69 lines
1.4 KiB
ArmAsm
69 lines
1.4 KiB
ArmAsm
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/*
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* include/asm-arm/arch-tcc83x/entry-macro.S
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*
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* Author : <linux@telechips.com>
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* Created: June 10, 2008
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* Description: Low-level IRQ helper macros for Telechips-based platforms
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*
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* Copyright (C) 2008-2009 Telechips
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <mach/hardware.h>
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#include <mach/irqs.h>
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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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.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
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ldr \base, =0xF2003000 @ base address of PIC registers
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@@ read MREQ register of PIC0
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mov \irqnr, #0
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ldr \irqstat, [\base, #0x00000014 ] @ lower 32 interrupts
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cmp \irqstat, #0
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bne 1001f
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@@ read MREQ register of PIC1
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ldr \irqstat, [\base, #0x00000094] @ upper 32 interrupts
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cmp \irqstat, #0
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beq 1002f
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mov \irqnr, #0x20
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1001:
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movs \tmp, \irqstat, lsl #16
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movne \irqstat, \tmp
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addeq \irqnr, \irqnr, #16
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movs \tmp, \irqstat, lsl #8
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movne \irqstat, \tmp
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addeq \irqnr, \irqnr, #8
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movs \tmp, \irqstat, lsl #4
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movne \irqstat, \tmp
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addeq \irqnr, \irqnr, #4
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movs \tmp, \irqstat, lsl #2
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movne \irqstat, \tmp
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addeq \irqnr, \irqnr, #2
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movs \tmp, \irqstat, lsl #1
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addeq \irqnr, \irqnr, #1
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orrs \base, \base, #1
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1002:
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@@ exit here, Z flag unset if IRQ
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.endm
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