microblaze: PCI early support for noMMU system
Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/arch/microblaze/include/asm/pgalloc.h b/arch/microblaze/include/asm/pgalloc.h
index 7547f50..f44b0d6 100644
--- a/arch/microblaze/include/asm/pgalloc.h
+++ b/arch/microblaze/include/asm/pgalloc.h
@@ -19,6 +19,7 @@
#include <asm/io.h>
#include <asm/page.h>
#include <asm/cache.h>
+#include <asm/pgtable.h>
#define PGDIR_ORDER 0
@@ -111,7 +112,6 @@
unsigned long address)
{
pte_t *pte;
- extern int mem_init_done;
extern void *early_get_page(void);
if (mem_init_done) {
pte = (pte_t *)__get_free_page(GFP_KERNEL |
diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h
index adcc332..dd2bb60 100644
--- a/arch/microblaze/include/asm/pgtable.h
+++ b/arch/microblaze/include/asm/pgtable.h
@@ -16,6 +16,10 @@
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
remap_pfn_range(vma, vaddr, pfn, size, prot)
+#ifndef __ASSEMBLY__
+extern int mem_init_done;
+#endif
+
#ifndef CONFIG_MMU
#define pgd_present(pgd) (1) /* pages are always present on non MMU */
@@ -51,6 +55,8 @@
#define arch_enter_lazy_cpu_mode() do {} while (0)
+#define pgprot_noncached_wc(prot) prot
+
#else /* CONFIG_MMU */
#include <asm-generic/4level-fixup.h>
diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index aa6e163..1608e2e 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -23,6 +23,9 @@
#include <asm/sections.h>
#include <asm/tlb.h>
+/* Use for MMU and noMMU because of PCI generic code */
+int mem_init_done;
+
#ifndef CONFIG_MMU
unsigned int __page_offset;
EXPORT_SYMBOL(__page_offset);
@@ -30,7 +33,6 @@
#else
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
-int mem_init_done;
static int init_bootmem_done;
#endif /* CONFIG_MMU */
@@ -202,9 +204,7 @@
printk(KERN_INFO "Memory: %luk/%luk available\n",
nr_free_pages() << (PAGE_SHIFT-10),
num_physpages << (PAGE_SHIFT-10));
-#ifdef CONFIG_MMU
mem_init_done = 1;
-#endif
}
#ifndef CONFIG_MMU
@@ -216,6 +216,10 @@
}
EXPORT_SYMBOL(___range_ok);
+int page_is_ram(unsigned long pfn)
+{
+ return __range_ok(pfn, 0);
+}
#else
int page_is_ram(unsigned long pfn)
{
@@ -344,6 +348,8 @@
return p;
}
+#endif /* CONFIG_MMU */
+
void * __init_refok alloc_maybe_bootmem(size_t size, gfp_t mask)
{
if (mem_init_done)
@@ -365,5 +371,3 @@
}
return p;
}
-
-#endif /* CONFIG_MMU */
diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c
index f03f8be..0be3435 100644
--- a/arch/microblaze/pci/pci-common.c
+++ b/arch/microblaze/pci/pci-common.c
@@ -561,11 +561,13 @@
* memory, effectively behaving just like /dev/zero
*/
if ((offset + size) > hose->isa_mem_size) {
+#ifdef CONFIG_MMU
printk(KERN_DEBUG
"Process %s (pid:%d) mapped non-existing PCI"
"legacy memory for 0%04x:%02x\n",
current->comm, current->pid, pci_domain_nr(bus),
bus->number);
+#endif
if (vma->vm_flags & VM_SHARED)
return shmem_zero_setup(vma);
return 0;