tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 * Sun3/3x models added by David Monro (davidm@psrg.cs.usyd.edu.au)
7 */
8
9#include <linux/module.h>
10#include <linux/kernel.h>
11#include <linux/types.h>
12#include <linux/init.h>
13#include <linux/string.h>
14
15#include <asm/oplib.h>
16#include <asm/idprom.h>
17#include <asm/machines.h> /* Fun with Sun released architectures. */
18
19struct idprom *idprom;
20EXPORT_SYMBOL(idprom);
21
22static struct idprom idprom_buffer;
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[NUM_SUN_MACHINES] = {
29/* First, Sun3's */
30 { .name = "Sun 3/160 Series", .id_machtype = (SM_SUN3 | SM_3_160) },
31 { .name = "Sun 3/50", .id_machtype = (SM_SUN3 | SM_3_50) },
32 { .name = "Sun 3/260 Series", .id_machtype = (SM_SUN3 | SM_3_260) },
33 { .name = "Sun 3/110 Series", .id_machtype = (SM_SUN3 | SM_3_110) },
34 { .name = "Sun 3/60", .id_machtype = (SM_SUN3 | SM_3_60) },
35 { .name = "Sun 3/E", .id_machtype = (SM_SUN3 | SM_3_E) },
36/* Now, Sun3x's */
37 { .name = "Sun 3/460 Series", .id_machtype = (SM_SUN3X | SM_3_460) },
38 { .name = "Sun 3/80", .id_machtype = (SM_SUN3X | SM_3_80) },
39/* Then, Sun4's */
40// { .name = "Sun 4/100 Series", .id_machtype = (SM_SUN4 | SM_4_110) },
41// { .name = "Sun 4/200 Series", .id_machtype = (SM_SUN4 | SM_4_260) },
42// { .name = "Sun 4/300 Series", .id_machtype = (SM_SUN4 | SM_4_330) },
43// { .name = "Sun 4/400 Series", .id_machtype = (SM_SUN4 | SM_4_470) },
44/* And now, Sun4c's */
45// { .name = "Sun4c SparcStation 1", .id_machtype = (SM_SUN4C | SM_4C_SS1) },
46// { .name = "Sun4c SparcStation IPC", .id_machtype = (SM_SUN4C | SM_4C_IPC) },
47// { .name = "Sun4c SparcStation 1+", .id_machtype = (SM_SUN4C | SM_4C_SS1PLUS) },
48// { .name = "Sun4c SparcStation SLC", .id_machtype = (SM_SUN4C | SM_4C_SLC) },
49// { .name = "Sun4c SparcStation 2", .id_machtype = (SM_SUN4C | SM_4C_SS2) },
50// { .name = "Sun4c SparcStation ELC", .id_machtype = (SM_SUN4C | SM_4C_ELC) },
51// { .name = "Sun4c SparcStation IPX", .id_machtype = (SM_SUN4C | SM_4C_IPX) },
52/* Finally, early Sun4m's */
53// { .name = "Sun4m SparcSystem600", .id_machtype = (SM_SUN4M | SM_4M_SS60) },
54// { .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) },
55// { .name = "Sun4m SparcStation5", .id_machtype = (SM_SUN4M | SM_4M_SS40) },
56/* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */
57// { .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) }
58};
59
60static void __init display_system_type(unsigned char machtype)
61{
62 register int i;
63
64 for (i = 0; i < NUM_SUN_MACHINES; i++) {
65 if(Sun_Machines[i].id_machtype == machtype) {
66 if (machtype != (SM_SUN4M_OBP | 0x00))
67 pr_info("TYPE: %s\n", Sun_Machines[i].name);
68 else {
69#if 0
70 char sysname[128];
71
72 prom_getproperty(prom_root_node, "banner-name",
73 sysname, sizeof(sysname));
74 pr_info("TYPE: %s\n", sysname);
75#endif
76 }
77 return;
78 }
79 }
80
81 prom_printf("IDPROM: Bogus id_machtype value, 0x%x\n", machtype);
82 prom_halt();
83}
84
85void sun3_get_model(unsigned char* model)
86{
87 register int i;
88
89 for (i = 0; i < NUM_SUN_MACHINES; i++) {
90 if(Sun_Machines[i].id_machtype == idprom->id_machtype) {
91 strcpy(model, Sun_Machines[i].name);
92 return;
93 }
94 }
95}
96
97
98
99/* Calculate the IDPROM checksum (xor of the data bytes). */
100static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
101{
102 unsigned char cksum, i, *ptr = (unsigned char *)idprom;
103
104 for (i = cksum = 0; i <= 0x0E; i++)
105 cksum ^= *ptr++;
106
107 return cksum;
108}
109
110/* Create a local IDPROM copy, verify integrity, and display information. */
111void __init idprom_init(void)
112{
113 prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
114
115 idprom = &idprom_buffer;
116
117 if (idprom->id_format != 0x01) {
118 prom_printf("IDPROM: Unknown format type!\n");
119 prom_halt();
120 }
121
122 if (idprom->id_cksum != calc_idprom_cksum(idprom)) {
123 prom_printf("IDPROM: Checksum failure (nvram=%x, calc=%x)!\n",
124 idprom->id_cksum, calc_idprom_cksum(idprom));
125 prom_halt();
126 }
127
128 display_system_type(idprom->id_machtype);
129
130 pr_info("Ethernet address: %pM\n", idprom->id_ethaddr);
131}