+
+int mips64_ejtag_config_step(struct mips_ejtag *ejtag_info, bool enable_step)
+{
+ const uint32_t code_enable[] = {
+ MIPS64_MTC0(1, 31, 0), /* move $1 to COP0 DeSave */
+ MIPS64_MFC0(1, 23, 0), /* move COP0 Debug to $1 */
+ MIPS64_ORI(1, 1, 0x0100), /* set SSt bit in debug reg */
+ MIPS64_MTC0(1, 23, 0), /* move $1 to COP0 Debug */
+ MIPS64_B(NEG16(5)),
+ MIPS64_MFC0(1, 31, 0), /* move COP0 DeSave to $1 */
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ };
+
+ const uint32_t code_disable[] = {
+ MIPS64_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
+ MIPS64_LUI(15, UPPER16(MIPS64_PRACC_STACK)), /* $15 = MIPS64_PRACC_STACK */
+ MIPS64_ORI(15, 15, LOWER16(MIPS64_PRACC_STACK)),
+ MIPS64_SD(1, 0, 15), /* sw $1,($15) */
+ MIPS64_SD(2, 0, 15), /* sw $2,($15) */
+ MIPS64_MFC0(1, 23, 0), /* move COP0 Debug to $1 */
+ MIPS64_LUI(2, 0xFFFF), /* $2 = 0xfffffeff */
+ MIPS64_ORI(2, 2, 0xFEFF),
+ MIPS64_AND(1, 1, 2),
+ MIPS64_MTC0(1, 23, 0), /* move $1 to COP0 Debug */
+ MIPS64_LD(2, 0, 15),
+ MIPS64_LD(1, 0, 15),
+ MIPS64_SYNC,
+ MIPS64_B(NEG16(14)),
+ MIPS64_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ };
+ const uint32_t *code = enable_step ? code_enable : code_disable;
+ unsigned code_len = enable_step ? ARRAY_SIZE(code_enable) :
+ ARRAY_SIZE(code_disable);
+
+ return mips64_pracc_exec(ejtag_info,
+ code_len, code, 0, NULL, 0, NULL);
+}
+
+int mips64_ejtag_exit_debug(struct mips_ejtag *ejtag_info)
+{
+ const uint32_t code[] = {
+ MIPS64_DRET,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ };
+ LOG_DEBUG("enter mips64_pracc_exec");
+ return mips64_pracc_exec(ejtag_info,
+ ARRAY_SIZE(code), code, 0, NULL, 0, NULL);
+}
+
+int mips64_ejtag_fastdata_scan(struct mips_ejtag *ejtag_info, bool write_t, uint64_t *data)
+{
+ struct jtag_tap *tap;
+
+ tap = ejtag_info->tap;
+ assert(tap);
+
+ struct scan_field fields[2];
+ uint8_t spracc = 0;
+ uint8_t t[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+
+ /* fastdata 1-bit register */
+ fields[0].num_bits = 1;
+ fields[0].out_value = &spracc;
+ fields[0].in_value = NULL;
+
+ /* processor access data register 64 bit */
+ fields[1].num_bits = 64;
+ fields[1].out_value = t;
+
+ if (write_t) {
+ fields[1].in_value = NULL;
+ buf_set_u64(t, 0, 64, *data);
+ } else
+ fields[1].in_value = (uint8_t *) data;
+
+ jtag_add_dr_scan(tap, 2, fields, TAP_IDLE);
+
+ if (!write_t && data)
+ jtag_add_callback(mips_le_to_h_u64,
+ (jtag_callback_data_t) data);
+ keep_alive();
+
+ return ERROR_OK;
+}