idprom.c 4.3 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  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. * Sun3/3x models added by David Monro (davidm@psrg.cs.usyd.edu.au)
  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. #include <asm/oplib.h>
  15. #include <asm/idprom.h>
  16. #include <asm/machines.h> /* Fun with Sun released architectures. */
  17. struct idprom *idprom;
  18. EXPORT_SYMBOL(idprom);
  19. static struct idprom idprom_buffer;
  20. /* Here is the master table of Sun machines which use some implementation
  21. * of the Sparc CPU and have a meaningful IDPROM machtype value that we
  22. * know about. See asm-sparc/machines.h for empirical constants.
  23. */
  24. static struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = {
  25. /* First, Sun3's */
  26. { .name = "Sun 3/160 Series", .id_machtype = (SM_SUN3 | SM_3_160) },
  27. { .name = "Sun 3/50", .id_machtype = (SM_SUN3 | SM_3_50) },
  28. { .name = "Sun 3/260 Series", .id_machtype = (SM_SUN3 | SM_3_260) },
  29. { .name = "Sun 3/110 Series", .id_machtype = (SM_SUN3 | SM_3_110) },
  30. { .name = "Sun 3/60", .id_machtype = (SM_SUN3 | SM_3_60) },
  31. { .name = "Sun 3/E", .id_machtype = (SM_SUN3 | SM_3_E) },
  32. /* Now, Sun3x's */
  33. { .name = "Sun 3/460 Series", .id_machtype = (SM_SUN3X | SM_3_460) },
  34. { .name = "Sun 3/80", .id_machtype = (SM_SUN3X | SM_3_80) },
  35. /* Then, Sun4's */
  36. // { .name = "Sun 4/100 Series", .id_machtype = (SM_SUN4 | SM_4_110) },
  37. // { .name = "Sun 4/200 Series", .id_machtype = (SM_SUN4 | SM_4_260) },
  38. // { .name = "Sun 4/300 Series", .id_machtype = (SM_SUN4 | SM_4_330) },
  39. // { .name = "Sun 4/400 Series", .id_machtype = (SM_SUN4 | SM_4_470) },
  40. /* And now, Sun4c's */
  41. // { .name = "Sun4c SparcStation 1", .id_machtype = (SM_SUN4C | SM_4C_SS1) },
  42. // { .name = "Sun4c SparcStation IPC", .id_machtype = (SM_SUN4C | SM_4C_IPC) },
  43. // { .name = "Sun4c SparcStation 1+", .id_machtype = (SM_SUN4C | SM_4C_SS1PLUS) },
  44. // { .name = "Sun4c SparcStation SLC", .id_machtype = (SM_SUN4C | SM_4C_SLC) },
  45. // { .name = "Sun4c SparcStation 2", .id_machtype = (SM_SUN4C | SM_4C_SS2) },
  46. // { .name = "Sun4c SparcStation ELC", .id_machtype = (SM_SUN4C | SM_4C_ELC) },
  47. // { .name = "Sun4c SparcStation IPX", .id_machtype = (SM_SUN4C | SM_4C_IPX) },
  48. /* Finally, early Sun4m's */
  49. // { .name = "Sun4m SparcSystem600", .id_machtype = (SM_SUN4M | SM_4M_SS60) },
  50. // { .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) },
  51. // { .name = "Sun4m SparcStation5", .id_machtype = (SM_SUN4M | SM_4M_SS40) },
  52. /* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */
  53. // { .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) }
  54. };
  55. static void __init display_system_type(unsigned char machtype)
  56. {
  57. register int i;
  58. for (i = 0; i < NUM_SUN_MACHINES; i++) {
  59. if(Sun_Machines[i].id_machtype == machtype) {
  60. if (machtype != (SM_SUN4M_OBP | 0x00))
  61. pr_info("TYPE: %s\n", Sun_Machines[i].name);
  62. else {
  63. #if 0
  64. char sysname[128];
  65. prom_getproperty(prom_root_node, "banner-name",
  66. sysname, sizeof(sysname));
  67. pr_info("TYPE: %s\n", sysname);
  68. #endif
  69. }
  70. return;
  71. }
  72. }
  73. prom_printf("IDPROM: Bogus id_machtype value, 0x%x\n", machtype);
  74. prom_halt();
  75. }
  76. void sun3_get_model(unsigned char* model)
  77. {
  78. register int i;
  79. for (i = 0; i < NUM_SUN_MACHINES; i++) {
  80. if(Sun_Machines[i].id_machtype == idprom->id_machtype) {
  81. strcpy(model, Sun_Machines[i].name);
  82. return;
  83. }
  84. }
  85. }
  86. /* Calculate the IDPROM checksum (xor of the data bytes). */
  87. static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
  88. {
  89. unsigned char cksum, i, *ptr = (unsigned char *)idprom;
  90. for (i = cksum = 0; i <= 0x0E; i++)
  91. cksum ^= *ptr++;
  92. return cksum;
  93. }
  94. /* Create a local IDPROM copy, verify integrity, and display information. */
  95. void __init idprom_init(void)
  96. {
  97. prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
  98. idprom = &idprom_buffer;
  99. if (idprom->id_format != 0x01) {
  100. prom_printf("IDPROM: Unknown format type!\n");
  101. prom_halt();
  102. }
  103. if (idprom->id_cksum != calc_idprom_cksum(idprom)) {
  104. prom_printf("IDPROM: Checksum failure (nvram=%x, calc=%x)!\n",
  105. idprom->id_cksum, calc_idprom_cksum(idprom));
  106. prom_halt();
  107. }
  108. display_system_type(idprom->id_machtype);
  109. pr_info("Ethernet address: %pM\n", idprom->id_ethaddr);
  110. }