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Diffstat (limited to 'arch/m68k/mm/kmap.c')
-rw-r--r--arch/m68k/mm/kmap.c131
1 files changed, 75 insertions, 56 deletions
diff --git a/arch/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c
index 40a3b327da07..120030ad8dc4 100644
--- a/arch/m68k/mm/kmap.c
+++ b/arch/m68k/mm/kmap.c
@@ -54,6 +54,61 @@ static inline void free_io_area(void *addr)
static struct vm_struct *iolist;
+/*
+ * __free_io_area unmaps nearly everything, so be careful
+ * Currently it doesn't free pointer/page tables anymore but this
+ * wasn't used anyway and might be added later.
+ */
+static void __free_io_area(void *addr, unsigned long size)
+{
+ unsigned long virtaddr = (unsigned long)addr;
+ pgd_t *pgd_dir;
+ p4d_t *p4d_dir;
+ pud_t *pud_dir;
+ pmd_t *pmd_dir;
+ pte_t *pte_dir;
+
+ while ((long)size > 0) {
+ pgd_dir = pgd_offset_k(virtaddr);
+ p4d_dir = p4d_offset(pgd_dir, virtaddr);
+ pud_dir = pud_offset(p4d_dir, virtaddr);
+ if (pud_bad(*pud_dir)) {
+ printk("iounmap: bad pud(%08lx)\n", pud_val(*pud_dir));
+ pud_clear(pud_dir);
+ return;
+ }
+ pmd_dir = pmd_offset(pud_dir, virtaddr);
+
+#if CONFIG_PGTABLE_LEVELS == 3
+ if (CPU_IS_020_OR_030) {
+ int pmd_off = (virtaddr/PTRTREESIZE) & 15;
+ int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK;
+
+ if (pmd_type == _PAGE_PRESENT) {
+ pmd_dir->pmd[pmd_off] = 0;
+ virtaddr += PTRTREESIZE;
+ size -= PTRTREESIZE;
+ continue;
+ } else if (pmd_type == 0)
+ continue;
+ }
+#endif
+
+ if (pmd_bad(*pmd_dir)) {
+ printk("iounmap: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
+ pmd_clear(pmd_dir);
+ return;
+ }
+ pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
+
+ pte_val(*pte_dir) = 0;
+ virtaddr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+
+ flush_tlb_all();
+}
+
static struct vm_struct *get_io_area(unsigned long size)
{
unsigned long addr;
@@ -90,7 +145,7 @@ static inline void free_io_area(void *addr)
if (tmp->addr == addr) {
*p = tmp->next;
/* remove gap added in get_io_area() */
- __iounmap(tmp->addr, tmp->size - IO_SIZE);
+ __free_io_area(tmp->addr, tmp->size - IO_SIZE);
kfree(tmp);
return;
}
@@ -110,6 +165,8 @@ void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cachefla
unsigned long virtaddr, retaddr;
long offset;
pgd_t *pgd_dir;
+ p4d_t *p4d_dir;
+ pud_t *pud_dir;
pmd_t *pmd_dir;
pte_t *pte_dir;
@@ -196,18 +253,23 @@ void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cachefla
printk ("\npa=%#lx va=%#lx ", physaddr, virtaddr);
#endif
pgd_dir = pgd_offset_k(virtaddr);
- pmd_dir = pmd_alloc(&init_mm, pgd_dir, virtaddr);
+ p4d_dir = p4d_offset(pgd_dir, virtaddr);
+ pud_dir = pud_offset(p4d_dir, virtaddr);
+ pmd_dir = pmd_alloc(&init_mm, pud_dir, virtaddr);
if (!pmd_dir) {
printk("ioremap: no mem for pmd_dir\n");
return NULL;
}
+#if CONFIG_PGTABLE_LEVELS == 3
if (CPU_IS_020_OR_030) {
pmd_dir->pmd[(virtaddr/PTRTREESIZE) & 15] = physaddr;
physaddr += PTRTREESIZE;
virtaddr += PTRTREESIZE;
size -= PTRTREESIZE;
- } else {
+ } else
+#endif
+ {
pte_dir = pte_alloc_kernel(pmd_dir, virtaddr);
if (!pte_dir) {
printk("ioremap: no mem for pte_dir\n");
@@ -250,55 +312,6 @@ void iounmap(void __iomem *addr)
EXPORT_SYMBOL(iounmap);
/*
- * __iounmap unmaps nearly everything, so be careful
- * Currently it doesn't free pointer/page tables anymore but this
- * wasn't used anyway and might be added later.
- */
-void __iounmap(void *addr, unsigned long size)
-{
- unsigned long virtaddr = (unsigned long)addr;
- pgd_t *pgd_dir;
- pmd_t *pmd_dir;
- pte_t *pte_dir;
-
- while ((long)size > 0) {
- pgd_dir = pgd_offset_k(virtaddr);
- if (pgd_bad(*pgd_dir)) {
- printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
- pgd_clear(pgd_dir);
- return;
- }
- pmd_dir = pmd_offset(pgd_dir, virtaddr);
-
- if (CPU_IS_020_OR_030) {
- int pmd_off = (virtaddr/PTRTREESIZE) & 15;
- int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK;
-
- if (pmd_type == _PAGE_PRESENT) {
- pmd_dir->pmd[pmd_off] = 0;
- virtaddr += PTRTREESIZE;
- size -= PTRTREESIZE;
- continue;
- } else if (pmd_type == 0)
- continue;
- }
-
- if (pmd_bad(*pmd_dir)) {
- printk("iounmap: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
- pmd_clear(pmd_dir);
- return;
- }
- pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
-
- pte_val(*pte_dir) = 0;
- virtaddr += PAGE_SIZE;
- size -= PAGE_SIZE;
- }
-
- flush_tlb_all();
-}
-
-/*
* Set new cache mode for some kernel address space.
* The caller must push data for that range itself, if such data may already
* be in the cache.
@@ -307,6 +320,8 @@ void kernel_set_cachemode(void *addr, unsigned long size, int cmode)
{
unsigned long virtaddr = (unsigned long)addr;
pgd_t *pgd_dir;
+ p4d_t *p4d_dir;
+ pud_t *pud_dir;
pmd_t *pmd_dir;
pte_t *pte_dir;
@@ -341,13 +356,16 @@ void kernel_set_cachemode(void *addr, unsigned long size, int cmode)
while ((long)size > 0) {
pgd_dir = pgd_offset_k(virtaddr);
- if (pgd_bad(*pgd_dir)) {
- printk("iocachemode: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
- pgd_clear(pgd_dir);
+ p4d_dir = p4d_offset(pgd_dir, virtaddr);
+ pud_dir = pud_offset(p4d_dir, virtaddr);
+ if (pud_bad(*pud_dir)) {
+ printk("iocachemode: bad pud(%08lx)\n", pud_val(*pud_dir));
+ pud_clear(pud_dir);
return;
}
- pmd_dir = pmd_offset(pgd_dir, virtaddr);
+ pmd_dir = pmd_offset(pud_dir, virtaddr);
+#if CONFIG_PGTABLE_LEVELS == 3
if (CPU_IS_020_OR_030) {
int pmd_off = (virtaddr/PTRTREESIZE) & 15;
@@ -359,6 +377,7 @@ void kernel_set_cachemode(void *addr, unsigned long size, int cmode)
continue;
}
}
+#endif
if (pmd_bad(*pmd_dir)) {
printk("iocachemode: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-11-24 02:00:31 +0000