blob: 89bea700b628e771705e05c973641057b691e530 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
/* mmio.h - access to MMIO registers */
#ifndef MMIO_H
#define MMIO_H
#include <stdint.h>
// write to MMIO register
static inline void mmio_write(uint32_t reg, uint32_t data) {
uint32_t *ptr = (uint32_t*)reg;
asm volatile("str %[data], [%[reg]]"
: : [reg]"r"(ptr), [data]"r"(data));
}
// read from MMIO register
static inline uint32_t mmio_read(uint32_t reg) {
uint32_t *ptr = (uint32_t*)reg;
uint32_t data;
asm volatile("ldr %[data], [%[reg]]"
: [data]"=r"(data) : [reg]"r"(ptr));
return data;
}
#endif // #ifndef MMIO_H
|
