semihosting: support fileio operation

[openocd.git] / src / target / armv4_5.c

diff --git a/src/target/armv4_5.c b/src/target/armv4_5.c
index e6ecfc88467d73044e83cd4bf37c25cff3b02478..624a2543db49909dfcc096e91f539d2d00c19fb9 100644 (file)
--- a/src/target/armv4_5.c
+++ b/src/target/armv4_5.c
@@ -666,14 +666,19 @@ int arm_arch_state(struct target *target)
                return ERROR_FAIL;
        }
 
+       /* avoid filling log waiting for fileio reply */
+       if (arm->semihosting_hit_fileio)
+               return ERROR_OK;
+
        LOG_USER("target halted in %s state due to %s, current mode: %s\n"
-               "cpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "%s",
+               "cpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "%s%s",
                arm_state_strings[arm->core_state],
                debug_reason_name(target),
                arm_mode_name(arm->core_mode),
                buf_get_u32(arm->cpsr->value, 0, 32),
                buf_get_u32(arm->pc->value, 0, 32),
-               arm->is_semihosting ? ", semihosting" : "");
+               arm->is_semihosting ? ", semihosting" : "",
+               arm->is_semihosting_fileio ? " fileio" : "");
 
        return ERROR_OK;
 }
@@ -1055,6 +1060,37 @@ COMMAND_HANDLER(handle_arm_semihosting_command)
        return ERROR_OK;
 }
 
+COMMAND_HANDLER(handle_arm_semihosting_fileio_command)
+{
+       struct target *target = get_current_target(CMD_CTX);
+
+       if (target == NULL) {
+               LOG_ERROR("No target selected");
+               return ERROR_FAIL;
+       }
+
+       struct arm *arm = target_to_arm(target);
+
+       if (!is_arm(arm)) {
+               command_print(CMD_CTX, "current target isn't an ARM");
+               return ERROR_FAIL;
+       }
+
+       if (!arm->is_semihosting) {
+               command_print(CMD_CTX, "semihosting is not enabled");
+               return ERROR_FAIL;
+       }
+
+       if (CMD_ARGC > 0)
+               COMMAND_PARSE_ENABLE(CMD_ARGV[0], arm->is_semihosting_fileio);
+
+       command_print(CMD_CTX, "semihosting fileio is %s",
+               arm->is_semihosting_fileio
+               ? "enabled" : "disabled");
+
+       return ERROR_OK;
+}
+
 static const struct command_registration arm_exec_command_handlers[] = {
        {
                .name = "reg",
@@ -1097,6 +1133,13 @@ static const struct command_registration arm_exec_command_handlers[] = {
                .usage = "['enable'|'disable']",
                .help = "activate support for semihosting operations",
        },
+       {
+               "semihosting_fileio",
+               .handler = handle_arm_semihosting_fileio_command,
+               .mode = COMMAND_EXEC,
+               .usage = "['enable'|'disable']",
+               .help = "activate support for semihosting fileio operations",
+       },
 
        COMMAND_REGISTRATION_DONE
 };
@@ -1486,7 +1529,7 @@ cleanup:
  *
  */
 int arm_blank_check_memory(struct target *target,
-       uint32_t address, uint32_t count, uint32_t *blank)
+       uint32_t address, uint32_t count, uint32_t *blank, uint8_t erased_value)
 {
        struct working_area *check_algorithm;
        struct reg_param reg_params[3];
@@ -1502,6 +1545,12 @@ int arm_blank_check_memory(struct target *target,
 
        assert(sizeof(check_code_le) % 4 == 0);
 
+       if (erased_value != 0xff) {
+               LOG_ERROR("Erase value 0x%02" PRIx8 " not yet supported for ARMv4/v5 targets",
+                       erased_value);
+               return ERROR_FAIL;
+       }
+
        /* make sure we have a working area */
        retval = target_alloc_working_area(target,
                        sizeof(check_code_le), &check_algorithm);
@@ -1529,7 +1578,7 @@ int arm_blank_check_memory(struct target *target,
        buf_set_u32(reg_params[1].value, 0, 32, count);
 
        init_reg_param(&reg_params[2], "r2", 32, PARAM_IN_OUT);
-       buf_set_u32(reg_params[2].value, 0, 32, 0xff);
+       buf_set_u32(reg_params[2].value, 0, 32, erased_value);
 
        /* armv4 must exit using a hardware breakpoint */
        if (arm->is_armv4)