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/* * arch/arm/mach-ixp4xx/include/mach/entry-macro.S * * Low-level IRQ helper macros for IXP4xx-based platforms * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #include <mach/hardware.h> .macro get_irqnr_preamble, base, tmp .endm .macro get_irqnr_and_base, irqnr, irqstat, base, tmp ldr \irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP_OFFSET) ldr \irqstat, [\irqstat] @ get interrupts cmp \irqstat, #0 beq 1001f @ upper IRQ? clz \irqnr, \irqstat mov \base, #31 sub \irqnr, \base, \irqnr b 1002f @ lower IRQ being @ handled 1001: /* * IXP465/IXP435 has an upper IRQ status register */ #if defined(CONFIG_CPU_IXP46X) || defined(CONFIG_CPU_IXP43X) ldr \irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP2_OFFSET) ldr \irqstat, [\irqstat] @ get upper interrupts mov \irqnr, #63 clz \irqstat, \irqstat cmp \irqstat, #32 subne \irqnr, \irqnr, \irqstat #endif 1002: .endm