Changes in kernel/arch/sparc64/src/smp/sun4v/smp.c [9280dd0:83dab11] in mainline

File:

• kernel/arch/sparc64/src/smp/sun4v/smp.c (modified) (2 diffs)

kernel/arch/sparc64/src/smp/sun4v/smp.c

@@ -81 +81 @@
 unsigned int max_core_strands = 0;
 
+#ifdef CONFIG_SIMICS_SMP_HACK
+/**
+ * Copies a piece of HelenOS code to the place where OBP had its IPI handler.
+ * By sending an IPI by the BSP to the AP the code will be executed.
+ * The code will jump to the first instruction of the kernel. This is
+ * a workaround how to make APs execute HelenOS code on Simics.
+ */
+static void simics_smp_hack_init(void) {
+        asm volatile (
+                "setx temp_cpu_mondo_handler, %g4, %g6 \n"
+                "setx 0x80200f80, %g4, %g7 \n"
+
+                "ldx [%g6], %g4 \n"
+                "stxa %g4, [%g7] 0x14 \n"
+                "membar #Sync \n"
+
+                "add %g7, 0x8, %g7 \n"
+                "ldx [%g6 + 0x8], %g4 \n"
+                "stxa %g4, [%g7] 0x14 \n"
+                "membar #Sync \n"
+
+                "add %g7, 0x8, %g7 \n"
+                "ldx [%g6 + 0x10], %g4 \n"
+                "stxa %g4, [%g7] 0x14 \n"
+                "membar #Sync \n"
+
+                "add %g7, 0x8, %g7 \n"
+                "ldx [%g6 + 0x18], %g4 \n"
+                "stxa %g4, [%g7] 0x14 \n"
+                "membar #Sync \n"
+
+                "add %g7, 0x8, %g7 \n"
+                "ldx [%g6 + 0x20], %g4 \n"
+                "stxa %g4, [%g7] 0x14 \n"
+                "membar #Sync \n"
+
+                "add %g7, 0x8, %g7 \n"
+                "ldx [%g6 + 0x28], %g4 \n"
+                "stxa %g4, [%g7] 0x14 \n"
+                "membar #Sync \n"
+
+                "add %g7, 0x8, %g7 \n"
+                "ldx [%g6 + 0x30], %g4 \n"
+                "stxa %g4, [%g7] 0x14 \n"
+                "membar #Sync \n"
+
+                "add %g7, 0x8, %g7 \n"
+                "ldx [%g6 + 0x38], %g4 \n"
+                "stxa %g4, [%g7] 0x14 \n"
+                "membar #Sync \n"
+
+                "add %g7, 0x8, %g7 \n"
+                "ldx [%g6 + 0x40], %g4 \n"
+                "stxa %g4, [%g7] 0x14 \n"
+                "membar #Sync \n"
+
+                "flush %i7"
+
+                );
+}
+#endif
+
 #if 0
 /**
@@ -310 +372 @@
 {
         detect_execution_units();
+#ifdef CONFIG_SIMICS_SMP_HACK
+        simics_smp_hack_init();
+#endif
 }