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

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [orpsocv2/] [sw/] [tests/] [or1200/] [sim/] [or1200-dctest.c] - Diff between revs 439 and 483

Show entire file | Details | Blame | View Log

Rev 439	Rev 483
Line 12...	Line 12...
`#include "spr-defs.h"`	`#include "spr-defs.h"`

`#define LOOPS 64`	`#define LOOPS 64`
`#define WORD_STRIDE 8`	`#define WORD_STRIDE 8`

`// Memory area to test at`	`extern unsigned long _stack;`
`#define TEST_BASE 0x600000 /* 6MB */`

`unsigned long int my_lfsr;`	`unsigned long int my_lfsr;`

`unsigned long int next_rand()`	`unsigned long int next_rand()`
`{`	`{`
Line 27...	Line 26...

`int`	`int`
`main()`	`main()`
`{`	`{`

	`unsigned long stack_top = (unsigned long) &_stack;`

`// Check data cache is present and enabled`	`// Check data cache is present and enabled`
`if (!(mfspr(SPR_UPR)& SPR_UPR_DCP) \| !(mfspr(SPR_SR) & SPR_SR_DCE))`	`if (!(mfspr(SPR_UPR)& SPR_UPR_DCP) \| !(mfspr(SPR_SR) & SPR_SR_DCE))`
`{`	`{`
`// Not really a pass, but not really a fail, either.`	`// Not really a pass, but not really a fail, either.`
`report(0x8000000d);`	`report(0x8000000d);`
`return 0;`	`return 0;`
`}`	`}`

`volatile char* ptr = (volatile char*) TEST_BASE;`	`volatile char* ptr = (volatile char*) (stack_top + 256);`
`int i;`	`int i;`

`ptr[0] = 0xab;`	`ptr[0] = 0xab;`

`ptr[4096] = 0xcd;`	`ptr[4096] = 0xcd;`
Line 97...	Line 98...
`// Now generate some random numbers, write them in in strides that should`	`// Now generate some random numbers, write them in in strides that should`
`// execercise the cache's line reloading/storing mechanism.`	`// execercise the cache's line reloading/storing mechanism.`

`// init LFSR`	`// init LFSR`
`my_lfsr = RAND_LFSR_SEED;`	`my_lfsr = RAND_LFSR_SEED;`
`volatile unsigned long int lptr = (volatile unsigned long int) TEST_BASE;`	`volatile unsigned long int lptr = (volatile unsigned long int) (stack_top + 256);`
`for(i=0;i<LOOPS;i++)`	`for(i=0;i<LOOPS;i++)`
`{`	`{`
`lptr[(i*WORD_STRIDE)-1] = next_rand();`	`lptr[(i*WORD_STRIDE)-1] = next_rand();`
`lptr[(i*WORD_STRIDE)+0] = next_rand();`	`lptr[(i*WORD_STRIDE)+0] = next_rand();`
`lptr[(i*WORD_STRIDE)+1] = next_rand();`	`lptr[(i*WORD_STRIDE)+1] = next_rand();`

Browse

Tools

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [orpsocv2/] [sw/] [tests/] [or1200/] [sim/] [or1200-dctest.c] - Diff between revs 439 and 483