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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _M68K_PGTABLE_H
#define _M68K_PGTABLE_H

#include <asm-generic/4level-fixup.h>

#include <asm/setup.h>

#ifndef __ASSEMBLY__
#include <asm/processor.h>
#include <linux/sched.h>
#include <linux/threads.h>

/*
 * This file contains the functions and defines necessary to modify and use
 * the m68k page table tree.
 */

#include <asm/virtconvert.h>

/* Certain architectures need to do special things when pte's
 * within a page table are directly modified.  Thus, the following
 * hook is made available.
 */
#define set_pte(pteptr, pteval)					\
	do{							\
		*(pteptr) = (pteval);				\
	} while(0)
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)


/* PMD_SHIFT determines the size of the area a second-level page table can map */
#ifdef CONFIG_SUN3
#define PMD_SHIFT       17
#else
#define PMD_SHIFT	22
#endif
#define PMD_SIZE	(1UL << PMD_SHIFT)
#define PMD_MASK	(~(PMD_SIZE-1))

/* PGDIR_SHIFT determines what a third-level page table entry can map */
#ifdef CONFIG_SUN3
#define PGDIR_SHIFT     17
#elif defined(CONFIG_COLDFIRE)
#define PGDIR_SHIFT     22
#else
#define PGDIR_SHIFT	25
#endif
#define PGDIR_SIZE	(1UL << PGDIR_SHIFT)
#define PGDIR_MASK	(~(PGDIR_SIZE-1))

/*
 * entries per page directory level: the m68k is configured as three-level,
 * so we do have PMD level physically.
 */
#ifdef CONFIG_SUN3
#define PTRS_PER_PTE   16
#define __PAGETABLE_PMD_FOLDED 1
#define PTRS_PER_PMD   1
#define PTRS_PER_PGD   2048
#elif defined(CONFIG_COLDFIRE)
#define PTRS_PER_PTE	512
#define __PAGETABLE_PMD_FOLDED 1
#define PTRS_PER_PMD	1
#define PTRS_PER_PGD	1024
#else
#define PTRS_PER_PTE	1024
#define PTRS_PER_PMD	8
#define PTRS_PER_PGD	128
#endif
#define USER_PTRS_PER_PGD	(TASK_SIZE/PGDIR_SIZE)
#define FIRST_USER_ADDRESS	0UL

/* Virtual address region for use by kernel_map() */
#ifdef CONFIG_SUN3
#define KMAP_START     0x0DC00000
#define KMAP_END       0x0E000000
#elif defined(CONFIG_COLDFIRE)
#define KMAP_START	0xe0000000
#define KMAP_END	0xf0000000
#else
#define	KMAP_START	0xd0000000
#define	KMAP_END	0xf0000000
#endif

#ifdef CONFIG_SUN3
extern unsigned long m68k_vmalloc_end;
#define VMALLOC_START 0x0f800000
#define VMALLOC_END m68k_vmalloc_end
#elif defined(CONFIG_COLDFIRE)
#define VMALLOC_START	0xd0000000
#define VMALLOC_END	0xe0000000
#else
/* Just any arbitrary offset to the start of the vmalloc VM area: the
 * current 8MB value just means that there will be a 8MB "hole" after the
 * physical memory until the kernel virtual memory starts.  That means that
 * any out-of-bounds memory accesses will hopefully be caught.
 * The vmalloc() routines leaves a hole of 4kB between each vmalloced
 * area for the same reason. ;)
 */
#define VMALLOC_OFFSET	(8*1024*1024)
#define VMALLOC_START (((unsigned long) high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END KMAP_START
#endif

/* zero page used for uninitialized stuff */
extern void *empty_zero_page;

/*
 * ZERO_PAGE is a global shared page that is always zero: used
 * for zero-mapped memory areas etc..
 */
#define ZERO_PAGE(vaddr)	(virt_to_page(empty_zero_page))

/* number of bits that fit into a memory pointer */
#define BITS_PER_PTR			(8*sizeof(unsigned long))

/* to align the pointer to a pointer address */
#define PTR_MASK			(~(sizeof(void*)-1))

/* sizeof(void*)==1<<SIZEOF_PTR_LOG2 */
/* 64-bit machines, beware!  SRB. */
#define SIZEOF_PTR_LOG2			       2

extern void kernel_set_cachemode(void *addr, unsigned long size, int cmode);

/*
 * The m68k doesn't have any external MMU info: the kernel page
 * tables contain all the necessary information.  The Sun3 does, but
 * they are updated on demand.
 */
static inline void update_mmu_cache(struct vm_area_struct *vma,
				    unsigned long address, pte_t *ptep)
{
}

#endif /* !__ASSEMBLY__ */

#define kern_addr_valid(addr)	(1)

/* MMU-specific headers */

#ifdef CONFIG_SUN3
#include <asm/sun3_pgtable.h>
#elif defined(CONFIG_COLDFIRE)
#include <asm/mcf_pgtable.h>
#else
#include <asm/motorola_pgtable.h>
#endif

#ifndef __ASSEMBLY__
/*
 * Macro to mark a page protection value as "uncacheable".
 */
#ifdef CONFIG_COLDFIRE
# define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) | CF_PAGE_NOCACHE))
#else
#ifdef SUN3_PAGE_NOCACHE
# define __SUN3_PAGE_NOCACHE	SUN3_PAGE_NOCACHE
#else
# define __SUN3_PAGE_NOCACHE	0
#endif
#define pgprot_noncached(prot)							\
	(MMU_IS_SUN3								\
	 ? (__pgprot(pgprot_val(prot) | __SUN3_PAGE_NOCACHE))			\
	 : ((MMU_IS_851 || MMU_IS_030)						\
	    ? (__pgprot(pgprot_val(prot) | _PAGE_NOCACHE030))			\
	    : (MMU_IS_040 || MMU_IS_060)					\
	    ? (__pgprot((pgprot_val(prot) & _CACHEMASK040) | _PAGE_NOCACHE_S))	\
	    : (prot)))

#endif /* CONFIG_COLDFIRE */
#include <asm-generic/pgtable.h>
#endif /* !__ASSEMBLY__ */

/*
 * No page table caches to initialise
 */
#define pgtable_cache_init()	do { } while (0)

#define check_pgt_cache()	do { } while (0)

#endif /* _M68K_PGTABLE_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 599 B 0644
MC68328.h File 37.82 KB 0644
MC68EZ328.h File 37.74 KB 0644
MC68VZ328.h File 41.02 KB 0644
a.out-core.h File 1.98 KB 0644
adb_iop.h File 1.09 KB 0644
amigahw.h File 10.49 KB 0644
amigaints.h File 3.5 KB 0644
amigayle.h File 3.19 KB 0644
amipcmcia.h File 2.51 KB 0644
apollohw.h File 2.35 KB 0644
asm-offsets.h File 35 B 0644
asm-prototypes.h File 211 B 0644
atafd.h File 300 B 0644
atafdreg.h File 2.68 KB 0644
atari_joystick.h File 457 B 0644
atari_stdma.h File 514 B 0644
atari_stram.h File 528 B 0644
atarihw.h File 20.3 KB 0644
atariints.h File 5.56 KB 0644
atarikb.h File 1.4 KB 0644
atomic.h File 4.86 KB 0644
bitops.h File 12.19 KB 0644
blinken.h File 641 B 0644
bootinfo.h File 783 B 0644
bootstd.h File 4.64 KB 0644
bug.h File 659 B 0644
bugs.h File 369 B 0644
bvme6000hw.h File 3.45 KB 0644
cache.h File 296 B 0644
cacheflush.h File 133 B 0644
cacheflush_mm.h File 6.92 KB 0644
cacheflush_no.h File 2.61 KB 0644
checksum.h File 3.4 KB 0644
cmpxchg.h File 3.34 KB 0644
coldfire.h File 1.61 KB 0644
contregs.h File 3.31 KB 0644
current.h File 580 B 0644
delay.h File 3.43 KB 0644
div64.h File 858 B 0644
dma-mapping.h File 291 B 0644
dma.h File 16.65 KB 0644
dsp56k.h File 1.24 KB 0644
dvma.h File 9.67 KB 0644
elf.h File 3.07 KB 0644
entry.h File 5.76 KB 0644
export.h File 74 B 0644
fb.h File 921 B 0644
fbio.h File 9.87 KB 0644
flat.h File 1.02 KB 0644
floppy.h File 5.06 KB 0644
fpu.h File 535 B 0644
ftrace.h File 12 B 0644
gpio.h File 2.64 KB 0644
hardirq.h File 594 B 0644
hash.h File 2.07 KB 0644
hp300hw.h File 186 B 0644
hwtest.h File 467 B 0644
ide.h File 1.67 KB 0644
idprom.h File 725 B 0644
intersil.h File 1.11 KB 0644
io.h File 383 B 0644
io_mm.h File 16.19 KB 0644
io_no.h File 5.26 KB 0644
irq.h File 2.57 KB 0644
irqflags.h File 1.61 KB 0644
kexec.h File 732 B 0644
linkage.h File 1.55 KB 0644
m5206sim.h File 6.4 KB 0644
m520xsim.h File 7.15 KB 0644
m523xsim.h File 7.7 KB 0644
m525xsim.h File 10.57 KB 0644
m5272sim.h File 6.05 KB 0644
m527xsim.h File 13.51 KB 0644
m528xsim.h File 9.37 KB 0644
m52xxacr.h File 3.57 KB 0644
m5307sim.h File 7.52 KB 0644
m53xxacr.h File 3.6 KB 0644
m53xxsim.h File 53.97 KB 0644
m5407sim.h File 6.14 KB 0644
m5441xsim.h File 8.5 KB 0644
m54xxacr.h File 4.82 KB 0644
m54xxgpt.h File 3.66 KB 0644
m54xxpci.h File 6.13 KB 0644
m54xxsim.h File 3.8 KB 0644
mac_asc.h File 520 B 0644
mac_baboon.h File 999 B 0644
mac_iop.h File 5.37 KB 0644
mac_oss.h File 1.83 KB 0644
mac_psc.h File 7.25 KB 0644
mac_via.h File 11.44 KB 0644
machdep.h File 1.34 KB 0644
machines.h File 3.13 KB 0644
machw.h File 588 B 0644
macintosh.h File 2.02 KB 0644
macints.h File 3.28 KB 0644
math-emu.h File 6.74 KB 0644
mc146818rtc.h File 598 B 0644
mcf8390.h File 3.75 KB 0644
mcf_pgalloc.h File 2.37 KB 0644
mcf_pgtable.h File 9.89 KB 0644
mcfclk.h File 1.01 KB 0644
mcfdma.h File 6.51 KB 0644
mcfgpio.h File 8.48 KB 0644
mcfintc.h File 3.09 KB 0644
mcfmmu.h File 3.67 KB 0644
mcfpit.h File 2.22 KB 0644
mcfqspi.h File 1.82 KB 0644
mcfsim.h File 1.5 KB 0644
mcfslt.h File 1.21 KB 0644
mcftimer.h File 2.3 KB 0644
mcfuart.h File 6.91 KB 0644
mcfwdebug.h File 4.99 KB 0644
mmu.h File 243 B 0644
mmu_context.h File 7.2 KB 0644
mmzone.h File 264 B 0644
module.h File 847 B 0644
motorola_pgalloc.h File 2.26 KB 0644
motorola_pgtable.h File 9.2 KB 0644
movs.h File 1.44 KB 0644
mvme147hw.h File 2.81 KB 0644
mvme16xhw.h File 2.16 KB 0644
natfeat.h File 533 B 0644
nettel.h File 2.95 KB 0644
nubus.h File 1.21 KB 0644
openprom.h File 7.98 KB 0644
oplib.h File 9.54 KB 0644
page.h File 1.47 KB 0644
page_mm.h File 4.06 KB 0644
page_no.h File 1.28 KB 0644
page_offset.h File 256 B 0644
parport.h File 837 B 0644
pci.h File 458 B 0644
pgalloc.h File 444 B 0644
pgtable.h File 127 B 0644
pgtable_mm.h File 4.84 KB 0644
pgtable_no.h File 1.57 KB 0644
processor.h File 3.59 KB 0644
ptrace.h File 643 B 0644
q40_master.h File 2.28 KB 0644
q40ints.h File 749 B 0644
quicc_simple.h File 1.79 KB 0644
raw_io.h File 11.41 KB 0644
segment.h File 1.42 KB 0644
serial.h File 1.14 KB 0644
setup.h File 9.25 KB 0644
signal.h File 1.34 KB 0644
smp.h File 32 B 0644
string.h File 1.68 KB 0644
sun3-head.h File 353 B 0644
sun3_pgalloc.h File 2.26 KB 0644
sun3_pgtable.h File 7.65 KB 0644
sun3ints.h File 989 B 0644
sun3mmu.h File 4.91 KB 0644
sun3x.h File 868 B 0644
sun3xflop.h File 5.62 KB 0644
sun3xprom.h File 1.31 KB 0644
switch_to.h File 1.51 KB 0644
thread_info.h File 2.02 KB 0644
timex.h File 974 B 0644
tlb.h File 486 B 0644
tlbflush.h File 5.95 KB 0644
traps.h File 8.33 KB 0644
uaccess.h File 152 B 0644
uaccess_mm.h File 10.31 KB 0644
uaccess_no.h File 3.69 KB 0644
ucontext.h File 570 B 0644
unaligned.h File 600 B 0644
unistd.h File 952 B 0644
user.h File 3.78 KB 0644
vga.h File 651 B 0644
virtconvert.h File 947 B 0644
zorro.h File 1.17 KB 0644