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1/*
2 * idprom.c: Routines to load the idprom into kernel addresses and
3 * interpret the data contained within.
4 *
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 */
7
8#include <linux/kernel.h>
9#include <linux/types.h>
10#include <linux/init.h>
11#include <linux/export.h>
12
13#include <asm/oplib.h>
14#include <asm/idprom.h>
15
16struct idprom *idprom;
17EXPORT_SYMBOL(idprom);
18
19static struct idprom idprom_buffer;
20
21#ifdef CONFIG_SPARC32
22#include <asm/machines.h> /* Fun with Sun released architectures. */
23
24/* Here is the master table of Sun machines which use some implementation
25 * of the Sparc CPU and have a meaningful IDPROM machtype value that we
26 * know about. See asm-sparc/machines.h for empirical constants.
27 */
28static struct Sun_Machine_Models Sun_Machines[] = {
29/* First, Leon */
30{ .name = "Leon3 System-on-a-Chip", .id_machtype = (M_LEON | M_LEON3_SOC) },
31/* Finally, early Sun4m's */
32{ .name = "Sun4m SparcSystem600", .id_machtype = (SM_SUN4M | SM_4M_SS60) },
33{ .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) },
34{ .name = "Sun4m SparcStation5", .id_machtype = (SM_SUN4M | SM_4M_SS40) },
35/* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */
36{ .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) } };
37
38static void __init display_system_type(unsigned char machtype)
39{
40 char sysname[128];
41 register int i;
42
43 for (i = 0; i < ARRAY_SIZE(Sun_Machines); i++) {
44 if (Sun_Machines[i].id_machtype == machtype) {
45 if (machtype != (SM_SUN4M_OBP | 0x00) ||
46 prom_getproperty(prom_root_node, "banner-name",
47 sysname, sizeof(sysname)) <= 0)
48 printk(KERN_WARNING "TYPE: %s\n",
49 Sun_Machines[i].name);
50 else
51 printk(KERN_WARNING "TYPE: %s\n", sysname);
52 return;
53 }
54 }
55
56 prom_printf("IDPROM: Warning, bogus id_machtype value, 0x%x\n", machtype);
57}
58#else
59static void __init display_system_type(unsigned char machtype)
60{
61}
62#endif
63/* Calculate the IDPROM checksum (xor of the data bytes). */
64static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
65{
66 unsigned char cksum, i, *ptr = (unsigned char *)idprom;
67
68 for (i = cksum = 0; i <= 0x0E; i++)
69 cksum ^= *ptr++;
70
71 return cksum;
72}
73
74/* Create a local IDPROM copy, verify integrity, and display information. */
75void __init idprom_init(void)
76{
77 prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
78
79 idprom = &idprom_buffer;
80
81 if (idprom->id_format != 0x01)
82 prom_printf("IDPROM: Warning, unknown format type!\n");
83
84 if (idprom->id_cksum != calc_idprom_cksum(idprom))
85 prom_printf("IDPROM: Warning, checksum failure (nvram=%x, calc=%x)!\n",
86 idprom->id_cksum, calc_idprom_cksum(idprom));
87
88 display_system_type(idprom->id_machtype);
89
90 printk(KERN_WARNING "Ethernet address: %pM\n", idprom->id_ethaddr);
91}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * idprom.c: Routines to load the idprom into kernel addresses and
4 * interpret the data contained within.
5 *
6 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
7 */
8
9#include <linux/kernel.h>
10#include <linux/types.h>
11#include <linux/init.h>
12#include <linux/export.h>
13#include <linux/etherdevice.h>
14
15#include <asm/oplib.h>
16#include <asm/idprom.h>
17
18struct idprom *idprom;
19EXPORT_SYMBOL(idprom);
20
21static struct idprom idprom_buffer;
22
23#ifdef CONFIG_SPARC32
24#include <asm/machines.h> /* Fun with Sun released architectures. */
25
26/* Here is the master table of Sun machines which use some implementation
27 * of the Sparc CPU and have a meaningful IDPROM machtype value that we
28 * know about. See asm-sparc/machines.h for empirical constants.
29 */
30static struct Sun_Machine_Models Sun_Machines[] = {
31/* First, Leon */
32{ .name = "Leon3 System-on-a-Chip", .id_machtype = (M_LEON | M_LEON3_SOC) },
33/* Finally, early Sun4m's */
34{ .name = "Sun4m SparcSystem600", .id_machtype = (SM_SUN4M | SM_4M_SS60) },
35{ .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) },
36{ .name = "Sun4m SparcStation5", .id_machtype = (SM_SUN4M | SM_4M_SS40) },
37/* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */
38{ .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) } };
39
40static void __init display_system_type(unsigned char machtype)
41{
42 char sysname[128];
43 register int i;
44
45 for (i = 0; i < ARRAY_SIZE(Sun_Machines); i++) {
46 if (Sun_Machines[i].id_machtype == machtype) {
47 if (machtype != (SM_SUN4M_OBP | 0x00) ||
48 prom_getproperty(prom_root_node, "banner-name",
49 sysname, sizeof(sysname)) <= 0)
50 printk(KERN_WARNING "TYPE: %s\n",
51 Sun_Machines[i].name);
52 else
53 printk(KERN_WARNING "TYPE: %s\n", sysname);
54 return;
55 }
56 }
57
58 prom_printf("IDPROM: Warning, bogus id_machtype value, 0x%x\n", machtype);
59}
60#else
61static void __init display_system_type(unsigned char machtype)
62{
63}
64#endif
65
66unsigned char *arch_get_platform_mac_address(void)
67{
68 return idprom->id_ethaddr;
69}
70
71/* Calculate the IDPROM checksum (xor of the data bytes). */
72static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
73{
74 unsigned char cksum, i, *ptr = (unsigned char *)idprom;
75
76 for (i = cksum = 0; i <= 0x0E; i++)
77 cksum ^= *ptr++;
78
79 return cksum;
80}
81
82/* Create a local IDPROM copy, verify integrity, and display information. */
83void __init idprom_init(void)
84{
85 prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
86
87 idprom = &idprom_buffer;
88
89 if (idprom->id_format != 0x01)
90 prom_printf("IDPROM: Warning, unknown format type!\n");
91
92 if (idprom->id_cksum != calc_idprom_cksum(idprom))
93 prom_printf("IDPROM: Warning, checksum failure (nvram=%x, calc=%x)!\n",
94 idprom->id_cksum, calc_idprom_cksum(idprom));
95
96 display_system_type(idprom->id_machtype);
97
98 printk(KERN_WARNING "Ethernet address: %pM\n", idprom->id_ethaddr);
99}