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99 lines
2.9 KiB
99 lines
2.9 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* idprom.c: Routines to load the idprom into kernel addresses and |
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* interpret the data contained within. |
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* |
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* Copyright (C) 1995 David S. Miller ([email protected]) |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/init.h> |
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#include <linux/export.h> |
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#include <linux/etherdevice.h> |
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#include <asm/oplib.h> |
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#include <asm/idprom.h> |
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struct idprom *idprom; |
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EXPORT_SYMBOL(idprom); |
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static struct idprom idprom_buffer; |
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#ifdef CONFIG_SPARC32 |
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#include <asm/machines.h> /* Fun with Sun released architectures. */ |
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/* Here is the master table of Sun machines which use some implementation |
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* of the Sparc CPU and have a meaningful IDPROM machtype value that we |
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* know about. See asm-sparc/machines.h for empirical constants. |
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*/ |
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static struct Sun_Machine_Models Sun_Machines[] = { |
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/* First, Leon */ |
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{ .name = "Leon3 System-on-a-Chip", .id_machtype = (M_LEON | M_LEON3_SOC) }, |
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/* Finally, early Sun4m's */ |
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{ .name = "Sun4m SparcSystem600", .id_machtype = (SM_SUN4M | SM_4M_SS60) }, |
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{ .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) }, |
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{ .name = "Sun4m SparcStation5", .id_machtype = (SM_SUN4M | SM_4M_SS40) }, |
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/* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */ |
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{ .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) } }; |
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static void __init display_system_type(unsigned char machtype) |
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{ |
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char sysname[128]; |
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register int i; |
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for (i = 0; i < ARRAY_SIZE(Sun_Machines); i++) { |
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if (Sun_Machines[i].id_machtype == machtype) { |
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if (machtype != (SM_SUN4M_OBP | 0x00) || |
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prom_getproperty(prom_root_node, "banner-name", |
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sysname, sizeof(sysname)) <= 0) |
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printk(KERN_WARNING "TYPE: %s\n", |
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Sun_Machines[i].name); |
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else |
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printk(KERN_WARNING "TYPE: %s\n", sysname); |
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return; |
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} |
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} |
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prom_printf("IDPROM: Warning, bogus id_machtype value, 0x%x\n", machtype); |
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} |
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#else |
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static void __init display_system_type(unsigned char machtype) |
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{ |
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} |
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#endif |
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unsigned char *arch_get_platform_mac_address(void) |
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{ |
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return idprom->id_ethaddr; |
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} |
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/* Calculate the IDPROM checksum (xor of the data bytes). */ |
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static unsigned char __init calc_idprom_cksum(struct idprom *idprom) |
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{ |
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unsigned char cksum, i, *ptr = (unsigned char *)idprom; |
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for (i = cksum = 0; i <= 0x0E; i++) |
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cksum ^= *ptr++; |
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return cksum; |
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} |
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/* Create a local IDPROM copy, verify integrity, and display information. */ |
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void __init idprom_init(void) |
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{ |
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prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer)); |
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idprom = &idprom_buffer; |
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if (idprom->id_format != 0x01) |
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prom_printf("IDPROM: Warning, unknown format type!\n"); |
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if (idprom->id_cksum != calc_idprom_cksum(idprom)) |
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prom_printf("IDPROM: Warning, checksum failure (nvram=%x, calc=%x)!\n", |
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idprom->id_cksum, calc_idprom_cksum(idprom)); |
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display_system_type(idprom->id_machtype); |
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printk(KERN_WARNING "Ethernet address: %pM\n", idprom->id_ethaddr); |
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}
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