47 lines
821 B
ArmAsm
47 lines
821 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/***************************************************************************
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* Copyright (C) 2013 by Henrik Nilsson *
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* henrik.nilsson@bytequest.se *
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***************************************************************************/
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.text
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.syntax unified
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.arch armv7-m
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.thumb
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.thumb_func
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.align 4
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/* Inputs:
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* r0 buffer address
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* r1 NAND data address (byte wide)
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* r2 buffer length
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*/
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read:
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ldrb r3, [r1]
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strb r3, [r0], #1
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subs r2, r2, #1
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bne read
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done_read:
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bkpt #0
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.align 4
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/* Inputs:
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* r0 NAND data address (byte wide)
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* r1 buffer address
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* r2 buffer length
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*/
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write:
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ldrb r3, [r1], #1
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strb r3, [r0]
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subs r2, r2, #1
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bne write
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done_write:
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bkpt #0
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.end
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