Increase write buffer size in pflash emulation (Thomas Petazzoni).

The current flash emulation code advertises a write buffer size of 16 bytes (1 << 4, according to offset 0x2A of the CFI table). This is very small compared to normal write buffer sizes, and makes the process of writing to the flash very slow (at least from U-Boot). This patch increases this size to 2048 bytes. Except the modification of the CFI table, the only other required modification is to use "value" instead of "cmd" to set pfl->counter, because cmd is truncated to the 8 lower bits of value, while the number of bytes for a write can now be greater than 255 bytes. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5454 c046a42c-6fe2-441c-8c8c-71466251a162

Increase write buffer size in pflash emulation (Thomas Petazzoni).
The current flash emulation code advertises a write buffer size of 16 bytes (1 << 4, according to offset 0x2A of the CFI table). This is very small compared to normal write buffer sizes, and makes the process of writing to the flash very slow (at least from U-Boot). This patch increases this size to 2048 bytes. Except the modification of the CFI table, the only other required modification is to use "value" instead of "cmd" to set pfl->counter, because cmd is truncated to the 8 lower bits of value, while the number of bytes for a write can now be greater than 255 bytes. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5454 c046a42c-6fe2-441c-8c8c-71466251a162
balrog
1 parent 998a0501
Showing 1 changed file with 3 additions and 3 deletions
hw/pflash_cfi01.c
@@ -276,8 +276,8 @@ static void pflash_write (pflash_t *pfl, target_ulong offset, uint32_t value,
             break;
         case 0xe8:
-            DPRINTF("%s: block write of %x bytes\n", __func__, cmd);
-            pfl->counter = cmd;
+            DPRINTF("%s: block write of %x bytes\n", __func__, value);
+            pfl->counter = value;
             pfl->wcycle++;
             break;
         case 0x60:
@@ -583,7 +583,7 @@ pflash_t *pflash_cfi01_register(target_phys_addr_t base, ram_addr_t off,
     pfl->cfi_table[0x28] = 0x02;
     pfl->cfi_table[0x29] = 0x00;
     /* Max number of bytes in multi-bytes write */
-    pfl->cfi_table[0x2A] = 0x04;
+    pfl->cfi_table[0x2A] = 0x0B;
     pfl->cfi_table[0x2B] = 0x00;
     /* Number of erase block regions (uniform) */
     pfl->cfi_table[0x2C] = 0x01;