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authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 09:13:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 09:13:19 -0700
commit636d17427b1ef0e97bd9df9b3b0e0f314ff889d3 (patch)
treef573602c1a78e9140c36e220c47675b79af1c270 /arch/arm/mach-s5pv310/include/mach/entry-macro.S
parentlib/decompress_bunzip2.c: fix checkstack warning (diff)
parentMerge branches 'master' and 'devel' into for-linus (diff)
downloadlinux-dev-636d17427b1ef0e97bd9df9b3b0e0f314ff889d3.tar.xz
linux-dev-636d17427b1ef0e97bd9df9b3b0e0f314ff889d3.zip
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (226 commits) ARM: 6323/1: cam60: don't use __init for cam60_spi_{flash_platform_data,partitions} ARM: 6324/1: cam60: move cam60_spi_devices to .init.data ARM: 6322/1: imx/pca100: Fix name of spi platform data ARM: 6321/1: fix syntax error in main Kconfig file ARM: 6297/1: move U300 timer to dynamic clock lookup ARM: 6296/1: clock U300 intcon and timer properly ARM: 6295/1: fix U300 apb_pclk split ARM: 6306/1: fix inverted MMC card detect in U300 ARM: 6299/1: errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID ARM: 6294/1: etm: do a dummy read from OSSRR during initialization ARM: 6292/1: coresight: add ETM management registers ARM: 6288/1: ftrace: document mcount formats ARM: 6287/1: ftrace: clean up mcount assembly indentation ARM: 6286/1: fix Thumb-2 decompressor broken by "Auto calculate ZRELADDR" ARM: 6281/1: video/imxfb.c: allow usage without BACKLIGHT_CLASS_DEVICE ARM: 6280/1: imx: Fix build failure when including <mach/gpio.h> without <linux/spinlock.h> ARM: S5PV210: Fix on missing s3c-sdhci card detection method for hsmmc3 ARM: S5P: Fix on missing S5P_DEV_FIMC in plat-s5p/Kconfig ARM: S5PV210: Override FIMC driver name on Aquila board ARM: S5PC100: enable FIMC on SMDKC100 ... Fix up conflicts in arch/arm/mach-{s5pc100,s5pv210}/cpu.c due to different subsystem 'setname' calls, and trivial port types in include/linux/serial_core.h
Diffstat (limited to 'arch/arm/mach-s5pv310/include/mach/entry-macro.S')
-rw-r--r--arch/arm/mach-s5pv310/include/mach/entry-macro.S84
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/arm/mach-s5pv310/include/mach/entry-macro.S b/arch/arm/mach-s5pv310/include/mach/entry-macro.S
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index 000000000000..e600e1d522df
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+++ b/arch/arm/mach-s5pv310/include/mach/entry-macro.S
@@ -0,0 +1,84 @@
+/* arch/arm/mach-s5pv310/include/mach/entry-macro.S
+ *
+ * Cloned from arch/arm/mach-realview/include/mach/entry-macro.S
+ *
+ * Low-level IRQ helper macros for S5PV310 platforms
+ *
+ * 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.
+*/
+
+#include <mach/hardware.h>
+#include <asm/hardware/gic.h>
+
+ .macro disable_fiq
+ .endm
+
+ .macro get_irqnr_preamble, base, tmp
+ ldr \base, =gic_cpu_base_addr
+ ldr \base, [\base]
+ .endm
+
+ .macro arch_ret_to_user, tmp1, tmp2
+ .endm
+
+ /*
+ * The interrupt numbering scheme is defined in the
+ * interrupt controller spec. To wit:
+ *
+ * Interrupts 0-15 are IPI
+ * 16-28 are reserved
+ * 29-31 are local. We allow 30 to be used for the watchdog.
+ * 32-1020 are global
+ * 1021-1022 are reserved
+ * 1023 is "spurious" (no interrupt)
+ *
+ * For now, we ignore all local interrupts so only return an interrupt if it's
+ * between 30 and 1020. The test_for_ipi routine below will pick up on IPIs.
+ *
+ * A simple read from the controller will tell us the number of the highest
+ * priority enabled interrupt. We then just need to check whether it is in the
+ * valid range for an IRQ (30-1020 inclusive).
+ */
+
+ .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
+
+ ldr \irqstat, [\base, #GIC_CPU_INTACK] /* bits 12-10 = src CPU, 9-0 = int # */
+
+ ldr \tmp, =1021
+
+ bic \irqnr, \irqstat, #0x1c00
+
+ cmp \irqnr, #29
+ cmpcc \irqnr, \irqnr
+ cmpne \irqnr, \tmp
+ cmpcs \irqnr, \irqnr
+ addne \irqnr, \irqnr, #32
+
+ .endm
+
+ /* We assume that irqstat (the raw value of the IRQ acknowledge
+ * register) is preserved from the macro above.
+ * If there is an IPI, we immediately signal end of interrupt on the
+ * controller, since this requires the original irqstat value which
+ * we won't easily be able to recreate later.
+ */
+
+ .macro test_for_ipi, irqnr, irqstat, base, tmp
+ bic \irqnr, \irqstat, #0x1c00
+ cmp \irqnr, #16
+ strcc \irqstat, [\base, #GIC_CPU_EOI]
+ cmpcs \irqnr, \irqnr
+ .endm
+
+ /* As above, this assumes that irqstat and base are preserved.. */
+
+ .macro test_for_ltirq, irqnr, irqstat, base, tmp
+ bic \irqnr, \irqstat, #0x1c00
+ mov \tmp, #0
+ cmp \irqnr, #29
+ moveq \tmp, #1
+ streq \irqstat, [\base, #GIC_CPU_EOI]
+ cmp \tmp, #0
+ .endm