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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
88278ca2 | 2 | /* |
1da177e4 LT |
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 | ||
1da177e4 LT |
9 | #include <linux/kernel.h> |
10 | #include <linux/types.h> | |
11 | #include <linux/init.h> | |
066bcaca | 12 | #include <linux/export.h> |
c7f5d105 | 13 | #include <linux/etherdevice.h> |
1da177e4 LT |
14 | |
15 | #include <asm/oplib.h> | |
16 | #include <asm/idprom.h> | |
1da177e4 LT |
17 | |
18 | struct idprom *idprom; | |
6943f3da SR |
19 | EXPORT_SYMBOL(idprom); |
20 | ||
1da177e4 LT |
21 | static struct idprom idprom_buffer; |
22 | ||
680e58f8 | 23 | #ifdef CONFIG_SPARC32 |
7d3a7001 SR |
24 | #include <asm/machines.h> /* Fun with Sun released architectures. */ |
25 | ||
1da177e4 LT |
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 | */ | |
58fa4dcb DM |
30 | static struct Sun_Machine_Models Sun_Machines[] = { |
31 | /* First, Leon */ | |
0fd7ef1f | 32 | { .name = "Leon3 System-on-a-Chip", .id_machtype = (M_LEON | M_LEON3_SOC) }, |
1da177e4 | 33 | /* Finally, early Sun4m's */ |
7d3a7001 SR |
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) }, | |
1da177e4 | 37 | /* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */ |
7d3a7001 | 38 | { .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) } }; |
1da177e4 LT |
39 | |
40 | static void __init display_system_type(unsigned char machtype) | |
41 | { | |
42 | char sysname[128]; | |
43 | register int i; | |
44 | ||
58fa4dcb | 45 | for (i = 0; i < ARRAY_SIZE(Sun_Machines); i++) { |
7d3a7001 | 46 | if (Sun_Machines[i].id_machtype == machtype) { |
1da177e4 LT |
47 | if (machtype != (SM_SUN4M_OBP | 0x00) || |
48 | prom_getproperty(prom_root_node, "banner-name", | |
49 | sysname, sizeof(sysname)) <= 0) | |
7d3a7001 SR |
50 | printk(KERN_WARNING "TYPE: %s\n", |
51 | Sun_Machines[i].name); | |
1da177e4 | 52 | else |
7d3a7001 | 53 | printk(KERN_WARNING "TYPE: %s\n", sysname); |
1da177e4 LT |
54 | return; |
55 | } | |
56 | } | |
57 | ||
7d3a7001 | 58 | prom_printf("IDPROM: Warning, bogus id_machtype value, 0x%x\n", machtype); |
1da177e4 | 59 | } |
680e58f8 SR |
60 | #else |
61 | static void __init display_system_type(unsigned char machtype) | |
62 | { | |
63 | } | |
64 | #endif | |
c7f5d105 DM |
65 | |
66 | unsigned char *arch_get_platform_mac_address(void) | |
67 | { | |
68 | return idprom->id_ethaddr; | |
69 | } | |
70 | ||
1da177e4 LT |
71 | /* Calculate the IDPROM checksum (xor of the data bytes). */ |
72 | static 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. */ | |
83 | void __init idprom_init(void) | |
84 | { | |
85 | prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer)); | |
86 | ||
87 | idprom = &idprom_buffer; | |
88 | ||
680e58f8 | 89 | if (idprom->id_format != 0x01) |
7d3a7001 | 90 | prom_printf("IDPROM: Warning, unknown format type!\n"); |
1da177e4 | 91 | |
680e58f8 | 92 | if (idprom->id_cksum != calc_idprom_cksum(idprom)) |
7d3a7001 | 93 | prom_printf("IDPROM: Warning, checksum failure (nvram=%x, calc=%x)!\n", |
1da177e4 | 94 | idprom->id_cksum, calc_idprom_cksum(idprom)); |
1da177e4 LT |
95 | |
96 | display_system_type(idprom->id_machtype); | |
97 | ||
e3c6d4ee | 98 | printk(KERN_WARNING "Ethernet address: %pM\n", idprom->id_ethaddr); |
1da177e4 | 99 | } |