/* * Copyright 2010 Ben. Herrenschmidt, IBM Corporation. * * Based on earlier code: * Copyright (C) Paul Mackerras 1997. * * Matt Porter <mporter@kernel.crashing.org> * Copyright 2002-2005 MontaVista Software Inc. * * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> * Copyright (c) 2003, 2004 Zultys Technologies * * Copyright 2007 David Gibson, IBM Corporation. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <stdarg.h> #include <stddef.h> #include "types.h" #include "elf.h" #include "string.h" #include "stdio.h" #include "page.h" #include "ops.h" #include "reg.h" #include "io.h" #include "dcr.h" #include "4xx.h" #include "44x.h" #include "libfdt.h" BSS_STACK(4096); static u32 ibm4xx_memstart; static void iss_4xx_fixups(void) { void *memory; u32 reg[3]; memory = finddevice("/memory"); if (!memory) fatal("Can't find memory node\n"); /* This assumes #address-cells = 2, #size-cells =1 and that */ getprop(memory, "reg", reg, sizeof(reg)); if (reg[2]) /* If the device tree specifies the memory range, use it */ ibm4xx_memstart = reg[1]; else /* othersize, read it from the SDRAM controller */ ibm4xx_sdram_fixup_memsize(); } static void *iss_4xx_vmlinux_alloc(unsigned long size) { return (void *)ibm4xx_memstart; } #define SPRN_PIR 0x11E /* Processor Identification Register */ void platform_init(void) { unsigned long end_of_ram = 0x08000000; unsigned long avail_ram = end_of_ram - (unsigned long)_end; u32 pir_reg; simple_alloc_init(_end, avail_ram, 128, 64); platform_ops.fixups = iss_4xx_fixups; platform_ops.vmlinux_alloc = iss_4xx_vmlinux_alloc; platform_ops.exit = ibm44x_dbcr_reset; pir_reg = mfspr(SPRN_PIR); fdt_set_boot_cpuid_phys(_dtb_start, pir_reg); fdt_init(_dtb_start); serial_console_init(); }