80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
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/*
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* include/asm-arm/arch-mxc/uncompress.h
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*
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*
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*
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* Copyright (C) 1999 ARM Limited
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* Copyright (C) Shane Nay (shane@minirl.com)
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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 Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __ASM_ARCH_MXC_UNCOMPRESS_H__
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#define __ASM_ARCH_MXC_UNCOMPRESS_H__
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#define __MXC_BOOT_UNCOMPRESS
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#include <asm/hardware.h>
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#include <asm/processor.h>
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#define UART(x) (*(volatile unsigned long *)(serial_port + (x)))
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#define USR2 0x98
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#define USR2_TXFE (1<<14)
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#define TXR 0x40
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#define UCR1 0x80
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#define UCR1_UARTEN 1
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/*
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* The following code assumes the serial port has already been
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* initialized by the bootloader. We search for the first enabled
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* port in the most probable order. If you didn't setup a port in
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* your bootloader then nothing will appear (which might be desired).
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*
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* This does not append a newline
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*/
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static void putc(int ch)
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{
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static unsigned long serial_port = 0;
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if (unlikely(serial_port == 0)) {
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do {
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serial_port = UART1_BASE_ADDR;
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if (UART(UCR1) & UCR1_UARTEN)
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break;
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serial_port = UART2_BASE_ADDR;
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if (UART(UCR1) & UCR1_UARTEN)
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break;
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return;
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} while (0);
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}
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while (!(UART(USR2) & USR2_TXFE))
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cpu_relax();
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UART(TXR) = ch;
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}
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#define flush() do { } while (0)
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/*
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* nothing to do
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*/
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#define arch_decomp_setup()
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#define arch_decomp_wdog()
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#endif /* __ASM_ARCH_MXC_UNCOMPRESS_H__ */
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