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54 lines
1.2 KiB
ArmAsm
54 lines
1.2 KiB
ArmAsm
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/*
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* include/asm-arm/arch-ixp2000/entry-macro.S
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*
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* Low-level IRQ helper macros for IXP2000-based platforms
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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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.macro disable_fiq
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.endm
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.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
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mov \irqnr, #0x0 @clear out irqnr as default
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mov \base, #0xfe000000
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orr \base, \base, #0x00e00000
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orr \base, \base, #0x08
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ldr \irqstat, [\base] @ get interrupts
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cmp \irqstat, #0
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beq 1001f
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clz \irqnr, \irqstat
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mov \base, #31
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subs \irqnr, \base, \irqnr
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/*
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* We handle PCIA and PCIB here so we don't have an
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* extra layer of code just to check these two bits.
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*/
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cmp \irqnr, #IRQ_IXP2000_PCI
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bne 1001f
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mov \base, #0xfe000000
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orr \base, \base, #0x00c00000
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orr \base, \base, #0x00000100
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orr \base, \base, #0x00000058
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ldr \irqstat, [\base]
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mov \tmp, #(1<<26)
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tst \irqstat, \tmp
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movne \irqnr, #IRQ_IXP2000_PCIA
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bne 1001f
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mov \tmp, #(1<<27)
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tst \irqstat, \tmp
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movne \irqnr, #IRQ_IXP2000_PCIB
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1001:
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.endm
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