| 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 | |
| 16 | struct idprom *idprom; |
| 17 | EXPORT_SYMBOL(idprom); |
| 18 | |
| 19 | static 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 | */ |
| 28 | static 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 | |
| 38 | static 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 |
| 59 | static void __init display_system_type(unsigned char machtype) |
| 60 | { |
| 61 | } |
| 62 | #endif |
| 63 | /* Calculate the IDPROM checksum (xor of the data bytes). */ |
| 64 | static 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. */ |
| 75 | void __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 | } |