1 /* 2 * Copyright 2010 Ben. Herrenschmidt, IBM Corporation. 3 * 4 * Based on earlier code: 5 * Copyright (C) Paul Mackerras 1997. 6 * 7 * Matt Porter <mporter@kernel.crashing.org> 8 * Copyright 2002-2005 MontaVista Software Inc. 9 * 10 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> 11 * Copyright (c) 2003, 2004 Zultys Technologies 12 * 13 * Copyright 2007 David Gibson, IBM Corporation. 14 * 15 * This program is free software; you can redistribute it and/or 16 * modify it under the terms of the GNU General Public License 17 * as published by the Free Software Foundation; either version 18 * 2 of the License, or (at your option) any later version. 19 */ 20 #include <stdarg.h> 21 #include <stddef.h> 22 #include "types.h" 23 #include "elf.h" 24 #include "string.h" 25 #include "stdio.h" 26 #include "page.h" 27 #include "ops.h" 28 #include "reg.h" 29 #include "io.h" 30 #include "dcr.h" 31 #include "4xx.h" 32 #include "44x.h" 33 #include "libfdt.h" 34 35 BSS_STACK(4096); 36 37 static void iss_4xx_fixups(void) 38 { 39 ibm4xx_sdram_fixup_memsize(); 40 } 41 42 #define SPRN_PIR 0x11E /* Processor Indentification Register */ 43 void platform_init(void) 44 { 45 unsigned long end_of_ram = 0x08000000; 46 unsigned long avail_ram = end_of_ram - (unsigned long)_end; 47 u32 pir_reg; 48 49 simple_alloc_init(_end, avail_ram, 128, 64); 50 platform_ops.fixups = iss_4xx_fixups; 51 platform_ops.exit = ibm44x_dbcr_reset; 52 pir_reg = mfspr(SPRN_PIR); 53 fdt_set_boot_cpuid_phys(_dtb_start, pir_reg); 54 fdt_init(_dtb_start); 55 serial_console_init(); 56 } 57