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mcux: C40 flash (S32K3x): run mutating ops from SRAM for XIP; add S32K344 array geometry header #618

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mcux: C40 flash (S32K3x): run mutating ops from SRAM for XIP; add S32K344 array geometry header #618

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25a2244
hal/nxp: mcux: flash_c40: add SoC features header and minor cleanups
sumitbatra-nxp Oct 11, 2025
a21e4f4
mcux: flash_c40: run mutating ops from SRAM (__ramfunc) for XIP
sumitbatra-nxp Oct 11, 2025
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18 changes: 13 additions & 5 deletions mcux/mcux-sdk-ng/drivers/flash_c40/fsl_c40_flash.c
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Original file line number Diff line number Diff line change
Expand Up @@ -21,12 +21,20 @@
#include "fsl_c40_flash.h"
#include "fsl_common.h"
#include "fsl_device_registers.h"
#include "fsl_c40_flash_features.h"


/*******************************************************************************
* Definitions
******************************************************************************/

#if !defined(FLASH) && defined(IP_FLASH)
#define FLASH IP_FLASH /* Define a local alias for C40 flash memory */
#endif
#if !defined(PFLASH) && defined(IP_PFLASH)
#define PFLASH IP_PFLASH /* Define a local alias for flash memory controller */
#endif

/* Component ID definition, used by tools. */
#ifndef FSL_COMPONENT_ID
#define FSL_COMPONENT_ID "platform.drivers.flash_c40"
Expand Down Expand Up @@ -746,7 +754,7 @@ status_t FLASH_Init(flash_config_t *config)
return ret;
}

status_t FLASH_Erase(flash_config_t *config, uint32_t start, uint32_t lengthInBytes, uint32_t key)
RAMFUNC status_t FLASH_Erase(flash_config_t *config, uint32_t start, uint32_t lengthInBytes, uint32_t key)
{
status_t ret;
uint32_t sectorNumStart;
Expand Down Expand Up @@ -795,9 +803,9 @@ status_t FLASH_Erase(flash_config_t *config, uint32_t start, uint32_t lengthInBy
return ret;
}

status_t FLASH_Program(flash_config_t *config, uint32_t start, uint32_t *src, uint32_t lengthInBytes)
RAMFUNC status_t FLASH_Program(flash_config_t *config, uint32_t start, uint32_t *src, uint32_t lengthInBytes)
{
status_t ret;
status_t ret = kStatus_FLASH_Success;
size_t chunkSize;
size_t sizeLeft = lengthInBytes;
uint8_t *src8 = (uint8_t *) src;
Expand Down Expand Up @@ -848,7 +856,7 @@ status_t FLASH_Program(flash_config_t *config, uint32_t start, uint32_t *src, ui
return ret;
}

status_t FLASH_SetSectorProtection(flash_config_t *config, uint32_t address, bool locked)
RAMFUNC status_t FLASH_SetSectorProtection(flash_config_t *config, uint32_t address, bool locked)
{
status_t ret;
uint32_t sectorNum;
Expand Down Expand Up @@ -878,4 +886,4 @@ status_t FLASH_GetSectorProtection(flash_config_t *config, uint32_t address)
}

return C40_SectorLockStatus(sectorNum);
}
}
27 changes: 27 additions & 0 deletions mcux/mcux-sdk-ng/drivers/flash_c40/fsl_c40_flash_features.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,27 @@
/*
* Copyright 2025 NXP
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*
*/

#ifndef FSL_C40_FLASH_FEATURES_H_
#define FSL_C40_FLASH_FEATURES_H_

#include "fsl_common.h"

/* Differences in flash array for different S32K3 variants can be added in elif conditions */
#if defined(CPU_S32K344)

/* Code flash: 4 MiB total => 4 blocks × 1 MiB each */
#define FSL_FEATURE_FLASH_C40_BLOCK_SIZE_CODE (1024 * 1024)
#define FSL_FEATURE_FLASH_C40_BLOCK_COUNT_CODE (4)
/* Data flash: 256 KiB */
#define FSL_FEATURE_FLASH_C40_BLOCK_SIZE_DATA (256 * 1024)
#else
#error "C40 feature macros not defined for this SoC."

#endif

#endif /* FSL_C40_FLASH_FEATURES_H_ */