linux/include/asm-arm/arch-mxc/uncompress.h
Quinn Jensen 03e5386e1e [ARM] 4530/1: MXC: fix elf_hwcap compile breakage as in iop13xx
MXC needs the same change as IOP.  See [ARM] 4494/1
or commit 7dea1b2006

An undefined reference to elf_hwcap prevents linkage, due
to changes made by f884b1cf57
and d1cbbd6b41

Removing processor.h removes the extern definition of
elf_hwcap, which fixes the link issue, but forgets cpu_relax().
So, instead, we'll call barrier() directly.

Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Ross Wille <wille@freescale.com>
Signed-off-by: Quinn Jensen <quinn.jensen@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-07-28 20:52:55 +01:00

78 lines
2 KiB
C

/*
* include/asm-arm/arch-mxc/uncompress.h
*
*
*
* Copyright (C) 1999 ARM Limited
* Copyright (C) Shane Nay (shane@minirl.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __ASM_ARCH_MXC_UNCOMPRESS_H__
#define __ASM_ARCH_MXC_UNCOMPRESS_H__
#define __MXC_BOOT_UNCOMPRESS
#include <asm/hardware.h>
#define UART(x) (*(volatile unsigned long *)(serial_port + (x)))
#define USR2 0x98
#define USR2_TXFE (1<<14)
#define TXR 0x40
#define UCR1 0x80
#define UCR1_UARTEN 1
/*
* The following code assumes the serial port has already been
* initialized by the bootloader. We search for the first enabled
* port in the most probable order. If you didn't setup a port in
* your bootloader then nothing will appear (which might be desired).
*
* This does not append a newline
*/
static void putc(int ch)
{
static unsigned long serial_port = 0;
if (unlikely(serial_port == 0)) {
do {
serial_port = UART1_BASE_ADDR;
if (UART(UCR1) & UCR1_UARTEN)
break;
serial_port = UART2_BASE_ADDR;
if (UART(UCR1) & UCR1_UARTEN)
break;
return;
} while (0);
}
while (!(UART(USR2) & USR2_TXFE))
barrier();
UART(TXR) = ch;
}
#define flush() do { } while (0)
/*
* nothing to do
*/
#define arch_decomp_setup()
#define arch_decomp_wdog()
#endif /* __ASM_ARCH_MXC_UNCOMPRESS_H__ */