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173ba87b95
The uppermost part of memory is where u-boot puts the stack, so don't include that in the heap. It's not currently causing problems, as the current code allocates from the bottom of the heap, but this will keep things from potentially breaking if a future implementation were to allocate from the top. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
68 lines
1.8 KiB
C
68 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 - 1024*1024, 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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