1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */
2f15cbe6fSPaul Mundt #ifndef __ASM_SH_PGTABLE_32_H
3f15cbe6fSPaul Mundt #define __ASM_SH_PGTABLE_32_H
4f15cbe6fSPaul Mundt
5f15cbe6fSPaul Mundt /*
6f15cbe6fSPaul Mundt * Linux PTEL encoding.
7f15cbe6fSPaul Mundt *
8f15cbe6fSPaul Mundt * Hardware and software bit definitions for the PTEL value (see below for
9f15cbe6fSPaul Mundt * notes on SH-X2 MMUs and 64-bit PTEs):
10f15cbe6fSPaul Mundt *
11f15cbe6fSPaul Mundt * - Bits 0 and 7 are reserved on SH-3 (_PAGE_WT and _PAGE_SZ1 on SH-4).
12f15cbe6fSPaul Mundt *
13f15cbe6fSPaul Mundt * - Bit 1 is the SH-bit, but is unused on SH-3 due to an MMU bug (the
14f15cbe6fSPaul Mundt * hardware PTEL value can't have the SH-bit set when MMUCR.IX is set,
15f15cbe6fSPaul Mundt * which is the default in cpu-sh3/mmu_context.h:MMU_CONTROL_INIT).
16f15cbe6fSPaul Mundt *
17f15cbe6fSPaul Mundt * In order to keep this relatively clean, do not use these for defining
18f15cbe6fSPaul Mundt * SH-3 specific flags until all of the other unused bits have been
19f15cbe6fSPaul Mundt * exhausted.
20f15cbe6fSPaul Mundt *
21f15cbe6fSPaul Mundt * - Bit 9 is reserved by everyone and used by _PAGE_PROTNONE.
22f15cbe6fSPaul Mundt *
23f15cbe6fSPaul Mundt * - Bits 10 and 11 are low bits of the PPN that are reserved on >= 4K pages.
24c0b96cf6SPaul Mundt * Bit 10 is used for _PAGE_ACCESSED, and bit 11 is used for _PAGE_SPECIAL.
25f15cbe6fSPaul Mundt *
26f15cbe6fSPaul Mundt * - On 29 bit platforms, bits 31 to 29 are used for the space attributes
27f15cbe6fSPaul Mundt * and timing control which (together with bit 0) are moved into the
28f15cbe6fSPaul Mundt * old-style PTEA on the parts that support it.
29f15cbe6fSPaul Mundt *
30f15cbe6fSPaul Mundt * SH-X2 MMUs and extended PTEs
31f15cbe6fSPaul Mundt *
32f15cbe6fSPaul Mundt * SH-X2 supports an extended mode TLB with split data arrays due to the
33f15cbe6fSPaul Mundt * number of bits needed for PR and SZ (now EPR and ESZ) encodings. The PR and
34f15cbe6fSPaul Mundt * SZ bit placeholders still exist in data array 1, but are implemented as
35f15cbe6fSPaul Mundt * reserved bits, with the real logic existing in data array 2.
36f15cbe6fSPaul Mundt *
37f15cbe6fSPaul Mundt * The downside to this is that we can no longer fit everything in to a 32-bit
38f15cbe6fSPaul Mundt * PTE encoding, so a 64-bit pte_t is necessary for these parts. On the plus
39f15cbe6fSPaul Mundt * side, this gives us quite a few spare bits to play with for future usage.
40f15cbe6fSPaul Mundt */
41f15cbe6fSPaul Mundt /* Legacy and compat mode bits */
42f15cbe6fSPaul Mundt #define _PAGE_WT 0x001 /* WT-bit on SH-4, 0 on SH-3 */
43f15cbe6fSPaul Mundt #define _PAGE_HW_SHARED 0x002 /* SH-bit : shared among processes */
44f15cbe6fSPaul Mundt #define _PAGE_DIRTY 0x004 /* D-bit : page changed */
45f15cbe6fSPaul Mundt #define _PAGE_CACHABLE 0x008 /* C-bit : cachable */
46f15cbe6fSPaul Mundt #define _PAGE_SZ0 0x010 /* SZ0-bit : Size of page */
47f15cbe6fSPaul Mundt #define _PAGE_RW 0x020 /* PR0-bit : write access allowed */
48f15cbe6fSPaul Mundt #define _PAGE_USER 0x040 /* PR1-bit : user space access allowed*/
49f15cbe6fSPaul Mundt #define _PAGE_SZ1 0x080 /* SZ1-bit : Size of page (on SH-4) */
50f15cbe6fSPaul Mundt #define _PAGE_PRESENT 0x100 /* V-bit : page is valid */
51f15cbe6fSPaul Mundt #define _PAGE_PROTNONE 0x200 /* software: if not present */
52f15cbe6fSPaul Mundt #define _PAGE_ACCESSED 0x400 /* software: page referenced */
53c0b96cf6SPaul Mundt #define _PAGE_SPECIAL 0x800 /* software: special page */
54f15cbe6fSPaul Mundt
55f15cbe6fSPaul Mundt #define _PAGE_SZ_MASK (_PAGE_SZ0 | _PAGE_SZ1)
56f15cbe6fSPaul Mundt #define _PAGE_PR_MASK (_PAGE_RW | _PAGE_USER)
57f15cbe6fSPaul Mundt
58f15cbe6fSPaul Mundt /* Extended mode bits */
59f15cbe6fSPaul Mundt #define _PAGE_EXT_ESZ0 0x0010 /* ESZ0-bit: Size of page */
60f15cbe6fSPaul Mundt #define _PAGE_EXT_ESZ1 0x0020 /* ESZ1-bit: Size of page */
61f15cbe6fSPaul Mundt #define _PAGE_EXT_ESZ2 0x0040 /* ESZ2-bit: Size of page */
62f15cbe6fSPaul Mundt #define _PAGE_EXT_ESZ3 0x0080 /* ESZ3-bit: Size of page */
63f15cbe6fSPaul Mundt
64f15cbe6fSPaul Mundt #define _PAGE_EXT_USER_EXEC 0x0100 /* EPR0-bit: User space executable */
65f15cbe6fSPaul Mundt #define _PAGE_EXT_USER_WRITE 0x0200 /* EPR1-bit: User space writable */
66f15cbe6fSPaul Mundt #define _PAGE_EXT_USER_READ 0x0400 /* EPR2-bit: User space readable */
67f15cbe6fSPaul Mundt
68f15cbe6fSPaul Mundt #define _PAGE_EXT_KERN_EXEC 0x0800 /* EPR3-bit: Kernel space executable */
69f15cbe6fSPaul Mundt #define _PAGE_EXT_KERN_WRITE 0x1000 /* EPR4-bit: Kernel space writable */
70f15cbe6fSPaul Mundt #define _PAGE_EXT_KERN_READ 0x2000 /* EPR5-bit: Kernel space readable */
71f15cbe6fSPaul Mundt
728eda5514SMatt Fleming #define _PAGE_EXT_WIRED 0x4000 /* software: Wire TLB entry */
738eda5514SMatt Fleming
74f15cbe6fSPaul Mundt /* Wrapper for extended mode pgprot twiddling */
75f15cbe6fSPaul Mundt #define _PAGE_EXT(x) ((unsigned long long)(x) << 32)
76f15cbe6fSPaul Mundt
77efb3e34bSPaul Mundt #ifdef CONFIG_X2TLB
78efb3e34bSPaul Mundt #define _PAGE_PCC_MASK 0x00000000 /* No legacy PTEA support */
79efb3e34bSPaul Mundt #else
80efb3e34bSPaul Mundt
81f15cbe6fSPaul Mundt /* software: moves to PTEA.TC (Timing Control) */
82f15cbe6fSPaul Mundt #define _PAGE_PCC_AREA5 0x00000000 /* use BSC registers for area5 */
83f15cbe6fSPaul Mundt #define _PAGE_PCC_AREA6 0x80000000 /* use BSC registers for area6 */
84f15cbe6fSPaul Mundt
85f15cbe6fSPaul Mundt /* software: moves to PTEA.SA[2:0] (Space Attributes) */
86f15cbe6fSPaul Mundt #define _PAGE_PCC_IODYN 0x00000001 /* IO space, dynamically sized bus */
87f15cbe6fSPaul Mundt #define _PAGE_PCC_IO8 0x20000000 /* IO space, 8 bit bus */
88f15cbe6fSPaul Mundt #define _PAGE_PCC_IO16 0x20000001 /* IO space, 16 bit bus */
89f15cbe6fSPaul Mundt #define _PAGE_PCC_COM8 0x40000000 /* Common Memory space, 8 bit bus */
90f15cbe6fSPaul Mundt #define _PAGE_PCC_COM16 0x40000001 /* Common Memory space, 16 bit bus */
91f15cbe6fSPaul Mundt #define _PAGE_PCC_ATR8 0x60000000 /* Attribute Memory space, 8 bit bus */
92f15cbe6fSPaul Mundt #define _PAGE_PCC_ATR16 0x60000001 /* Attribute Memory space, 6 bit bus */
93f15cbe6fSPaul Mundt
94efb3e34bSPaul Mundt #define _PAGE_PCC_MASK 0xe0000001
95efb3e34bSPaul Mundt
966503fe4aSMichael Trimarchi /* copy the ptea attributes */
copy_ptea_attributes(unsigned long x)976503fe4aSMichael Trimarchi static inline unsigned long copy_ptea_attributes(unsigned long x)
986503fe4aSMichael Trimarchi {
996503fe4aSMichael Trimarchi return ((x >> 28) & 0xe) | (x & 0x1);
1006503fe4aSMichael Trimarchi }
1016503fe4aSMichael Trimarchi #endif
1026503fe4aSMichael Trimarchi
103f15cbe6fSPaul Mundt /* Mask which drops unused bits from the PTEL value */
104f15cbe6fSPaul Mundt #if defined(CONFIG_CPU_SH3)
105f15cbe6fSPaul Mundt #define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED| \
1068b70beacSKirill A. Shutemov _PAGE_SZ1 | _PAGE_HW_SHARED)
107f15cbe6fSPaul Mundt #elif defined(CONFIG_X2TLB)
108f15cbe6fSPaul Mundt /* Get rid of the legacy PR/SZ bits when using extended mode */
109f15cbe6fSPaul Mundt #define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED | \
1108b70beacSKirill A. Shutemov _PAGE_PR_MASK | _PAGE_SZ_MASK)
111f15cbe6fSPaul Mundt #else
1128b70beacSKirill A. Shutemov #define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED)
113f15cbe6fSPaul Mundt #endif
114f15cbe6fSPaul Mundt
1151f69b6afSMatt Fleming #define _PAGE_FLAGS_HARDWARE_MASK (phys_addr_mask() & ~(_PAGE_CLEAR_FLAGS))
116f15cbe6fSPaul Mundt
117f15cbe6fSPaul Mundt /* Hardware flags, page size encoding */
118f15cbe6fSPaul Mundt #if !defined(CONFIG_MMU)
119f15cbe6fSPaul Mundt # define _PAGE_FLAGS_HARD 0ULL
120f15cbe6fSPaul Mundt #elif defined(CONFIG_X2TLB)
121f15cbe6fSPaul Mundt # if defined(CONFIG_PAGE_SIZE_4KB)
122f15cbe6fSPaul Mundt # define _PAGE_FLAGS_HARD _PAGE_EXT(_PAGE_EXT_ESZ0)
123f15cbe6fSPaul Mundt # elif defined(CONFIG_PAGE_SIZE_8KB)
124f15cbe6fSPaul Mundt # define _PAGE_FLAGS_HARD _PAGE_EXT(_PAGE_EXT_ESZ1)
125f15cbe6fSPaul Mundt # elif defined(CONFIG_PAGE_SIZE_64KB)
126f15cbe6fSPaul Mundt # define _PAGE_FLAGS_HARD _PAGE_EXT(_PAGE_EXT_ESZ2)
127f15cbe6fSPaul Mundt # endif
128f15cbe6fSPaul Mundt #else
129f15cbe6fSPaul Mundt # if defined(CONFIG_PAGE_SIZE_4KB)
130f15cbe6fSPaul Mundt # define _PAGE_FLAGS_HARD _PAGE_SZ0
131f15cbe6fSPaul Mundt # elif defined(CONFIG_PAGE_SIZE_64KB)
132f15cbe6fSPaul Mundt # define _PAGE_FLAGS_HARD _PAGE_SZ1
133f15cbe6fSPaul Mundt # endif
134f15cbe6fSPaul Mundt #endif
135f15cbe6fSPaul Mundt
136f15cbe6fSPaul Mundt #if defined(CONFIG_X2TLB)
137f15cbe6fSPaul Mundt # if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
138f15cbe6fSPaul Mundt # define _PAGE_SZHUGE (_PAGE_EXT_ESZ2)
139f15cbe6fSPaul Mundt # elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K)
140f15cbe6fSPaul Mundt # define _PAGE_SZHUGE (_PAGE_EXT_ESZ0 | _PAGE_EXT_ESZ2)
141f15cbe6fSPaul Mundt # elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
142f15cbe6fSPaul Mundt # define _PAGE_SZHUGE (_PAGE_EXT_ESZ0 | _PAGE_EXT_ESZ1 | _PAGE_EXT_ESZ2)
143f15cbe6fSPaul Mundt # elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
144f15cbe6fSPaul Mundt # define _PAGE_SZHUGE (_PAGE_EXT_ESZ3)
145f15cbe6fSPaul Mundt # elif defined(CONFIG_HUGETLB_PAGE_SIZE_64MB)
146f15cbe6fSPaul Mundt # define _PAGE_SZHUGE (_PAGE_EXT_ESZ2 | _PAGE_EXT_ESZ3)
147f15cbe6fSPaul Mundt # endif
148046581f9SPaul Mundt # define _PAGE_WIRED (_PAGE_EXT(_PAGE_EXT_WIRED))
149f15cbe6fSPaul Mundt #else
150f15cbe6fSPaul Mundt # if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
151f15cbe6fSPaul Mundt # define _PAGE_SZHUGE (_PAGE_SZ1)
152f15cbe6fSPaul Mundt # elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
153f15cbe6fSPaul Mundt # define _PAGE_SZHUGE (_PAGE_SZ0 | _PAGE_SZ1)
154f15cbe6fSPaul Mundt # endif
155046581f9SPaul Mundt # define _PAGE_WIRED (0)
156f15cbe6fSPaul Mundt #endif
157f15cbe6fSPaul Mundt
158f15cbe6fSPaul Mundt /*
159f15cbe6fSPaul Mundt * Stub out _PAGE_SZHUGE if we don't have a good definition for it,
160f15cbe6fSPaul Mundt * to make pte_mkhuge() happy.
161f15cbe6fSPaul Mundt */
162f15cbe6fSPaul Mundt #ifndef _PAGE_SZHUGE
163f15cbe6fSPaul Mundt # define _PAGE_SZHUGE (_PAGE_FLAGS_HARD)
164f15cbe6fSPaul Mundt #endif
165f15cbe6fSPaul Mundt
166c0b96cf6SPaul Mundt /*
16725985edcSLucas De Marchi * Mask of bits that are to be preserved across pgprot changes.
168c0b96cf6SPaul Mundt */
169f15cbe6fSPaul Mundt #define _PAGE_CHG_MASK \
170c0b96cf6SPaul Mundt (PTE_MASK | _PAGE_ACCESSED | _PAGE_CACHABLE | \
171c0b96cf6SPaul Mundt _PAGE_DIRTY | _PAGE_SPECIAL)
172f15cbe6fSPaul Mundt
173f15cbe6fSPaul Mundt #ifndef __ASSEMBLY__
174f15cbe6fSPaul Mundt
175f15cbe6fSPaul Mundt #if defined(CONFIG_X2TLB) /* SH-X2 TLB */
176f15cbe6fSPaul Mundt #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_CACHABLE | \
177f15cbe6fSPaul Mundt _PAGE_ACCESSED | _PAGE_FLAGS_HARD)
178f15cbe6fSPaul Mundt
179f15cbe6fSPaul Mundt #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \
180f15cbe6fSPaul Mundt _PAGE_CACHABLE | _PAGE_FLAGS_HARD | \
181f15cbe6fSPaul Mundt _PAGE_EXT(_PAGE_EXT_KERN_READ | \
182f15cbe6fSPaul Mundt _PAGE_EXT_KERN_WRITE | \
183f15cbe6fSPaul Mundt _PAGE_EXT_USER_READ | \
184f15cbe6fSPaul Mundt _PAGE_EXT_USER_WRITE))
185f15cbe6fSPaul Mundt
186f15cbe6fSPaul Mundt #define PAGE_EXECREAD __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \
187f15cbe6fSPaul Mundt _PAGE_CACHABLE | _PAGE_FLAGS_HARD | \
188f15cbe6fSPaul Mundt _PAGE_EXT(_PAGE_EXT_KERN_EXEC | \
189f15cbe6fSPaul Mundt _PAGE_EXT_KERN_READ | \
190f15cbe6fSPaul Mundt _PAGE_EXT_USER_EXEC | \
191f15cbe6fSPaul Mundt _PAGE_EXT_USER_READ))
192f15cbe6fSPaul Mundt
193f15cbe6fSPaul Mundt #define PAGE_COPY PAGE_EXECREAD
194f15cbe6fSPaul Mundt
195f15cbe6fSPaul Mundt #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \
196f15cbe6fSPaul Mundt _PAGE_CACHABLE | _PAGE_FLAGS_HARD | \
197f15cbe6fSPaul Mundt _PAGE_EXT(_PAGE_EXT_KERN_READ | \
198f15cbe6fSPaul Mundt _PAGE_EXT_USER_READ))
199f15cbe6fSPaul Mundt
200f15cbe6fSPaul Mundt #define PAGE_WRITEONLY __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \
201f15cbe6fSPaul Mundt _PAGE_CACHABLE | _PAGE_FLAGS_HARD | \
202f15cbe6fSPaul Mundt _PAGE_EXT(_PAGE_EXT_KERN_WRITE | \
203f15cbe6fSPaul Mundt _PAGE_EXT_USER_WRITE))
204f15cbe6fSPaul Mundt
205f15cbe6fSPaul Mundt #define PAGE_RWX __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \
206f15cbe6fSPaul Mundt _PAGE_CACHABLE | _PAGE_FLAGS_HARD | \
207f15cbe6fSPaul Mundt _PAGE_EXT(_PAGE_EXT_KERN_WRITE | \
208f15cbe6fSPaul Mundt _PAGE_EXT_KERN_READ | \
209f15cbe6fSPaul Mundt _PAGE_EXT_KERN_EXEC | \
210f15cbe6fSPaul Mundt _PAGE_EXT_USER_WRITE | \
211f15cbe6fSPaul Mundt _PAGE_EXT_USER_READ | \
212f15cbe6fSPaul Mundt _PAGE_EXT_USER_EXEC))
213f15cbe6fSPaul Mundt
214f15cbe6fSPaul Mundt #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_CACHABLE | \
215f15cbe6fSPaul Mundt _PAGE_DIRTY | _PAGE_ACCESSED | \
216f15cbe6fSPaul Mundt _PAGE_HW_SHARED | _PAGE_FLAGS_HARD | \
217f15cbe6fSPaul Mundt _PAGE_EXT(_PAGE_EXT_KERN_READ | \
218f15cbe6fSPaul Mundt _PAGE_EXT_KERN_WRITE | \
219f15cbe6fSPaul Mundt _PAGE_EXT_KERN_EXEC))
220f15cbe6fSPaul Mundt
221f15cbe6fSPaul Mundt #define PAGE_KERNEL_NOCACHE \
222f15cbe6fSPaul Mundt __pgprot(_PAGE_PRESENT | _PAGE_DIRTY | \
223f15cbe6fSPaul Mundt _PAGE_ACCESSED | _PAGE_HW_SHARED | \
224f15cbe6fSPaul Mundt _PAGE_FLAGS_HARD | \
225f15cbe6fSPaul Mundt _PAGE_EXT(_PAGE_EXT_KERN_READ | \
226f15cbe6fSPaul Mundt _PAGE_EXT_KERN_WRITE | \
227f15cbe6fSPaul Mundt _PAGE_EXT_KERN_EXEC))
228f15cbe6fSPaul Mundt
229f15cbe6fSPaul Mundt #define PAGE_KERNEL_RO __pgprot(_PAGE_PRESENT | _PAGE_CACHABLE | \
230f15cbe6fSPaul Mundt _PAGE_DIRTY | _PAGE_ACCESSED | \
231f15cbe6fSPaul Mundt _PAGE_HW_SHARED | _PAGE_FLAGS_HARD | \
232f15cbe6fSPaul Mundt _PAGE_EXT(_PAGE_EXT_KERN_READ | \
233f15cbe6fSPaul Mundt _PAGE_EXT_KERN_EXEC))
234f15cbe6fSPaul Mundt
235f15cbe6fSPaul Mundt #define PAGE_KERNEL_PCC(slot, type) \
23611e1ed6eSPaul Mundt __pgprot(0)
237f15cbe6fSPaul Mundt
238f15cbe6fSPaul Mundt #elif defined(CONFIG_MMU) /* SH-X TLB */
239f15cbe6fSPaul Mundt #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_CACHABLE | \
240f15cbe6fSPaul Mundt _PAGE_ACCESSED | _PAGE_FLAGS_HARD)
241f15cbe6fSPaul Mundt
242f15cbe6fSPaul Mundt #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
243f15cbe6fSPaul Mundt _PAGE_CACHABLE | _PAGE_ACCESSED | \
244f15cbe6fSPaul Mundt _PAGE_FLAGS_HARD)
245f15cbe6fSPaul Mundt
246f15cbe6fSPaul Mundt #define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_CACHABLE | \
247f15cbe6fSPaul Mundt _PAGE_ACCESSED | _PAGE_FLAGS_HARD)
248f15cbe6fSPaul Mundt
249f15cbe6fSPaul Mundt #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_CACHABLE | \
250f15cbe6fSPaul Mundt _PAGE_ACCESSED | _PAGE_FLAGS_HARD)
251f15cbe6fSPaul Mundt
252f15cbe6fSPaul Mundt #define PAGE_EXECREAD PAGE_READONLY
253f15cbe6fSPaul Mundt #define PAGE_RWX PAGE_SHARED
254f15cbe6fSPaul Mundt #define PAGE_WRITEONLY PAGE_SHARED
255f15cbe6fSPaul Mundt
256f15cbe6fSPaul Mundt #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_CACHABLE | \
257f15cbe6fSPaul Mundt _PAGE_DIRTY | _PAGE_ACCESSED | \
258f15cbe6fSPaul Mundt _PAGE_HW_SHARED | _PAGE_FLAGS_HARD)
259f15cbe6fSPaul Mundt
260f15cbe6fSPaul Mundt #define PAGE_KERNEL_NOCACHE \
261f15cbe6fSPaul Mundt __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | \
262f15cbe6fSPaul Mundt _PAGE_ACCESSED | _PAGE_HW_SHARED | \
263f15cbe6fSPaul Mundt _PAGE_FLAGS_HARD)
264f15cbe6fSPaul Mundt
265f15cbe6fSPaul Mundt #define PAGE_KERNEL_RO __pgprot(_PAGE_PRESENT | _PAGE_CACHABLE | \
266f15cbe6fSPaul Mundt _PAGE_DIRTY | _PAGE_ACCESSED | \
267f15cbe6fSPaul Mundt _PAGE_HW_SHARED | _PAGE_FLAGS_HARD)
268f15cbe6fSPaul Mundt
269f15cbe6fSPaul Mundt #define PAGE_KERNEL_PCC(slot, type) \
270f15cbe6fSPaul Mundt __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | \
271f15cbe6fSPaul Mundt _PAGE_ACCESSED | _PAGE_FLAGS_HARD | \
272f15cbe6fSPaul Mundt (slot ? _PAGE_PCC_AREA5 : _PAGE_PCC_AREA6) | \
273f15cbe6fSPaul Mundt (type))
274f15cbe6fSPaul Mundt #else /* no mmu */
275f15cbe6fSPaul Mundt #define PAGE_NONE __pgprot(0)
276f15cbe6fSPaul Mundt #define PAGE_SHARED __pgprot(0)
277f15cbe6fSPaul Mundt #define PAGE_COPY __pgprot(0)
278f15cbe6fSPaul Mundt #define PAGE_EXECREAD __pgprot(0)
279f15cbe6fSPaul Mundt #define PAGE_RWX __pgprot(0)
280f15cbe6fSPaul Mundt #define PAGE_READONLY __pgprot(0)
281f15cbe6fSPaul Mundt #define PAGE_WRITEONLY __pgprot(0)
282f15cbe6fSPaul Mundt #define PAGE_KERNEL __pgprot(0)
283f15cbe6fSPaul Mundt #define PAGE_KERNEL_NOCACHE __pgprot(0)
284f15cbe6fSPaul Mundt #define PAGE_KERNEL_RO __pgprot(0)
285f15cbe6fSPaul Mundt
286f15cbe6fSPaul Mundt #define PAGE_KERNEL_PCC(slot, type) \
287f15cbe6fSPaul Mundt __pgprot(0)
288f15cbe6fSPaul Mundt #endif
289f15cbe6fSPaul Mundt
290f15cbe6fSPaul Mundt #endif /* __ASSEMBLY__ */
291f15cbe6fSPaul Mundt
292f15cbe6fSPaul Mundt #ifndef __ASSEMBLY__
293f15cbe6fSPaul Mundt
294f15cbe6fSPaul Mundt /*
295f15cbe6fSPaul Mundt * Certain architectures need to do special things when PTEs
296f15cbe6fSPaul Mundt * within a page table are directly modified. Thus, the following
297f15cbe6fSPaul Mundt * hook is made available.
298f15cbe6fSPaul Mundt */
299f15cbe6fSPaul Mundt #ifdef CONFIG_X2TLB
set_pte(pte_t * ptep,pte_t pte)300f15cbe6fSPaul Mundt static inline void set_pte(pte_t *ptep, pte_t pte)
301f15cbe6fSPaul Mundt {
302f15cbe6fSPaul Mundt ptep->pte_high = pte.pte_high;
303f15cbe6fSPaul Mundt smp_wmb();
304f15cbe6fSPaul Mundt ptep->pte_low = pte.pte_low;
305f15cbe6fSPaul Mundt }
306f15cbe6fSPaul Mundt #else
307f15cbe6fSPaul Mundt #define set_pte(pteptr, pteval) (*(pteptr) = pteval)
308f15cbe6fSPaul Mundt #endif
309f15cbe6fSPaul Mundt
310f15cbe6fSPaul Mundt /*
311f15cbe6fSPaul Mundt * (pmds are folded into pgds so this doesn't get actually called,
312f15cbe6fSPaul Mundt * but the define is needed for a generic inline function.)
313f15cbe6fSPaul Mundt */
314f15cbe6fSPaul Mundt #define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
315f15cbe6fSPaul Mundt
316*157efa29SMatthew Wilcox (Oracle) #define PFN_PTE_SHIFT PAGE_SHIFT
317f15cbe6fSPaul Mundt #define pfn_pte(pfn, prot) \
318f15cbe6fSPaul Mundt __pte(((unsigned long long)(pfn) << PAGE_SHIFT) | pgprot_val(prot))
319f15cbe6fSPaul Mundt #define pfn_pmd(pfn, prot) \
320f15cbe6fSPaul Mundt __pmd(((unsigned long long)(pfn) << PAGE_SHIFT) | pgprot_val(prot))
321f15cbe6fSPaul Mundt
322f15cbe6fSPaul Mundt #define pte_none(x) (!pte_val(x))
323f15cbe6fSPaul Mundt #define pte_present(x) ((x).pte_low & (_PAGE_PRESENT | _PAGE_PROTNONE))
324f15cbe6fSPaul Mundt
325*157efa29SMatthew Wilcox (Oracle) #define pte_clear(mm, addr, ptep) set_pte(ptep, __pte(0))
326f15cbe6fSPaul Mundt
327f15cbe6fSPaul Mundt #define pmd_none(x) (!pmd_val(x))
328f15cbe6fSPaul Mundt #define pmd_present(x) (pmd_val(x))
329f15cbe6fSPaul Mundt #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
330f15cbe6fSPaul Mundt #define pmd_bad(x) (pmd_val(x) & ~PAGE_MASK)
331f15cbe6fSPaul Mundt
332f15cbe6fSPaul Mundt #define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
333f15cbe6fSPaul Mundt #define pte_page(x) pfn_to_page(pte_pfn(x))
334f15cbe6fSPaul Mundt
335f15cbe6fSPaul Mundt /*
336f15cbe6fSPaul Mundt * The following only work if pte_present() is true.
337f15cbe6fSPaul Mundt * Undefined behaviour if not..
338f15cbe6fSPaul Mundt */
339f15cbe6fSPaul Mundt #define pte_not_present(pte) (!((pte).pte_low & _PAGE_PRESENT))
340f15cbe6fSPaul Mundt #define pte_dirty(pte) ((pte).pte_low & _PAGE_DIRTY)
341f15cbe6fSPaul Mundt #define pte_young(pte) ((pte).pte_low & _PAGE_ACCESSED)
342c0b96cf6SPaul Mundt #define pte_special(pte) ((pte).pte_low & _PAGE_SPECIAL)
343f15cbe6fSPaul Mundt
344f15cbe6fSPaul Mundt #ifdef CONFIG_X2TLB
345fcb4ebd6SMatt Fleming #define pte_write(pte) \
346fcb4ebd6SMatt Fleming ((pte).pte_high & (_PAGE_EXT_USER_WRITE | _PAGE_EXT_KERN_WRITE))
347f15cbe6fSPaul Mundt #else
348f15cbe6fSPaul Mundt #define pte_write(pte) ((pte).pte_low & _PAGE_RW)
349f15cbe6fSPaul Mundt #endif
350f15cbe6fSPaul Mundt
351f15cbe6fSPaul Mundt #define PTE_BIT_FUNC(h,fn,op) \
352f15cbe6fSPaul Mundt static inline pte_t pte_##fn(pte_t pte) { pte.pte_##h op; return pte; }
353f15cbe6fSPaul Mundt
354f15cbe6fSPaul Mundt #ifdef CONFIG_X2TLB
355f15cbe6fSPaul Mundt /*
356f15cbe6fSPaul Mundt * We cheat a bit in the SH-X2 TLB case. As the permission bits are
357f15cbe6fSPaul Mundt * individually toggled (and user permissions are entirely decoupled from
358f15cbe6fSPaul Mundt * kernel permissions), we attempt to couple them a bit more sanely here.
359f15cbe6fSPaul Mundt */
360fcb4ebd6SMatt Fleming PTE_BIT_FUNC(high, wrprotect, &= ~(_PAGE_EXT_USER_WRITE | _PAGE_EXT_KERN_WRITE));
3612f0584f3SRick Edgecombe PTE_BIT_FUNC(high, mkwrite_novma, |= _PAGE_EXT_USER_WRITE | _PAGE_EXT_KERN_WRITE);
362f15cbe6fSPaul Mundt PTE_BIT_FUNC(high, mkhuge, |= _PAGE_SZHUGE);
363f15cbe6fSPaul Mundt #else
364f15cbe6fSPaul Mundt PTE_BIT_FUNC(low, wrprotect, &= ~_PAGE_RW);
3652f0584f3SRick Edgecombe PTE_BIT_FUNC(low, mkwrite_novma, |= _PAGE_RW);
366f15cbe6fSPaul Mundt PTE_BIT_FUNC(low, mkhuge, |= _PAGE_SZHUGE);
367f15cbe6fSPaul Mundt #endif
368f15cbe6fSPaul Mundt
369f15cbe6fSPaul Mundt PTE_BIT_FUNC(low, mkclean, &= ~_PAGE_DIRTY);
370f15cbe6fSPaul Mundt PTE_BIT_FUNC(low, mkdirty, |= _PAGE_DIRTY);
371f15cbe6fSPaul Mundt PTE_BIT_FUNC(low, mkold, &= ~_PAGE_ACCESSED);
372f15cbe6fSPaul Mundt PTE_BIT_FUNC(low, mkyoung, |= _PAGE_ACCESSED);
373c0b96cf6SPaul Mundt PTE_BIT_FUNC(low, mkspecial, |= _PAGE_SPECIAL);
374f15cbe6fSPaul Mundt
375f15cbe6fSPaul Mundt /*
376f15cbe6fSPaul Mundt * Macro and implementation to make a page protection as uncachable.
377f15cbe6fSPaul Mundt */
378f15cbe6fSPaul Mundt #define pgprot_writecombine(prot) \
379f15cbe6fSPaul Mundt __pgprot(pgprot_val(prot) & ~_PAGE_CACHABLE)
380f15cbe6fSPaul Mundt
381f15cbe6fSPaul Mundt #define pgprot_noncached pgprot_writecombine
382f15cbe6fSPaul Mundt
383f15cbe6fSPaul Mundt /*
384f15cbe6fSPaul Mundt * Conversion functions: convert a page and protection to a page entry,
385f15cbe6fSPaul Mundt * and a page entry and page directory to the page they refer to.
386f15cbe6fSPaul Mundt *
387f15cbe6fSPaul Mundt * extern pte_t mk_pte(struct page *page, pgprot_t pgprot)
388f15cbe6fSPaul Mundt */
389f15cbe6fSPaul Mundt #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
390f15cbe6fSPaul Mundt
pte_modify(pte_t pte,pgprot_t newprot)391f15cbe6fSPaul Mundt static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
392f15cbe6fSPaul Mundt {
393f15cbe6fSPaul Mundt pte.pte_low &= _PAGE_CHG_MASK;
394f15cbe6fSPaul Mundt pte.pte_low |= pgprot_val(newprot);
395f15cbe6fSPaul Mundt
396f15cbe6fSPaul Mundt #ifdef CONFIG_X2TLB
397f15cbe6fSPaul Mundt pte.pte_high |= pgprot_val(newprot) >> 32;
398f15cbe6fSPaul Mundt #endif
399f15cbe6fSPaul Mundt
400f15cbe6fSPaul Mundt return pte;
401f15cbe6fSPaul Mundt }
402f15cbe6fSPaul Mundt
pmd_page_vaddr(pmd_t pmd)403974b9b2cSMike Rapoport static inline unsigned long pmd_page_vaddr(pmd_t pmd)
404974b9b2cSMike Rapoport {
405974b9b2cSMike Rapoport return (unsigned long)pmd_val(pmd);
406974b9b2cSMike Rapoport }
407974b9b2cSMike Rapoport
4087106c51eSMike Rapoport #define pmd_pfn(pmd) (__pa(pmd_val(pmd)) >> PAGE_SHIFT)
409f15cbe6fSPaul Mundt #define pmd_page(pmd) (virt_to_page(pmd_val(pmd)))
410f15cbe6fSPaul Mundt
411f15cbe6fSPaul Mundt #ifdef CONFIG_X2TLB
412f15cbe6fSPaul Mundt #define pte_ERROR(e) \
413f15cbe6fSPaul Mundt printk("%s:%d: bad pte %p(%08lx%08lx).\n", __FILE__, __LINE__, \
414f15cbe6fSPaul Mundt &(e), (e).pte_high, (e).pte_low)
415f15cbe6fSPaul Mundt #define pgd_ERROR(e) \
416f15cbe6fSPaul Mundt printk("%s:%d: bad pgd %016llx.\n", __FILE__, __LINE__, pgd_val(e))
417f15cbe6fSPaul Mundt #else
418f15cbe6fSPaul Mundt #define pte_ERROR(e) \
419f15cbe6fSPaul Mundt printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
420f15cbe6fSPaul Mundt #define pgd_ERROR(e) \
421f15cbe6fSPaul Mundt printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
422f15cbe6fSPaul Mundt #endif
423f15cbe6fSPaul Mundt
424f15cbe6fSPaul Mundt /*
425cca10df1SDavid Hildenbrand * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that
426cca10df1SDavid Hildenbrand * are !pte_none() && !pte_present().
427f15cbe6fSPaul Mundt *
428f15cbe6fSPaul Mundt * Constraints:
429f15cbe6fSPaul Mundt * _PAGE_PRESENT at bit 8
430f15cbe6fSPaul Mundt * _PAGE_PROTNONE at bit 9
431f15cbe6fSPaul Mundt *
432cca10df1SDavid Hildenbrand * For the normal case, we encode the swap type and offset into the swap PTE
433cca10df1SDavid Hildenbrand * such that bits 8 and 9 stay zero. For the 64-bit PTE case, we use the
434cca10df1SDavid Hildenbrand * upper 32 for the swap offset and swap type, following the same approach as
435cca10df1SDavid Hildenbrand * x86 PAE. This keeps the logic quite simple.
436f15cbe6fSPaul Mundt *
437f15cbe6fSPaul Mundt * As is evident by the Alpha code, if we ever get a 64-bit unsigned
438f15cbe6fSPaul Mundt * long (swp_entry_t) to match up with the 64-bit PTEs, this all becomes
439f15cbe6fSPaul Mundt * much cleaner..
440f15cbe6fSPaul Mundt */
441cca10df1SDavid Hildenbrand
442f15cbe6fSPaul Mundt #ifdef CONFIG_X2TLB
443cca10df1SDavid Hildenbrand /*
444cca10df1SDavid Hildenbrand * Format of swap PTEs:
445cca10df1SDavid Hildenbrand *
446cca10df1SDavid Hildenbrand * 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
447cca10df1SDavid Hildenbrand * 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
448cca10df1SDavid Hildenbrand * <--------------------- offset ----------------------> < type ->
449cca10df1SDavid Hildenbrand *
450cca10df1SDavid Hildenbrand * 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
451cca10df1SDavid Hildenbrand * 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
452cca10df1SDavid Hildenbrand * <------------------- zeroes --------------------> E 0 0 0 0 0 0
453cca10df1SDavid Hildenbrand */
454f15cbe6fSPaul Mundt #define __swp_type(x) ((x).val & 0x1f)
455f15cbe6fSPaul Mundt #define __swp_offset(x) ((x).val >> 5)
456cca10df1SDavid Hildenbrand #define __swp_entry(type, offset) ((swp_entry_t){ ((type) & 0x1f) | (offset) << 5})
457f15cbe6fSPaul Mundt #define __pte_to_swp_entry(pte) ((swp_entry_t){ (pte).pte_high })
458f15cbe6fSPaul Mundt #define __swp_entry_to_pte(x) ((pte_t){ 0, (x).val })
459f15cbe6fSPaul Mundt
460f15cbe6fSPaul Mundt #else
461cca10df1SDavid Hildenbrand /*
462cca10df1SDavid Hildenbrand * Format of swap PTEs:
463cca10df1SDavid Hildenbrand *
464cca10df1SDavid Hildenbrand * 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
465cca10df1SDavid Hildenbrand * 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
466cca10df1SDavid Hildenbrand * <--------------- offset ----------------> 0 0 0 0 E < type -> 0
467cca10df1SDavid Hildenbrand *
468cca10df1SDavid Hildenbrand * E is the exclusive marker that is not stored in swap entries.
469cca10df1SDavid Hildenbrand */
470cca10df1SDavid Hildenbrand #define __swp_type(x) ((x).val & 0x1f)
471f15cbe6fSPaul Mundt #define __swp_offset(x) ((x).val >> 10)
472cca10df1SDavid Hildenbrand #define __swp_entry(type, offset) ((swp_entry_t){((type) & 0x1f) | (offset) << 10})
473f15cbe6fSPaul Mundt
474f15cbe6fSPaul Mundt #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 1 })
475f15cbe6fSPaul Mundt #define __swp_entry_to_pte(x) ((pte_t) { (x).val << 1 })
476f15cbe6fSPaul Mundt #endif
477f15cbe6fSPaul Mundt
478cca10df1SDavid Hildenbrand /* In both cases, we borrow bit 6 to store the exclusive marker in swap PTEs. */
479cca10df1SDavid Hildenbrand #define _PAGE_SWP_EXCLUSIVE _PAGE_USER
480cca10df1SDavid Hildenbrand
pte_swp_exclusive(pte_t pte)481cca10df1SDavid Hildenbrand static inline int pte_swp_exclusive(pte_t pte)
482cca10df1SDavid Hildenbrand {
483cca10df1SDavid Hildenbrand return pte.pte_low & _PAGE_SWP_EXCLUSIVE;
484cca10df1SDavid Hildenbrand }
485cca10df1SDavid Hildenbrand
486cca10df1SDavid Hildenbrand PTE_BIT_FUNC(low, swp_mkexclusive, |= _PAGE_SWP_EXCLUSIVE);
487cca10df1SDavid Hildenbrand PTE_BIT_FUNC(low, swp_clear_exclusive, &= ~_PAGE_SWP_EXCLUSIVE);
488cca10df1SDavid Hildenbrand
489f15cbe6fSPaul Mundt #endif /* __ASSEMBLY__ */
490f15cbe6fSPaul Mundt #endif /* __ASM_SH_PGTABLE_32_H */
491