Varun Wadekar | 7a269e2 | 2015-06-10 14:04:32 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
dp-arm | fa3cf0b | 2017-05-03 09:38:09 +0100 | [diff] [blame] | 4 | * SPDX-License-Identifier: BSD-3-Clause |
Varun Wadekar | 7a269e2 | 2015-06-10 14:04:32 +0530 | [diff] [blame] | 5 | */ |
| 6 | |
Varun Wadekar | 7a269e2 | 2015-06-10 14:04:32 +0530 | [diff] [blame] | 7 | #include <assert.h> |
Varun Wadekar | 7a269e2 | 2015-06-10 14:04:32 +0530 | [diff] [blame] | 8 | #include <errno.h> |
Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 9 | |
| 10 | #include <arch.h> |
| 11 | #include <arch_helpers.h> |
| 12 | #include <common/bl_common.h> |
| 13 | #include <common/debug.h> |
| 14 | #include <lib/el3_runtime/context_mgmt.h> |
| 15 | |
Varun Wadekar | 7a269e2 | 2015-06-10 14:04:32 +0530 | [diff] [blame] | 16 | #include <tegra_private.h> |
| 17 | |
Varun Wadekar | 0f3baa0 | 2015-07-16 11:36:33 +0530 | [diff] [blame] | 18 | #define NS_SWITCH_AARCH32 1 |
| 19 | #define SCR_RW_BITPOS __builtin_ctz(SCR_RW_BIT) |
| 20 | |
| 21 | /******************************************************************************* |
Varun Wadekar | cbdace1 | 2015-09-03 14:32:44 +0530 | [diff] [blame] | 22 | * Tegra132 SiP SMCs |
Varun Wadekar | 0f3baa0 | 2015-07-16 11:36:33 +0530 | [diff] [blame] | 23 | ******************************************************************************/ |
Varun Wadekar | 0f3baa0 | 2015-07-16 11:36:33 +0530 | [diff] [blame] | 24 | #define TEGRA_SIP_AARCH_SWITCH 0x82000004 |
| 25 | |
| 26 | /******************************************************************************* |
| 27 | * SPSR settings for AARCH32/AARCH64 modes |
| 28 | ******************************************************************************/ |
| 29 | #define SPSR32 SPSR_MODE32(MODE32_svc, SPSR_T_ARM, SPSR_E_LITTLE, \ |
| 30 | DAIF_FIQ_BIT | DAIF_IRQ_BIT | DAIF_ABT_BIT) |
| 31 | #define SPSR64 SPSR_64(MODE_EL2, MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS) |
Varun Wadekar | 7a269e2 | 2015-06-10 14:04:32 +0530 | [diff] [blame] | 32 | |
| 33 | /******************************************************************************* |
Varun Wadekar | 923d04a | 2015-12-09 18:18:53 -0800 | [diff] [blame] | 34 | * This function is responsible for handling all T132 SiP calls |
Varun Wadekar | 7a269e2 | 2015-06-10 14:04:32 +0530 | [diff] [blame] | 35 | ******************************************************************************/ |
Varun Wadekar | 923d04a | 2015-12-09 18:18:53 -0800 | [diff] [blame] | 36 | int plat_sip_handler(uint32_t smc_fid, |
| 37 | uint64_t x1, |
| 38 | uint64_t x2, |
| 39 | uint64_t x3, |
| 40 | uint64_t x4, |
Anthony Zhou | e5bd345 | 2017-03-01 12:47:37 +0800 | [diff] [blame] | 41 | const void *cookie, |
Varun Wadekar | 923d04a | 2015-12-09 18:18:53 -0800 | [diff] [blame] | 42 | void *handle, |
| 43 | uint64_t flags) |
Varun Wadekar | 7a269e2 | 2015-06-10 14:04:32 +0530 | [diff] [blame] | 44 | { |
Varun Wadekar | 7a269e2 | 2015-06-10 14:04:32 +0530 | [diff] [blame] | 45 | switch (smc_fid) { |
| 46 | |
Varun Wadekar | 0f3baa0 | 2015-07-16 11:36:33 +0530 | [diff] [blame] | 47 | case TEGRA_SIP_AARCH_SWITCH: |
| 48 | |
| 49 | /* clean up the high bits */ |
| 50 | x1 = (uint32_t)x1; |
| 51 | x2 = (uint32_t)x2; |
| 52 | |
| 53 | if (!x1 || x2 > NS_SWITCH_AARCH32) { |
| 54 | ERROR("%s: invalid parameters\n", __func__); |
Varun Wadekar | 923d04a | 2015-12-09 18:18:53 -0800 | [diff] [blame] | 55 | return -EINVAL; |
Varun Wadekar | 0f3baa0 | 2015-07-16 11:36:33 +0530 | [diff] [blame] | 56 | } |
| 57 | |
| 58 | /* x1 = ns entry point */ |
| 59 | cm_set_elr_spsr_el3(NON_SECURE, x1, |
| 60 | (x2 == NS_SWITCH_AARCH32) ? SPSR32 : SPSR64); |
| 61 | |
| 62 | /* switch NS world mode */ |
| 63 | cm_write_scr_el3_bit(NON_SECURE, SCR_RW_BITPOS, !x2); |
| 64 | |
| 65 | INFO("CPU switched to AARCH%s mode\n", |
| 66 | (x2 == NS_SWITCH_AARCH32) ? "32" : "64"); |
Varun Wadekar | 923d04a | 2015-12-09 18:18:53 -0800 | [diff] [blame] | 67 | return 0; |
Varun Wadekar | 7a269e2 | 2015-06-10 14:04:32 +0530 | [diff] [blame] | 68 | |
| 69 | default: |
| 70 | ERROR("%s: unhandled SMC (0x%x)\n", __func__, smc_fid); |
| 71 | break; |
| 72 | } |
| 73 | |
Varun Wadekar | 923d04a | 2015-12-09 18:18:53 -0800 | [diff] [blame] | 74 | return -ENOTSUP; |
Varun Wadekar | 7a269e2 | 2015-06-10 14:04:32 +0530 | [diff] [blame] | 75 | } |