[ARM] nommu: Initial uCLinux support for MMU-based CPUs

[linux-2.6-block.git] / arch / arm / mm / proc-v6.S

diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S
index ee6f152987350033fdf69586b8fe01314f5c28eb..ca13d4d05f6551e13fae4d9148fa7c7664e3da08 100644 (file)
--- a/arch/arm/mm/proc-v6.S
+++ b/arch/arm/mm/proc-v6.S
@@ -2,6 +2,7 @@
  *  linux/arch/arm/mm/proc-v6.S
  *
  *  Copyright (C) 2001 Deep Blue Solutions Ltd.
+ *  Modified by Catalin Marinas for noMMU support
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -29,38 +30,6 @@
 #define TTB_RGN_WT     (2 << 3)
 #define TTB_RGN_WB     (3 << 3)
 
-       .macro  cpsie, flags
-       .ifc \flags, f
-       .long   0xf1080040
-       .exitm
-       .endif
-       .ifc \flags, i
-       .long   0xf1080080
-       .exitm
-       .endif
-       .ifc \flags, if
-       .long   0xf10800c0
-       .exitm
-       .endif
-       .err
-       .endm
-
-       .macro  cpsid, flags
-       .ifc \flags, f
-       .long   0xf10c0040
-       .exitm
-       .endif
-       .ifc \flags, i
-       .long   0xf10c0080
-       .exitm
-       .endif
-       .ifc \flags, if
-       .long   0xf10c00c0
-       .exitm
-       .endif
-       .err
-       .endm
-
 ENTRY(cpu_v6_proc_init)
        mov     pc, lr
 
@@ -120,6 +89,7 @@ ENTRY(cpu_v6_dcache_clean_area)
  *     - we are not using split page tables
  */
 ENTRY(cpu_v6_switch_mm)
+#ifdef CONFIG_MMU
        mov     r2, #0
        ldr     r1, [r1, #MM_CONTEXT_ID]        @ get mm->context.id
 #ifdef CONFIG_SMP
@@ -129,6 +99,7 @@ ENTRY(cpu_v6_switch_mm)
        mcr     p15, 0, r2, c7, c10, 4          @ drain write buffer
        mcr     p15, 0, r0, c2, c0, 0           @ set TTB 0
        mcr     p15, 0, r1, c13, c0, 1          @ set context ID
+#endif
        mov     pc, lr
 
 /*
@@ -151,6 +122,7 @@ ENTRY(cpu_v6_switch_mm)
  *       1111   0   1   1      r/w     r/w
  */
 ENTRY(cpu_v6_set_pte)
+#ifdef CONFIG_MMU
        str     r1, [r0], #-2048                @ linux version
 
        bic     r2, r1, #0x000003f0
@@ -177,6 +149,7 @@ ENTRY(cpu_v6_set_pte)
 
        str     r2, [r0]
        mcr     p15, 0, r0, c7, c10, 1 @ flush_pte
+#endif
        mov     pc, lr
 
 
@@ -226,12 +199,14 @@ __v6_setup:
        mcr     p15, 0, r0, c7, c5, 0           @ invalidate I cache
        mcr     p15, 0, r0, c7, c15, 0          @ clean+invalidate cache
        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer
+#ifdef CONFIG_MMU
        mcr     p15, 0, r0, c8, c7, 0           @ invalidate I + D TLBs
        mcr     p15, 0, r0, c2, c0, 2           @ TTB control register
 #ifdef CONFIG_SMP
        orr     r4, r4, #TTB_RGN_WBWA|TTB_S     @ mark PTWs shared, outer cacheable
 #endif
        mcr     p15, 0, r4, c2, c0, 1           @ load TTB1
+#endif /* CONFIG_MMU */
 #ifdef CONFIG_VFP
        mrc     p15, 0, r0, c1, c0, 2
        orr     r0, r0, #(0xf << 20)