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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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f6dfc80554
This adds platform support code for the Ebony (440GP) evaluation board. This includes both code in arch/powerpc/platforms/44x for board initialization, and zImage wrapper code to correctly tweak the flattened device tree based on information from the firmware. The zImage supports both IBM OpenBIOS (aka "treeboot") and old versions of uboot which don't support a flattened device tree. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
35 lines
865 B
C
35 lines
865 B
C
/*
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* Old U-boot compatibility for Ebony
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*
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* Author: David Gibson <david@gibson.dropbear.id.au>
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*
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* Copyright 2007 David Gibson, IBM Corporatio.
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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 "44x.h"
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extern char _end[];
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BSS_STACK(4096);
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#define OPENBIOS_MAC_BASE 0xfffffe0c
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#define OPENBIOS_MAC_OFFSET 0xc
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void platform_init(void)
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{
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unsigned long end_of_ram = 0x8000000;
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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, 64);
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ebony_init((u8 *)OPENBIOS_MAC_BASE,
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(u8 *)(OPENBIOS_MAC_BASE + OPENBIOS_MAC_OFFSET));
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}
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