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
fvp_pwrc_get_cpu_wkr(unsigned long mpidr)48 unsigned int fvp_pwrc_get_cpu_wkr(unsigned long mpidr)
49 {
50 return PSYSR_WK(fvp_pwrc_read_psysr(mpidr));
51 }
52
fvp_pwrc_read_psysr(unsigned long mpidr)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
fvp_pwrc_write_pponr(unsigned long mpidr)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
fvp_pwrc_write_ppoffr(unsigned long mpidr)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
fvp_pwrc_set_wen(unsigned long mpidr)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
fvp_pwrc_clr_wen(unsigned long mpidr)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
fvp_pwrc_write_pcoffr(unsigned long mpidr)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 */
fvp_pwrc_setup(void)101 int fvp_pwrc_setup(void)
102 {
103 fvp_lock_init(LOCK_ARG);
104
105 return 0;
106 }
107
108
109
110