From: Bin Meng <bin.m...@windriver.com>
At present the CLINT timestamp is using a hard-coded timebase
frequency value SIFIVE_CLINT_TIMEBASE_FREQ. This might not be
true for all boards.
Add a new 'timebase-freq' property to the CLINT device, and
update various functions to accept this as a parameter.
Signed-off-by: Bin Meng <bin.m...@windriver.com>
---
hw/riscv/microchip_pfsoc.c | 6 +++++-
hw/riscv/sifive_clint.c | 25 ++++++++++++++-----------
hw/riscv/sifive_e.c | 3 ++-
hw/riscv/sifive_u.c | 3 ++-
hw/riscv/spike.c | 2 +-
hw/riscv/virt.c | 3 ++-
include/hw/riscv/sifive_clint.h | 3 ++-
target/riscv/cpu.h | 6 ++++--
target/riscv/cpu_helper.c | 4 +++-
target/riscv/csr.c | 4 ++--
10 files changed, 37 insertions(+), 22 deletions(-)
diff --git a/hw/riscv/microchip_pfsoc.c b/hw/riscv/microchip_pfsoc.c
index 139284a..e8b7f86 100644
--- a/hw/riscv/microchip_pfsoc.c
+++ b/hw/riscv/microchip_pfsoc.c
@@ -60,6 +60,9 @@
#define BIOS_FILENAME "hss.bin"
#define RESET_VECTOR 0x20220000
+/* CLINT timebase frequency */
+#define CLINT_TIMEBASE_FREQ 1000000
+
/* GEM version */
#define GEM_REVISION 0x0107010c
@@ -189,7 +192,8 @@ static void microchip_pfsoc_soc_realize(DeviceState *dev,
Error **errp)
/* CLINT */
sifive_clint_create(memmap[MICROCHIP_PFSOC_CLINT].base,
memmap[MICROCHIP_PFSOC_CLINT].size, ms->smp.cpus,
- SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE, false);
+ SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE,
+ CLINT_TIMEBASE_FREQ, false);
/* L2 cache controller */
create_unimplemented_device("microchip.pfsoc.l2cc",
diff --git a/hw/riscv/sifive_clint.c b/hw/riscv/sifive_clint.c
index 669c21a..a568568 100644
--- a/hw/riscv/sifive_clint.c
+++ b/hw/riscv/sifive_clint.c
@@ -29,22 +29,23 @@
#include "hw/riscv/sifive_clint.h"
#include "qemu/timer.h"
-static uint64_t cpu_riscv_read_rtc(void)
+static uint64_t cpu_riscv_read_rtc(uint32_t timebase_freq)
{
return muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
- SIFIVE_CLINT_TIMEBASE_FREQ, NANOSECONDS_PER_SECOND);
+ timebase_freq, NANOSECONDS_PER_SECOND);
}
/*
* Called when timecmp is written to update the QEMU timer or immediately
* trigger timer interrupt if mtimecmp <= current timer value.
*/
-static void sifive_clint_write_timecmp(RISCVCPU *cpu, uint64_t value)
+static void sifive_clint_write_timecmp(RISCVCPU *cpu, uint64_t value,
+ uint32_t timebase_freq)
{
uint64_t next;
uint64_t diff;
- uint64_t rtc_r = cpu_riscv_read_rtc();
+ uint64_t rtc_r = cpu_riscv_read_rtc(timebase_freq);
cpu->env.timecmp = value;
if (cpu->env.timecmp <= rtc_r) {
@@ -59,7 +60,7 @@ static void sifive_clint_write_timecmp(RISCVCPU *cpu,
uint64_t value)
diff = cpu->env.timecmp - rtc_r;
/* back to ns (note args switched in muldiv64) */
next = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
- muldiv64(diff, NANOSECONDS_PER_SECOND, SIFIVE_CLINT_TIMEBASE_FREQ);
+ muldiv64(diff, NANOSECONDS_PER_SECOND, timebase_freq);
timer_mod(cpu->env.timer, next);
}
@@ -111,10 +112,10 @@ static uint64_t sifive_clint_read(void *opaque, hwaddr
addr, unsigned size)
}
} else if (addr == clint->time_base) {
/* time_lo */
- return cpu_riscv_read_rtc() & 0xFFFFFFFF;
+ return cpu_riscv_read_rtc(clint->timebase_freq) & 0xFFFFFFFF;
} else if (addr == clint->time_base + 4) {
/* time_hi */
- return (cpu_riscv_read_rtc() >> 32) & 0xFFFFFFFF;
+ return (cpu_riscv_read_rtc(clint->timebase_freq) >> 32) & 0xFFFFFFFF;
}
error_report("clint: invalid read: %08x", (uint32_t)addr);
@@ -151,13 +152,13 @@ static void sifive_clint_write(void *opaque, hwaddr addr,
uint64_t value,
/* timecmp_lo */
uint64_t timecmp_hi = env->timecmp >> 32;
sifive_clint_write_timecmp(RISCV_CPU(cpu),
- timecmp_hi << 32 | (value & 0xFFFFFFFF));
+ timecmp_hi << 32 | (value & 0xFFFFFFFF), clint->timebase_freq);
return;
} else if ((addr & 0x7) == 4) {
/* timecmp_hi */
uint64_t timecmp_lo = env->timecmp;
sifive_clint_write_timecmp(RISCV_CPU(cpu),
- value << 32 | (timecmp_lo & 0xFFFFFFFF));
+ value << 32 | (timecmp_lo & 0xFFFFFFFF), clint->timebase_freq);
} else {
error_report("clint: invalid timecmp write: %08x", (uint32_t)addr);
}
@@ -191,6 +192,7 @@ static Property sifive_clint_properties[] = {
DEFINE_PROP_UINT32("timecmp-base", SiFiveCLINTState, timecmp_base, 0),
DEFINE_PROP_UINT32("time-base", SiFiveCLINTState, time_base, 0),
DEFINE_PROP_UINT32("aperture-size", SiFiveCLINTState, aperture_size, 0),
+ DEFINE_PROP_UINT32("timebase-freq", SiFiveCLINTState, timebase_freq, 0),
DEFINE_PROP_END_OF_LIST(),
};
@@ -229,7 +231,7 @@ type_init(sifive_clint_register_types)
*/
DeviceState *sifive_clint_create(hwaddr addr, hwaddr size, uint32_t num_harts,
uint32_t sip_base, uint32_t timecmp_base, uint32_t time_base,
- bool provide_rdtime)
+ uint32_t timebase_freq, bool provide_rdtime)
{
int i;
for (i = 0; i < num_harts; i++) {
@@ -239,7 +241,7 @@ DeviceState *sifive_clint_create(hwaddr addr, hwaddr size,
uint32_t num_harts,
continue;
}
if (provide_rdtime) {
- riscv_cpu_set_rdtime_fn(env, cpu_riscv_read_rtc);
+ riscv_cpu_set_rdtime_fn(env, cpu_riscv_read_rtc, timebase_freq);
}
env->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
&sifive_clint_timer_cb, cpu);
@@ -252,6 +254,7 @@ DeviceState *sifive_clint_create(hwaddr addr, hwaddr size,
uint32_t num_harts,
qdev_prop_set_uint32(dev, "timecmp-base", timecmp_base);
qdev_prop_set_uint32(dev, "time-base", time_base);
qdev_prop_set_uint32(dev, "aperture-size", size);
+ qdev_prop_set_uint32(dev, "timebase-freq", timebase_freq);
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr);
return dev;
diff --git a/hw/riscv/sifive_e.c b/hw/riscv/sifive_e.c
index c84d407..e7f6460 100644
--- a/hw/riscv/sifive_e.c
+++ b/hw/riscv/sifive_e.c
@@ -213,7 +213,8 @@ static void sifive_e_soc_realize(DeviceState *dev, Error
**errp)
memmap[SIFIVE_E_PLIC].size);
sifive_clint_create(memmap[SIFIVE_E_CLINT].base,
memmap[SIFIVE_E_CLINT].size, ms->smp.cpus,
- SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE, false);
+ SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE,
+ SIFIVE_CLINT_TIMEBASE_FREQ, false);
create_unimplemented_device("riscv.sifive.e.aon",
memmap[SIFIVE_E_AON].base, memmap[SIFIVE_E_AON].size);
sifive_e_prci_create(memmap[SIFIVE_E_PRCI].base);
diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
index e256da2..5ec9fca 100644
--- a/hw/riscv/sifive_u.c
+++ b/hw/riscv/sifive_u.c
@@ -706,7 +706,8 @@ static void sifive_u_soc_realize(DeviceState *dev, Error
**errp)
serial_hd(1), qdev_get_gpio_in(DEVICE(s->plic), SIFIVE_U_UART1_IRQ));
sifive_clint_create(memmap[SIFIVE_U_CLINT].base,
memmap[SIFIVE_U_CLINT].size, ms->smp.cpus,
- SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE, false);
+ SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE,
+ SIFIVE_CLINT_TIMEBASE_FREQ, false);
if (!sysbus_realize(SYS_BUS_DEVICE(&s->prci), errp)) {
return;
diff --git a/hw/riscv/spike.c b/hw/riscv/spike.c
index 13958bd..ae8593a 100644
--- a/hw/riscv/spike.c
+++ b/hw/riscv/spike.c
@@ -235,7 +235,7 @@ static void spike_board_init(MachineState *machine)
/* Core Local Interruptor (timer and IPI) */
sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size,
smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE,
- false);
+ SIFIVE_CLINT_TIMEBASE_FREQ, false);
}
static void spike_machine_init(MachineClass *mc)
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 6e91cf1..af0d06a 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -572,7 +572,8 @@ static void virt_machine_init(MachineState *machine)
memmap[VIRT_PLIC].size);
sifive_clint_create(memmap[VIRT_CLINT].base,
memmap[VIRT_CLINT].size, smp_cpus,
- SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE, true);
+ SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE,
+ SIFIVE_CLINT_TIMEBASE_FREQ, true);
sifive_test_create(memmap[VIRT_TEST].base);
for (i = 0; i < VIRTIO_COUNT; i++) {
diff --git a/include/hw/riscv/sifive_clint.h b/include/hw/riscv/sifive_clint.h
index 4a720bf..eb8577a 100644
--- a/include/hw/riscv/sifive_clint.h
+++ b/include/hw/riscv/sifive_clint.h
@@ -38,11 +38,12 @@ typedef struct SiFiveCLINTState {
uint32_t timecmp_base;
uint32_t time_base;
uint32_t aperture_size;
+ uint32_t timebase_freq;
} SiFiveCLINTState;
DeviceState *sifive_clint_create(hwaddr addr, hwaddr size, uint32_t num_harts,
uint32_t sip_base, uint32_t timecmp_base, uint32_t time_base,
- bool provide_rdtime);
+ uint32_t timebase_freq, bool provide_rdtime);
enum {
SIFIVE_SIP_BASE = 0x0,
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index d34bcfa..02486c3 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -219,7 +219,8 @@ struct CPURISCVState {
pmp_table_t pmp_state;
/* machine specific rdtime callback */
- uint64_t (*rdtime_fn)(void);
+ uint64_t (*rdtime_fn)(uint32_t);
+ uint32_t rdtime_fn_arg;
/* True if in debugger mode. */
bool debugger;
@@ -347,7 +348,8 @@ void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env);
int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint32_t interrupts);
uint32_t riscv_cpu_update_mip(RISCVCPU *cpu, uint32_t mask, uint32_t value);
#define BOOL_TO_MASK(x) (-!!(x)) /* helper for riscv_cpu_update_mip value */
-void riscv_cpu_set_rdtime_fn(CPURISCVState *env, uint64_t (*fn)(void));
+void riscv_cpu_set_rdtime_fn(CPURISCVState *env, uint64_t (*fn)(uint32_t),
+ uint32_t arg);
#endif
void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv);
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index fd1d373..c82a521 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -258,9 +258,11 @@ uint32_t riscv_cpu_update_mip(RISCVCPU *cpu, uint32_t
mask, uint32_t value)
return old;
}
-void riscv_cpu_set_rdtime_fn(CPURISCVState *env, uint64_t (*fn)(void))
+void riscv_cpu_set_rdtime_fn(CPURISCVState *env, uint64_t (*fn)(uint32_t),
+ uint32_t arg)
{
env->rdtime_fn = fn;
+ env->rdtime_fn_arg = arg;
}
void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv)
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index 6a96a01..6cef1ac 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -294,7 +294,7 @@ static int read_time(CPURISCVState *env, int csrno,
target_ulong *val)
return -1;
}
- *val = env->rdtime_fn() + delta;
+ *val = env->rdtime_fn(env->rdtime_fn_arg) + delta;
return 0;
}
@@ -307,7 +307,7 @@ static int read_timeh(CPURISCVState *env, int csrno,
target_ulong *val)
return -1;
}
- *val = (env->rdtime_fn() + delta) >> 32;
+ *val = (env->rdtime_fn(env->rdtime_fn_arg) + delta) >> 32;
return 0;
}
#endif
--
2.7.4
