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/*
* Lowest level routines for all ColdFire processors. Based on the
* MCF523x examples from Freescale.
*
* Freescale explicitly grants the redistribution and modification
* of these source files. The complete licensing information is
* available in the file LICENSE_FREESCALE.TXT.
*
* Modifications Copyright (c) 2006 Christian Walter <wolti@sil.at>
*
* File: $Id: mcf5xxx.S,v 1.2 2006/09/24 22:50:22 wolti Exp $
*/
.global asm_set_ipl
.global _asm_set_ipl
.global mcf5xxx_wr_cacr
.global _mcf5xxx_wr_cacr
.global mcf5xxx_wr_acr0
.global _mcf5xxx_wr_acr0
.global mcf5xxx_wr_acr1
.global _mcf5xxx_wr_acr1
.global mcf5xxx_wr_acr2
.global _mcf5xxx_wr_acr2
.global mcf5xxx_wr_acr3
.global _mcf5xxx_wr_acr3
.global mcf5xxx_wr_other_sp
.global _mcf5xxx_wr_other_sp
.global mcf5xxx_wr_other_a7
.global _mcf5xxx_wr_other_a7
.global mcf5xxx_wr_vbr
.global _mcf5xxx_wr_vbr
.global mcf5xxx_wr_macsr
.global _mcf5xxx_wr_macsr
.global mcf5xxx_wr_mask
.global _mcf5xxx_wr_mask
.global mcf5xxx_wr_acc0
.global _mcf5xxx_wr_acc0
.global mcf5xxx_wr_accext01
.global _mcf5xxx_wr_accext01
.global mcf5xxx_wr_accext23
.global _mcf5xxx_wr_accext23
.global mcf5xxx_wr_acc1
.global _mcf5xxx_wr_acc1
.global mcf5xxx_wr_acc2
.global _mcf5xxx_wr_acc2
.global mcf5xxx_wr_acc3
.global _mcf5xxx_wr_acc3
.global mcf5xxx_wr_sr
.global _mcf5xxx_wr_sr
.global mcf5xxx_wr_rambar0
.global _mcf5xxx_wr_rambar0
.global mcf5xxx_wr_rambar1
.global _mcf5xxx_wr_rambar1
.global mcf5xxx_wr_mbar
.global _mcf5xxx_wr_mbar
.global mcf5xxx_wr_mbar0
.global _mcf5xxx_wr_mbar0
.global mcf5xxx_wr_mbar1
.global _mcf5xxx_wr_mbar1
.text
/********************************************************************/
/*
* This routines changes the IPL to the value passed into the routine.
* It also returns the old IPL value back.
* Calling convention from C:
* old_ipl = asm_set_ipl(new_ipl);
* For the Diab Data C compiler, it passes return value thru D0.
* Note that only the least significant three bits of the passed
* value are used.
*/
asm_set_ipl:
_asm_set_ipl:
link a6,#-8
movem.l d6-d7,(sp)
move.w sr,d7 /* current sr */
move.l d7,d0 /* prepare return value */
andi.l #0x0700,d0 /* mask out IPL */
lsr.l #8,d0 /* IPL */
move.l 8(a6),d6 /* get argument */
andi.l #0x07,d6 /* least significant three bits */
lsl.l #8,d6 /* move over to make mask */
andi.l #0x0000F8FF,d7 /* zero out current IPL */
or.l d6,d7 /* place new IPL in sr */
move.w d7,sr
movem.l (sp),d6-d7
lea 8(sp),sp
unlk a6
rts
/********************************************************************/
/*
* These routines write to the special purpose registers in the ColdFire
* core. Since these registers are write-only in the supervisor model,
* no corresponding read routines exist.
*/
mcf5xxx_wr_cacr:
_mcf5xxx_wr_cacr:
move.l 4(sp),d0
.long 0x4e7b0002 /* movec d0,cacr */
nop
rts
mcf5xxx_wr_acr0:
_mcf5xxx_wr_acr0:
move.l 4(sp),d0
.long 0x4e7b0004 /* movec d0,ACR0 */
nop
rts
mcf5xxx_wr_acr1:
_mcf5xxx_wr_acr1:
move.l 4(sp),d0
.long 0x4e7b0005 /* movec d0,ACR1 */
nop
rts
mcf5xxx_wr_acr2:
_mcf5xxx_wr_acr2:
move.l 4(sp),d0
.long 0x4e7b0006 /* movec d0,ACR2 */
nop
rts
mcf5xxx_wr_acr3:
_mcf5xxx_wr_acr3:
move.l 4(sp),d0
.long 0x4e7b0007 /* movec d0,ACR3 */
nop
rts
mcf5xxx_wr_other_sp:
_mcf5xxx_wr_other_sp:
mcf5xxx_wr_other_a7:
_mcf5xxx_wr_other_a7:
move.l 4(sp),d0
.long 0x4e7b0800 /* movec d0,OTHER_A7 */
nop
rts
mcf5xxx_wr_vbr:
_mcf5xxx_wr_vbr:
move.l 4(sp),d0
.long 0x4e7b0801 /* movec d0,VBR */
nop
rts
mcf5xxx_wr_macsr:
_mcf5xxx_wr_macsr:
move.l 4(sp),d0
.long 0x4e7b0804 /* movec d0,MACSR */
nop
rts
mcf5xxx_wr_mask:
_mcf5xxx_wr_mask:
move.l 4(sp),d0
.long 0x4e7b0805 /* movec d0,MASK */
nop
rts
mcf5xxx_wr_acc0:
_mcf5xxx_wr_acc0:
move.l 4(sp),d0
.long 0x4e7b0806 /* movec d0,ACC0 */
nop
rts
mcf5xxx_wr_accext01:
_mcf5xxx_wr_accext01:
move.l 4(sp),d0
.long 0x4e7b0807 /* movec d0,ACCEXT01 */
nop
rts
mcf5xxx_wr_accext23:
_mcf5xxx_wr_accext23:
move.l 4(sp),d0
.long 0x4e7b0808 /* movec d0,ACCEXT23 */
nop
rts
mcf5xxx_wr_acc1:
_mcf5xxx_wr_acc1:
move.l 4(sp),d0
.long 0x4e7b0809 /* movec d0,ACC1 */
nop
rts
mcf5xxx_wr_acc2:
_mcf5xxx_wr_acc2:
move.l 4(sp),d0
.long 0x4e7b080A /* movec d0,ACC2 */
nop
rts
mcf5xxx_wr_acc3:
_mcf5xxx_wr_acc3:
move.l 4(sp),d0
.long 0x4e7b080B /* movec d0,ACC3 */
nop
rts
mcf5xxx_wr_sr:
_mcf5xxx_wr_sr:
move.l 4(sp),d0
move.w d0,SR
rts
mcf5xxx_wr_rambar0:
_mcf5xxx_wr_rambar0:
move.l 4(sp),d0
.long 0x4e7b0C04 /* movec d0,RAMBAR0 */
nop
rts
mcf5xxx_wr_rambar1:
_mcf5xxx_wr_rambar1:
move.l 4(sp),d0
.long 0x4e7b0C05 /* movec d0,RAMBAR1 */
nop
rts
mcf5xxx_wr_mbar:
_mcf5xxx_wr_mbar:
mcf5xxx_wr_mbar0:
_mcf5xxx_wr_mbar0:
move.l 4(sp),d0
.long 0x4e7b0C0F /* movec d0,MBAR0 */
nop
rts
mcf5xxx_wr_mbar1:
_mcf5xxx_wr_mbar1:
move.l 4(sp),d0
.long 0x4e7b0C0E /* movec d0,MBAR1 */
nop
rts
.end
/********************************************************************/