[coldfire]: switch to 2.6.38

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31546 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 0 insertions, 317 deletions

diff --git a/target/linux/coldfire/files-2.6.31/arch/m68k/mm/cf-mmu.c b/target/linux/coldfire/files-2.6.31/arch/m68k/mm/cf-mmu.c
deleted file mode 100644
index 8e9685086..000000000
--- a/target/linux/coldfire/files-2.6.31/arch/m68k/mm/cf-mmu.c
+++ /dev/null
@@ -1,317 +0,0 @@
-/*
- * linux/arch/m68k/mm/cf-mmu.c
- *
- * Based upon linux/arch/m68k/mm/sun3mmu.c
- * Based upon linux/arch/ppc/mm/mmu_context.c
- *
- * Implementations of mm routines specific to the Coldfire MMU.
- *
- * Copyright (c) 2008 Freescale Semiconductor, Inc.
- * Copyright Freescale Semiconductor, Inc. 2008-2009
- *   Jason Jin Jason.Jin@freescale.com
- *   Shrek Wu B16972@freescale.com
- */
-
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#ifdef CONFIG_BLK_DEV_RAM
-#include <linux/blkdev.h>
-#endif
-#include <linux/bootmem.h>
-
-#include <asm/setup.h>
-#include <asm/uaccess.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/machdep.h>
-#include <asm/io.h>
-#include <asm/mmu_context.h>
-#include <asm/cf_pgalloc.h>
-
-#include <asm/coldfire.h>
-#include <asm/tlbflush.h>
-
-#define KMAPAREA(x)	((x >= VMALLOC_START) && (x < KMAP_END))
-
-#undef DEBUG
-
-#ifdef CONFIG_VDSO
-unsigned long next_mmu_context;
-#else
-mm_context_t next_mmu_context;
-#endif
-
-unsigned long context_map[LAST_CONTEXT / BITS_PER_LONG + 1];
-
-atomic_t nr_free_contexts;
-struct mm_struct *context_mm[LAST_CONTEXT+1];
-void steal_context(void);
-#ifdef CONFIG_M5445X
-void m68k_setup_node(int);
-#endif
-const char bad_pmd_string[] = "Bad pmd in pte_alloc: %08lx\n";
-
-extern unsigned long empty_bad_page_table;
-extern unsigned long empty_bad_page;
-extern unsigned long num_pages;
-#ifdef CONFIG_M5445X
-extern unsigned long availmem;
-#endif
-extern char __init_begin, __init_end;
-
-/*
- * Free memory used for system initialization.
- */
-void free_initmem(void)
-{
-#if 0
-	unsigned long addr;
-	unsigned long start = (unsigned long)&__init_begin;
-	unsigned long end = (unsigned long)&__init_end;
-
-	printk(KERN_INFO "free_initmem: __init_begin = 0x%lx  __init_end = 0x%lx\n", start, end);
-
-	addr = (unsigned long)&__init_begin;
-	for (; addr < (unsigned long)&__init_end; addr += PAGE_SIZE) {
-		/* not currently used */
-		virt_to_page(addr)->flags &= ~(1 << PG_reserved);
-		init_page_count(virt_to_page(addr));
-		free_page(addr);
-		totalram_pages++;
-	}
-#endif
-}
-
-/*
- * Initialize the paging system.
- */
-void __init paging_init(void)
-{
-	pgd_t * pg_dir;
-	pte_t * pg_table;
-	int i;
-	unsigned long address;
-	unsigned long next_pgtable;
-	unsigned long zones_size[MAX_NR_ZONES];
-	unsigned long size;
-	enum zone_type zone;
-
-	/* allocate zero page */
-	empty_zero_page = (void *)alloc_bootmem_pages(PAGE_SIZE);
-	memset((void *)empty_zero_page, 0, PAGE_SIZE);
-
-	/* zero kernel page directory */
-	pg_dir = swapper_pg_dir;
-	memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir));
-	/*
-	 * setup page tables for PHYSRAM
-	 */
-
-	/* starting loc in page directory */
-	pg_dir += PAGE_OFFSET >> PGDIR_SHIFT; 
-
-	/* allocate page tables */
-	size = num_pages * sizeof(pte_t);  
-	size = (size + PAGE_SIZE) & ~(PAGE_SIZE-1);
-	next_pgtable = (unsigned long)alloc_bootmem_pages(size);
-	address = PAGE_OFFSET;
-	while (address < (unsigned long)high_memory) {
-		/* setup page table in page directory */
-    		pg_table = (pte_t *)next_pgtable; 
-	    	next_pgtable += PTRS_PER_PTE * sizeof(pte_t);
-		pgd_val(*pg_dir) = (unsigned long)pg_table;
-		pg_dir++;
-
-		/* create PTEs in page table */
-		for (i=0; i<PTRS_PER_PTE; ++i, ++pg_table) {
-			pte_t pte = pfn_pte(virt_to_pfn(address), PAGE_INIT);
-			if (address >= (unsigned long)high_memory)
-				pte_val (pte) = 0;
-
-			set_pte(pg_table, pte);
-			address += PAGE_SIZE;
-		}
-	}
-
-	/*
-	 * setup page tables for DMA area
-	 */
-
-	/* starting loc in page directory */
-	pg_dir = swapper_pg_dir;
-	pg_dir += CONFIG_DMA_BASE >> PGDIR_SHIFT; 
-
-	/* allocate page tables */
-	size = (CONFIG_DMA_SIZE >> PAGE_SHIFT) * sizeof(pte_t);  
-	size = (size + PAGE_SIZE) & ~(PAGE_SIZE-1);
-	next_pgtable = (unsigned long)alloc_bootmem_pages(size);
-	address = CONFIG_DMA_BASE;
-	while (address < (CONFIG_DMA_BASE + CONFIG_DMA_SIZE)) {
-		/* setup page table in page directory */
-    		pg_table = (pte_t *)next_pgtable; 
-	    	next_pgtable += PTRS_PER_PTE * sizeof(pte_t);
-		pgd_val(*pg_dir) = (unsigned long)pg_table;
-		pg_dir++;
-
-		/* create PTEs in page table */
-		for (i=0; i<PTRS_PER_PTE; ++i, ++pg_table) {
-			pte_t pte = pfn_pte(virt_to_pfn(address), PAGE_INIT);
-			if (address >= (CONFIG_DMA_BASE + CONFIG_DMA_SIZE))
-				pte_val (pte) = 0;
-
-			set_pte(pg_table, pte);
-			address += PAGE_SIZE;
-		}
-	}
-
-	/*
-	 * setup zones
-	 */
-
-	current->mm = NULL;
-
-	/* clear zones */
-	for (zone = 0; zone < MAX_NR_ZONES; zone++)
-		zones_size[zone] = 0x0;
-
-	zones_size[ZONE_DMA] = CONFIG_DMA_SIZE >> PAGE_SHIFT;
-	zones_size[ZONE_NORMAL] = (((unsigned long)high_memory -
-				    PAGE_OFFSET) >> PAGE_SHIFT) -
-				   zones_size[ZONE_DMA];
-
-	free_area_init(zones_size);
-}
-/*
- * Handle a missed TLB
- */
-int cf_tlb_miss(struct pt_regs *regs, int write, int dtlb, int extension_word)
-{
-        struct mm_struct *mm;
-        pgd_t *pgd;
-        pmd_t *pmd;
-        pte_t *pte;
-        unsigned long mmuar;
-        int asid;
-	int flags;
-
-	local_save_flags(flags);
-	local_irq_disable();
-
-	mmuar = ( dtlb ) ? regs->mmuar
-			 : regs->pc + (extension_word * sizeof(long));
-
-        mm = (!user_mode(regs) && KMAPAREA(mmuar)) ? &init_mm : current->mm;
-
-        if (!mm) {
-	    local_irq_restore(flags);
-	    return (-1);
-	}
-
-        pgd = pgd_offset(mm, mmuar);
-        if (pgd_none(*pgd))  {
-	    local_irq_restore(flags);
-	    return (-1);
-	}
-	    
-    	pmd = pmd_offset(pgd, mmuar);
-    	if (pmd_none(*pmd)) {
-	    local_irq_restore(flags);
-	    return (-1);
-	}	
-    
-	pte = (KMAPAREA(mmuar)) ? pte_offset_kernel(pmd, mmuar)
-	                       : pte_offset_map(pmd, mmuar);
-    	if (pte_none(*pte) || !pte_present(*pte)) {
-	    local_irq_restore(flags);
-	    return (-1);		
-	}
-
-	if (write) {
-            if (!pte_write(*pte)) {
-		local_irq_restore(flags);
-	    	return (-1);
-	    }
-    	    set_pte(pte, pte_mkdirty(*pte));
-	}
-	
-        set_pte(pte, pte_mkyoung(*pte));
-        asid = cpu_context(mm) & 0xff;
-        if (!pte_dirty(*pte) && !KMAPAREA(mmuar))
-    	    set_pte(pte, pte_wrprotect(*pte));
-
-        *MMUTR = (mmuar & PAGE_MASK) | (asid << CF_ASID_MMU_SHIFT)
-               | (((int)(pte->pte) & (int)CF_PAGE_MMUTR_MASK ) >> CF_PAGE_MMUTR_SHIFT)
-               | MMUTR_V;
-
-        *MMUDR = (pte_val(*pte) & PAGE_MASK) 
-	       | ((pte->pte) & CF_PAGE_MMUDR_MASK)
-               | MMUDR_SZ8K | MMUDR_X;
-	    
-	if ( dtlb )
-    	    *MMUOR = MMUOR_ACC | MMUOR_UAA;
-	else
-	    *MMUOR = MMUOR_ITLB | MMUOR_ACC | MMUOR_UAA;
-
-	asm("nop");
-
-#ifdef DEBUG
-	printk("cf_tlb_miss: va=%lx, pa=%lx\n", (mmuar & PAGE_MASK), 
-		  (pte_val(*pte)  & PAGE_MASK));
-#endif
-	local_irq_restore(flags);
-        return (0);
-}
-
-
-/*
- * Context Management
- *
- * Based on arch/ppc/mmu_context.c
- */
-
-/*
- * Initialize the context management system.
- */
-void __init mmu_context_init(void)
-{
-	/*
-	 * Some processors have too few contexts to reserve one for
-	 * init_mm, and require using context 0 for a normal task.
-	 * Other processors reserve the use of context zero for the kernel.
-	 * This code assumes FIRST_CONTEXT < 32.
-	 */
-	context_map[0] = (1 << FIRST_CONTEXT) - 1;
-	next_mmu_context = FIRST_CONTEXT;
-	atomic_set(&nr_free_contexts, LAST_CONTEXT - FIRST_CONTEXT + 1);
-}
-
-/*
- * Steal a context from a task that has one at the moment.
- * This is only used on 8xx and 4xx and we presently assume that
- * they don't do SMP.  If they do then thicfpgalloc.hs will have to check
- * whether the MM we steal is in use.
- * We also assume that this is only used on systems that don't
- * use an MMU hash table - this is true for 8xx and 4xx.
- * This isn't an LRU system, it just frees up each context in
- * turn (sort-of pseudo-random replacement :).  This would be the
- * place to implement an LRU scheme if anyone was motivated to do it.
- *  -- paulus
- */
-void steal_context(void)
-{
-	struct mm_struct *mm;
-	/* free up context `next_mmu_context' */
-	/* if we shouldn't free context 0, don't... */
-	if (next_mmu_context < FIRST_CONTEXT)
-		next_mmu_context = FIRST_CONTEXT;
-	mm = context_mm[next_mmu_context];
-	flush_tlb_mm(mm);
-	destroy_context(mm);
-}