diff options
| author | Yann Gautier <yann.gautier@st.com> | 2019-05-22 19:13:51 +0200 |
|---|---|---|
| committer | Yann Gautier <yann.gautier@st.com> | 2019-09-02 17:51:57 +0200 |
| commit | e463d3f43e0115fbafd7a17f7ba550fc8e9a2ae0 (patch) | |
| tree | a0336d26163c963895f97d81ce01a4b5e54837ab /plat/st | |
| parent | 6cb45f8984af596fc5460204e9be1d85de79cf5e (diff) | |
stm32mp1: use a common function to check spinlock is available
To use spinlocks, MMU should be enabled, as well as data cache.
A common function is created (moved from clock file).
It is then used whenever a spinlock has to be taken, in BSEC and clock
drivers.
Change-Id: I94baed0114a2061ad71bd5287a91bf7f1c6821f6
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Diffstat (limited to 'plat/st')
| -rw-r--r-- | plat/st/common/include/stm32mp_common.h | 3 | ||||
| -rw-r--r-- | plat/st/common/stm32mp_common.c | 8 |
2 files changed, 11 insertions, 0 deletions
diff --git a/plat/st/common/include/stm32mp_common.h b/plat/st/common/include/stm32mp_common.h index 0d0a9c66..3dd6c567 100644 --- a/plat/st/common/include/stm32mp_common.h +++ b/plat/st/common/include/stm32mp_common.h @@ -30,6 +30,9 @@ uintptr_t stm32mp_pwr_base(void); /* Return the base address of the RCC peripheral */ uintptr_t stm32mp_rcc_base(void); +/* Check MMU status to allow spinlock use */ +bool stm32mp_lock_available(void); + /* Get IWDG platform instance ID from peripheral IO memory base address */ uint32_t stm32_iwdg_get_instance(uintptr_t base); diff --git a/plat/st/common/stm32mp_common.c b/plat/st/common/stm32mp_common.c index f95c7885..5428a74e 100644 --- a/plat/st/common/stm32mp_common.c +++ b/plat/st/common/stm32mp_common.c @@ -87,6 +87,14 @@ uintptr_t stm32mp_rcc_base(void) return rcc_base; } +bool stm32mp_lock_available(void) +{ + const uint32_t c_m_bits = SCTLR_M_BIT | SCTLR_C_BIT; + + /* The spinlocks are used only when MMU and data cache are enabled */ + return (read_sctlr() & c_m_bits) == c_m_bits; +} + uintptr_t stm32_get_gpio_bank_base(unsigned int bank) { if (bank == GPIO_BANK_Z) { |