1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 /* 2 /*
3 * idprom.c: Routines to load the idprom into 3 * idprom.c: Routines to load the idprom into kernel addresses and
4 * interpret the data contained with 4 * interpret the data contained within.
5 * 5 *
6 * Copyright (C) 1995 David S. Miller (davem@c 6 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
7 */ 7 */
8 8
9 #include <linux/kernel.h> 9 #include <linux/kernel.h>
10 #include <linux/types.h> 10 #include <linux/types.h>
11 #include <linux/init.h> 11 #include <linux/init.h>
12 #include <linux/export.h> 12 #include <linux/export.h>
13 #include <linux/etherdevice.h> 13 #include <linux/etherdevice.h>
14 14
15 #include <asm/oplib.h> 15 #include <asm/oplib.h>
16 #include <asm/idprom.h> 16 #include <asm/idprom.h>
17 17
18 struct idprom *idprom; 18 struct idprom *idprom;
19 EXPORT_SYMBOL(idprom); 19 EXPORT_SYMBOL(idprom);
20 20
21 static struct idprom idprom_buffer; 21 static struct idprom idprom_buffer;
22 22
23 #ifdef CONFIG_SPARC32 23 #ifdef CONFIG_SPARC32
24 #include <asm/machines.h> /* Fun with Sun rel 24 #include <asm/machines.h> /* Fun with Sun released architectures. */
25 25
26 /* Here is the master table of Sun machines wh 26 /* Here is the master table of Sun machines which use some implementation
27 * of the Sparc CPU and have a meaningful IDPR 27 * of the Sparc CPU and have a meaningful IDPROM machtype value that we
28 * know about. See asm-sparc/machines.h for e 28 * know about. See asm-sparc/machines.h for empirical constants.
29 */ 29 */
30 static struct Sun_Machine_Models Sun_Machines[ 30 static struct Sun_Machine_Models Sun_Machines[] = {
31 /* First, Leon */ 31 /* First, Leon */
32 { .name = "Leon3 System-on-a-Chip", .id_macht 32 { .name = "Leon3 System-on-a-Chip", .id_machtype = (M_LEON | M_LEON3_SOC) },
33 /* Finally, early Sun4m's */ 33 /* Finally, early Sun4m's */
34 { .name = "Sun4m SparcSystem600", .id_macht 34 { .name = "Sun4m SparcSystem600", .id_machtype = (SM_SUN4M | SM_4M_SS60) },
35 { .name = "Sun4m SparcStation10/20", .id_macht 35 { .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) },
36 { .name = "Sun4m SparcStation5", .id_macht 36 { .name = "Sun4m SparcStation5", .id_machtype = (SM_SUN4M | SM_4M_SS40) },
37 /* One entry for the OBP arch's which are sun4 37 /* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */
38 { .name = "Sun4M OBP based system", .id_macht 38 { .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) } };
39 39
40 static void __init display_system_type(unsigne 40 static void __init display_system_type(unsigned char machtype)
41 { 41 {
42 char sysname[128]; 42 char sysname[128];
43 register int i; 43 register int i;
44 44
45 for (i = 0; i < ARRAY_SIZE(Sun_Machine 45 for (i = 0; i < ARRAY_SIZE(Sun_Machines); i++) {
46 if (Sun_Machines[i].id_machtyp 46 if (Sun_Machines[i].id_machtype == machtype) {
47 if (machtype != (SM_SU 47 if (machtype != (SM_SUN4M_OBP | 0x00) ||
48 prom_getproperty(p 48 prom_getproperty(prom_root_node, "banner-name",
49 s 49 sysname, sizeof(sysname)) <= 0)
50 printk(KERN_WA 50 printk(KERN_WARNING "TYPE: %s\n",
51 Sun_Mac 51 Sun_Machines[i].name);
52 else 52 else
53 printk(KERN_WA 53 printk(KERN_WARNING "TYPE: %s\n", sysname);
54 return; 54 return;
55 } 55 }
56 } 56 }
57 57
58 prom_printf("IDPROM: Warning, bogus id 58 prom_printf("IDPROM: Warning, bogus id_machtype value, 0x%x\n", machtype);
59 } 59 }
60 #else 60 #else
61 static void __init display_system_type(unsigne 61 static void __init display_system_type(unsigned char machtype)
62 { 62 {
63 } 63 }
64 #endif 64 #endif
65 65
66 unsigned char *arch_get_platform_mac_address(v 66 unsigned char *arch_get_platform_mac_address(void)
67 { 67 {
68 return idprom->id_ethaddr; 68 return idprom->id_ethaddr;
69 } 69 }
70 70
71 /* Calculate the IDPROM checksum (xor of the d 71 /* Calculate the IDPROM checksum (xor of the data bytes). */
72 static unsigned char __init calc_idprom_cksum( 72 static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
73 { 73 {
74 unsigned char cksum, i, *ptr = (unsign 74 unsigned char cksum, i, *ptr = (unsigned char *)idprom;
75 75
76 for (i = cksum = 0; i <= 0x0E; i++) 76 for (i = cksum = 0; i <= 0x0E; i++)
77 cksum ^= *ptr++; 77 cksum ^= *ptr++;
78 78
79 return cksum; 79 return cksum;
80 } 80 }
81 81
82 /* Create a local IDPROM copy, verify integrit 82 /* Create a local IDPROM copy, verify integrity, and display information. */
83 void __init idprom_init(void) 83 void __init idprom_init(void)
84 { 84 {
85 prom_get_idprom((char *) &idprom_buffe 85 prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
86 86
87 idprom = &idprom_buffer; 87 idprom = &idprom_buffer;
88 88
89 if (idprom->id_format != 0x01) 89 if (idprom->id_format != 0x01)
90 prom_printf("IDPROM: Warning, 90 prom_printf("IDPROM: Warning, unknown format type!\n");
91 91
92 if (idprom->id_cksum != calc_idprom_ck 92 if (idprom->id_cksum != calc_idprom_cksum(idprom))
93 prom_printf("IDPROM: Warning, 93 prom_printf("IDPROM: Warning, checksum failure (nvram=%x, calc=%x)!\n",
94 idprom->id_cksum, 94 idprom->id_cksum, calc_idprom_cksum(idprom));
95 95
96 display_system_type(idprom->id_machtyp 96 display_system_type(idprom->id_machtype);
97 97
98 printk(KERN_WARNING "Ethernet address: 98 printk(KERN_WARNING "Ethernet address: %pM\n", idprom->id_ethaddr);
99 } 99 }
100 100
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