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|
/*
* VME Linux/m68k Loader
*
* (c) Copyright 1998 by Nick Holgate
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING for more details.
*/
/*--------------------------------------------------------------------------*/
#define MVMEBugEntry 15 /* Trap #15 to call MVMEBug */
#define MB_OUTCHR 0x0020
#define MB_OUTSTR 0x0021
#define MB_WRITD 0x0028
#define MB_INCHR 0x0000
#define MB_INSTAT 0x0001
#define MB_DSKRD 0x0010
#define MB_SYMBOLTA 0x0130
#define MB_SYMBOLTD 0x0131
#define MB_RETURN 0x0063
#define MB_RTC_READ 0x0053
#define MB_NETRD 0x0018
#define MB_NETWR 0x0019
/*--------------------------------------------------------------------------*/
/* Board ID data structure
*
* Note, bytes 12 and 13 are board no in BCD (0162,0166,0167,0177,etc)
*/
typedef struct {
unsigned long bdid;
unsigned char rev;
unsigned char mth;
unsigned char day;
unsigned char yr;
unsigned short size;
unsigned short reserved;
unsigned short brdno;
unsigned char suffix[2];
unsigned long options;
unsigned short clun;
unsigned short dlun;
unsigned short ctype;
unsigned short dnum;
unsigned long option2;
} BRDID_PKT;
/*--------------------------------------------------------------------------*/
/* system call .NETRD/.NETWR packet template
*/
typedef struct niopcall {
unsigned char clun; /* controller logical unit number */
unsigned char dlun; /* device logical unit number */
unsigned short status; /* error status word */
unsigned long address; /* data transfer address */
unsigned long length; /* maximum length of transfer */
unsigned long offset; /* byte offset */
unsigned long time; /* transfer time in seconds (status) */
unsigned long bytes; /* transfer byte count (status) */
unsigned char filename[64]; /* boot filename buffer string */
} NIOPCALL;
/*--------------------------------------------------------------------------*/
/* network boot information block structure template
*/
typedef struct netbootinfo {
unsigned long cipa; /* client IP address */
unsigned long sipa; /* server IP address */
unsigned long gipa; /* gateway IP address */
unsigned long subnetmask; /* subnet IP address mask */
unsigned long broadcast; /* broadcast IP address */
} NETBOOTINFO;
/*--------------------------------------------------------------------------*/
/* Disk Read command block
*/
typedef struct {
unsigned char clun,
dlun;
unsigned short status;
unsigned long address,
block;
unsigned short count;
unsigned char flags,
mod;
} DSKRD_CMND;
/*--------------------------------------------------------------------------*/
/*
32 bit word at 0x14 block number of start of IPL
16 bit word at 0x18 number of blocks to load
32 bit word at 0x1E boot load address
32 bit word at 0x90 to contain 0 (Media config area start block)
Locations 0xF8 to 0xFF to contain "MOTOROLA"
*/
typedef struct {
unsigned long sp; /* 00 initial stack pointer */
unsigned long pc; /* 04 initial program counter */
char filler1[12]; /* 08 */
unsigned long boot_start_block; /* 14 boot file start block addr */
unsigned short boot_block_count; /* 18 number of blocks in file */
char filler2[4]; /* 1a */
unsigned long boot_load_addr; /* 1e */
char boot_code[110]; /* 22 IPL code */
unsigned long cfg_block; /* 90 config data start block */
unsigned char cfg_count; /* 94 config data block count */
char filler3[1]; /* 95 word align frag_list */
char frag_list[90]; /* 96 loader file fragment list */
char boot_id[16]; /* f0 id string "Linux68kMOTOROLA" */
} BOOTBLOCK;
#define BOOT_BLOCK_ID "Linux68kMOTOROLA"
/*--------------------------------------------------------------------------*/
/* Call MVMEBug putchar subroutine.
*/
static
__inline__
void
MVMEBug_putchar
( int c
)
{ register unsigned long d0 asm("d0") = (unsigned long) c;
asm volatile (
" move.b %%d0,-(%%sp)
trap #15
dc.w 0x0020
"
: /* no outputs */
: "r" (d0)
: "d0"
);
}
/*--------------------------------------------------------------------------*/
/* Call MVMEBug putstr subroutine.
*/
static
__inline__
void
MVMEBug_putstr
( const char *str,
const char *end
)
{ register void *a0 asm("a0") = (void *) str;
register void *a1 asm("a1") = (void *) end;
asm volatile (
" move.l %%a1,-(%%sp)
move.l %%a0,-(%%sp)
trap #15
dc.w 0x0021
"
: /* no outputs */
: "r" (a0), "r" (a1)
: "a0", "a1"
);
}
/*--------------------------------------------------------------------------*/
/* Call MVMEBug print subroutine.
*/
static
__inline__
void
MVMEBug_print
( const char *str,
void *vap
)
{ register void *a0 asm("a0") = (void *) str;
register void *a1 asm("a1") = (void *) vap;
asm volatile (
" move.l %%a1,-(%%sp)
move.l %%a0,-(%%sp)
trap #15
dc.w 0x0028
"
: /* no outputs */
: "r" (a0), "r" (a1)
: "a0", "a1"
);
}
/*--------------------------------------------------------------------------*/
/* Call MVMEBug getchar subroutine.
*/
static
__inline__
int
MVMEBug_getchar
( void
)
{ register unsigned long d0 asm("d0") = 0;
asm volatile (
" subq.l #2,%%sp
trap #15
dc.w 0x0000
move.b (%%sp)+,%%d0
"
: "=r" (d0)
: "r" (d0)
: "d0"
);
return d0;
}
/*--------------------------------------------------------------------------*/
/* Call MVMEBug input status subroutine.
*/
static
__inline__
int
MVMEBug_getchar_status
( void
)
{ register unsigned long d0 asm("d0");
asm volatile (
" move.l #0,-(%%sp)
trap #15
dc.w 0x0001
beq.s 1f
move.l #1,(%%sp)
1:
move.l (%%sp)+,%%d0
"
: "=r" (d0)
: /* no inputs */
: "d0"
);
return d0;
}
/*--------------------------------------------------------------------------*/
/* Call MVMEBug RTC read subroutine.
*/
static
__inline__
void
MVMEBug_rtc_read
( void *buf
)
{ register void * d0 asm("d0") = (void *) buf;
asm volatile (
" move.l %%d0,-(%%sp)
trap #15
dc.w 0x0053
"
: /* no outputs */
: "r" (d0)
: "d0"
);
}
/*--------------------------------------------------------------------------*/
/* Call MVMEBug disk_read subroutine.
*/
static
__inline__
void
MVMEBug_disk_read
( DSKRD_CMND *cmnd
)
{ register void *d0 asm("d0") = (void *) cmnd;
asm volatile (
" move.l %%d0,-(%%sp)
trap #15
dc.w 0x0010
"
: /* no outputs */
: "r" (d0)
: "d0", "memory"
);
}
/*--------------------------------------------------------------------------*/
/* Call MVMEBug net_read subroutine.
*/
static
__inline__
void
MVMEBug_net_read
( NIOPCALL *niop
)
{ register void *d0 asm("d0") = (void *) niop;
asm volatile (
" move.l %%d0,-(%%sp)
trap #15
dc.w 0x0018
"
: /* no outputs */
: "r" (d0)
: "d0", "memory"
);
}
/*--------------------------------------------------------------------------*/
/* Call MVMEBug.
*/
static
__inline__
void
MVMEBug_enter
( void
)
{
asm volatile (
" trap #15
dc.w 0x0063
"
: /* No outputs */
: /* No inputs */
: "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",
"a0", "a1", "a2", "a3", "a4", "a5", "a6", "memory"
);
}
/*--------------------------------------------------------------------------*/
/* Call MVMEBug BRD_ID subroutine.
*/
static
__inline__
BRDID_PKT *
MVMEBug_brdid
( void
)
{ register void * d0 asm("d0");
asm volatile (
" subq.l #4,%%sp
trap #15
dc.w 0x0070
move.l (%%sp)+,%%d0
"
: "=r" (d0)
: /* no inputs */
: "d0"
);
return d0;
}
/*-----------------------------< end of file >------------------------------*/
|
