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oehansens i2c and spi extensions

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This commit is contained in:
Markus Fröschle
2013-04-15 06:19:00 +00:00
parent e99525ceee
commit efd01c2fa3
81 changed files with 48740 additions and 0 deletions
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195
i2cspi_BaS_gcc/sources/mmu.S Normal file
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/*
* INIT ACR and MMU
*/
#include "startcf.h"
.extern _rt_vbr
.extern _rt_cacr
.extern _rt_asid
.extern _rt_acr0
.extern _rt_acr1
.extern _rt_acr2
.extern _rt_acr3
.extern _rt_mmubar
.extern ___MMUBAR
.extern cpusha
.extern _video_tlb
.extern _video_sbt
.extern __TOS
/* Register read/write macros */
#define MCF_MMU_MMUCR __MMUBAR
#define MCF_MMU_MMUOR __MMUBAR+0x04
#define MCF_MMU_MMUSR __MMUBAR+0x08
#define MCF_MMU_MMUAR __MMUBAR+0x10
#define MCF_MMU_MMUTR __MMUBAR+0x14
#define MCF_MMU_MMUDR __MMUBAR+0x18
/* Bit definitions and macros for MCF_MMU_MMUCR */
#define MCF_MMU_MMUCR_EN (0x1)
#define MCF_MMU_MMUCR_ASM (0x2)
/* Bit definitions and macros for MCF_MMU_MMUOR */
#define MCF_MMU_MMUOR_UAA (0x1)
#define MCF_MMU_MMUOR_ACC (0x2)
#define MCF_MMU_MMUOR_RW (0x4)
#define MCF_MMU_MMUOR_ADR (0x8)
#define MCF_MMU_MMUOR_ITLB (0x10)
#define MCF_MMU_MMUOR_CAS (0x20)
#define MCF_MMU_MMUOR_CNL (0x40)
#define MCF_MMU_MMUOR_CA (0x80)
#define MCF_MMU_MMUOR_STLB (0x100)
#define MCF_MMU_MMUOR_AA(x) (((x)&0xFFFF)<<0x10)
/* Bit definitions and macros for MCF_MMU_MMUSR */
#define MCF_MMU_MMUSR_HIT (0x2)
#define MCF_MMU_MMUSR_WF (0x8)
#define MCF_MMU_MMUSR_RF (0x10)
#define MCF_MMU_MMUSR_SPF (0x20)
/* Bit definitions and macros for MCF_MMU_MMUAR */
#define MCF_MMU_MMUAR_FA(x) (((x)&0xFFFFFFFF)<<0)
/* Bit definitions and macros for MCF_MMU_MMUTR */
#define MCF_MMU_MMUTR_V (0x1)
#define MCF_MMU_MMUTR_SG (0x2)
#define MCF_MMU_MMUTR_ID(x) (((x)&0xFF)<<0x2)
#define MCF_MMU_MMUTR_VA(x) (((x)&0x3FFFFF)<<0xA)
/* Bit definitions and macros for MCF_MMU_MMUDR */
#define MCF_MMU_MMUDR_LK (0x2)
#define MCF_MMU_MMUDR_X (0x4)
#define MCF_MMU_MMUDR_W (0x8)
#define MCF_MMU_MMUDR_R (0x10)
#define MCF_MMU_MMUDR_SP (0x20)
#define MCF_MMU_MMUDR_CM(x) (((x)&0x3)<<0x6)
#define MCF_MMU_MMUDR_SZ(x) (((x)&0x3)<<0x8)
#define MCF_MMU_MMUDR_PA(x) (((x)&0x3FFFFF)<<0xA)
#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)
.global _mmu_init
.global _mmutr_miss
.text
_mmu_init:
move.l d3,-(sp) // Backup registers
move.l d2,-(sp)
clr.l d0
movec d0,ASID // ASID allways 0
move.l d0,_rt_asid // sichern
move.l #0xC03FC040,d0 // data r/w precise c000'0000-ffff'ffff
movec d0,ACR0
move.l d0,_rt_acr0 // sichern
move.l #0x601FC000,d0 // data r/w wt 6000'0000-7fff'ffff
movec d0,ACR1
move.l d0,_rt_acr1 // sichern
move.l #0xe007C400,d0 // instruction r wt e000'0000-e07f'ffff
movec d0,ACR2
move.l d0,_rt_acr2 // sichern
clr.l d0 // acr3 aus
movec d0,ACR3
move.l d0,_rt_acr3 // sichern
move.l #__MMUBAR+1,d0
movec d0,MMUBAR //mmubar setzen
move.l d0,_rt_mmubar // sichern
nop
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
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
//---------------------------------------------------------------------------------------
// 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 d0,MCF_MMU_MMUTR
move.l d1,MCF_MMU_MMUDR
move.l d2,MCF_MMU_MMUOR // MMU update date
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
//-------------------------------------------------------------------------------------
// 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 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
// 00f0'0000 locked
move.l #0x00f00000|std_mmutr,d0
move.l #0xfff00000|nc_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,
// 1fe0'0000 locked
move.l #0x1FE00000|std_mmutr,d0
move.l #0x1FE00000|cb_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
move.l #0x1FF00000|std_mmutr,d0
move.l #0x1FF00000|cb_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 d0,MCF_MMU_MMUTR
move.l d1,MCF_MMU_MMUDR
move.l d3,MCF_MMU_MMUOR // setzen instr
*/
move.l (sp)+,d2 // Restore registers
move.l (sp)+,d3
rts
/*
* MMU table search
*/
_mmutr_miss:
bsr cpusha
and.l #0xFFF00000,d0
or.l #std_mmutr,d0
move.l d0,MCF_MMU_MMUTR
and.l #0xFFF00000,d0
or.l #cb_mmudr,d0
move.l d0,MCF_MMU_MMUDR
moveq.l #mmuord_d,d0 // MMU update data
move.l d0,MCF_MMU_MMUOR // setzen
moveq.l #mmuord_i,d0 // MMU update instruction
move.l d0,MCF_MMU_MMUOR // setzen
move.l (sp)+,d0
rte