Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\i8259.c Create Date:2022-07-28 07:40:46
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:probe_8259A

Proto:static int probe_8259A(void)

Type:int

Parameter:Nothing

304  probe_val = ~(1 << 8259A PIC related value )
313  raw_spin_lock_irqsave( & i8259A_lock, flags)
315  Basic port I/O
316  Basic port I/O
317  new_val = inb(PIC_MASTER_IMR)
318  If new_val != probe_val Then
319  printk(formational "Using NULL legacy PIC\n")
320  legacy_pic = & null_legacy_pic
323  raw_spin_unlock_irqrestore( & i8259A_lock, flags)
324  Return nr_legacy_irqs()