From 5b39be4637bb795b2133dbee0eadbcc08bdd4134 Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Thu, 7 Jan 2010 08:59:26 +0900 Subject: ARM: Add common entry code for system with two VICs Add a common entry-macro-vic2.S for systems where there are two VICs so that the machine or platform directories just need to setup the correct information before including into their own entry-macro.S file. Since this code is from the S3C64XX project, we update the S3C64XX machine entry code to use this new header. Signed-off-by: Ben Dooks --- arch/arm/include/asm/entry-macro-vic2.S | 57 +++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 arch/arm/include/asm/entry-macro-vic2.S (limited to 'arch/arm/include') diff --git a/arch/arm/include/asm/entry-macro-vic2.S b/arch/arm/include/asm/entry-macro-vic2.S new file mode 100644 index 000000000000..3ceb85e43850 --- /dev/null +++ b/arch/arm/include/asm/entry-macro-vic2.S @@ -0,0 +1,57 @@ +/* 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 + * + * 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 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 + + .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 -- cgit v1.2.3