[PATCH 2/5] lib: sbi: Add timer frequency to struct sbi_timer_device
Bin Meng
bmeng.cn at gmail.com
Thu Sep 16 00:33:18 PDT 2021
On Wed, Sep 15, 2021 at 5:22 PM Anup Patel <anup.patel at wdc.com> wrote:
>
> 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
Better to name it as ARIANE_ACLINT_TIMER_FREQ ?
> #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
ACLINT_TIMER_FREQ ?
> #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,
UX600_ACLINT_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,
> --
Regards,
Bin
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