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mips: optimize CP0 read/write code

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MIPS32_PRACC_BASE_ADDR is defined as 0xFF200000. Now is
possible to load the base address with a lui instruction and
only one pracc access.
Offsets to the pracc code addresses are defined to simplify the code
and probably make it a bit more readable or self-explained.

Change-Id: I853dd2d7fad52745931cc6e6be68c0ae156d897e
Signed-off-by: Salvador Arroyo <sarroyofdez@yahoo.es>
Reviewed-on: http://openocd.zylin.com/951
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
Tested-by: jenkins
This commit is contained in:
Salvador Arroyo
2012-11-01 20:55:28 +01:00
committed by Spencer Oliver
parent 9aad563d15
commit 6644018337
2 changed files with 28 additions and 51 deletions
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7
src/target/mips32_pracc.h
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@@ -30,6 +30,7 @@
#include <target/mips_ejtag.h>
#define MIPS32_PRACC_FASTDATA_AREA 0xFF200000
#define MIPS32_PRACC_BASE_ADDR 0xFF200000
#define MIPS32_PRACC_FASTDATA_SIZE 16
#define MIPS32_PRACC_TEXT 0xFF200200
#define MIPS32_PRACC_STACK 0xFF204000
@@ -38,6 +39,12 @@
#define MIPS32_PRACC_PARAM_OUT (MIPS32_PRACC_PARAM_IN + MIPS32_PRACC_PARAM_IN_SIZE)
#define MIPS32_PRACC_PARAM_OUT_SIZE 0x1000
#define PRACC_UPPER_BASE_ADDR (MIPS32_PRACC_BASE_ADDR >> 16)
#define PRACC_TEXT_OFFSET (MIPS32_PRACC_TEXT - MIPS32_PRACC_BASE_ADDR)
#define PRACC_IN_OFFSET (MIPS32_PRACC_PARAM_IN - MIPS32_PRACC_BASE_ADDR)
#define PRACC_OUT_OFFSET (MIPS32_PRACC_PARAM_OUT - MIPS32_PRACC_BASE_ADDR)
#define PRACC_STACK_OFFSET (MIPS32_PRACC_STACK - MIPS32_PRACC_BASE_ADDR)
#define MIPS32_FASTDATA_HANDLER_SIZE 0x80
#define UPPER16(uint32_t) (uint32_t >> 16)
#define LOWER16(uint32_t) (uint32_t & 0xFFFF)