mirror of
https://github.com/vivier/EMILE.git
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Split first.S to macos.i, floppy.u, scsi.i
This commit is contained in:
Laurent Vivier
parent
823a432af9
commit
ac1205b240
244
first/first.S
244
first/first.S
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@ -1,6 +1,6 @@
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/*
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*
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* (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
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* (c) 2004,2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
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*
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*/
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@ -9,86 +9,7 @@
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.equ sector_size, 512
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.equ first_level_size, 2 * sector_size
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.ifdef SCSI_SUPPORT
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/* SCSI constants */
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.equ _SCSIGet, 0x0001
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.equ _SCSISelect, 0x0002
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.equ _SCSICmd, 0x0003
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.equ _SCSIComplete, 0x0004
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.equ _SCSIRead, 0x0005
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.equ COMPLETION_TIMEOUT, 300
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/* SCSI macros */
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.macro SCSIDispatch selector
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move.w #\selector, -(%sp)
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dc.w 0xA815 /* _SCSIDispatch */
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move.w (%sp)+, %d0
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.endm
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.else /* SCSI_SUPPORT */
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/* floppy constants */
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.equ drive_num, 1
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.equ fsFromStart, 1
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.equ sectors_per_track, 18
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.equ sides, 2
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.equ track_size, sector_size * sectors_per_track
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.equ track_number, 80
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.equ floppy_size, sides * track_size * track_number
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.equ second_level_size, floppy_size - first_level_size
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/* floppy macros */
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.macro PBReadSync
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.short 0xA002
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.endm
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.endif /* SCSI_SUPPORT */
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.equ ROMBase, 0x2ae
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.equ SysZone, 0x2a6
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.equ TheZone, 0x2a6
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.macro SetApplBase
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.short 0xa057
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.endm
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.equ CPUFlag, 0x012F
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.macro StripAddress
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.short 0xA055
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.endm
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.macro ReadXPRam
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.short 0xA051
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.endm
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.macro WriteXPRam
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.short 0xA052
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.endm
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.macro NewPtr
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.short 0xA11E
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.endm
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.macro SysError
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.short 0xA9C9
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.endm
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/* Pascal string : length, string */
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.macro pString string
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pstring_begin_\@:
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.byte pstring_end_\@ - pstring_string_\@ - 1
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pstring_string_\@:
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.string "\string"
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pstring_end_\@:
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.fill 16 - (pstring_end_\@ - pstring_begin_\@) , 1, 0
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.endm
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.include "macos.i"
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/******************************************************************************
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*
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@ -116,67 +37,13 @@ SysHeapSize: .long 0x00020000 /* system heap size on all machines */
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.ifdef SCSI_SUPPORT
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.equ READ_10, 0x28
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.equ CDB_offset, 2
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.equ CDB_nb_blocks, 7
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.include "scsi.i"
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.align 4
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CDB:
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.byte READ_10
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.byte 0
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.long 0 /* offset to read, big-endian, like m68k */
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.byte 0
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.short 0 /* number of blocks to read, big-endian */
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.byte 0
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.else
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.equ op_inc, 1
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.equ op_no_inc, 2
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.equ op_stop, 7
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.include "floppy.i"
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.equ TIB_buffer, 2
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.equ TIB_size, 6
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.align 4
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TIB:
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.short op_inc
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.long 0
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.long 0
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.short op_stop
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.long 0
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.long 0
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/* SCSI complete result */
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stat: .short 0
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message: .short 0
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.else /* SCSI_SUPPORT */
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/******************************************************************************
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*
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* param block used to load second stage from floppy
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*
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*****************************************************************************/
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param_block:
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.long 0 /* qLink : next queue entry */
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.short 0 /* qType : queue type */
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.short 0 /* ioTrap : routine trap */
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.long 0 /* ioCmdAddr: routine address */
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.long 0 /* ioCompletion : pointer to completion routine */
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.short 0 /* ioResult : result code */
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.long 0 /* ioNamePtr : pointer to pathname */
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.short drive_num /* ioVRefNum : volume specification */
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.short -5 /* ioRefNum: file reference number */
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.byte 0 /* ioVersNum : version number */
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.byte 0 /* ioPermssn : read/write permission */
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.long 0 /* ioMisc : miscellaneaous */
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ioBuffer: /* ioBuffer : data buffer */
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.long 0
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ioReqCount: /* ioReqCount : requested number of bytes */
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.long second_level_size
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.long 0 /* ioActCount : actual number of bytes */
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.short fsFromStart /* ioPosMode : positioning mode and newline char */
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ioPosOffset: /* ioPosOffset : positionning offset */
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.long first_level_size
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.endif /* SCSI_SUPPORT */
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.endif
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/******************************************************************************
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*
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@ -239,17 +106,12 @@ start:
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bit32_ok:
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/* buffer size to store second stage booter */
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get_second_size %d0
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/* Allocate Memory for second stage loader */
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.ifdef SCSI_SUPPORT
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/* buffer size to store second level booter */
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move.l second_size(%pc), %d0
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.else
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lea ioReqCount(%pc),%a0
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move.l (%a0), %d0
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.endif
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add.l #4, %d0
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NewPtr
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move.l %a0, %d0
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@ -260,91 +122,9 @@ malloc_ok:
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add.l #3, %d0
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and.l #0xFFFFFFFC.l, %d0
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.ifdef SCSI_SUPPORT
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/* load second stage */
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lea container_end(%pc), %a6
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lea TIB(%pc), %a0 /* TIB */
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move.l %d0, TIB_buffer(%a0)
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lea PRAM_buffer(%pc), %a0
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move.l %d0, (%a0)
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scsi_loop:
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/* prepare CDB */
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lea CDB(%pc), %a0
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move.w -(%a6), %d2
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beq exit_scsi
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move.w %d2, CDB_nb_blocks(%a0)
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move.l -(%a6), CDB_offset(%a0)
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/* compute # of bytes to transfer = block size * # of blocks */
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move.w block_size(%pc), %d1
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mulu %d2, %d1
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/* prepare TIB */
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lea TIB(%pc), %a0 /* TIB */
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move.l %d1, TIB_size(%a0)
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/* SCSI sequence */
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/* SCSIGet */
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clr.w -(%sp)
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SCSIDispatch(_SCSIGet)
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/* SCSISelect */
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clr.w -(%sp)
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move.w #0, -(%sp)
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SCSIDispatch(_SCSISelect)
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/* SCSICmd */
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clr.w -(%sp)
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pea CDB(%pc)
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move.w #10, -(%sp)
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SCSIDispatch(_SCSICmd)
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/* SCSIRead */
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clr.w -(%sp)
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pea TIB(%pc)
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SCSIDispatch(_SCSIRead)
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/* SCSIComplete */
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clr.w -(%sp)
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pea stat(%pc)
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pea message(%pc)
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move.l #COMPLETION_TIMEOUT, -(%sp)
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SCSIDispatch(_SCSIComplete)
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bra scsi_loop
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exit_scsi:
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lea PRAM_buffer(%pc), %a0
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move.l (%a0), %a0
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.else
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/* save result in the ParamBlockRec.ioBuffer */
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lea ioBuffer(%pc),%a0
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move.l %d0,(%a0)
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/* Now, we load the second stage loader */
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lea param_block(%pc),%a0
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PBReadSync
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tst.l %d0
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beq read_ok
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move.l #2, %d0
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SysError
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read_ok:
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move.l ioBuffer(%pc),%a0
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.endif /* SCSI_SUPPORT */
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load_second
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/* call second stage bootloader */
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75
first/floppy.i
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75
first/floppy.i
Normal file
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@ -0,0 +1,75 @@
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/*
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*
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* (c) 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
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*
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*/
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/* floppy constants */
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.equ drive_num, 1
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.equ fsFromStart, 1
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.equ sectors_per_track, 18
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.equ sides, 2
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.equ track_size, sector_size * sectors_per_track
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.equ track_number, 80
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.equ floppy_size, sides * track_size * track_number
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.equ second_level_size, floppy_size - first_level_size
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/* floppy macros */
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.macro PBReadSync
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.short 0xA002
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.endm
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/******************************************************************************
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*
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* param block used to load second stage from floppy
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*
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*****************************************************************************/
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param_block:
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.long 0 /* qLink : next queue entry */
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.short 0 /* qType : queue type */
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.short 0 /* ioTrap : routine trap */
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.long 0 /* ioCmdAddr: routine address */
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.long 0 /* ioCompletion : pointer to completion routine */
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.short 0 /* ioResult : result code */
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.long 0 /* ioNamePtr : pointer to pathname */
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.short drive_num /* ioVRefNum : volume specification */
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.short -5 /* ioRefNum: file reference number */
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.byte 0 /* ioVersNum : version number */
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.byte 0 /* ioPermssn : read/write permission */
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.long 0 /* ioMisc : miscellaneaous */
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ioBuffer: /* ioBuffer : data buffer */
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.long 0
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ioReqCount: /* ioReqCount : requested number of bytes */
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.long second_level_size
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.long 0 /* ioActCount : actual number of bytes */
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.short fsFromStart /* ioPosMode : positioning mode and newline char */
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ioPosOffset: /* ioPosOffset : positionning offset */
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.long first_level_size
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.macro get_second_size register
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lea ioReqCount(%pc),%a0
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move.l (%a0), \register
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.endm
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.macro load_second
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/* save result in the ParamBlockRec.ioBuffer */
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lea ioBuffer(%pc),%a0
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move.l %d0,(%a0)
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/* Now, we load the second stage loader */
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lea param_block(%pc),%a0
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PBReadSync
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tst.l %d0
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beq read_ok
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move.l #2, %d0
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SysError
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read_ok:
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move.l ioBuffer(%pc),%a0
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.endm
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46
first/macos.i
Normal file
46
first/macos.i
Normal file
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@ -0,0 +1,46 @@
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/*
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*
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* (c) 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
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*
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*/
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.equ ROMBase, 0x2ae
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.equ SysZone, 0x2a6
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.equ TheZone, 0x2a6
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.macro SetApplBase
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.short 0xa057
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.endm
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.equ CPUFlag, 0x012F
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.macro StripAddress
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.short 0xA055
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.endm
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.macro ReadXPRam
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.short 0xA051
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.endm
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.macro WriteXPRam
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.short 0xA052
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.endm
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.macro NewPtr
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.short 0xA11E
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.endm
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.macro SysError
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.short 0xA9C9
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.endm
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/* Pascal string : length, string */
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.macro pString string
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pstring_begin_\@:
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.byte pstring_end_\@ - pstring_string_\@ - 1
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pstring_string_\@:
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.string "\string"
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pstring_end_\@:
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.fill 16 - (pstring_end_\@ - pstring_begin_\@) , 1, 0
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.endm
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129
first/scsi.i
Normal file
129
first/scsi.i
Normal file
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@ -0,0 +1,129 @@
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/*
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*
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* (c) 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
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*
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*/
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/* SCSI constants */
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.equ _SCSIGet, 0x0001
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.equ _SCSISelect, 0x0002
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.equ _SCSICmd, 0x0003
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.equ _SCSIComplete, 0x0004
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.equ _SCSIRead, 0x0005
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.equ COMPLETION_TIMEOUT, 300
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/* SCSI macros */
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.macro SCSIDispatch selector
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move.w #\selector, -(%sp)
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dc.w 0xA815 /* _SCSIDispatch */
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move.w (%sp)+, %d0
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.endm
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.macro get_second_size register
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/* buffer size to store second level booter */
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move.l second_size(%pc), \register
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.endm
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.macro load_second
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lea container_end(%pc), %a6
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lea TIB(%pc), %a0 /* TIB */
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move.l %d0, TIB_buffer(%a0)
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lea PRAM_buffer(%pc), %a0
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move.l %d0, (%a0)
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scsi_loop:
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/* prepare CDB */
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lea CDB(%pc), %a0
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move.w -(%a6), %d2
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beq exit_scsi
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move.w %d2, CDB_nb_blocks(%a0)
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move.l -(%a6), CDB_offset(%a0)
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/* compute # of bytes to transfer = block size * # of blocks */
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move.w block_size(%pc), %d1
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mulu %d2, %d1
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/* prepare TIB */
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lea TIB(%pc), %a0 /* TIB */
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move.l %d1, TIB_size(%a0)
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/* SCSI sequence */
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/* SCSIGet */
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clr.w -(%sp)
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SCSIDispatch(_SCSIGet)
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/* SCSISelect */
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clr.w -(%sp)
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move.w #0, -(%sp)
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SCSIDispatch(_SCSISelect)
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/* SCSICmd */
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clr.w -(%sp)
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pea CDB(%pc)
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move.w #10, -(%sp)
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SCSIDispatch(_SCSICmd)
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/* SCSIRead */
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clr.w -(%sp)
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pea TIB(%pc)
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SCSIDispatch(_SCSIRead)
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/* SCSIComplete */
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clr.w -(%sp)
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pea stat(%pc)
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pea message(%pc)
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move.l #COMPLETION_TIMEOUT, -(%sp)
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SCSIDispatch(_SCSIComplete)
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bra scsi_loop
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exit_scsi:
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lea PRAM_buffer(%pc), %a0
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move.l (%a0), %a0
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.endm
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.equ READ_10, 0x28
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.equ CDB_offset, 2
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.equ CDB_nb_blocks, 7
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.align 4
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CDB:
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.byte READ_10
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.byte 0
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.long 0 /* offset to read, big-endian, like m68k */
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.byte 0
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.short 0 /* number of blocks to read, big-endian */
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.byte 0
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.equ op_inc, 1
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.equ op_no_inc, 2
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.equ op_stop, 7
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.equ TIB_buffer, 2
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.equ TIB_size, 6
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.align 4
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TIB:
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.short op_inc
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.long 0
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.long 0
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.short op_stop
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.long 0
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.long 0
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/* SCSI complete result */
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stat: .short 0
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message: .short 0
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