- added patch to access cp15 register (XScale)

(thanks to Edgar Grimberg for the patch)

git-svn-id: svn://svn.berlios.de/openocd/trunk@283 b42882b7-edfa-0310-969c-e2dbd0fdcd60

diff --git a/src/target/xscale.c b/src/target/xscale.c
index 37f9b641e1617b4f1332a5e2abd1165887bd0ec0..ec49a8c6b311fbc2f59c28167f4b722c8b062ade 100644 (file)
--- a/src/target/xscale.c
+++ b/src/target/xscale.c
@@ -3579,6 +3579,96 @@ int xscale_handle_analyze_trace_buffer_command(struct command_context_s *cmd_ctx
        return ERROR_OK;
 }
 
+int xscale_handle_cp15(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
+{
+       target_t *target = get_current_target(cmd_ctx);
+       armv4_5_common_t *armv4_5;
+       xscale_common_t *xscale;
+       
+       if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+       {
+               command_print(cmd_ctx, "target isn't an XScale target");
+               return ERROR_OK;
+       }
+       
+       if (target->state != TARGET_HALTED)
+       {
+               command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
+               return ERROR_OK;
+       }
+       u32 reg_no = 0;
+       reg_t *reg = NULL;
+       if(argc > 0)
+       {
+               reg_no = strtoul(args[0], NULL, 0);
+               /*translate from xscale cp15 register no to openocd register*/
+               switch(reg_no)
+               {
+               case 0:
+                       reg_no = XSCALE_MAINID;
+                       break;
+               case 1:
+                       reg_no = XSCALE_CTRL;
+                       break;
+               case 2:
+                       reg_no = XSCALE_TTB;
+                       break; 
+               case 3:
+                       reg_no = XSCALE_DAC;
+                       break;
+               case 5:
+                       reg_no = XSCALE_FSR;
+                       break;
+               case 6:
+                       reg_no = XSCALE_FAR;
+                       break;
+               case 13:
+                       reg_no = XSCALE_PID;
+                       break;
+               case 15:
+                       reg_no = XSCALE_CPACCESS;
+                       break;
+               default:
+                       command_print(cmd_ctx, "invalid register number");
+                       return ERROR_INVALID_ARGUMENTS;
+               }
+               reg = &xscale->reg_cache->reg_list[reg_no];
+               
+       }
+       if(argc == 1)
+       {
+               u32 value;
+               
+               /* read cp15 control register */
+               xscale_get_reg(reg);
+               value = buf_get_u32(reg->value, 0, 32);
+               command_print(cmd_ctx, "%s (/%i): 0x%x", reg->name, reg->size, value);
+       }
+       else if(argc == 2)
+       {   
+
+               u32 value = strtoul(args[1], NULL, 0);
+               
+               /* send CP write request (command 0x41) */
+               xscale_send_u32(target, 0x41);
+               
+               /* send CP register number */
+               xscale_send_u32(target, reg_no);
+               
+               /* send CP register value */
+               xscale_send_u32(target, value);
+               
+               /* execute cpwait to ensure outstanding operations complete */
+               xscale_send_u32(target, 0x53);
+       }
+       else
+       {
+               command_print(cmd_ctx, "usage: cp15 [register]<, [value]>");    
+       }
+       
+       return ERROR_OK;
+}
+
 int xscale_register_commands(struct command_context_s *cmd_ctx)
 {
        command_t *xscale_cmd;
@@ -3603,6 +3693,8 @@ int xscale_register_commands(struct command_context_s *cmd_ctx)
        register_command(cmd_ctx, xscale_cmd, "trace_image", xscale_handle_trace_image_command,
                COMMAND_EXEC, "load image from <file> [base address]");
 
+       register_command(cmd_ctx, xscale_cmd, "cp15", xscale_handle_cp15, COMMAND_EXEC, "access coproc 15 <register> [value]");
+       
        armv4_5_register_commands(cmd_ctx);
 
        return ERROR_OK;