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73 lines
1.8 KiB
73 lines
1.8 KiB
// 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 <[email protected]> |
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* Copyright 2002-2005 MontaVista Software Inc. |
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* |
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* Eugene Surovegin <[email protected]> or <[email protected]> |
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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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