4 files changed, 49 insertions, 28 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index fdc755a05f70..20f45a8b87e3 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -626,20 +626,6 @@ config ADVANCED_OPTIONS
 comment "Default settings for advanced configuration options are used"
         depends on !ADVANCED_OPTIONS
 
-config HIGHMEM_START_BOOL
-        bool "Set high memory pool address"
-        depends on ADVANCED_OPTIONS && HIGHMEM
-        help
-          This option allows you to set the base address of the kernel virtual
-          area used to map high memory pages.  This can be useful in
-          optimizing the layout of kernel virtual memory.
-
-          Say N here unless you know what you are doing.
-
-config HIGHMEM_START
-        hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
-        default "0xfe000000"
-
 config LOWMEM_SIZE_BOOL
         bool "Set maximum low memory"
         depends on ADVANCED_OPTIONS
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index 578750e4ca88..1952b4d3fa7f 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c
@@ -71,14 +71,6 @@ unsigned long agp_special_page;
 EXPORT_SYMBOL(agp_special_page);
 #endif
 
-#ifdef CONFIG_HIGHMEM
-pte_t *kmap_pte;
-pgprot_t kmap_prot;
-
-EXPORT_SYMBOL(kmap_prot);
-EXPORT_SYMBOL(kmap_pte);
-#endif
-
 void MMU_init(void);
 
 /* XXX should be in current.h  -- paulus */
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 0062e6b1c555..5ccb579b81e4 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -45,6 +45,7 @@
 #include <asm/tlb.h>
 #include <asm/sections.h>
 #include <asm/vdso.h>
+#include <asm/fixmap.h>
 
 #include "mmu_decl.h"
 
@@ -57,6 +58,20 @@ int init_bootmem_done;
 int mem_init_done;
 unsigned long memory_limit;
 
+#ifdef CONFIG_HIGHMEM
+pte_t *kmap_pte;
+pgprot_t kmap_prot;
+
+EXPORT_SYMBOL(kmap_prot);
+EXPORT_SYMBOL(kmap_pte);
+
+static inline pte_t *virt_to_kpte(unsigned long vaddr)
+{
+        return pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr),
+                        vaddr), vaddr), vaddr);
+}
+#endif
+
 int page_is_ram(unsigned long pfn)
 {
         unsigned long paddr = (pfn << PAGE_SHIFT);
@@ -311,14 +326,19 @@ void __init paging_init(void)
         unsigned long top_of_ram = lmb_end_of_DRAM();
         unsigned long max_zone_pfns[MAX_NR_ZONES];
 
+#ifdef CONFIG_PPC32
+        unsigned long v = __fix_to_virt(__end_of_fixed_addresses - 1);
+        unsigned long end = __fix_to_virt(FIX_HOLE);
+
+        for (; v < end; v += PAGE_SIZE)
+                map_page(v, 0, 0); /* XXX gross */
+#endif
+
 #ifdef CONFIG_HIGHMEM
         map_page(PKMAP_BASE, 0, 0);     /* XXX gross */
-        pkmap_page_table = pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k
-                        (PKMAP_BASE), PKMAP_BASE), PKMAP_BASE), PKMAP_BASE);
-        map_page(KMAP_FIX_BEGIN, 0, 0); /* XXX gross */
-        kmap_pte = pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k
-                        (KMAP_FIX_BEGIN), KMAP_FIX_BEGIN), KMAP_FIX_BEGIN),
-                         KMAP_FIX_BEGIN);
+        pkmap_page_table = virt_to_kpte(PKMAP_BASE);
+
+        kmap_pte = virt_to_kpte(__fix_to_virt(FIX_KMAP_BEGIN));
         kmap_prot = PAGE_KERNEL;
 #endif /* CONFIG_HIGHMEM */
 
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 64c44bcc68de..80d1babb230d 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -29,6 +29,7 @@
 
 #include <asm/pgtable.h>
 #include <asm/pgalloc.h>
+#include <asm/fixmap.h>
 #include <asm/io.h>
 
 #include "mmu_decl.h"
@@ -387,3 +388,25 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
         change_page_attr(page, numpages, enable ? PAGE_KERNEL : __pgprot(0));
 }
 #endif /* CONFIG_DEBUG_PAGEALLOC */
+
+static int fixmaps;
+unsigned long FIXADDR_TOP = 0xfffff000;
+EXPORT_SYMBOL(FIXADDR_TOP);
+
+void __set_fixmap (enum fixed_addresses idx, phys_addr_t phys, pgprot_t flags)
+{
+        unsigned long address = __fix_to_virt(idx);
+
+        if (idx >= __end_of_fixed_addresses) {
+                BUG();
+                return;
+        }
+
+        map_page(address, phys, flags);
+        fixmaps++;
+}
+
+void __this_fixmap_does_not_exist(void)
+{
+        WARN_ON(1);
+}