/*- * Copyright (c) 1989, 1990 William F. Jolitz. * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: vector.s, 386BSD 0.1 unknown origin * $FreeBSD: src/sys/amd64/amd64/apic_vector.S,v 1.100 2004/05/24 12:08:56 bde Exp $ */ /* * Interrupt entry points for external interrupts triggered by I/O APICs * as well as IPI handlers. */ #include <machine/asmacros.h> #include <machine/apicreg.h> #include "assym.s" /* * Macros to create and destroy a trap frame. */ #define PUSH_FRAME \ subq $TF_RIP,%rsp ; /* skip dummy tf_err and tf_trapno */ \ testb $SEL_RPL_MASK,TF_CS(%rsp) ; /* come from kernel? */ \ jz 1f ; /* Yes, dont swapgs again */ \ swapgs ; \ 1: movq %rdi,TF_RDI(%rsp) ; \ movq %rsi,TF_RSI(%rsp) ; \ movq %rdx,TF_RDX(%rsp) ; \ movq %rcx,TF_RCX(%rsp) ; \ movq %r8,TF_R8(%rsp) ; \ movq %r9,TF_R9(%rsp) ; \ movq %rax,TF_RAX(%rsp) ; \ movq %rbx,TF_RBX(%rsp) ; \ movq %rbp,TF_RBP(%rsp) ; \ movq %r10,TF_R10(%rsp) ; \ movq %r11,TF_R11(%rsp) ; \ movq %r12,TF_R12(%rsp) ; \ movq %r13,TF_R13(%rsp) ; \ movq %r14,TF_R14(%rsp) ; \ movq %r15,TF_R15(%rsp) #define POP_FRAME \ movq TF_RDI(%rsp),%rdi ; \ movq TF_RSI(%rsp),%rsi ; \ movq TF_RDX(%rsp),%rdx ; \ movq TF_RCX(%rsp),%rcx ; \ movq TF_R8(%rsp),%r8 ; \ movq TF_R9(%rsp),%r9 ; \ movq TF_RAX(%rsp),%rax ; \ movq TF_RBX(%rsp),%rbx ; \ movq TF_RBP(%rsp),%rbp ; \ movq TF_R10(%rsp),%r10 ; \ movq TF_R11(%rsp),%r11 ; \ movq TF_R12(%rsp),%r12 ; \ movq TF_R13(%rsp),%r13 ; \ movq TF_R14(%rsp),%r14 ; \ movq TF_R15(%rsp),%r15 ; \ testb $SEL_RPL_MASK,TF_CS(%rsp) ; /* come from kernel? */ \ jz 1f ; /* keep kernel GS.base */ \ cli ; \ swapgs ; \ 1: addq $TF_RIP,%rsp /* skip over tf_err, tf_trapno */ /* * I/O Interrupt Entry Point. Rather than having one entry point for * each interrupt source, we use one entry point for each 32-bit word * in the ISR. The handler determines the highest bit set in the ISR, * translates that into a vector, and passes the vector to the * lapic_handle_intr() function. */ #define ISR_VEC(index, vec_name) \ .text ; \ SUPERALIGN_TEXT ; \ IDTVEC(vec_name) ; \ PUSH_FRAME ; \ FAKE_MCOUNT(TF_RIP(%rsp)) ; \ movq lapic, %rdx ; /* pointer to local APIC */ \ movl LA_ISR + 16 * (index)(%rdx), %eax ; /* load ISR */ \ bsrl %eax, %eax ; /* index of highset set bit in ISR */ \ jz 2f ; \ addl $(32 * index),%eax ; \ 1: ; \ movq %rax, %rdi ; /* pass the IRQ */ \ call lapic_handle_intr ; \ MEXITCOUNT ; \ jmp doreti ; \ 2: movl $-1, %eax ; /* send a vector of -1 */ \ jmp 1b /* * Handle "spurious INTerrupts". * Notes: * This is different than the "spurious INTerrupt" generated by an * 8259 PIC for missing INTs. See the APIC documentation for details. * This routine should NOT do an 'EOI' cycle. */ .text SUPERALIGN_TEXT IDTVEC(spuriousint) /* No EOI cycle used here */ iretq ISR_VEC(1, apic_isr1) ISR_VEC(2, apic_isr2) ISR_VEC(3, apic_isr3) ISR_VEC(4, apic_isr4) ISR_VEC(5, apic_isr5) ISR_VEC(6, apic_isr6) ISR_VEC(7, apic_isr7) #ifdef SMP /* * Global address space TLB shootdown. */ .text SUPERALIGN_TEXT IDTVEC(invltlb) pushq %rax movq %cr3, %rax /* invalidate the TLB */ movq %rax, %cr3 movq lapic, %rax movl $0, LA_EOI(%rax) /* End Of Interrupt to APIC */ lock incl smp_tlb_wait popq %rax iretq /* * Single page TLB shootdown */ .text SUPERALIGN_TEXT IDTVEC(invlpg) pushq %rax movq smp_tlb_addr1, %rax invlpg (%rax) /* invalidate single page */ movq lapic, %rax movl $0, LA_EOI(%rax) /* End Of Interrupt to APIC */ lock incl smp_tlb_wait popq %rax iretq /* * Page range TLB shootdown. */ .text SUPERALIGN_TEXT IDTVEC(invlrng) pushq %rax pushq %rdx movq smp_tlb_addr1, %rdx movq smp_tlb_addr2, %rax 1: invlpg (%rdx) /* invalidate single page */ addq $PAGE_SIZE, %rdx cmpq %rax, %rdx jb 1b movq lapic, %rax movl $0, LA_EOI(%rax) /* End Of Interrupt to APIC */ lock incl smp_tlb_wait popq %rdx popq %rax iretq /* * Forward hardclock to another CPU. Pushes a clockframe and calls * forwarded_hardclock(). */ .text SUPERALIGN_TEXT IDTVEC(hardclock) PUSH_FRAME movq lapic, %rdx movl $0, LA_EOI(%rdx) /* End Of Interrupt to APIC */ call forwarded_hardclock MEXITCOUNT jmp doreti /* * Forward statclock to another CPU. Pushes a clockframe and calls * forwarded_statclock(). */ .text SUPERALIGN_TEXT IDTVEC(statclock) PUSH_FRAME movq lapic, %rdx movl $0, LA_EOI(%rdx) /* End Of Interrupt to APIC */ FAKE_MCOUNT(TF_RIP(%rsp)) call forwarded_statclock MEXITCOUNT jmp doreti /* * Executed by a CPU when it receives an Xcpuast IPI from another CPU, * * The other CPU has already executed aston() or need_resched() on our * current process, so we simply need to ack the interrupt and return * via doreti to run ast(). */ .text SUPERALIGN_TEXT IDTVEC(cpuast) PUSH_FRAME movq lapic, %rdx movl $0, LA_EOI(%rdx) /* End Of Interrupt to APIC */ FAKE_MCOUNT(TF_RIP(%rsp)) MEXITCOUNT jmp doreti /* * Executed by a CPU when it receives an Xcpustop IPI from another CPU, * * - Signals its receipt. * - Waits for permission to restart. * - Signals its restart. */ .text SUPERALIGN_TEXT IDTVEC(cpustop) PUSH_FRAME movq lapic, %rax movl $0, LA_EOI(%rax) /* End Of Interrupt to APIC */ movl PCPU(CPUID), %eax imull $PCB_SIZE, %eax leaq stoppcbs(%rax), %rdi call savectx /* Save process context */ movl PCPU(CPUID), %eax lock btsl %eax, stopped_cpus /* stopped_cpus |= (1<<id) */ 1: btl %eax, started_cpus /* while (!(started_cpus & (1<<id))) */ jnc 1b lock btrl %eax, started_cpus /* started_cpus &= ~(1<<id) */ lock btrl %eax, stopped_cpus /* stopped_cpus &= ~(1<<id) */ test %eax, %eax jnz 2f movq cpustop_restartfunc, %rax testq %rax, %rax jz 2f movq $0, cpustop_restartfunc /* One-shot */ call *%rax 2: POP_FRAME iretq /* * Executed by a CPU when it receives a RENDEZVOUS IPI from another CPU. * * - Calls the generic rendezvous action function. */ .text SUPERALIGN_TEXT IDTVEC(rendezvous) PUSH_FRAME call smp_rendezvous_action movq lapic, %rax movl $0, LA_EOI(%rax) /* End Of Interrupt to APIC */ POP_FRAME /* Why not doreti? */ iretq #endif /* SMP */