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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] [qemu] Update acpi timer to not use a qemu timer.
# HG changeset patch
# User chris@xxxxxxxxxxxxxxxxxxxxxxxx
# Node ID 1de1bb6a51c565924aa44645c67a4305a5a8c69a
# Parent c908f4c9150d3dd07641ca99fff4bdab7bd77844
[qemu] Update acpi timer to not use a qemu timer.
Compute the acpi timer's value when it is accessed instead of using
a qemu timer to keep it uptodate.
From: Wang, Winston L <winston.l.wang@xxxxxxxxx>
Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxxx>
---
tools/ioemu/hw/piix4acpi.c | 149 ++++++++++-----------------------------------
1 files changed, 35 insertions(+), 114 deletions(-)
diff -r c908f4c9150d -r 1de1bb6a51c5 tools/ioemu/hw/piix4acpi.c
--- a/tools/ioemu/hw/piix4acpi.c Fri Aug 04 11:03:17 2006 +0100
+++ b/tools/ioemu/hw/piix4acpi.c Fri Aug 04 11:33:41 2006 +0100
@@ -24,26 +24,26 @@
*/
#include "vl.h"
-#define FREQUENCE_PMTIMER 3753425
+#define FREQUENCE_PMTIMER 3579545
/* acpi register bit define here */
-/* PM1_STS */
-#define TMROF_STS (1 << 0)
-#define BM_STS (1 << 4)
-#define GBL_STS (1 << 5)
-#define PWRBTN_STS (1 << 8)
-#define RTC_STS (1 << 10)
+/* PM1_STS */
+#define TMROF_STS (1 << 0)
+#define BM_STS (1 << 4)
+#define GBL_STS (1 << 5)
+#define PWRBTN_STS (1 << 8)
+#define RTC_STS (1 << 10)
#define PRBTNOR_STS (1 << 11)
-#define WAK_STS (1 << 15)
-/* PM1_EN */
+#define WAK_STS (1 << 15)
+/* PM1_EN */
#define TMROF_EN (1 << 0)
#define GBL_EN (1 << 5)
#define PWRBTN_EN (1 << 8)
-#define RTC_EN (1 << 10)
-/* PM1_CNT */
+#define RTC_EN (1 << 10)
+/* PM1_CNT */
#define SCI_EN (1 << 0)
#define GBL_RLS (1 << 2)
-#define SLP_EN (1 << 13)
+#define SLP_EN (1 << 13)
/* Bits of PM1a register define here */
#define SLP_TYP_MASK 0x1C00
@@ -51,14 +51,6 @@
typedef struct AcpiDeviceState AcpiDeviceState;
AcpiDeviceState *acpi_device_table;
-
-/* Bits of PM1a register define here */
-typedef struct PMTState {
- uint32_t count;
- int irq;
- uint64_t next_pm_time;
- QEMUTimer *pm_timer;
-}PMTState;
typedef struct PM1Event_BLK {
uint16_t pm1_status; /* pm1a_EVT_BLK */
@@ -72,83 +64,10 @@ typedef struct PCIAcpiState {
uint16_t pm1_enable; /* pm1a_EVT_BLK+2 */
uint16_t pm1_control; /* pm1a_ECNT_BLK */
uint32_t pm1_timer; /* pmtmr_BLK */
+ uint64_t old_vmck_ticks /* using vm_clock counter */
} PCIAcpiState;
-static PMTState *pmtimer_state;
static PCIAcpiState *acpi_state;
-
-static void pmtimer_save(QEMUFile *f, void *opaque)
-{
- PMTState *s = opaque;
-
- qemu_put_be32s(f, &s->count);
- qemu_put_be32s(f, &s->irq);
- qemu_put_be64s(f, &s->next_pm_time);
- qemu_put_timer(f, s->pm_timer);
-}
-
-static int pmtimer_load(QEMUFile *f, void *opaque, int version_id)
-{
- PMTState *s = opaque;
-
- if (version_id != 1)
- return -EINVAL;
- qemu_get_be32s(f, &s->count);
- qemu_get_be32s(f, &s->irq);
- qemu_get_be64s(f, &s->next_pm_time);
- qemu_get_timer(f, s->pm_timer);
- return 0;
-}
-
-static inline void acpi_set_irq(PCIAcpiState *s)
-{
-/* no real SCI event need for now, so comment the following line out */
-/* pic_set_irq(s->irq, 1); */
- printf("acpi_set_irq: s->irq %x \n",s->irq);
-}
-
-static void pm_timer_update(void *opaque)
-{
- PMTState *s = opaque;
- s->next_pm_time = qemu_get_clock(vm_clock) +
- muldiv64(1, ticks_per_sec,FREQUENCE_PMTIMER);
- qemu_mod_timer(s->pm_timer, s->next_pm_time);
- acpi_state->pm1_timer ++;
-
- /* If pm timer is zero then reset it to zero. */
- if (acpi_state->pm1_timer >= 0x1000000) {
-/* printf("pm_timerupdate: timer overflow: %x \n",
acpi_state->pm1_timer); */
-
- acpi_state->pm1_timer = 0;
- acpi_state->pm1_status = acpi_state->pm1_status | TMROF_STS;
- /* If TMROF_EN is set then send the irq. */
- if ((acpi_state->pm1_enable & TMROF_EN) == TMROF_EN) {
- acpi_set_irq(acpi_state);
- acpi_state->pm1_enable = 0x00; /* only need one time...*/
- }
- }
- s->count = acpi_state->pm1_timer;
-}
-
-static PMTState *pmtimer_init(void)
-{
- PMTState *s;
-
- s = qemu_mallocz(sizeof(PMTState));
- if (!s)
- return NULL;
-
- /* s->irq = irq; */
-
- s->pm_timer = qemu_new_timer(vm_clock, pm_timer_update, s);
-
- s->count = 0;
- s->next_pm_time = qemu_get_clock(vm_clock) + muldiv64(1,
ticks_per_sec,FREQUENCE_PMTIMER) + 1;
- qemu_mod_timer(s->pm_timer, s->next_pm_time);
-
- register_savevm("pm timer", 1, 1, pmtimer_save, pmtimer_load, s);
- return s;
-}
static void acpi_reset(PCIAcpiState *s)
{
@@ -162,6 +81,7 @@ static void acpi_reset(PCIAcpiState *s)
s->pm1_enable = 0x00; /* TMROF_EN should cleared */
s->pm1_control = SCI_EN; /* SCI_EN */
s->pm1_timer = 0;
+ s->old_vmck_ticks = qemu_get_clock(vm_clock);
}
/*byte access */
@@ -173,8 +93,8 @@ static void acpiPm1Status_writeb(void *o
s->pm1_status = s->pm1_status&!TMROF_STS;
if ((val&GBL_STS)==GBL_STS)
- s->pm1_status = s->pm1_status&!GBL_STS;
-
+ s->pm1_status = s->pm1_status&!GBL_STS;
+
/* printf("acpiPm1Status_writeb \n addr %x val:%x pm1_status:%x \n", addr,
val,s->pm1_status); */
}
@@ -193,7 +113,7 @@ static void acpiPm1StatusP1_writeb(void
{
PCIAcpiState *s = opaque;
- s->pm1_status = (val<<8)||(s->pm1_status);
+ s->pm1_status = (val<<8)||(s->pm1_status);
/* printf("acpiPm1StatusP1_writeb \n addr %x val:%x\n", addr, val); */
}
@@ -305,7 +225,7 @@ static void acpiPm1Status_writew(void *o
s->pm1_status = s->pm1_status&!TMROF_STS;
if ((val&GBL_STS)==GBL_STS)
- s->pm1_status = s->pm1_status&!GBL_STS;
+ s->pm1_status = s->pm1_status&!GBL_STS;
/* printf("acpiPm1Status_writew \n addr %x val:%x pm1_status:%x \n", addr,
val,s->pm1_status); */
}
@@ -384,7 +304,7 @@ static uint32_t acpiPm1Event_readl(void
{
PCIAcpiState *s = opaque;
uint32_t val;
-
+
val = s->pm1_status|(s->pm1_enable<<16);
/* printf("acpiPm1Event_readl \n addr %x val:%x\n", addr, val); */
@@ -396,17 +316,21 @@ static void acpiPm1Timer_writel(void *op
PCIAcpiState *s = opaque;
s->pm1_timer = val;
-/* printf("acpiPm1Timer_writel \n addr %x val:%x\n", addr, val); */
+ s->old_vmck_ticks = qemu_get_clock(vm_clock) +
+ muldiv64(val, FREQUENCE_PMTIMER, ticks_per_sec);
}
static uint32_t acpiPm1Timer_readl(void *opaque, uint32_t addr)
{
PCIAcpiState *s = opaque;
- uint32_t val;
-
- val = s->pm1_timer;
-/* printf("acpiPm1Timer_readl \n addr %x val:%x\n", addr, val); */
- return val;
+ int64_t current_vmck_ticks = qemu_get_clock(vm_clock);
+ int64_t vmck_ticks_delta = current_vmck_ticks - s->old_vmck_ticks;
+
+ if (s->old_vmck_ticks)
+ s->pm1_timer += muldiv64(vmck_ticks_delta, FREQUENCE_PMTIMER,
+ ticks_per_sec);
+ s->old_vmck_ticks = current_vmck_ticks;
+ return s->pm1_timer;
}
static void acpi_map(PCIDevice *pci_dev, int region_num,
@@ -414,7 +338,7 @@ static void acpi_map(PCIDevice *pci_dev,
{
PCIAcpiState *d = (PCIAcpiState *)pci_dev;
- printf("register acpi io \n");
+ printf("register acpi io\n");
/* Byte access */
register_ioport_write(addr, 1, 1, acpiPm1Status_writeb, d);
@@ -430,14 +354,14 @@ static void acpi_map(PCIDevice *pci_dev,
register_ioport_write(addr + 4, 1, 1, acpiPm1Control_writeb, d);
register_ioport_read(addr + 4, 1, 1, acpiPm1Control_readb, d);
register_ioport_write(addr + 4 + 1, 1, 1, acpiPm1ControlP1_writeb, d);
- register_ioport_read(addr + 4 +1, 1, 1, acpiPm1ControlP1_readb, d);
+ register_ioport_read(addr + 4 +1, 1, 1, acpiPm1ControlP1_readb, d);
/* Word access */
register_ioport_write(addr, 2, 2, acpiPm1Status_writew, d);
register_ioport_read(addr, 2, 2, acpiPm1Status_readw, d);
register_ioport_write(addr + 2, 2, 2, acpiPm1Enable_writew, d);
- register_ioport_read(addr + 2, 2, 2, acpiPm1Enable_readw, d);
+ register_ioport_read(addr + 2, 2, 2, acpiPm1Enable_readw, d);
register_ioport_write(addr + 4, 2, 2, acpiPm1Control_writew, d);
register_ioport_read(addr + 4, 2, 2, acpiPm1Control_readw, d);
@@ -445,11 +369,10 @@ static void acpi_map(PCIDevice *pci_dev,
/* DWord access */
register_ioport_write(addr, 4, 4, acpiPm1Event_writel, d);
register_ioport_read(addr, 4, 4, acpiPm1Event_readl, d);
-
+
register_ioport_write(addr + 8, 4, 4, acpiPm1Timer_writel, d);
register_ioport_read(addr + 8, 4, 4, acpiPm1Timer_readl, d);
}
-
/* PIIX4 acpi pci configuration space, func 3 */
void pci_piix4_acpi_init(PCIBus *bus)
@@ -478,7 +401,5 @@ void pci_piix4_acpi_init(PCIBus *bus)
pci_register_io_region((PCIDevice *)d, 4, 0x10,
PCI_ADDRESS_SPACE_IO, acpi_map);
- pmtimer_state = pmtimer_init();
-
- acpi_reset (d);
-}
+ acpi_reset(d);
+}
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