_t sum = 0;
60
61 for (pos = label;
62 pos < (label + sizeof (struct grub_sun_pc_block) / 2);
63 pos++)
64 sum ^= *pos;
65
66 return ! sum;
67 }
68
69 static grub_err_t
70 sun_pc_partition_map_iterate (grub_disk_t disk,
71 int (*hook) (grub_disk_t disk,
72 const grub_partition_t partition))
73 {
74 grub_partition_t p;
75 union
76 {
77 struct grub_sun_pc_block sunb;
78 grub_uint16_t raw[0];
79 } block;
80 int partnum;
81 grub_err_t err;
82
83 p = (grub_partition_t) grub_zalloc (sizeof (struct grub_partition));
84 if (! p)
85 return grub_errno;
86
87 p->partmap = &grub_sun_pc_partition_map;
88 err = grub_disk_read (disk, 1, 0, sizeof (struct grub_sun_pc_block), &block);
89 if (err)
90 {
91 grub_free (p);
92 return err;
93 }
94
95 if (GRUB_PARTMAP_SUN_PC_MAGIC != grub_le_to_cpu16 (block.sunb.magic))
96 {
97 grub_free (p);
98 return grub_error (GRUB_ERR_BAD_PART_TABLE,
99 "not a sun_pc partition table");
100 }
101
102 if (! grub_sun_is_valid (block.raw))
103 {
104 grub_free (p);
105 return grub_error (GRUB_ERR_BAD_PART_TABLE, "invalid checksum");
106 }
107
108 /* Maybe another error value would be better, because partition
109 table _is_ recognized but invalid. */
110 for (partnum = 0; partnum < GRUB_PARTMAP_SUN_PC_MAX_PARTS; partnum++)
111 {
112 struct grub_sun_pc_partition_descriptor *desc;
113
114 if (block.sunb.partitions[partnum].id == 0
115 || block.sunb.partitions[partnum].id
116 == GRUB_PARTMAP_SUN_PC_WHOLE_DISK_ID)
117 continue;
118
119 desc = &block.sunb.partitions[partnum];
120 p->start = grub_le_to_cpu32 (desc->start_sector);
121 p->len = grub_le_to_cpu32 (desc->num_sectors);
122 p->number = partnum;
123 if (p->len)
124 {
125 if (hook (disk, p))
126 partnum = GRUB_PARTMAP_SUN_PC_MAX_PARTS;
127 }
128 }
129
130 grub_free (p);
131
132 return grub_errno;
133 }
134
135 /* Partition map type. */
136 static struct grub_partition_map grub_sun_pc_partition_map =
137 {
138 .name = "sunpc",
139 .iterate = sun_pc_partition_map_iterate,
|