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

In noMMU mode, various of functions which are defined in mm/proc-*.S
is not valid or needed to be avoided. i.g. switch_mm is not needed,
just returns and this makes the I & D caches are valid which shows
great improvement of performance including task switching and IPC.

Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mm/proc-arm1020.S b/arch/arm/mm/proc-arm1020.S
index 9595888..b9abbaf 100644 (file)
--- a/arch/arm/mm/proc-arm1020.S
+++ b/arch/arm/mm/proc-arm1020.S
@@ -3,6 +3,7 @@
  *
  *  Copyright (C) 2000 ARM Limited
  *  Copyright (C) 2000 Deep Blue Solutions Ltd.
+ *  hacked for non-paged-MM by Hyok S. Choi, 2003.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -101,7 +102,9 @@ ENTRY(cpu_arm1020_reset)
        mov     ip, #0
        mcr     p15, 0, ip, c7, c7, 0           @ invalidate I,D caches
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
+#ifdef CONFIG_MMU
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mrc     p15, 0, ip, c1, c0, 0           @ ctrl register
        bic     ip, ip, #0x000f                 @ ............wcam
        bic     ip, ip, #0x1100                 @ ...i...s........
@@ -359,6 +362,7 @@ ENTRY(cpu_arm1020_dcache_clean_area)
  */
        .align  5
 ENTRY(cpu_arm1020_switch_mm)
+#ifdef CONFIG_MMU
 #ifndef CONFIG_CPU_DCACHE_DISABLE
        mcr     p15, 0, r3, c7, c10, 4
        mov     r1, #0xF                        @ 16 segments
@@ -383,6 +387,7 @@ ENTRY(cpu_arm1020_switch_mm)
        mcr     p15, 0, r1, c7, c10, 4          @ drain WB
        mcr     p15, 0, r0, c2, c0, 0           @ load page table pointer
        mcr     p15, 0, r1, c8, c7, 0           @ invalidate I & D TLBs
+#endif /* CONFIG_MMU */
        mov     pc, lr
         
 /*
@@ -392,6 +397,7 @@ ENTRY(cpu_arm1020_switch_mm)
  */
        .align  5
 ENTRY(cpu_arm1020_set_pte)
+#ifdef CONFIG_MMU
        str     r1, [r0], #-2048                @ linux version
 
        eor     r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
@@ -421,6 +427,7 @@ ENTRY(cpu_arm1020_set_pte)
        mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
 #endif
        mcr     p15, 0, r0, c7, c10, 4          @ drain WB
+#endif /* CONFIG_MMU */
        mov     pc, lr
 
        __INIT
@@ -430,7 +437,9 @@ __arm1020_setup:
        mov     r0, #0
        mcr     p15, 0, r0, c7, c7              @ invalidate I,D caches on v4
        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer on v4
+#ifdef CONFIG_MMU
        mcr     p15, 0, r0, c8, c7              @ invalidate I,D TLBs on v4
+#endif
        mrc     p15, 0, r0, c1, c0              @ get control register v4
        ldr     r5, arm1020_cr1_clear
        bic     r0, r0, r5

diff --git a/arch/arm/mm/proc-arm1020e.S b/arch/arm/mm/proc-arm1020e.S
index be6d081..bcd5ee0 100644 (file)
--- a/arch/arm/mm/proc-arm1020e.S
+++ b/arch/arm/mm/proc-arm1020e.S
@@ -3,6 +3,7 @@
  *
  *  Copyright (C) 2000 ARM Limited
  *  Copyright (C) 2000 Deep Blue Solutions Ltd.
+ *  hacked for non-paged-MM by Hyok S. Choi, 2003.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -101,7 +102,9 @@ ENTRY(cpu_arm1020e_reset)
        mov     ip, #0
        mcr     p15, 0, ip, c7, c7, 0           @ invalidate I,D caches
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
+#ifdef CONFIG_MMU
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mrc     p15, 0, ip, c1, c0, 0           @ ctrl register
        bic     ip, ip, #0x000f                 @ ............wcam
        bic     ip, ip, #0x1100                 @ ...i...s........
@@ -344,6 +347,7 @@ ENTRY(cpu_arm1020e_dcache_clean_area)
  */
        .align  5
 ENTRY(cpu_arm1020e_switch_mm)
+#ifdef CONFIG_MMU
 #ifndef CONFIG_CPU_DCACHE_DISABLE
        mcr     p15, 0, r3, c7, c10, 4
        mov     r1, #0xF                        @ 16 segments
@@ -367,6 +371,7 @@ ENTRY(cpu_arm1020e_switch_mm)
        mcr     p15, 0, r1, c7, c10, 4          @ drain WB
        mcr     p15, 0, r0, c2, c0, 0           @ load page table pointer
        mcr     p15, 0, r1, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mov     pc, lr
         
 /*
@@ -376,6 +381,7 @@ ENTRY(cpu_arm1020e_switch_mm)
  */
        .align  5
 ENTRY(cpu_arm1020e_set_pte)
+#ifdef CONFIG_MMU
        str     r1, [r0], #-2048                @ linux version
 
        eor     r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
@@ -403,6 +409,7 @@ ENTRY(cpu_arm1020e_set_pte)
 #ifndef CONFIG_CPU_DCACHE_DISABLE
        mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
 #endif
+#endif /* CONFIG_MMU */
        mov     pc, lr
 
        __INIT
@@ -412,7 +419,9 @@ __arm1020e_setup:
        mov     r0, #0
        mcr     p15, 0, r0, c7, c7              @ invalidate I,D caches on v4
        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer on v4
+#ifdef CONFIG_MMU
        mcr     p15, 0, r0, c8, c7              @ invalidate I,D TLBs on v4
+#endif
        mrc     p15, 0, r0, c1, c0              @ get control register v4
        ldr     r5, arm1020e_cr1_clear
        bic     r0, r0, r5

diff --git a/arch/arm/mm/proc-arm1022.S b/arch/arm/mm/proc-arm1022.S
index f778545..b0ccff4 100644 (file)
--- a/arch/arm/mm/proc-arm1022.S
+++ b/arch/arm/mm/proc-arm1022.S
@@ -3,6 +3,7 @@
  *
  *  Copyright (C) 2000 ARM Limited
  *  Copyright (C) 2000 Deep Blue Solutions Ltd.
+ *  hacked for non-paged-MM by Hyok S. Choi, 2003.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -90,7 +91,9 @@ ENTRY(cpu_arm1022_reset)
        mov     ip, #0
        mcr     p15, 0, ip, c7, c7, 0           @ invalidate I,D caches
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
+#ifdef CONFIG_MMU
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mrc     p15, 0, ip, c1, c0, 0           @ ctrl register
        bic     ip, ip, #0x000f                 @ ............wcam
        bic     ip, ip, #0x1100                 @ ...i...s........
@@ -333,6 +336,7 @@ ENTRY(cpu_arm1022_dcache_clean_area)
  */
        .align  5
 ENTRY(cpu_arm1022_switch_mm)
+#ifdef CONFIG_MMU
 #ifndef CONFIG_CPU_DCACHE_DISABLE
        mov     r1, #(CACHE_DSEGMENTS - 1) << 5 @ 16 segments
 1:     orr     r3, r1, #(CACHE_DENTRIES - 1) << 26 @ 64 entries
@@ -349,6 +353,7 @@ ENTRY(cpu_arm1022_switch_mm)
        mcr     p15, 0, r1, c7, c10, 4          @ drain WB
        mcr     p15, 0, r0, c2, c0, 0           @ load page table pointer
        mcr     p15, 0, r1, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mov     pc, lr
         
 /*
@@ -358,6 +363,7 @@ ENTRY(cpu_arm1022_switch_mm)
  */
        .align  5
 ENTRY(cpu_arm1022_set_pte)
+#ifdef CONFIG_MMU
        str     r1, [r0], #-2048                @ linux version
 
        eor     r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
@@ -385,6 +391,7 @@ ENTRY(cpu_arm1022_set_pte)
 #ifndef CONFIG_CPU_DCACHE_DISABLE
        mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
 #endif
+#endif /* CONFIG_MMU */
        mov     pc, lr
 
        __INIT
@@ -394,7 +401,9 @@ __arm1022_setup:
        mov     r0, #0
        mcr     p15, 0, r0, c7, c7              @ invalidate I,D caches on v4
        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer on v4
+#ifdef CONFIG_MMU
        mcr     p15, 0, r0, c8, c7              @ invalidate I,D TLBs on v4
+#endif
        mrc     p15, 0, r0, c1, c0              @ get control register v4
        ldr     r5, arm1022_cr1_clear
        bic     r0, r0, r5

diff --git a/arch/arm/mm/proc-arm1026.S b/arch/arm/mm/proc-arm1026.S
index 148c111..abe850c 100644 (file)
--- a/arch/arm/mm/proc-arm1026.S
+++ b/arch/arm/mm/proc-arm1026.S
@@ -3,6 +3,7 @@
  *
  *  Copyright (C) 2000 ARM Limited
  *  Copyright (C) 2000 Deep Blue Solutions Ltd.
+ *  hacked for non-paged-MM by Hyok S. Choi, 2003.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -90,7 +91,9 @@ ENTRY(cpu_arm1026_reset)
        mov     ip, #0
        mcr     p15, 0, ip, c7, c7, 0           @ invalidate I,D caches
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
+#ifdef CONFIG_MMU
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mrc     p15, 0, ip, c1, c0, 0           @ ctrl register
        bic     ip, ip, #0x000f                 @ ............wcam
        bic     ip, ip, #0x1100                 @ ...i...s........
@@ -327,6 +330,7 @@ ENTRY(cpu_arm1026_dcache_clean_area)
  */
        .align  5
 ENTRY(cpu_arm1026_switch_mm)
+#ifdef CONFIG_MMU
        mov     r1, #0
 #ifndef CONFIG_CPU_DCACHE_DISABLE
 1:     mrc     p15, 0, r15, c7, c14, 3         @ test, clean, invalidate
@@ -338,6 +342,7 @@ ENTRY(cpu_arm1026_switch_mm)
        mcr     p15, 0, r1, c7, c10, 4          @ drain WB
        mcr     p15, 0, r0, c2, c0, 0           @ load page table pointer
        mcr     p15, 0, r1, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mov     pc, lr
         
 /*
@@ -347,6 +352,7 @@ ENTRY(cpu_arm1026_switch_mm)
  */
        .align  5
 ENTRY(cpu_arm1026_set_pte)
+#ifdef CONFIG_MMU
        str     r1, [r0], #-2048                @ linux version
 
        eor     r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
@@ -374,6 +380,7 @@ ENTRY(cpu_arm1026_set_pte)
 #ifndef CONFIG_CPU_DCACHE_DISABLE
        mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
 #endif
+#endif /* CONFIG_MMU */
        mov     pc, lr
 
 
@@ -384,8 +391,10 @@ __arm1026_setup:
        mov     r0, #0
        mcr     p15, 0, r0, c7, c7              @ invalidate I,D caches on v4
        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer on v4
+#ifdef CONFIG_MMU
        mcr     p15, 0, r0, c8, c7              @ invalidate I,D TLBs on v4
        mcr     p15, 0, r4, c2, c0              @ load page table pointer
+#endif
 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
        mov     r0, #4                          @ explicitly disable writeback
        mcr     p15, 7, r0, c15, c0, 0

diff --git a/arch/arm/mm/proc-arm6_7.S b/arch/arm/mm/proc-arm6_7.S
index 540359b..7a705ed 100644 (file)
--- a/arch/arm/mm/proc-arm6_7.S
+++ b/arch/arm/mm/proc-arm6_7.S
@@ -2,6 +2,7 @@
  *  linux/arch/arm/mm/proc-arm6,7.S
  *
  *  Copyright (C) 1997-2000 Russell King
+ *  hacked for non-paged-MM by Hyok S. Choi, 2003.
  *
  * 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
@@ -199,10 +200,12 @@ ENTRY(cpu_arm7_do_idle)
  */
 ENTRY(cpu_arm6_switch_mm)
 ENTRY(cpu_arm7_switch_mm)
+#ifdef CONFIG_MMU
                mov     r1, #0
                mcr     p15, 0, r1, c7, c0, 0           @ flush cache
                mcr     p15, 0, r0, c2, c0, 0           @ update page table ptr
                mcr     p15, 0, r1, c5, c0, 0           @ flush TLBs
+#endif
                mov     pc, lr
 
 /*
@@ -214,6 +217,7 @@ ENTRY(cpu_arm7_switch_mm)
                .align  5
 ENTRY(cpu_arm6_set_pte)
 ENTRY(cpu_arm7_set_pte)
+#ifdef CONFIG_MMU
                str     r1, [r0], #-2048                @ linux version
 
                eor     r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
@@ -232,6 +236,7 @@ ENTRY(cpu_arm7_set_pte)
                movne   r2, #0
 
                str     r2, [r0]                        @ hardware version
+#endif /* CONFIG_MMU */
                mov     pc, lr
 
 /*
@@ -243,7 +248,9 @@ ENTRY(cpu_arm6_reset)
 ENTRY(cpu_arm7_reset)
                mov     r1, #0
                mcr     p15, 0, r1, c7, c0, 0           @ flush cache
+#ifdef CONFIG_MMU
                mcr     p15, 0, r1, c5, c0, 0           @ flush TLB
+#endif
                mov     r1, #0x30
                mcr     p15, 0, r1, c1, c0, 0           @ turn off MMU etc
                mov     pc, r0
@@ -253,19 +260,27 @@ ENTRY(cpu_arm7_reset)
                .type   __arm6_setup, #function
 __arm6_setup:  mov     r0, #0
                mcr     p15, 0, r0, c7, c0              @ flush caches on v3
+#ifdef CONFIG_MMU
                mcr     p15, 0, r0, c5, c0              @ flush TLBs on v3
                mov     r0, #0x3d                       @ . ..RS BLDP WCAM
                orr     r0, r0, #0x100                  @ . ..01 0011 1101
+#else
+               mov     r0, #0x3c                       @ . ..RS BLDP WCA.
+#endif
                mov     pc, lr
                .size   __arm6_setup, . - __arm6_setup
 
                .type   __arm7_setup, #function
 __arm7_setup:  mov     r0, #0
                mcr     p15, 0, r0, c7, c0              @ flush caches on v3
+#ifdef CONFIG_MMU
                mcr     p15, 0, r0, c5, c0              @ flush TLBs on v3
                mcr     p15, 0, r0, c3, c0              @ load domain access register
                mov     r0, #0x7d                       @ . ..RS BLDP WCAM
                orr     r0, r0, #0x100                  @ . ..01 0111 1101
+#else
+               mov     r0, #0x7c                       @ . ..RS BLDP WCA.
+#endif
                mov     pc, lr
                .size   __arm7_setup, . - __arm7_setup
 

diff --git a/arch/arm/mm/proc-arm720.S b/arch/arm/mm/proc-arm720.S
index 26f00ee..8610246 100644 (file)
--- a/arch/arm/mm/proc-arm720.S
+++ b/arch/arm/mm/proc-arm720.S
@@ -4,6 +4,7 @@
  *  Copyright (C) 2000 Steve Hill (sjhill@cotw.com)
  *                     Rob Scott (rscott@mtrob.fdns.net)
  *  Copyright (C) 2000 ARM Limited, Deep Blue Solutions Ltd.
+ *  hacked for non-paged-MM by Hyok S. Choi, 2004.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -29,6 +30,7 @@
  *                     out of 'proc-arm6,7.S' per RMK discussion
  *   07-25-2000 SJH    Added idle function.
  *   08-25-2000        DBS     Updated for integration of ARM Ltd version.
+ *   04-20-2004 HSC    modified for non-paged memory management mode.
  */
 #include <linux/linkage.h>
 #include <linux/init.h>
@@ -75,10 +77,12 @@ ENTRY(cpu_arm720_do_idle)
  *          the new.
  */
 ENTRY(cpu_arm720_switch_mm)
+#ifdef CONFIG_MMU
                mov     r1, #0
                mcr     p15, 0, r1, c7, c7, 0           @ invalidate cache
                mcr     p15, 0, r0, c2, c0, 0           @ update page table ptr
                mcr     p15, 0, r1, c8, c7, 0           @ flush TLB (v4)
+#endif
                mov     pc, lr
 
 /*
@@ -89,6 +93,7 @@ ENTRY(cpu_arm720_switch_mm)
  */
                .align  5
 ENTRY(cpu_arm720_set_pte)
+#ifdef CONFIG_MMU
                str     r1, [r0], #-2048                @ linux version
 
                eor     r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
@@ -107,6 +112,7 @@ ENTRY(cpu_arm720_set_pte)
                movne   r2, #0
 
                str     r2, [r0]                        @ hardware version
+#endif
                mov     pc, lr
 
 /*
@@ -117,7 +123,9 @@ ENTRY(cpu_arm720_set_pte)
 ENTRY(cpu_arm720_reset)
                mov     ip, #0
                mcr     p15, 0, ip, c7, c7, 0           @ invalidate cache
+#ifdef CONFIG_MMU
                mcr     p15, 0, ip, c8, c7, 0           @ flush TLB (v4)
+#endif
                mrc     p15, 0, ip, c1, c0, 0           @ get ctrl register
                bic     ip, ip, #0x000f                 @ ............wcam
                bic     ip, ip, #0x2100                 @ ..v....s........
@@ -130,7 +138,9 @@ ENTRY(cpu_arm720_reset)
 __arm710_setup:
        mov     r0, #0
        mcr     p15, 0, r0, c7, c7, 0           @ invalidate caches
+#ifdef CONFIG_MMU
        mcr     p15, 0, r0, c8, c7, 0           @ flush TLB (v4)
+#endif
        mrc     p15, 0, r0, c1, c0              @ get control register
        ldr     r5, arm710_cr1_clear
        bic     r0, r0, r5
@@ -156,7 +166,9 @@ arm710_cr1_set:
 __arm720_setup:
        mov     r0, #0
        mcr     p15, 0, r0, c7, c7, 0           @ invalidate caches
+#ifdef CONFIG_MMU
        mcr     p15, 0, r0, c8, c7, 0           @ flush TLB (v4)
+#endif
        mrc     p15, 0, r0, c1, c0              @ get control register
        ldr     r5, arm720_cr1_clear
        bic     r0, r0, r5

diff --git a/arch/arm/mm/proc-arm920.S b/arch/arm/mm/proc-arm920.S
index a17f79e..31dc839 100644 (file)
--- a/arch/arm/mm/proc-arm920.S
+++ b/arch/arm/mm/proc-arm920.S
@@ -3,6 +3,7 @@
  *
  *  Copyright (C) 1999,2000 ARM Limited
  *  Copyright (C) 2000 Deep Blue Solutions Ltd.
+ *  hacked for non-paged-MM by Hyok S. Choi, 2003.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -97,7 +98,9 @@ ENTRY(cpu_arm920_reset)
        mov     ip, #0
        mcr     p15, 0, ip, c7, c7, 0           @ invalidate I,D caches
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
+#ifdef CONFIG_MMU
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mrc     p15, 0, ip, c1, c0, 0           @ ctrl register
        bic     ip, ip, #0x000f                 @ ............wcam
        bic     ip, ip, #0x1100                 @ ...i...s........
@@ -317,6 +320,7 @@ ENTRY(cpu_arm920_dcache_clean_area)
  */
        .align  5
 ENTRY(cpu_arm920_switch_mm)
+#ifdef CONFIG_MMU
        mov     ip, #0
 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
        mcr     p15, 0, ip, c7, c6, 0           @ invalidate D cache
@@ -337,6 +341,7 @@ ENTRY(cpu_arm920_switch_mm)
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
        mcr     p15, 0, r0, c2, c0, 0           @ load page table pointer
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mov     pc, lr
 
 /*
@@ -346,6 +351,7 @@ ENTRY(cpu_arm920_switch_mm)
  */
        .align  5
 ENTRY(cpu_arm920_set_pte)
+#ifdef CONFIG_MMU
        str     r1, [r0], #-2048                @ linux version
 
        eor     r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
@@ -372,6 +378,7 @@ ENTRY(cpu_arm920_set_pte)
        mov     r0, r0
        mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
        mcr     p15, 0, r0, c7, c10, 4          @ drain WB
+#endif /* CONFIG_MMU */
        mov     pc, lr
 
        __INIT
@@ -381,7 +388,9 @@ __arm920_setup:
        mov     r0, #0
        mcr     p15, 0, r0, c7, c7              @ invalidate I,D caches on v4
        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer on v4
+#ifdef CONFIG_MMU
        mcr     p15, 0, r0, c8, c7              @ invalidate I,D TLBs on v4
+#endif
        mrc     p15, 0, r0, c1, c0              @ get control register v4
        ldr     r5, arm920_cr1_clear
        bic     r0, r0, r5

diff --git a/arch/arm/mm/proc-arm922.S b/arch/arm/mm/proc-arm922.S
index bbde4a0..9e57c34 100644 (file)
--- a/arch/arm/mm/proc-arm922.S
+++ b/arch/arm/mm/proc-arm922.S
@@ -4,6 +4,7 @@
  *  Copyright (C) 1999,2000 ARM Limited
  *  Copyright (C) 2000 Deep Blue Solutions Ltd.
  *  Copyright (C) 2001 Altera Corporation
+ *  hacked for non-paged-MM by Hyok S. Choi, 2003.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -99,7 +100,9 @@ ENTRY(cpu_arm922_reset)
        mov     ip, #0
        mcr     p15, 0, ip, c7, c7, 0           @ invalidate I,D caches
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
+#ifdef CONFIG_MMU
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mrc     p15, 0, ip, c1, c0, 0           @ ctrl register
        bic     ip, ip, #0x000f                 @ ............wcam
        bic     ip, ip, #0x1100                 @ ...i...s........
@@ -321,6 +324,7 @@ ENTRY(cpu_arm922_dcache_clean_area)
  */
        .align  5
 ENTRY(cpu_arm922_switch_mm)
+#ifdef CONFIG_MMU
        mov     ip, #0
 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
        mcr     p15, 0, ip, c7, c6, 0           @ invalidate D cache
@@ -341,6 +345,7 @@ ENTRY(cpu_arm922_switch_mm)
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
        mcr     p15, 0, r0, c2, c0, 0           @ load page table pointer
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mov     pc, lr
 
 /*
@@ -350,6 +355,7 @@ ENTRY(cpu_arm922_switch_mm)
  */
        .align  5
 ENTRY(cpu_arm922_set_pte)
+#ifdef CONFIG_MMU
        str     r1, [r0], #-2048                @ linux version
 
        eor     r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
@@ -376,6 +382,7 @@ ENTRY(cpu_arm922_set_pte)
        mov     r0, r0
        mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
        mcr     p15, 0, r0, c7, c10, 4          @ drain WB
+#endif /* CONFIG_MMU */
        mov     pc, lr
 
        __INIT
@@ -385,7 +392,9 @@ __arm922_setup:
        mov     r0, #0
        mcr     p15, 0, r0, c7, c7              @ invalidate I,D caches on v4
        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer on v4
+#ifdef CONFIG_MMU
        mcr     p15, 0, r0, c8, c7              @ invalidate I,D TLBs on v4
+#endif
        mrc     p15, 0, r0, c1, c0              @ get control register v4
        ldr     r5, arm922_cr1_clear
        bic     r0, r0, r5

diff --git a/arch/arm/mm/proc-arm925.S b/arch/arm/mm/proc-arm925.S
index 224ce22..8d47c9f 100644 (file)
--- a/arch/arm/mm/proc-arm925.S
+++ b/arch/arm/mm/proc-arm925.S
@@ -9,6 +9,8 @@
  *  Update for Linux-2.6 and cache flush improvements
  *  Copyright (C) 2004 Nokia Corporation by Tony Lindgren <tony@atomide.com>
  *
+ *  hacked for non-paged-MM by Hyok S. Choi, 2004.
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
@@ -122,7 +124,9 @@ ENTRY(cpu_arm925_reset)
        mov     ip, #0
        mcr     p15, 0, ip, c7, c7, 0           @ invalidate I,D caches
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
+#ifdef CONFIG_MMU
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mrc     p15, 0, ip, c1, c0, 0           @ ctrl register
        bic     ip, ip, #0x000f                 @ ............wcam
        bic     ip, ip, #0x1100                 @ ...i...s........
@@ -369,6 +373,7 @@ ENTRY(cpu_arm925_dcache_clean_area)
  */
        .align  5
 ENTRY(cpu_arm925_switch_mm)
+#ifdef CONFIG_MMU
        mov     ip, #0
 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
        mcr     p15, 0, ip, c7, c6, 0           @ invalidate D cache
@@ -383,6 +388,7 @@ ENTRY(cpu_arm925_switch_mm)
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
        mcr     p15, 0, r0, c2, c0, 0           @ load page table pointer
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mov     pc, lr
 
 /*
@@ -392,6 +398,7 @@ ENTRY(cpu_arm925_switch_mm)
  */
        .align  5
 ENTRY(cpu_arm925_set_pte)
+#ifdef CONFIG_MMU
        str     r1, [r0], #-2048                @ linux version
 
        eor     r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
@@ -420,6 +427,7 @@ ENTRY(cpu_arm925_set_pte)
        mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
 #endif
        mcr     p15, 0, r0, c7, c10, 4          @ drain WB
+#endif /* CONFIG_MMU */
        mov     pc, lr
 
        __INIT
@@ -438,7 +446,9 @@ __arm925_setup:
        mov     r0, #0
        mcr     p15, 0, r0, c7, c7              @ invalidate I,D caches on v4
        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer on v4
+#ifdef CONFIG_MMU
        mcr     p15, 0, r0, c8, c7              @ invalidate I,D TLBs on v4
+#endif
 
 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
        mov     r0, #4                          @ disable write-back on caches explicitly

diff --git a/arch/arm/mm/proc-arm926.S b/arch/arm/mm/proc-arm926.S
index 4e2a087..cb4d8f3 100644 (file)
--- a/arch/arm/mm/proc-arm926.S
+++ b/arch/arm/mm/proc-arm926.S
@@ -3,6 +3,7 @@
  *
  *  Copyright (C) 1999-2001 ARM Limited
  *  Copyright (C) 2000 Deep Blue Solutions Ltd.
+ *  hacked for non-paged-MM by Hyok S. Choi, 2003.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -85,7 +86,9 @@ ENTRY(cpu_arm926_reset)
        mov     ip, #0
        mcr     p15, 0, ip, c7, c7, 0           @ invalidate I,D caches
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
+#ifdef CONFIG_MMU
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mrc     p15, 0, ip, c1, c0, 0           @ ctrl register
        bic     ip, ip, #0x000f                 @ ............wcam
        bic     ip, ip, #0x1100                 @ ...i...s........
@@ -329,6 +332,7 @@ ENTRY(cpu_arm926_dcache_clean_area)
  */
        .align  5
 ENTRY(cpu_arm926_switch_mm)
+#ifdef CONFIG_MMU
        mov     ip, #0
 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
        mcr     p15, 0, ip, c7, c6, 0           @ invalidate D cache
@@ -341,6 +345,7 @@ ENTRY(cpu_arm926_switch_mm)
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
        mcr     p15, 0, r0, c2, c0, 0           @ load page table pointer
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mov     pc, lr
 
 /*
@@ -350,6 +355,7 @@ ENTRY(cpu_arm926_switch_mm)
  */
        .align  5
 ENTRY(cpu_arm926_set_pte)
+#ifdef CONFIG_MMU
        str     r1, [r0], #-2048                @ linux version
 
        eor     r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
@@ -378,6 +384,7 @@ ENTRY(cpu_arm926_set_pte)
        mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
 #endif
        mcr     p15, 0, r0, c7, c10, 4          @ drain WB
+#endif
        mov     pc, lr
 
        __INIT
@@ -387,7 +394,9 @@ __arm926_setup:
        mov     r0, #0
        mcr     p15, 0, r0, c7, c7              @ invalidate I,D caches on v4
        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer on v4
+#ifdef CONFIG_MMU
        mcr     p15, 0, r0, c8, c7              @ invalidate I,D TLBs on v4
+#endif
 
 
 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH

diff --git a/arch/arm/mm/proc-sa110.S b/arch/arm/mm/proc-sa110.S
index a2dd5ae..5a760a2 100644 (file)
--- a/arch/arm/mm/proc-sa110.S
+++ b/arch/arm/mm/proc-sa110.S
@@ -2,6 +2,7 @@
  *  linux/arch/arm/mm/proc-sa110.S
  *
  *  Copyright (C) 1997-2002 Russell King
+ *  hacked for non-paged-MM by Hyok S. Choi, 2003.
  *
  * 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
@@ -67,7 +68,9 @@ ENTRY(cpu_sa110_reset)
        mov     ip, #0
        mcr     p15, 0, ip, c7, c7, 0           @ invalidate I,D caches
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
+#ifdef CONFIG_MMU
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mrc     p15, 0, ip, c1, c0, 0           @ ctrl register
        bic     ip, ip, #0x000f                 @ ............wcam
        bic     ip, ip, #0x1100                 @ ...i...s........
@@ -130,11 +133,15 @@ ENTRY(cpu_sa110_dcache_clean_area)
  */
        .align  5
 ENTRY(cpu_sa110_switch_mm)
+#ifdef CONFIG_MMU
        str     lr, [sp, #-4]!
        bl      v4wb_flush_kern_cache_all       @ clears IP
        mcr     p15, 0, r0, c2, c0, 0           @ load page table pointer
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
        ldr     pc, [sp], #4
+#else
+       mov     pc, lr
+#endif
 
 /*
  * cpu_sa110_set_pte(ptep, pte)
@@ -143,6 +150,7 @@ ENTRY(cpu_sa110_switch_mm)
  */
        .align  5
 ENTRY(cpu_sa110_set_pte)
+#ifdef CONFIG_MMU
        str     r1, [r0], #-2048                @ linux version
 
        eor     r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
@@ -164,6 +172,7 @@ ENTRY(cpu_sa110_set_pte)
        mov     r0, r0
        mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
        mcr     p15, 0, r0, c7, c10, 4          @ drain WB
+#endif
        mov     pc, lr
 
        __INIT
@@ -173,7 +182,9 @@ __sa110_setup:
        mov     r10, #0
        mcr     p15, 0, r10, c7, c7             @ invalidate I,D caches on v4
        mcr     p15, 0, r10, c7, c10, 4         @ drain write buffer on v4
+#ifdef CONFIG_MMU
        mcr     p15, 0, r10, c8, c7             @ invalidate I,D TLBs on v4
+#endif
        mrc     p15, 0, r0, c1, c0              @ get control register v4
        ldr     r5, sa110_cr1_clear
        bic     r0, r0, r5

diff --git a/arch/arm/mm/proc-sa1100.S b/arch/arm/mm/proc-sa1100.S
index 777ad99..0a2107a 100644 (file)
--- a/arch/arm/mm/proc-sa1100.S
+++ b/arch/arm/mm/proc-sa1100.S
@@ -2,6 +2,7 @@
  *  linux/arch/arm/mm/proc-sa1100.S
  *
  *  Copyright (C) 1997-2002 Russell King
+ *  hacked for non-paged-MM by Hyok S. Choi, 2003.
  *
  * 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
@@ -77,7 +78,9 @@ ENTRY(cpu_sa1100_reset)
        mov     ip, #0
        mcr     p15, 0, ip, c7, c7, 0           @ invalidate I,D caches
        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
+#ifdef CONFIG_MMU
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
        mrc     p15, 0, ip, c1, c0, 0           @ ctrl register
        bic     ip, ip, #0x000f                 @ ............wcam
        bic     ip, ip, #0x1100                 @ ...i...s........
@@ -142,12 +145,16 @@ ENTRY(cpu_sa1100_dcache_clean_area)
  */
        .align  5
 ENTRY(cpu_sa1100_switch_mm)
+#ifdef CONFIG_MMU
        str     lr, [sp, #-4]!
        bl      v4wb_flush_kern_cache_all       @ clears IP
        mcr     p15, 0, ip, c9, c0, 0           @ invalidate RB
        mcr     p15, 0, r0, c2, c0, 0           @ load page table pointer
        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
        ldr     pc, [sp], #4
+#else
+       mov     pc, lr
+#endif
 
 /*
  * cpu_sa1100_set_pte(ptep, pte)
@@ -156,6 +163,7 @@ ENTRY(cpu_sa1100_switch_mm)
  */
        .align  5
 ENTRY(cpu_sa1100_set_pte)
+#ifdef CONFIG_MMU
        str     r1, [r0], #-2048                @ linux version
 
        eor     r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
@@ -177,6 +185,7 @@ ENTRY(cpu_sa1100_set_pte)
        mov     r0, r0
        mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
        mcr     p15, 0, r0, c7, c10, 4          @ drain WB
+#endif
        mov     pc, lr
 
        __INIT
@@ -186,7 +195,9 @@ __sa1100_setup:
        mov     r0, #0
        mcr     p15, 0, r0, c7, c7              @ invalidate I,D caches on v4
        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer on v4
+#ifdef CONFIG_MMU
        mcr     p15, 0, r0, c8, c7              @ invalidate I,D TLBs on v4
+#endif
        mrc     p15, 0, r0, c1, c0              @ get control register v4
        ldr     r5, sa1100_cr1_clear
        bic     r0, r0, r5

diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S
index 09b1a41..ca13d4d 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
@@ -88,6 +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
@@ -97,6 +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
 
 /*
@@ -119,6 +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
@@ -145,6 +149,7 @@ ENTRY(cpu_v6_set_pte)
 
        str     r2, [r0]
        mcr     p15, 0, r0, c7, c10, 1 @ flush_pte
+#endif
        mov     pc, lr
 
 
@@ -194,12 +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)