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exosphere: Add support for AMS SMC extensions
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c42fc16d8e
commit
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4 changed files with 103 additions and 9 deletions
33
exosphere/src/smc_ams.c
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33
exosphere/src/smc_ams.c
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/*
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* Copyright (c) 2018 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <string.h>
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#include "utils.h"
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#include "smc_api.h"
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#include "smc_ams.h"
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uint32_t ams_iram_copy(smc_args_t *args) {
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/* TODO: Implement a DRAM <-> IRAM copy of up to one page here. */
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/* This operation is necessary to implement reboot-to-payload. */
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/* args->X[1] = DRAM address (translated by kernel). */
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/* args->X[2] = IRAM address. */
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/* args->X[3] = size (must be <= 0x1000). */
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/* args->X[4] = 0 for read, 1 for write. */
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return 2;
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}
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24
exosphere/src/smc_ams.h
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24
exosphere/src/smc_ams.h
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/*
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* Copyright (c) 2018 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef EXOSPHERE_SMC_AMS_H
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#define EXOSPHERE_SMC_AMS_H
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#include "smc_api.h"
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uint32_t ams_iram_copy(smc_args_t *args);
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#endif
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@ -31,6 +31,7 @@
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#include "sealedkeys.h"
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#include "smc_api.h"
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#include "smc_user.h"
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#include "smc_ams.h"
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#include "se.h"
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#include "userpage.h"
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#include "titlekey.h"
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@ -40,6 +41,8 @@
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#define SMC_USER_HANDLERS 0x13
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#define SMC_PRIV_HANDLERS 0x9
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#define SMC_AMS_HANDLERS 0x2
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#define DEBUG_LOG_SMCS 0
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#define DEBUG_PANIC_ON_FAILURE 0
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@ -77,6 +80,9 @@ uint32_t smc_panic(smc_args_t *args);
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uint32_t smc_configure_carveout(smc_args_t *args);
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uint32_t smc_read_write_register(smc_args_t *args);
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/* Atmosphere SMC prototypes */
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uint32_t smc_ams_iram_copy(smc_args_t *args);
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typedef struct {
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uint32_t id;
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uint32_t (*handler)(smc_args_t *args);
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@ -121,7 +127,13 @@ static smc_table_entry_t g_smc_priv_table[SMC_PRIV_HANDLERS] = {
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{0xC3000008, smc_read_write_register}
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};
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static smc_table_t g_smc_tables[2] = {
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/* This is a table used for atmosphere-specific SMCs. */
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static smc_table_entry_t g_smc_ams_table[SMC_AMS_HANDLERS] = {
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{0, NULL},
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{0xF0000201, smc_ams_iram_copy},
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};
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static smc_table_t g_smc_tables[SMC_HANDLER_COUNT + 1] = {
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{ /* SMC_HANDLER_USER */
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g_smc_user_table,
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SMC_USER_HANDLERS
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@ -129,6 +141,10 @@ static smc_table_t g_smc_tables[2] = {
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{ /* SMC_HANDLER_PRIV */
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g_smc_priv_table,
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SMC_PRIV_HANDLERS
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},
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{ /* SMC_HANDLER_AMS */
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g_smc_ams_table,
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SMC_AMS_HANDLERS
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}
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};
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@ -228,19 +244,25 @@ void clear_smc_callback(uint64_t key) {
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_Atomic uint64_t num_smcs_called = 0;
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void call_smc_handler(uint32_t handler_id, smc_args_t *args) {
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unsigned char smc_id;
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unsigned char smc_id, call_range;
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unsigned int result;
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unsigned int (*smc_handler)(smc_args_t *args);
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/* Validate top-level handler. */
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if (handler_id != SMC_HANDLER_USER && handler_id != SMC_HANDLER_PRIV) {
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if (handler_id >= SMC_HANDLER_COUNT) {
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generic_panic();
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}
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/* Validate core is appropriate for handler. */
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if (handler_id == SMC_HANDLER_USER && get_core_id() != 3) {
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/* USER SMCs must be called via svcCallSecureMonitor on core 3 (where spl runs) */
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generic_panic();
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/* If user-handler, detect if talking to Atmosphere/validate calling core. */
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if (handler_id == SMC_HANDLER_USER) {
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if ((call_range = (unsigned char)((args->X[0] >> 24) & 0x3F)) == SMC_CALL_RANGE_TRUSTED_APP) {
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/* Nintendo's SMCs are all OEM-specific. */
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/* Pending a reason not to, we will treat Trusted Application SMCs as intended to talk to Atmosphere. */
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handler_id = SMC_HANDLER_AMS;
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} else if (get_core_id() != 3) {
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/* USER SMCs must be called via svcCallSecureMonitor on core 3 (where spl runs) */
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generic_panic();
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}
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}
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/* Validate sub-handler index */
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@ -683,3 +705,7 @@ uint32_t smc_panic(smc_args_t *args) {
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uint32_t color = ((args->X[1] & 0xF) << 8) | ((args->X[1] & 0xF0)) | ((args->X[1] & 0xF00) >> 8);
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panic((color << 20) | 0x40);
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}
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uint32_t smc_ams_iram_copy(smc_args_t *args) {
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return smc_wrapper_sync(args, ams_iram_copy);
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}
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@ -19,8 +19,19 @@
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#include <stdint.h>
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#define SMC_HANDLER_USER 0
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#define SMC_HANDLER_PRIV 1
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#define SMC_HANDLER_USER 0
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#define SMC_HANDLER_PRIV 1
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#define SMC_HANDLER_COUNT 2
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#define SMC_HANDLER_AMS (SMC_HANDLER_COUNT)
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#define SMC_CALL_RANGE_ARM_ARCH 0
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#define SMC_CALL_RANGE_CPU 1
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#define SMC_CALL_RANGE_SIP 2
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#define SMC_CALL_RANGE_OEM 3
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#define SMC_CALL_RANGE_STANDARD 4
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#define SMC_CALL_RANGE_TRUSTED_APP 0x30
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typedef struct {
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uint64_t X[8];
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