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feat(stm32mp1): add stm32_get_boot_interface function 

Add function stm32_get_boot_interface to get the current boot interface
from information saved in the TAMP register.

Change-Id: I23af43c68eeaebe4c45920a57d739117aea3fbb1
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
This commit is contained in:
Yann Gautier 2020-12-16 12:04:06 +01:00
parent 4dc77a35e3
commit a6bfa75cf2
2 changed files with 21 additions and 1 deletions
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3
plat/st/common/include/stm32mp_common.h
View File

@ -115,7 +115,8 @@ int stm32mp_check_header(boot_api_image_header_t *header, uintptr_t buffer);
int stm32mp_map_ddr_non_cacheable(void);
int stm32mp_unmap_ddr(void);
/* Function to save boot peripheral info */
/* Functions to save and get boot peripheral info */
void stm32_save_boot_interface(uint32_t interface, uint32_t instance);
void stm32_get_boot_interface(uint32_t *interface, uint32_t *instance);
#endif /* STM32MP_COMMON_H */

19
plat/st/stm32mp1/stm32mp1_private.c
View File

@ -575,3 +575,22 @@ void stm32_save_boot_interface(uint32_t interface, uint32_t instance)
stm32mp_clk_disable(RTCAPB);
}
void stm32_get_boot_interface(uint32_t *interface, uint32_t *instance)
{
static uint32_t itf;
if (itf == 0U) {
uint32_t bkpr = tamp_bkpr(TAMP_BOOT_MODE_BACKUP_REG_ID);
stm32mp_clk_enable(RTCAPB);
itf = (mmio_read_32(bkpr) & TAMP_BOOT_MODE_ITF_MASK) >>
TAMP_BOOT_MODE_ITF_SHIFT;
stm32mp_clk_disable(RTCAPB);
}
*interface = itf >> 4;
*instance = itf & 0xFU;
}