18 static uint64_t HPET_REG_BASE = 0;  variable
137     __write8b(HPET_REG_BASE + MAIN_CNT, 0);  in HPET_measure_freq()
139     __write8b((HPET_REG_BASE + TIM0_CONF), 0x0044); // 设置定时器0为非周期，边沿触发，默认投递到IO APIC的2号引脚  in HPET_measure_freq()
141     __write8b(HPET_REG_BASE + TIM0_COMP, clks_to_intr);  in HPET_measure_freq()
160     __write8b(HPET_REG_BASE + GEN_CONF, 3); // 置位旧设备中断路由兼容标志位、定时器组使能标志位，开始计时  in HPET_measure_freq()
170     *(uint64_t *)(HPET_REG_BASE + GEN_CONF) = 0; // 停用HPET定时器  in HPET_measure_freq()
199     __write8b(HPET_REG_BASE + MAIN_CNT, 0);  in HPET_enable()
201 …__write8b(HPET_REG_BASE + TIM0_CONF, 0x004c); // 设置定时器0为周期定时，边沿触发，默认投递到IO APIC的2号引脚(看conf寄存器的高32bi…  in HPET_enable()
203     __write8b(HPET_REG_BASE + TIM0_COMP, clks_to_intr);  in HPET_enable()
212     __write8b(HPET_REG_BASE + GEN_CONF, 3); // 置位旧设备中断路由兼容标志位、定时器组使能标志位  in HPET_enable()
240                 HPET_REG_BASE = SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE + 0xfed00000;  in HPET_init()
243                 HPET_REG_BASE = SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE + 0xfed01000;  in HPET_init()
246                 HPET_REG_BASE = SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE + 0xfed02000;  in HPET_init()
249                 HPET_REG_BASE = SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE + 0xfed03000;  in HPET_init()
261             HPET_REG_BASE = SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE + 0xfed00000;  in HPET_init()
271         HPET_REG_BASE = SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE + hpet_table->address;  in HPET_init()
274     kdebug("HPET_REG_BASE=%#018lx", HPET_REG_BASE);  in HPET_init()
278     tmp = __read8b(HPET_REG_BASE + GCAP_ID);  in HPET_init()