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https://github.com/torvalds/linux
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190de00538
This reworks the boot wrapper library function that probes the chip clocks. Better separate the base function that is used on 440GX,SPe,EP,... from the uart fixups as those need different device-tree path on different processors. Also, rework the function itself based on the arch/ppc code from Eugene Surovegin which I find more readable, and which handles one more bypass case. Also handle the subtle difference between 440EP/EPx and 440SPe/GX, on the former, PerClk is derived from the PLB clock while on the later, it's derived from the OPB. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
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* Old U-boot compatibility for Sequoia
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*
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* Valentine Barshak <vbarshak@ru.mvista.com>
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* Copyright 2007 MontaVista Software, Inc
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*
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* Based on Ebony code by David Gibson <david@gibson.dropbear.id.au>
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* Copyright IBM Corporation, 2007
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*
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* Based on Bamboo code by Josh Boyer <jwboyer@linux.vnet.ibm.com>
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* Copyright IBM Corporation, 2007
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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; version 2 of the License
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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 "dcr.h"
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#include "4xx.h"
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#include "44x.h"
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#include "cuboot.h"
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#define TARGET_4xx
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#define TARGET_44x
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#include "ppcboot.h"
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static bd_t bd;
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static void sequoia_fixups(void)
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{
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unsigned long sysclk = 33333333;
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ibm440ep_fixup_clocks(sysclk, 11059200, 25000000);
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ibm4xx_fixup_ebc_ranges("/plb/opb/ebc");
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ibm4xx_denali_fixup_memsize();
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dt_fixup_mac_addresses(&bd.bi_enetaddr, &bd.bi_enet1addr);
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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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CUBOOT_INIT();
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platform_ops.fixups = sequoia_fixups;
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platform_ops.exit = ibm44x_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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