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#ifndef PXE_H
#define PXE_H
#include "pxe_types.h"
#include "pxe_api.h"
#include "etherboot.h"
#include "tftp.h"
/* Union used for PXE API calls; we don't know the type of the
* structure until we interpret the opcode. Also, Status is available
* in the same location for any opcode, and it's convenient to have
* non-specific access to it.
*/
union u_PXENV_ANY {
/* Make it easy to read status for any operation */
PXENV_STATUS_t Status;
struct s_PXENV_UNLOAD_STACK unload_stack;
struct s_PXENV_GET_CACHED_INFO get_cached_info;
struct s_PXENV_TFTP_READ_FILE restart_tftp;
struct s_PXENV_START_UNDI start_undi;
struct s_PXENV_STOP_UNDI stop_undi;
struct s_PXENV_START_BASE start_base;
struct s_PXENV_STOP_BASE stop_base;
struct s_PXENV_TFTP_OPEN tftp_open;
struct s_PXENV_TFTP_CLOSE tftp_close;
struct s_PXENV_TFTP_READ tftp_read;
struct s_PXENV_TFTP_READ_FILE tftp_read_file;
struct s_PXENV_TFTP_GET_FSIZE tftp_get_fsize;
struct s_PXENV_UDP_OPEN udp_open;
struct s_PXENV_UDP_CLOSE udp_close;
struct s_PXENV_UDP_WRITE udp_write;
struct s_PXENV_UDP_READ udp_read;
struct s_PXENV_UNDI_STARTUP undi_startup;
struct s_PXENV_UNDI_CLEANUP undi_cleanup;
struct s_PXENV_UNDI_INITIALIZE undi_initialize;
struct s_PXENV_UNDI_RESET undi_reset_adapter;
struct s_PXENV_UNDI_SHUTDOWN undi_shutdown;
struct s_PXENV_UNDI_OPEN undi_open;
struct s_PXENV_UNDI_CLOSE undi_close;
struct s_PXENV_UNDI_TRANSMIT undi_transmit;
struct s_PXENV_UNDI_SET_MCAST_ADDRESS undi_set_mcast_address;
struct s_PXENV_UNDI_SET_STATION_ADDRESS undi_set_station_address;
struct s_PXENV_UNDI_SET_PACKET_FILTER undi_set_packet_filter;
struct s_PXENV_UNDI_GET_INFORMATION undi_get_information;
struct s_PXENV_UNDI_GET_STATISTICS undi_get_statistics;
struct s_PXENV_UNDI_CLEAR_STATISTICS undi_clear_statistics;
struct s_PXENV_UNDI_INITIATE_DIAGS undi_initiate_diags;
struct s_PXENV_UNDI_FORCE_INTERRUPT undi_force_interrupt;
struct s_PXENV_UNDI_GET_MCAST_ADDRESS undi_get_mcast_address;
struct s_PXENV_UNDI_GET_NIC_TYPE undi_get_nic_type;
struct s_PXENV_UNDI_GET_IFACE_INFO undi_get_iface_info;
struct s_PXENV_UNDI_GET_STATE undi_get_state;
struct s_PXENV_UNDI_ISR undi_isr;
};
typedef union u_PXENV_ANY PXENV_ANY_t;
/* PXE stack status indicator. See pxe_export.c for further
* explanation.
*/
typedef enum {
CAN_UNLOAD = 0,
MIDWAY,
READY
} pxe_stack_state_t;
#define ENSURE_CAN_UNLOAD(structure) if ( ! ensure_pxe_state(CAN_UNLOAD) ) { \
structure->Status = PXENV_STATUS_UNDI_INVALID_STATE; \
return PXENV_EXIT_FAILURE; }
#define ENSURE_MIDWAY(structure) if ( ! ensure_pxe_state(MIDWAY) ) { \
structure->Status = PXENV_STATUS_UNDI_INVALID_STATE; \
return PXENV_EXIT_FAILURE; }
#define ENSURE_READY(structure) if ( ! ensure_pxe_state(READY) ) { \
structure->Status = PXENV_STATUS_UNDI_INVALID_STATE; \
return PXENV_EXIT_FAILURE; }
/* Data structures installed as part of a PXE stack. Architectures
* will have extra information to append to the end of this.
*/
#define PXE_TFTP_MAGIC_COOKIE ( ( 'P'<<24 ) | ( 'x'<<16 ) | ( 'T'<<8 ) | 'f' )
typedef struct pxe_stack {
struct s_PXE pxe __attribute__ ((aligned(16)));
struct s_PXENV pxenv __attribute__ ((aligned(16)));
pxe_stack_state_t state;
union {
BOOTPLAYER_t cached_info;
char packet[ETH_FRAME_LEN];
struct {
uint32_t magic_cookie;
unsigned int len;
int eof;
char data[TFTP_MAX_BLKSIZE];
} tftpdata;
struct {
char *buffer;
uint32_t offset;
uint32_t bufferlen;
} readfile;
};
struct {} arch_data __attribute__ ((aligned(16)));
} pxe_stack_t;
extern int ensure_pxe_state ( pxe_stack_state_t wanted );
extern pxe_stack_t *pxe_stack;
extern PXENV_EXIT_t pxe_api_call ( int opcode, union u_PXENV_ANY *any );
#endif /* PXE_H */
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