URL https://opencores.org/ocsvn/eco32/eco32/trunk

Subversion Repositories eco32

[/] [eco32/] [trunk/] [monitor/] [monitor/] [boards/] [xsa-xst-3/] [start.s] - Diff between revs 184 and 185

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Rev 184	Rev 185
Line 1...	Line 1...
`;`	`;`
`; start.s -- ECO32 ROM monitor startup and support routines`	`; start.s -- ECO32 ROM monitor startup and support routines`
`;`	`;`

	`; .set CIO_CTL,0x00 ; set console to keyboard/display`
	`.set CIO_CTL,0x03 ; set console to serial line 0`

`.set dmapaddr,0xC0000000 ; base of directly mapped addresses`	`.set dmapaddr,0xC0000000 ; base of directly mapped addresses`
`.set stacktop,0xC0010000 ; monitor stack is at top of 64K`	`.set stacktop,0xC0010000 ; monitor stack is at top of 64K`

`.set PSW,0 ; reg # of PSW`	`.set PSW,0 ; reg # of PSW`
`.set V_SHIFT,27 ; interrupt vector ctrl bit`	`.set V_SHIFT,27 ; interrupt vector ctrl bit`
Line 22...	Line 25...

`.import _ecode`	`.import _ecode`
`.import _edata`	`.import _edata`
`.import _ebss`	`.import _ebss`

`.import dspinit`
`.import dspoutchk`
`.import dspout`

`.import kbdinit`	`.import kbdinit`
`.import kbdinchk`	`.import kbdinchk`
`.import kbdin`	`.import kbdin`

	`.import dspinit`
	`.import dspoutchk`
	`.import dspout`

`.import ser0init`	`.import ser0init`
`.import ser0inchk`	`.import ser0inchk`
`.import ser0in`	`.import ser0in`
`.import ser0outchk`	`.import ser0outchk`
`.import ser0out`	`.import ser0out`
Line 56...	Line 59...

`.export _bcode`	`.export _bcode`
`.export _bdata`	`.export _bdata`
`.export _bbss`	`.export _bbss`

	`.export setcon`
`.export cinchk`	`.export cinchk`
`.export cin`	`.export cin`
`.export coutchk`	`.export coutchk`
`.export cout`	`.export cout`
`.export sinchk`
`.export sin`
`.export soutchk`
`.export sout`
`.export dskcap`	`.export dskcap`
`.export dskio`	`.export dskio`

`.export getTLB_HI`	`.export getTLB_HI`
`.export getTLB_LO`	`.export getTLB_LO`
Line 93...	Line 93...
`;***************************************************************`	`;***************************************************************`

`.code`	`.code`
`.align 4`	`.align 4`

`reset:`	`startup:`
`j start`	`j start`

`interrupt:`	`interrupt:`
`j isr`	`j isr`

Line 107...	Line 107...
`;***************************************************************`	`;***************************************************************`

`.code`	`.code`
`.align 4`	`.align 4`

	`setcon:`
	`j setcio`

`cinchk:`	`cinchk:`
`; j kbdinchk`	`j cichk`
`j ser0inchk`

`cin:`	`cin:`
`; j kbdin`	`j ci`
`j ser0in`

`coutchk:`	`coutchk:`
`; j dspoutchk`	`j cochk`
`j ser0outchk`

`cout:`	`cout:`
`; j dspout`	`j co`
`j ser0out`

`sinchk:`
`j ser0inchk`

`sin:`
`j ser0in`

`soutchk:`
`j ser0outchk`

`sout:`
`j ser0out`

`dskcap:`	`dskcap:`
`j dcap`	`j dcap`

`dskio:`	`dskio:`
`j dio`	`j dio`

`reserved1:`	`reserved10:`
`j reserved1`	`j reserved10`

	`reserved11:`
	`j reserved11`

`reserved2:`	`reserved12:`
`j reserved2`	`j reserved12`

`reserved3:`	`reserved13:`
`j reserved3`	`j reserved13`

	`reserved14:`
	`j reserved14`

	`reserved15:`
	`j reserved15`

`;***************************************************************`	`;***************************************************************`

`.code`	`.code`
`.align 4`	`.align 4`
Line 196...	Line 192...
`stw $0,$8,0 ; dst addr in $8`	`stw $0,$8,0 ; dst addr in $8`
`add $8,$8,4 ; upward`	`add $8,$8,4 ; upward`
`clrtest:`	`clrtest:`
`bltu $8,$9,clrloop`	`bltu $8,$9,clrloop`

`; now do some useful work`	`; initialize I/O`
`add $29,$0,stacktop ; setup monitor stack`	`add $29,$0,stacktop ; setup monitor stack`
`jal dspinit ; init display`
`jal kbdinit ; init keyboard`	`jal kbdinit ; init keyboard`
	`jal dspinit ; init display`
`jal ser0init ; init serial line 0`	`jal ser0init ; init serial line 0`
`jal ser1init ; init serial line 1`	`jal ser1init ; init serial line 1`
`jal dskinitctl ; init disk (controller)`	`jal dskinitctl ; init disk (controller)`
`jal dskinitser ; init disk (serial line)`	`jal dskinitser ; init disk (serial line)`
	`add $4,$0,CIO_CTL ; set console`
	`jal setcio`

	`; call main`
`jal main ; enter command loop`	`jal main ; enter command loop`

`; main should never return`	`; main should never return`
`j start ; just to be sure...`	`j start ; just to be sure...`

Line 238...	Line 238...
`tbwi`	`tbwi`
`jr $31`	`jr $31`

`;***************************************************************`	`;***************************************************************`

	`.data`
	`.align 4`

	`cioctl:`
	`.byte 0`

	`.code`
	`.align 4`

	`; void setcon(Byte ctl)`
	`setcio:`
	`stb $4,$0,cioctl`
	`j $31`

	`; int cinchk(void)`
	`cichk:`
	`ldbu $8,$0,cioctl`
	`and $8,$8,0x01`
	`bne $8,$0,cichk1`
	`j kbdinchk`
	`cichk1:`
	`j ser0inchk`

	`; char cin(void)`
	`ci:`
	`ldbu $8,$0,cioctl`
	`and $8,$8,0x01`
	`bne $8,$0,ci1`
	`j kbdin`
	`ci1:`
	`j ser0in`

	`; int coutchk(void)`
	`cochk:`
	`ldbu $8,$0,cioctl`
	`and $8,$8,0x02`
	`bne $8,$0,cochk1`
	`j dspoutchk`
	`cochk1:`
	`j ser0outchk`

	`; void cout(char c)`
	`co:`
	`ldbu $8,$0,cioctl`
	`and $8,$8,0x02`
	`bne $8,$0,co1`
	`j dspout`
	`co1:`
	`j ser0out`

	`;***************************************************************`

`.code`	`.code`
`.align 4`	`.align 4`

`; int dskcap(int dskno)`	`; int dskcap(int dskno)`
`dcap:`	`dcap:`

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[/] [eco32/] [trunk/] [monitor/] [monitor/] [boards/] [xsa-xst-3/] [start.s] - Diff between revs 184 and 185