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