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simplified MMU initialization

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removed (apparently unneeded) MMU TLBs
added source file templates for SPI dma routines
This commit is contained in:
Markus Fröschle
2013-07-28 07:19:57 +00:00
parent 0a874de24d
commit 55d0824ed3
13 changed files with 663 additions and 569 deletions
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47
BaS_gcc/sources/mmu.S
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@@ -71,9 +71,9 @@
#define std_mmutr (MCF_MMU_MMUTR_SG|MCF_MMU_MMUTR_V)
#define mmuord_d ( MCF_MMU_MMUOR_ACC|MCF_MMU_MMUOR_UAA)
#define mmuord_i (MCF_MMU_MMUOR_ITLB|MCF_MMU_MMUOR_ACC|MCF_MMU_MMUOR_UAA)
#define wt_mmudr (MCF_MMU_MMUDR_SZ(00)|MCF_MMU_MMUDR_CM(00)|MCF_MMU_MMUDR_R|MCF_MMU_MMUDR_W|MCF_MMU_MMUDR_X)
#define cb_mmudr (MCF_MMU_MMUDR_SZ(00)|MCF_MMU_MMUDR_CM(01)|MCF_MMU_MMUDR_R|MCF_MMU_MMUDR_W|MCF_MMU_MMUDR_X)
#define nc_mmudr (MCF_MMU_MMUDR_SZ(00)|MCF_MMU_MMUDR_CM(10)|MCF_MMU_MMUDR_R|MCF_MMU_MMUDR_W|MCF_MMU_MMUDR_X)
#define writethrough_mmudr (MCF_MMU_MMUDR_SZ(00)|MCF_MMU_MMUDR_CM(00)|MCF_MMU_MMUDR_R|MCF_MMU_MMUDR_W|MCF_MMU_MMUDR_X)
#define copyback_mmudr (MCF_MMU_MMUDR_SZ(00)|MCF_MMU_MMUDR_CM(01)|MCF_MMU_MMUDR_R|MCF_MMU_MMUDR_W|MCF_MMU_MMUDR_X)
#define nocache_precise_mmudr (MCF_MMU_MMUDR_SZ(00)|MCF_MMU_MMUDR_CM(10)|MCF_MMU_MMUDR_R|MCF_MMU_MMUDR_W|MCF_MMU_MMUDR_X)
.global _mmu_init
.global _mmutr_miss
@@ -112,66 +112,75 @@ _mmu_init:
move.l #MCF_MMU_MMUOR_CA,d0 // clear all entries,
move.l d0,MCF_MMU_MMUOR
nop
// 0000'0000 locked
moveq.l #0x00000000|std_mmutr,d0
moveq.l #0x00000000|cb_mmudr|MCF_MMU_MMUDR_LK,d1
moveq.l #mmuord_d,d2 // MMU update date
moveq.l #mmuord_i,d3 // MMU update instruction
moveq.l #0x00000000|copyback_mmudr|MCF_MMU_MMUDR_LK,d1
moveq.l #mmuord_d,d2 // MMU update data
moveq.l #mmuord_i,d3 // MMU update instruction
move.l d0,MCF_MMU_MMUTR
move.l d1,MCF_MMU_MMUDR
move.l d2,MCF_MMU_MMUOR // MMU update date
move.l d3,MCF_MMU_MMUOR // MMU update instruction
move.l d2,MCF_MMU_MMUOR // MMU update data
move.l d3,MCF_MMU_MMUOR // MMU update instruction
//---------------------------------------------------------------------------------------
// 00d0'0000 locked ID=6
// video ram: read write execute normal write true
move.l #0x00d00000|MCF_MMU_MMUTR_ID(sca_page_ID)|std_mmutr,d0
move.l #0x60d00000|wt_mmudr|MCF_MMU_MMUDR_LK,d1
move.l #0x60d00000|writethrough_mmudr|MCF_MMU_MMUDR_LK,d1
move.l d0,MCF_MMU_MMUTR
move.l d1,MCF_MMU_MMUDR
move.l d2,MCF_MMU_MMUOR // MMU update date
move.l d2,MCF_MMU_MMUOR // MMU update data
move.l #0x00d00000|std_mmutr,d0
move.l d3,MCF_MMU_MMUOR // MMU update instruction
move.l #0x2000,d0
move.l d0,_video_tlb // set page as video page
clr.l _video_sbt // clear time
#ifdef _NOT_USED_
//-------------------------------------------------------------------------------------
// Make the TOS (in SDRAM) read-only
move.l #__TOS+std_mmutr,d0
move.l #__TOS+cb_mmudr+MCF_MMU_MMUDR_LK,d1
move.l #__TOS+copyback_mmudr+MCF_MMU_MMUDR_LK,d1
move.l d0,MCF_MMU_MMUTR
move.l d1,MCF_MMU_MMUDR
move.l d2,MCF_MMU_MMUOR // setzen read only ?????? noch nicht
move.l d3,MCF_MMU_MMUOR // setzen
#endif /* _NOT_USED_ */
// 00f0'0000 locked
move.l #0x00f00000|std_mmutr,d0
move.l #0xfff00000|nc_mmudr|MCF_MMU_MMUDR_LK,d1
move.l #0xfff00000|nocache_precise_mmudr|MCF_MMU_MMUDR_LK,d1
move.l d0,MCF_MMU_MMUTR
move.l d1,MCF_MMU_MMUDR
move.l d2,MCF_MMU_MMUOR // maped to ffffxxx, precise,
move.l d3,MCF_MMU_MMUOR // maped to ffffxxx, precise,
move.l d2,MCF_MMU_MMUOR // mapped to ffffxxx, precise,
move.l d3,MCF_MMU_MMUOR // mapped to ffffxxx, precise,
// 1fe0'0000 locked
move.l #0x1FE00000|std_mmutr,d0
move.l #0x1FE00000|cb_mmudr|MCF_MMU_MMUDR_LK,d1
move.l #0x1FE00000|copyback_mmudr|MCF_MMU_MMUDR_LK,d1
move.l d0,MCF_MMU_MMUTR
move.l d1,MCF_MMU_MMUDR
move.l d2,MCF_MMU_MMUOR // setzen data
move.l d3,MCF_MMU_MMUOR // setzen instr
// 1ff0'0000 locked
#ifdef _NOT_USED_
// 1ff0'0000 locked (FIXME: why is this?)
move.l #0x1FF00000|std_mmutr,d0
move.l #0x1FF00000|cb_mmudr|MCF_MMU_MMUDR_LK,d1
move.l #0x1FF00000|copyback_mmudr|MCF_MMU_MMUDR_LK,d1
move.l d0,MCF_MMU_MMUTR
move.l d1,MCF_MMU_MMUDR
move.l d2,MCF_MMU_MMUOR // setzen data
move.l d3,MCF_MMU_MMUOR // setzen instr
// instr 0xFFF0'0000 nach 0x1FF0'0000 umleiten -->> short sprung
/* move.l #0xFFF00000|std_mmutr,d0
move.l #0x1FF00000|cb_mmudr|MCF_MMU_MMUDR_LK,d1
move.l #0x1FF00000|copyback_mmudr|MCF_MMU_MMUDR_LK,d1
move.l d0,MCF_MMU_MMUTR
move.l d1,MCF_MMU_MMUDR
move.l d3,MCF_MMU_MMUOR // setzen instr
*/
#endif /* _NOT_USED_ */
move.l (sp)+,d2 // Restore registers
move.l (sp)+,d3
rts
@@ -185,7 +194,7 @@ _mmutr_miss:
or.l #std_mmutr,d0
move.l d0,MCF_MMU_MMUTR
and.l #0xFFF00000,d0
or.l #cb_mmudr,d0
or.l #copyback_mmudr,d0
move.l d0,MCF_MMU_MMUDR
moveq.l #mmuord_d,d0 // MMU update data
move.l d0,MCF_MMU_MMUOR // set