refactor(st): move boot backup register management
This backup register used to pass boot information to BL33, has the
same mapping for ST platforms. Its management can then be moved to
common directory.
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: Ic873f099c1f87c6ba2825b4946365ae6a9687798
diff --git a/plat/st/common/include/stm32mp_common.h b/plat/st/common/include/stm32mp_common.h
index a5316b6..54cfcfb 100644
--- a/plat/st/common/include/stm32mp_common.h
+++ b/plat/st/common/include/stm32mp_common.h
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2018-2022, STMicroelectronics - All Rights Reserved
+ * Copyright (C) 2018-2023, STMicroelectronics - All Rights Reserved
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -113,12 +113,12 @@
int stm32mp_map_ddr_non_cacheable(void);
int stm32mp_unmap_ddr(void);
-/* Functions to save and get boot peripheral info */
-void stm32_save_boot_interface(uint32_t interface, uint32_t instance);
+/* Function to save boot info */
+void stm32_save_boot_info(boot_api_context_t *boot_context);
+/* Function to get boot peripheral info */
void stm32_get_boot_interface(uint32_t *interface, uint32_t *instance);
-
-/* Functions to save and get boot authentication status and partition used */
-void stm32_save_boot_auth(uint32_t auth_status, uint32_t boot_partition);
+/* Function to get BOOT_MODE backup register address */
+uintptr_t stm32_get_bkpr_boot_mode_addr(void);
#if PSA_FWU_SUPPORT
void stm32mp1_fwu_set_boot_idx(void);
diff --git a/plat/st/common/stm32mp_common.c b/plat/st/common/stm32mp_common.c
index bb56bac..9b790c2 100644
--- a/plat/st/common/stm32mp_common.c
+++ b/plat/st/common/stm32mp_common.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015-2022, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2023, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -14,6 +14,7 @@
#include <drivers/st/stm32_console.h>
#include <drivers/st/stm32mp_clkfunc.h>
#include <drivers/st/stm32mp_reset.h>
+#include <lib/mmio.h>
#include <lib/smccc.h>
#include <lib/xlat_tables/xlat_tables_v2.h>
#include <plat/common/platform.h>
@@ -24,6 +25,15 @@
#define HEADER_VERSION_MAJOR_MASK GENMASK(23, 16)
#define RESET_TIMEOUT_US_1MS 1000U
+#define BOOT_AUTH_MASK GENMASK_32(23, 20)
+#define BOOT_AUTH_SHIFT 20
+#define BOOT_PART_MASK GENMASK_32(19, 16)
+#define BOOT_PART_SHIFT 16
+#define BOOT_ITF_MASK GENMASK_32(15, 12)
+#define BOOT_ITF_SHIFT 12
+#define BOOT_INST_MASK GENMASK_32(11, 8)
+#define BOOT_INST_SHIFT 8
+
static console_t console;
uintptr_t plat_get_ns_image_entrypoint(void)
@@ -277,3 +287,55 @@
{
return (int32_t)(stm32mp_get_chip_version() & SOC_ID_REV_MASK);
}
+
+void stm32_save_boot_info(boot_api_context_t *boot_context)
+{
+ uint32_t auth_status;
+
+ assert(boot_context->boot_interface_instance <= (BOOT_INST_MASK >> BOOT_INST_SHIFT));
+ assert(boot_context->boot_interface_selected <= (BOOT_ITF_MASK >> BOOT_ITF_SHIFT));
+ assert(boot_context->boot_partition_used_toboot <= (BOOT_PART_MASK >> BOOT_PART_SHIFT));
+
+ switch (boot_context->auth_status) {
+ case BOOT_API_CTX_AUTH_NO:
+ auth_status = 0x0U;
+ break;
+
+ case BOOT_API_CTX_AUTH_SUCCESS:
+ auth_status = 0x2U;
+ break;
+
+ case BOOT_API_CTX_AUTH_FAILED:
+ default:
+ auth_status = 0x1U;
+ break;
+ }
+
+ clk_enable(TAMP_BKP_REG_CLK);
+
+ mmio_clrsetbits_32(stm32_get_bkpr_boot_mode_addr(),
+ BOOT_ITF_MASK | BOOT_INST_MASK | BOOT_PART_MASK | BOOT_AUTH_MASK,
+ (boot_context->boot_interface_instance << BOOT_INST_SHIFT) |
+ (boot_context->boot_interface_selected << BOOT_ITF_SHIFT) |
+ (boot_context->boot_partition_used_toboot << BOOT_PART_SHIFT) |
+ (auth_status << BOOT_AUTH_SHIFT));
+
+ clk_disable(TAMP_BKP_REG_CLK);
+}
+
+void stm32_get_boot_interface(uint32_t *interface, uint32_t *instance)
+{
+ static uint32_t itf;
+
+ if (itf == 0U) {
+ clk_enable(TAMP_BKP_REG_CLK);
+
+ itf = mmio_read_32(stm32_get_bkpr_boot_mode_addr()) &
+ (BOOT_ITF_MASK | BOOT_INST_MASK);
+
+ clk_disable(TAMP_BKP_REG_CLK);
+ }
+
+ *interface = (itf & BOOT_ITF_MASK) >> BOOT_ITF_SHIFT;
+ *instance = (itf & BOOT_INST_MASK) >> BOOT_INST_SHIFT;
+}