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https://github.com/AsahiLinux/u-boot
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6eb15e50f4
ARCv2 cores may have built-in SLC (System Level Cache, AKA L2-cache). This change adds functions required for controlling SLC: * slc_enable/disable * slc_flush/invalidate For now we just disable SLC to escape DMA coherency issues until either: * SLC flush/invalidate is supported in DMA APIin U-Boot * hardware DMA coherency is implemented (that might be board specific so probably we'll need to have a separate Kconfig option for controlling SLC explicitly) Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/*
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _ASM_ARC_ARCREGS_H
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#define _ASM_ARC_ARCREGS_H
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#include <asm/cache.h>
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/*
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* ARC architecture has additional address space - auxiliary registers.
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* These registers are mostly used for configuration purposes.
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* These registers are not memory mapped and special commands are used for
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* access: "lr"/"sr".
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*/
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#define ARC_AUX_IDENTITY 0x04
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#define ARC_AUX_STATUS32 0x0a
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/* Instruction cache related auxiliary registers */
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#define ARC_AUX_IC_IVIC 0x10
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#define ARC_AUX_IC_CTRL 0x11
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#define ARC_AUX_IC_IVIL 0x19
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#if (CONFIG_ARC_MMU_VER == 3)
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#define ARC_AUX_IC_PTAG 0x1E
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#endif
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#define ARC_BCR_IC_BUILD 0x77
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/* Timer related auxiliary registers */
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#define ARC_AUX_TIMER0_CNT 0x21 /* Timer 0 count */
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#define ARC_AUX_TIMER0_CTRL 0x22 /* Timer 0 control */
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#define ARC_AUX_TIMER0_LIMIT 0x23 /* Timer 0 limit */
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#define ARC_AUX_INTR_VEC_BASE 0x25
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/* Data cache related auxiliary registers */
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#define ARC_AUX_DC_IVDC 0x47
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#define ARC_AUX_DC_CTRL 0x48
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#define ARC_AUX_DC_IVDL 0x4A
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#define ARC_AUX_DC_FLSH 0x4B
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#define ARC_AUX_DC_FLDL 0x4C
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#if (CONFIG_ARC_MMU_VER == 3)
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#define ARC_AUX_DC_PTAG 0x5C
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#endif
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#define ARC_BCR_DC_BUILD 0x72
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#define ARC_BCR_SLC 0xce
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#define ARC_AUX_SLC_CONTROL 0x903
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#define ARC_AUX_SLC_FLUSH 0x904
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#define ARC_AUX_SLC_INVALIDATE 0x905
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#ifndef __ASSEMBLY__
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/* Accessors for auxiliary registers */
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#define read_aux_reg(reg) __builtin_arc_lr(reg)
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/* gcc builtin sr needs reg param to be long immediate */
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#define write_aux_reg(reg_immed, val) \
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__builtin_arc_sr((unsigned int)val, reg_immed)
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_ARC_ARCREGS_H */
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