1 files changed, 61 insertions, 1 deletions

diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 9f6ca624892d..63a7b9bafaff 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -1425,6 +1425,50 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
 }
 #endif
 
+static void __init prom_probe_memory(void)
+{
+        struct linux_mlist_p1275 *mlist;
+        unsigned long bytes, base_paddr, tally;
+        int i;
+
+        i = 0;
+        mlist = *prom_meminfo()->p1275_available;
+        bytes = tally = mlist->num_bytes;
+        base_paddr = mlist->start_adr;
+  
+        sp_banks[0].base_addr = base_paddr;
+        sp_banks[0].num_bytes = bytes;
+
+        while (mlist->theres_more != (void *) 0) {
+                i++;
+                mlist = mlist->theres_more;
+                bytes = mlist->num_bytes;
+                tally += bytes;
+                if (i >= SPARC_PHYS_BANKS-1) {
+                        printk ("The machine has more banks than "
+                                "this kernel can support\n"
+                                "Increase the SPARC_PHYS_BANKS "
+                                "setting (currently %d)\n",
+                                SPARC_PHYS_BANKS);
+                        i = SPARC_PHYS_BANKS-1;
+                        break;
+                }
+    
+                sp_banks[i].base_addr = mlist->start_adr;
+                sp_banks[i].num_bytes = mlist->num_bytes;
+        }
+
+        i++;
+        sp_banks[i].base_addr = 0xdeadbeefbeefdeadUL;
+        sp_banks[i].num_bytes = 0;
+
+        /* Now mask all bank sizes on a page boundary, it is all we can
+         * use anyways.
+         */
+        for (i = 0; sp_banks[i].num_bytes != 0; i++)
+                sp_banks[i].num_bytes &= PAGE_MASK;
+}
+
 /* paging_init() sets up the page tables */
 
 extern void cheetah_ecache_flush_init(void);
@@ -1435,7 +1479,23 @@ pgd_t swapper_pg_dir[2048];
 void __init paging_init(void)
 {
         unsigned long end_pfn, pages_avail, shift;
-        unsigned long real_end;
+        unsigned long real_end, i;
+
+        prom_probe_memory();
+
+        phys_base = 0xffffffffffffffffUL;
+        for (i = 0; sp_banks[i].num_bytes != 0; i++) {
+                unsigned long top;
+
+                if (sp_banks[i].base_addr < phys_base)
+                        phys_base = sp_banks[i].base_addr;
+                top = sp_banks[i].base_addr +
+                        sp_banks[i].num_bytes;
+        }
+        pfn_base = phys_base >> PAGE_SHIFT;
+
+        kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
+        kern_size = (unsigned long)&_end - (unsigned long)KERNBASE;
 
         set_bit(0, mmu_context_bmap);