Merge branch 'master' of /home/trondmy/kernel/linux-2.6/

24 files changed, 444 insertions, 139 deletions

diff --git a/include/asm-arm/arch-at91rm9200/memory.h b/include/asm-arm/arch-at91rm9200/memory.h
index 3c327c404373..f985069e6d01 100644
--- a/include/asm-arm/arch-at91rm9200/memory.h
+++ b/include/asm-arm/arch-at91rm9200/memory.h
@@ -33,9 +33,7 @@
  * bus_to_virt: Used to convert an address for DMA operations
  *              to an address that the kernel can use.
  */
-#define __virt_to_bus__is_a_macro
 #define __virt_to_bus(x) __virt_to_phys(x)
-#define __bus_to_virt__is_a_macro
 #define __bus_to_virt(x) __phys_to_virt(x)
 
 #endif
diff --git a/include/asm-arm/arch-h720x/memory.h b/include/asm-arm/arch-h720x/memory.h
index 4a1bfd78a0fe..53e923dba76e 100644
--- a/include/asm-arm/arch-h720x/memory.h
+++ b/include/asm-arm/arch-h720x/memory.h
@@ -23,9 +23,7 @@
  * There is something to do here later !, Mar 2000, Jungjun Kim
  */
 
-#define __virt_to_bus__is_a_macro
 #define __virt_to_bus(x)        __virt_to_phys(x)
-#define __bus_to_virt__is_a_macro
 #define __bus_to_virt(x)        __phys_to_virt(x)
 
 #endif
diff --git a/include/asm-arm/arch-imx/memory.h b/include/asm-arm/arch-imx/memory.h
index d09ae32cd2f4..5ad90127915f 100644
--- a/include/asm-arm/arch-imx/memory.h
+++ b/include/asm-arm/arch-imx/memory.h
@@ -30,9 +30,7 @@
  * bus_to_virt: Used to convert an address for DMA operations
  *              to an address that the kernel can use.
  */
-#define __virt_to_bus__is_a_macro
-#define __virt_to_bus(x)        (x - PAGE_OFFSET +  PHYS_OFFSET)
-#define __bus_to_virt__is_a_macro
-#define __bus_to_virt(x)        (x -  PHYS_OFFSET + PAGE_OFFSET)
+#define __virt_to_bus(x)        (x - PAGE_OFFSET + PHYS_OFFSET)
+#define __bus_to_virt(x)        (x - PHYS_OFFSET + PAGE_OFFSET)
 
 #endif
diff --git a/include/asm-arm/arch-ixp23xx/ixp23xx.h b/include/asm-arm/arch-ixp23xx/ixp23xx.h
index d0a72201ee96..3927b1d61b17 100644
--- a/include/asm-arm/arch-ixp23xx/ixp23xx.h
+++ b/include/asm-arm/arch-ixp23xx/ixp23xx.h
@@ -295,15 +295,4 @@
 #define IXP23XX_PCI_CPP_ADDR_BITS       IXP23XX_PCI_CSR(0x0160)
 
 
-#ifndef __ASSEMBLY__
-/*
- * Is system memory on the XSI or CPP bus?
- */
-static inline unsigned ixp23xx_cpp_boot(void)
-{
-        return (*IXP23XX_EXP_CFG0 & IXP23XX_EXP_CFG0_XSI_NOT_PRES);
-}
-#endif
-
-
 #endif
diff --git a/include/asm-arm/arch-ixp23xx/platform.h b/include/asm-arm/arch-ixp23xx/platform.h
index 19a73b39c864..56e16d66645a 100644
--- a/include/asm-arm/arch-ixp23xx/platform.h
+++ b/include/asm-arm/arch-ixp23xx/platform.h
@@ -43,5 +43,15 @@ extern struct sys_timer ixp23xx_timer;
 
 #define IXP23XX_UART_XTAL               14745600
 
+#ifndef __ASSEMBLY__
+/*
+ * Is system memory on the XSI or CPP bus?
+ */
+static inline unsigned ixp23xx_cpp_boot(void)
+{
+        return (*IXP23XX_EXP_CFG0 & IXP23XX_EXP_CFG0_XSI_NOT_PRES);
+}
+#endif
+
 
 #endif
diff --git a/include/asm-arm/arch-ixp23xx/uncompress.h b/include/asm-arm/arch-ixp23xx/uncompress.h
index 013575e6a9a1..16c1110f2304 100644
--- a/include/asm-arm/arch-ixp23xx/uncompress.h
+++ b/include/asm-arm/arch-ixp23xx/uncompress.h
@@ -11,7 +11,7 @@
 #ifndef __ASM_ARCH_UNCOMPRESS_H
 #define __ASM_ARCH_UNCOMPRESS_H
 
-#include <asm/hardware.h>
+#include <asm/arch/ixp23xx.h>
 #include <linux/serial_reg.h>
 
 #define UART_BASE       ((volatile u32 *)IXP23XX_UART1_PHYS)
diff --git a/include/asm-arm/arch-s3c2410/regs-dsc.h b/include/asm-arm/arch-s3c2410/regs-dsc.h
index 84aca61cbaa3..a0a124875164 100644
--- a/include/asm-arm/arch-s3c2410/regs-dsc.h
+++ b/include/asm-arm/arch-s3c2410/regs-dsc.h
@@ -7,25 +7,23 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
- * S3C2440 Signal Drive Strength Control
- *
- *  Changelog:
- *    11-Aug-2004     BJD     Created file
- *    25-Aug-2004     BJD     Added the _SELECT_* defs for using with functions
+ * S3C2440/S3C2412 Signal Drive Strength Control
 */
 
 
 #ifndef __ASM_ARCH_REGS_DSC_H
 #define __ASM_ARCH_REGS_DSC_H "2440-dsc"
 
-#ifdef CONFIG_CPU_S3C2440
+#if defined(CONFIG_CPU_S3C2412)
+#define S3C2412_DSC0       S3C2410_GPIOREG(0xdc)
+#define S3C2412_DSC1       S3C2410_GPIOREG(0xe0)
+#endif
+
+#if defined(CONFIG_CPU_S3C2440)
 
 #define S3C2440_DSC0       S3C2410_GPIOREG(0xc4)
 #define S3C2440_DSC1       S3C2410_GPIOREG(0xc8)
 
-#define S3C2412_DSC0       S3C2410_GPIOREG(0xdc)
-#define S3C2412_DSC1       S3C2410_GPIOREG(0xe0)
-
 #define S3C2440_SELECT_DSC0 (0)
 #define S3C2440_SELECT_DSC1 (1<<31)
 
diff --git a/include/asm-arm/bugs.h b/include/asm-arm/bugs.h
index 4c80ec519d45..ca54eb0f12d7 100644
--- a/include/asm-arm/bugs.h
+++ b/include/asm-arm/bugs.h
@@ -10,8 +10,12 @@
 #ifndef __ASM_BUGS_H
 #define __ASM_BUGS_H
 
+#ifdef CONFIG_MMU
 extern void check_writebuffer_bugs(void);
 
 #define check_bugs() check_writebuffer_bugs()
+#else
+#define check_bugs() do { } while (0)
+#endif
 
 #endif
diff --git a/include/asm-arm/domain.h b/include/asm-arm/domain.h
index f8ea2de4848e..4c2885abbe6c 100644
--- a/include/asm-arm/domain.h
+++ b/include/asm-arm/domain.h
@@ -50,6 +50,8 @@
 #define domain_val(dom,type)    ((type) << (2*(dom)))
 
 #ifndef __ASSEMBLY__
+
+#ifdef CONFIG_MMU
 #define set_domain(x)                                   \
         do {                                            \
         __asm__ __volatile__(                           \
@@ -66,5 +68,10 @@
         set_domain(thread->cpu_domain);                         \
         } while (0)
 
+#else
+#define set_domain(x)           do { } while (0)
+#define modify_domain(dom,type) do { } while (0)
+#endif
+
 #endif
 #endif /* !__ASSEMBLY__ */
diff --git a/include/asm-arm/fpstate.h b/include/asm-arm/fpstate.h
index 132c3c5628b2..6af4e6bd1290 100644
--- a/include/asm-arm/fpstate.h
+++ b/include/asm-arm/fpstate.h
@@ -72,6 +72,14 @@ union fp_state {
 
 #define FP_SIZE (sizeof(union fp_state) / sizeof(int))
 
+struct crunch_state {
+        unsigned int    mvdx[16][2];
+        unsigned int    mvax[4][3];
+        unsigned int    dspsc[2];
+};
+
+#define CRUNCH_SIZE     sizeof(struct crunch_state)
+
 #endif
 
 #endif
diff --git a/include/asm-arm/mach/map.h b/include/asm-arm/mach/map.h
index e8ea67c97c73..cef5364ed5fe 100644
--- a/include/asm-arm/mach/map.h
+++ b/include/asm-arm/mach/map.h
@@ -16,8 +16,6 @@ struct map_desc {
         unsigned int type;
 };
 
-struct meminfo;
-
 #define MT_DEVICE               0
 #define MT_CACHECLEAN           1
 #define MT_MINICLEAN            2
@@ -28,7 +26,8 @@ struct meminfo;
 #define MT_IXP2000_DEVICE       7
 #define MT_NONSHARED_DEVICE     8
 
-extern void create_memmap_holes(struct meminfo *);
-extern void memtable_init(struct meminfo *);
+#ifdef CONFIG_MMU
 extern void iotable_init(struct map_desc *, int);
-extern void setup_io_desc(void);
+#else
+#define iotable_init(map,num)   do { } while (0)
+#endif
diff --git a/include/asm-arm/memory.h b/include/asm-arm/memory.h
index 731e321a57d1..94f973b704f1 100644
--- a/include/asm-arm/memory.h
+++ b/include/asm-arm/memory.h
@@ -2,6 +2,7 @@
  *  linux/include/asm-arm/memory.h
  *
  *  Copyright (C) 2000-2002 Russell King
+ *  modification for nommu, 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 version 2 as
@@ -26,6 +27,8 @@
 #include <asm/arch/memory.h>
 #include <asm/sizes.h>
 
+#ifdef CONFIG_MMU
+
 #ifndef TASK_SIZE
 /*
  * TASK_SIZE - the maximum size of a user space task.
@@ -48,6 +51,60 @@
 #endif
 
 /*
+ * The module space lives between the addresses given by TASK_SIZE
+ * and PAGE_OFFSET - it must be within 32MB of the kernel text.
+ */
+#define MODULE_END              (PAGE_OFFSET)
+#define MODULE_START            (MODULE_END - 16*1048576)
+
+#if TASK_SIZE > MODULE_START
+#error Top of user space clashes with start of module space
+#endif
+
+/*
+ * The XIP kernel gets mapped at the bottom of the module vm area.
+ * Since we use sections to map it, this macro replaces the physical address
+ * with its virtual address while keeping offset from the base section.
+ */
+#define XIP_VIRT_ADDR(physaddr)  (MODULE_START + ((physaddr) & 0x000fffff))
+
+#else /* CONFIG_MMU */
+
+/*
+ * The limitation of user task size can grow up to the end of free ram region.
+ * It is difficult to define and perhaps will never meet the original meaning
+ * of this define that was meant to.
+ * Fortunately, there is no reference for this in noMMU mode, for now.
+ */
+#ifndef TASK_SIZE
+#define TASK_SIZE               (CONFIG_DRAM_SIZE)
+#endif
+
+#ifndef TASK_UNMAPPED_BASE
+#define TASK_UNMAPPED_BASE      UL(0x00000000)
+#endif
+
+#ifndef PHYS_OFFSET
+#define PHYS_OFFSET             (CONFIG_DRAM_BASE)
+#endif
+
+#ifndef END_MEM
+#define END_MEM                 (CONFIG_DRAM_BASE + CONFIG_DRAM_SIZE)
+#endif
+
+#ifndef PAGE_OFFSET
+#define PAGE_OFFSET             (PHYS_OFFSET)
+#endif
+
+/*
+ * The module can be at any place in ram in nommu mode.
+ */
+#define MODULE_END              (END_MEM)
+#define MODULE_START            (PHYS_OFFSET)
+
+#endif /* !CONFIG_MMU */
+
+/*
  * Size of DMA-consistent memory region.  Must be multiple of 2M,
  * between 2MB and 14MB inclusive.
  */
@@ -71,24 +128,6 @@
 #define __phys_to_pfn(paddr)    ((paddr) >> PAGE_SHIFT)
 #define __pfn_to_phys(pfn)      ((pfn) << PAGE_SHIFT)
 
-/*
- * The module space lives between the addresses given by TASK_SIZE
- * and PAGE_OFFSET - it must be within 32MB of the kernel text.
- */
-#define MODULE_END      (PAGE_OFFSET)
-#define MODULE_START    (MODULE_END - 16*1048576)
-
-#if TASK_SIZE > MODULE_START
-#error Top of user space clashes with start of module space
-#endif
-
-/*
- * The XIP kernel gets mapped at the bottom of the module vm area.
- * Since we use sections to map it, this macro replaces the physical address
- * with its virtual address while keeping offset from the base section.
- */
-#define XIP_VIRT_ADDR(physaddr)  (MODULE_START + ((physaddr) & 0x000fffff))
-
 #ifndef __ASSEMBLY__
 
 /*
diff --git a/include/asm-arm/mmu.h b/include/asm-arm/mmu.h
index a457cb71984f..23dde52e0945 100644
--- a/include/asm-arm/mmu.h
+++ b/include/asm-arm/mmu.h
@@ -1,6 +1,8 @@
 #ifndef __ARM_MMU_H
 #define __ARM_MMU_H
 
+#ifdef CONFIG_MMU
+
 typedef struct {
 #if __LINUX_ARM_ARCH__ >= 6
         unsigned int id;
@@ -13,4 +15,18 @@ typedef struct {
 #define ASID(mm)        (0)
 #endif
 
+#else
+
+/*
+ * From nommu.h:
+ *  Copyright (C) 2002, David McCullough <davidm@snapgear.com>
+ *  modified for 2.6 by Hyok S. Choi <hyok.choi@samsung.com>
+ */
+typedef struct {
+        struct vm_list_struct   *vmlist;
+        unsigned long           end_brk;
+} mm_context_t;
+
+#endif
+
 #endif
diff --git a/include/asm-arm/mmu_context.h b/include/asm-arm/mmu_context.h
index 81c59facea3b..9fadb01e030d 100644
--- a/include/asm-arm/mmu_context.h
+++ b/include/asm-arm/mmu_context.h
@@ -82,6 +82,7 @@ static inline void
 switch_mm(struct mm_struct *prev, struct mm_struct *next,
           struct task_struct *tsk)
 {
+#ifdef CONFIG_MMU
         unsigned int cpu = smp_processor_id();
 
         if (prev != next) {
@@ -91,6 +92,7 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next,
                 if (cache_is_vivt())
                         cpu_clear(cpu, prev->cpu_vm_mask);
         }
+#endif
 }
 
 #define deactivate_mm(tsk,mm)   do { } while (0)
diff --git a/include/asm-arm/page-nommu.h b/include/asm-arm/page-nommu.h
new file mode 100644
index 000000000000..a1bcad060480
--- /dev/null
+++ b/include/asm-arm/page-nommu.h
@@ -0,0 +1,51 @@
+/*
+ *  linux/include/asm-arm/page-nommu.h
+ *
+ *  Copyright (C) 2004 Hyok S. Choi
+ *
+ * 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
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASMARM_PAGE_NOMMU_H
+#define _ASMARM_PAGE_NOMMU_H
+
+#if !defined(CONFIG_SMALL_TASKS) && PAGE_SHIFT < 13
+#define KTHREAD_SIZE (8192)
+#else
+#define KTHREAD_SIZE PAGE_SIZE
+#endif
+ 
+#define get_user_page(vaddr)            __get_free_page(GFP_KERNEL)
+#define free_user_page(page, addr)      free_page(addr)
+
+#define clear_page(page)        memset((page), 0, PAGE_SIZE)
+#define copy_page(to,from)      memcpy((to), (from), PAGE_SIZE)
+
+#define clear_user_page(page, vaddr, pg)        clear_page(page)
+#define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
+
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef unsigned long pte_t;
+typedef unsigned long pmd_t;
+typedef unsigned long pgd_t[2];
+typedef unsigned long pgprot_t;
+
+#define pte_val(x)      (x)
+#define pmd_val(x)      (x)
+#define pgd_val(x)      ((x)[0])
+#define pgprot_val(x)   (x)
+
+#define __pte(x)        (x)
+#define __pmd(x)        (x)
+#define __pgprot(x)     (x)
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+extern unsigned long memory_start;
+extern unsigned long memory_end;
+
+#endif
diff --git a/include/asm-arm/page.h b/include/asm-arm/page.h
index 66cfeb5290ea..63d12f0244c5 100644
--- a/include/asm-arm/page.h
+++ b/include/asm-arm/page.h
@@ -23,6 +23,12 @@
 
 #ifndef __ASSEMBLY__
 
+#ifndef CONFIG_MMU
+
+#include "page-nommu.h"
+
+#else
+
 #include <asm/glue.h>
 
 /*
@@ -171,6 +177,8 @@ typedef unsigned long pgprot_t;
 /* the upper-most page table pointer */
 extern pmd_t *top_pmd;
 
+#endif /* CONFIG_MMU */
+
 #include <asm/memory.h>
 
 #endif /* !__ASSEMBLY__ */
diff --git a/include/asm-arm/pgalloc.h b/include/asm-arm/pgalloc.h
index c4ac2e67768d..4d4394552911 100644
--- a/include/asm-arm/pgalloc.h
+++ b/include/asm-arm/pgalloc.h
@@ -16,6 +16,10 @@
 #include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
 
+#define check_pgt_cache()               do { } while (0)
+
+#ifdef CONFIG_MMU
+
 #define _PAGE_USER_TABLE        (PMD_TYPE_TABLE | PMD_BIT4 | PMD_DOMAIN(DOMAIN_USER))
 #define _PAGE_KERNEL_TABLE      (PMD_TYPE_TABLE | PMD_BIT4 | PMD_DOMAIN(DOMAIN_KERNEL))
 
@@ -32,8 +36,6 @@ extern void free_pgd_slow(pgd_t *pgd);
 #define pgd_alloc(mm)                   get_pgd_slow(mm)
 #define pgd_free(pgd)                   free_pgd_slow(pgd)
 
-#define check_pgt_cache()               do { } while (0)
-
 /*
  * Allocate one PTE table.
  *
@@ -126,4 +128,6 @@ pmd_populate(struct mm_struct *mm, pmd_t *pmdp, struct page *ptep)
         __pmd_populate(pmdp, page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE);
 }
 
+#endif /* CONFIG_MMU */
+
 #endif
diff --git a/include/asm-arm/pgtable-nommu.h b/include/asm-arm/pgtable-nommu.h
new file mode 100644
index 000000000000..b13322dccf41
--- /dev/null
+++ b/include/asm-arm/pgtable-nommu.h
@@ -0,0 +1,123 @@
+/*
+ *  linux/include/asm-arm/pgtable-nommu.h
+ *
+ *  Copyright (C) 1995-2002 Russell King
+ *  Copyright (C) 2004  Hyok S. Choi
+ *
+ * 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
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASMARM_PGTABLE_NOMMU_H
+#define _ASMARM_PGTABLE_NOMMU_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/config.h>
+#include <linux/slab.h>
+#include <asm/processor.h>
+#include <asm/page.h>
+#include <asm/io.h>
+
+/*
+ * Trivial page table functions.
+ */
+#define pgd_present(pgd)        (1)
+#define pgd_none(pgd)           (0)
+#define pgd_bad(pgd)            (0)
+#define pgd_clear(pgdp)
+#define kern_addr_valid(addr)   (1)
+#define pmd_offset(a, b)        ((void *)0)
+/* FIXME */
+/*
+ * PMD_SHIFT determines the size of the area a second-level page table can map
+ * PGDIR_SHIFT determines what a third-level page table entry can map
+ */
+#define PGDIR_SHIFT             21
+
+#define PGDIR_SIZE              (1UL << PGDIR_SHIFT)
+#define PGDIR_MASK              (~(PGDIR_SIZE-1))
+/* FIXME */
+
+#define PAGE_NONE       __pgprot(0)
+#define PAGE_SHARED     __pgprot(0)
+#define PAGE_COPY       __pgprot(0)
+#define PAGE_READONLY   __pgprot(0)
+#define PAGE_KERNEL     __pgprot(0)
+
+//extern void paging_init(struct meminfo *, struct machine_desc *);
+#define swapper_pg_dir ((pgd_t *) 0)
+
+#define __swp_type(x)           (0)
+#define __swp_offset(x)         (0)
+#define __swp_entry(typ,off)    ((swp_entry_t) { ((typ) | ((off) << 7)) })
+#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
+#define __swp_entry_to_pte(x)   ((pte_t) { (x).val })
+
+
+typedef pte_t *pte_addr_t;
+
+static inline int pte_file(pte_t pte) { return 0; }
+
+/*
+ * ZERO_PAGE is a global shared page that is always zero: used
+ * for zero-mapped memory areas etc..
+ */
+#define ZERO_PAGE(vaddr)        (virt_to_page(0))
+
+/*
+ * Mark the prot value as uncacheable and unbufferable.
+ */
+#define pgprot_noncached(prot)  __pgprot(0)
+#define pgprot_writecombine(prot) __pgprot(0)
+
+
+/*
+ * These would be in other places but having them here reduces the diffs.
+ */
+extern unsigned int kobjsize(const void *objp);
+extern int is_in_rom(unsigned long);
+
+/*
+ * No page table caches to initialise.
+ */
+#define pgtable_cache_init()    do { } while (0)
+#define io_remap_page_range     remap_page_range
+#define io_remap_pfn_range      remap_pfn_range
+
+#define MK_IOSPACE_PFN(space, pfn)      (pfn)
+#define GET_IOSPACE(pfn)                0
+#define GET_PFN(pfn)                    (pfn)
+
+
+/*
+ * All 32bit addresses are effectively valid for vmalloc...
+ * Sort of meaningless for non-VM targets.
+ */
+#define VMALLOC_START   0
+#define VMALLOC_END     0xffffffff
+
+#define FIRST_USER_ADDRESS      (0)
+
+#else 
+
+/*
+ * dummy tlb and user structures.
+ */
+#define v3_tlb_fns      (0)
+#define v4_tlb_fns      (0)
+#define v4wb_tlb_fns    (0)
+#define v4wbi_tlb_fns   (0)
+#define v6_tlb_fns      (0)
+
+#define v3_user_fns     (0)
+#define v4_user_fns     (0)
+#define v4_mc_user_fns  (0)
+#define v4wb_user_fns   (0)
+#define v4wt_user_fns   (0)
+#define v6_user_fns     (0)
+#define xscale_mc_user_fns (0)
+
+#endif /*__ASSEMBLY__*/
+
+#endif /* _ASMARM_PGTABLE_H */
diff --git a/include/asm-arm/pgtable.h b/include/asm-arm/pgtable.h
index e85c08d78dda..8d3919c6458c 100644
--- a/include/asm-arm/pgtable.h
+++ b/include/asm-arm/pgtable.h
@@ -11,9 +11,15 @@
 #define _ASMARM_PGTABLE_H
 
 #include <asm-generic/4level-fixup.h>
+#include <asm/proc-fns.h>
+
+#ifndef CONFIG_MMU
+
+#include "pgtable-nommu.h"
+
+#else
 
 #include <asm/memory.h>
-#include <asm/proc-fns.h>
 #include <asm/arch/vmalloc.h>
 
 /*
@@ -378,4 +384,6 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
 
 #endif /* !__ASSEMBLY__ */
 
+#endif /* CONFIG_MMU */
+
 #endif /* _ASMARM_PGTABLE_H */
diff --git a/include/asm-arm/proc-fns.h b/include/asm-arm/proc-fns.h
index e9310895e79d..1bde92cdaebd 100644
--- a/include/asm-arm/proc-fns.h
+++ b/include/asm-arm/proc-fns.h
@@ -165,6 +165,8 @@
 
 #include <asm/memory.h>
 
+#ifdef CONFIG_MMU
+
 #define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm)
 
 #define cpu_get_pgd()   \
@@ -176,6 +178,8 @@
                 (pgd_t *)phys_to_virt(pg);              \
         })
 
+#endif
+
 #endif /* __ASSEMBLY__ */
 #endif /* __KERNEL__ */
 #endif /* __ASM_PROCFNS_H */
diff --git a/include/asm-arm/ptrace.h b/include/asm-arm/ptrace.h
index 2bebe3dc0a30..5a8ef787dbf8 100644
--- a/include/asm-arm/ptrace.h
+++ b/include/asm-arm/ptrace.h
@@ -25,6 +25,11 @@
 
 #define PTRACE_SET_SYSCALL      23
 
+/* PTRACE_SYSCALL is 24 */
+
+#define PTRACE_GETCRUNCHREGS    25
+#define PTRACE_SETCRUNCHREGS    26
+
 /*
  * PSR bits
  */
diff --git a/include/asm-arm/thread_info.h b/include/asm-arm/thread_info.h
index cfbccb63c67b..c46b5c84275f 100644
--- a/include/asm-arm/thread_info.h
+++ b/include/asm-arm/thread_info.h
@@ -59,6 +59,7 @@ struct thread_info {
         struct cpu_context_save cpu_context;    /* cpu context */
         __u8                    used_cp[16];    /* thread used copro */
         unsigned long           tp_value;
+        struct crunch_state     crunchstate;
         union fp_state          fpstate __attribute__((aligned(8)));
         union vfp_state         vfpstate;
         struct restart_block    restart_block;
@@ -101,6 +102,11 @@ extern void free_thread_info(struct thread_info *);
 #define thread_saved_fp(tsk)    \
         ((unsigned long)(task_thread_info(tsk)->cpu_context.fp))
 
+extern void crunch_task_disable(struct thread_info *);
+extern void crunch_task_copy(struct thread_info *, void *);
+extern void crunch_task_restore(struct thread_info *, void *);
+extern void crunch_task_release(struct thread_info *);
+
 extern void iwmmxt_task_disable(struct thread_info *);
 extern void iwmmxt_task_copy(struct thread_info *, void *);
 extern void iwmmxt_task_restore(struct thread_info *, void *);
diff --git a/include/asm-arm/uaccess.h b/include/asm-arm/uaccess.h
index 064f0f5e8e2b..87aba57a66c4 100644
--- a/include/asm-arm/uaccess.h
+++ b/include/asm-arm/uaccess.h
@@ -41,15 +41,24 @@ struct exception_table_entry
 extern int fixup_exception(struct pt_regs *regs);
 
 /*
+ * These two are intentionally not defined anywhere - if the kernel
+ * code generates any references to them, that's a bug.
+ */
+extern int __get_user_bad(void);
+extern int __put_user_bad(void);
+
+/*
  * Note that this is actually 0x1,0000,0000
  */
 #define KERNEL_DS       0x00000000
-#define USER_DS         TASK_SIZE
-
 #define get_ds()        (KERNEL_DS)
+
+#ifdef CONFIG_MMU
+
+#define USER_DS         TASK_SIZE
 #define get_fs()        (current_thread_info()->addr_limit)
 
-static inline void set_fs (mm_segment_t fs)
+static inline void set_fs(mm_segment_t fs)
 {
         current_thread_info()->addr_limit = fs;
         modify_domain(DOMAIN_KERNEL, fs ? DOMAIN_CLIENT : DOMAIN_MANAGER);
@@ -75,8 +84,6 @@ static inline void set_fs (mm_segment_t fs)
                 : "cc"); \
         flag; })
 
-#define access_ok(type,addr,size)       (__range_ok(addr,size) == 0)
-
 /*
  * Single-value transfer routines.  They automatically use the right
  * size if we just have the right pointer type.  Note that the functions
@@ -87,20 +94,10 @@ static inline void set_fs (mm_segment_t fs)
  * fixup code, but there are a few places where it intrudes on the
  * main code path.  When we only write to user space, there is no
  * problem.
- *
- * The "__xxx" versions of the user access functions do not verify the
- * address space - it must have been done previously with a separate
- * "access_ok()" call.
- *
- * The "xxx_error" versions set the third argument to EFAULT if an
- * error occurs, and leave it unchanged on success.  Note that these
- * versions are void (ie, don't return a value as such).
  */
-
 extern int __get_user_1(void *);
 extern int __get_user_2(void *);
 extern int __get_user_4(void *);
-extern int __get_user_bad(void);
 
 #define __get_user_x(__r2,__p,__e,__s,__i...)                           \
            __asm__ __volatile__ (                                       \
@@ -131,6 +128,74 @@ extern int __get_user_bad(void);
                 __e;                                                    \
         })
 
+extern int __put_user_1(void *, unsigned int);
+extern int __put_user_2(void *, unsigned int);
+extern int __put_user_4(void *, unsigned int);
+extern int __put_user_8(void *, unsigned long long);
+
+#define __put_user_x(__r2,__p,__e,__s)                                  \
+           __asm__ __volatile__ (                                       \
+                __asmeq("%0", "r0") __asmeq("%2", "r2")                 \
+                "bl     __put_user_" #__s                               \
+                : "=&r" (__e)                                           \
+                : "0" (__p), "r" (__r2)                                 \
+                : "ip", "lr", "cc")
+
+#define put_user(x,p)                                                   \
+        ({                                                              \
+                const register typeof(*(p)) __r2 asm("r2") = (x);       \
+                const register typeof(*(p)) __user *__p asm("r0") = (p);\
+                register int __e asm("r0");                             \
+                switch (sizeof(*(__p))) {                               \
+                case 1:                                                 \
+                        __put_user_x(__r2, __p, __e, 1);                \
+                        break;                                          \
+                case 2:                                                 \
+                        __put_user_x(__r2, __p, __e, 2);                \
+                        break;                                          \
+                case 4:                                                 \
+                        __put_user_x(__r2, __p, __e, 4);                \
+                        break;                                          \
+                case 8:                                                 \
+                        __put_user_x(__r2, __p, __e, 8);                \
+                        break;                                          \
+                default: __e = __put_user_bad(); break;                 \
+                }                                                       \
+                __e;                                                    \
+        })
+
+#else /* CONFIG_MMU */
+
+/*
+ * uClinux has only one addr space, so has simplified address limits.
+ */
+#define USER_DS                 KERNEL_DS
+
+#define segment_eq(a,b)         (1)
+#define __addr_ok(addr)         (1)
+#define __range_ok(addr,size)   (0)
+#define get_fs()                (KERNEL_DS)
+
+static inline void set_fs(mm_segment_t fs)
+{
+}
+
+#define get_user(x,p)   __get_user(x,p)
+#define put_user(x,p)   __put_user(x,p)
+
+#endif /* CONFIG_MMU */
+
+#define access_ok(type,addr,size)       (__range_ok(addr,size) == 0)
+
+/*
+ * The "__xxx" versions of the user access functions do not verify the
+ * address space - it must have been done previously with a separate
+ * "access_ok()" call.
+ *
+ * The "xxx_error" versions set the third argument to EFAULT if an
+ * error occurs, and leave it unchanged on success.  Note that these
+ * versions are void (ie, don't return a value as such).
+ */
 #define __get_user(x,ptr)                                               \
 ({                                                                      \
         long __gu_err = 0;                                              \
@@ -212,43 +277,6 @@ do {									\
         : "r" (addr), "i" (-EFAULT)                             \
         : "cc")
 
-extern int __put_user_1(void *, unsigned int);
-extern int __put_user_2(void *, unsigned int);
-extern int __put_user_4(void *, unsigned int);
-extern int __put_user_8(void *, unsigned long long);
-extern int __put_user_bad(void);
-
-#define __put_user_x(__r2,__p,__e,__s)                                  \
-           __asm__ __volatile__ (                                       \
-                __asmeq("%0", "r0") __asmeq("%2", "r2")                 \
-                "bl     __put_user_" #__s                               \
-                : "=&r" (__e)                                           \
-                : "0" (__p), "r" (__r2)                                 \
-                : "ip", "lr", "cc")
-
-#define put_user(x,p)                                                   \
-        ({                                                              \
-                const register typeof(*(p)) __r2 asm("r2") = (x);       \
-                const register typeof(*(p)) __user *__p asm("r0") = (p);\
-                register int __e asm("r0");                             \
-                switch (sizeof(*(__p))) {                               \
-                case 1:                                                 \
-                        __put_user_x(__r2, __p, __e, 1);                \
-                        break;                                          \
-                case 2:                                                 \
-                        __put_user_x(__r2, __p, __e, 2);                \
-                        break;                                          \
-                case 4:                                                 \
-                        __put_user_x(__r2, __p, __e, 4);                \
-                        break;                                          \
-                case 8:                                                 \
-                        __put_user_x(__r2, __p, __e, 8);                \
-                        break;                                          \
-                default: __e = __put_user_bad(); break;                 \
-                }                                                       \
-                __e;                                                    \
-        })
-
 #define __put_user(x,ptr)                                               \
 ({                                                                      \
         long __pu_err = 0;                                              \
@@ -353,66 +381,54 @@ do {									\
         : "r" (x), "i" (-EFAULT)                                \
         : "cc")
 
-extern unsigned long __arch_copy_from_user(void *to, const void __user *from, unsigned long n);
-extern unsigned long __arch_copy_to_user(void __user *to, const void *from, unsigned long n);
-extern unsigned long __arch_clear_user(void __user *addr, unsigned long n);
-extern unsigned long __arch_strncpy_from_user(char *to, const char __user *from, unsigned long count);
-extern unsigned long __arch_strnlen_user(const char __user *s, long n);
+
+#ifdef CONFIG_MMU
+extern unsigned long __copy_from_user(void *to, const void __user *from, unsigned long n);
+extern unsigned long __copy_to_user(void __user *to, const void *from, unsigned long n);
+extern unsigned long __clear_user(void __user *addr, unsigned long n);
+#else
+#define __copy_from_user(to,from,n)     (memcpy(to, (void __force *)from, n), 0)
+#define __copy_to_user(to,from,n)       (memcpy((void __force *)to, from, n), 0)
+#define __clear_user(addr,n)            (memset((void __force *)addr, 0, n), 0)
+#endif
+
+extern unsigned long __strncpy_from_user(char *to, const char __user *from, unsigned long count);
+extern unsigned long __strnlen_user(const char __user *s, long n);
 
 static inline unsigned long copy_from_user(void *to, const void __user *from, unsigned long n)
 {
         if (access_ok(VERIFY_READ, from, n))
-                n = __arch_copy_from_user(to, from, n);
+                n = __copy_from_user(to, from, n);
         else /* security hole - plug it */
                 memzero(to, n);
         return n;
 }
 
-static inline unsigned long __copy_from_user(void *to, const void __user *from, unsigned long n)
-{
-        return __arch_copy_from_user(to, from, n);
-}
-
 static inline unsigned long copy_to_user(void __user *to, const void *from, unsigned long n)
 {
         if (access_ok(VERIFY_WRITE, to, n))
-                n = __arch_copy_to_user(to, from, n);
+                n = __copy_to_user(to, from, n);
         return n;
 }
 
-static inline unsigned long __copy_to_user(void __user *to, const void *from, unsigned long n)
-{
-        return __arch_copy_to_user(to, from, n);
-}
-
 #define __copy_to_user_inatomic __copy_to_user
 #define __copy_from_user_inatomic __copy_from_user
 
-static inline unsigned long clear_user (void __user *to, unsigned long n)
+static inline unsigned long clear_user(void __user *to, unsigned long n)
 {
         if (access_ok(VERIFY_WRITE, to, n))
-                n = __arch_clear_user(to, n);
+                n = __clear_user(to, n);
         return n;
 }
 
-static inline unsigned long __clear_user (void __user *to, unsigned long n)
-{
-        return __arch_clear_user(to, n);
-}
-
-static inline long strncpy_from_user (char *dst, const char __user *src, long count)
+static inline long strncpy_from_user(char *dst, const char __user *src, long count)
 {
         long res = -EFAULT;
         if (access_ok(VERIFY_READ, src, 1))
-                res = __arch_strncpy_from_user(dst, src, count);
+                res = __strncpy_from_user(dst, src, count);
         return res;
 }
 
-static inline long __strncpy_from_user (char *dst, const char __user *src, long count)
-{
-        return __arch_strncpy_from_user(dst, src, count);
-}
-
 #define strlen_user(s)  strnlen_user(s, ~0UL >> 1)
 
 static inline long strnlen_user(const char __user *s, long n)
@@ -420,7 +436,7 @@ static inline long strnlen_user(const char __user *s, long n)
         unsigned long res = 0;
 
         if (__addr_ok(s))
-                res = __arch_strnlen_user(s, n);
+                res = __strnlen_user(s, n);
 
         return res;
 }
diff --git a/include/asm-arm/ucontext.h b/include/asm-arm/ucontext.h
index 9e6f7ca9f5ae..bf65e9f4525d 100644
--- a/include/asm-arm/ucontext.h
+++ b/include/asm-arm/ucontext.h
@@ -35,6 +35,17 @@ struct ucontext {
  * bytes, to prevent unpredictable padding in the signal frame.
  */
 
+#ifdef CONFIG_CRUNCH
+#define CRUNCH_MAGIC            0x5065cf03
+#define CRUNCH_STORAGE_SIZE     (CRUNCH_SIZE + 8)
+
+struct crunch_sigframe {
+        unsigned long   magic;
+        unsigned long   size;
+        struct crunch_state     storage;
+} __attribute__((__aligned__(8)));
+#endif
+
 #ifdef CONFIG_IWMMXT
 /* iwmmxt_area is 0x98 bytes long, preceeded by 8 bytes of signature */
 #define IWMMXT_MAGIC            0x12ef842a
@@ -74,6 +85,9 @@ struct vfp_sigframe
  * one of these.
  */
 struct aux_sigframe {
+#ifdef CONFIG_CRUNCH
+        struct crunch_sigframe  crunch;
+#endif
 #ifdef CONFIG_IWMMXT
         struct iwmmxt_sigframe  iwmmxt;
 #endif