diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2014-06-19 18:06:25 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2014-06-19 18:06:25 +0100 |
| commit | a0289b8af3b05fe47bee8e434d1c978382a5a8cc (patch) | |
| tree | 9b2904efa9fee5697120cbb9c6078f502b9ff3f3 /hw/block/pflash_cfi01.c | |
| parent | 476e75ab9d2cf2ad8ac8dfd9530c9fee148c2c7a (diff) | |
hw/block/pflash_cfi01: Report correct size info for parallel configs
If the flash device is configured with a device-width which is
not equal to the bank-width, indicating that it is actually several
narrow flash devices in parallel, the CFI table should report the
number of blocks and the size of a single device, not of the whole
combined setup. This stops Linux from complaining:
"NOR chip too large to fit in mapping. Attempting to cope..."
As usual, we retain the old broken but backwards compatible behaviour
when the device-width is not specified.
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1402409025-25694-1-git-send-email-peter.maydell@linaro.org
Diffstat (limited to 'hw/block/pflash_cfi01.c')
| -rw-r--r-- | hw/block/pflash_cfi01.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c index 0c95d53dca..f9507b4e5a 100644 --- a/hw/block/pflash_cfi01.c +++ b/hw/block/pflash_cfi01.c @@ -748,9 +748,18 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp) pflash_t *pfl = CFI_PFLASH01(dev); uint64_t total_len; int ret; + uint64_t blocks_per_device, device_len; + int num_devices; total_len = pfl->sector_len * pfl->nb_blocs; + /* These are only used to expose the parameters of each device + * in the cfi_table[]. + */ + num_devices = pfl->device_width ? (pfl->bank_width / pfl->device_width) : 1; + blocks_per_device = pfl->nb_blocs / num_devices; + device_len = pfl->sector_len * blocks_per_device; + /* XXX: to be fixed */ #if 0 if (total_len != (8 * 1024 * 1024) && total_len != (16 * 1024 * 1024) && @@ -838,7 +847,7 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp) /* Max timeout for chip erase */ pfl->cfi_table[0x26] = 0x00; /* Device size */ - pfl->cfi_table[0x27] = ctz32(total_len); // + 1; + pfl->cfi_table[0x27] = ctz32(device_len); /* + 1; */ /* Flash device interface (8 & 16 bits) */ pfl->cfi_table[0x28] = 0x02; pfl->cfi_table[0x29] = 0x00; @@ -854,8 +863,8 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp) /* Number of erase block regions (uniform) */ pfl->cfi_table[0x2C] = 0x01; /* Erase block region 1 */ - pfl->cfi_table[0x2D] = pfl->nb_blocs - 1; - pfl->cfi_table[0x2E] = (pfl->nb_blocs - 1) >> 8; + pfl->cfi_table[0x2D] = blocks_per_device - 1; + pfl->cfi_table[0x2E] = (blocks_per_device - 1) >> 8; pfl->cfi_table[0x2F] = pfl->sector_len >> 8; pfl->cfi_table[0x30] = pfl->sector_len >> 16; @@ -882,6 +891,11 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp) static Property pflash_cfi01_properties[] = { DEFINE_PROP_DRIVE("drive", struct pflash_t, bs), + /* num-blocks is the number of blocks actually visible to the guest, + * ie the total size of the device divided by the sector length. + * If we're emulating flash devices wired in parallel the actual + * number of blocks per indvidual device will differ. + */ DEFINE_PROP_UINT32("num-blocks", struct pflash_t, nb_blocs, 0), DEFINE_PROP_UINT64("sector-length", struct pflash_t, sector_len, 0), /* width here is the overall width of this QEMU device in bytes. |