| developer | 550bf5e | 2016-07-11 16:05:23 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016, 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 <stdint.h> |
| 32 | #include <arch_helpers.h> |
| 33 | #include <mmio.h> |
| 34 | #include <mt_cpuxgpt.h> |
| 35 | #include <stdint.h> |
| 36 | #include <platform.h> |
| 37 | #include <debug.h> |
| 38 | #define CPUXGPT_BASE 0x10200000 |
| 39 | #define INDEX_BASE (CPUXGPT_BASE+0x0674) |
| 40 | #define CTL_BASE (CPUXGPT_BASE+0x0670) |
| 41 | |
| 42 | uint64_t normal_time_base; |
| 43 | uint64_t atf_time_base; |
| 44 | |
| 45 | void sched_clock_init(uint64_t normal_base, uint64_t atf_base) |
| 46 | { |
| 47 | normal_time_base = normal_base; |
| 48 | atf_time_base = atf_base; |
| 49 | } |
| 50 | |
| 51 | uint64_t sched_clock(void) |
| 52 | { |
| 53 | uint64_t cval; |
| 54 | |
| 55 | cval = (((read_cntpct_el0() - atf_time_base)*1000)/ |
| 56 | SYS_COUNTER_FREQ_IN_MHZ) + normal_time_base; |
| 57 | return cval; |
| 58 | } |
| 59 | |
| 60 | /* |
| 61 | * Return: 0 - Trying to disable the CPUXGPT control bit, |
| 62 | * and not allowed to disable it. |
| 63 | * Return: 1 - reg_addr is not realted to disable the control bit. |
| 64 | */ |
| 65 | unsigned char check_cpuxgpt_write_permission(unsigned int reg_addr, |
| 66 | unsigned int reg_value) |
| 67 | { |
| 68 | unsigned int idx; |
| 69 | unsigned int ctl_val; |
| 70 | |
| 71 | if (reg_addr == CTL_BASE) { |
| 72 | idx = mmio_read_32(INDEX_BASE); |
| 73 | |
| 74 | /* idx 0: CPUXGPT system control */ |
| 75 | if (idx == 0) { |
| 76 | ctl_val = mmio_read_32(CTL_BASE); |
| 77 | if (ctl_val & 1) { |
| 78 | /* |
| 79 | * if enable bit already set, |
| 80 | * then bit 0 is not allow to set as 0 |
| 81 | */ |
| 82 | if (!(reg_value & 1)) |
| 83 | return 0; |
| 84 | } |
| 85 | } |
| 86 | } |
| 87 | return 1; |
| 88 | } |
| 89 | |