[Qemu-devel] [PATCH 4/6] prepare to create HPET, RTC and i8254 through composition

[Wanpeng Li <liwp@linux.vnet.ibm.com>]

From: Anthony Liguori <aliguori@us.ibm.com>

The HPET usually sits on the LPC bus (which replaces ISA in modern systems).  
It's sometimes a dedicated chip but can certain co-exist in a Super IO chip.  
I think in terms of where it would live in this hypothetical device model,
putting it in the PIIX is rational.


Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Wanpeng Li <liwp@linux.vnet.ibm.com>

---
 hw/hpet.c           |   39 ++-------------------------------------
 hw/hpet_emul.h      |   41 +++++++++++++++++++++++++++++++++++++++++
 hw/i8254_internal.h |    2 +-
 hw/mc146818rtc.c    |   26 --------------------------
 hw/mc146818rtc.h    |   29 +++++++++++++++++++++++++++++
 5 files changed, 73 insertions(+), 64 deletions(-)

diff --git a/hw/hpet.c b/hw/hpet.c
index fd3ddca..fc0ff6c 100644
--- a/hw/hpet.c
+++ b/hw/hpet.c
@@ -42,41 +42,6 @@
 
 #define HPET_MSI_SUPPORT        0
 
-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 */
-    /* 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 {
-    SysBusDevice busdev;
-    MemoryRegion iomem;
-    uint64_t hpet_offset;
-    qemu_irq irqs[HPET_NUM_IRQ_ROUTES];
-    uint32_t flags;
-    uint8_t rtc_irq_level;
-    qemu_irq pit_enabled;
-    uint8_t num_timers;
-    HPETTimer timer[HPET_MAX_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 */
-    uint8_t  hpet_id;           /* instance id */
-} HPETState;
-
 static uint32_t hpet_in_legacy_mode(HPETState *s)
 {
     return s->config & HPET_CFG_LEGACY;
@@ -278,7 +243,7 @@ static const VMStateDescription vmstate_hpet_timer = {
 };
 
 static const VMStateDescription vmstate_hpet = {
-    .name = "hpet",
+    .name = TYPE_HPET,
     .version_id = 2,
     .minimum_version_id = 1,
     .minimum_version_id_old = 1,
@@ -746,7 +711,7 @@ static void hpet_device_class_init(ObjectClass *klass, void *data)
 }
 
 static TypeInfo hpet_device_info = {
-    .name          = "hpet",
+    .name          = TYPE_HPET,
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(HPETState),
     .class_init    = hpet_device_class_init,
diff --git a/hw/hpet_emul.h b/hw/hpet_emul.h
index 757f79f..5808a19 100644
--- a/hw/hpet_emul.h
+++ b/hw/hpet_emul.h
@@ -13,6 +13,9 @@
 #ifndef QEMU_HPET_EMUL_H
 #define QEMU_HPET_EMUL_H
 
+#include "hw.h"
+#include "sysbus.h"
+
 #define HPET_BASE               0xfed00000
 #define HPET_CLK_PERIOD         10000000ULL /* 10000000 femtoseconds == 10ns*/
 
@@ -71,4 +74,42 @@ struct hpet_fw_config
 } QEMU_PACKED;
 
 extern struct hpet_fw_config hpet_cfg;
+
+#define TYPE_HPET "hpet"
+
+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 */
+    /* 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 {
+    SysBusDevice busdev;
+    MemoryRegion iomem;
+    uint64_t hpet_offset;
+    qemu_irq irqs[HPET_NUM_IRQ_ROUTES];
+    uint32_t flags;
+    uint8_t rtc_irq_level;
+	qemu_irq pit_enabled;
+    uint8_t num_timers;
+    HPETTimer timer[HPET_MAX_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 */
+    uint8_t  hpet_id;           /* instance id */
+} HPETState;
+
 #endif
diff --git a/hw/i8254_internal.h b/hw/i8254_internal.h
index 686f0c2..542f7c1 100644
--- a/hw/i8254_internal.h
+++ b/hw/i8254_internal.h
@@ -26,7 +26,6 @@
 #define QEMU_I8254_INTERNAL_H
 
 #include "hw.h"
-#include "pc.h"
 #include "isa.h"
 
 typedef struct PITChannelState {
@@ -57,6 +56,7 @@ typedef struct PITCommonState {
     PITChannelState channels[3];
 } PITCommonState;
 
+#define TYPE_PIT "isa-pit"
 #define TYPE_PIT_COMMON "pit-common"
 #define PIT_COMMON(obj) \
      OBJECT_CHECK(PITCommonState, (obj), TYPE_PIT_COMMON)
diff --git a/hw/mc146818rtc.c b/hw/mc146818rtc.c
index 2b59c36..5375f96 100644
--- a/hw/mc146818rtc.c
+++ b/hw/mc146818rtc.c
@@ -80,32 +80,6 @@
 #define REG_C_PF   0x40
 #define REG_C_AF   0x20
 
-typedef struct RTCState {
-    ISADevice dev;
-    MemoryRegion io;
-    uint8_t cmos_data[128];
-    uint8_t cmos_index;
-    struct tm current_tm;
-    int32_t base_year;
-    qemu_irq irq;
-    qemu_irq sqw_irq;
-    int it_shift;
-    /* periodic timer */
-    QEMUTimer *periodic_timer;
-    int64_t next_periodic_time;
-    /* second update */
-    int64_t next_second_time;
-    uint16_t irq_reinject_on_ack_count;
-    uint32_t irq_coalesced;
-    uint32_t period;
-    QEMUTimer *coalesced_timer;
-    QEMUTimer *second_timer;
-    QEMUTimer *second_timer2;
-    Notifier clock_reset_notifier;
-    LostTickPolicy lost_tick_policy;
-    Notifier suspend_notifier;
-} RTCState;
-
 static void rtc_set_time(RTCState *s);
 static void rtc_copy_date(RTCState *s);
 
diff --git a/hw/mc146818rtc.h b/hw/mc146818rtc.h
index f119930..60a4b4e 100644
--- a/hw/mc146818rtc.h
+++ b/hw/mc146818rtc.h
@@ -2,9 +2,38 @@
 #define MC146818RTC_H
 
 #include "isa.h"
+#include "notify.h"
 
 #define RTC_ISA_IRQ 8
 
+#define TYPE_RTC "mc146818rtc"
+
+typedef struct RTCState {
+    ISADevice dev;
+    MemoryRegion io;
+    uint8_t cmos_data[128];
+    uint8_t cmos_index;
+    struct tm current_tm;
+    int32_t base_year;
+    qemu_irq irq;
+    qemu_irq sqw_irq;
+    int it_shift;
+    /* periodic timer */
+    QEMUTimer *periodic_timer;
+    int64_t next_periodic_time;
+    /* second update */
+    int64_t next_second_time;
+    uint16_t irq_reinject_on_ack_count;
+    uint32_t irq_coalesced;
+    uint32_t period;
+    QEMUTimer *coalesced_timer;
+    QEMUTimer *second_timer;
+    QEMUTimer *second_timer2;
+    Notifier clock_reset_notifier;
+    LostTickPolicy lost_tick_policy;
+	Notifier suspend_notifier;
+} RTCState;
+
 ISADevice *rtc_init(ISABus *bus, int base_year, qemu_irq intercept_irq);
 void rtc_set_memory(ISADevice *dev, int addr, int val);
 void rtc_set_date(ISADevice *dev, const struct tm *tm);
-- 
1.7.5.4