static void
flash_native_file_open(char *name)
{
int created = 0;
extern char *tmpnam(char *s);
extern int ftruncate(int fd, off_t length);
if (!name) {
name = tmpnam(NULL);
}
file = open(name, O_RDWR);
if (file < 0) {
file = open(name, O_RDWR | O_CREAT, 0660);
assert(file > 0);
created = 1;
if (ftruncate(file, native_flash_dev.hf_size) < 0) {
assert(0);
}
}
file_loc = mmap(0, native_flash_dev.hf_size,
PROT_READ | PROT_WRITE, MAP_SHARED, file, 0);
assert(file_loc != MAP_FAILED);
if (created) {
flash_native_erase(0, native_flash_dev.hf_size);
}
}
int
flash_erase(uint32_t address, uint32_t num_bytes)
{
const struct flash_area_desc *area;
uint32_t end;
int i;
flash_native_ensure_file_open();
end = address + num_bytes;
for (i = 0; i < FLASH_NUM_AREAS; i++) {
area = flash_area_descs + i;
if (area->fad_offset >= end) {
return 0;
}
if (address >= area->fad_offset &&
address < area->fad_offset + area->fad_length) {
flash_native_erase(area->fad_offset, area->fad_length);
}
}
return 0;
}
int
flash_erase_sector(uint32_t sector_address)
{
int next_sector_id;
int sector_id;
int area_id;
flash_native_ensure_file_open();
area_id = find_area(sector_address);
if (area_id == -1) {
return -1;
}
sector_id = flash_area_descs[area_id].fad_sector_id;
while (1) {
flash_native_erase(sector_address,
flash_area_descs[area_id].fad_length);
area_id++;
if (area_id >= FLASH_NUM_AREAS) {
break;
}
next_sector_id = flash_area_descs[area_id].fad_sector_id;
if (next_sector_id != sector_id) {
break;
}
sector_id = next_sector_id;
}
return 0;
}
static int
native_flash_erase_sector(uint32_t sector_address)
{
int area_id;
uint32_t len;
flash_native_ensure_file_open();
area_id = find_area(sector_address);
if (area_id == -1) {
return -1;
}
len = flash_sector_len(area_id);
flash_native_erase(sector_address, len);
return 0;
}
static void
flash_native_ensure_file_open(void)
{
int expected_sz;
int i;
if (file == NULL) {
expected_sz = 0;
for (i = 0; i < FLASH_NUM_AREAS; i++) {
expected_sz += flash_area_descs[i].fad_length;
}
file = tmpfile();
assert(file != NULL);
flash_native_erase(0, expected_sz);
}
}
