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>
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/*
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* Old U-boot compatibility for Taishan
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*
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* Author: Hugh Blemings <hugh@au.ibm.com>
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*
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* Copyright 2007 Hugh Blemings, IBM Corporation.
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* Based on cuboot-ebony.c which is:
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* Copyright 2007 David Gibson, 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 "cuboot.h"
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#include "reg.h"
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#include "dcr.h"
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#include "4xx.h"
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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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BSS_STACK(4096);
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static void taishan_fixups(void)
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{
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/* FIXME: sysclk should be derived by reading the FPGA
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registers */
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unsigned long sysclk = 33000000;
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ibm440gx_fixup_clocks(sysclk, 6 * 1843200, 25000000);
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ibm4xx_sdram_fixup_memsize();
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dt_fixup_mac_addresses(bd.bi_enetaddr, bd.bi_enet1addr);
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ibm4xx_fixup_ebc_ranges("/plb/opb/ebc");
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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 = taishan_fixups;
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fdt_init(_dtb_start);
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serial_console_init();
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}
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