1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
4  * Copyright (c) 2014 Juergen Weiss <weiss@uni-mainz.de>
47 #include <arm/freescale/imx/imx6_machdep.h>
76 	bus_space_handle_t scu;  in imx6_mp_setmaxid()  local
84 	if (bus_space_map(fdtbus_bs_tag, SCU_PHYSBASE, SCU_SIZE, 0, &scu) != 0)  in imx6_mp_setmaxid()
85 		panic("Couldn't map the SCU\n");  in imx6_mp_setmaxid()
86 	val = bus_space_read_4(fdtbus_bs_tag, scu, SCU_CONFIG_REG);  in imx6_mp_setmaxid()
88 	bus_space_unmap(fdtbus_bs_tag, scu, SCU_SIZE);  in imx6_mp_setmaxid()
96 	mp_maxid = ncpu - 1;  in imx6_mp_setmaxid()
102 	bus_space_handle_t scu;  in imx6_mp_start_ap()  local
108 	if (bus_space_map(fdtbus_bs_tag, SCU_PHYSBASE, SCU_SIZE, 0, &scu) != 0)  in imx6_mp_start_ap()
109 		panic("Couldn't map the SCU\n");  in imx6_mp_start_ap()
114 	 * Invalidate SCU cache tags.  The 0x0000ffff constant invalidates all  in imx6_mp_start_ap()
115 	 * ways on all cores 0-3.  Per the ARM docs, it's harmless to write to  in imx6_mp_start_ap()
118 	bus_space_write_4(fdtbus_bs_tag, scu, SCU_INV_TAGS_REG, 0x0000ffff);  in imx6_mp_start_ap()
122 	 * Setting the "disable-migratory bit" in the undocumented SCU  in imx6_mp_start_ap()
125 	val = bus_space_read_4(fdtbus_bs_tag, scu, SCU_DIAG_CONTROL);  in imx6_mp_start_ap()
126 	bus_space_write_4(fdtbus_bs_tag, scu, SCU_DIAG_CONTROL,   in imx6_mp_start_ap()
130 	 * Enable the SCU, then clean the cache on this core.  After these two  in imx6_mp_start_ap()
131 	 * operations the cache tag ram in the SCU is coherent with the contents  in imx6_mp_start_ap()
134 	 * their SCU tag ram above, so they will be coherent from startup.  in imx6_mp_start_ap()
136 	val = bus_space_read_4(fdtbus_bs_tag, scu, SCU_CONTROL_REG);  in imx6_mp_start_ap()
137 	bus_space_write_4(fdtbus_bs_tag, scu, SCU_CONTROL_REG,   in imx6_mp_start_ap()
143 	 * and set the core-enable and core-reset bits in the control register.  in imx6_mp_start_ap()
151 		val |= ((1 << (SRC_CONTROL_C1ENA_SHIFT - 1 + i )) |  in imx6_mp_start_ap()
152 		    ( 1 << (SRC_CONTROL_C1RST_SHIFT - 1 + i)));  in imx6_mp_start_ap()
159 	bus_space_unmap(fdtbus_bs_tag, scu, SCU_SIZE);  in imx6_mp_start_ap()