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stm32mp1: save boot information in backup registers

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This will be used by BL33 to get boot device and instance.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Mathieu Belou <mathieu.belou@st.com>
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
This commit is contained in:
Yann Gautier 2018-07-20 11:36:05 +02:00
parent 6a339a4952
commit e58a53fb72
5 changed files with 80 additions and 0 deletions
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10
plat/st/stm32mp1/bl2_plat_setup.c
View file

@ -19,6 +19,7 @@
#include <stm32mp1_clk.h>
#include <stm32mp1_dt.h>
#include <stm32mp1_private.h>
#include <stm32mp1_context.h>
#include <stm32mp1_pwr.h>
#include <stm32mp1_rcc.h>
#include <string.h>
@ -37,6 +38,9 @@ void bl2_platform_setup(void)
void bl2_el3_plat_arch_setup(void)
{
boot_api_context_t *boot_context =
(boot_api_context_t *)stm32mp1_get_boot_ctx_address();
/*
* Disable the backup domain write protection.
* The protection is enable at each reset by hardware
@ -90,5 +94,11 @@ void bl2_el3_plat_arch_setup(void)
panic();
}
if (stm32_save_boot_interface(boot_context->boot_interface_selected,
boot_context->boot_interface_instance) !=
0) {
ERROR("Cannot save boot interface\n");
}
stm32mp1_io_setup();
}

14
plat/st/stm32mp1/include/stm32mp1_context.h Normal file
View file

@ -0,0 +1,14 @@
/*
* Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef __STM32MP1_CONTEXT_H__
#define __STM32MP1_CONTEXT_H__
#include <stdint.h>
int stm32_save_boot_interface(uint32_t interface, uint32_t instance);
#endif /* __STM32MP1_CONTEXT_H__ */

1
plat/st/stm32mp1/platform.mk
View file

@ -43,6 +43,7 @@ PLAT_BL_COMMON_SOURCES += ${LIBFDT_SRCS} \
drivers/st/clk/stm32mp1_clkfunc.c \
drivers/st/gpio/stm32_gpio.c \
drivers/st/reset/stm32mp1_reset.c \
plat/st/stm32mp1/stm32mp1_context.c \
plat/st/stm32mp1/stm32mp1_dt.c \
plat/st/stm32mp1/stm32mp1_helper.S

42
plat/st/stm32mp1/stm32mp1_context.c Normal file
View file

@ -0,0 +1,42 @@
/*
* Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <dt-bindings/clock/stm32mp1-clks.h>
#include <errno.h>
#include <mmio.h>
#include <platform_def.h>
#include <stm32mp1_clk.h>
#include <stm32mp1_context.h>
#define TAMP_BOOT_ITF_BACKUP_REG_ID U(20)
#define TAMP_BOOT_ITF_MASK U(0x0000FF00)
#define TAMP_BOOT_ITF_SHIFT 8
int stm32_save_boot_interface(uint32_t interface, uint32_t instance)
{
uint32_t tamp_clk_off = 0;
uint32_t bkpr_itf_idx = tamp_bkpr(TAMP_BOOT_ITF_BACKUP_REG_ID);
if (!stm32mp1_clk_is_enabled(RTCAPB)) {
tamp_clk_off = 1;
if (stm32mp1_clk_enable(RTCAPB) != 0) {
return -EINVAL;
}
}
mmio_clrsetbits_32(bkpr_itf_idx,
TAMP_BOOT_ITF_MASK,
((interface << 4) | (instance & 0xFU)) <<
TAMP_BOOT_ITF_SHIFT);
if (tamp_clk_off != 0U) {
if (stm32mp1_clk_disable(RTCAPB) != 0) {
return -EINVAL;
}
}
return 0;
}

13
plat/st/stm32mp1/stm32mp1_def.h
View file

@ -157,6 +157,19 @@ enum ddr_type {
#define STM32MP1_EMMC_NORMAL_SPEED_MAX_FREQ 26000000 /*26 MHz*/
#define STM32MP1_EMMC_HIGH_SPEED_MAX_FREQ 52000000 /*52 MHz*/
/*******************************************************************************
* STM32MP1 TAMP
******************************************************************************/
#define TAMP_BASE U(0x5C00A000)
#define TAMP_BKP_REGISTER_BASE (TAMP_BASE + U(0x100))
#if !(defined(__LINKER__) || defined(__ASSEMBLY__))
static inline uint32_t tamp_bkpr(uint32_t idx)
{
return TAMP_BKP_REGISTER_BASE + (idx << 2);
}
#endif
/*******************************************************************************
* STM32MP1 DDRCTRL
******************************************************************************/