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pflash: Dont open memarea for full IO if already done.

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When wcycle is non zero the area is already opened for readable IO.
Avoiding the re-registration of the memarea significantly speeds up
the flash emulation. In particular for flashes connected through 8 or
16-bit buses.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@petalogix.com>
This commit is contained in:
Edgar E. Iglesias 2010-01-24 19:28:55 +01:00 committed by Edgar E. Iglesias
parent 4737fa266e
commit e9cbbcacb6
1 changed files with 4 additions and 2 deletions
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6
hw/pflash_cfi01.c
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@ -247,8 +247,10 @@ static void pflash_write(pflash_t *pfl, target_phys_addr_t offset,
DPRINTF("%s: writing offset " TARGET_FMT_plx " value %08x width %d wcycle 0x%x\n",
__func__, offset, value, width, pfl->wcycle);
/* Set the device in I/O access mode */
cpu_register_physical_memory(pfl->base, pfl->total_len, pfl->fl_mem);
if (!pfl->wcycle) {
/* Set the device in I/O access mode */
cpu_register_physical_memory(pfl->base, pfl->total_len, pfl->fl_mem);
}
switch (pfl->wcycle) {
case 0: