[U-Boot] [PATCH 3/4] stm32: use armv7m MPU configuration support
Vikas Manocha
vikas.manocha at st.com
Wed May 3 23:38:56 UTC 2017
Signed-off-by: Vikas Manocha <vikas.manocha at st.com>
---
arch/arm/mach-stm32/stm32f4/soc.c | 16 +++++-----
arch/arm/mach-stm32/stm32f7/soc.c | 64 ++++++++-------------------------------
2 files changed, 22 insertions(+), 58 deletions(-)
diff --git a/arch/arm/mach-stm32/stm32f4/soc.c b/arch/arm/mach-stm32/stm32f4/soc.c
index b5d06db..3f45a25 100644
--- a/arch/arm/mach-stm32/stm32f4/soc.c
+++ b/arch/arm/mach-stm32/stm32f4/soc.c
@@ -7,7 +7,7 @@
#include <common.h>
#include <asm/io.h>
-#include <asm/armv7m.h>
+#include <asm/armv7m_mpu.h>
#include <asm/arch/stm32.h>
u32 get_cpu_rev(void)
@@ -17,17 +17,19 @@ u32 get_cpu_rev(void)
int arch_cpu_init(void)
{
+ struct mpu_region_config stm32_region_config[] = {
+ { 0x00000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
+ STRONG_ORDER, REGION_4GB },
+ };
configure_clocks();
-
/*
* Configure the memory protection unit (MPU) to allow full access to
* the whole 4GB address space.
*/
- writel(0, &V7M_MPU->rnr);
- writel(0, &V7M_MPU->rbar);
- writel((V7M_MPU_RASR_AP_RW_RW | V7M_MPU_RASR_SIZE_4GB
- | V7M_MPU_RASR_EN), &V7M_MPU->rasr);
- writel(V7M_MPU_CTRL_ENABLE | V7M_MPU_CTRL_HFNMIENA, &V7M_MPU->ctrl);
+ disable_mpu();
+ for (int i = 0; i < ARRAY_SIZE(stm32_region_config); i++)
+ mpu_config(&stm32_region_config[i]);
+ enable_mpu();
return 0;
}
diff --git a/arch/arm/mach-stm32/stm32f7/soc.c b/arch/arm/mach-stm32/stm32f7/soc.c
index 6f9704a..3586133 100644
--- a/arch/arm/mach-stm32/stm32f7/soc.c
+++ b/arch/arm/mach-stm32/stm32f7/soc.c
@@ -7,7 +7,7 @@
#include <common.h>
#include <asm/io.h>
-#include <asm/armv7m.h>
+#include <asm/armv7m_mpu.h>
#include <asm/arch/stm32.h>
u32 get_cpu_rev(void)
@@ -17,56 +17,18 @@ u32 get_cpu_rev(void)
int arch_cpu_init(void)
{
- /*
- * Configure the memory protection unit (MPU)
- * 0x00000000 - 0xffffffff: Strong-order, Shareable
- * 0xC0000000 - 0xC0800000: Normal, Outer and inner Non-cacheable
- */
-
- /* Disable MPU */
- writel(0, &V7M_MPU->ctrl);
-
- writel(
- 0x00000000 /* address */
- | 1 << 4 /* VALID */
- | 0 << 0 /* REGION */
- , &V7M_MPU->rbar
- );
-
- /* Strong-order, Shareable */
- /* TEX=000, S=1, C=0, B=0*/
- writel(
- (V7M_MPU_RASR_XN_ENABLE
- | V7M_MPU_RASR_AP_RW_RW
- | 0x01 << V7M_MPU_RASR_S_SHIFT
- | 0x00 << V7M_MPU_RASR_TEX_SHIFT
- | V7M_MPU_RASR_SIZE_4GB
- | V7M_MPU_RASR_EN)
- , &V7M_MPU->rasr
- );
-
- writel(
- 0xC0000000 /* address */
- | 1 << 4 /* VALID */
- | 1 << 0 /* REGION */
- , &V7M_MPU->rbar
- );
-
- /* Normal, Outer and inner Non-cacheable */
- /* TEX=001, S=0, C=0, B=0*/
- writel(
- (V7M_MPU_RASR_XN_ENABLE
- | V7M_MPU_RASR_AP_RW_RW
- | 0x01 << V7M_MPU_RASR_TEX_SHIFT
- | 0x01 << V7M_MPU_RASR_B_SHIFT
- | 0x01 << V7M_MPU_RASR_C_SHIFT
- | V7M_MPU_RASR_SIZE_8MB
- | V7M_MPU_RASR_EN)
- , &V7M_MPU->rasr
- );
-
- /* Enable MPU */
- writel(V7M_MPU_CTRL_ENABLE | V7M_MPU_CTRL_HFNMIENA, &V7M_MPU->ctrl);
+ struct mpu_region_config stm32_region_config[] = {
+ { 0x00000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
+ STRONG_ORDER, REGION_4GB },
+
+ { 0xC0000000, REGION_1, XN_DIS, PRIV_RW_USR_RW,
+ O_I_WB_RD_WR_ALLOC, REGION_8MB },
+ };
+
+ disable_mpu();
+ for (int i = 0; i < ARRAY_SIZE(stm32_region_config); i++)
+ mpu_config(&stm32_region_config[i]);
+ enable_mpu();
return 0;
}
--
1.9.1
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