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#ifndef _IPXE_SBI_H
#define _IPXE_SBI_H
/** @file
*
* Supervisor Binary Interface (SBI)
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <stdint.h>
/** An SBI function return value */
struct sbi_return {
/** Error status (returned in a0) */
long error;
/** Data value (returned in a1) */
long value;
};
/**
* @defgroup sbierrors SBI errors
*
* *{
*/
#define SBI_SUCCESS 0 /**< Completed successfully */
#define SBI_ERR_FAILED -1 /**< Failed */
#define SBI_ERR_NOT_SUPPORTED -2 /**< Not supported */
#define SBI_ERR_INVALID_PARAM -3 /**< Invalid parameter(s) */
#define SBI_ERR_DENIED -4 /**< Denied or not allowed */
#define SBI_ERR_INVALID_ADDRESS -5 /**< Invalid address(es) */
#define SBI_ERR_ALREADY_AVAILABLE -6 /**< Already available */
#define SBI_ERR_ALREADY_STARTED -7 /**< Already started */
#define SBI_ERR_ALREADY_STOPPED -8 /**< Already stopped */
#define SBI_ERR_NO_SHMEM -9 /**< Shared memory not available */
#define SBI_ERR_INVALID_STATE -10 /**< Invalid state */
#define SBI_ERR_BAD_RANGE -11 /**< Bad (or invalid) range */
#define SBI_ERR_TIMEOUT -12 /**< Failed due to timeout */
#define SBI_ERR_IO -13 /**< Input/output error */
/** @} */
/** Construct SBI extension ID */
#define SBI_EID( c1, c2, c3, c4 ) \
( (int) ( ( (c1) << 24 ) | ( (c2) << 16 ) | ( (c3) << 8 ) | (c4) ) )
/**
* Call supervisor with no parameters
*
* @v eid Extension ID
* @v fid Function ID
* @ret ret Return value
*/
static inline __attribute__ (( always_inline )) struct sbi_return
sbi_ecall_0 ( int eid, int fid ) {
register unsigned long a7 asm ( "a7" ) = ( ( long ) eid );
register unsigned long a6 asm ( "a6" ) = ( ( long ) fid );
register unsigned long a0 asm ( "a0" );
register unsigned long a1 asm ( "a1" );
struct sbi_return ret;
__asm__ __volatile__ ( "ecall"
: "=r" ( a0 ), "=r" ( a1 )
: "r" ( a6 ), "r" ( a7 )
: "memory" );
ret.error = a0;
ret.value = a1;
return ret;
}
/**
* Call supervisor with one parameter
*
* @v eid Extension ID
* @v fid Function ID
* @v param0 Parameter 0
* @ret ret Return value
*/
static inline __attribute__ (( always_inline )) struct sbi_return
sbi_ecall_1 ( int eid, int fid, unsigned long p0 ) {
register unsigned long a7 asm ( "a7" ) = ( ( long ) eid );
register unsigned long a6 asm ( "a6" ) = ( ( long ) fid );
register unsigned long a0 asm ( "a0" ) = p0;
register unsigned long a1 asm ( "a1" );
struct sbi_return ret;
__asm__ __volatile__ ( "ecall"
: "+r" ( a0 ), "=r" ( a1 )
: "r" ( a6 ), "r" ( a7 )
: "memory" );
ret.error = a0;
ret.value = a1;
return ret;
}
/**
* Call supervisor with two parameters
*
* @v eid Extension ID
* @v fid Function ID
* @v param0 Parameter 0
* @v param1 Parameter 1
* @ret ret Return value
*/
static inline __attribute__ (( always_inline )) struct sbi_return
sbi_ecall_2 ( int eid, int fid, unsigned long p0, unsigned long p1 ) {
register unsigned long a7 asm ( "a7" ) = ( ( long ) eid );
register unsigned long a6 asm ( "a6" ) = ( ( long ) fid );
register unsigned long a0 asm ( "a0" ) = p0;
register unsigned long a1 asm ( "a1" ) = p1;
struct sbi_return ret;
__asm__ __volatile__ ( "ecall"
: "+r" ( a0 ), "+r" ( a1 )
: "r" ( a6 ), "r" ( a7 )
: "memory" );
ret.error = a0;
ret.value = a1;
return ret;
}
/**
* Call supervisor with three parameters
*
* @v eid Extension ID
* @v fid Function ID
* @v param0 Parameter 0
* @v param1 Parameter 1
* @v param2 Parameter 2
* @ret ret Return value
*/
static inline __attribute__ (( always_inline )) struct sbi_return
sbi_ecall_3 ( int eid, int fid, unsigned long p0, unsigned long p1,
unsigned long p2 ) {
register unsigned long a7 asm ( "a7" ) = ( ( long ) eid );
register unsigned long a6 asm ( "a6" ) = ( ( long ) fid );
register unsigned long a0 asm ( "a0" ) = p0;
register unsigned long a1 asm ( "a1" ) = p1;
register unsigned long a2 asm ( "a2" ) = p2;
struct sbi_return ret;
__asm__ __volatile__ ( "ecall"
: "+r" ( a0 ), "+r" ( a1 )
: "r" ( a2 ), "r" ( a6 ), "r" ( a7 )
: "memory" );
ret.error = a0;
ret.value = a1;
return ret;
}
/** Convert an SBI error code to an iPXE status code */
#define ESBI( error ) EPLATFORM ( EINFO_EPLATFORM, error )
/** System reset extension */
#define SBI_SRST SBI_EID ( 'S', 'R', 'S', 'T' )
#define SBI_SRST_SYSTEM_RESET 0x00 /**< Reset system */
#define SBI_RESET_SHUTDOWN 0x00000000 /**< Shutdown */
#define SBI_RESET_COLD 0x00000001 /**< Cold reboot */
#define SBI_RESET_WARM 0x00000002 /**< Warm reboot */
/** Debug console extension */
#define SBI_DBCN SBI_EID ( 'D', 'B', 'C', 'N' )
#define SBI_DBCN_WRITE 0x00 /**< Console Write */
#define SBI_DBCN_READ 0x01 /**< Console Read */
#define SBI_DBCN_WRITE_BYTE 0x02 /**< Console Write Byte */
#endif /* _IPXE_SBI_H */
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