forked from Minki/linux
5cc5133a29
This adds cuboot support for MPC83xx platforms. A device tree used with this must have linux,stdout-path in /chosen and linux,network-index in any network device nodes that need mac addresses assigned. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
/*
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* Old U-boot compatibility for 83xx
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*
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* Author: Scott Wood <scottwood@freescale.com>
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*
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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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#define TARGET_83xx
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#include "ppcboot.h"
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static bd_t bd;
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extern char _end[];
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extern char _dtb_start[], _dtb_end[];
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static void platform_fixups(void)
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{
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void *soc;
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dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
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dt_fixup_mac_addresses(bd.bi_enetaddr, bd.bi_enet1addr);
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dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);
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/* Unfortunately, the specific model number is encoded in the
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* soc node name in existing dts files -- once that is fixed,
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* this can do a simple path lookup.
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*/
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soc = find_node_by_devtype(NULL, "soc");
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if (soc) {
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void *serial = NULL;
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setprop(soc, "bus-frequency", &bd.bi_busfreq,
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sizeof(bd.bi_busfreq));
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while ((serial = find_node_by_devtype(serial, "serial"))) {
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if (get_parent(serial) != soc)
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continue;
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setprop(serial, "clock-frequency", &bd.bi_busfreq,
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sizeof(bd.bi_busfreq));
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}
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}
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}
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void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7)
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{
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unsigned long end_of_ram = bd.bi_memstart + bd.bi_memsize;
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unsigned long avail_ram = end_of_ram - (unsigned long)_end;
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memcpy(&bd, (bd_t *)r3, sizeof(bd));
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loader_info.initrd_addr = r4;
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loader_info.initrd_size = r4 ? r5 : 0;
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loader_info.cmdline = (char *)r6;
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loader_info.cmdline_len = r7 - r6;
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simple_alloc_init(_end, avail_ram, 32, 64);
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ft_init(_dtb_start, _dtb_end - _dtb_start, 32);
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serial_console_init();
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platform_ops.fixups = platform_fixups;
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}
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