diff options
Diffstat (limited to 'hw/pflash_cfi02.c')
| -rw-r--r-- | hw/pflash_cfi02.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/hw/pflash_cfi02.c b/hw/pflash_cfi02.c index 075f50fba3..cb9b25093d 100644 --- a/hw/pflash_cfi02.c +++ b/hw/pflash_cfi02.c @@ -70,6 +70,7 @@ struct pflash_t { QEMUTimer *timer; ram_addr_t off; int fl_mem; + int rom_mode; void *storage; }; @@ -80,6 +81,7 @@ static void pflash_register_memory(pflash_t *pfl, int rom_mode) if (rom_mode) phys_offset |= pfl->off | IO_MEM_ROMD; + pfl->rom_mode = rom_mode; for (i = 0; i < pfl->mappings; i++) cpu_register_physical_memory(pfl->base + i * pfl->chip_len, @@ -110,7 +112,13 @@ static uint32_t pflash_read (pflash_t *pfl, uint32_t offset, int width) DPRINTF("%s: offset " TARGET_FMT_lx "\n", __func__, offset); ret = -1; - offset -= pfl->base; + if (pfl->rom_mode) { + offset -= (uint32_t)(long)pfl->storage; + /* Lazy reset of to ROMD mode */ + if (pfl->wcycle == 0) + pflash_register_memory(pfl, 1); + } else + offset -= pfl->base; offset &= pfl->chip_len - 1; boff = offset & 0xFF; if (pfl->width == 2) @@ -224,8 +232,6 @@ static void pflash_write (pflash_t *pfl, uint32_t offset, uint32_t value, uint8_t *p; uint8_t cmd; - /* WARNING: when the memory area is in ROMD mode, the offset is a - ram offset, not a physical address */ cmd = value; if (pfl->cmd != 0xA0 && cmd == 0xF0) { #if 0 @@ -236,7 +242,9 @@ static void pflash_write (pflash_t *pfl, uint32_t offset, uint32_t value, } DPRINTF("%s: offset " TARGET_FMT_lx " %08x %d %d\n", __func__, offset, value, width, pfl->wcycle); - if (pfl->wcycle == 0) + /* WARNING: when the memory area is in ROMD mode, the offset is a + ram offset, not a physical address */ + if (pfl->rom_mode) offset -= (uint32_t)(long)pfl->storage; else offset -= pfl->base; @@ -251,8 +259,9 @@ static void pflash_write (pflash_t *pfl, uint32_t offset, uint32_t value, boff = boff >> 2; switch (pfl->wcycle) { case 0: - /* Set the device in I/O access mode */ - pflash_register_memory(pfl, 0); + /* Set the device in I/O access mode if required */ + if (pfl->rom_mode) + pflash_register_memory(pfl, 0); /* We're in read mode */ check_unlock0: if (boff == 0x55 && cmd == 0x98) { @@ -439,7 +448,6 @@ static void pflash_write (pflash_t *pfl, uint32_t offset, uint32_t value, /* Reset flash */ reset_flash: - pflash_register_memory(pfl, 1); pfl->bypass = 0; pfl->wcycle = 0; pfl->cmd = 0; |