/* SPDX-License-Identifier: GPL-2.0 */
/*
* pgtable.h: SpitFire page table operations.
*
* Copyright 1996,1997 David S. Miller (davem@caip.rutgers.edu)
* Copyright 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#ifndef _SPARC64_PGTABLE_H
#define _SPARC64_PGTABLE_H
/* This file contains the functions and defines necessary to modify and use
* the SpitFire page tables.
*/
#include <asm-generic/pgtable-nop4d.h>
#include <linux/compiler.h>
#include <linux/const.h>
#include <asm/types.h>
#include <asm/spitfire.h>
#include <asm/asi.h>
#include <asm/adi.h>
#include <asm/page.h>
#include <asm/processor.h>
/* The kernel image occupies 0x4000000 to 0x6000000 (4MB --> 96MB).
* The page copy blockops can use 0x6000000 to 0x8000000.
* The 8K TSB is mapped in the 0x8000000 to 0x8400000 range.
* The 4M TSB is mapped in the 0x8400000 to 0x8800000 range.
* The PROM resides in an area spanning 0xf0000000 to 0x100000000.
* The vmalloc area spans 0x100000000 to 0x200000000.
* Since modules need to be in the lowest 32-bits of the address space,
* we place them right before the OBP area from 0x10000000 to 0xf0000000.
* There is a single static kernel PMD which maps from 0x0 to address
* 0x400000000.
*/
#define TLBTEMP_BASE _AC(0x0000000006000000,UL)
#define TSBMAP_8K_BASE _AC(0x0000000008000000,UL)
#define TSBMAP_4M_BASE _AC(0x0000000008400000,UL)
#define MODULES_VADDR _AC(0x0000000010000000,UL)
#define MODULES_LEN _AC(0x00000000e0000000,UL)
#define MODULES_END _AC(0x00000000f0000000,UL)
#define LOW_OBP_ADDRESS _AC(0x00000000f0000000,UL)
#define HI_OBP_ADDRESS _AC(0x0000000100000000,UL)
#define VMALLOC_START _AC(0x0000000100000000,UL)
#define VMEMMAP_BASE VMALLOC_END
/* PMD_SHIFT determines the size of the area a second-level page
* table can map
*/
#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3))
#define PMD_SIZE (_AC(1,UL) << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE-1))
#define PMD_BITS (PAGE_SHIFT - 3)
/* PUD_SHIFT determines the size of the area a third-level page
* table can map
*/
#define PUD_SHIFT (PMD_SHIFT + PMD_BITS)
#define PUD_SIZE (_AC(1,UL) << PUD_SHIFT)
#define PUD_MASK (~(PUD_SIZE-1))
#define PUD_BITS (PAGE_SHIFT - 3)
/* PGDIR_SHIFT determines what a fourth-level page table entry can map */
#define PGDIR_SHIFT (PUD_SHIFT + PUD_BITS)
#define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
#define PGDIR_BITS (PAGE_SHIFT - 3)
#if (MAX_PHYS_ADDRESS_BITS > PGDIR_SHIFT + PGDIR_BITS)
#error MAX_PHYS_ADDRESS_BITS exceeds what kernel page tables can support
#endif
#if (PGDIR_SHIFT + PGDIR_BITS) != 53
#error Page table parameters do not cover virtual address space properly.
#endif
#if (PMD_SHIFT != HPAGE_SHIFT)
#error PMD_SHIFT must equal HPAGE_SHIFT for transparent huge pages.
#endif
#ifndef __ASSEMBLY__
extern unsigned long VMALLOC_END;
#define vmemmap ((struct page *)VMEMMAP_BASE)
#include <linux/sched.h>
#include <asm/tlbflush.h>
bool kern_addr_valid(unsigned long addr);
/* Entries per page directory level. */
#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3))
#define PTRS_PER_PMD (1UL << PMD_BITS)
#define PTRS_PER_PUD (1UL << PUD_BITS)
#define PTRS_PER_PGD (1UL << PGDIR_BITS)
#define pmd_ERROR(e) \
pr_err("%s:%d: bad pmd %p(%016lx) seen at (%pS)\n", \
__FILE__, __LINE__, &(e), pmd_val(e), __builtin_return_address(0))
#define pud_ERROR(e) \
pr_err("%s:%d: bad pud %p(%016lx) seen at (%pS)\n", \
__FILE__, __LINE__, &(e), pud_val(e), __builtin_return_address(0))
#define pgd_ERROR(e) \
pr_err("%s:%d: bad pgd %p(%016lx) seen at (%pS)\n", \
__FILE__, __LINE__, &(e), pgd_val(e), __builtin_return_address(0))
#endif /* !(__ASSEMBLY__) */
/* PTE bits which are the same in SUN4U and SUN4V format. */
#define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */
#define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/
#define _PAGE_SPECIAL _AC(0x0200000000000000,UL) /* Special page */
#define _PAGE_PMD_HUGE _AC(0x0100000000000000,UL) /* Huge page */
#define _PAGE_PUD_HUGE _PAGE_PMD_HUGE
/* SUN4U pte bits... */
#define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */
#define _PAGE_SZ512K_4U _AC(0x4000000000000000,UL) /* 512K Page */
#define _PAGE_SZ64K_4U _AC(0x2000000000000000,UL) /* 64K Page */
#define _PAGE_SZ8K_4U _AC(0x0000000000000000,UL) /* 8K Page */
#define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */
#define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */
#define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */
#define _PAGE_SPECIAL_4U _AC(0x0200000000000000,UL) /* Special page */
#define _PAGE_PMD_HUGE_4U _AC(0x0100000000000000,UL) /* Huge page */
#define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */
#define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */
#define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */
#define _PAGE_SZALL_4U _AC(0x6001000000000000,UL) /* All pgsz bits */
#define _PAGE_SN_4U _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */
#define _PAGE_RES2_4U _AC(0x0000780000000000,UL) /* Reserved */
#define _PAGE_PADDR_4U _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13] */
#define _PAGE_SOFT_4U _AC(0x0000000000001F80,UL) /* Software bits: */
#define _PAGE_EXEC_4U _AC(0x0000000000001000,UL) /* Executable SW bit */
#define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty) */
#define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd) */
#define _PAGE_READ_4U _AC(0x0000000000000200,UL) /* Readable SW Bit */
#define _PAGE_WRITE_4U _AC(0x0000000000000100,UL) /* Writable SW Bit */
#define _PAGE_PRESENT_4U _AC(0x0000000000000080,UL) /* Present */
#define _PAGE_L_4U _AC(0x0000000000000040,UL) /* Locked TTE */
#define _PAGE_CP_4U _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
#define _PAGE_CV_4U _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
#define _PAGE_E_4U _AC(0x0000000000000008,UL) /* side-Effect */
#define _PAGE_P_4U _AC(0x0000000000000004,UL) /* Privileged Page */
#define _PAGE_W_4U _AC(0x0000000000000002,UL) /* Writable */
/* SUN4V pte bits... */
#define _PAGE_NFO_4V _AC(0x4000000000000000,UL) /* No Fault Only */
#define _PAGE_SOFT2_4V _AC(0x3F00000000000000,UL) /* Software bits, set 2 */
#define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty) */
#define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */
#define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */
#define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */
#define _PAGE_SPECIAL_4V _AC(0x0200000000000000,UL) /* Special page */
#define _PAGE_PMD_HUGE_4V _AC(0x0100000000000000,UL) /* Huge page */
#define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */
#define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */
#define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */
#define _PAGE_CP_4V _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */
#define _PAGE_CV_4V _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */
/* Bit 9 is used to enable MCD corruption detection instead on M7 */
#define _PAGE_MCD_4V _AC(0x0000000000000200,UL) /* Memory Corruption */
#define _PAGE_P_4V _AC(0x0000000000000100,UL) /* Privileged Page */
#define _PAGE_EXEC_4V _AC(0x0000000000000080,UL) /* Executable Page */
#define _PAGE_W_4V _AC(0x0000000000000040,UL) /* Writable */
#define _PAGE_SOFT_4V _AC(0x0000000000000030,UL) /* Software bits */
#define _PAGE_PRESENT_4V _AC(0x0000000000000010,UL) /* Present */
#define _PAGE_RESV_4V _AC(0x0000000000000008,UL) /* Reserved */
#define _PAGE_SZ16GB_4V _AC(0x0000000000000007,UL) /* 16GB Page */
#define _PAGE_SZ2GB_4V _AC(0x0000000000000006,UL) /* 2GB Page */
#define _PAGE_SZ256MB_4V _AC(0x0000000000000005,UL) /* 256MB Page */
#define _PAGE_SZ32MB_4V _AC(0x0000000000000004,UL) /* 32MB Page */
#define _PAGE_SZ4MB_4V _AC(0x0000000000000003,UL) /* 4MB Page */
#define _PAGE_SZ512K_4V _AC(0x0000000000000002,UL) /* 512K Page */
#define _PAGE_SZ64K_4V _AC(0x0000000000000001,UL) /* 64K Page */
#define _PAGE_SZ8K_4V _AC(0x0000000000000000,UL) /* 8K Page */
#define _PAGE_SZALL_4V _AC(0x0000000000000007,UL) /* All pgsz bits */
#define _PAGE_SZBITS_4U _PAGE_SZ8K_4U
#define _PAGE_SZBITS_4V _PAGE_SZ8K_4V
#if REAL_HPAGE_SHIFT != 22
#error REAL_HPAGE_SHIFT and _PAGE_SZHUGE_foo must match up
#endif
#define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U
#define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V
/* We borrow bit 20 to store the exclusive marker in swap PTEs. */
#define _PAGE_SWP_EXCLUSIVE _AC(0x0000000000100000, UL)
#ifndef __ASSEMBLY__
pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
unsigned long pte_sz_bits(unsigned long size);
extern pgprot_t PAGE_KERNEL;
extern pgprot_t PAGE_KERNEL_LOCKED;
extern pgprot_t PAGE_COPY;
extern pgprot_t PAGE_SHARED;
/* XXX This ugliness is for the atyfb driver's sparc mmap() support. XXX */
extern unsigned long _PAGE_IE;
extern unsigned long _PAGE_E;
extern unsigned long _PAGE_CACHE;
extern unsigned long pg_iobits;
extern unsigned long _PAGE_ALL_SZ_BITS;
extern struct page *mem_map_zero;
#define ZERO_PAGE(vaddr) (mem_map_zero)
/* PFNs are real physical page numbers. However, mem_map only begins to record
* per-page information starting at pfn_base. This is to handle systems where
* the first physical page in the machine is at some huge physical address,
* such as 4GB. This is common on a partitioned E10000, for example.
*/
static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
{
unsigned long paddr = pfn << PAGE_SHIFT;
BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
return __pte(paddr | pgprot_val(prot));
}
#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
{
pte_t pte = pfn_pte(page_nr, pgprot);
return __pmd(pte_val(pte));
}
#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
#endif
/* This one can be done with two shifts. */
static inline unsigned long pte_pfn(pte_t pte)
{
unsigned long ret;
__asm__ __volatile__(
"\n661: sllx %1, %2, %0\n"
" srlx %0, %3, %0\n"
" .section .sun4v_2insn_patch, \"ax\"\n"
" .word 661b\n"
" sllx %1, %4, %0\n"
" srlx %0, %5, %0\n"
" .previous\n"
: "=r" (ret)
: "r" (pte_val(pte)),
"i" (21), "i" (21 + PAGE_SHIFT),
"i" (8), "i" (8 + PAGE_SHIFT));
return ret;
}
#define pte_page(x) pfn_to_page(pte_pfn(x))
static inline pte_t pte_modify(pte_t pte, pgprot_t prot)
{
unsigned long mask, tmp;
/* SUN4U: 0x630107ffffffec38 (negated == 0x9cfef800000013c7)
* SUN4V: 0x33ffffffffffee07 (negated == 0xcc000000000011f8)
*
* Even if we use negation tricks the result is still a 6
* instruction sequence, so don't try to play fancy and just
* do the most straightforward implementation.
*
* Note: We encode this into 3 sun4v 2-insn patch sequences.
*/
BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
__asm__ __volatile__(
"\n661: sethi %%uhi(%2), %1\n"
" sethi %%hi(%2), %0\n"
"\n662: or %1, %%ulo(%2), %1\n"
" or %0, %%lo(%2), %0\n"
"\n663: sllx %1, 32, %1\n"
" or %0, %1, %0\n"
" .section .sun4v_2insn_patch, \"ax\"\n"
" .word 661b\n"
" sethi %%uhi(%3), %1\n"
" sethi %%hi(%3), %0\n"
" .word 662b\n"
" or %1, %%ulo(%3), %1\n"
" or %0, %%lo(%3), %0\n"
" .word 663b\n"
" sllx %1, 32, %1\n"
" or %0, %1, %0\n"
" .previous\n"
" .section .sun_m7_2insn_patch, \"ax\"\n"
" .word 661b\n"
" sethi %%uhi(%4), %1\n"
" sethi %%hi(%4), %0\n"
" .word 662b\n"
" or %1, %%ulo(%4), %1\n"
" or %0, %%lo(%4), %0\n"
" .word 663b\n"
" sllx %1, 32, %1\n"
" or %0, %1, %0\n"
" .previous\n"
: "=r" (mask), "=r" (tmp)
: "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U |
_PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U |
_PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4U),
"i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
_PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V |
_PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V),
"i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
_PAGE_CP_4V | _PAGE_E_4V |
_PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V));
return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask));
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
{
pte_t pte = __pte(pmd_val(pmd));
pte = pte_modify(pte, newprot);
return __pmd(pte_val(pte));
}
#endif
static inline pgprot_t pgprot_noncached(pgprot_t prot)
{
unsigned long val = pgprot_val(prot);
__asm__ __volatile__(
"\n661: andn %0, %2, %0\n"
" or %0, %3, %0\n"
" .section .sun4v_2insn_patch, \"ax\"\n"
" .word 661b\n"
" andn %0, %4, %0\n"
" or %0, %5, %0\n"
" .previous\n"
" .section .sun_m7_2insn_patch, \"ax\"\n"
" .word 661b\n"
" andn %0, %6, %0\n"
" or %0, %5, %0\n"
" .previous\n"
: "=r" (val)
: "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U),
"i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V),
"i" (_PAGE_CP_4V));
return __pgprot(val);
}
/* Various pieces of code check for platform support by ifdef testing
* on "pgprot_noncached". That's broken and should be fixed, but for
* now...
*/
#define pgprot_noncached pgprot_noncached
static inline unsigned long pte_dirty(pte_t pte)
{
unsigned long mask;
__asm__ __volatile__(
"\n661: mov %1, %0\n"
" nop\n"
" .section .sun4v_2insn_patch, \"ax\"\n"
" .word 661b\n"
" sethi %%uhi(%2), %0\n"
" sllx %0, 32, %0\n"
" .previous\n"
: "=r" (mask)
: "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
return (pte_val(pte) & mask);
}
static inline unsigned long pte_write(pte_t pte)
{
unsigned long mask;
__asm__ __volatile__(
"\n661: mov %1, %0\n"
" nop\n"
" .section .sun4v_2insn_patch, \"ax\"\n"
" .word 661b\n"
" sethi %%uhi(%2), %0\n"
" sllx %0, 32, %0\n"
" .previous\n"
: "=r" (mask)
: "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
return (pte_val(pte) & mask);
}
#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, vm_flags_t flags);
#define arch_make_huge_pte arch_make_huge_pte
static inline unsigned long __pte_default_huge_mask(void)
{
unsigned long mask;
__asm__ __volatile__(
"\n661: sethi %%uhi(%1), %0\n"
" sllx %0, 32, %0\n"
" .section .sun4v_2insn_patch, \"ax\"\n"
" .word 661b\n"
" mov %2, %0\n"
" nop\n"
" .previous\n"
: "=r" (mask)
: "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V));
return mask;
}
static inline pte_t pte_mkhuge(pte_t pte)
{
return __pte(pte_val(pte) | __pte_default_huge_mask());
}
static inline bool is_default_hugetlb_pte(pte_t pte)
{
unsigned long mask = __pte_default_huge_mask();
return (pte_val(pte) & mask) == mask;
}
static inline bool is_hugetlb_pmd(pmd_t pmd)
{
return !!(pmd_val(pmd) & _PAGE_PMD_HUGE);
}
static inline bool is_hugetlb_pud(pud_t pud)
{
return !!(pud_val(pud) & _PAGE_PUD_HUGE);
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static inline pmd_t pmd_mkhuge(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
pte = pte_mkhuge(pte);
pte_val(pte) |= _PAGE_PMD_HUGE;
return __pmd(pte_val(pte));
}
#endif
#else
static inline bool is_hugetlb_pte(pte_t pte)
{
return false;
}
#endif
static inline pte_t __pte_mkhwwrite(pte_t pte)
{
unsigned long val = pte_val(pte);
/*
* Note: we only want to set the HW writable bit if the SW writable bit
* and the SW dirty bit are set.
*/
__asm__ __volatile__(
"\n661: or %0, %2, %0\n"
" .section .sun4v_1insn_patch, \"ax\"\n"
" .word 661b\n"
" or %0, %3, %0\n"
" .previous\n"
: "=r" (val)
: "0" (val), "i" (_PAGE_W_4U), "i" (_PAGE_W_4V));
return __pte(val);
}
static inline pte_t pte_mkdirty(pte_t pte)
{
unsigned long val = pte_val(pte), mask;
__asm__ __volatile__(
"\n661: mov %1, %0\n"
" nop\n"
" .section .sun4v_2insn_patch, \"ax\"\n"
" .word 661b\n"
" sethi %%uhi(%2), %0\n"
" sllx %0, 32, %0\n"
" .previous\n"
: "=r" (mask)
: "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
pte = __pte(val | mask);
return pte_write(pte) ? __pte_mkhwwrite(pte) : pte;
}
static inline pte_t pte_mkclean(pte_t pte)
{
unsigned long val = pte_val(pte), tmp;
__asm__ __volatile__(
"\n661: andn %0, %3, %0\n"
" nop\n"
"\n662: nop\n"
" nop\n"
" .section .sun4v_2insn_patch, \"ax\"\n"
" .word 661b\n"
" sethi %%uhi(%4), %1\n"
" sllx %1, 32, %1\n"
" .word 662b\n"
" or %1, %%lo(%4), %1\n"
" andn %0, %1, %0\n"
" .previous\n"
: "=r" (val), "=r" (tmp)
: "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
"i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
return __pte(val);
}
static inline pte_t pte_mkwrite_novma(pte_t pte)
{
unsigned long val = pte_val(pte), mask;
__asm__ __volatile__(
"\n661: mov %1, %0\n"
" nop\n"
" .section .sun4v_2insn_patch, \"ax\"\n"
" .word 661b\n"
" sethi %%uhi(%2), %0\n"
" sllx %0, 32, %0\n"
" .previous\n"
: "=r" (mask)
: "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
pte = __pte(val | mask);
return pte_dirty(pte) ? __pte_mkhwwrite(pte) : pte;
}
static inline pte_t pte_wrprotect(pte_t pte)
{
unsigned long val = pte_val(pte), tmp;
__asm__ __volatile__(
"\n661: andn %0, %3, %0\n"
" nop\n"
"\n662: nop\n"
" nop\n"
" .section .sun4v_2insn_patch, \"ax\"\n"
" .word 661b\n"
" sethi %%uhi(%4), %1\n"
" sllx %1, 32, %1\n"
" .word 662b\n"
" or %1, %%lo(%4), %1\n"
" andn %0, %1, %0\n"
" .previous\n"
: "=r" (val), "=r" (tmp)
: "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U),
"i" (_PAGE_WRITE_4V | _PAGE_W_4V));
return __pte(val);
}
static inline pte_t pte_mkold(pte_t pte)
{
unsigned long mask;
__asm__ __volatile__(
"\n661: mov %1, %0\n"
" nop\n"
" .section .sun4v_2insn_patch, \"ax\"\n"
" .word 661b\n"
" sethi %%uhi(%2), %0\n"
" sllx %0, 32, %0\n"
" .previous\n"
: "=r" (mask)
: "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
mask |= _PAGE_R;
return __pte(pte_val(pte) & ~mask);
}
static inline pte_t pte_mkyoung(pte_t pte)
{
unsigned long mask;
__asm__ __volatile__(
"\n661: mov %1, %0\n"
" nop\n"
" .section .sun4v_2insn_patch, \"ax\"\n"
" .word 661b\n"
" sethi %%uhi(%2), %0\n"
" sllx %0, 32, %0\n"
" .previous\n"
: "=r" (mask)
: "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
mask |= _PAGE_R;
return __pte(pte_val(pte) | mask);
}
static inline pte_t pte_mkspecial(pte_t pte)
{
pte_val(pte) |= _PAGE_SPECIAL;
return pte;
}
static inline pte_t pte_mkmcd(pte_t pte)
{
pte_val(pte) |= _PAGE_MCD_4V;
return pte;
}
static inline pte_t pte_mknotmcd(pte_t pte)
{
pte_val(pte) &= ~_PAGE_MCD_4V;
return pte;
}
static inline unsigned long pte_young(pte_t pte)
{
unsigned long mask;
__asm__ __volatile__(
"\n661: mov %1, %0\n"
" nop\n"
" .section .sun4v_2insn_patch, \"ax\"\n"
" .word 661b\n"
" sethi %%uhi(%2), %0\n"
" sllx %0, 32, %0\n"
" .previous\n"
: "=r" (mask)
: "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
return (pte_val(pte) & mask);
}
static inline unsigned long pte_exec(pte_t pte)
{
unsigned long mask;
__asm__ __volatile__(
"\n661: sethi %%hi(%1), %0\n"
" .section .sun4v_1insn_patch, \"ax\"\n"
" .word 661b\n"
" mov %2, %0\n"
" .previous\n"
: "=r" (mask)
: "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V));
return (pte_val(pte) & mask);
}
static inline unsigned long pte_present(pte_t pte)
{
unsigned long val = pte_val(pte);
__asm__ __volatile__(
"\n661: and %0, %2, %0\n"
" .section .sun4v_1insn_patch, \"ax\"\n"
" .word 661b\n"
" and %0, %3, %0\n"
" .previous\n"
: "=r" (val)
: "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V));
return val;
}
#define pte_accessible pte_accessible
static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a)
{
return pte_val(a) & _PAGE_VALID;
}
static inline unsigned long pte_special(pte_t pte)
{
return pte_val(pte) & _PAGE_SPECIAL;
}
#define pmd_leaf pmd_large
static inline unsigned long pmd_large(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
return pte_val(pte) & _PAGE_PMD_HUGE;
}
static inline unsigned long pmd_pfn(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
return pte_pfn(pte);
}
#define pmd_write pmd_write
static inline unsigned long pmd_write(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
return pte_write(pte);
}
#define pud_write(pud) pte_write(__pte(pud_val(pud)))
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static inline unsigned long pmd_dirty(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
return pte_dirty(pte);
}
#define pmd_young pmd_young
static inline unsigned long pmd_young(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
return pte_young(pte);
}
static inline unsigned long pmd_trans_huge(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
return pte_val(pte) & _PAGE_PMD_HUGE;
}
static inline pmd_t pmd_mkold(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
pte = pte_mkold(pte);
return __pmd(pte_val(pte));
}
static inline pmd_t pmd_wrprotect(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
pte = pte_wrprotect(pte);
return __pmd(pte_val(pte));
}
static inline pmd_t pmd_mkdirty(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
pte = pte_mkdirty(pte);
return __pmd(pte_val(pte));
}
static inline pmd_t pmd_mkclean(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
pte = pte_mkclean(pte);
return __pmd(pte_val(pte));
}
static inline pmd_t pmd_mkyoung(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
pte = pte_mkyoung(pte);
return __pmd(pte_val(pte));
}
static inline pmd_t pmd_mkwrite_novma(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
pte = pte_mkwrite_novma(pte);
return __pmd(pte_val(pte));
}
static inline pgprot_t pmd_pgprot(pmd_t entry)
{
unsigned long val = pmd_val(entry);
return __pgprot(val);
}
#endif
static inline int pmd_present(pmd_t pmd)
{
return pmd_val(pmd) != 0UL;
}
#define pmd_none(pmd) (!pmd_val(pmd))
/* pmd_bad() is only called on non-trans-huge PMDs. Our encoding is
* very simple, it's just the physical address. PTE tables are of
* size PAGE_SIZE so make sure the sub-PAGE_SIZE bits are clear and
* the top bits outside of the range of any physical address size we
* support are clear as well. We also validate the physical itself.
*/
#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
#define pud_none(pud) (!pud_val(pud))
#define pud_bad(pud) (pud_val(pud) & ~PAGE_MASK)
#define p4d_none(p4d) (!p4d_val(p4d))
#define p4d_bad(p4d) (p4d_val(p4d) & ~PAGE_MASK)
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
void set_pmd_at(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t pmd);
#else
static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t pmd)
{
*pmdp = pmd;
}
#endif
static inline void pmd_set(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
{
unsigned long val = __pa((unsigned long) (ptep));
pmd_val(*pmdp) = val;
}
#define pud_set(pudp, pmdp) \
(pud_val(*(pudp)) = (__pa((unsigned long) (pmdp))))
static inline unsigned long pmd_page_vaddr(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
unsigned long pfn;
pfn = pte_pfn(pte);
return ((unsigned long) __va(pfn << PAGE_SHIFT));
}
static inline pmd_t *pud_pgtable(pud_t pud)
{
pte_t pte = __pte(pud_val(pud));
unsigned long pfn;
pfn = pte_pfn(pte);
return ((pmd_t *) __va(pfn << PAGE_SHIFT));
}
#define pmd_page(pmd) virt_to_page((void *)pmd_page_vaddr(pmd))
#define pud_page(pud) virt_to_page((void *)pud_pgtable(pud))
#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL)
#define pud_present(pud) (pud_val(pud) != 0U)
#define pud_clear(pudp) (pud_val(*(pudp)) = 0UL)
#define p4d_pgtable(p4d) \
((pud_t *) __va(p4d_val(p4d)))
#define p4d_present(p4d) (p4d_val(p4d) != 0U)
#define p4d_clear(p4dp) (p4d_val(*(p4dp)) = 0UL)
/* only used by the stubbed out hugetlb gup code, should never be called */
#define p4d_page(p4d) NULL
#define pud_leaf pud_large
static inline unsigned long pud_large(pud_t pud)
{
pte_t pte = __pte(pud_val(pud));
return pte_val(pte) & _PAGE_PMD_HUGE;
}
static inline unsigned long pud_pfn(pud_t pud)
{
pte_t pte = __pte(pud_val(pud));
return pte_pfn(pte);
}
/* Same in both SUN4V and SUN4U. */
#define pte_none(pte) (!pte_val(pte))
#define p4d_set(p4dp, pudp) \
(p4d_val(*(p4dp)) = (__pa((unsigned long) (pudp))))
/* We cannot include <linux/mm_types.h> at this point yet: */
extern struct mm_struct init_mm;
/* Actual page table PTE updates. */
void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
pte_t *ptep, pte_t orig, int fullmm,
unsigned int hugepage_shift);
static void maybe_tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
pte_t *ptep, pte_t orig, int fullmm,
unsigned int hugepage_shift)
{
/* It is more efficient to let flush_tlb_kernel_range()
* handle init_mm tlb flushes.
*
* SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
* and SUN4V pte layout, so this inline test is fine.
*/
if (likely(mm != &init_mm) && pte_accessible(mm, orig))
tlb_batch_add(mm, vaddr, ptep, orig, fullmm, hugepage_shift);
}
#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
unsigned long addr,
pmd_t *pmdp)
{
pmd_t pmd = *pmdp;
set_pmd_at(mm, addr, pmdp, __pmd(0UL));
return pmd;
}
static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte, int fullmm)
{
pte_t orig = *ptep;
*ptep = pte;
maybe_tlb_batch_add(mm, addr, ptep, orig, fullmm, PAGE_SHIFT);
}
static inline void set_ptes(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte, unsigned int nr)
{
arch_enter_lazy_mmu_mode();
for (;;) {
__set_pte_at(mm, addr, ptep, pte, 0);
if (--nr == 0)
break;
ptep++;
pte_val(pte) += PAGE_SIZE;
addr += PAGE_SIZE;
}
arch_leave_lazy_mmu_mode();
}
#define set_ptes set_ptes
#define pte_clear(mm,addr,ptep) \
set_pte_at((mm), (addr), (ptep), __pte(0UL))
#define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
#define pte_clear_not_present_full(mm,addr,ptep,fullmm) \
__set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm))
#ifdef DCACHE_ALIASING_POSSIBLE
#define __HAVE_ARCH_MOVE_PTE
#define move_pte(pte, prot, old_addr, new_addr) \
({ \
pte_t newpte = (pte); \
if (tlb_type != hypervisor && pte_present(pte)) { \
unsigned long this_pfn = pte_pfn(pte); \
\
if (pfn_valid(this_pfn) && \
(((old_addr) ^ (new_addr)) & (1 << 13))) \
flush_dcache_folio_all(current->mm, \
page_folio(pfn_to_page(this_pfn))); \
} \
newpte; \
})
#endif
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
void paging_init(void);
unsigned long find_ecache_flush_span(unsigned long size);
struct seq_file;
void mmu_info(struct seq_file *);
struct vm_area_struct;
void update_mmu_cache_range(struct vm_fault *, struct vm_area_struct *,
unsigned long addr, pte_t *ptep, unsigned int nr);
#define update_mmu_cache(vma, addr, ptep) \
update_mmu_cache_range(NULL, vma, addr, ptep, 1)
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
pmd_t *pmd);
#define __HAVE_ARCH_PMDP_INVALIDATE
extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
pmd_t *pmdp);
#define __HAVE_ARCH_PGTABLE_DEPOSIT
void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
pgtable_t pgtable);
#define __HAVE_ARCH_PGTABLE_WITHDRAW
pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
#endif
/*
* Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that
* are !pte_none() && !pte_present().
*
* Format of swap PTEs:
*
* 6 6 6 6 5 5 5 5 5 5 5 5 5 5 4 4 4 4 4 4 4 4 4 4 3 3 3 3 3 3 3 3
* 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2
* <--------------------------- offset ---------------------------
*
* 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
* --------------------> E <-- type ---> <------- zeroes -------->
*/
#define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0x7fUL)
#define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL))
#define __swp_entry(type, offset) \
( (swp_entry_t) \
{ \
((((long)(type) & 0x7fUL) << PAGE_SHIFT) | \
((long)(offset) << (PAGE_SHIFT + 8UL))) \
} )
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
}
static inline pte_t pte_swp_mkexclusive(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_SWP_EXCLUSIVE);
}
static inline pte_t pte_swp_clear_exclusive(pte_t pte)
{
return __pte(pte_val(pte) & ~_PAGE_SWP_EXCLUSIVE);
}
int page_in_phys_avail(unsigned long paddr);
/*
* For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
* its high 4 bits. These macros/functions put it there or get it from there.
*/
#define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4)))
#define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4))
#define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL)
int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long,
unsigned long, pgprot_t);
void adi_restore_tags(struct mm_struct *mm, struct vm_area_struct *vma,
unsigned long addr, pte_t pte);
int adi_save_tags(struct mm_struct *mm, struct vm_area_struct *vma,
unsigned long addr, pte_t oldpte);
#define __HAVE_ARCH_DO_SWAP_PAGE
static inline void arch_do_swap_page(struct mm_struct *mm,
struct vm_area_struct *vma,
unsigned long addr,
pte_t pte, pte_t oldpte)
{
/* If this is a new page being mapped in, there can be no
* ADI tags stored away for this page. Skip looking for
* stored tags
*/
if (pte_none(oldpte))
return;
if (adi_state.enabled && (pte_val(pte) & _PAGE_MCD_4V))
adi_restore_tags(mm, vma, addr, pte);
}
#define __HAVE_ARCH_UNMAP_ONE
static inline int arch_unmap_one(struct mm_struct *mm,
struct vm_area_struct *vma,
unsigned long addr, pte_t oldpte)
{
if (adi_state.enabled && (pte_val(oldpte) & _PAGE_MCD_4V))
return adi_save_tags(mm, vma, addr, oldpte);
return 0;
}
static inline int io_remap_pfn_range(struct vm_area_struct *vma,
unsigned long from, unsigned long pfn,
unsigned long size, pgprot_t prot)
{
unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
int space = GET_IOSPACE(pfn);
unsigned long phys_base;
phys_base = offset | (((unsigned long) space) << 32UL);
return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot);
}
#define io_remap_pfn_range io_remap_pfn_range
static inline unsigned long __untagged_addr(unsigned long start)
{
if (adi_capable()) {
long addr = start;
/* If userspace has passed a versioned address, kernel
* will not find it in the VMAs since it does not store
* the version tags in the list of VMAs. Storing version
* tags in list of VMAs is impractical since they can be
* changed any time from userspace without dropping into
* kernel. Any address search in VMAs will be done with
* non-versioned addresses. Ensure the ADI version bits
* are dropped here by sign extending the last bit before
* ADI bits. IOMMU does not implement version tags.
*/
return (addr << (long)adi_nbits()) >> (long)adi_nbits();
}
return start;
}
#define untagged_addr(addr) \
((__typeof__(addr))(__untagged_addr((unsigned long)(addr))))
static inline bool pte_access_permitted(pte_t pte, bool write)
{
u64 prot;
if (tlb_type == hypervisor) {
prot = _PAGE_PRESENT_4V | _PAGE_P_4V;
if (write)
prot |= _PAGE_WRITE_4V;
} else {
prot = _PAGE_PRESENT_4U | _PAGE_P_4U;
if (write)
prot |= _PAGE_WRITE_4U;
}
return (pte_val(pte) & (prot | _PAGE_SPECIAL)) == prot;
}
#define pte_access_permitted pte_access_permitted
/* We provide our own get_unmapped_area to cope with VA holes and
* SHM area cache aliasing for userland.
*/
#define HAVE_ARCH_UNMAPPED_AREA
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
/* We provide a special get_unmapped_area for framebuffer mmaps to try and use
* the largest alignment possible such that larget PTEs can be used.
*/
unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
unsigned long, unsigned long,
unsigned long);
#define HAVE_ARCH_FB_UNMAPPED_AREA
void sun4v_register_fault_status(void);
void sun4v_ktsb_register(void);
void __init cheetah_ecache_flush_init(void);
void sun4v_patch_tlb_handlers(void);
extern unsigned long cmdline_memory_size;
asmlinkage void do_sparc64_fault(struct pt_regs *regs);
#define pmd_pgtable(PMD) ((pte_t *)pmd_page_vaddr(PMD))
#ifdef CONFIG_HUGETLB_PAGE
#define pud_leaf_size pud_leaf_size
extern unsigned long pud_leaf_size(pud_t pud);
#define pmd_leaf_size pmd_leaf_size
extern unsigned long pmd_leaf_size(pmd_t pmd);
#define pte_leaf_size pte_leaf_size
extern unsigned long pte_leaf_size(pte_t pte);
#endif /* CONFIG_HUGETLB_PAGE */
#endif /* !(__ASSEMBLY__) */
#endif /* !(_SPARC64_PGTABLE_H) */