[PATCH v3 08/18] ARM: clps711x: Implement usage "MULTI_IRQ_HANDLER" kernel option for a platform
Alexander Shiyan
shc_work at mail.ru
Sat Nov 17 08:57:14 EST 2012
Signed-off-by: Alexander Shiyan <shc_work at mail.ru>
---
arch/arm/Kconfig | 1 +
arch/arm/mach-clps711x/autcpu12.c | 1 +
arch/arm/mach-clps711x/cdb89712.c | 1 +
arch/arm/mach-clps711x/clep7312.c | 3 +-
arch/arm/mach-clps711x/common.c | 45 +++++++++++++++++--
arch/arm/mach-clps711x/common.h | 3 +-
arch/arm/mach-clps711x/edb7211.c | 1 +
arch/arm/mach-clps711x/fortunet.c | 1 +
arch/arm/mach-clps711x/include/mach/entry-macro.S | 51 ---------------------
arch/arm/mach-clps711x/p720t.c | 1 +
10 files changed, 50 insertions(+), 58 deletions(-)
delete mode 100644 arch/arm/mach-clps711x/include/mach/entry-macro.S
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 896f6bb..f3f1dd3 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -377,6 +377,7 @@ config ARCH_CLPS711X
select COMMON_CLK
select CPU_ARM720T
select GENERIC_CLOCKEVENTS
+ select MULTI_IRQ_HANDLER
select NEED_MACH_MEMORY_H
select SPARSE_IRQ
help
diff --git a/arch/arm/mach-clps711x/autcpu12.c b/arch/arm/mach-clps711x/autcpu12.c
index b90a316..3de1955 100644
--- a/arch/arm/mach-clps711x/autcpu12.c
+++ b/arch/arm/mach-clps711x/autcpu12.c
@@ -75,6 +75,7 @@ MACHINE_START(AUTCPU12, "autronix autcpu12")
.init_irq = clps711x_init_irq,
.timer = &clps711x_timer,
.init_machine = autcpu12_init,
+ .handle_irq = clps711x_handle_irq,
.restart = clps711x_restart,
MACHINE_END
diff --git a/arch/arm/mach-clps711x/cdb89712.c b/arch/arm/mach-clps711x/cdb89712.c
index 133794c..60900dd 100644
--- a/arch/arm/mach-clps711x/cdb89712.c
+++ b/arch/arm/mach-clps711x/cdb89712.c
@@ -142,5 +142,6 @@ MACHINE_START(CDB89712, "Cirrus-CDB89712")
.init_irq = clps711x_init_irq,
.timer = &clps711x_timer,
.init_machine = cdb89712_init,
+ .handle_irq = clps711x_handle_irq,
.restart = clps711x_restart,
MACHINE_END
diff --git a/arch/arm/mach-clps711x/clep7312.c b/arch/arm/mach-clps711x/clep7312.c
index be776c5..0b32a48 100644
--- a/arch/arm/mach-clps711x/clep7312.c
+++ b/arch/arm/mach-clps711x/clep7312.c
@@ -33,7 +33,6 @@ fixup_clep7312(struct tag *tags, char **cmdline, struct meminfo *mi)
mi->bank[0].size = 0x01000000;
}
-
MACHINE_START(CLEP7212, "Cirrus Logic 7212/7312")
/* Maintainer: Nobody */
.atag_offset = 0x0100,
@@ -42,6 +41,6 @@ MACHINE_START(CLEP7212, "Cirrus Logic 7212/7312")
.map_io = clps711x_map_io,
.init_irq = clps711x_init_irq,
.timer = &clps711x_timer,
+ .handle_irq = clps711x_handle_irq,
.restart = clps711x_restart,
MACHINE_END
-
diff --git a/arch/arm/mach-clps711x/common.c b/arch/arm/mach-clps711x/common.c
index 286d6e6..0842024 100644
--- a/arch/arm/mach-clps711x/common.c
+++ b/arch/arm/mach-clps711x/common.c
@@ -29,6 +29,7 @@
#include <linux/clockchips.h>
#include <linux/clk-provider.h>
+#include <asm/exception.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <asm/system_misc.h>
@@ -134,13 +135,11 @@ static struct irq_chip int2_chip = {
.irq_unmask = int2_unmask,
};
-struct clps711x_irqdesc {
+static struct {
int nr;
struct irq_chip *chip;
irq_flow_handler_t handle;
-};
-
-static struct clps711x_irqdesc clps711x_irqdescs[] __initdata = {
+} clps711x_irqdescs[] __initdata = {
{ IRQ_CSINT, &int1_chip, handle_fasteoi_irq, },
{ IRQ_EINT1, &int1_chip, handle_level_irq, },
{ IRQ_EINT2, &int1_chip, handle_level_irq, },
@@ -191,6 +190,44 @@ void __init clps711x_init_irq(void)
}
}
+inline u32 fls16(u32 x)
+{
+ u32 r = 15;
+
+ if (!(x & 0xff00)) {
+ x <<= 8;
+ r -= 8;
+ }
+ if (!(x & 0xf000)) {
+ x <<= 4;
+ r -= 4;
+ }
+ if (!(x & 0xc000)) {
+ x <<= 2;
+ r -= 2;
+ }
+ if (!(x & 0x8000))
+ r--;
+
+ return r;
+}
+
+asmlinkage void __exception_irq_entry clps711x_handle_irq(struct pt_regs *regs)
+{
+ u32 irqstat;
+ void __iomem *base = CLPS711X_VIRT_BASE;
+
+ irqstat = readl_relaxed(base + INTSR1) & readl_relaxed(base + INTMR1);
+ if (irqstat) {
+ handle_IRQ(fls16(irqstat), regs);
+ return;
+ }
+
+ irqstat = readl_relaxed(base + INTSR2) & readl_relaxed(base + INTMR2);
+ if (likely(irqstat))
+ handle_IRQ(fls16(irqstat) + 16, regs);
+}
+
static void clps711x_clockevent_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
diff --git a/arch/arm/mach-clps711x/common.h b/arch/arm/mach-clps711x/common.h
index 28b1701..3c7f12c 100644
--- a/arch/arm/mach-clps711x/common.h
+++ b/arch/arm/mach-clps711x/common.h
@@ -12,5 +12,6 @@ struct sys_timer;
extern void clps711x_map_io(void);
extern void clps711x_init_irq(void);
-extern struct sys_timer clps711x_timer;
+extern void clps711x_handle_irq(struct pt_regs *regs);
extern void clps711x_restart(char mode, const char *cmd);
+extern struct sys_timer clps711x_timer;
diff --git a/arch/arm/mach-clps711x/edb7211.c b/arch/arm/mach-clps711x/edb7211.c
index 7b161dd..cc32a65 100644
--- a/arch/arm/mach-clps711x/edb7211.c
+++ b/arch/arm/mach-clps711x/edb7211.c
@@ -98,5 +98,6 @@ MACHINE_START(EDB7211, "CL-EDB7211 (EP7211 eval board)")
.init_irq = clps711x_init_irq,
.timer = &clps711x_timer,
.init_machine = edb7211_init,
+ .handle_irq = clps711x_handle_irq,
.restart = clps711x_restart,
MACHINE_END
diff --git a/arch/arm/mach-clps711x/fortunet.c b/arch/arm/mach-clps711x/fortunet.c
index a5c0816..7d01255 100644
--- a/arch/arm/mach-clps711x/fortunet.c
+++ b/arch/arm/mach-clps711x/fortunet.c
@@ -79,5 +79,6 @@ MACHINE_START(FORTUNET, "ARM-FortuNet")
.map_io = clps711x_map_io,
.init_irq = clps711x_init_irq,
.timer = &clps711x_timer,
+ .handle_irq = clps711x_handle_irq,
.restart = clps711x_restart,
MACHINE_END
diff --git a/arch/arm/mach-clps711x/include/mach/entry-macro.S b/arch/arm/mach-clps711x/include/mach/entry-macro.S
deleted file mode 100644
index 56e5c2c..0000000
--- a/arch/arm/mach-clps711x/include/mach/entry-macro.S
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * arch/arm/mach-clps711x/include/mach/entry-macro.S
- *
- * Low-level IRQ helper macros for CLPS711X-based 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>
-
- .macro get_irqnr_preamble, base, tmp
- .endm
-
-#if (INTSR2 - INTSR1) != (INTMR2 - INTMR1)
-#error INTSR stride != INTMR stride
-#endif
-
- .macro get_irqnr_and_base, irqnr, stat, base, mask
- mov \base, #CLPS711X_VIRT_BASE
- ldr \stat, [\base, #INTSR1]
- ldr \mask, [\base, #INTMR1]
- mov \irqnr, #4
- mov \mask, \mask, lsl #16
- and \stat, \stat, \mask, lsr #16
- movs \stat, \stat, lsr #4
- bne 1001f
-
- add \base, \base, #INTSR2 - INTSR1
- ldr \stat, [\base, #INTSR1]
- ldr \mask, [\base, #INTMR1]
- mov \irqnr, #16
- mov \mask, \mask, lsl #16
- and \stat, \stat, \mask, lsr #16
-
-1001: tst \stat, #255
- addeq \irqnr, \irqnr, #8
- moveq \stat, \stat, lsr #8
- tst \stat, #15
- addeq \irqnr, \irqnr, #4
- moveq \stat, \stat, lsr #4
- tst \stat, #3
- addeq \irqnr, \irqnr, #2
- moveq \stat, \stat, lsr #2
- tst \stat, #1
- addeq \irqnr, \irqnr, #1
- moveq \stat, \stat, lsr #1
- tst \stat, #1 @ bit 0 should be set
- .endm
-
-
diff --git a/arch/arm/mach-clps711x/p720t.c b/arch/arm/mach-clps711x/p720t.c
index fbe7552..a58a058 100644
--- a/arch/arm/mach-clps711x/p720t.c
+++ b/arch/arm/mach-clps711x/p720t.c
@@ -142,5 +142,6 @@ MACHINE_START(P720T, "ARM-Prospector720T")
.timer = &clps711x_timer,
.init_machine = p720t_init,
.init_late = p720t_init_late,
+ .handle_irq = clps711x_handle_irq,
.restart = clps711x_restart,
MACHINE_END
--
1.7.8.6
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