/* * QEMU Emulated HPET support * * Copyright IBM, Corp. 2008 * * Authors: * Beth Kon <bkon@us.ibm.com> * * This work is licensed under the terms of the GNU GPL, version 2. See * the COPYING file in the top-level directory. * */ #ifndef QEMU_HPET_EMUL_H #define QEMU_HPET_EMUL_H #define HPET_BASE 0xfed00000 #define HPET_CLK_PERIOD 10000000ULL /* 10000000 femtoseconds == 10ns*/ #define FS_PER_NS 1000000 #define HPET_NUM_TIMERS 3 #define HPET_TIMER_TYPE_LEVEL 0x002 #define HPET_CFG_ENABLE 0x001 #define HPET_CFG_LEGACY 0x002 #define HPET_ID 0x000 #define HPET_PERIOD 0x004 #define HPET_CFG 0x010 #define HPET_STATUS 0x020 #define HPET_COUNTER 0x0f0 #define HPET_TN_CFG 0x000 #define HPET_TN_CMP 0x008 #define HPET_TN_ROUTE 0x010 #define HPET_CFG_WRITE_MASK 0x3 #define HPET_TN_ENABLE 0x004 #define HPET_TN_PERIODIC 0x008 #define HPET_TN_PERIODIC_CAP 0x010 #define HPET_TN_SIZE_CAP 0x020 #define HPET_TN_SETVAL 0x040 #define HPET_TN_32BIT 0x100 #define HPET_TN_INT_ROUTE_MASK 0x3e00 #define HPET_TN_CFG_WRITE_MASK 0x3f4e #define HPET_TN_INT_ROUTE_SHIFT 9 #define HPET_TN_INT_ROUTE_CAP_SHIFT 32 #define HPET_TN_CFG_BITS_READONLY_OR_RESERVED 0xffff80b1U struct HPETState; typedef struct HPETTimer { /* timers */ uint8_t tn; /*timer number*/ QEMUTimer *qemu_timer; struct HPETState *state; /* Memory-mapped, software visible timer registers */ uint64_t config; /* configuration/cap */ uint64_t cmp; /* comparator */ uint64_t fsb; /* FSB route, not supported now */ /* Hidden register state */ uint64_t period; /* Last value written to comparator */ uint8_t wrap_flag; /* timer pop will indicate wrap for one-shot 32-bit * mode. Next pop will be actual timer expiration. */ } HPETTimer; typedef struct HPETState { uint64_t hpet_offset; qemu_irq *irqs; HPETTimer timer[HPET_NUM_TIMERS]; /* Memory-mapped, software visible registers */ uint64_t capability; /* capabilities */ uint64_t config; /* configuration */ uint64_t isr; /* interrupt status reg */ uint64_t hpet_counter; /* main counter */ } HPETState; #if defined TARGET_I386 extern uint32_t hpet_in_legacy_mode(void); extern void hpet_init(qemu_irq *irq); #endif #endif