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authorBen Dooks <ben-linux@fluff.org>2010-01-07 02:59:26 +0300
committerBen Dooks <ben-linux@fluff.org>2010-01-15 11:10:14 +0300
commit5b39be4637bb795b2133dbee0eadbcc08bdd4134 (patch)
treef55baa4bf30212075ba45d89b78ccf2e265467bc /arch/arm/include
parent51022cf6591ae2945960d034788bdeffa28cde13 (diff)
downloadlinux-5b39be4637bb795b2133dbee0eadbcc08bdd4134.tar.xz
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 <asm/entry-macro-vic2.S> 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 <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/include')
-rw-r--r--arch/arm/include/asm/entry-macro-vic2.S57
1 files changed, 57 insertions, 0 deletions
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 <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