diff options
Diffstat (limited to 'services/std_svc/spm/spm_main.c')
| -rw-r--r-- | services/std_svc/spm/spm_main.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/services/std_svc/spm/spm_main.c b/services/std_svc/spm/spm_main.c index b1d5dd86..050c66cc 100644 --- a/services/std_svc/spm/spm_main.c +++ b/services/std_svc/spm/spm_main.c @@ -47,6 +47,39 @@ sp_context_t *spm_cpu_get_sp_ctx(unsigned int linear_id) } /******************************************************************************* + * Functions to keep track of how many requests a Secure Partition has received + * and hasn't finished. + ******************************************************************************/ +void spm_sp_request_increase(sp_context_t *sp_ctx) +{ + spin_lock(&(sp_ctx->request_count_lock)); + sp_ctx->request_count++; + spin_unlock(&(sp_ctx->request_count_lock)); +} + +void spm_sp_request_decrease(sp_context_t *sp_ctx) +{ + spin_lock(&(sp_ctx->request_count_lock)); + sp_ctx->request_count--; + spin_unlock(&(sp_ctx->request_count_lock)); +} + +/* Returns 0 if it was originally 0, -1 otherwise. */ +int spm_sp_request_increase_if_zero(sp_context_t *sp_ctx) +{ + int ret = -1; + + spin_lock(&(sp_ctx->request_count_lock)); + if (sp_ctx->request_count == 0U) { + sp_ctx->request_count++; + ret = 0U; + } + spin_unlock(&(sp_ctx->request_count_lock)); + + return ret; +} + +/******************************************************************************* * This function returns a pointer to the context of the Secure Partition that * handles the service specified by an UUID. It returns NULL if the UUID wasn't * found. |