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/* AHBSTAT driver interface
*
* COPYRIGHT (c) 2011.
* Cobham Gaisler AB.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifndef __AHBSTAT_H__
#define __AHBSTAT_H__
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
/* AHBSTAT Registers layout */
struct ahbstat_regs {
volatile uint32_t status;
volatile uint32_t failing;
};
/* AHB fail interrupt callback to user. This function is declared weak so that
* the user can define a function pointer variable containing the address
* responsible for handling errors
*
* minor Index of AHBSTAT hardware
* regs Register address of AHBSTAT
* status AHBSTAT status register at IRQ
* failing_address AHBSTAT Failing address register at IRQ
*
* * User return
* 0: print error onto terminal with printk and reenable AHBSTAT
* 1: just re-enable AHBSTAT
* 2: just print error
* 3: do nothing, let user do custom handling
*/
extern int (*ahbstat_error)(
int minor,
struct ahbstat_regs *regs,
uint32_t status,
uint32_t failing_address);
/* Get Last received AHB Error
*
* \param minor Index used to indentify a specific AHBSTAT core
* \param status Status register at time of error IRQ was recevied
* \param address Failing address register at time of error IRQ
*
* Return
* 0: No error received
* 1: Error Received, last status and address stored into argument pointers
* -1: No such AHBSTAT device
*/
extern int ahbstat_last_error(int minor, uint32_t *status, uint32_t *address);
/* Get AHBSTAT registers address from minor. Can also be used to check if
* AHBSTAT hardware is present.
*
* Return
* NULL returned if no such device
* non-zero Address to AHBSTAT register
*/
extern struct ahbstat_regs *ahbstat_get_regs(int minor);
/* Registers the AHBSTAT driver to the Driver Manager */
void ahbstat_register_drv (void);
#ifdef __cplusplus
}
#endif
#endif
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