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#ifndef _PCILIB_REGISTER_H
#define _PCILIB_REGISTER_H
#include <uthash.h>
#include <pcilib.h>
#include <pcilib/bank.h>
#define PCILIB_REGISTER_NO_BITS 0
#define PCILIB_REGISTER_ALL_BITS ((pcilib_register_value_t)-1)
typedef enum {
PCILIB_REGISTER_R = 1, /**< reading from register is allowed */
PCILIB_REGISTER_W = 2, /**< normal writting to register is allowed */
PCILIB_REGISTER_RW = 3,
PCILIB_REGISTER_W1C = 4, /**< writting 1 resets the bit, writting 0 keeps the value */
PCILIB_REGISTER_RW1C = 5,
PCILIB_REGISTER_W1I = 8, /**< writting 1 inversts the bit, writting 0 keeps the value */
PCILIB_REGISTER_RW1I = 9,
} pcilib_register_mode_t;
typedef enum {
PCILIB_REGISTER_STANDARD = 0,
PCILIB_REGISTER_FIFO,
PCILIB_REGISTER_BITS
} pcilib_register_type_t;
typedef struct {
const char *name;
const char *view;
} pcilib_view_reference_t;
typedef struct {
pcilib_register_addr_t addr; /**< Register address in the bank */
pcilib_register_size_t offset; /**< Register offset in the byte (in bits) */
pcilib_register_size_t bits; /**< Register size in bits */
pcilib_register_value_t defvalue; /**< Default register value (some protocols, i.e. software registers, may set it during the initialization) */
pcilib_register_value_t rwmask; /**< Used to define how external bits of PCILIB_REGISTER_BITS registers are treated.
To keep bit value unchanged, we need to observe the following behavior depending on status of corresponding bit in this field:
1 - standard bit (i.e. if we want to keep the bit value we need to read it, and, the write back),
0 - non-standard bit which behavior is defined by mode (only partially implemented.
so far only 1C/1I modes (zero should be written to preserve the value) are supported */
pcilib_register_mode_t mode; /**< Register access (ro/wo/rw) and how writting to register works (if value just set as specified or, for instance, the bits which
are on in the value are cleared/inverted). For information only, no preprocessing on bits is performed. */
pcilib_register_type_t type; /**< Defines type of register is it standard register, subregister for bit fields or view, fifo */
pcilib_register_bank_addr_t bank; /**< Specified the address of the bank this register belongs to */
const char *name; /**< The access name of the register */
const char *description; /**< Brief description of the register */
pcilib_view_reference_t *views; /**< List of supported views for this register */
} pcilib_register_description_t;
typedef struct {
const char *name; /**< Register name */
pcilib_register_t reg; /**< Register index */
pcilib_register_bank_t bank; /**< Reference to bank containing the register */
pcilib_register_value_t min, max; /**< Minimum & maximum allowed values */
pcilib_xml_node_t *xml; /**< Additional XML properties */
pcilib_view_reference_t *views; /**< For non-static list of views, this vairables holds a copy of a NULL-terminated list from model (if present, memory should be de-allocated) */
UT_hash_handle hh;
} pcilib_register_context_t;
#ifdef __cplusplus
extern "C" {
#endif
/**
* Use this function to add new registers into the model. Currently, it is considered a error
* to re-add already defined register. If it will turn out to be useful to redefine some registers
* from the model, it may change in the future. However, we should think how to treat bit-registers
* in this case. The function will copy the context of registers structure, but name,
* description, and other strings in the structure are considered to have static duration
* and will not be copied. On error no new registers are initalized.
* @param[in,out] ctx - pcilib context
* @param[in] flags - not used now, but in future may instruct if existing registers should be reported as error (default), overriden or ignored
* @param[in] n - number of registers to initialize. It is OK to pass 0 if registers array is NULL terminated (last member of the array have all members set to 0)
* @param[in] registers - register descriptions
* @param[out] ids - if specified will contain the ids of the newly registered and overriden registers
* @return - error or 0 on success
*/
int pcilib_add_registers(pcilib_t *ctx, pcilib_model_modification_flags_t flags, size_t n, const pcilib_register_description_t *registers, pcilib_register_t *ids);
/**
* Destroys data associated with registers. This is an internal function and will
* be called during clean-up.
* @param[in,out] ctx - pcilib context
* @param[in] start - specifies first register to clean (used to clean only part of the registers to keep the defined state if pcilib_add_registers has failed)
*/
void pcilib_clean_registers(pcilib_t *ctx, pcilib_register_t start);
#ifdef __cplusplus
}
#endif
#endif /* _PCILIB_REGISTER_H */
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