1 files changed, 53 insertions, 0 deletions

diff --git a/include/litmus/rt_param.h b/include/litmus/rt_param.h
index a7a183f34a80..9927b09e0a01 100644
--- a/include/litmus/rt_param.h
+++ b/include/litmus/rt_param.h
@@ -1,3 +1,5 @@
+#include <linux/threads.h>
+
 /*
  * Definition of the scheduler plugin interface.
  *
@@ -33,6 +35,36 @@ typedef enum {
         PRECISE_ENFORCEMENT  /* NOT IMPLEMENTED - enforced with hrtimers */
 } budget_policy_t;
 
+/* The parameters for the EDF-WM semi-partitioned scheduler.
+ * Each task may be split across multiple cpus. Each per-cpu allocation
+ * is called a 'slice'.
+ */
+#define MAX_EDF_WM_SLICES 24
+#define MIN_EDF_WM_SLICE_SIZE 50000 /* .05 millisecond = 50us */
+
+struct edf_wm_slice {
+        /* on which CPU is this slice allocated */
+        unsigned int cpu;
+        /* relative deadline from job release (not from slice release!) */
+        lt_t deadline;
+        /* budget of this slice; must be precisely enforced */
+        lt_t budget;
+        /* offset of this slice relative to the job release */
+        lt_t offset;
+};
+
+/* If a job is not sliced across multiple CPUs, then
+ * count is set to zero and none of the slices is used.
+ * This implies that count == 1 is illegal.
+ */
+struct edf_wm_params {
+        /* enumeration of all slices */
+        struct edf_wm_slice slices[MAX_EDF_WM_SLICES];
+
+        /* how many slices are defined? */
+        unsigned int count;
+};
+
 struct rt_task {
         lt_t            exec_cost;
         lt_t            period;
@@ -40,6 +72,12 @@ struct rt_task {
         unsigned int    cpu;
         task_class_t    cls;
         budget_policy_t budget_policy; /* ignored by pfair */
+
+        /* parameters used by the semi-partitioned algorithms */
+        union {
+                /* EDF-WM; defined in sched_edf_wm.c */
+                struct edf_wm_params wm;
+        } semi_part;
 };
 
 /* The definition of the data that is shared between the kernel and real-time
@@ -184,6 +222,21 @@ struct rt_param {
 
         /* Pointer to the page shared between userspace and kernel. */
         struct control_page * ctrl_page;
+
+        /* runtime info for the semi-part plugins */
+        union {
+                /* EDF-WM runtime information */
+                struct {
+                        /* at which exec time did the current slice start? */
+                        lt_t exec_time;
+                        /* when did the job suspend? */
+                        lt_t suspend_time;
+                        /* cached job parameters */
+                        lt_t job_release, job_deadline;
+                        /* pointer to the current slice */
+                        struct edf_wm_slice* slice;
+                } wm;
+        } semi_part;
 };
 
 /*      Possible RT flags       */