feat(stm32mp1): add "Boot mode" management for STM32MP13
Add new APIs to enter and exit "boot mode".
In this mode a potential tamper won't block access or reset
the secure IPs needed while boot, without this mode a dead
lock may occurs.
Change-Id: Iad60d4a0420ec125b842a285f73a20eb54cd1828
Signed-off-by: Nicolas Toromanoff <nicolas.toromanoff@st.com>
diff --git a/plat/st/stm32mp1/include/stm32mp1_private.h b/plat/st/stm32mp1/include/stm32mp1_private.h
index 7bdb36d..23934e9 100644
--- a/plat/st/stm32mp1/include/stm32mp1_private.h
+++ b/plat/st/stm32mp1/include/stm32mp1_private.h
@@ -23,6 +23,14 @@
void stm32mp1_syscfg_disable_io_compensation(void);
uint32_t stm32mp1_syscfg_get_chip_version(void);
uint32_t stm32mp1_syscfg_get_chip_dev_id(void);
+#if STM32MP13
+void stm32mp1_syscfg_boot_mode_enable(void);
+void stm32mp1_syscfg_boot_mode_disable(void);
+#endif
+#if STM32MP15
+static inline void stm32mp1_syscfg_boot_mode_enable(void){}
+static inline void stm32mp1_syscfg_boot_mode_disable(void){}
+#endif
void stm32mp1_deconfigure_uart_pins(void);
diff --git a/plat/st/stm32mp1/stm32mp1_syscfg.c b/plat/st/stm32mp1/stm32mp1_syscfg.c
index 39ad90b..ff79428 100644
--- a/plat/st/stm32mp1/stm32mp1_syscfg.c
+++ b/plat/st/stm32mp1/stm32mp1_syscfg.c
@@ -24,6 +24,7 @@
* SYSCFG REGISTER OFFSET (base relative)
*/
#define SYSCFG_BOOTR 0x00U
+#define SYSCFG_BOOTCR 0x0CU
#if STM32MP15
#define SYSCFG_IOCTRLSETR 0x18U
#define SYSCFG_ICNR 0x1CU
@@ -55,6 +56,11 @@
#endif
/*
+ * SYSCFG_BOOTCR Register
+ */
+#define SYSCFG_BOOTCR_BMEN BIT(0)
+
+/*
* SYSCFG_IOCTRLSETR Register
*/
#define SYSCFG_IOCTRLSETR_HSLVEN_TRACE BIT(0)
@@ -391,3 +397,15 @@
{
return mmio_read_32(SYSCFG_BASE + SYSCFG_IDC) & SYSCFG_IDC_DEV_ID_MASK;
}
+
+#if STM32MP13
+void stm32mp1_syscfg_boot_mode_enable(void)
+{
+ mmio_setbits_32(SYSCFG_BASE + SYSCFG_BOOTCR, SYSCFG_BOOTCR_BMEN);
+}
+
+void stm32mp1_syscfg_boot_mode_disable(void)
+{
+ mmio_clrbits_32(SYSCFG_BASE + SYSCFG_BOOTCR, SYSCFG_BOOTCR_BMEN);
+}
+#endif