Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2015, 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 <arch_helpers.h> |
Soby Mathew | 0d9e852 | 2015-07-15 13:36:24 +0100 | [diff] [blame] | 32 | #include <arm_def.h> |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 33 | #include <assert.h> |
| 34 | #include <errno.h> |
Soby Mathew | 7799cf7 | 2015-04-16 14:49:09 +0100 | [diff] [blame] | 35 | #include <plat_arm.h> |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 36 | #include <psci.h> |
| 37 | |
Soby Mathew | 7799cf7 | 2015-04-16 14:49:09 +0100 | [diff] [blame] | 38 | #if ARM_RECOM_STATE_ID_ENC |
| 39 | extern unsigned int arm_pm_idle_states[]; |
| 40 | #endif /* __ARM_RECOM_STATE_ID_ENC__ */ |
| 41 | |
| 42 | |
| 43 | #if !ARM_RECOM_STATE_ID_ENC |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 44 | /******************************************************************************* |
Soby Mathew | fec4eb7 | 2015-07-01 16:16:20 +0100 | [diff] [blame] | 45 | * ARM standard platform handler called to check the validity of the power state |
| 46 | * parameter. |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 47 | ******************************************************************************/ |
Soby Mathew | fec4eb7 | 2015-07-01 16:16:20 +0100 | [diff] [blame] | 48 | int arm_validate_power_state(unsigned int power_state, |
| 49 | psci_power_state_t *req_state) |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 50 | { |
Soby Mathew | fec4eb7 | 2015-07-01 16:16:20 +0100 | [diff] [blame] | 51 | int pstate = psci_get_pstate_type(power_state); |
| 52 | int pwr_lvl = psci_get_pstate_pwrlvl(power_state); |
| 53 | int i; |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 54 | |
Soby Mathew | fec4eb7 | 2015-07-01 16:16:20 +0100 | [diff] [blame] | 55 | assert(req_state); |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 56 | |
Soby Mathew | fec4eb7 | 2015-07-01 16:16:20 +0100 | [diff] [blame] | 57 | if (pwr_lvl > PLAT_MAX_PWR_LVL) |
| 58 | return PSCI_E_INVALID_PARAMS; |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 59 | |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 60 | /* Sanity check the requested state */ |
Soby Mathew | fec4eb7 | 2015-07-01 16:16:20 +0100 | [diff] [blame] | 61 | if (pstate == PSTATE_TYPE_STANDBY) { |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 62 | /* |
Soby Mathew | fec4eb7 | 2015-07-01 16:16:20 +0100 | [diff] [blame] | 63 | * It's possible to enter standby only on power level 0 |
| 64 | * Ignore any other power level. |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 65 | */ |
Soby Mathew | fec4eb7 | 2015-07-01 16:16:20 +0100 | [diff] [blame] | 66 | if (pwr_lvl != ARM_PWR_LVL0) |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 67 | return PSCI_E_INVALID_PARAMS; |
Soby Mathew | fec4eb7 | 2015-07-01 16:16:20 +0100 | [diff] [blame] | 68 | |
| 69 | req_state->pwr_domain_state[ARM_PWR_LVL0] = |
| 70 | ARM_LOCAL_STATE_RET; |
| 71 | } else { |
| 72 | for (i = ARM_PWR_LVL0; i <= pwr_lvl; i++) |
| 73 | req_state->pwr_domain_state[i] = |
| 74 | ARM_LOCAL_STATE_OFF; |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | /* |
| 78 | * We expect the 'state id' to be zero. |
| 79 | */ |
| 80 | if (psci_get_pstate_id(power_state)) |
| 81 | return PSCI_E_INVALID_PARAMS; |
| 82 | |
Soby Mathew | 7799cf7 | 2015-04-16 14:49:09 +0100 | [diff] [blame] | 83 | return PSCI_E_SUCCESS; |
| 84 | } |
| 85 | |
| 86 | #else |
| 87 | /******************************************************************************* |
| 88 | * ARM standard platform handler called to check the validity of the power |
| 89 | * state parameter. The power state parameter has to be a composite power |
| 90 | * state. |
| 91 | ******************************************************************************/ |
| 92 | int arm_validate_power_state(unsigned int power_state, |
| 93 | psci_power_state_t *req_state) |
| 94 | { |
| 95 | unsigned int state_id; |
| 96 | int i; |
| 97 | |
| 98 | assert(req_state); |
| 99 | |
| 100 | /* |
| 101 | * Currently we are using a linear search for finding the matching |
| 102 | * entry in the idle power state array. This can be made a binary |
| 103 | * search if the number of entries justify the additional complexity. |
| 104 | */ |
| 105 | for (i = 0; !!arm_pm_idle_states[i]; i++) { |
| 106 | if (power_state == arm_pm_idle_states[i]) |
| 107 | break; |
| 108 | } |
| 109 | |
| 110 | /* Return error if entry not found in the idle state array */ |
| 111 | if (!arm_pm_idle_states[i]) |
| 112 | return PSCI_E_INVALID_PARAMS; |
| 113 | |
| 114 | i = 0; |
| 115 | state_id = psci_get_pstate_id(power_state); |
| 116 | |
| 117 | /* Parse the State ID and populate the state info parameter */ |
| 118 | while (state_id) { |
| 119 | req_state->pwr_domain_state[i++] = state_id & |
| 120 | ARM_LOCAL_PSTATE_MASK; |
| 121 | state_id >>= ARM_LOCAL_PSTATE_WIDTH; |
| 122 | } |
| 123 | |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 124 | return PSCI_E_SUCCESS; |
| 125 | } |
Soby Mathew | 7799cf7 | 2015-04-16 14:49:09 +0100 | [diff] [blame] | 126 | #endif /* __ARM_RECOM_STATE_ID_ENC__ */ |
Soby Mathew | 0d9e852 | 2015-07-15 13:36:24 +0100 | [diff] [blame] | 127 | |
| 128 | /******************************************************************************* |
| 129 | * ARM standard platform handler called to check the validity of the non secure |
| 130 | * entrypoint. |
| 131 | ******************************************************************************/ |
| 132 | int arm_validate_ns_entrypoint(uintptr_t entrypoint) |
| 133 | { |
| 134 | /* |
| 135 | * Check if the non secure entrypoint lies within the non |
| 136 | * secure DRAM. |
| 137 | */ |
| 138 | if ((entrypoint >= ARM_NS_DRAM1_BASE) && (entrypoint < |
| 139 | (ARM_NS_DRAM1_BASE + ARM_NS_DRAM1_SIZE))) |
| 140 | return PSCI_E_SUCCESS; |
| 141 | if ((entrypoint >= ARM_DRAM2_BASE) && (entrypoint < |
| 142 | (ARM_DRAM2_BASE + ARM_DRAM2_SIZE))) |
| 143 | return PSCI_E_SUCCESS; |
| 144 | |
| 145 | return PSCI_E_INVALID_ADDRESS; |
| 146 | } |