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mips32: add fastdata loader working area

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Add a working area that is preserved between calls to
mips_m4k_bulk_write_memory - this gives us a speed increase
of approx 3kb/sec during flash writes to the pic32mx.

This area is released during a resume/reset.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
This commit is contained in:
Spencer Oliver
2011-01-04 12:29:49 +00:00
parent dc1c5a7500
commit 0cd84000da
6 changed files with 29 additions and 11 deletions
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7
src/target/mips32_pracc.c
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@@ -985,7 +985,12 @@ int mips32_pracc_fastdata_xfer(struct mips_ejtag *ejtag_info, struct working_are
}
/* write program into RAM */
mips32_pracc_write_mem32(ejtag_info, source->address, ARRAY_SIZE(handler_code), handler_code);
if (write_t != ejtag_info->fast_access_save)
{
mips32_pracc_write_mem32(ejtag_info, source->address, ARRAY_SIZE(handler_code), handler_code);
/* save previous operation to speed to any consecutive read/writes */
ejtag_info->fast_access_save = write_t;
}
LOG_DEBUG("%s using 0x%.8" PRIx32 " for write handler", __func__, source->address);