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52c543f90c
This patch adds the foundation pieces for the Freescale MXC platforms, including i.MX2 and i.MX3 based systems. The bare-bones MX31 support in this patch boots to the rootdev panic with 8250 serial console configured "console=ttyS0,115200". It assumes that Redboot is the boot loader. Signed-off-by: Quinn Jensen <quinn.jensen@freescale.com> Acked-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
40 lines
1.1 KiB
ArmAsm
40 lines
1.1 KiB
ArmAsm
/*
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* Copyright (C) 2007 Lennert Buytenhek <buytenh@wantstofly.org>
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* Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
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*/
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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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@ this macro disables fast irq (not implemented)
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.macro disable_fiq
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.endm
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.macro get_irqnr_preamble, base, tmp
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.endm
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.macro arch_ret_to_user, tmp1, tmp2
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.endm
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@ this macro checks which interrupt occured
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@ and returns its number in irqnr
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@ and returns if an interrupt occured in irqstat
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.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
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ldr \base, =AVIC_IO_ADDRESS(AVIC_BASE_ADDR)
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@ Load offset & priority of the highest priority
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@ interrupt pending from AVIC_NIVECSR
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ldr \irqstat, [\base, #0x40]
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@ Shift to get the decoded IRQ number, using ASR so
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@ 'no interrupt pending' becomes 0xffffffff
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mov \irqnr, \irqstat, asr #16
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@ set zero flag if IRQ + 1 == 0
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adds \tmp, \irqnr, #1
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.endm
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@ irq priority table (not used)
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.macro irq_prio_table
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.endm
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