{install|remove}_io_interrupt_handler() now correctly handle the B_NO_ENABLE_COUNTER flag.

Lots of cleanup:
- moved B_NO_ENABLE_COUNTER flag definition out of int.h to KernelExport.h, as it's
  described in the BeBook (although it's probably not really used that often :))
- int.c no longer has any platform dependent code (+ 0x20 on interrupt numbers is gone);
  it's now entirely handled in the arch/x86/ section.
- the io_vectors[] is now statically initialized, instead of allocated from the heap
- removed {install|remove}_interrupt_handler(); they weren't that useful, arch_smp_init()
  is now calling install_io_interrupt_handler() correctly instead
- introduced a new arch_int.h header file that currently contains NUM_IO_VECTORS only
  (though on x86, it also has ARCH_INTERRUPT_BASE == 0x20).
- changed the return type from {install|remove}_io_interrupt_handler() from "long" to
  "status_t"
- rearranged and cleaned the PIC initialization code, made the PIC code more prominent
- changed comments that talk about a non existing 8239 (the PIC chip is actually 8259)
- moved arch/x86/interrupts.h to the source directory, as it's not used outside
- added BeOS compatible interrupts_enabled() function, that should replace our
  equivalent (and private) are_interrupts_enabled()


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12477 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/arch/int.h

@@ -1,15 +1,16 @@
 /*
-** Copyright 2002-2004, The Haiku Team. All rights reserved.
-** Distributed under the terms of the Haiku License.
-**
-** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
-** Distributed under the terms of the NewOS License.
-*/
+ * Copyright 2002-2005, Axel Dörfler, [email protected]. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
+ * Distributed under the terms of the NewOS License.
+ */
 #ifndef KERNEL_ARCH_INT_H
 #define KERNEL_ARCH_INT_H
 
 
 #include <boot/kernel_args.h>
+#include <arch_int.h>
 
 
 #ifdef __cplusplus

headers/private/kernel/arch/ppc/arch_int.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright 2005, Axel Dörfler, [email protected]. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _KERNEL_ARCH_PPC_INT_H
+#define _KERNEL_ARCH_PPC_INT_H
+
+
+#define NUM_IO_VECTORS	256
+
+
+#endif /* _KERNEL_ARCH_PPC_INT_H */

headers/private/kernel/arch/x86/arch_int.h

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2005, Axel Dörfler, [email protected]. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _KERNEL_ARCH_x86_INT_H
+#define _KERNEL_ARCH_x86_INT_H
+
+
+#define ARCH_INTERRUPT_BASE	0x20
+#define NUM_IO_VECTORS		(256 - ARCH_INTERRUPT_BASE)
+
+
+#endif /* _KERNEL_ARCH_x86_INT_H */

headers/private/kernel/arch/x86/interrupts.h

@@ -1,21 +0,0 @@
-/* 
-** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
-** Distributed under the terms of the NewOS License.
-*/
-#ifndef _NEWOS_KERNEL_ARCH_I386_INTERRUPTS_H
-#define _NEWOS_KERNEL_ARCH_I386_INTERRUPTS_H
-
-void trap0();void trap1();void trap2();void trap3();void trap4();void trap5();
-void trap6();void trap7();void trap9();void trap10();void trap11();
-void trap12();void trap13();void trap14();void trap16();void trap17();void trap18();
-void trap32();void trap33();void trap34();void trap35();void trap36();void trap37();
-void trap38();void trap39();void trap40();void trap41();void trap42();void trap43();
-void trap44();void trap45();void trap46();void trap47();
-
-void double_fault();	// int 8
-
-void trap99();
-
-void trap251();void trap252();void trap253();void trap254();void trap255();
-#endif
-

headers/private/kernel/int.h

@@ -15,10 +15,6 @@
 struct kernel_args;
 
 
-/* adds the handler but don't change whether or not the interrupt is currently enabled */
-#define B_NO_ENABLE_COUNTER	1
-
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -26,8 +22,8 @@ extern "C" {
 status_t int_init(struct kernel_args *args);
 status_t int_init_post_vm(struct kernel_args *args);
 int int_io_interrupt_handler(int vector);
-status_t install_interrupt_handler(long vector, interrupt_handler, void *data);
-status_t remove_interrupt_handler(long vector, interrupt_handler, void *data);
+
+bool interrupts_enabled(void);
 
 static inline void
 enable_interrupts(void)