summaryrefslogtreecommitdiffstats
path: root/arch/sparc/prom/init.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sparc/prom/init.c')
-rw-r--r--arch/sparc/prom/init.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/sparc/prom/init.c b/arch/sparc/prom/init.c
new file mode 100644
index 000000000000..b83409c81916
--- /dev/null
+++ b/arch/sparc/prom/init.c
@@ -0,0 +1,95 @@
+/* $Id: init.c,v 1.14 2000/01/29 01:09:12 anton Exp $
+ * init.c: Initialize internal variables used by the PROM
+ * library functions.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+#include <asm/sun4prom.h>
+
+struct linux_romvec *romvec;
+enum prom_major_version prom_vers;
+unsigned int prom_rev, prom_prev;
+linux_sun4_romvec *sun4_romvec;
+
+/* The root node of the prom device tree. */
+int prom_root_node;
+
+int prom_stdin, prom_stdout;
+
+/* Pointer to the device tree operations structure. */
+struct linux_nodeops *prom_nodeops;
+
+/* 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_ranges_init(void);
+
+void __init prom_init(struct linux_romvec *rp)
+{
+#ifdef CONFIG_SUN4
+ extern struct linux_romvec *sun4_prom_init(void);
+ rp = sun4_prom_init();
+#endif
+ romvec = rp;
+
+ switch(romvec->pv_romvers) {
+ case 0:
+ prom_vers = PROM_V0;
+ break;
+ case 2:
+ prom_vers = PROM_V2;
+ break;
+ case 3:
+ prom_vers = PROM_V3;
+ break;
+ case 40:
+ prom_vers = PROM_SUN4;
+ break;
+ default:
+ prom_printf("PROMLIB: Bad PROM version %d\n",
+ romvec->pv_romvers);
+ prom_halt();
+ break;
+ };
+
+ prom_rev = romvec->pv_plugin_revision;
+ prom_prev = romvec->pv_printrev;
+ prom_nodeops = romvec->pv_nodeops;
+
+ prom_root_node = prom_getsibling(0);
+ if((prom_root_node == 0) || (prom_root_node == -1))
+ prom_halt();
+
+ if((((unsigned long) prom_nodeops) == 0) ||
+ (((unsigned long) prom_nodeops) == -1))
+ prom_halt();
+
+ if(prom_vers == PROM_V2 || prom_vers == PROM_V3) {
+ prom_stdout = *romvec->pv_v2bootargs.fd_stdout;
+ prom_stdin = *romvec->pv_v2bootargs.fd_stdin;
+ }
+
+ prom_meminit();
+
+ prom_ranges_init();
+
+#ifndef CONFIG_SUN4
+ /* SUN4 prints this in sun4_prom_init */
+ printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
+ romvec->pv_romvers, prom_rev);
+#endif
+
+ /* Initialization successful. */
+ return;
+}