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Skeleton for smcGetConfig and smcSetConfig

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This commit is contained in:
Michael Scire 2018-02-19 00:41:19 -08:00
parent f629a629d1
commit f77cae48d0
4 changed files with 114 additions and 1 deletions
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20
exosphere/smc_api.c
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@ -1,6 +1,7 @@
#include <stdint.h>
#include "utils.h"
#include "configitem.h"
#include "cpu_context.h"
#include "smc_api.h"
#include "smc_user.h"
@ -129,6 +130,12 @@ void call_smc_handler(uint32_t handler_id, smc_args_t *args) {
panic();
}
/* Validate core is appropriate for handler. */
if (handler_id == SMC_HANDLER_USER && get_core_id() != 3) {
/* USER SMCs must be called via svcCallSecureMonitor on core 3 (where spl runs) */
panic();
}
/* Validate sub-handler index */
if ((smc_id = (unsigned char)args->X[0]) >= g_smc_tables[handler_id].num_handlers) {
panic();
@ -185,6 +192,19 @@ uint32_t smc_wrapper_async(smc_args_t *args, uint32_t (*handler)(smc_args_t *),
return result;
}
uint32_t smc_set_config(smc_args_t *args) {
/* Actual value presumed in X3 on hardware. */
return configitem_set((enum ConfigItem)args->X[1], args->X[3]);
}
uint32_t smc_get_config(smc_args_t *args) {
uint64_t out_item = 0;
uint32_t result;
result = configitem_get((enum ConfigItem)args->X[1], &out_item);
args->X[1] = out_item;
return result;
}
uint32_t smc_check_status(smc_args_t *args) {
if (g_smc_callback_key == 0) {
return 4;