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