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https://github.com/edk2-porting/linux-next.git
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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>
85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
/*
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* Old U-boot compatibility for Walnut
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*
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* Author: Josh Boyer <jwboyer@linux.vnet.ibm.com>
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*
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* Copyright 2007 IBM Corporation
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* Based on cuboot-83xx.c, which is:
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* Copyright (c) 2007 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#include "ops.h"
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#include "stdio.h"
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#include "dcr.h"
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#include "4xx.h"
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#include "io.h"
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BSS_STACK(4096);
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static void walnut_flashsel_fixup(void)
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{
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void *devp, *sram;
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u32 reg_flash[3] = {0x0, 0x0, 0x80000};
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u32 reg_sram[3] = {0x0, 0x0, 0x80000};
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u8 *fpga;
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u8 fpga_brds1 = 0x0;
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devp = finddevice("/plb/ebc/fpga");
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if (!devp)
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fatal("Couldn't locate FPGA node\n\r");
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if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga))
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fatal("no virtual-reg property\n\r");
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fpga_brds1 = in_8(fpga);
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devp = finddevice("/plb/ebc/flash");
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if (!devp)
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fatal("Couldn't locate flash node\n\r");
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if (getprop(devp, "reg", reg_flash, sizeof(reg_flash)) != sizeof(reg_flash))
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fatal("flash reg property has unexpected size\n\r");
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sram = finddevice("/plb/ebc/sram");
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if (!sram)
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fatal("Couldn't locate sram node\n\r");
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if (getprop(sram, "reg", reg_sram, sizeof(reg_sram)) != sizeof(reg_sram))
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fatal("sram reg property has unexpected size\n\r");
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if (fpga_brds1 & 0x1) {
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reg_flash[1] ^= 0x80000;
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reg_sram[1] ^= 0x80000;
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}
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setprop(devp, "reg", reg_flash, sizeof(reg_flash));
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setprop(sram, "reg", reg_sram, sizeof(reg_sram));
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}
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#define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b
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static void walnut_fixups(void)
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{
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ibm4xx_sdram_fixup_memsize();
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ibm405gp_fixup_clocks(33330000, 0xa8c000);
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ibm4xx_quiesce_eth((u32 *)0xef600800, NULL);
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ibm4xx_fixup_ebc_ranges("/plb/ebc");
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walnut_flashsel_fixup();
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dt_fixup_mac_address_by_alias("ethernet0", (u8 *) WALNUT_OPENBIOS_MAC_OFF);
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}
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void platform_init(void)
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{
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unsigned long end_of_ram = 0x2000000;
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unsigned long avail_ram = end_of_ram - (unsigned long) _end;
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simple_alloc_init(_end, avail_ram, 32, 32);
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platform_ops.fixups = walnut_fixups;
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platform_ops.exit = ibm40x_dbcr_reset;
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fdt_init(_dtb_start);
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serial_console_init();
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}
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