stlink: add none 32bit memory read/write functions

This patch add none 32bit memory read/write  functions.

Change-Id: Ie3a761cf006249b30d0691d1ea167d69a012c36a
Signed-off-by: Mathias K <kesmtp@freenet.de>
Reviewed-on: http://openocd.zylin.com/367
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

diff --git a/src/target/stm32_stlink.c b/src/target/stm32_stlink.c
index fce9b7fb2e389acfaf52cc7147d6d15013feaa60..dec2b24bf1ac9a670aad91642cbb4759311cc297 100644 (file)
--- a/src/target/stm32_stlink.c
+++ b/src/target/stm32_stlink.c
@@ -560,31 +560,46 @@ static int stm32_stlink_read_memory(struct target *target, uint32_t address,
                                    uint8_t *buffer)
 {
        int res;
-       uint32_t *dst = (uint32_t *) buffer;
+       uint32_t buffer_threshold = 128;
+       uint32_t addr_increment = 4;
+       uint8_t *dst = buffer;
        uint32_t c;
        struct stlink_interface_s *stlink_if = target_to_stlink(target);
 
        if (!count || !buffer)
                return ERROR_COMMAND_SYNTAX_ERROR;
+
+       LOG_DEBUG("%s %x %d %d", __func__, address, size, count);
+
+       /* prepare byte count, buffer threshold
+        * and address increment for none 32bit access
+        */
        if (size != 4) {
-               LOG_DEBUG("%s %x %d %d", __func__, address, size, count);
-               return ERROR_COMMAND_SYNTAX_ERROR;
+               count *= size;
+               buffer_threshold = 64;
+               addr_increment = 1;
        }
 
        while (count) {
-               if (count > 128)
-                       c = 128;
+               if (count > buffer_threshold)
+                       c = buffer_threshold;
                else
                        c = count;
 
-               res =
-                   stlink_if->layout->api->read_mem32(stlink_if->fd, address,
+               if (size != 4)
+                       res =
+                               stlink_if->layout->api->read_mem8(stlink_if->fd, address,
                                                       c, dst);
+               else
+                       res =
+                               stlink_if->layout->api->read_mem32(stlink_if->fd, address,
+                                                      c, (uint32_t *)dst);
 
                if (res != ERROR_OK)
                        return res;
-               dst += c;
-               address += (c * 4);
+
+               address += (c * addr_increment);
+               dst += (c * addr_increment);
                count -= c;
        }
 
@@ -596,31 +611,46 @@ static int stm32_stlink_write_memory(struct target *target, uint32_t address,
                                     const uint8_t *buffer)
 {
        int res;
-       uint32_t *dst = (uint32_t *) buffer;
+       uint32_t buffer_threshold = 128;
+       uint32_t addr_increment = 4;
+       const uint8_t *dst = buffer;
        uint32_t c;
        struct stlink_interface_s *stlink_if = target_to_stlink(target);
 
        if (!count || !buffer)
                return ERROR_COMMAND_SYNTAX_ERROR;
+
+       LOG_DEBUG("%s %x %d %d", __func__, address, size, count);
+
+       /* prepare byte count, buffer threshold
+        * and address increment for none 32bit access
+        */
        if (size != 4) {
-               LOG_DEBUG("%s %x %d %d", __func__, address, size, count);
-               return ERROR_COMMAND_SYNTAX_ERROR;
+               count *= size;
+               buffer_threshold = 64;
+               addr_increment = 1;
        }
 
        while (count) {
-               if (count > 128)
-                       c = 128;
+               if (count > buffer_threshold)
+                       c = buffer_threshold;
                else
                        c = count;
 
-               res =
-                   stlink_if->layout->api->write_mem32(stlink_if->fd, address,
-                                                       c, dst);
+               if (size != 4)
+                       res =
+                               stlink_if->layout->api->write_mem8(stlink_if->fd, address,
+                                                      c, dst);
+               else
+                       res =
+                               stlink_if->layout->api->write_mem32(stlink_if->fd, address,
+                                                      c, (uint32_t *)dst);
 
                if (res != ERROR_OK)
                        return res;
-               dst += c;
-               address += (c * 4);
+
+               address += (c * addr_increment);
+               dst += (c * addr_increment);
                count -= c;
        }