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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ed9b949f55
Make NOMMU-mode work with base addresses other than 0xC0000000 by:
(1) Giving the code that sets up the protection registers the right address
in __sdram_base. Rather than being hard coded to 0xC0000000, the value
of __page_offset is obtained from the linker script.
(2) Eliminate the check in __switch_to() that verifies the current thread
info is in the 0xCxxxxxxx region.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
51 lines
1.1 KiB
PHP
51 lines
1.1 KiB
PHP
/* head.inc: head common definitions -*- asm -*-
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*
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* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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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; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#if defined(CONFIG_MB93090_MB00)
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#define LED_ADDR (0x21200000+4)
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.macro LEDS val
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sethi.p %hi(0xFFC00030),gr3
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setlo %lo(0xFFC00030),gr3
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lduh @(gr3,gr0),gr3
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andicc gr3,#0x100,gr0,icc0
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bne icc0,0,999f
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setlos #~\val,gr3
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st gr3,@(gr30,gr0)
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membar
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dcf @(gr30,gr0)
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999:
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.endm
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#elif defined(CONFIG_MB93093_PDK)
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#define LED_ADDR (0x20000023)
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.macro LEDS val
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setlos #\val,gr3
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stb gr3,@(gr30,gr0)
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membar
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.endm
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#else
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#define LED_ADDR 0
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.macro LEDS val
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.endm
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#endif
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#ifdef CONFIG_MMU
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__sdram_base = 0x00000000 /* base address to which SDRAM relocated */
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#else
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__sdram_base = __page_offset /* base address to which SDRAM relocated */
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#endif
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