From 16f6cb4c3fa1695ef4ebec9c8b3d500baa4a5ceb Mon Sep 17 00:00:00 2001 From: Patrice Chotard Date: Fri, 26 Apr 2019 10:52:51 +0200 Subject: [PATCH] mach-stm32: Add MPU region for spi-nor memory mapped region The Quad-SPI interface is able to manage up to 256Mbytes Flash memory starting from 0x90000000 to 0x9FFFFFFF in the memory mapped mode. Add a dedicated MPU region into stm32_region_config. See application note AN4760 available at www.st.com Signed-off-by: Patrice Chotard --- arch/arm/mach-stm32/soc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/mach-stm32/soc.c b/arch/arm/mach-stm32/soc.c index 738305caed..6ae31d3a1f 100644 --- a/arch/arm/mach-stm32/soc.c +++ b/arch/arm/mach-stm32/soc.c @@ -21,6 +21,9 @@ int arch_cpu_init(void) O_I_WB_RD_WR_ALLOC, REGION_16MB }, #endif + { 0x90000000, REGION_1, XN_DIS, PRIV_RW_USR_RW, + SHARED_WRITE_BUFFERED, REGION_256MB }, + #if defined(CONFIG_STM32F7) || defined(CONFIG_STM32H7) { 0xC0000000, REGION_0, XN_DIS, PRIV_RW_USR_RW, O_I_WB_RD_WR_ALLOC, REGION_512MB }, -- 2.25.1