Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
56 lines
1.0 KiB
ArmAsm
56 lines
1.0 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* arch/arm/include/debug/8250.S
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*
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* Copyright (C) 1994-2013 Russell King
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*/
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#include <linux/serial_reg.h>
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.macro addruart, rp, rv, tmp
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ldr \rp, =CONFIG_DEBUG_UART_PHYS
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ldr \rv, =CONFIG_DEBUG_UART_VIRT
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.endm
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#ifdef CONFIG_DEBUG_UART_8250_WORD
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.macro store, rd, rx:vararg
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ARM_BE8(rev \rd, \rd)
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str \rd, \rx
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ARM_BE8(rev \rd, \rd)
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.endm
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.macro load, rd, rx:vararg
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ldr \rd, \rx
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ARM_BE8(rev \rd, \rd)
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.endm
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#else
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.macro store, rd, rx:vararg
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strb \rd, \rx
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.endm
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.macro load, rd, rx:vararg
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ldrb \rd, \rx
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.endm
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#endif
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#define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT
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.macro senduart,rd,rx
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store \rd, [\rx, #UART_TX << UART_SHIFT]
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.endm
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.macro busyuart,rd,rx
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1002: load \rd, [\rx, #UART_LSR << UART_SHIFT]
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and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
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teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
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bne 1002b
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.endm
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.macro waituarttxrdy,rd,rx
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.endm
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.macro waituartcts,rd,rx
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1001: load \rd, [\rx, #UART_MSR << UART_SHIFT]
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tst \rd, #UART_MSR_CTS
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beq 1001b
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.endm
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