| 1 | #ifndef _PXE_CALL_H |
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| 2 | #define _PXE_CALL_H |
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| 3 | |
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| 4 | /** @file |
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| 5 | * |
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| 6 | * PXE API entry point |
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| 7 | */ |
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| 8 | |
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| 9 | FILE_LICENCE ( GPL2_OR_LATER ); |
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| 10 | |
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| 11 | #include <pxe_api.h> |
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| 12 | #include <realmode.h> |
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| 13 | |
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| 14 | struct net_device; |
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| 15 | |
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| 16 | /** PXE load address segment */ |
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| 17 | #define PXE_LOAD_SEGMENT 0 |
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| 18 | |
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| 19 | /** PXE load address offset */ |
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| 20 | #define PXE_LOAD_OFFSET 0x7c00 |
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| 21 | |
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| 22 | /** PXE physical load address */ |
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| 23 | #define PXE_LOAD_PHYS ( ( PXE_LOAD_SEGMENT << 4 ) + PXE_LOAD_OFFSET ) |
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| 24 | |
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| 25 | /** !PXE structure */ |
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| 26 | extern struct s_PXE __text16 ( ppxe ); |
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| 27 | #define ppxe __use_text16 ( ppxe ) |
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| 28 | |
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| 29 | /** PXENV+ structure */ |
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| 30 | extern struct s_PXENV __text16 ( pxenv ); |
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| 31 | #define pxenv __use_text16 ( pxenv ) |
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| 32 | |
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| 33 | extern void pxe_activate ( struct net_device *netdev ); |
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| 34 | extern int pxe_deactivate ( void ); |
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| 35 | extern int pxe_start_nbp ( void ); |
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| 36 | extern __asmcall void pxe_api_call ( struct i386_all_regs *ix86 ); |
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| 37 | extern int _pxe_api_call_weak ( struct i386_all_regs *ix86 ) |
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| 38 | __attribute__ (( weak )); |
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| 39 | |
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| 40 | /** |
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| 41 | * Dispatch PXE API call weakly |
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| 42 | * |
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| 43 | * @v ix86 Registers for PXE call |
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| 44 | * @ret present Zero if the PXE stack is present, nonzero if not |
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| 45 | * |
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| 46 | * A successful return only indicates that the PXE stack was available |
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| 47 | * for dispatching the call; it says nothing about the success of |
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| 48 | * whatever the call asked for. |
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| 49 | */ |
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| 50 | static inline int pxe_api_call_weak ( struct i386_all_regs *ix86 ) |
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| 51 | { |
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| 52 | if ( _pxe_api_call_weak != NULL ) |
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| 53 | return _pxe_api_call_weak ( ix86 ); |
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| 54 | return -1; |
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| 55 | } |
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| 56 | |
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| 57 | #endif /* _PXE_CALL_H */ |
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