BGCRC Module

The BackGround CRC (BGCRC) API provides a set of functions for configuring the BGCRC module. It provides various functions to configure the memory blocks to be checked, the mode of operation, interrupt/NMI configuration and to start, resume and halt the BGCRC omputation

group bgcrc_api

This module is used for configuring BGCRC.

Defines

BGCRC_NMI_ENABLE 0x5U

Generate NMI on memory check failure.

Values that can be passed to BGCRC_setConfig() as the nmiConfig parameter

BGCRC_NMI_DISABLE 0xAU

failure

Do not generate NMI on memory check

BGCRC_EMUCTRL_SOFT 0x00U

Values that can be passed to BGCRC_setConfig() as the emuCtrl parameter.

CRC module and CRC watchdog stops immediately on DEBUG SUSPEND

BGCRC_EMUCTRL_FREE 0x10U

not affected by DEBUG HALT

CRC calculation and CRC watchdog is

BGCRC_SCRUB_MODE 0xAU

Values that can be passed to BGCRC_setRegion() as the mode parameter.

CRC of data is not compared with the golden CRC. Error check is done using the ECC/Parity logic.

BGCRC_CRC_MODE 0x5U

CRC value is compared with golden CRC at the end in addition to the data correctness check by ECC/Parity logic

BGCRC_GLOBAL_INT 0x01U

Global Interrupt.

Values that can be passed to all interrupt/NMI functions as intflags or nmiflags parameter

BGCRC_TEST_DONE 0x02U

Test done interrupt.

BGCRC_CRC_FAIL 0x04U

CRC Fail Interrupt/NMI.

BGCRC_UNCORR_ERR 0x08U

Uncorrectable Error Interrupt/NMI.

BGCRC_CORR_ERR 0x10U

Correctable Error Interrupt/NMI.

BGCRC_WD_UNDERFLOW 0x20U

Watchdog Underflow Error Interrupt/NMI.

BGCRC_WD_OVERFLOW 0x40U

Watchdog Overflow Error Interrupt/NMI.

BGCRC_ALL_ERROR_FLAGS (BGCRC_CRC_FAIL | BGCRC_UNCORR_ERR

| \

BGCRC_CORR_ERR | BGCRC_WD_UNDERFLOW

| \

BGCRC_WD_OVERFLOW)
BGCRC_SIZE_BYTES_0 0U

Values that can be passed to BGCRC_setRegion as the blockSize parameter For example, to configure a region of size 2.5KB, set blockSize as BGCRC_SIZE_KBYTES(2) + BGCRC_SIZE_BYTES_512

BGCRC_SIZE_BYTES_256 1U
BGCRC_SIZE_BYTES_512 2U
BGCRC_SIZE_BYTES_768 3U
BGCRC_SIZE_KBYTES(x) (4U * (x))
BGCRC_ACTIVE 0x80000000U

Values returned by the function BGCRC_getRunStatus.

BGCRC_IDLE 0x00000000U
BGCRC_REG_EN 0x00000001U

Values that can be passed to BGCRC_lockRegister(), BGCRC_unlockRegister() and BGCRC_commitLockRegister() as the regs parameter

BGCRC_REG_CTRL1 0x00000002U
BGCRC_REG_CTRL2 0x00000004U
BGCRC_REG_START_ADDR 0x00000008U
BGCRC_REG_SEED 0x00000010U
BGCRC_REG_GOLDEN 0x00000080U
BGCRC_REG_WD_CFG 0x00004000U
BGCRC_REG_WD_MIN 0x00008000U
BGCRC_REG_WD_MAX 0x00010000U
BGCRC_REG_NMIFRC 0x00800000U
BGCRC_REG_INTEN 0x04000000U
BGCRC_REG_INTFRC 0x20000000U
BGCRC_REG_ALL 0xFFFFFFFFU
BGCRC_WD_ENABLE 0x5U

Values that are used by the BGCRC APIs.

BGCRC_WD_DISABLE 0xAU
BGCRC_START_KEY 0xAU
BGCRC_HALT_KEY 0xAU

Functions

void BGCRC_setConfig(uint32_t base, uint32_t nmiConfig, uint32_t emuCtrl)

Sets the NMI and emulation control configurations

This function configures the NMI and emulation control configurations for the BGCRC module.

Parameters

  • base: is the BGCRC module base address.

  • nmiConfig: specifies whether NMI needs to be enabled or not for memory check failure

  • emuCtrl: specifies the behaviour of CRC during emulation

nmiConfig can take values BGCRC_NMI_ENABLE or BGCRC_NMI_DISABLE. NMI is enabled by default for the memory check failures.

emuCtrl can take values BGCRC_EMUCTRL_FREE or BGCRC_EMUCTRL_SOFT.

Return

None.

void BGCRC_enableWatchdog(uint32_t base)

Enables the watchdog

This function enables the BGCRC watchdog timer. The counter is started when the BGCRC test starts

Parameters

  • base: is the BGCRC module base address.

Note

The watchDog window can be configured using the function BGCRC_setWatchdogWindow()

Return

None.

void BGCRC_disableWatchdog(uint32_t base)

Disables the watchdog

This function disables the BGCRC watchdog.

Parameters

  • base: is the BGCRC module base address.

Return

None.

void BGCRC_setWatchdogWindow(uint32_t base, uint32_t min, uint32_t max)

Configures the BGCRC watchdog window

This function configures the BGCRC windowed watchdog

Parameters

  • base: is the BGCRC module base address.

  • min: is minimum value configuration for the windowed watchdog

  • max: is maximum value configuration for the windowed watchdog

Return

None.

void BGCRC_setRegion(uint32_t base, uint32_t startAddr, uint32_t blockSize, uint32_t mode)

Configures the memory region for check

This function configures the memory region to be checked

Parameters

  • base: is the BGCRC module base address.

  • startAddr: is the start address of the block

  • blockSize: is the size of the block

  • mode: is the BGCRC test mode

blockSize can take values BGCRC_SIZE_KBYTES(x) and/or BGCRC_SIZE_BYTES_x. For example, to configure a region of size 2.5KB, set blockSize as BGCRC_SIZE_KBYTES(2) + BGCRC_SIZE_BYTES_512

mode can take values BGCRC_SCRUB_MODE or BGCRC_CRC_MODE. In Scrub mode, CRC of data is not compared with the golden CRC. Error check is done using the ECC/Parity logic. In CRC mode, value is compared with golden CRC at the end in addition to the data correctness check by ECC/Parity logic.

Return

None.

uint32_t BGCRC_getWatchdogCounterValue(uint32_t base)

Gets the BGCRC watchdog counter value

This function returns the BGCRC watchdog counter value

Parameters

  • base: is the BGCRC module base address.

Return

Watchdog counter value.

void BGCRC_enableInterrupt(uint32_t base, uint32_t intFlags)

Enables individual BGCRC interrupt sources

This function enables the indicated BGCRC interrupt sources. Only the sources that are enabled can be reflected to the processor interrupt, disabled sources have no effect on the processor.

Parameters

  • base: is the BGCRC module base address.

  • intFlags: is the bit mask of the interrupt sources to be disabled.

The intFlags parameter is the logical OR of any of the following:

  • BGCRC_TEST_DONE - Test done interrupt

  • BGCRC_CRC_FAIL - CRC Fail Interrupt

  • BGCRC_UNCORR_ERR - Uncorrectable Error Interrupt

  • BGCRC_CORR_ERR - Correctable Error Interrupt

  • BGCRC_WD_UNDERFLOW - Watchdog Underflow Error Interrupt

  • BGCRC_WD_OVERFLOW - Watchdog Overflow Error Interrupt

Return

None

void BGCRC_disableInterrupt(uint32_t base, uint32_t intFlags)

Disables individual BGCRC interrupt sources.

This function disables the indicated BGCRC interrupt sources. Only the sources that are enabled can be reflected to the processor interrupt disabled sources have no effect on the processor.

Parameters

  • base: is the BGCRC module base address.

  • intFlags: is the bit mask of the interrupt sources to be disabled.

The intFlags parameter has the same definition as the intFlags parameter to BGCRC_enableInterrupt().

Return

None.

uint32_t BGCRC_getInterruptStatus(uint32_t base)

Gets the current BGCRC interrupt status

This function returns the status of the BGCRC interrupts

Parameters

  • base: is the BGCRC module base address

  • BGCRC_GLOBAL_INT - Global Interrupt

  • BGCRC_TEST_DONE - Test done interrupt

  • BGCRC_CRC_FAIL - CRC Fail Interrupt

  • BGCRC_UNCORR_ERR - Uncorrectable Error Interrupt

  • BGCRC_CORR_ERR - Correctable Error Interrupt

  • BGCRC_WD_UNDERFLOW - Watchdog Underflow Error Interrupt

  • BGCRC_WD_OVERFLOW - Watchdog Overflow Error Interrupt

Return

The current interrupt status, which is a logical OR of any of the following:

void BGCRC_clearInterruptStatus(uint32_t base, uint32_t intFlags)

Clears the BGCRC interrupt sources

The specified BGCRC interrupt sources are cleared, so that they no longer assert. This function must be called in the interrupt handler to keep the interrupt from being triggered again immediately upon exit.

Parameters

  • base: is the BGCRC module base address

  • intFlags: is a bit mask of the interrupt sources to be cleared.

The intFlags parameter has the same definition as the intFlags parameter to BGCRC_getInterruptStatus().

Return

None.

void BGCRC_forceInterrupt(uint32_t base, uint32_t intFlags)

Force the BGCRC interrupt flag

This function forces the specified interrupt flags

Parameters

  • base: is the BGCRC module base address

  • intFlags: is a bit mask of the interrupt flags to be forced.

The intFlags parameter has the same definition as the intFlags parameter to BGCRC_enableInterrupt().

Return

None.

uint32_t BGCRC_getNMIStatus(uint32_t base)

Gets the current BGCRC NMI status

This function returns the status of the BGCRC NMI flags

Parameters

  • base: is the BGCRC module base address

  • BGCRC_CRC_FAIL - CRC Fail NMI

  • BGCRC_UNCORR_ERR - Uncorrectable Error NMI

  • BGCRC_CORR_ERR - Correctable Error NMI

  • BGCRC_WD_UNDERFLOW - Watchdog Underflow Error NMI

  • BGCRC_WD_OVERFLOW - Watchdog Overflow Error NMI

Return

The current NMI status, which is a logical OR of any of the following:

void BGCRC_clearNMIStatus(uint32_t base, uint32_t nmiFlags)

Clears the BGCRC NMI sources

The specified BGCRC NMI sources are cleared, so that they no longer assert. This function must be called in the NMI handler to keep the NMI from being triggered again immediately upon exit.

Parameters

  • base: is the BGCRC module base address

  • nmiFlags: is a bit mask of the NMI sources to be cleared.

The nmiFlags parameter has the same definition as the nmiFlags parameter to BGCRC_getNMIStatus().

Return

None.

void BGCRC_forceNMI(uint32_t base, uint32_t nmiFlags)

Force the BGCRC NMI flag

This function forces the specified interrupt flags

Parameters

  • base: is the BGCRC module base address

  • nmiFlags: is a bit mask of the NMI flags to be forced.

The nmiFlags parameter has the same definition as the nmiFlags parameter to BGCRC_getNMIStatus().

Return

None.

void BGCRC_setGoldenCRCValue(uint32_t base, uint32_t crcVal)

Sets the golden CRC value

This function sets the golden CRC value of the memory block being tested. If run in CRC mode, the calculated CRC value is compared with golden CRC and status is updated.

Parameters

  • base: is the BGCRC module base address

  • crcVal: is a golden CRC value to be programmed

Return

None.

void BGCRC_start(uint32_t base)

Starts the module operation

This function starts the module operation. Calling this function during the CRC calculation will reset and re-start the CRC calculation. This also resets the watchdog timer.

Parameters

  • base: is the BGCRC module base address

Return

None.

void BGCRC_halt(uint32_t base)

Halts the module operation

This function halts the module operation. This function does not stall the watchdog timer.

Parameters

  • base: is the BGCRC module base address

Return

None.

void BGCRC_resume(uint32_t base)

Resumes the module operation

This function resumes the module operation. The CRC calculation will continue/resume from where it was halted

Parameters

  • base: is the BGCRC module base address

Return

None.

uint32_t BGCRC_getRunStatus(uint32_t base)

Gets the running status of the module

This function returns whether the module is in ACTIVE or IDLE state

Parameters

  • base: is the BGCRC module base address

Return

BGCRC_ACTIVE if CRC module is active, BGCRC_IDLE if CRC module is idle

void BGCRC_setSeedValue(uint32_t base, uint32_t seed)

Sets the seed value for CRC calculations

This function sets the seed value for the CRC calculations

Parameters

  • base: is the BGCRC module base address

  • seed: is the seed value to be set

Return

None

uint32_t BGCRC_getResult(uint32_t base)

Gets the calculated CRC value

This function returns the calculated CRC value

Parameters

  • base: is the BGCRC module base address

Return

32-bit CRC result

uint32_t BGCRC_getCurrentAddress(uint32_t base)

Gets the current address

This function returns the current address from where the data is fetched

Parameters

  • base: is the BGCRC module base address

Return

32-bit address

void BGCRC_lockRegister(uint32_t base, uint32_t regs)

Locks the register configuration

This function locks the register configuration. The register once locked, cannot be updated until the lock is removed

Parameters

  • base: is the BGCRC module base address

  • regs: is the configuration registers to be locked

The regs parameter is the logical OR of any of the following:

  • BGCRC_REG_EN

  • BGCRC_REG_CTRL1

  • BGCRC_REG_CTRL2

  • BGCRC_REG_START_ADDR

  • BGCRC_REG_SEED

  • BGCRC_REG_GOLDEN

  • BGCRC_REG_WD_CFG

  • BGCRC_REG_WD_MIN

  • BGCRC_REG_WD_MAX

  • BGCRC_REG_NMIFRC

  • BGCRC_REG_INTEN

  • BGCRC_REG_INTFRC

  • BGCRC_REG_ALL

Return

None

void BGCRC_unlockRegister(uint32_t base, uint32_t regs)

Unlocks the register configuration

This function unlocks the register configuration.

Parameters

  • base: is the BGCRC module base address

  • regs: is the configuration registers to be unlocked

The regs parameter has the same definition as the regs parameter to BGCRC_lockRegister().

Return

None

void BGCRC_commitRegisterLock(uint32_t base, uint32_t regs)

Commits the register configuration

This function commits the register configuration. Once configuration is committed, only reset can change the configuration.

Parameters

  • base: is the BGCRC module base address

  • regs: is the configuration registers to be unlocked

The regs parameter has the same definition as the regs parameter to BGCRC_lockRegister().

Return

None

The code for this module is contained in driverlib/bgcrc.c, with driverlib/bgcrc.h containing the API declarations for use by applications.