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Diffstat (limited to 'arch/microblaze/mm/init.c')
-rw-r--r--arch/microblaze/mm/init.c151
1 files changed, 32 insertions, 119 deletions
diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index 050fc621c920..3827dc76edd8 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -7,11 +7,13 @@
* for more details.
*/
+#include <linux/dma-map-ops.h>
#include <linux/memblock.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h> /* mem_init */
#include <linux/initrd.h>
+#include <linux/of_fdt.h>
#include <linux/pagemap.h>
#include <linux/pfn.h>
#include <linux/slab.h>
@@ -28,11 +30,6 @@
/* Use for MMU and noMMU because of PCI generic code */
int mem_init_done;
-#ifndef CONFIG_MMU
-unsigned int __page_offset;
-EXPORT_SYMBOL(__page_offset);
-#endif /* CONFIG_MMU */
-
char *klimit = _end;
/*
@@ -45,32 +42,18 @@ unsigned long memory_size;
EXPORT_SYMBOL(memory_size);
unsigned long lowmem_size;
-#ifdef CONFIG_HIGHMEM
-pte_t *kmap_pte;
-EXPORT_SYMBOL(kmap_pte);
-pgprot_t kmap_prot;
-EXPORT_SYMBOL(kmap_prot);
-
-static inline pte_t *virt_to_kpte(unsigned long vaddr)
-{
- pgd_t *pgd = pgd_offset_k(vaddr);
- p4d_t *p4d = p4d_offset(pgd, vaddr);
- pud_t *pud = pud_offset(p4d, vaddr);
-
- return pte_offset_kernel(pmd_offset(pud, vaddr), vaddr);
-}
+EXPORT_SYMBOL(min_low_pfn);
+EXPORT_SYMBOL(max_low_pfn);
+#ifdef CONFIG_HIGHMEM
static void __init highmem_init(void)
{
pr_debug("%x\n", (u32)PKMAP_BASE);
map_page(PKMAP_BASE, 0, 0); /* XXX gross */
pkmap_page_table = virt_to_kpte(PKMAP_BASE);
-
- kmap_pte = virt_to_kpte(__fix_to_virt(FIX_KMAP_BEGIN));
- kmap_prot = PAGE_KERNEL;
}
-static void highmem_setup(void)
+static void __meminit highmem_setup(void)
{
unsigned long pfn;
@@ -90,13 +73,11 @@ static void highmem_setup(void)
static void __init paging_init(void)
{
unsigned long zones_size[MAX_NR_ZONES];
-#ifdef CONFIG_MMU
int idx;
/* Setup fixmaps */
for (idx = 0; idx < __end_of_fixed_addresses; idx++)
clear_fixmap(idx);
-#endif
/* Clean every zones */
memset(zones_size, 0, sizeof(zones_size));
@@ -111,45 +92,11 @@ static void __init paging_init(void)
#endif
/* We don't have holes in memory map */
- free_area_init_nodes(zones_size);
+ free_area_init(zones_size);
}
void __init setup_memory(void)
{
- struct memblock_region *reg;
-
-#ifndef CONFIG_MMU
- u32 kernel_align_start, kernel_align_size;
-
- /* Find main memory where is the kernel */
- for_each_memblock(memory, reg) {
- memory_start = (u32)reg->base;
- lowmem_size = reg->size;
- if ((memory_start <= (u32)_text) &&
- ((u32)_text <= (memory_start + lowmem_size - 1))) {
- memory_size = lowmem_size;
- PAGE_OFFSET = memory_start;
- pr_info("%s: Main mem: 0x%x, size 0x%08x\n",
- __func__, (u32) memory_start,
- (u32) memory_size);
- break;
- }
- }
-
- if (!memory_start || !memory_size) {
- panic("%s: Missing memory setting 0x%08x, size=0x%08x\n",
- __func__, (u32) memory_start, (u32) memory_size);
- }
-
- /* reservation of region where is the kernel */
- kernel_align_start = PAGE_DOWN((u32)_text);
- /* ALIGN can be remove because _end in vmlinux.lds.S is align */
- kernel_align_size = PAGE_UP((u32)klimit) - kernel_align_start;
- pr_info("%s: kernel addr:0x%08x-0x%08x size=0x%08x\n",
- __func__, kernel_align_start, kernel_align_start
- + kernel_align_size, kernel_align_size);
- memblock_reserve(kernel_align_start, kernel_align_size);
-#endif
/*
* Kernel:
* start: base phys address of kernel - page align
@@ -172,20 +119,6 @@ void __init setup_memory(void)
pr_info("%s: max_low_pfn: %#lx\n", __func__, max_low_pfn);
pr_info("%s: max_pfn: %#lx\n", __func__, max_pfn);
- /* Add active regions with valid PFNs */
- for_each_memblock(memory, reg) {
- unsigned long start_pfn, end_pfn;
-
- start_pfn = memblock_region_memory_base_pfn(reg);
- end_pfn = memblock_region_memory_end_pfn(reg);
- memblock_set_node(start_pfn << PAGE_SHIFT,
- (end_pfn - start_pfn) << PAGE_SHIFT,
- &memblock.memory, 0);
- }
-
- /* XXX need to clip this if using highmem? */
- sparse_memory_present_with_active_regions(0);
-
paging_init();
}
@@ -199,28 +132,9 @@ void __init mem_init(void)
highmem_setup();
#endif
- mem_init_print_info(NULL);
-#ifdef CONFIG_MMU
- pr_info("Kernel virtual memory layout:\n");
- pr_info(" * 0x%08lx..0x%08lx : fixmap\n", FIXADDR_START, FIXADDR_TOP);
-#ifdef CONFIG_HIGHMEM
- pr_info(" * 0x%08lx..0x%08lx : highmem PTEs\n",
- PKMAP_BASE, PKMAP_ADDR(LAST_PKMAP));
-#endif /* CONFIG_HIGHMEM */
- pr_info(" * 0x%08lx..0x%08lx : early ioremap\n",
- ioremap_bot, ioremap_base);
- pr_info(" * 0x%08lx..0x%08lx : vmalloc & ioremap\n",
- (unsigned long)VMALLOC_START, VMALLOC_END);
-#endif
mem_init_done = 1;
}
-#ifndef CONFIG_MMU
-int page_is_ram(unsigned long pfn)
-{
- return __range_ok(pfn, 0);
-}
-#else
int page_is_ram(unsigned long pfn)
{
return pfn < max_low_pfn;
@@ -345,34 +259,33 @@ asmlinkage void __init mmu_init(void)
/* This will also cause that unflatten device tree will be allocated
* inside 768MB limit */
memblock_set_current_limit(memory_start + lowmem_size - 1);
-}
-/* This is only called until mem_init is done. */
-void __init *early_get_page(void)
-{
- /*
- * Mem start + kernel_tlb -> here is limit
- * because of mem mapping from head.S
- */
- return memblock_alloc_try_nid_raw(PAGE_SIZE, PAGE_SIZE,
- MEMBLOCK_LOW_LIMIT, memory_start + kernel_tlb,
- NUMA_NO_NODE);
-}
+ parse_early_param();
-#endif /* CONFIG_MMU */
+ early_init_fdt_scan_reserved_mem();
-void * __ref zalloc_maybe_bootmem(size_t size, gfp_t mask)
-{
- void *p;
-
- if (mem_init_done) {
- p = kzalloc(size, mask);
- } else {
- p = memblock_alloc(size, SMP_CACHE_BYTES);
- if (!p)
- panic("%s: Failed to allocate %zu bytes\n",
- __func__, size);
- }
+ /* CMA initialization */
+ dma_contiguous_reserve(memory_start + lowmem_size - 1);
- return p;
+ memblock_dump_all();
}
+
+static const pgprot_t protection_map[16] = {
+ [VM_NONE] = PAGE_NONE,
+ [VM_READ] = PAGE_READONLY_X,
+ [VM_WRITE] = PAGE_COPY,
+ [VM_WRITE | VM_READ] = PAGE_COPY_X,
+ [VM_EXEC] = PAGE_READONLY,
+ [VM_EXEC | VM_READ] = PAGE_READONLY_X,
+ [VM_EXEC | VM_WRITE] = PAGE_COPY,
+ [VM_EXEC | VM_WRITE | VM_READ] = PAGE_COPY_X,
+ [VM_SHARED] = PAGE_NONE,
+ [VM_SHARED | VM_READ] = PAGE_READONLY_X,
+ [VM_SHARED | VM_WRITE] = PAGE_SHARED,
+ [VM_SHARED | VM_WRITE | VM_READ] = PAGE_SHARED_X,
+ [VM_SHARED | VM_EXEC] = PAGE_READONLY,
+ [VM_SHARED | VM_EXEC | VM_READ] = PAGE_READONLY_X,
+ [VM_SHARED | VM_EXEC | VM_WRITE] = PAGE_SHARED,
+ [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = PAGE_SHARED_X
+};
+DECLARE_VM_GET_PAGE_PROT
generated by cgit (git 2.34.1) at 2024-04-23 07:33:00 +0000