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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/m68k/mm/sun3mmu.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/m68k/mm/sun3mmu.c')
-rw-r--r-- | kernel/arch/m68k/mm/sun3mmu.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/kernel/arch/m68k/mm/sun3mmu.c b/kernel/arch/m68k/mm/sun3mmu.c new file mode 100644 index 000000000..269f81158 --- /dev/null +++ b/kernel/arch/m68k/mm/sun3mmu.c @@ -0,0 +1,98 @@ +/* + * linux/arch/m68k/mm/sun3mmu.c + * + * Implementations of mm routines specific to the sun3 MMU. + * + * Moved here 8/20/1999 Sam Creasey + * + */ + +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/swap.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/bootmem.h> + +#include <asm/setup.h> +#include <asm/uaccess.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/machdep.h> +#include <asm/io.h> + +extern void mmu_emu_init (unsigned long bootmem_end); + +const char bad_pmd_string[] = "Bad pmd in pte_alloc: %08lx\n"; + +extern unsigned long num_pages; + +/* For the sun3 we try to follow the i386 paging_init() more closely */ +/* start_mem and end_mem have PAGE_OFFSET added already */ +/* 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[MAX_NR_ZONES] = { 0, }; + unsigned long size; + +#ifdef TEST_VERIFY_AREA + wp_works_ok = 0; +#endif + empty_zero_page = alloc_bootmem_pages(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 = pfn_pte(virt_to_pfn(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[ZONE_DMA] = ((unsigned long)high_memory - PAGE_OFFSET) >> PAGE_SHIFT; + + /* I really wish I knew why the following change made things better... -- Sam */ +/* free_area_init(zones_size); */ + free_area_init_node(0, zones_size, + (__pa(PAGE_OFFSET) >> PAGE_SHIFT) + 1, NULL); + + +} + + |