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https://github.com/torvalds/linux
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ecc6cd73b7
This patch alters the bootwrapper for a number of machines (roubhly all 4xx based cuboot or treeboot platforms) to use aliases instead of the linux,network-index hack to work out which MAC address to attach to which ethernet device node. The now obsolete linux,network-index properties are removed from the corresponding device trees. This won't break backwards compatiblity, because in cases where this fixup code is relevant, the device tree is part of the kernel image. The references to linux,network-index are removed from booting-without-of.txt. Not only is it now deprecated, but as a hack applicable only when the device tree blob and fixup code were in the same image, this property never belonged in booting-without-of.txt which describes the interface between the kernel and firmware or bootloaders which produce a device tree. By the time the device tree reaches the kernel, all the MAC addresses must be fully filled in. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/*
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* Copyright 2007 David Gibson, 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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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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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static u8 *ebony_mac0, *ebony_mac1;
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#define EBONY_FPGA_PATH "/plb/opb/ebc/fpga"
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#define EBONY_FPGA_FLASH_SEL 0x01
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#define EBONY_SMALL_FLASH_PATH "/plb/opb/ebc/small-flash"
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static void ebony_flashsel_fixup(void)
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{
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void *devp;
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u32 reg[3] = {0x0, 0x0, 0x80000};
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u8 *fpga;
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u8 fpga_reg0 = 0x0;
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devp = finddevice(EBONY_FPGA_PATH);
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if (!devp)
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fatal("Couldn't locate FPGA node %s\n\r", EBONY_FPGA_PATH);
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if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga))
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fatal("%s has missing or invalid virtual-reg property\n\r",
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EBONY_FPGA_PATH);
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fpga_reg0 = in_8(fpga);
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devp = finddevice(EBONY_SMALL_FLASH_PATH);
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if (!devp)
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fatal("Couldn't locate small flash node %s\n\r",
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EBONY_SMALL_FLASH_PATH);
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if (getprop(devp, "reg", reg, sizeof(reg)) != sizeof(reg))
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fatal("%s has reg property of unexpected size\n\r",
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EBONY_SMALL_FLASH_PATH);
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/* Invert address bit 14 (IBM-endian) if FLASH_SEL fpga bit is set */
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if (fpga_reg0 & EBONY_FPGA_FLASH_SEL)
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reg[1] ^= 0x80000;
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setprop(devp, "reg", reg, sizeof(reg));
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}
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static void ebony_fixups(void)
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{
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// FIXME: sysclk should be derived by reading the FPGA registers
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unsigned long sysclk = 33000000;
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ibm440gp_fixup_clocks(sysclk, 6 * 1843200);
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ibm4xx_sdram_fixup_memsize();
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dt_fixup_mac_address_by_alias("ethernet0", ebony_mac0);
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dt_fixup_mac_address_by_alias("ethernet1", ebony_mac1);
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ibm4xx_fixup_ebc_ranges("/plb/opb/ebc");
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ebony_flashsel_fixup();
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}
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void ebony_init(void *mac0, void *mac1)
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{
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platform_ops.fixups = ebony_fixups;
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platform_ops.exit = ibm44x_dbcr_reset;
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ebony_mac0 = mac0;
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ebony_mac1 = mac1;
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fdt_init(_dtb_start);
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serial_console_init();
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}
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