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102 lines
2.4 KiB
102 lines
2.4 KiB
20 years ago
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/* $Id: init.c,v 1.10 1999/09/21 14:35:59 davem Exp $
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* init.c: Initialize internal variables used by the PROM
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* library functions.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/ctype.h>
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#include <asm/openprom.h>
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#include <asm/oplib.h>
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enum prom_major_version prom_vers;
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unsigned int prom_rev, prom_prev;
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/* The root node of the prom device tree. */
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int prom_root_node;
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int prom_stdin, prom_stdout;
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int prom_chosen_node;
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/* You must call prom_init() before you attempt to use any of the
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* routines in the prom library. It returns 0 on success, 1 on
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* failure. It gets passed the pointer to the PROM vector.
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*/
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extern void prom_meminit(void);
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extern void prom_cif_init(void *, void *);
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void __init prom_init(void *cif_handler, void *cif_stack)
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{
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char buffer[80], *p;
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int ints[3];
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int node;
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int i = 0;
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int bufadjust;
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prom_vers = PROM_P1275;
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prom_cif_init(cif_handler, cif_stack);
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prom_root_node = prom_getsibling(0);
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if((prom_root_node == 0) || (prom_root_node == -1))
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prom_halt();
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prom_chosen_node = prom_finddevice("/chosen");
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if (!prom_chosen_node || prom_chosen_node == -1)
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prom_halt();
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prom_stdin = prom_getint (prom_chosen_node, "stdin");
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prom_stdout = prom_getint (prom_chosen_node, "stdout");
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node = prom_finddevice("/openprom");
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if (!node || node == -1)
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prom_halt();
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prom_getstring (node, "version", buffer, sizeof (buffer));
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prom_printf ("\n");
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if (strncmp (buffer, "OBP ", 4))
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goto strange_version;
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/*
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* Version field is expected to be 'OBP xx.yy.zz date...'
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* However, Sun can't stick to this format very well, so
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* we need to check for 'OBP xx.yy.zz date...' and adjust
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* accordingly. -spot
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*/
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if (strncmp (buffer, "OBP ", 5))
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bufadjust = 4;
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else
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bufadjust = 5;
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p = buffer + bufadjust;
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while (p && isdigit(*p) && i < 3) {
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ints[i++] = simple_strtoul(p, NULL, 0);
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if ((p = strchr(p, '.')) != NULL)
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p++;
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}
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if (i != 3)
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goto strange_version;
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prom_rev = ints[1];
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prom_prev = (ints[0] << 16) | (ints[1] << 8) | ints[2];
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printk ("PROMLIB: Sun IEEE Boot Prom %s\n", buffer + bufadjust);
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prom_meminit();
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/* Initialization successful. */
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return;
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strange_version:
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prom_printf ("Strange OBP version `%s'.\n", buffer);
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prom_halt ();
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}
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