Speed up mips_m4k_write_memory()

Do not call mips32_cp0_read() if not needed.
This will speed up execution of mips_m4k_write_memory()
by near 2x, with parameter count = 1.

Change-Id: I7829a7802b6475bc6d4ac3f0632d8d239d1072da
Signed-off-by: Salvador <sarroyofdez@yahoo.es>
Reviewed-on: http://openocd.zylin.com/624
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>

diff --git a/src/target/mips32_pracc.c b/src/target/mips32_pracc.c
index d657b987a93b5e7531609b17023b63bfd6f6d548..abf12e02219ce76c5036d825482bedf565f4d661 100644 (file)
--- a/src/target/mips32_pracc.c
+++ b/src/target/mips32_pracc.c
@@ -829,6 +829,9 @@ int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int siz
        uint32_t conf = 0;
        int cached = 0;
 
+       if ((KSEGX(addr) == KSEG1) || ((addr >= 0xff200000) && (addr <= 0xff3fffff)))
+               return retval; /*Nothing to do*/
+
        mips32_cp0_read(ejtag_info, &conf, 16, 0);
 
        switch (KSEGX(addr)) {
@@ -838,9 +841,6 @@ int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int siz
                case KSEG0:
                        cached = (conf & MIPS32_CONFIG0_K0_MASK) >> MIPS32_CONFIG0_K0_SHIFT;
                        break;
-               case KSEG1:
-                       /* uncachable segment - nothing to do */
-                       break;
                case KSEG2:
                case KSEG3:
                        cached = (conf & MIPS32_CONFIG0_K23_MASK) >> MIPS32_CONFIG0_K23_SHIFT;