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path: root/arch/m68k/mm/mcfmmu.c
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Diffstat (limited to 'arch/m68k/mm/mcfmmu.c')
-rw-r--r--arch/m68k/mm/mcfmmu.c126
1 files changed, 83 insertions, 43 deletions
diff --git a/arch/m68k/mm/mcfmmu.c b/arch/m68k/mm/mcfmmu.c
index eac9dde65193..19a75029036c 100644
--- a/arch/m68k/mm/mcfmmu.c
+++ b/arch/m68k/mm/mcfmmu.c
@@ -38,26 +38,19 @@ void __init paging_init(void)
pgd_t *pg_dir;
pte_t *pg_table;
unsigned long address, size;
- unsigned long next_pgtable, bootmem_end;
+ unsigned long next_pgtable;
unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
int i;
- empty_zero_page = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
- if (!empty_zero_page)
- panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
- __func__, PAGE_SIZE, PAGE_SIZE);
+ empty_zero_page = memblock_alloc_or_panic(PAGE_SIZE, PAGE_SIZE);
pg_dir = swapper_pg_dir;
memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir));
size = num_pages * sizeof(pte_t);
size = (size + PAGE_SIZE) & ~(PAGE_SIZE-1);
- next_pgtable = (unsigned long) memblock_alloc(size, PAGE_SIZE);
- if (!next_pgtable)
- panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
- __func__, size, PAGE_SIZE);
+ next_pgtable = (unsigned long) memblock_alloc_or_panic(size, PAGE_SIZE);
- bootmem_end = (next_pgtable + size + PAGE_SIZE) & PAGE_MASK;
pg_dir += PAGE_OFFSET >> PGDIR_SHIFT;
address = PAGE_OFFSET;
@@ -69,7 +62,8 @@ void __init paging_init(void)
/* now change pg_table to kernel virtual addresses */
for (i = 0; i < PTRS_PER_PTE; ++i, ++pg_table) {
- pte_t pte = pfn_pte(virt_to_pfn(address), PAGE_INIT);
+ pte_t pte = pfn_pte(virt_to_pfn((void *)address),
+ PAGE_INIT);
if (address >= (unsigned long) high_memory)
pte_val(pte) = 0;
@@ -91,7 +85,8 @@ int cf_tlb_miss(struct pt_regs *regs, int write, int dtlb, int extension_word)
p4d_t *p4d;
pud_t *pud;
pmd_t *pmd;
- pte_t *pte;
+ pte_t *pte = NULL;
+ int ret = -1;
int asid;
local_irq_save(flags);
@@ -100,47 +95,33 @@ int cf_tlb_miss(struct pt_regs *regs, int write, int dtlb, int extension_word)
regs->pc + (extension_word * sizeof(long));
mm = (!user_mode(regs) && KMAPAREA(mmuar)) ? &init_mm : current->mm;
- if (!mm) {
- local_irq_restore(flags);
- return -1;
- }
+ if (!mm)
+ goto out;
pgd = pgd_offset(mm, mmuar);
- if (pgd_none(*pgd)) {
- local_irq_restore(flags);
- return -1;
- }
+ if (pgd_none(*pgd))
+ goto out;
p4d = p4d_offset(pgd, mmuar);
- if (p4d_none(*p4d)) {
- local_irq_restore(flags);
- return -1;
- }
+ if (p4d_none(*p4d))
+ goto out;
pud = pud_offset(p4d, mmuar);
- if (pud_none(*pud)) {
- local_irq_restore(flags);
- return -1;
- }
+ if (pud_none(*pud))
+ goto out;
pmd = pmd_offset(pud, mmuar);
- if (pmd_none(*pmd)) {
- local_irq_restore(flags);
- return -1;
- }
+ if (pmd_none(*pmd))
+ goto out;
pte = (KMAPAREA(mmuar)) ? pte_offset_kernel(pmd, mmuar)
: pte_offset_map(pmd, mmuar);
- if (pte_none(*pte) || !pte_present(*pte)) {
- local_irq_restore(flags);
- return -1;
- }
+ if (!pte || pte_none(*pte) || !pte_present(*pte))
+ goto out;
if (write) {
- if (!pte_write(*pte)) {
- local_irq_restore(flags);
- return -1;
- }
+ if (!pte_write(*pte))
+ goto out;
set_pte(pte, pte_mkdirty(*pte));
}
@@ -161,9 +142,12 @@ int cf_tlb_miss(struct pt_regs *regs, int write, int dtlb, int extension_word)
mmu_write(MMUOR, MMUOR_ACC | MMUOR_UAA);
else
mmu_write(MMUOR, MMUOR_ITLB | MMUOR_ACC | MMUOR_UAA);
-
+ ret = 0;
+out:
+ if (pte && !KMAPAREA(mmuar))
+ pte_unmap(pte);
local_irq_restore(flags);
- return 0;
+ return ret;
}
void __init cf_bootmem_alloc(void)
@@ -174,7 +158,8 @@ void __init cf_bootmem_alloc(void)
m68k_memory[0].addr = _rambase;
m68k_memory[0].size = _ramend - _rambase;
- memblock_add_node(m68k_memory[0].addr, m68k_memory[0].size, 0);
+ memblock_add_node(m68k_memory[0].addr, m68k_memory[0].size, 0,
+ MEMBLOCK_NONE);
/* compute total pages in system */
num_pages = PFN_DOWN(_ramend - _rambase);
@@ -233,3 +218,58 @@ void steal_context(void)
destroy_context(mm);
}
+static const pgprot_t protection_map[16] = {
+ [VM_NONE] = PAGE_NONE,
+ [VM_READ] = __pgprot(CF_PAGE_VALID |
+ CF_PAGE_ACCESSED |
+ CF_PAGE_READABLE),
+ [VM_WRITE] = __pgprot(CF_PAGE_VALID |
+ CF_PAGE_ACCESSED |
+ CF_PAGE_WRITABLE),
+ [VM_WRITE | VM_READ] = __pgprot(CF_PAGE_VALID |
+ CF_PAGE_ACCESSED |
+ CF_PAGE_READABLE |
+ CF_PAGE_WRITABLE),
+ [VM_EXEC] = __pgprot(CF_PAGE_VALID |
+ CF_PAGE_ACCESSED |
+ CF_PAGE_EXEC),
+ [VM_EXEC | VM_READ] = __pgprot(CF_PAGE_VALID |
+ CF_PAGE_ACCESSED |
+ CF_PAGE_READABLE |
+ CF_PAGE_EXEC),
+ [VM_EXEC | VM_WRITE] = __pgprot(CF_PAGE_VALID |
+ CF_PAGE_ACCESSED |
+ CF_PAGE_WRITABLE |
+ CF_PAGE_EXEC),
+ [VM_EXEC | VM_WRITE | VM_READ] = __pgprot(CF_PAGE_VALID |
+ CF_PAGE_ACCESSED |
+ CF_PAGE_READABLE |
+ CF_PAGE_WRITABLE |
+ CF_PAGE_EXEC),
+ [VM_SHARED] = PAGE_NONE,
+ [VM_SHARED | VM_READ] = __pgprot(CF_PAGE_VALID |
+ CF_PAGE_ACCESSED |
+ CF_PAGE_READABLE),
+ [VM_SHARED | VM_WRITE] = PAGE_SHARED,
+ [VM_SHARED | VM_WRITE | VM_READ] = __pgprot(CF_PAGE_VALID |
+ CF_PAGE_ACCESSED |
+ CF_PAGE_READABLE |
+ CF_PAGE_SHARED),
+ [VM_SHARED | VM_EXEC] = __pgprot(CF_PAGE_VALID |
+ CF_PAGE_ACCESSED |
+ CF_PAGE_EXEC),
+ [VM_SHARED | VM_EXEC | VM_READ] = __pgprot(CF_PAGE_VALID |
+ CF_PAGE_ACCESSED |
+ CF_PAGE_READABLE |
+ CF_PAGE_EXEC),
+ [VM_SHARED | VM_EXEC | VM_WRITE] = __pgprot(CF_PAGE_VALID |
+ CF_PAGE_ACCESSED |
+ CF_PAGE_SHARED |
+ CF_PAGE_EXEC),
+ [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = __pgprot(CF_PAGE_VALID |
+ CF_PAGE_ACCESSED |
+ CF_PAGE_READABLE |
+ CF_PAGE_SHARED |
+ CF_PAGE_EXEC)
+};
+DECLARE_VM_GET_PAGE_PROT
generated by cgit (git 2.34.1) at 2025-12-25 04:21:42 +0000