patch-2.4.10 linux/arch/mips/philips/nino/prom.c

• Lines: 81
• Date: Sun Sep 9 10:43:02 2001
• Orig file: v2.4.9/linux/arch/mips/philips/nino/prom.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.9/linux/arch/mips/philips/nino/prom.c linux/arch/mips/philips/nino/prom.c
@@ -0,0 +1,80 @@
+/*
+ *  linux/arch/mips/philips/nino/prom.c
+ *
+ *  Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *  
+ *  Early initialization code for the Philips Nino.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <asm/bootinfo.h>
+#include <asm/addrspace.h>
+#include <asm/page.h>
+
+char arcs_cmdline[COMMAND_LINE_SIZE];
+
+#ifdef CONFIG_FB_TX3912
+extern u_long tx3912fb_paddr;
+extern u_long tx3912fb_vaddr;
+extern u_long tx3912fb_size;
+#endif
+
+/* Do basic initialization */
+void __init prom_init(int argc, char **argv,
+		unsigned long magic, int *prom_vec)
+{
+	u_long free_end, mem_size;
+	u_int i;
+
+	/*
+	 * collect args and prepare cmd_line
+	 */
+	for (i = 1; i < argc; i++) {
+		strcat(arcs_cmdline, argv[i]);
+		if (i < (argc - 1))
+			strcat(arcs_cmdline, " ");
+	}
+
+	mips_machgroup = MACH_GROUP_PHILIPS;
+	mips_machtype = MACH_PHILIPS_NINO;
+
+#ifdef CONFIG_NINO_4MB
+	mem_size = 4 << 20;
+#elif CONFIG_NINO_8MB
+	mem_size = 8 << 20;
+#elif CONFIG_NINO_16MB
+	mem_size = 16 << 20;
+#endif
+
+#ifdef CONFIG_FB_TX3912
+	/*
+	 * The LCD controller requires that the framebuffer
+	 * start address fall within a 1MB segment and is
+	 * aligned on a 16 byte boundary. The way to assure
+	 * this is to place the framebuffer at the end of
+	 * memory and mark it as reserved.
+	 */
+	free_end = (mem_size - tx3912fb_size) & PAGE_MASK;
+	add_memory_region(0, free_end, BOOT_MEM_RAM); 
+	add_memory_region(free_end, (mem_size - free_end), BOOT_MEM_RESERVED); 
+
+	/*
+	 * Calculate physical and virtual addresses for
+	 * the beginning of the framebuffer.
+	 */
+	tx3912fb_paddr = PHYSADDR(free_end);
+	tx3912fb_vaddr = KSEG1ADDR(free_end);
+#else
+	add_memory_region(0, mem_size, BOOT_MEM_RAM); 
+#endif
+}
+
+void __init prom_free_prom_memory (void)
+{
+}