5 files changed, 47 insertions, 29 deletions
diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index 69c0258700b2..3279ef457c57 100644
--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig
@@ -65,6 +65,9 @@ config STACKTRACE_SUPPORT
 config LOCKDEP_SUPPORT
 	def_bool  y
 
+config FIX_EARLYCON_MEM
+	def_bool y
+
 menu "Processor type and features"
 
 choice
diff --git a/arch/openrisc/include/asm/fixmap.h b/arch/openrisc/include/asm/fixmap.h
index ecdb98a5839f..aaa6a26a3e92 100644
--- a/arch/openrisc/include/asm/fixmap.h
+++ b/arch/openrisc/include/asm/fixmap.h
@@ -26,29 +26,18 @@
 #include <linux/bug.h>
 #include <asm/page.h>
 
-/*
- * On OpenRISC we use these special fixed_addresses for doing ioremap
- * early in the boot process before memory initialization is complete.
- * This is used, in particular, by the early serial console code.
- *
- * It's not really 'fixmap', per se, but fits loosely into the same
- * paradigm.
- */
 enum fixed_addresses {
-	/*
-	 * FIX_IOREMAP entries are useful for mapping physical address
-	 * space before ioremap() is useable, e.g. really early in boot
-	 * before kmalloc() is working.
-	 */
-#define FIX_N_IOREMAPS  32
-	FIX_IOREMAP_BEGIN,
-	FIX_IOREMAP_END = FIX_IOREMAP_BEGIN + FIX_N_IOREMAPS - 1,
+	FIX_EARLYCON_MEM_BASE,
 	__end_of_fixed_addresses
 };
 
 #define FIXADDR_SIZE		(__end_of_fixed_addresses << PAGE_SHIFT)
 /* FIXADDR_BOTTOM might be a better name here... */
 #define FIXADDR_START		(FIXADDR_TOP - FIXADDR_SIZE)
+#define FIXMAP_PAGE_IO		PAGE_KERNEL_NOCACHE
+
+extern void __set_fixmap(enum fixed_addresses idx,
+			 phys_addr_t phys, pgprot_t flags);
 
 #include <asm-generic/fixmap.h>
 
diff --git a/arch/openrisc/include/asm/page.h b/arch/openrisc/include/asm/page.h
index 1d5913f67c31..c589e96035e1 100644
--- a/arch/openrisc/include/asm/page.h
+++ b/arch/openrisc/include/asm/page.h
@@ -15,16 +15,7 @@
 #ifndef __ASM_OPENRISC_PAGE_H
 #define __ASM_OPENRISC_PAGE_H
 
-
-/* PAGE_SHIFT determines the page size */
-
-#define PAGE_SHIFT      CONFIG_PAGE_SHIFT
-#ifdef __ASSEMBLY__
-#define PAGE_SIZE       (1 << PAGE_SHIFT)
-#else
-#define PAGE_SIZE       (1UL << PAGE_SHIFT)
-#endif
-#define PAGE_MASK       (~(PAGE_SIZE-1))
+#include <vdso/page.h>
 
 #define PAGE_OFFSET	0xc0000000
 #define KERNELBASE	PAGE_OFFSET
@@ -80,8 +71,6 @@ static inline unsigned long virt_to_pfn(const void *kaddr)
 #define virt_to_page(addr) \
 	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
 
-#define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
-
 #define virt_addr_valid(kaddr)	(pfn_valid(virt_to_pfn(kaddr)))
 
 #endif /* __ASSEMBLY__ */
diff --git a/arch/openrisc/kernel/prom.c b/arch/openrisc/kernel/prom.c
index 19e6008bf114..e424e9bd12a7 100644
--- a/arch/openrisc/kernel/prom.c
+++ b/arch/openrisc/kernel/prom.c
@@ -22,6 +22,6 @@
 
 void __init early_init_devtree(void *params)
 {
-	early_init_dt_scan(params);
+	early_init_dt_scan(params, __pa(params));
 	memblock_allow_resize();
 }
diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
index 1dcd78c8f0e9..d0cb1a0126f9 100644
--- a/arch/openrisc/mm/init.c
+++ b/arch/openrisc/mm/init.c
@@ -207,6 +207,43 @@ void __init mem_init(void)
 	return;
 }
 
+static int __init map_page(unsigned long va, phys_addr_t pa, pgprot_t prot)
+{
+	p4d_t *p4d;
+	pud_t *pud;
+	pmd_t *pmd;
+	pte_t *pte;
+
+	p4d = p4d_offset(pgd_offset_k(va), va);
+	pud = pud_offset(p4d, va);
+	pmd = pmd_offset(pud, va);
+	pte = pte_alloc_kernel(pmd, va);
+
+	if (pte == NULL)
+		return -ENOMEM;
+
+	if (pgprot_val(prot))
+		set_pte_at(&init_mm, va, pte, pfn_pte(pa >> PAGE_SHIFT, prot));
+	else
+		pte_clear(&init_mm, va, pte);
+
+	local_flush_tlb_page(NULL, va);
+	return 0;
+}
+
+void __init __set_fixmap(enum fixed_addresses idx,
+			 phys_addr_t phys, pgprot_t prot)
+{
+	unsigned long address = __fix_to_virt(idx);
+
+	if (idx >= __end_of_fixed_addresses) {
+		BUG();
+		return;
+	}
+
+	map_page(address, phys, prot);
+}
+
 static const pgprot_t protection_map[16] = {
 	[VM_NONE]					= PAGE_NONE,
 	[VM_READ]					= PAGE_READONLY_X,