Assembly APIC定时器代码dosen';不行?
我使用N450板(Intel Atom),Eclipse作为IDE,我用C和AT&T编写汇编代码 我尝试在周期模式和ISR_55上使用APIC定时器Assembly APIC定时器代码dosen';不行?,assembly,Assembly,我使用N450板(Intel Atom),Eclipse作为IDE,我用C和AT&T编写汇编代码 我尝试在周期模式和ISR_55上使用APIC定时器 InitTickISR: push %ebp //save the context to swith back mov %esp,%ebp // Divide Configuration Register (for Timer) addr : FEE0 03E0 <- movl $0xFEE
InitTickISR:
push %ebp //save the context to swith back
mov %esp,%ebp
// Divide Configuration Register (for Timer) addr : FEE0 03E0 <-
movl $0xFEE003E0, %eax
movl $0x3, (%eax)//0x3:Divided by 16, 0xA :divide by 128
// Initial Count addr : FEE0 0380 <- 0x1000
movl $0xFEE00380,%eax
movl $0x100, (%eax)
// LVT(Local Vector Table) Timer Register (FEE0 0320H) -- Interrupt 0x55
movl $0xFEE00320, %eax
movl $0x20055, (%eax)//2: periodic mode, 01:one shot
//55: interruption
// Enable local APIC addr : FEE0 00F0 <- 0x100
movl $0xFEE000F0, %eax
movl $0x100, (%eax)
pop %ebp //Return to the calling function
ret
我可以看到计时器计数改变值(我检查了寄存器0xFEE00390),但从未调用ISR(我在其中放了一个断点!!!)
我忘了做点什么了吗?如何确保所有设置都正确?我已通过使用EOI寄存器重置ISR寄存器解决了问题。我已通过使用EOI寄存器重置ISR寄存器解决了问题
isr0x55:
cli
sti
iret