1/* 2 * arch/arm/mach-ixp4xx/include/mach/entry-macro.S 3 * 4 * Low-level IRQ helper macros for IXP4xx-based platforms 5 * 6 * This file is licensed under the terms of the GNU General Public 7 * License version 2. This program is licensed "as is" without any 8 * warranty of any kind, whether express or implied. 9 */ 10#include <mach/hardware.h> 11 12 .macro get_irqnr_preamble, base, tmp 13 .endm 14 15 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp 16 ldr \irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP_OFFSET) 17 ldr \irqstat, [\irqstat] @ get interrupts 18 cmp \irqstat, #0 19 beq 1001f @ upper IRQ? 20 clz \irqnr, \irqstat 21 mov \base, #31 22 sub \irqnr, \base, \irqnr 23 b 1002f @ lower IRQ being 24 @ handled 25 261001: 27 /* 28 * IXP465/IXP435 has an upper IRQ status register 29 */ 30#if defined(CONFIG_CPU_IXP46X) || defined(CONFIG_CPU_IXP43X) 31 ldr \irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP2_OFFSET) 32 ldr \irqstat, [\irqstat] @ get upper interrupts 33 mov \irqnr, #63 34 clz \irqstat, \irqstat 35 cmp \irqstat, #32 36 subne \irqnr, \irqnr, \irqstat 37#endif 381002: 39 .endm 40 41 42