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soc: infineon: cyw20829: Adding MPU memory permission to userspace app

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Adds additional MPU memory permissions to userspace applications by
default.  This change addresses an MPU fault encountered when running
tests/kernel/common and tests/drivers/adc/adc_api.

This approach opens additional memory locations up to user space access.
This assumes that end users of applications will tune the MPU regions for
the needs of that application.

Signed-off-by: John Batch <john.batch@infineon.com>
This commit is contained in:
John Batch 2025-07-07 10:27:28 -07:00 committed by Chris Friedt
parent a39285b720
commit 99860e7339
2 changed files with 23 additions and 6 deletions
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15
dts/arm/infineon/cat1b/cyw20829/cyw20829.dtsi
View File

@ -45,11 +45,11 @@
reg = <0x20000000 SRAM0_SIZE>;
/* SRAM aliased address path */
sram_sahb: sram_bus_alias@20000000 {
sram_sahb: sram_sahb@20000000 {
reg = <0x20000000 SRAM0_SIZE>; /* SAHB address */
};
sram_cbus: sram_bus_alias@4000000 {
sram_cbus: sram_cbus@4000000 {
reg = <0x04000000 SRAM0_SIZE>; /* CBUS address */
};
};
@ -59,9 +59,20 @@
* (e.g. 0x20000000 + 0x40000 - 12K (0x3000) = 0x2003D000)
*/
sram_bootstrap: memory@2003D000 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "zephyr,memory-region", "mmio-sram";
zephyr,memory-region = "BOOTSTRAP_RAM";
reg = <0x2003D000 BOOTSTRAP_SIZE>;
/* SRAM aliased address path */
sram_bootstrap_sahb: sram_bootstrap_sahb@2003D000 {
reg = <0x2003D000 BOOTSTRAP_SIZE>; /* SAHB address */
};
sram_bootstrap_cbus: sram_bootstrap_cbus@403D000 {
reg = <0x0403D000 BOOTSTRAP_SIZE>; /* CBUS address */
};
};
qspi_flash: qspi_flash@40890000 {

14
soc/infineon/cat1b/cyw20829/mpu_regions.c
View File

@ -7,8 +7,9 @@
#include <zephyr/devicetree.h>
#include <zephyr/arch/arm/cortex_m/arm_mpu_mem_cfg.h>
#define BOOTSTRAP_RAM_BASE_ADDRESS DT_REG_ADDR(DT_NODELABEL(sram_bootstrap))
#define BOOTSTRAP_RAM_SIZE DT_REG_SIZE(DT_NODELABEL(sram_bootstrap))
#define BOOTSTRAP_SAHB_RAM_BASE_ADDRESS DT_REG_ADDR(DT_NODELABEL(sram_bootstrap_sahb))
#define BOOTSTRAP_CBUS_RAM_BASE_ADDRESS DT_REG_ADDR(DT_NODELABEL(sram_bootstrap_cbus))
#define BOOTSTRAP_RAM_SIZE DT_REG_SIZE(DT_NODELABEL(sram_bootstrap))
#define REGION_BOOTSTRAP_RAM_ATTR(base, size) \
{ \
@ -24,8 +25,13 @@ static const struct arm_mpu_region mpu_regions[] = {
MPU_REGION_ENTRY("SRAM", CONFIG_SRAM_BASE_ADDRESS,
REGION_RAM_ATTR(CONFIG_SRAM_BASE_ADDRESS, CONFIG_SRAM_SIZE * 1024)),
MPU_REGION_ENTRY("BOOTSTRAP_RAM", BOOTSTRAP_RAM_BASE_ADDRESS,
REGION_BOOTSTRAP_RAM_ATTR(BOOTSTRAP_RAM_BASE_ADDRESS, BOOTSTRAP_RAM_SIZE)),
MPU_REGION_ENTRY(
"BOOTSTRAP_SAHB_RAM", BOOTSTRAP_SAHB_RAM_BASE_ADDRESS,
REGION_BOOTSTRAP_RAM_ATTR(BOOTSTRAP_SAHB_RAM_BASE_ADDRESS, BOOTSTRAP_RAM_SIZE)),
MPU_REGION_ENTRY(
"BOOTSTRAP_CBUS_RAM", BOOTSTRAP_CBUS_RAM_BASE_ADDRESS,
REGION_BOOTSTRAP_RAM_ATTR(BOOTSTRAP_CBUS_RAM_BASE_ADDRESS, BOOTSTRAP_RAM_SIZE)),
};
const struct arm_mpu_config mpu_config = {