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我正在使用N450板(Intel Atom),Eclipse作爲IDE,我在C和AT編碼中使用匯編代碼。APIC定時器代碼不工作?
我嘗試在週期模式,並與我ISR_55
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
的ISR使用APIC定時器就像是對現在:
isr0x55:
cli
sti
iret
我可以看到定時器計數變化值(I檢查寄存器0xFEE00390),但ISR永遠不會被調用(我已經把一箇中斷點!!!)。
我忘了設置一些東西嗎?我怎麼能確定每件事情都是正確的?
恭喜! –
10x Alex,...... –