Emulate address wrap in CFI02 chips mapping (Jan Kiszka).
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4219 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/hw/pflash_cfi02.c b/hw/pflash_cfi02.c
index d4d5a9f..075f50f 100644
--- a/hw/pflash_cfi02.c
+++ b/hw/pflash_cfi02.c
@@ -55,7 +55,8 @@
BlockDriverState *bs;
target_phys_addr_t base;
uint32_t sector_len;
- uint32_t total_len;
+ uint32_t chip_len;
+ int mappings;
int width;
int wcycle; /* if 0, the flash is read normally */
int bypass;
@@ -72,6 +73,19 @@
void *storage;
};
+static void pflash_register_memory(pflash_t *pfl, int rom_mode)
+{
+ unsigned long phys_offset = pfl->fl_mem;
+ int i;
+
+ if (rom_mode)
+ phys_offset |= pfl->off | IO_MEM_ROMD;
+
+ for (i = 0; i < pfl->mappings; i++)
+ cpu_register_physical_memory(pfl->base + i * pfl->chip_len,
+ pfl->chip_len, phys_offset);
+}
+
static void pflash_timer (void *opaque)
{
pflash_t *pfl = opaque;
@@ -82,8 +96,7 @@
if (pfl->bypass) {
pfl->wcycle = 2;
} else {
- cpu_register_physical_memory(pfl->base, pfl->total_len,
- pfl->off | IO_MEM_ROMD | pfl->fl_mem);
+ pflash_register_memory(pfl, 1);
pfl->wcycle = 0;
}
pfl->cmd = 0;
@@ -98,6 +111,7 @@
DPRINTF("%s: offset " TARGET_FMT_lx "\n", __func__, offset);
ret = -1;
offset -= pfl->base;
+ offset &= pfl->chip_len - 1;
boff = offset & 0xFF;
if (pfl->width == 2)
boff = boff >> 1;
@@ -226,11 +240,10 @@
offset -= (uint32_t)(long)pfl->storage;
else
offset -= pfl->base;
+ offset &= pfl->chip_len - 1;
DPRINTF("%s: offset " TARGET_FMT_lx " %08x %d\n", __func__,
offset, value, width);
- /* Set the device in I/O access mode */
- cpu_register_physical_memory(pfl->base, pfl->total_len, pfl->fl_mem);
boff = offset & (pfl->sector_len - 1);
if (pfl->width == 2)
boff = boff >> 1;
@@ -238,6 +251,8 @@
boff = boff >> 2;
switch (pfl->wcycle) {
case 0:
+ /* Set the device in I/O access mode */
+ pflash_register_memory(pfl, 0);
/* We're in read mode */
check_unlock0:
if (boff == 0x55 && cmd == 0x98) {
@@ -369,9 +384,9 @@
}
/* Chip erase */
DPRINTF("%s: start chip erase\n", __func__);
- memset(pfl->storage, 0xFF, pfl->total_len);
+ memset(pfl->storage, 0xFF, pfl->chip_len);
pfl->status = 0x00;
- pflash_update(pfl, 0, pfl->total_len);
+ pflash_update(pfl, 0, pfl->chip_len);
/* Let's wait 5 seconds before chip erase is done */
qemu_mod_timer(pfl->timer,
qemu_get_clock(vm_clock) + (ticks_per_sec * 5));
@@ -424,8 +439,7 @@
/* Reset flash */
reset_flash:
- cpu_register_physical_memory(pfl->base, pfl->total_len,
- pfl->off | IO_MEM_ROMD | pfl->fl_mem);
+ pflash_register_memory(pfl, 1);
pfl->bypass = 0;
pfl->wcycle = 0;
pfl->cmd = 0;
@@ -527,15 +541,15 @@
pflash_t *pflash_cfi02_register(target_phys_addr_t base, ram_addr_t off,
BlockDriverState *bs, uint32_t sector_len,
- int nb_blocs, int width,
+ int nb_blocs, int nb_mappings, int width,
uint16_t id0, uint16_t id1,
uint16_t id2, uint16_t id3,
uint16_t unlock_addr0, uint16_t unlock_addr1)
{
pflash_t *pfl;
- int32_t total_len;
+ int32_t chip_len;
- total_len = sector_len * nb_blocs;
+ chip_len = sector_len * nb_blocs;
/* XXX: to be fixed */
#if 0
if (total_len != (8 * 1024 * 1024) && total_len != (16 * 1024 * 1024) &&
@@ -549,12 +563,14 @@
pfl->fl_mem = cpu_register_io_memory(0, pflash_read_ops, pflash_write_ops,
pfl);
pfl->off = off;
- cpu_register_physical_memory(base, total_len,
- off | pfl->fl_mem | IO_MEM_ROMD);
+ pfl->base = base;
+ pfl->chip_len = chip_len;
+ pfl->mappings = nb_mappings;
+ pflash_register_memory(pfl, 1);
pfl->bs = bs;
if (pfl->bs) {
/* read the initial flash content */
- bdrv_read(pfl->bs, 0, pfl->storage, total_len >> 9);
+ bdrv_read(pfl->bs, 0, pfl->storage, chip_len >> 9);
}
#if 0 /* XXX: there should be a bit to set up read-only,
* the same way the hardware does (with WP pin).
@@ -564,9 +580,7 @@
pfl->ro = 0;
#endif
pfl->timer = qemu_new_timer(vm_clock, pflash_timer, pfl);
- pfl->base = base;
pfl->sector_len = sector_len;
- pfl->total_len = total_len;
pfl->width = width;
pfl->wcycle = 0;
pfl->cmd = 0;
@@ -620,7 +634,7 @@
/* Max timeout for chip erase */
pfl->cfi_table[0x26] = 0x0D;
/* Device size */
- pfl->cfi_table[0x27] = ctz32(total_len) + 1;
+ pfl->cfi_table[0x27] = ctz32(chip_len) + 1;
/* Flash device interface (8 & 16 bits) */
pfl->cfi_table[0x28] = 0x02;
pfl->cfi_table[0x29] = 0x00;
