sh: Fold fixed-PMB support into dynamic PMB support
The initialisation process differs for CONFIG_PMB and for
CONFIG_PMB_FIXED. For CONFIG_PMB_FIXED we need to register the PMB
entries that were allocated by the bootloader.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/include/asm/mmu.h b/arch/sh/include/asm/mmu.h
index 9c84b45..c7426ad 100644
--- a/arch/sh/include/asm/mmu.h
+++ b/arch/sh/include/asm/mmu.h
@@ -15,6 +15,8 @@
#define PMB_E_MASK 0x0000000f
#define PMB_E_SHIFT 8
+#define PMB_PFN_MASK 0xff000000
+
#define PMB_SZ_16M 0x00000000
#define PMB_SZ_64M 0x00000010
#define PMB_SZ_128M 0x00000080
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 8fdd03a..df65fe2 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -453,7 +453,7 @@
paging_init();
-#ifdef CONFIG_PMB
+#ifdef CONFIG_PMB_ENABLE
pmb_init();
#endif
diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile
index 3759bf8..8a70535 100644
--- a/arch/sh/mm/Makefile
+++ b/arch/sh/mm/Makefile
@@ -33,8 +33,7 @@
endif
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
-obj-$(CONFIG_PMB) += pmb.o
-obj-$(CONFIG_PMB_FIXED) += pmb-fixed.o
+obj-$(CONFIG_PMB_ENABLE) += pmb.o
obj-$(CONFIG_NUMA) += numa.o
# Special flags for fault_64.o. This puts restrictions on the number of
diff --git a/arch/sh/mm/pmb-fixed.c b/arch/sh/mm/pmb-fixed.c
deleted file mode 100644
index 43c8eac..0000000
--- a/arch/sh/mm/pmb-fixed.c
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * arch/sh/mm/fixed_pmb.c
- *
- * Copyright (C) 2009 Renesas Solutions Corp.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#include <linux/init.h>
-#include <linux/mm.h>
-#include <linux/io.h>
-#include <asm/mmu.h>
-#include <asm/mmu_context.h>
-
-static int __uses_jump_to_uncached fixed_pmb_init(void)
-{
- int i;
- unsigned long addr, data;
-
- jump_to_uncached();
-
- for (i = 0; i < PMB_ENTRY_MAX; i++) {
- addr = PMB_DATA + (i << PMB_E_SHIFT);
- data = ctrl_inl(addr);
- if (!(data & PMB_V))
- continue;
-
- if (data & PMB_C) {
-#if defined(CONFIG_CACHE_WRITETHROUGH)
- data |= PMB_WT;
-#elif defined(CONFIG_CACHE_WRITEBACK)
- data &= ~PMB_WT;
-#else
- data &= ~(PMB_C | PMB_WT);
-#endif
- }
- ctrl_outl(data, addr);
- }
-
- back_to_cached();
-
- return 0;
-}
-arch_initcall(fixed_pmb_init);
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c
index 7e64f6d..280f6a1 100644
--- a/arch/sh/mm/pmb.c
+++ b/arch/sh/mm/pmb.c
@@ -70,14 +70,20 @@
}
static struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
- unsigned long flags)
+ unsigned long flags, int entry)
{
struct pmb_entry *pmbe;
int pos;
- pos = pmb_alloc_entry();
- if (pos < 0)
- return ERR_PTR(pos);
+ if (entry == PMB_NO_ENTRY) {
+ pos = pmb_alloc_entry();
+ if (pos < 0)
+ return ERR_PTR(pos);
+ } else {
+ if (test_bit(entry, &pmb_map))
+ return ERR_PTR(-ENOSPC);
+ pos = entry;
+ }
pmbe = &pmb_entry_list[pos];
if (!pmbe)
@@ -187,7 +193,8 @@
if (size < pmb_sizes[i].size)
continue;
- pmbe = pmb_alloc(vaddr, phys, pmb_flags | pmb_sizes[i].flag);
+ pmbe = pmb_alloc(vaddr, phys, pmb_flags | pmb_sizes[i].flag,
+ PMB_NO_ENTRY);
if (IS_ERR(pmbe)) {
err = PTR_ERR(pmbe);
goto out;
@@ -272,6 +279,7 @@
} while (pmbe);
}
+#ifdef CONFIG_PMB
int __uses_jump_to_uncached pmb_init(void)
{
unsigned int i;
@@ -309,6 +317,53 @@
return 0;
}
+#else
+int __uses_jump_to_uncached pmb_init(void)
+{
+ int i;
+ unsigned long addr, data;
+
+ jump_to_uncached();
+
+ for (i = 0; i < PMB_ENTRY_MAX; i++) {
+ struct pmb_entry *pmbe;
+ unsigned long vpn, ppn, flags;
+
+ addr = PMB_DATA + (i << PMB_E_SHIFT);
+ data = ctrl_inl(addr);
+ if (!(data & PMB_V))
+ continue;
+
+ if (data & PMB_C) {
+#if defined(CONFIG_CACHE_WRITETHROUGH)
+ data |= PMB_WT;
+#elif defined(CONFIG_CACHE_WRITEBACK)
+ data &= ~PMB_WT;
+#else
+ data &= ~(PMB_C | PMB_WT);
+#endif
+ }
+ ctrl_outl(data, addr);
+
+ ppn = data & PMB_PFN_MASK;
+
+ flags = data & (PMB_C | PMB_WT | PMB_UB);
+ flags |= data & PMB_SZ_MASK;
+
+ addr = PMB_ADDR + (i << PMB_E_SHIFT);
+ data = ctrl_inl(addr);
+
+ vpn = data & PMB_PFN_MASK;
+
+ pmbe = pmb_alloc(vpn, ppn, flags, i);
+ WARN_ON(IS_ERR(pmbe));
+ }
+
+ back_to_cached();
+
+ return 0;
+}
+#endif /* CONFIG_PMB */
static int pmb_seq_show(struct seq_file *file, void *iter)
{