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

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [bootloaders/] [orpmon/] [cmds/] [cpu.c] - Diff between revs 175 and 246

Rev 175	Rev 246
Line 1...	Line 1...
`#include "common.h"`	`#include "common.h"`
`#include "support.h"`	`#include "support.h"`
`#include "spr_defs.h"`	`#include "spr-defs.h"`

`int ic_enable_cmd (int argc, char *argv[])`	`int ic_enable_cmd (int argc, char *argv[])`
`{`	`{`
`unsigned long addr;`	`unsigned long addr;`
`unsigned long sr;`	`unsigned long sr;`
Line 60...	Line 60...
`return 0;`	`return 0;`
`}`	`}`

`int dc_disable_cmd (int argc, char *argv[])`	`int dc_disable_cmd (int argc, char *argv[])`
`{`	`{`
`unsigned long sr;`

`if (argc) return -1;`	`if (argc) return -1;`

	`unsigned long sr = mfspr(SPR_SR);`

	`// If it's enabled and write back is on, we'd better flush it first`
	`// (CWS=1 is write back)`

	`unsigned long dccfgr = mfspr(SPR_DCCFGR);`
	`int i;`
	`int bs= (dccfgr & SPR_DCCFGR_CBS) ? 32 : 16;`
	`int ways = (1 << ((dccfgr & SPR_DCCFGR_NCS) >> 3));`
	`for(i=0;i<ways;i++)`
	`mtspr(SPR_DCBFR, i*bs);`

`/* Disable DC */`	`/* Disable DC */`
`asm("l.mfspr %0,r0,%1": "=r" (sr) : "i" (SPR_SR));`
`sr &= ~SPR_SR_DCE;`	`sr &= ~SPR_SR_DCE;`
`asm("l.mtspr r0,%0,%1": : "r" (sr), "i" (SPR_SR));`	`asm("l.mtspr r0,%0,%1": : "r" (sr), "i" (SPR_SR));`
`asm("l.nop");`	`asm("l.nop");`
`asm("l.nop");`	`asm("l.nop");`
`asm("l.nop");`	`asm("l.nop");`