/*
* paging_init() sets up the page tables - in fact we've already done this.
*/
static void __init paging_init(void)
{
int i;
unsigned long zones_size[MAX_NR_ZONES];
/*
* old: we can DMA to/from any address.put all page into ZONE_DMA
* We use only ZONE_NORMAL
*/
zones_size[ZONE_NORMAL] = max_mapnr;
/* every other zones are empty */
for (i = 1; i < MAX_NR_ZONES; i++)
zones_size[i] = 0;
free_area_init(zones_size);
}
/*
* paging_init() continues the virtual memory environment setup which
* was begun by the code in arch/head.S.
* The parameters are pointers to where to stick the starting and ending
* addresses of available kernel virtual memory.
*/
void __init paging_init(void)
{
/*
* Make sure start_mem is page aligned, otherwise bootmem and
* page_alloc get different views of the world.
*/
#ifdef DEBUG
unsigned long start_mem = PAGE_ALIGN(memory_start);
#endif
unsigned long end_mem = memory_end & PAGE_MASK;
#ifdef DEBUG
printk (KERN_DEBUG "start_mem is %#lx\nvirtual_end is %#lx\n",
start_mem, end_mem);
#endif
/*
* Initialize the bad page table and bad page to point
* to a couple of allocated pages.
*/
empty_bad_page_table = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
empty_bad_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
empty_zero_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
memset((void *)empty_zero_page, 0, PAGE_SIZE);
/*
* Set up SFC/DFC registers (user data space).
*/
set_fs (USER_DS);
#ifdef DEBUG
printk (KERN_DEBUG "before free_area_init\n");
printk (KERN_DEBUG "free_area_init -> start_mem is %#lx\nvirtual_end is %#lx\n",
start_mem, end_mem);
#endif
{
unsigned long zones_size[MAX_NR_ZONES] = {0, };
zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
free_area_init(zones_size);
}
}
/*
* paging_init() continues the virtual memory environment setup which
* was begun by the code in arch/head.S.
* The parameters are pointers to where to stick the starting and ending
* addresses of available kernel virtual memory.
*/
void __init paging_init(void)
{
unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 0};
/* allocate some pages for kernel housekeeping tasks */
empty_bad_page_table = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
empty_bad_page = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
empty_zero_page = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
memset((void *) empty_zero_page, 0, PAGE_SIZE);
#if CONFIG_HIGHMEM
if (num_physpages - num_mappedpages) {
pgd_t *pge;
pud_t *pue;
pmd_t *pme;
pkmap_page_table = alloc_bootmem_pages(PAGE_SIZE);
memset(pkmap_page_table, 0, PAGE_SIZE);
pge = swapper_pg_dir + pgd_index_k(PKMAP_BASE);
pue = pud_offset(pge, PKMAP_BASE);
pme = pmd_offset(pue, PKMAP_BASE);
__set_pmd(pme, virt_to_phys(pkmap_page_table) | _PAGE_TABLE);
}
#endif
/* distribute the allocatable pages across the various zones and pass them to the allocator
*/
zones_size[ZONE_DMA] = max_low_pfn - min_low_pfn;
zones_size[ZONE_NORMAL] = 0;
#ifdef CONFIG_HIGHMEM
zones_size[ZONE_HIGHMEM] = num_physpages - num_mappedpages;
#endif
free_area_init(zones_size);
#ifdef CONFIG_MMU
/* initialise init's MMU context */
init_new_context(&init_task, &init_mm);
#endif
} /* end paging_init() */
/*
* paging_init() continues the virtual memory environment setup which
* was begun by the code in arch/head.S.
* The parameters are pointers to where to stick the starting and ending
* addresses of available kernel virtual memory.
*/
void __init paging_init(void)
{
/*
* Make sure start_mem is page aligned, otherwise bootmem and
* page_alloc get different views of the world.
*/
unsigned long end_mem = memory_end & PAGE_MASK;
unsigned long zones_size[MAX_NR_ZONES] = {0, };
empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
memset(empty_zero_page, 0, PAGE_SIZE);
/*
* Set up SFC/DFC registers (user data space).
*/
set_fs (USER_DS);
zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
free_area_init(zones_size);
}
/*
* paging_init() continues the virtual memory environment setup which
* was begun by the code in arch/head.S.
* The parameters are pointers to where to stick the starting and ending
* addresses of available kernel virtual memory.
*/
void __init paging_init(void)
{
struct pglist_data *pgdat = NODE_DATA(0);
unsigned long zones_size[MAX_NR_ZONES] = {0, };
empty_zero_page = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
memset((void *)empty_zero_page, 0, PAGE_SIZE);
/*
* Set up user data space
*/
set_fs(KERNEL_DS);
/*
* Define zones
*/
zones_size[ZONE_NORMAL] = (memory_end - PAGE_OFFSET) >> PAGE_SHIFT;
pgdat->node_zones[ZONE_NORMAL].zone_start_pfn =
__pa(PAGE_OFFSET) >> PAGE_SHIFT;
free_area_init(zones_size);
}
/*
* paging_init() continues the virtual memory environment setup which
* was begun by the code in arch/head.S.
* The parameters are pointers to where to stick the starting and ending
* addresses of available kernel virtual memory.
*/
void __init paging_init(void)
{
/*
* Make sure start_mem is page aligned, otherwise bootmem and
* page_alloc get different views og the world.
*/
unsigned long start_mem = PAGE_ALIGN(memory_start);
unsigned long end_mem = memory_end & PAGE_MASK;
pr_debug("start_mem is %#lx\nvirtual_end is %#lx\n",
start_mem, end_mem);
/*
* Initialize the bad page table and bad page to point
* to a couple of allocated pages.
*/
empty_zero_page = (unsigned long)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);
/*
* Set up SFC/DFC registers (user data space).
*/
set_fs(USER_DS);
pr_debug("before free_area_init\n");
pr_debug("free_area_init -> start_mem is %#lx\nvirtual_end is %#lx\n",
start_mem, end_mem);
{
unsigned long zones_size[MAX_NR_ZONES] = {0, };
zones_size[ZONE_NORMAL] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
free_area_init(zones_size);
}
}
/*
* paging_init() continues the virtual memory environment setup which
* was begun by the code in arch/head.S.
* The parameters are pointers to where to stick the starting and ending
* addresses of available kernel virtual memory.
*/
void __init paging_init(void)
{
/*
* Make sure start_mem is page aligned, otherwise bootmem and
* page_alloc get different views of the world.
*/
#ifdef DEBUG
unsigned long start_mem = PAGE_ALIGN(memory_start);
#endif
unsigned long end_mem = memory_end & PAGE_MASK;
#ifdef DEBUG
printk ("start_mem is %#lx\nvirtual_end is %#lx\n",
start_mem, end_mem);
#endif
set_fs(KERNEL_DS);
#ifdef DEBUG
printk ("before free_area_init\n");
printk ("free_area_init -> start_mem is %#lx\nvirtual_end is %#lx\n",
start_mem, end_mem);
#endif
{
unsigned i;
unsigned long zones_size[MAX_NR_ZONES];
for (i = 0; i < MAX_NR_ZONES; i++)
zones_size[i] = 0;
zones_size[ZONE_NORMAL] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
free_area_init(zones_size);
}
printk ("after free_area_init\n");
}
unsigned long paging_init(unsigned long start_mem, unsigned long end_mem)
{
return free_area_init(start_mem, end_mem);
}
/* now sets up tables using sun3 PTEs rather than i386 as before. --m */
void __init paging_init(void)
{
pgd_t * pg_dir;
pte_t * pg_table;
int i;
unsigned long address;
unsigned long next_pgtable;
unsigned long bootmem_end;
unsigned long zones_size[3] = {0, 0, 0};
unsigned long size;
#ifdef TEST_VERIFY_AREA
wp_works_ok = 0;
#endif
empty_bad_page_table = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
empty_bad_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
empty_zero_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
memset((void *)empty_zero_page, 0, PAGE_SIZE);
address = PAGE_OFFSET;
pg_dir = swapper_pg_dir;
memset (swapper_pg_dir, 0, sizeof (swapper_pg_dir));
memset (kernel_pg_dir, 0, sizeof (kernel_pg_dir));
size = num_pages * sizeof(pte_t);
size = (size + PAGE_SIZE) & ~(PAGE_SIZE-1);
next_pgtable = (unsigned long)alloc_bootmem_pages(size);
bootmem_end = (next_pgtable + size + PAGE_SIZE) & PAGE_MASK;
/* Map whole memory from PAGE_OFFSET (0x0E000000) */
pg_dir += PAGE_OFFSET >> PGDIR_SHIFT;
while (address < (unsigned long)high_memory) {
pg_table = (pte_t *) __pa (next_pgtable);
next_pgtable += PTRS_PER_PTE * sizeof (pte_t);
pgd_val(*pg_dir) = (unsigned long) pg_table;
pg_dir++;
/* now change pg_table to kernel virtual addresses */
pg_table = (pte_t *) __va ((unsigned long) pg_table);
for (i=0; i<PTRS_PER_PTE; ++i, ++pg_table) {
pte_t pte = __mk_pte(address, PAGE_INIT);
if (address >= (unsigned long)high_memory)
pte_val (pte) = 0;
set_pte (pg_table, pte);
address += PAGE_SIZE;
}
}
mmu_emu_init(bootmem_end);
current->mm = NULL;
/* memory sizing is a hack stolen from motorola.c.. hope it works for us */
zones_size[0] = ((unsigned long)high_memory - PAGE_OFFSET) >> PAGE_SHIFT;
zones_size[1] = 0;
free_area_init(zones_size);
}