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-rw-r--r--bl31/context_mgmt.c40
1 files changed, 27 insertions, 13 deletions
diff --git a/bl31/context_mgmt.c b/bl31/context_mgmt.c
index 8d1396e..eae608c 100644
--- a/bl31/context_mgmt.c
+++ b/bl31/context_mgmt.c
@@ -31,6 +31,7 @@
#include <arch_helpers.h>
#include <assert.h>
#include <bl_common.h>
+#include <bl31.h>
#include <context.h>
#include <context_mgmt.h>
#include <platform.h>
@@ -47,6 +48,9 @@ typedef struct {
static context_info_t cm_context_info[PLATFORM_CORE_COUNT];
+/* The per_cpu_ptr_cache_t space allocation */
+static per_cpu_ptr_cache_t per_cpu_ptr_cache_space[PLATFORM_CORE_COUNT];
+
/*******************************************************************************
* Context management library initialisation routine. This library is used by
* runtime services to share pointers to 'cpu_context' structures for the secure
@@ -211,21 +215,31 @@ void cm_set_next_eret_context(uint32_t security_state)
: : "r" (ctx));
}
-/*******************************************************************************
- * This function is used to program exception stack in the 'cpu_context'
- * structure. This is the initial stack used for taking and handling exceptions
- * at EL3. This stack is expected to be initialized once by each security state
- ******************************************************************************/
-void cm_init_exception_stack(uint64_t mpidr, uint32_t security_state)
+/************************************************************************
+ * The following function is used to populate the per cpu pointer cache.
+ * The pointer will be stored in the tpidr_el3 register.
+ *************************************************************************/
+void cm_init_pcpu_ptr_cache()
{
- cpu_context_t *ctx;
- el3_state_t *state;
+ unsigned long mpidr = read_mpidr();
+ uint32_t linear_id = platform_get_core_pos(mpidr);
+ per_cpu_ptr_cache_t *pcpu_ptr_cache;
- ctx = cm_get_context(mpidr, security_state);
- assert(ctx);
+ pcpu_ptr_cache = &per_cpu_ptr_cache_space[linear_id];
+ assert(pcpu_ptr_cache);
+ pcpu_ptr_cache->crash_stack = get_crash_stack(mpidr);
+
+ cm_set_pcpu_ptr_cache(pcpu_ptr_cache);
+}
- /* Set exception stack in the context */
- state = get_el3state_ctx(ctx);
- write_ctx_reg(state, CTX_EXCEPTION_SP, get_exception_stack(mpidr));
+void cm_set_pcpu_ptr_cache(const void *pcpu_ptr)
+{
+ write_tpidr_el3((unsigned long)pcpu_ptr);
}
+
+void *cm_get_pcpu_ptr_cache(void)
+{
+ return (void *)read_tpidr_el3();
+}
+