82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
#ifndef _IPXE_VMWARE_H
|
|
#define _IPXE_VMWARE_H
|
|
|
|
/** @file
|
|
*
|
|
* VMware backdoor mechanism
|
|
*
|
|
*/
|
|
|
|
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
|
|
|
#include <stdint.h>
|
|
|
|
/** VMware backdoor I/O port */
|
|
#define VMW_PORT 0x5658
|
|
|
|
/** VMware backdoor magic value */
|
|
#define VMW_MAGIC 0x564d5868 /* "VMXh" */
|
|
|
|
/** VMware backdoor magic instruction */
|
|
#define VMW_BACKDOOR "inl %%dx, %%eax"
|
|
|
|
/** Get VMware version */
|
|
#define VMW_CMD_GET_VERSION 0x0a
|
|
|
|
/** Issue GuestRPC command */
|
|
#define VMW_CMD_GUESTRPC 0x1e
|
|
|
|
/**
|
|
* Get VMware version
|
|
*
|
|
* @ret version VMware version(?)
|
|
* @ret magic VMware magic number, if present
|
|
* @ret product_type VMware product type
|
|
*/
|
|
static inline __attribute__ (( always_inline )) void
|
|
vmware_cmd_get_version ( uint32_t *version, uint32_t *magic,
|
|
uint32_t *product_type ) {
|
|
uint32_t discard_d;
|
|
|
|
/* Perform backdoor call */
|
|
__asm__ __volatile__ ( VMW_BACKDOOR
|
|
: "=a" ( *version ), "=b" ( *magic ),
|
|
"=c" ( *product_type ), "=d" ( discard_d )
|
|
: "0" ( VMW_MAGIC ), "1" ( 0 ),
|
|
"2" ( VMW_CMD_GET_VERSION ),
|
|
"3" ( VMW_PORT ) );
|
|
}
|
|
|
|
/**
|
|
* Issue GuestRPC command
|
|
*
|
|
* @v channel Channel number
|
|
* @v subcommand GuestRPC subcommand
|
|
* @v parameter Subcommand-specific parameter
|
|
* @ret edxhi Subcommand-specific result
|
|
* @ret ebx Subcommand-specific result
|
|
* @ret status Command status
|
|
*/
|
|
static inline __attribute__ (( always_inline )) uint32_t
|
|
vmware_cmd_guestrpc ( int channel, uint16_t subcommand, uint32_t parameter,
|
|
uint16_t *edxhi, uint32_t *ebx ) {
|
|
uint32_t discard_a;
|
|
uint32_t status;
|
|
uint32_t edx;
|
|
|
|
/* Perform backdoor call */
|
|
__asm__ __volatile__ ( VMW_BACKDOOR
|
|
: "=a" ( discard_a ), "=b" ( *ebx ),
|
|
"=c" ( status ), "=d" ( edx )
|
|
: "0" ( VMW_MAGIC ), "1" ( parameter ),
|
|
"2" ( VMW_CMD_GUESTRPC | ( subcommand << 16 )),
|
|
"3" ( VMW_PORT | ( channel << 16 ) ) );
|
|
*edxhi = ( edx >> 16 );
|
|
|
|
return status;
|
|
}
|
|
|
|
extern int vmware_present ( void );
|
|
|
|
#endif /* _IPXE_VMWARE_H */
|