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ARM: debug: stm32: add UART early console support for STM32H7 

Add support of early console for STM32H7. Default UART instance is USART1,
but other UART instances can be configured by setting physical and virtual
base addresses in menuconfig.

Signed-off-by: Erwan Le Ray <erwan.leray@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
This commit is contained in:
Erwan Le Ray 2020-02-03 15:04:24 +01:00 committed by Alexandre Torgue
parent 13f71fa885
commit 33cab8954a
2 changed files with 15 additions and 2 deletions
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15
arch/arm/Kconfig.debug
View File

@ -1223,6 +1223,18 @@ choice
If unsure, say N.
config STM32H7_DEBUG_UART
bool "Use STM32H7 UART for low-level debug"
depends on MACH_STM32H743
select DEBUG_STM32_UART
help
Say Y here if you want kernel low-level debugging support
on STM32H7 based platforms, which default UART is wired on
USART1, but another UART instance can be selected by modifying
CONFIG_DEBUG_UART_PHYS.
If unsure, say N.
config TEGRA_DEBUG_UART_AUTO_ODMDATA
bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
depends on ARCH_TEGRA
@ -1621,7 +1633,8 @@ config DEBUG_UART_PHYS
default 0x3e000000 if DEBUG_BCM_KONA_UART
default 0x3f201000 if DEBUG_BCM2836
default 0x4000e400 if DEBUG_LL_UART_EFM32
default 0x40011000 if STM32F4_DEBUG_UART || STM32F7_DEBUG_UART
default 0x40011000 if STM32F4_DEBUG_UART || STM32F7_DEBUG_UART || \
STM32H7_DEBUG_UART
default 0x40028000 if DEBUG_AT91_SAMV7_USART1
default 0x40081000 if DEBUG_LPC18XX_UART0
default 0x40090000 if DEBUG_LPC32XX

2
arch/arm/include/debug/stm32.S
View File

@ -9,7 +9,7 @@
#define STM32_USART_TDR_OFF 0x04
#endif
#ifdef CONFIG_STM32F7_DEBUG_UART
#if defined(CONFIG_STM32F7_DEBUG_UART) || defined(CONFIG_STM32H7_DEBUG_UART)
#define STM32_USART_SR_OFF 0x1C
#define STM32_USART_TDR_OFF 0x28
#endif