[ARM] nommu: manage the CP15 things

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm / kernel / head-nommu.S

diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
index ac9eb3d30518ade76e1b01965fb969d90f856950..698a537915dd4ba5286f4909988934b8ad2d87f1 100644 (file)
--- a/arch/arm/kernel/head-nommu.S
+++ b/arch/arm/kernel/head-nommu.S
@@ -9,7 +9,6 @@
  * published by the Free Software Foundation.
  *
  *  Common kernel startup code (non-paged MM)
- *    for 32-bit CPUs which has a process ID register(CP15).
  *
  */
 #include <linux/linkage.h>
@@ -40,7 +39,11 @@
 ENTRY(stext)
        msr     cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE @ ensure svc mode
                                                @ and irqs disabled
+#ifndef CONFIG_CPU_CP15
+       ldr     r9, =CONFIG_PROCESSOR_ID
+#else
        mrc     p15, 0, r9, c0, c0              @ get processor id
+#endif
        bl      __lookup_processor_type         @ r5=procinfo r9=cpuid
        movs    r10, r5                         @ invalid processor (r5=0)?
        beq     __error_p                               @ yes, error 'p'
@@ -58,6 +61,7 @@ ENTRY(stext)
  */
        .type   __after_proc_init, %function
 __after_proc_init:
+#ifdef CONFIG_CPU_CP15
        mrc     p15, 0, r0, c1, c0, 0           @ read control reg
 #ifdef CONFIG_ALIGNMENT_TRAP
        orr     r0, r0, #CR_A
@@ -74,6 +78,7 @@ __after_proc_init:
        bic     r0, r0, #CR_I
 #endif
        mcr     p15, 0, r0, c1, c0, 0           @ write control reg
+#endif /* CONFIG_CPU_CP15 */
 
        mov     pc, r13                         @ clear the BSS and jump
                                                @ to start_kernel