summaryrefslogtreecommitdiff
path: root/arch/mips/mipssim/sim_int.c
diff options
context:
space:
mode:
authorDaniel Schaeffer <daniel@dschaeffer.localdomain>2008-01-30 15:42:41 -0500
committerDaniel Schaeffer <daniel@dschaeffer.localdomain>2008-01-30 15:42:41 -0500
commit648b932d8cf61f38d08a84e6388036b22766c2df (patch)
tree3c48859a194482b645b93c1bead3bcc323327fb7 /arch/mips/mipssim/sim_int.c
parent2506ae0663e660d8dc7624fcdae1814c8ee3d10a (diff)
parentbbf25010f1a6b761914430f5fca081ec8c7accd1 (diff)
Merge branch '2.6.23' into 2.6.22.6-imx27
Conflicts: Documentation/kernel-parameters.txt Makefile arch/arm/Kconfig arch/arm/Makefile arch/arm/mach-mx3/Kconfig arch/arm/mach-mx3/Makefile arch/arm/mach-mx3/mm.c arch/arm/mach-mx3/mx31ads.c arch/arm/mm/Kconfig arch/arm/plat-mxc/Kconfig arch/arm/plat-mxc/Makefile arch/arm/plat-mxc/irq.c block/cfq-iosched.c drivers/ata/ahci.c drivers/ata/libata-core.c drivers/char/watchdog/Kconfig drivers/firewire/fw-sbp2.c drivers/md/dm-crypt.c drivers/media/video/pwc/pwc-if.c drivers/mmc/card/Kconfig drivers/mmc/card/queue.c drivers/mmc/core/Makefile drivers/mmc/core/bus.c drivers/mmc/core/core.c drivers/mmc/core/host.c drivers/mmc/core/mmc.c drivers/mmc/core/sd.c drivers/mmc/core/sd_ops.c drivers/mmc/host/at91_mci.c drivers/mmc/host/sdhci.c drivers/net/bonding/bond_main.c drivers/net/fec.c drivers/net/forcedeth.c drivers/net/r8169.c drivers/net/sky2.c drivers/rtc/Kconfig drivers/rtc/Makefile drivers/spi/Kconfig drivers/spi/Makefile drivers/usb/gadget/Makefile drivers/usb/gadget/gadget_chips.h drivers/usb/host/ehci.h drivers/video/logo/logo.c drivers/w1/slaves/Makefile fs/9p/conv.c fs/direct-io.c fs/exec.c fs/ocfs2/file.c fs/signalfd.c fs/sysfs/file.c include/asm-arm/arch-mxc/dma.h include/asm-arm/arch-mxc/entry-macro.S include/asm-arm/arch-mxc/hardware.h include/asm-arm/arch-mxc/io.h include/asm-arm/arch-mxc/irqs.h include/asm-arm/arch-mxc/memory.h include/asm-arm/arch-mxc/mx31.h include/asm-arm/arch-mxc/mxc.h include/asm-arm/arch-mxc/system.h include/asm-arm/arch-mxc/timex.h include/asm-arm/arch-mxc/uncompress.h include/asm-arm/arch-mxc/vmalloc.h include/linux/fsl_devices.h include/linux/ioprio.h kernel/lockdep_proc.c kernel/signal.c mm/hugetlb.c mm/readahead.c net/bluetooth/rfcomm/tty.c net/bridge/br_device.c net/core/dev.c net/ieee80211/softmac/ieee80211softmac_assoc.c net/ieee80211/softmac/ieee80211softmac_wx.c net/ipv4/netfilter/nf_conntrack_proto_icmp.c net/ipv4/tcp_input.c net/netfilter/nf_conntrack_proto_sctp.c
Diffstat (limited to 'arch/mips/mipssim/sim_int.c')
-rw-r--r--arch/mips/mipssim/sim_int.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/arch/mips/mipssim/sim_int.c b/arch/mips/mipssim/sim_int.c
new file mode 100644
index 000000000000..5cbc3509ab52
--- /dev/null
+++ b/arch/mips/mipssim/sim_int.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 1999, 2005 MIPS Technologies, Inc. All rights reserved.
+ *
+ * This program is free software; you can distribute it and/or modify it
+ * under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ */
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <asm/mips-boards/simint.h>
+#include <asm/irq_cpu.h>
+
+static inline int clz(unsigned long x)
+{
+ __asm__ (
+ " .set push \n"
+ " .set mips32 \n"
+ " clz %0, %1 \n"
+ " .set pop \n"
+ : "=r" (x)
+ : "r" (x));
+
+ return x;
+}
+
+/*
+ * Version of ffs that only looks at bits 12..15.
+ */
+static inline unsigned int irq_ffs(unsigned int pending)
+{
+#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
+ return -clz(pending) + 31 - CAUSEB_IP;
+#else
+ unsigned int a0 = 7;
+ unsigned int t0;
+
+ t0 = s0 & 0xf000;
+ t0 = t0 < 1;
+ t0 = t0 << 2;
+ a0 = a0 - t0;
+ s0 = s0 << t0;
+
+ t0 = s0 & 0xc000;
+ t0 = t0 < 1;
+ t0 = t0 << 1;
+ a0 = a0 - t0;
+ s0 = s0 << t0;
+
+ t0 = s0 & 0x8000;
+ t0 = t0 < 1;
+ /* t0 = t0 << 2; */
+ a0 = a0 - t0;
+ /* s0 = s0 << t0; */
+
+ return a0;
+#endif
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+ int irq;
+
+ irq = irq_ffs(pending);
+
+ if (irq > 0)
+ do_IRQ(MIPS_CPU_IRQ_BASE + irq);
+ else
+ spurious_interrupt();
+}
+
+void __init arch_init_irq(void)
+{
+ mips_cpu_irq_init();
+}