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#ifndef _ASM_HW_IRQ_H
#define _ASM_HW_IRQ_H
/* (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar */
#include <xeno/config.h>
#include <asm/atomic.h>
#define SA_INTERRUPT 0x20000000
#define SA_SHIRQ 0x04000000
#define SA_NOPROFILE 0x02000000
#define SA_SAMPLE_RANDOM 0 /* Linux driver compatibility */
#define TIMER_IRQ 0
extern void disable_irq(unsigned int);
extern void disable_irq_nosync(unsigned int);
extern void enable_irq(unsigned int);
/*
* IDT vectors usable for external interrupt sources start
* at 0x20:
*/
#define FIRST_EXTERNAL_VECTOR 0x30
#define NR_IRQS (256 - FIRST_EXTERNAL_VECTOR)
#define HYPERVISOR_CALL_VECTOR 0x82
/*
* Vectors 0x30-0x3f are used for ISA interrupts.
*/
/*
* Special IRQ vectors used by the SMP architecture, 0xf0-0xff
*
* some of the following vectors are 'rare', they are merged
* into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
* TLB, reschedule and local APIC vectors are performance-critical.
*
* Vectors 0xf0-0xfa are free (reserved for future Linux use).
*/
#define SPURIOUS_APIC_VECTOR 0xff
#define ERROR_APIC_VECTOR 0xfe
#define INVALIDATE_TLB_VECTOR 0xfd
#define EVENT_CHECK_VECTOR 0xfc
#define CALL_FUNCTION_VECTOR 0xfb
#define KDB_VECTOR 0xfa
/*
* Local APIC timer IRQ vector is on a different priority level,
* to work around the 'lost local interrupt if more than 2 IRQ
* sources per level' errata.
*/
#define LOCAL_TIMER_VECTOR 0xef
/*
* First APIC vector available to drivers: (vectors 0x40-0xee)
* we start at 0x41 to spread out vectors evenly between priority
* levels. (0x82 is the syscall vector)
*/
#define FIRST_DEVICE_VECTOR 0x41
#define FIRST_SYSTEM_VECTOR 0xef
extern int irq_vector[NR_IRQS];
#define IO_APIC_VECTOR(irq) irq_vector[irq]
/*
* Various low-level irq details needed by irq.c, process.c,
* time.c, io_apic.c and smp.c
*
* Interrupt entry/exit code at both C and assembly level
*/
extern void mask_irq(unsigned int irq);
extern void unmask_irq(unsigned int irq);
extern void disable_8259A_irq(unsigned int irq);
extern void enable_8259A_irq(unsigned int irq);
extern int i8259A_irq_pending(unsigned int irq);
extern void make_8259A_irq(unsigned int irq);
extern void init_8259A(int aeoi);
extern void FASTCALL(send_IPI_self(int vector));
extern void init_VISWS_APIC_irqs(void);
extern void setup_IO_APIC(void);
extern void disable_IO_APIC(void);
extern void print_IO_APIC(void);
extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
extern void send_IPI(int dest, int vector);
extern unsigned long io_apic_irqs;
extern atomic_t irq_err_count;
extern atomic_t irq_mis_count;
extern char _stext, _etext;
#define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
#define __STR(x) #x
#define STR(x) __STR(x)
#define SAVE_ALL \
"cld\n\t" \
"pushl %gs\n\t" \
"pushl %fs\n\t" \
"pushl %es\n\t" \
"pushl %ds\n\t" \
"pushl %eax\n\t" \
"pushl %ebp\n\t" \
"pushl %edi\n\t" \
"pushl %esi\n\t" \
"pushl %edx\n\t" \
"pushl %ecx\n\t" \
"pushl %ebx\n\t" \
"movl $" STR(__HYPERVISOR_DS) ",%edx\n\t" \
"movl %edx,%ds\n\t" \
"movl %edx,%es\n\t"
#define IRQ_NAME2(nr) nr##_interrupt(void)
#define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
#define GET_CURRENT \
"movl %esp, %ebx\n\t" \
"andl $-8192, %ebx\n\t"
/*
* SMP has a few special interrupts for IPI messages
*/
/* there is a second layer of macro just to get the symbolic
name for the vector evaluated. This change is for RTLinux */
#define BUILD_SMP_INTERRUPT(x,v) XBUILD_SMP_INTERRUPT(x,v)
#define XBUILD_SMP_INTERRUPT(x,v)\
asmlinkage void x(void); \
asmlinkage void call_##x(void); \
__asm__( \
"\n"__ALIGN_STR"\n" \
SYMBOL_NAME_STR(x) ":\n\t" \
"pushl $"#v"-256\n\t" \
SAVE_ALL \
SYMBOL_NAME_STR(call_##x)":\n\t" \
"call "SYMBOL_NAME_STR(smp_##x)"\n\t" \
"jmp ret_from_intr\n");
#define BUILD_SMP_TIMER_INTERRUPT(x,v) XBUILD_SMP_TIMER_INTERRUPT(x,v)
#define XBUILD_SMP_TIMER_INTERRUPT(x,v) \
asmlinkage void x(struct pt_regs * regs); \
asmlinkage void call_##x(void); \
__asm__( \
"\n"__ALIGN_STR"\n" \
SYMBOL_NAME_STR(x) ":\n\t" \
"pushl $"#v"-256\n\t" \
SAVE_ALL \
"movl %esp,%eax\n\t" \
"pushl %eax\n\t" \
SYMBOL_NAME_STR(call_##x)":\n\t" \
"call "SYMBOL_NAME_STR(smp_##x)"\n\t" \
"addl $4,%esp\n\t" \
"jmp ret_from_intr\n");
#define BUILD_COMMON_IRQ() \
asmlinkage void call_do_IRQ(void); \
__asm__( \
"\n" __ALIGN_STR"\n" \
"common_interrupt:\n\t" \
SAVE_ALL \
SYMBOL_NAME_STR(call_do_IRQ)":\n\t" \
"call " SYMBOL_NAME_STR(do_IRQ) "\n\t" \
"jmp ret_from_intr\n");
/*
* subtle. orig_eax is used by the signal code to distinct between
* system calls and interrupted 'random user-space'. Thus we have
* to put a negative value into orig_eax here. (the problem is that
* both system calls and IRQs want to have small integer numbers in
* orig_eax, and the syscall code has won the optimization conflict ;)
*
* Subtle as a pigs ear. VY
*/
#define BUILD_IRQ(nr) \
asmlinkage void IRQ_NAME(nr); \
__asm__( \
"\n"__ALIGN_STR"\n" \
SYMBOL_NAME_STR(IRQ) #nr "_interrupt:\n\t" \
"pushl $"#nr"-256\n\t" \
"jmp common_interrupt");
extern unsigned long prof_cpu_mask;
extern unsigned int * prof_buffer;
extern unsigned long prof_len;
extern unsigned long prof_shift;
#include <xeno/irq.h>
#ifdef CONFIG_SMP /*more of this file should probably be ifdefed SMP */
static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {
if (IO_APIC_IRQ(i))
send_IPI_self(IO_APIC_VECTOR(i));
}
#else
static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
#endif
#endif /* _ASM_HW_IRQ_H */
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