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[PXEXT] Add FILE_API_CHECK API function

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Add FILE_API_CHECK to the PXEXT API so the NBP can query the
availability and status of the API.
This commit is contained in:
H. Peter Anvin 2008-03-26 15:10:56 -07:00
parent 83617e5b1c
commit d62e89d776
4 changed files with 67 additions and 0 deletions
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5
src/arch/i386/interface/pxe/pxe_call.c
View File

@ -97,6 +97,7 @@ union pxenv_call {
PXENV_EXIT_t ( * file_read ) ( struct s_PXENV_FILE_READ * );
PXENV_EXIT_t ( * get_file_size ) ( struct s_PXENV_GET_FILE_SIZE * );
PXENV_EXIT_t ( * file_exec ) ( struct s_PXENV_FILE_EXEC * );
PXENV_EXIT_t ( * file_api_check ) ( struct s_PXENV_FILE_API_CHECK * );
};
/**
@ -299,6 +300,10 @@ __cdecl void pxe_api_call ( struct i386_all_regs *ix86 ) {
pxenv_call.file_exec = pxenv_file_exec;
param_len = sizeof ( pxenv_any.file_exec );
break;
case PXENV_FILE_API_CHECK:
pxenv_call.file_api_check = pxenv_file_api_check;
param_len = sizeof ( pxenv_any.file_api_check );
break;
default:
DBG ( "PXENV_UNKNOWN_%hx", opcode );
pxenv_call.unknown = pxenv_unknown;

1
src/include/pxe.h
View File

@ -64,6 +64,7 @@ union u_PXENV_ANY {
struct s_PXENV_FILE_READ file_read;
struct s_PXENV_GET_FILE_SIZE get_file_size;
struct s_PXENV_FILE_EXEC file_exec;
struct s_PXENV_FILE_API_CHECK file_api_check;
};
typedef union u_PXENV_ANY PXENV_ANY_t;

26
src/include/pxe_api.h
View File

@ -1706,6 +1706,32 @@ extern PXENV_EXIT_t pxenv_file_exec ( struct s_PXENV_FILE_EXEC *file_exec );
/** @} */ /* pxenv_file_exec */
/** @defgroup pxenv_file_api_check PXENV_FILE_API_CHECK
*
* FILE API CHECK
*
* @{
*/
/** PXE API function code for pxenv_file_api_check() */
#define PXENV_FILE_API_CHECK 0x00e6
/** Parameter block for pxenv_file_api_check() */
struct s_PXENV_FILE_API_CHECK {
PXENV_STATUS_t Status; /**< PXE status code */
UINT16_t Size; /**< Size of structure */
UINT32_t Magic; /**< Magic number */
UINT32_t Provider; /**< Implementation identifier */
UINT32_t APIMask; /**< Supported API functions */
UINT32_t Flags; /**< Reserved for the future */
} PACKED;
typedef struct s_PXENV_FILE_API_CHECK PXENV_FILE_API_CHECK_t;
extern PXENV_EXIT_t pxenv_file_api_check ( struct s_PXENV_FILE_API_CHECK *file_api_check );
/** @} */ /* pxenv_file_api_check */
/** @} */ /* pxe_file_api */
/** @defgroup pxe_loader_api PXE Loader API

35
src/interface/pxe/pxe_file.c
View File

@ -227,3 +227,38 @@ PXENV_EXIT_t pxenv_file_exec ( struct s_PXENV_FILE_EXEC *file_exec ) {
file_exec->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/**
* FILE API CHECK
*
* @v file_exec Pointer to a struct s_PXENV_FILE_API_CHECK
* @v s_PXENV_FILE_API_CHECK::Magic Inbound magic number (0x91d447b2)
* @ret #PXENV_EXIT_SUCCESS Command was executed successfully
* @ret #PXENV_EXIT_FAILURE Command was not executed successfully
* @ret s_PXENV_FILE_API_CHECK::Status PXE status code
* @ret s_PXENV_FILE_API_CHECK::Magic Outbound magic number (0xe9c17b20)
* @ret s_PXENV_FILE_API_CHECK::Provider "gPXE" (0x45585067)
* @ret s_PXENV_FILE_API_CHECK::APIMask API function bitmask
* @ret s_PXENV_FILE_API_CHECK::Flags Reserved
*
*/
PXENV_EXIT_t pxenv_file_api_check ( struct s_PXENV_FILE_API_CHECK *file_api_check ) {
DBG ( "PXENV_FILE_API_CHECK" );
if ( file_api_check->Magic != 0x91d447b2 ) {
file_api_check->Status = PXENV_STATUS_BAD_FUNC;
return PXENV_EXIT_FAILURE;
} else if ( file_api_check->Size <
sizeof(struct s_PXENV_FILE_API_CHECK) ) {
file_api_check->Status = PXENV_STATUS_OUT_OF_RESOURCES;
return PXENV_EXIT_FAILURE;
} else {
file_api_check->Status = PXENV_STATUS_SUCCESS;
file_api_check->Size = sizeof(struct s_PXENV_FILE_API_CHECK);
file_api_check->Magic = 0xe9c17b20;
file_api_check->Provider = 0x45585067; /* "gPXE" */
file_api_check->APIMask = 0x0000007f; /* Functions e0-e6 */
file_api_check->Flags = 0; /* None defined */
return PXENV_EXIT_SUCCESS;
}
}