Changes in kernel/arch/ia64/src/start.S [d9ee2ea:fe7abd0] in mainline

File:

• kernel/arch/ia64/src/start.S (modified) (4 diffs)

kernel/arch/ia64/src/start.S

@@ -47 +47 @@
 
 stack0:
+
+#
+# Kernel entry point.
+#
+# This is where we are passed control from the boot code.
+# Register contents:
+#
+#       r2      Address of the boot code's bootinfo structure.
+#
 kernel_image_start:
         .auto
-        
-#ifdef CONFIG_SMP
-        # Identify self(CPU) in OS structures by ID / EID
-        
-        mov r9 = cr64
-        mov r10 = 1
-        movl r12 = 0xffffffff
-        movl r8 = cpu_by_id_eid_list
-        and r8 = r8, r12
-        shr r9 = r9, 16
-        add r8 = r8, r9
-        st1 [r8] = r10
-#endif
         
         mov psr.l = r0
@@ -164 +160 @@
         bsw.1
         
-#ifdef CONFIG_SMP
-        # Am I BSP or AP?
-        movl r20 = bsp_started ;;
-        ld8 r20 = [r20] ;;
-        cmp.eq p3, p2 = r20, r0 ;;
-#else
-        cmp.eq p3, p2 = r0, r0 ;;  /* you are BSP */
-#endif  /* CONFIG_SMP */
-        
         # Initialize register stack
         mov ar.rsc = r0
@@ -179 +166 @@
         loadrs
         
-        # Initialize memory stack to some sane value
-        movl r12 = stack0 ;;
-        add r12 = -16, r12  /* allocate a scratch area on the stack */
+        #
+        # Initialize memory stack to some sane value and allocate a scratch are
+        # on it.
+        #
+        movl sp = stack0 ;;
+        add sp = -16, sp
         
         # Initialize gp (Global Pointer) register
+        movl gp = kernel_image_start
+        
+        #       
+        # Initialize bootinfo on BSP.
+        #
         movl r20 = (VRN_KERNEL << VRN_SHIFT) ;;
-        or r20 = r20, r1 ;;
-        movl r1 = kernel_image_start
-        
-        /*
-         * Initialize bootinfo on BSP.
-         */
-(p3)    addl r21 = @gprel(bootinfo), gp ;;
-(p3)    st8 [r21] = r20
+        or r20 = r20, r2 ;;
+        addl r21 = @gprel(bootinfo), gp ;;
+        st8 [r21] = r20
         
         ssm (1 << 19) ;; /* Disable f32 - f127 */
@@ -198 +188 @@
         srlz.d ;;
         
-#ifdef CONFIG_SMP
-(p2)    movl r18 = main_ap ;;
-(p2)    mov b1 = r18 ;;
-(p2)    br.call.sptk.many b0 = b1
-        
-        # Mark that BSP is on
-        
-        mov r20 = 1 ;;
-        movl r21 = bsp_started ;;
-        st8 [r21] = r20 ;;
-#endif
-        
         br.call.sptk.many b0 = arch_pre_main
-        
-        movl r18 = main_bsp ;;
-        mov b1 = r18 ;;
-        br.call.sptk.many b0 = b1
-
+0:
+        br.call.sptk.many b0 = main_bsp
 0:
         br 0b
-
-#ifdef CONFIG_SMP
-
-.align 4096
-kernel_image_ap_start:
-        .auto
-        
-        # Identify self(CPU) in OS structures by ID / EID
-        
-        mov r9 = cr64
-        mov r10 = 1
-        movl r12 = 0xffffffff
-        movl r8 = cpu_by_id_eid_list
-        and r8 = r8, r12
-        shr r9 = r9, 16
-        add r8 = r8, r9
-        st1 [r8] = r10
-        
-        # Wait for wakeup synchro signal (#3 in cpu_by_id_eid_list)
-
-kernel_image_ap_start_loop:
-        movl r11 = kernel_image_ap_start_loop
-        and r11 = r11, r12
-        mov b1 = r11
-        
-        ld1 r20 = [r8]
-        movl r21 = 3
-        cmp.eq p2, p3 = r20, r21
-(p3)    br.call.sptk.many b0 = b1
-        
-        movl r11 = kernel_image_start
-        and r11 = r11, r12
-        mov b1 = r11
-        br.call.sptk.many b0 = b1
-
-.align 16
-.global bsp_started
-bsp_started:
-        .space 8
-
-.align 4096
-.global cpu_by_id_eid_list
-cpu_by_id_eid_list:
-        .space 65536
-
-#endif  /* CONFIG_SMP */