#define DPRINTF(fmt, ...) do { } while (0)
#endif
+#define PFLASH_LAZY_ROMD_THRESHOLD 42
+
struct pflash_t {
BlockDriverState *bs;
target_phys_addr_t base;
ram_addr_t off;
int fl_mem;
int rom_mode;
+ int read_counter; /* used for lazy switch-back to rom mode */
void *storage;
};
DPRINTF("%s: offset " TARGET_FMT_plx "\n", __func__, offset);
ret = -1;
- if (!pfl->rom_mode) {
- /* Lazy reset of to ROMD mode */
- if (pfl->wcycle == 0)
- pflash_register_memory(pfl, 1);
+ /* Lazy reset to ROMD mode after a certain amount of read accesses */
+ if (!pfl->rom_mode && pfl->wcycle == 0 &&
+ ++pfl->read_counter > PFLASH_LAZY_ROMD_THRESHOLD) {
+ pflash_register_memory(pfl, 1);
}
offset &= pfl->chip_len - 1;
boff = offset & 0xFF;
/* Set the device in I/O access mode if required */
if (pfl->rom_mode)
pflash_register_memory(pfl, 0);
+ pfl->read_counter = 0;
/* We're in read mode */
check_unlock0:
if (boff == 0x55 && cmd == 0x98) {