URL https://opencores.org/ocsvn/neorv32/neorv32/trunk

Subversion Repositories neorv32

[/] [neorv32/] [trunk/] [sw/] [lib/] [source/] [neorv32_cpu.c] - Diff between revs 64 and 65

Rev 64	Rev 65
Line 352...	Line 352...
`}`	`}`

`uint32_t i = 0;`	`uint32_t i = 0;`

`// try setting R bit in all PMPCFG CSRs`	`// try setting R bit in all PMPCFG CSRs`
`const uint32_t tmp = 0x01010101;`	`const uint32_t mask = 0x01010101;`
`for (i=0; i<16; i++) {`	`for (i=0; i<16; i++) {`
`__neorv32_cpu_pmp_cfg_write(i, tmp);`	`__neorv32_cpu_pmp_cfg_write(i, mask);`
`}`	`}`

`// sum up all written ones (only available PMPCFG* CSRs/entries will return =! 0)`	`// sum up all written ones (only available PMPCFG* CSRs/entries will return =! 0)`
`union {`	`union {`
`uint32_t uint32;`	`uint32_t uint32;`
`uint8_t uint8[sizeof(uint32_t)/sizeof(uint8_t)];`	`uint8_t uint8[sizeof(uint32_t)/sizeof(uint8_t)];`
`} cnt;`	`} cnt;`

`cnt.uint32 = 0;`	`cnt.uint32 = 0;`
`for (i=0; i<16; i++) {`	`for (i=0; i<16; i++) {`
`cnt.uint32 += __neorv32_cpu_pmp_cfg_read(i);`	`cnt.uint32 += __neorv32_cpu_pmp_cfg_read(i) & mask;`
`}`	`}`

`// sum up bytes`	`// sum up bytes`
`uint32_t num_regions = 0;`	`uint32_t num_regions = 0;`
`num_regions += (uint32_t)cnt.uint8[0];`	`num_regions += (uint32_t)cnt.uint8[0];`