74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2010 Ben. Herrenschmidt, IBM Corporation.
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*
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* Based on earlier code:
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* Copyright (C) Paul Mackerras 1997.
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*
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* Matt Porter <mporter@kernel.crashing.org>
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* Copyright 2002-2005 MontaVista Software Inc.
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*
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* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
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* Copyright (c) 2003, 2004 Zultys Technologies
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*
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* Copyright 2007 David Gibson, IBM Corporation.
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*/
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#include <stdarg.h>
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#include <stddef.h>
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#include "types.h"
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#include "elf.h"
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#include "string.h"
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#include "stdio.h"
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#include "page.h"
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#include "ops.h"
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#include "reg.h"
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#include "io.h"
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#include "dcr.h"
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#include "4xx.h"
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#include "44x.h"
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#include "libfdt.h"
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BSS_STACK(4096);
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static u32 ibm4xx_memstart;
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static void iss_4xx_fixups(void)
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{
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void *memory;
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u32 reg[3];
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memory = finddevice("/memory");
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if (!memory)
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fatal("Can't find memory node\n");
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/* This assumes #address-cells = 2, #size-cells =1 and that */
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getprop(memory, "reg", reg, sizeof(reg));
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if (reg[2])
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/* If the device tree specifies the memory range, use it */
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ibm4xx_memstart = reg[1];
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else
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/* othersize, read it from the SDRAM controller */
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ibm4xx_sdram_fixup_memsize();
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}
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static void *iss_4xx_vmlinux_alloc(unsigned long size)
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{
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return (void *)ibm4xx_memstart;
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}
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#define SPRN_PIR 0x11E /* Processor Identification Register */
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void platform_init(void)
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{
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unsigned long end_of_ram = 0x08000000;
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unsigned long avail_ram = end_of_ram - (unsigned long)_end;
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u32 pir_reg;
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simple_alloc_init(_end, avail_ram, 128, 64);
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platform_ops.fixups = iss_4xx_fixups;
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platform_ops.vmlinux_alloc = iss_4xx_vmlinux_alloc;
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platform_ops.exit = ibm44x_dbcr_reset;
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pir_reg = mfspr(SPRN_PIR);
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fdt_set_boot_cpuid_phys(_dtb_start, pir_reg);
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fdt_init(_dtb_start);
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serial_console_init();
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}
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