ARM: mach-shmobile: Run-time IRQ handler for INTCA
Break-out INTC specific IRQ demux code from the file
entry-macro-intc.S and register during run-time.
Covers sh7367, sh7377 and sh7372.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile
index ab100e4..e385ef0 100644
--- a/arch/arm/mach-shmobile/Makefile
+++ b/arch/arm/mach-shmobile/Makefile
@@ -18,6 +18,11 @@
pfc-$(CONFIG_ARCH_SH7372) += pfc-sh7372.o
pfc-$(CONFIG_ARCH_SH73A0) += pfc-sh73a0.o
+# IRQ objects
+obj-$(CONFIG_ARCH_SH7367) += entry-intc.o
+obj-$(CONFIG_ARCH_SH7377) += entry-intc.o
+obj-$(CONFIG_ARCH_SH7372) += entry-intc.o
+
# Board objects
obj-$(CONFIG_MACH_G3EVM) += board-g3evm.o
obj-$(CONFIG_MACH_G4EVM) += board-g4evm.o
diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index 86edc77..cd79d7c 100644
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -1361,6 +1361,7 @@
MACHINE_START(AP4EVB, "ap4evb")
.map_io = ap4evb_map_io,
.init_irq = sh7372_init_irq,
+ .handle_irq = shmobile_handle_irq_intc,
.init_machine = ap4evb_init,
.timer = &ap4evb_timer,
MACHINE_END
diff --git a/arch/arm/mach-shmobile/board-g3evm.c b/arch/arm/mach-shmobile/board-g3evm.c
index 3b83d63..686b304 100644
--- a/arch/arm/mach-shmobile/board-g3evm.c
+++ b/arch/arm/mach-shmobile/board-g3evm.c
@@ -367,6 +367,7 @@
MACHINE_START(G3EVM, "g3evm")
.map_io = g3evm_map_io,
.init_irq = sh7367_init_irq,
+ .handle_irq = shmobile_handle_irq_intc,
.init_machine = g3evm_init,
.timer = &g3evm_timer,
MACHINE_END
diff --git a/arch/arm/mach-shmobile/board-g4evm.c b/arch/arm/mach-shmobile/board-g4evm.c
index 5b3b582..c13f012 100644
--- a/arch/arm/mach-shmobile/board-g4evm.c
+++ b/arch/arm/mach-shmobile/board-g4evm.c
@@ -394,6 +394,7 @@
MACHINE_START(G4EVM, "g4evm")
.map_io = g4evm_map_io,
.init_irq = sh7377_init_irq,
+ .handle_irq = shmobile_handle_irq_intc,
.init_machine = g4evm_init,
.timer = &g4evm_timer,
MACHINE_END
diff --git a/arch/arm/mach-shmobile/board-mackerel.c b/arch/arm/mach-shmobile/board-mackerel.c
index 6a5ce9a..5bcf5c1 100644
--- a/arch/arm/mach-shmobile/board-mackerel.c
+++ b/arch/arm/mach-shmobile/board-mackerel.c
@@ -1194,6 +1194,7 @@
MACHINE_START(MACKEREL, "mackerel")
.map_io = mackerel_map_io,
.init_irq = sh7372_init_irq,
+ .handle_irq = shmobile_handle_irq_intc,
.init_machine = mackerel_init,
.timer = &mackerel_timer,
MACHINE_END
diff --git a/arch/arm/mach-shmobile/entry-intc.S b/arch/arm/mach-shmobile/entry-intc.S
new file mode 100644
index 0000000..cac0a7a
--- /dev/null
+++ b/arch/arm/mach-shmobile/entry-intc.S
@@ -0,0 +1,57 @@
+/*
+ * ARM Interrupt demux handler using INTC
+ *
+ * Copyright (C) 2010 Magnus Damm
+ * Copyright (C) 2008 Renesas Solutions Corp.
+ *
+ * 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 <asm/entry-macro-multi.S>
+
+#define INTCA_BASE 0xe6980000
+#define INTFLGA_OFFS 0x00000018 /* accept pending interrupt */
+#define INTEVTA_OFFS 0x00000020 /* vector number of accepted interrupt */
+#define INTLVLA_OFFS 0x00000030 /* priority level of accepted interrupt */
+#define INTLVLB_OFFS 0x00000034 /* previous priority level */
+
+ .macro get_irqnr_preamble, base, tmp
+ ldr \base, =INTCA_BASE
+ .endm
+
+ .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
+ /* The single INTFLGA read access below results in the following:
+ *
+ * 1. INTLVLB is updated with old priority value from INTLVLA
+ * 2. Highest priority interrupt is accepted
+ * 3. INTLVLA is updated to contain priority of accepted interrupt
+ * 4. Accepted interrupt vector is stored in INTFLGA and INTEVTA
+ */
+ ldr \irqnr, [\base, #INTFLGA_OFFS]
+
+ /* Restore INTLVLA with the value saved in INTLVLB.
+ * This is required to support interrupt priorities properly.
+ */
+ ldrb \tmp, [\base, #INTLVLB_OFFS]
+ strb \tmp, [\base, #INTLVLA_OFFS]
+
+ /* Handle invalid vector number case */
+ cmp \irqnr, #0
+ beq 1000f
+
+ /* Convert vector to irq number, same as the evt2irq() macro */
+ lsr \irqnr, \irqnr, #0x5
+ subs \irqnr, \irqnr, #16
+
+1000:
+ .endm
+
+ .macro test_for_ipi, irqnr, irqstat, base, tmp
+ .endm
+
+ .macro test_for_ltirq, irqnr, irqstat, base, tmp
+ .endm
+
+ arch_irq_handler shmobile_handle_irq_intc
diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h
index 49ac8eb..ab75183 100644
--- a/arch/arm/mach-shmobile/include/mach/common.h
+++ b/arch/arm/mach-shmobile/include/mach/common.h
@@ -5,6 +5,7 @@
extern void shmobile_setup_console(void);
struct clk;
extern int clk_init(void);
+extern void shmobile_handle_irq_intc(struct pt_regs *);
extern void sh7367_init_irq(void);
extern void sh7367_add_early_devices(void);