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bsps/stm32u5: Keep clock if running from OSPI

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If the clock is changed during boot, the memory becomes inaccessible and
the system can't continue to run from OSPI.
This commit is contained in:
Christian Mauderer
2024-11-27 13:31:26 +01:00
committed by Amar Takhar
parent d735d4459c
commit b629e6afbc
1 changed files with 26 additions and 8 deletions
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34
bsps/arm/stm32u5/start/bspstarthooks.c
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@@ -135,19 +135,37 @@ void BSP_START_TEXT_SECTION bsp_start_hook_0( void )
HAL_GetTick_ptr = Startup_HAL_GetTick;
startup_delay_call_counter = 0;
SystemInit();
SystemCoreClockUpdate();
stm32u5_rcc_power_clock_enable();
stm32u5_init_oscillator();
stm32u5_init_clocks();
stm32u5_init_power();
stm32u5_init_peripheral_clocks();
/*
* If we are running from OctoSPI, we must not touch the clocks and pins.
* Otherwise the OSPI RAM won't work any more.
*
* Doing this check here instead of using a compile time option has the
* advantage, that only one BSP is necessary to compile (for example) a
* bootloader running from Flash and an application that runs from OSPI RAM.
* They would only use a different linker command file.
*
* It's not really relevant, which symbol is checked. So pick
* stm32u5_init_octospi at random.
*/
if ( stm32u5_init_octospi < stm32u5_memory_octospi_1_begin ||
stm32u5_init_octospi > stm32u5_memory_octospi_1_end ) {
SystemInit();
SystemCoreClockUpdate();
stm32u5_rcc_power_clock_enable();
stm32u5_init_oscillator();
stm32u5_init_clocks();
stm32u5_init_power();
stm32u5_init_peripheral_clocks();
}
HAL_Init();
}
void BSP_START_TEXT_SECTION bsp_start_hook_1( void )
{
/* Init OctoSPI only if we are not running from it */
/*
* Init OctoSPI only if we are not running from it. See start hook 0 for
* details.
*/
if ( stm32u5_init_octospi < stm32u5_memory_octospi_1_begin ||
stm32u5_init_octospi > stm32u5_memory_octospi_1_end ) {
stm32u5_init_octospi();