patch-2.1.44 linux/arch/mips/sgi/prom/tags.c

• Lines: 68
• Date: Thu Jun 26 12:33:38 1997
• Orig file: v2.1.43/linux/arch/mips/sgi/prom/tags.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.43/linux/arch/mips/sgi/prom/tags.c linux/arch/mips/sgi/prom/tags.c
@@ -0,0 +1,67 @@
+/* $Id: tags.c,v 1.1 1997/06/06 09:37:22 ralf Exp $
+ * tags.c: Initialize the arch tags the way the MIPS kernel setup
+ *         expects.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+#include <asm/addrspace.h>
+#include <asm/sgialib.h>
+#include <asm/bootinfo.h>
+#include <asm/sgimc.h>
+
+/* XXX This tag thing is a fucking rats nest, I'm very inclined to completely
+ * XXX rework the MIPS people's multi-arch code _NOW_.
+ */
+
+static unsigned long machtype_SGI_INDY = MACH_SGI_INDY;
+static unsigned long machgroup_SGI = MACH_GROUP_SGI;
+static unsigned long memlower_SGI_INDY = (KSEG0 + SGIMC_SEG0_BADDR);
+static unsigned long cputype_SGI_INDY = CPU_R4400SC;
+static unsigned long tlb_entries_SGI_INDY = 48;
+static unsigned long dummy_SGI_INDY = 0;
+static struct drive_info_struct dummy_dinfo_SGI_INDY = { { 0, }, };
+char arcs_cmdline[CL_SIZE];
+
+#define TAG(t,l)   {tag_##t,(l)} /* XXX RATS NEST CODE!!! XXX */
+#define TAGVAL(v)  (void*)&(v)   /* XXX FUCKING LOSING!!! XXX */
+
+tag_def taglist_sgi_indy[] = {
+	{TAG(machtype, ULONGSIZE), TAGVAL(machtype_SGI_INDY)},
+	{TAG(machgroup, ULONGSIZE), TAGVAL(machgroup_SGI)},
+	{TAG(memlower, ULONGSIZE), TAGVAL(memlower_SGI_INDY)},
+	{TAG(cputype, ULONGSIZE), TAGVAL(cputype_SGI_INDY)},
+	{TAG(tlb_entries, ULONGSIZE), TAGVAL(tlb_entries_SGI_INDY)},
+	{TAG(vram_base, ULONGSIZE), TAGVAL(dummy_SGI_INDY)},
+	{TAG(drive_info, DRVINFOSIZE), TAGVAL(dummy_dinfo_SGI_INDY)},
+	{TAG(mount_root_rdonly, ULONGSIZE), TAGVAL(dummy_SGI_INDY)},
+	{TAG(command_line, CL_SIZE), TAGVAL(arcs_cmdline[0])},
+	{TAG(dummy, 0), NULL}
+	/* XXX COLOSTOMY BAG!!!! XXX */
+};
+
+void prom_setup_archtags(void)
+{
+	tag_def *tdp = &taglist_sgi_indy[0];
+	tag *tp;
+
+	tp = (tag *) (mips_memory_upper - sizeof(tag));
+	while(tdp->t.tag != tag_dummy) {
+		unsigned long size;
+		char *d;
+
+		*tp = tdp->t;
+		size = tp->size;
+		d = (char *) tdp->d;
+		tp = (tag *)(((unsigned long)tp) - (tp->size));
+		if(size)
+			memcpy(tp, d, size);
+
+		tp--;
+		tdp++;
+	}
+	*tp = tdp->t; /* copy last dummy element over */
+}