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-rw-r--r--arch/sparc64/kernel/pci_sun4v.c15
-rw-r--r--arch/sparc64/mm/init.c28
-rw-r--r--include/asm-sparc64/pgtable.h2
3 files changed, 39 insertions, 6 deletions
diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c
index b63b2834133..b275c7df018 100644
--- a/arch/sparc64/kernel/pci_sun4v.c
+++ b/arch/sparc64/kernel/pci_sun4v.c
@@ -988,8 +988,13 @@ static unsigned long probe_existing_entries(struct pci_pbm_info *pbm,
HV_PCI_TSBID(0, i),
&io_attrs, &ra);
if (ret == HV_EOK) {
- cnt++;
- __set_bit(i, arena->map);
+ if (page_in_phys_avail(ra)) {
+ pci_sun4v_iommu_demap(devhandle,
+ HV_PCI_TSBID(0, i), 1);
+ } else {
+ cnt++;
+ __set_bit(i, arena->map);
+ }
}
}
@@ -1062,9 +1067,9 @@ static void pci_sun4v_iommu_init(struct pci_pbm_info *pbm)
iommu->arena.limit = num_tsb_entries;
sz = probe_existing_entries(pbm, iommu);
-
- printk("%s: TSB entries [%lu], existing mapings [%lu]\n",
- pbm->name, num_tsb_entries, sz);
+ if (sz)
+ printk("%s: Imported %lu TSB entries from OBP\n",
+ pbm->name, sz);
}
static void pci_sun4v_get_bus_range(struct pci_pbm_info *pbm)
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 9d2b0da590a..51399341474 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -1396,7 +1396,7 @@ static void __init taint_real_pages(void)
while (old_start < old_end) {
int n;
- for (n = 0; pavail_rescan_ents; n++) {
+ for (n = 0; n < pavail_rescan_ents; n++) {
unsigned long new_start, new_end;
new_start = pavail_rescan[n].phys_addr;
@@ -1418,6 +1418,32 @@ static void __init taint_real_pages(void)
}
}
+int __init page_in_phys_avail(unsigned long paddr)
+{
+ int i;
+
+ paddr &= PAGE_MASK;
+
+ for (i = 0; i < pavail_rescan_ents; i++) {
+ unsigned long start, end;
+
+ start = pavail_rescan[i].phys_addr;
+ end = start + pavail_rescan[i].reg_size;
+
+ if (paddr >= start && paddr < end)
+ return 1;
+ }
+ if (paddr >= kern_base && paddr < (kern_base + kern_size))
+ return 1;
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (paddr >= __pa(initrd_start) &&
+ paddr < __pa(PAGE_ALIGN(initrd_end)))
+ return 1;
+#endif
+
+ return 0;
+}
+
void __init mem_init(void)
{
unsigned long codepages, datapages, initpages;
diff --git a/include/asm-sparc64/pgtable.h b/include/asm-sparc64/pgtable.h
index 4e218814bb3..03f5bc9b6be 100644
--- a/include/asm-sparc64/pgtable.h
+++ b/include/asm-sparc64/pgtable.h
@@ -756,6 +756,8 @@ extern unsigned long *sparc64_valid_addr_bitmap;
#define kern_addr_valid(addr) \
(test_bit(__pa((unsigned long)(addr))>>22, sparc64_valid_addr_bitmap))
+extern int page_in_phys_avail(unsigned long paddr);
+
extern int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
unsigned long pfn,
unsigned long size, pgprot_t prot);