61 lines
1.9 KiB
ArmAsm
61 lines
1.9 KiB
ArmAsm
/***************************************************************************
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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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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
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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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