MIPS: MIPSsim: Fix build error if MSC01E_INT_BASE is undefined.

[safe/jmp/linux-2.6] / arch / mips / mm / highmem.c

diff --git a/arch/mips/mm/highmem.c b/arch/mips/mm/highmem.c
index 1f7b37b..e274fda 100644 (file)
--- a/arch/mips/mm/highmem.c
+++ b/arch/mips/mm/highmem.c
@@ -1,8 +1,13 @@
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/highmem.h>
+#include <linux/smp.h>
+#include <asm/fixmap.h>
 #include <asm/tlbflush.h>
 
+static pte_t *kmap_pte;
+
+unsigned long highstart_pfn, highend_pfn;
+
 void *__kmap(struct page *page)
 {
        void *addr;
@@ -15,15 +20,16 @@ void *__kmap(struct page *page)
 
        return addr;
 }
+EXPORT_SYMBOL(__kmap);
 
 void __kunmap(struct page *page)
 {
-       if (in_interrupt())
-               BUG();
+       BUG_ON(in_interrupt());
        if (!PageHighMem(page))
                return;
        kunmap_high(page);
 }
+EXPORT_SYMBOL(__kunmap);
 
 /*
  * kmap_atomic/kunmap_atomic is significantly faster than kmap/kunmap because
@@ -40,21 +46,22 @@ void *__kmap_atomic(struct page *page, enum km_type type)
        unsigned long vaddr;
 
        /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
-       inc_preempt_count();
+       pagefault_disable();
        if (!PageHighMem(page))
                return page_address(page);
 
+       debug_kmap_atomic(type);
        idx = type + KM_TYPE_NR*smp_processor_id();
        vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
 #ifdef CONFIG_DEBUG_HIGHMEM
-       if (!pte_none(*(kmap_pte-idx)))
-               BUG();
+       BUG_ON(!pte_none(*(kmap_pte - idx)));
 #endif
-       set_pte(kmap_pte-idx, mk_pte(page, kmap_prot));
+       set_pte(kmap_pte-idx, mk_pte(page, PAGE_KERNEL));
        local_flush_tlb_one((unsigned long)vaddr);
 
        return (void*) vaddr;
 }
+EXPORT_SYMBOL(__kmap_atomic);
 
 void __kunmap_atomic(void *kvaddr, enum km_type type)
 {
@@ -63,13 +70,11 @@ void __kunmap_atomic(void *kvaddr, enum km_type type)
        enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id();
 
        if (vaddr < FIXADDR_START) { // FIXME
-               dec_preempt_count();
-               preempt_check_resched();
+               pagefault_enable();
                return;
        }
 
-       if (vaddr != __fix_to_virt(FIX_KMAP_BEGIN+idx))
-               BUG();
+       BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx));
 
        /*
         * force other mappings to Oops if they'll try to access
@@ -79,9 +84,9 @@ void __kunmap_atomic(void *kvaddr, enum km_type type)
        local_flush_tlb_one(vaddr);
 #endif
 
-       dec_preempt_count();
-       preempt_check_resched();
+       pagefault_enable();
 }
+EXPORT_SYMBOL(__kunmap_atomic);
 
 /*
  * This is the same as kmap_atomic() but can map memory that doesn't
@@ -92,11 +97,12 @@ void *kmap_atomic_pfn(unsigned long pfn, enum km_type type)
        enum fixed_addresses idx;
        unsigned long vaddr;
 
-       inc_preempt_count();
+       pagefault_disable();
 
+       debug_kmap_atomic(type);
        idx = type + KM_TYPE_NR*smp_processor_id();
        vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
-       set_pte(kmap_pte-idx, pfn_pte(pfn, kmap_prot));
+       set_pte(kmap_pte-idx, pfn_pte(pfn, PAGE_KERNEL));
        flush_tlb_one(vaddr);
 
        return (void*) vaddr;
@@ -115,8 +121,11 @@ struct page *__kmap_atomic_to_page(void *ptr)
        return pte_page(*pte);
 }
 
-EXPORT_SYMBOL(__kmap);
-EXPORT_SYMBOL(__kunmap);
-EXPORT_SYMBOL(__kmap_atomic);
-EXPORT_SYMBOL(__kunmap_atomic);
-EXPORT_SYMBOL(__kmap_atomic_to_page);
+void __init kmap_init(void)
+{
+       unsigned long kmap_vstart;
+
+       /* cache the first kmap pte */
+       kmap_vstart = __fix_to_virt(FIX_KMAP_BEGIN);
+       kmap_pte = kmap_get_fixmap_pte(kmap_vstart);
+}