1 /* 2 * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <bakery_lock.h> 32 #include <mmio.h> 33 #include "../../fvp_def.h" 34 #include "../../fvp_private.h" 35 #include "fvp_pwrc.h" 36 37 /* 38 * TODO: Someday there will be a generic power controller api. At the moment 39 * each platform has its own pwrc so just exporting functions is fine. 40 */ 41 #if USE_COHERENT_MEM 42 static bakery_lock_t pwrc_lock __attribute__ ((section("tzfw_coherent_mem"))); 43 #define LOCK_ARG &pwrc_lock 44 #else 45 #define LOCK_ARG FVP_PWRC_BAKERY_ID 46 #endif 47 48 unsigned int fvp_pwrc_get_cpu_wkr(unsigned long mpidr) 49 { 50 return PSYSR_WK(fvp_pwrc_read_psysr(mpidr)); 51 } 52 53 unsigned int fvp_pwrc_read_psysr(unsigned long mpidr) 54 { 55 unsigned int rc; 56 fvp_lock_get(LOCK_ARG); 57 mmio_write_32(PWRC_BASE + PSYSR_OFF, (unsigned int) mpidr); 58 rc = mmio_read_32(PWRC_BASE + PSYSR_OFF); 59 fvp_lock_release(LOCK_ARG); 60 return rc; 61 } 62 63 void fvp_pwrc_write_pponr(unsigned long mpidr) 64 { 65 fvp_lock_get(LOCK_ARG); 66 mmio_write_32(PWRC_BASE + PPONR_OFF, (unsigned int) mpidr); 67 fvp_lock_release(LOCK_ARG); 68 } 69 70 void fvp_pwrc_write_ppoffr(unsigned long mpidr) 71 { 72 fvp_lock_get(LOCK_ARG); 73 mmio_write_32(PWRC_BASE + PPOFFR_OFF, (unsigned int) mpidr); 74 fvp_lock_release(LOCK_ARG); 75 } 76 77 void fvp_pwrc_set_wen(unsigned long mpidr) 78 { 79 fvp_lock_get(LOCK_ARG); 80 mmio_write_32(PWRC_BASE + PWKUPR_OFF, 81 (unsigned int) (PWKUPR_WEN | mpidr)); 82 fvp_lock_release(LOCK_ARG); 83 } 84 85 void fvp_pwrc_clr_wen(unsigned long mpidr) 86 { 87 fvp_lock_get(LOCK_ARG); 88 mmio_write_32(PWRC_BASE + PWKUPR_OFF, 89 (unsigned int) mpidr); 90 fvp_lock_release(LOCK_ARG); 91 } 92 93 void fvp_pwrc_write_pcoffr(unsigned long mpidr) 94 { 95 fvp_lock_get(LOCK_ARG); 96 mmio_write_32(PWRC_BASE + PCOFFR_OFF, (unsigned int) mpidr); 97 fvp_lock_release(LOCK_ARG); 98 } 99 100 /* Nothing else to do here apart from initializing the lock */ 101 int fvp_pwrc_setup(void) 102 { 103 fvp_lock_init(LOCK_ARG); 104 105 return 0; 106 } 107 108 109 110
