函数逻辑报告 |
Source Code:arch\x86\kernel\apic\apic.c |
Create Date:2022-07-27 09:26:21 |
| Last Modify:2020-03-16 21:21:31 | Copyright©Brick |
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函数名称：This function sets up the local APIC timer, with a timeout of* 'clocks' APIC bus clock. During calibration we actually call* this function twice on the boot CPU, once with a bogus timeout* value, second time for real. The other (noncalibrating) CPUs
函数原型：static void __setup_APIC_LVTT(unsigned int clocks, int oneshot, int irqen)
返回类型：void
参数：
| 类型 | 参数 | 名称 |
|---|---|---|
| unsigned int | clocks | |
| int | oneshot | |
| int | irqen |
| 335 | 如果非oneshot则lvtt_value或等于APIC_LVT_TIMER_PERIODIC |
| 340 | 如果非Check, if the APIC is integrated or a separate chip则lvtt_value或等于SET_APIC_TIMER_BASE(APIC_TIMER_BASE_DIV) |
| 343 | 如果非irqen则lvtt_value或等于APIC_LVT_MASKED |
| 346 | apic_write(APIC_LVTT, lvtt_value) |
| 348 | 如果lvtt_value按位与APIC_LVT_TIMER_TSCDEADLINE则 |
| 354 | asm volatile |
| 356 | Print a one-time message (analogous to WARN_ONCE() et al):(debug-level messages "TSC deadline timer enabled\n") |
| 357 | 返回 |
| 364 | apic_write(APIC_TDCR, (tmp_value & ~(APIC_TDR_DIV_1 | APIC_TDR_DIV_TMBASE)) | APIC_TDR_DIV_16) |
| 368 | 如果非oneshot则apic_write(APIC_TMICT, clocks / Clock divisor ) |
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