aboutsummaryrefslogtreecommitdiff
path: root/arch/sparc64/mm/init.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sparc64/mm/init.c')
-rw-r--r--arch/sparc64/mm/init.c109
1 files changed, 106 insertions, 3 deletions
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index cf747372f0c..8d72f8a1268 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -1332,15 +1332,114 @@ unsigned long __init bootmem_init(unsigned long *pages_avail)
return end_pfn;
}
+#ifdef CONFIG_DEBUG_PAGEALLOC
+static unsigned long kernel_map_range(unsigned long pstart, unsigned long pend, pgprot_t prot)
+{
+ unsigned long vstart = PAGE_OFFSET + pstart;
+ unsigned long vend = PAGE_OFFSET + pend;
+ unsigned long alloc_bytes = 0UL;
+
+ if ((vstart & ~PAGE_MASK) || (vend & ~PAGE_MASK)) {
+ prom_printf("kernel_map: Unaligned sp_banks[%lx:%lx]\n",
+ vstart, vend);
+ prom_halt();
+ }
+
+ while (vstart < vend) {
+ unsigned long this_end, paddr = __pa(vstart);
+ pgd_t *pgd = pgd_offset_k(vstart);
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t *pte;
+
+ pud = pud_offset(pgd, vstart);
+ if (pud_none(*pud)) {
+ pmd_t *new;
+
+ new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
+ alloc_bytes += PAGE_SIZE;
+ pud_populate(&init_mm, pud, new);
+ }
+
+ pmd = pmd_offset(pud, vstart);
+ if (!pmd_present(*pmd)) {
+ pte_t *new;
+
+ new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
+ alloc_bytes += PAGE_SIZE;
+ pmd_populate_kernel(&init_mm, pmd, new);
+ }
+
+ pte = pte_offset_kernel(pmd, vstart);
+ this_end = (vstart + PMD_SIZE) & PMD_MASK;
+ if (this_end > vend)
+ this_end = vend;
+
+ while (vstart < this_end) {
+ pte_val(*pte) = (paddr | pgprot_val(prot));
+
+ vstart += PAGE_SIZE;
+ paddr += PAGE_SIZE;
+ pte++;
+ }
+ }
+
+ return alloc_bytes;
+}
+
+extern struct linux_mlist_p1275 *prom_ptot_ptr;
+extern unsigned int kvmap_linear_patch[1];
+
+static void __init kernel_physical_mapping_init(void)
+{
+ struct linux_mlist_p1275 *p = prom_ptot_ptr;
+ unsigned long mem_alloced = 0UL;
+
+ while (p) {
+ unsigned long phys_start, phys_end;
+
+ phys_start = p->start_adr;
+ phys_end = phys_start + p->num_bytes;
+ mem_alloced += kernel_map_range(phys_start, phys_end,
+ PAGE_KERNEL);
+
+ p = p->theres_more;
+ }
+
+ printk("Allocated %ld bytes for kernel page tables.\n",
+ mem_alloced);
+
+ kvmap_linear_patch[0] = 0x01000000; /* nop */
+ flushi(&kvmap_linear_patch[0]);
+
+ __flush_tlb_all();
+}
+
+void kernel_map_pages(struct page *page, int numpages, int enable)
+{
+ unsigned long phys_start = page_to_pfn(page) << PAGE_SHIFT;
+ unsigned long phys_end = phys_start + (numpages * PAGE_SIZE);
+
+ kernel_map_range(phys_start, phys_end,
+ (enable ? PAGE_KERNEL : __pgprot(0)));
+
+ /* we should perform an IPI and flush all tlbs,
+ * but that can deadlock->flush only current cpu.
+ */
+ __flush_tlb_kernel_range(PAGE_OFFSET + phys_start,
+ PAGE_OFFSET + phys_end);
+}
+#endif
+
/* paging_init() sets up the page tables */
extern void cheetah_ecache_flush_init(void);
static unsigned long last_valid_pfn;
+pgd_t swapper_pg_dir[2048];
void __init paging_init(void)
{
- extern pmd_t swapper_pmd_dir[1024];
unsigned long end_pfn, pages_avail, shift;
unsigned long real_end;
@@ -1361,11 +1460,11 @@ void __init paging_init(void)
*/
init_mm.pgd += ((shift) / (sizeof(pgd_t)));
- memset(swapper_pmd_dir, 0, sizeof(swapper_pmd_dir));
+ memset(swapper_low_pmd_dir, 0, sizeof(swapper_low_pmd_dir));
/* Now can init the kernel/bad page tables. */
pud_set(pud_offset(&swapper_pg_dir[0], 0),
- swapper_pmd_dir + (shift / sizeof(pgd_t)));
+ swapper_low_pmd_dir + (shift / sizeof(pgd_t)));
swapper_pgd_zero = pgd_val(swapper_pg_dir[0]);
@@ -1390,6 +1489,10 @@ void __init paging_init(void)
pages_avail = 0;
last_valid_pfn = end_pfn = bootmem_init(&pages_avail);
+#ifdef CONFIG_DEBUG_PAGEALLOC
+ kernel_physical_mapping_init();
+#endif
+
{
unsigned long zones_size[MAX_NR_ZONES];
unsigned long zholes_size[MAX_NR_ZONES];