/* * linux/include/asm/hw_irq.h * * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar * * moved some of the old arch/i386/kernel/irq.h to here. VY * * IRQ/IPI changes taken from work by Thomas Radke * */ //#include #include #include #include #include //#include /* * IDT vectors usable for external interrupt sources start * at 0x20: */ #define FIRST_EXTERNAL_VECTOR 0x20 #define SYSCALL_VECTOR 0x80 /* * Vectors 0x20-0x2f 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 RESCHEDULE_VECTOR 0xfc #define CALL_FUNCTION_VECTOR 0xfb /* * 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 0x30-0xee) * we start at 0x31 to spread out vectors evenly between priority * levels. (0x80 is the syscall vector) */ #define FIRST_DEVICE_VECTOR 0x31 #define FIRST_SYSTEM_VECTOR 0xef 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 %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 $0x18,%edx\n\t" \ "movl %edx,%ds\n\t" \ "movl %edx,%es\n\t" #define RESTORE_ALL \ "popl %ebx; \t\n" \ "popl %ecx; \t\n" \ "popl %edx; \t\n" \ "popl %esi; \t\n" \ "popl %edi; \t\n" \ "popl %ebp; \t\n" \ "popl %eax; \t\n" \ "popl %ds; \t\n" \ "popl %es; \t\n" \ "addl $4,%esp;\t\n" \ "iret\t\n" #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) \ asmlinkage void x(void); \ __asm__( \ "\n"__ALIGN_STR"\n" \ SYMBOL_NAME_STR(x) ":\n\t" \ "pushl $5\n\t" \ SAVE_ALL \ "pushl $ret_from_intr\n\t" \ "jmp "SYMBOL_NAME_STR(do_IRQ)"\n\t" \ "jmp ret_from_intr\n"); #define BUILD_SMP_TIMER_INTERRUPT(x,v) \ asmlinkage void x(struct pt_regs * regs); \ __asm__( \ "\n"__ALIGN_STR"\n" \ SYMBOL_NAME_STR(x) ":\n\t" \ "pushl $5\n\t" \ SAVE_ALL \ "movl %esp,%eax\n\t" \ "pushl %eax\n\t" \ "call "SYMBOL_NAME_STR(do_IRQ)"\n\t" \ "addl $4,%esp\n\t" \ "jmp ret_from_intr\n"); #define BUILD_COMMON_IRQ() \ __asm__( \ "\n" __ALIGN_STR"\n" \ "common_interrupt:\n\t" \ SAVE_ALL \ "call "SYMBOL_NAME_STR(do_IRQ)"\n\t" \ RESTORE_ALL \ "iret \n\t"); #define BUILD_STEP_INT() \ asmlinkage void stepbystep_interrupt(void); \ __asm__( \ "\n" __ALIGN_STR"\n" \ "stepbystep_interrupt:\n\t" \ "pushl %eax\n\t" \ SAVE_ALL \ "rdtsc \n\t" \ "movl %eax,(breakpoint_end_time) \n\t" \ "movl %edx,(breakpoint_end_time+4) \n\t" \ "call "SYMBOL_NAME_STR(StepbyStep_Handler)"\n\t" \ "rdtsc \n\t" \ "movl %eax,(breakpoint_start_time) \n\t" \ "movl %edx,(breakpoint_start_time+4) \n\t" \ RESTORE_ALL \ "iret \n\t"); #define BUILD_BREAKPOINT_INT() \ asmlinkage void breakpoint_interrupt(void); \ __asm__( \ "\n" __ALIGN_STR"\n" \ "breakpoint_interrupt:\n\t" \ "pushl %eax\n\t" \ SAVE_ALL \ "rdtsc \n\t" \ "movl %eax,(breakpoint_end_time) \n\t" \ "movl %edx,(breakpoint_end_time+4) \n\t" \ "call "SYMBOL_NAME_STR(Breakpoint_Handler)"\n\t" \ "rdtsc \n\t" \ "movl %eax,(breakpoint_start_time) \n\t" \ "movl %edx,(breakpoint_start_time+4) \n\t" \ RESTORE_ALL \ "iret \n\t"); #define BUILD_RET_FROM_INTR() \ __asm__( \ "\n" __ALIGN_STR"\n" \ "ret_from_intr:\n" \ " movb $0x20,%al\n\t" \ " outb %al,$0x20\n\t" \ RESTORE_ALL \ " \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 DEF_DEFAULT_IRQ() \ asmlinkage void default_interrupt(void); \ __asm__( \ "\n"__ALIGN_STR"\n" \ "default_interrupt:\n\t" \ "iret \n\t"); #define BUILD_INT(nr) \ asmlinkage void IRQ##nr##_int_int(void); \ __asm__( \ "\n"__ALIGN_STR"\n" \ SYMBOL_NAME_STR(IRQ) #nr "_int_int: \n\t" \ SAVE_ALL \ " movl $0x61,%eax \n\t" \ " addl $"#nr",%eax \n\t" \ " movl $0x10,%ecx \n\t" \ " movl $0xb8000,%edi \n\t" \ " rep stosb \n\t" \ RESTORE_ALL \ " int $0x3 \n\t" \ " hlt \n\t" \ " \n\t" \ "iret \n\t"); #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 \n\t"); // External Declaration // extern void set_intr_gate(unsigned int n, void *addr); extern void set_trap_gate(unsigned int n, void *addr);