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c18f65816e
Adds functions to read and write IXP4xx "feature" (aka "fuse") bits, containing information about available/enabled CPU features. The uncompress.h included by boot/compressed/misc.c resides in a different space than rest of the kernel and thus can't use asm/hardware.h (including asm/arch/cpu.h - which, in turn, may use EXPORTed symbol "processor_id"). Posted to linux-arm-kernel on 2 Dec 2007 and revised. Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/*
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* include/asm-arm/arch-ixp4xx/uncompress.h
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*
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* Copyright (C) 2002 Intel Corporation.
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* Copyright (C) 2003-2004 MontaVista Software, Inc.
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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 version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#ifndef _ARCH_UNCOMPRESS_H_
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#define _ARCH_UNCOMPRESS_H_
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#include "ixp4xx-regs.h"
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#include <asm/mach-types.h>
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#include <linux/serial_reg.h>
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#define TX_DONE (UART_LSR_TEMT|UART_LSR_THRE)
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static volatile u32* uart_base;
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static inline void putc(int c)
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{
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/* Check THRE and TEMT bits before we transmit the character.
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*/
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while ((uart_base[UART_LSR] & TX_DONE) != TX_DONE)
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barrier();
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*uart_base = c;
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}
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static void flush(void)
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{
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}
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static __inline__ void __arch_decomp_setup(unsigned long arch_id)
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{
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/*
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* Some boards are using UART2 as console
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*/
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if (machine_is_adi_coyote() || machine_is_gtwx5715() ||
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machine_is_gateway7001() || machine_is_wg302v2())
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uart_base = (volatile u32*) IXP4XX_UART2_BASE_PHYS;
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else
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uart_base = (volatile u32*) IXP4XX_UART1_BASE_PHYS;
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}
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/*
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* arch_id is a variable in decompress_kernel()
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*/
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#define arch_decomp_setup() __arch_decomp_setup(arch_id)
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#define arch_decomp_wdog()
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#endif
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