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Refine I/O comments #354

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Feb 21, 2024
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Refine I/O comments #354

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12 changes: 8 additions & 4 deletions src/io.h
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Original file line number Diff line number Diff line change
Expand Up @@ -8,16 +8,15 @@
#include <stdint.h>
#include <string.h>

/* Directly map a memory with a size of 2^32 bytes. All memory read/write
* operations can access this memory through the memory subsystem.
*/

typedef struct {
uint8_t *mem_base;
uint64_t mem_size;
} memory_t;

/* create a memory instance */
memory_t *memory_new(uint32_t size);

/* delete a memory instance */
void memory_delete(memory_t *m);

/* read an instruction from memory */
Expand All @@ -35,6 +34,7 @@ uint8_t memory_read_b(uint32_t addr);
/* read a length of data from memory */
void memory_read(const memory_t *m, uint8_t *dst, uint32_t addr, uint32_t size);

/* write a length of data to memory */
static inline void memory_write(memory_t *m,
uint32_t addr,
const uint8_t *src,
Expand All @@ -43,12 +43,16 @@ static inline void memory_write(memory_t *m,
memcpy(m->mem_base + addr, src, size);
}

/* write a word to memory */
void memory_write_w(uint32_t addr, const uint8_t *src);

/* write a short to memory */
void memory_write_s(uint32_t addr, const uint8_t *src);

/* write a byte to memory */
void memory_write_b(uint32_t addr, const uint8_t *src);

/* write a length of certain value to memory */
static inline void memory_fill(memory_t *m,
uint32_t addr,
uint32_t size,
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