1/* 2 * arch/arm/mach-shark/include/mach/entry-macro.S 3 * 4 * Low-level IRQ helper macros for Shark platform 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 .macro get_irqnr_preamble, base, tmp 11 mov \base, #0xe0000000 12 .endm 13 14 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp 15 16 mov \irqstat, #0x0C 17 strb \irqstat, [\base, #0x20] @outb(0x0C, 0x20) /* Poll command */ 18 ldrb \irqnr, [\base, #0x20] @irq = inb(0x20) & 7 19 and \irqstat, \irqnr, #0x80 20 teq \irqstat, #0 21 beq 43f 22 and \irqnr, \irqnr, #7 23 teq \irqnr, #2 24 bne 44f 2543: mov \irqstat, #0x0C 26 strb \irqstat, [\base, #0xa0] @outb(0x0C, 0xA0) /* Poll command */ 27 ldrb \irqnr, [\base, #0xa0] @irq = (inb(0xA0) & 7) + 8 28 and \irqstat, \irqnr, #0x80 29 teq \irqstat, #0 30 beq 44f 31 and \irqnr, \irqnr, #7 32 add \irqnr, \irqnr, #8 3344: teq \irqstat, #0 34 .endm 35 36