| /* arch/arm/include/asm/entry-macro-vic2.S |
| * |
| * Originally arch/arm/mach-s3c6400/include/mach/entry-macro.S |
| * |
| * Copyright 2008 Openmoko, Inc. |
| * Copyright 2008 Simtec Electronics |
| * http://armlinux.simtec.co.uk/ |
| * Ben Dooks <ben@simtec.co.uk> |
| * |
| * Low-level IRQ helper macros for a device with two VICs |
| * |
| * 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. |
| */ |
| |
| /* This should be included from <mach/entry-macro.S> with the necessary |
| * defines for virtual addresses and IRQ bases for the two vics. |
| * |
| * The code needs the following defined: |
| * IRQ_VIC0_BASE IRQ number of VIC0's first IRQ |
| * IRQ_VIC1_BASE IRQ number of VIC1's first IRQ |
| * VA_VIC0 Virtual address of VIC0 |
| * VA_VIC1 Virtual address of VIC1 |
| * |
| * Note, code assumes VIC0's virtual address is an ARM immediate constant |
| * away from VIC1. |
| */ |
| |
| #include <asm/hardware/vic.h> |
| |
| .macro disable_fiq |
| .endm |
| |
| .macro get_irqnr_preamble, base, tmp |
| ldr \base, =VA_VIC0 |
| .endm |
| |
| .macro arch_ret_to_user, tmp1, tmp2 |
| .endm |
| |
| .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| |
| @ check the vic0 |
| mov \irqnr, #IRQ_VIC0_BASE + 31 |
| ldr \irqstat, [ \base, # VIC_IRQ_STATUS ] |
| teq \irqstat, #0 |
| |
| @ otherwise try vic1 |
| addeq \tmp, \base, #(VA_VIC1 - VA_VIC0) |
| addeq \irqnr, \irqnr, #(IRQ_VIC1_BASE - IRQ_VIC0_BASE) |
| ldreq \irqstat, [ \tmp, # VIC_IRQ_STATUS ] |
| teqeq \irqstat, #0 |
| |
| clzne \irqstat, \irqstat |
| subne \irqnr, \irqnr, \irqstat |
| .endm |
