1 files changed, 93 insertions, 0 deletions
diff --git a/arch/mips/dec/prom/init.c b/arch/mips/dec/prom/init.c
new file mode 100644
index 000000000..717dda622
--- /dev/null
+++ b/arch/mips/dec/prom/init.c
@@ -0,0 +1,93 @@
+/*
+ * init.c: PROM library initialisation code.
+ *
+ * Copyright (C) 1998 Harald Koerfgen
+ *
+ * $Id: $
+ */
+#include <linux/init.h>
+#include <linux/config.h>
+#include "prom.h"
+
+/*
+ * PROM Interface (whichprom.c)
+ */
+typedef struct {
+	int pagesize;
+	unsigned char bitmap[0];
+} memmap;
+
+int (*rex_bootinit)(void);
+int (*rex_bootread)(void);
+int (*rex_getbitmap)(memmap *);
+unsigned long *(*rex_slot_address)(int);
+void *(*rex_gettcinfo)(void);
+int (*rex_getsysid)(void);
+void (*rex_clear_cache)(void);
+
+int (*prom_getchar)(void);
+char *(*prom_getenv)(char *);
+int (*prom_printf)(char *, ...);
+
+int (*pmax_open)(char*, int);
+int (*pmax_lseek)(int, long, int);
+int (*pmax_read)(int, void *, int);
+int (*pmax_close)(int);
+
+extern void prom_meminit(unsigned int);
+extern void prom_identify_arch(unsigned int);
+extern void prom_init_cmdline(int, char **, unsigned long);
+
+/*
+ * Detect which PROM's the DECSTATION has, and set the callback vectors
+ * appropriately.
+ */
+__initfunc(void which_prom(unsigned long magic, int *prom_vec))
+{
+	/*
+	 * No sign of the REX PROM's magic number means we assume a non-REX
+	 * machine (i.e. we're on a DS2100/3100, DS5100 or DS5000/2xx)
+	 */
+	if (magic == REX_PROM_MAGIC)
+	{
+		/*
+		 * Set up prom abstraction structure with REX entry points.
+		 */
+		rex_bootinit = (int (*)(void)) *(prom_vec + REX_PROM_BOOTINIT);
+		rex_bootread = (int (*)(void)) *(prom_vec + REX_PROM_BOOTREAD);
+		rex_getbitmap = (int (*)(memmap *)) *(prom_vec + REX_PROM_GETBITMAP);
+		prom_getchar = (int (*)(void)) *(prom_vec + REX_PROM_GETCHAR);
+		prom_getenv = (char *(*)(char *)) *(prom_vec + REX_PROM_GETENV);
+		rex_getsysid = (int (*)(void)) *(prom_vec + REX_PROM_GETSYSID);
+		rex_gettcinfo = (void *(*)(void)) *(prom_vec + REX_PROM_GETTCINFO);
+		prom_printf = (int (*)(char *, ...)) *(prom_vec + REX_PROM_PRINTF);
+		rex_slot_address = (unsigned long *(*)(int)) *(prom_vec + REX_PROM_SLOTADDR);
+		rex_clear_cache = (void (*)(void)) * (prom_vec + REX_PROM_CLEARCACHE);
+	}
+	else
+	{
+		/*
+		 * Set up prom abstraction structure with non-REX entry points.
+		 */
+		prom_getchar = (int (*)(void)) PMAX_PROM_GETCHAR;
+		prom_getenv = (char *(*)(char *)) PMAX_PROM_GETENV;
+		prom_printf = (int (*)(char *, ...)) PMAX_PROM_PRINTF;
+		pmax_open = (int (*)(char *, int)) PMAX_PROM_OPEN;
+		pmax_lseek = (int (*)(int, long, int)) PMAX_PROM_LSEEK;
+		pmax_read = (int (*)(int, void *, int)) PMAX_PROM_READ;
+		pmax_close = (int (*)(int)) PMAX_PROM_CLOSE;
+	}
+} 
+
+__initfunc(int prom_init(int argc, char **argv,
+	       unsigned long magic, int *prom_vec))
+{
+	/* Determine which PROM's we have (and therefore which machine we're on!) */
+	which_prom(magic, prom_vec);
+
+	prom_meminit(magic);
+	prom_identify_arch(magic);
+	prom_init_cmdline(argc, argv, magic);
+
+	return 0;
+}