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9c92ab6191
Based on 1 normalized pattern(s): this software is licensed under the terms of the gnu general public license version 2 as published by the free software foundation and may be copied distributed and modified under those terms this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 285 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
46 lines
998 B
ArmAsm
46 lines
998 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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*
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* Copyright (C) 2007 Google, Inc.
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* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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* Author: Brian Swetland <swetland@google.com>
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*/
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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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.macro senduart, rd, rx
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ARM_BE8(rev \rd, \rd )
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@ Write the 1 character to UARTDM_TF
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str \rd, [\rx, #0x70]
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.endm
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.macro waituart, rd, rx
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@ check for TX_EMT in UARTDM_SR
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ldr \rd, [\rx, #0x08]
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ARM_BE8(rev \rd, \rd )
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tst \rd, #0x08
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bne 1002f
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@ wait for TXREADY in UARTDM_ISR
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1001: ldr \rd, [\rx, #0x14]
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ARM_BE8(rev \rd, \rd )
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tst \rd, #0x80
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beq 1001b
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1002:
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@ Clear TX_READY by writing to the UARTDM_CR register
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mov \rd, #0x300
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ARM_BE8(rev \rd, \rd )
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str \rd, [\rx, #0x10]
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@ Write 0x1 to NCF register
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mov \rd, #0x1
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ARM_BE8(rev \rd, \rd )
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str \rd, [\rx, #0x40]
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@ UARTDM reg. Read to induce delay
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ldr \rd, [\rx, #0x08]
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.endm
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.macro busyuart, rd, rx
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.endm
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