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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
152 lines
2.7 KiB
C
152 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2005 - 2013 Tensilica Inc.
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* Copyright (C) 2014 - 2016 Cadence Design Systems Inc.
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*/
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#ifndef _XTENSA_ASMMACRO_H
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#define _XTENSA_ASMMACRO_H
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#include <asm/arch/core.h>
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/*
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* Function entry and return macros for supported ABIs.
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*/
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#if defined(__XTENSA_WINDOWED_ABI__)
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#define abi_entry entry sp, 16
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#define abi_ret retw
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#elif defined(__XTENSA_CALL0_ABI__)
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#define abi_entry
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#define abi_ret ret
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#else
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#error Unsupported Xtensa ABI
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#endif
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/*
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* Some little helpers for loops. Use zero-overhead-loops
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* where applicable and if supported by the processor.
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*
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* __loopi ar, at, size, inc
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* ar register initialized with the start address
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* at scratch register used by macro
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* size size immediate value
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* inc increment
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*
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* __loops ar, as, at, inc_log2[, mask_log2][, cond][, ncond]
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* ar register initialized with the start address
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* as register initialized with the size
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* at scratch register use by macro
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* inc_log2 increment [in log2]
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* mask_log2 mask [in log2]
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* cond true condition (used in loop'cond')
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* ncond false condition (used in b'ncond')
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*
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* __loop as
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* restart loop. 'as' register must not have been modified!
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*
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* __endla ar, as, incr
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* ar start address (modified)
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* as scratch register used by __loops/__loopi macros or
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* end address used by __loopt macro
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* inc increment
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*/
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#if XCHAL_HAVE_LOOPS
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.macro __loopi ar, at, size, incr
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movi \at, ((\size + \incr - 1) / (\incr))
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loop \at, 99f
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.endm
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.macro __loops ar, as, at, incr_log2, mask_log2, cond, ncond
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.ifgt \incr_log2 - 1
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addi \at, \as, (1 << \incr_log2) - 1
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.ifnc \mask_log2,
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extui \at, \at, \incr_log2, \mask_log2
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.else
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srli \at, \at, \incr_log2
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.endif
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.endif
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loop\cond \at, 99f
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.endm
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.macro __loopt ar, as, at, incr_log2
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sub \at, \as, \ar
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.ifgt \incr_log2 - 1
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addi \at, \at, (1 << \incr_log2) - 1
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srli \at, \at, \incr_log2
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.endif
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loop \at, 99f
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.endm
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.macro __loop as
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loop \as, 99f
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.endm
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.macro __endl ar, as
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99:
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.endm
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#else
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.macro __loopi ar, at, size, incr
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movi \at, ((\size + \incr - 1) / (\incr))
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addi \at, \ar, \size
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98:
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.endm
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.macro __loops ar, as, at, incr_log2, mask_log2, cond, ncond
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.ifnc \mask_log2,
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extui \at, \as, \incr_log2, \mask_log2
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.else
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.ifnc \ncond,
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srli \at, \as, \incr_log2
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.endif
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.endif
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.ifnc \ncond,
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b\ncond \at, 99f
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.endif
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.ifnc \mask_log2,
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slli \at, \at, \incr_log2
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add \at, \ar, \at
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.else
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add \at, \ar, \as
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.endif
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98:
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.endm
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.macro __loopt ar, as, at, incr_log2
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98:
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.endm
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.macro __loop as
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98:
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.endm
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.macro __endl ar, as
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bltu \ar, \as, 98b
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99:
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.endm
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#endif
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.macro __endla ar, as, incr
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addi \ar, \ar, \incr
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__endl \ar \as
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.endm
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#endif /* _XTENSA_ASMMACRO_H */
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