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Date: Tue, 9 Sep 2008 22:46:15 +0400
From: Cyrill Gorcunov <gorcunov@...il.com>
To: Ingo Molnar <mingo@...e.hu>
Cc: "H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>,
"Maciej W. Rozycki" <macro@...ux-mips.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: io-apic - get rid of __DO_ACTION macro
Replace __DO_ACTION macro with io_apic_modify_irq function.
This allow us to 'grep' definitions being hided by
the macro, ie the following:
__unmask_IO_APIC_irq
__mask_IO_APIC_irq
__mask_and_edge_IO_APIC_irq
__unmask_and_level_IO_APIC_irq
Also I removed R parameter which was to define offset inside
route table but always being zero for now and I don't think
if it ever will be other then that.
Signed-off-by: Cyrill Gorcunov <gorcunov@...il.com>
---
Please review. This modification doesn't map object file into the
same former state 'cause of 'for(entry)' cycle form changed and
new mask 'mask_and_not' added to be able to fill register with
pure zeros - ie clear register completely.
Any comments are quite welcome!
Index: linux-2.6.git/arch/x86/kernel/io_apic.c
===================================================================
--- linux-2.6.git.orig/arch/x86/kernel/io_apic.c 2008-09-09 22:27:57.000000000 +0400
+++ linux-2.6.git/arch/x86/kernel/io_apic.c 2008-09-09 22:34:03.000000000 +0400
@@ -643,65 +643,66 @@ static void __init replace_pin_at_irq(un
add_pin_to_irq(irq, newapic, newpin);
}
-#define __DO_ACTION(R, ACTION_ENABLE, ACTION_DISABLE, FINAL) \
- \
-{ \
- int pin; \
- struct irq_cfg *cfg; \
- struct irq_pin_list *entry; \
- \
- cfg = irq_cfg(irq); \
- entry = cfg->irq_2_pin; \
- for (;;) { \
- unsigned int reg; \
- if (!entry) \
- break; \
- pin = entry->pin; \
- reg = io_apic_read(entry->apic, 0x10 + R + pin*2); \
- reg ACTION_DISABLE; \
- reg ACTION_ENABLE; \
- io_apic_modify(entry->apic, 0x10 + R + pin*2, reg); \
- FINAL; \
- if (!entry->next) \
- break; \
- entry = entry->next; \
- } \
-}
-
-#define DO_ACTION(name,R, ACTION_ENABLE, ACTION_DISABLE, FINAL) \
- \
- static void name##_IO_APIC_irq (unsigned int irq) \
- __DO_ACTION(R, ACTION_ENABLE, ACTION_DISABLE, FINAL)
+static inline void io_apic_modify_irq(unsigned int irq,
+ int mask_and, int mask_or,
+ int mask_and_not, int read_after_mod)
+{
+ int pin;
+ struct irq_cfg *cfg;
+ struct irq_pin_list *entry;
-/* mask = 0 */
-DO_ACTION(__unmask, 0, |= 0, &= ~IO_APIC_REDIR_MASKED, )
+ cfg = irq_cfg(irq);
+ for (entry = cfg->irq_2_pin; entry != NULL; entry = entry->next) {
+ unsigned int reg;
+ pin = entry->pin;
+ reg = io_apic_read(entry->apic, 0x10 + pin * 2);
+ if (mask_and)
+ reg &= mask_and;
+ if (mask_or)
+ reg |= mask_or;
+ if (mask_and_not)
+ reg &= !mask_and_not;
+ io_apic_modify(entry->apic, 0x10 + pin * 2, reg);
+ if (read_after_mod) {
+ /*
+ * Synchronize the IO-APIC and the CPU by doing
+ * a dummy read from the IO-APIC
+ */
+ struct io_apic __iomem *io_apic;
+ io_apic = io_apic_base(entry->apic);
+ readl(&io_apic->data);
+ }
+ }
+}
-#ifdef CONFIG_X86_64
-/*
- * Synchronize the IO-APIC and the CPU by doing
- * a dummy read from the IO-APIC
- */
-static inline void io_apic_sync(unsigned int apic)
+static void __unmask_IO_APIC_irq(unsigned int irq)
{
- struct io_apic __iomem *io_apic = io_apic_base(apic);
- readl(&io_apic->data);
+ io_apic_modify_irq(irq, ~IO_APIC_REDIR_MASKED, 0, 0, 0);
}
-/* mask = 1 */
-DO_ACTION(__mask, 0, |= IO_APIC_REDIR_MASKED, &= ~0, io_apic_sync(entry->apic))
-
-#else
-
-/* mask = 1 */
-DO_ACTION(__mask, 0, |= IO_APIC_REDIR_MASKED, &= ~0, )
-
-/* mask = 1, trigger = 0 */
-DO_ACTION(__mask_and_edge, 0, |= IO_APIC_REDIR_MASKED, &= ~IO_APIC_REDIR_LEVEL_TRIGGER, )
+#ifdef CONFIG_X86_64
+static void __mask_IO_APIC_irq(unsigned int irq)
+{
+ io_apic_modify_irq(irq, ~0, IO_APIC_REDIR_MASKED, 0, 1);
+}
+#else /* CONFIG_X86_32 */
+static void __mask_IO_APIC_irq(unsigned int irq)
+{
+ io_apic_modify_irq(irq, ~0, IO_APIC_REDIR_MASKED, 0, 0);
+}
-/* mask = 0, trigger = 1 */
-DO_ACTION(__unmask_and_level, 0, |= IO_APIC_REDIR_LEVEL_TRIGGER, &= ~IO_APIC_REDIR_MASKED, )
+static void __mask_and_edge_IO_APIC_irq(unsigned int irq)
+{
+ io_apic_modify_irq(irq, ~IO_APIC_REDIR_LEVEL_TRIGGER,
+ IO_APIC_REDIR_MASKED, 0, 0);
+}
-#endif
+static void __unmask_and_level_IO_APIC_irq(unsigned int irq)
+{
+ io_apic_modify_irq(irq, ~IO_APIC_REDIR_MASKED,
+ IO_APIC_REDIR_LEVEL_TRIGGER, 0, 0);
+}
+#endif /* CONFIG_X86_32 */
static void mask_IO_APIC_irq (unsigned int irq)
{
--
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