[PATCH 2/5] lib: sbi: Add timer frequency to struct sbi_timer_device
Anup Patel
anup.patel at wdc.com
Wed Sep 15 02:21:25 PDT 2021
Generic mdelay() and udelay() functions can be provided by the
sbi_timer framework if timer frequency is available in the timer
instance provided by the platform support or timer driver.
This patch adds timer frequency (timer_freq) member in the
struct sbi_timer_device for above purpose.
Signed-off-by: Anup Patel <anup.patel at wdc.com>
---
include/sbi/sbi_timer.h | 3 +++
include/sbi_utils/timer/aclint_mtimer.h | 1 +
lib/utils/timer/aclint_mtimer.c | 3 +++
lib/utils/timer/fdt_timer_mtimer.c | 4 ++++
platform/fpga/ariane/platform.c | 2 ++
platform/fpga/openpiton/platform.c | 7 +++++++
platform/kendryte/k210/platform.c | 1 +
platform/kendryte/k210/platform.h | 2 +-
platform/nuclei/ux600/platform.c | 1 +
platform/template/platform.c | 2 ++
10 files changed, 25 insertions(+), 1 deletion(-)
diff --git a/include/sbi/sbi_timer.h b/include/sbi/sbi_timer.h
index 1ba6da0..211e83d 100644
--- a/include/sbi/sbi_timer.h
+++ b/include/sbi/sbi_timer.h
@@ -17,6 +17,9 @@ struct sbi_timer_device {
/** Name of the timer operations */
char name[32];
+ /** Frequency of timer in HZ */
+ unsigned long timer_freq;
+
/** Get free-running timer value */
u64 (*timer_value)(void);
diff --git a/include/sbi_utils/timer/aclint_mtimer.h b/include/sbi_utils/timer/aclint_mtimer.h
index a9fe445..f02cc62 100644
--- a/include/sbi_utils/timer/aclint_mtimer.h
+++ b/include/sbi_utils/timer/aclint_mtimer.h
@@ -24,6 +24,7 @@
struct aclint_mtimer_data {
/* Public details */
+ unsigned long mtime_freq;
unsigned long mtime_addr;
unsigned long mtime_size;
unsigned long mtimecmp_addr;
diff --git a/lib/utils/timer/aclint_mtimer.c b/lib/utils/timer/aclint_mtimer.c
index d612b12..62e87f7 100644
--- a/lib/utils/timer/aclint_mtimer.c
+++ b/lib/utils/timer/aclint_mtimer.c
@@ -186,6 +186,8 @@ int aclint_mtimer_cold_init(struct aclint_mtimer_data *mt,
(mt->first_hartid >= SBI_HARTMASK_MAX_BITS) ||
(mt->hart_count > ACLINT_MTIMER_MAX_HARTS))
return SBI_EINVAL;
+ if (reference && mt->mtime_freq != reference->mtime_freq)
+ return SBI_EINVAL;
/* Initialize private data */
aclint_mtimer_set_reference(mt, reference);
@@ -227,6 +229,7 @@ int aclint_mtimer_cold_init(struct aclint_mtimer_data *mt,
return rc;
}
+ mtimer.timer_freq = mt->mtime_freq;
sbi_timer_set_device(&mtimer);
return 0;
diff --git a/lib/utils/timer/fdt_timer_mtimer.c b/lib/utils/timer/fdt_timer_mtimer.c
index 4eafffa..1ad8508 100644
--- a/lib/utils/timer/fdt_timer_mtimer.c
+++ b/lib/utils/timer/fdt_timer_mtimer.c
@@ -38,6 +38,10 @@ static int timer_mtimer_cold_init(void *fdt, int nodeoff,
mt->has_64bit_mmio = true;
mt->has_shared_mtime = false;
+ rc = fdt_parse_timebase_frequency(fdt, &mt->mtime_freq);
+ if (rc)
+ return rc;
+
if (match->data) { /* SiFive CLINT */
/* Set CLINT addresses */
mt->mtimecmp_addr = addr[0] + ACLINT_DEFAULT_MTIMECMP_OFFSET;
diff --git a/platform/fpga/ariane/platform.c b/platform/fpga/ariane/platform.c
index 58a46c0..b17b61d 100644
--- a/platform/fpga/ariane/platform.c
+++ b/platform/fpga/ariane/platform.c
@@ -26,6 +26,7 @@
#define ARIANE_PLIC_NUM_SOURCES 3
#define ARIANE_HART_COUNT 1
#define ARIANE_CLINT_ADDR 0x2000000
+#define ARIANE_ACLINT_FREQ 1000000
#define ARIANE_ACLINT_MSWI_ADDR (ARIANE_CLINT_ADDR + \
CLINT_MSWI_OFFSET)
#define ARIANE_ACLINT_MTIMER_ADDR (ARIANE_CLINT_ADDR + \
@@ -44,6 +45,7 @@ static struct aclint_mswi_data mswi = {
};
static struct aclint_mtimer_data mtimer = {
+ .mtime_freq = ARIANE_ACLINT_FREQ,
.mtime_addr = ARIANE_ACLINT_MTIMER_ADDR +
ACLINT_DEFAULT_MTIME_OFFSET,
.mtime_size = ACLINT_DEFAULT_MTIME_SIZE,
diff --git a/platform/fpga/openpiton/platform.c b/platform/fpga/openpiton/platform.c
index a9bfa99..47d3f30 100644
--- a/platform/fpga/openpiton/platform.c
+++ b/platform/fpga/openpiton/platform.c
@@ -25,6 +25,7 @@
#define OPENPITON_DEFAULT_PLIC_ADDR 0xfff1100000
#define OPENPITON_DEFAULT_PLIC_NUM_SOURCES 2
#define OPENPITON_DEFAULT_HART_COUNT 3
+#define OPENPITON_DEFAULT_CLINT_FREQ 1000000
#define OPENPITON_DEFAULT_CLINT_ADDR 0xfff1020000
#define OPENPITON_DEFAULT_ACLINT_MSWI_ADDR \
(OPENPITON_DEFAULT_CLINT_ADDR + CLINT_MSWI_OFFSET)
@@ -49,6 +50,7 @@ static struct aclint_mswi_data mswi = {
};
static struct aclint_mtimer_data mtimer = {
+ .mtime_freq = OPENPITON_DEFAULT_CLINT_FREQ,
.mtime_addr = OPENPITON_DEFAULT_ACLINT_MTIMER_ADDR +
ACLINT_DEFAULT_MTIME_OFFSET,
.mtime_size = ACLINT_DEFAULT_MTIME_SIZE,
@@ -68,6 +70,7 @@ static int openpiton_early_init(bool cold_boot)
void *fdt;
struct platform_uart_data uart_data;
struct plic_data plic_data;
+ unsigned long aclint_freq;
uint64_t clint_addr;
int rc;
@@ -83,6 +86,10 @@ static int openpiton_early_init(bool cold_boot)
if (!rc)
plic = plic_data;
+ rc = fdt_parse_timebase_frequency(fdt, &aclint_freq);
+ if (!rc)
+ mtimer.mtime_freq = aclint_freq;
+
rc = fdt_parse_compat_addr(fdt, &clint_addr, "riscv,clint0");
if (!rc) {
mswi.addr = clint_addr;
diff --git a/platform/kendryte/k210/platform.c b/platform/kendryte/k210/platform.c
index ee4c223..6ec9699 100644
--- a/platform/kendryte/k210/platform.c
+++ b/platform/kendryte/k210/platform.c
@@ -42,6 +42,7 @@ static struct aclint_mswi_data mswi = {
};
static struct aclint_mtimer_data mtimer = {
+ .mtime_freq = K210_ACLINT_FREQ,
.mtime_addr = K210_ACLINT_MTIMER_ADDR +
ACLINT_DEFAULT_MTIME_OFFSET,
.mtime_size = ACLINT_DEFAULT_MTIME_SIZE,
diff --git a/platform/kendryte/k210/platform.h b/platform/kendryte/k210/platform.h
index 0a32530..79befe2 100644
--- a/platform/kendryte/k210/platform.h
+++ b/platform/kendryte/k210/platform.h
@@ -14,7 +14,7 @@
#define K210_HART_COUNT 2
#define K210_UART_BAUDRATE 115200
-
+#define K210_ACLINT_FREQ 7800000
#define K210_CLK0_FREQ 26000000UL
#define K210_PLIC_NUM_SOURCES 65
diff --git a/platform/nuclei/ux600/platform.c b/platform/nuclei/ux600/platform.c
index ab0becc..6bef4c4 100644
--- a/platform/nuclei/ux600/platform.c
+++ b/platform/nuclei/ux600/platform.c
@@ -74,6 +74,7 @@ static struct aclint_mswi_data mswi = {
};
static struct aclint_mtimer_data mtimer = {
+ .mtime_freq = UX600_TIMER_FREQ,
.mtime_addr = UX600_ACLINT_MTIMER_ADDR +
ACLINT_DEFAULT_MTIME_OFFSET,
.mtime_size = ACLINT_DEFAULT_MTIME_SIZE,
diff --git a/platform/template/platform.c b/platform/template/platform.c
index 4528822..99e70c6 100644
--- a/platform/template/platform.c
+++ b/platform/template/platform.c
@@ -22,6 +22,7 @@
#define PLATFORM_PLIC_NUM_SOURCES 128
#define PLATFORM_HART_COUNT 4
#define PLATFORM_CLINT_ADDR 0x2000000
+#define PLATFORM_ACLINT_FREQ 10000000
#define PLATFORM_ACLINT_MSWI_ADDR (PLATFORM_CLINT_ADDR + \
CLINT_MSWI_OFFSET)
#define PLATFORM_ACLINT_MTIMER_ADDR (PLATFORM_CLINT_ADDR + \
@@ -43,6 +44,7 @@ static struct aclint_mswi_data mswi = {
};
static struct aclint_mtimer_data mtimer = {
+ .mtime_freq = PLATFORM_ACLINT_FREQ,
.mtime_addr = PLATFORM_ACLINT_MTIMER_ADDR +
ACLINT_DEFAULT_MTIME_OFFSET,
.mtime_size = ACLINT_DEFAULT_MTIME_SIZE,
--
2.25.1
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