arch/nds32/include/asm/pgtable.h:360:44: error: passing argument 1 of 'pmd_offset' from incompatible pointer type

From: kbuild test robot
Date: Sat Dec 21 2019 - 08:15:27 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f1fd1610cbb6655883d1838ac79e53301596685d
commit: 7c2763c42326a071220077513a9cae90db46b818 nds32: use pgtable-nopmd instead of 4level-fixup
date: 2 weeks ago
config: nds32-randconfig-a001-20191217 (attached as .config)
compiler: nds32le-linux-gcc (GCC) 9.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout 7c2763c42326a071220077513a9cae90db46b818
# save the attached .config to linux build tree
GCC_VERSION=9.2.0 make.cross ARCH=nds32

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@xxxxxxxxx>

All error/warnings (new ones prefixed by >>):

In file included from arch/nds32/include/asm/cacheflush.h:43,
from include/linux/highmem.h:12,
from arch/nds32/mm/highmem.c:5:
include/asm-generic/cacheflush.h:50:20: error: static declaration of 'flush_icache_range' follows non-static declaration
50 | static inline void flush_icache_range(unsigned long start, unsigned long end)
| ^~~~~~~~~~~~~~~~~~
In file included from include/linux/highmem.h:12,
from arch/nds32/mm/highmem.c:5:
arch/nds32/include/asm/cacheflush.h:11:6: note: previous declaration of 'flush_icache_range' was here
11 | void flush_icache_range(unsigned long start, unsigned long end);
| ^~~~~~~~~~~~~~~~~~
In file included from arch/nds32/include/asm/cacheflush.h:43,
from include/linux/highmem.h:12,
from arch/nds32/mm/highmem.c:5:
include/asm-generic/cacheflush.h:54:20: error: static declaration of 'flush_icache_page' follows non-static declaration
54 | static inline void flush_icache_page(struct vm_area_struct *vma,
| ^~~~~~~~~~~~~~~~~
In file included from include/linux/highmem.h:12,
from arch/nds32/mm/highmem.c:5:
arch/nds32/include/asm/cacheflush.h:12:6: note: previous declaration of 'flush_icache_page' was here
12 | void flush_icache_page(struct vm_area_struct *vma, struct page *page);
| ^~~~~~~~~~~~~~~~~
In file included from arch/nds32/include/asm/page.h:57,
from include/linux/mm_types_task.h:16,
from include/linux/mm_types.h:5,
from include/linux/mmzone.h:21,
from include/linux/gfp.h:6,
from include/linux/xarray.h:14,
from include/linux/radix-tree.h:18,
from include/linux/fs.h:15,
from include/linux/highmem.h:5,
from arch/nds32/mm/highmem.c:5:
arch/nds32/mm/highmem.c: In function 'kmap_atomic':
>> arch/nds32/include/asm/pgtable.h:360:44: error: passing argument 1 of 'pmd_offset' from incompatible pointer type [-Werror=incompatible-pointer-types]
360 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
| ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
| |
| pgd_t * {aka long unsigned int *}
arch/nds32/include/asm/memory.h:33:29: note: in definition of macro '__phys_to_virt'
33 | #define __phys_to_virt(x) ((x) - PHYS_OFFSET + PAGE_OFFSET)
| ^
>> arch/nds32/include/asm/pgtable.h:193:55: note: in expansion of macro '__va'
193 | #define pmd_page_kernel(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
| ^~~~
>> include/asm-generic/pgtable-nop4d.h:41:24: note: in expansion of macro 'pgd_val'
41 | #define p4d_val(x) (pgd_val((x).pgd))
| ^~~~~~~
>> include/asm-generic/pgtable-nopud.h:50:24: note: in expansion of macro 'p4d_val'
50 | #define pud_val(x) (p4d_val((x).p4d))
| ^~~~~~~
>> include/asm-generic/pgtable-nopmd.h:49:24: note: in expansion of macro 'pud_val'
49 | #define pmd_val(x) (pud_val((x).pud))
| ^~~~~~~
>> arch/nds32/include/asm/pgtable.h:193:60: note: in expansion of macro 'pmd_val'
193 | #define pmd_page_kernel(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
| ^~~~~~~
>> arch/nds32/include/asm/pgtable.h:190:56: note: in expansion of macro 'pmd_page_kernel'
190 | #define pte_offset_kernel(dir, address) ((pte_t *)pmd_page_kernel(*(dir)) + pte_index(address))
| ^~~~~~~~~~~~~~~
>> arch/nds32/mm/highmem.c:52:9: note: in expansion of macro 'pte_offset_kernel'
52 | ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
| ^~~~~~~~~~~~~~~~~
>> arch/nds32/include/asm/pgtable.h:362:33: note: in expansion of macro 'pgd_offset'
362 | #define pgd_offset_k(addr) pgd_offset(&init_mm, addr)
| ^~~~~~~~~~
>> arch/nds32/include/asm/pgtable.h:198:39: note: in expansion of macro 'pgd_offset_k'
198 | #define pmd_off_k(address) pmd_offset(pgd_offset_k(address), address)
| ^~~~~~~~~~~~
>> arch/nds32/mm/highmem.c:52:27: note: in expansion of macro 'pmd_off_k'
52 | ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
| ^~~~~~~~~
In file included from arch/nds32/include/asm/pgtable.h:7,
from include/linux/mm.h:99,
from include/linux/highmem.h:8,
from arch/nds32/mm/highmem.c:5:
include/asm-generic/pgtable-nopmd.h:44:42: note: expected 'pud_t *' {aka 'struct <anonymous> *'} but argument is of type 'pgd_t *' {aka 'long unsigned int *'}
44 | static inline pmd_t * pmd_offset(pud_t * pud, unsigned long address)
| ~~~~~~~~^~~
In file included from arch/nds32/include/asm/page.h:57,
from include/linux/mm_types_task.h:16,
from include/linux/mm_types.h:5,
from include/linux/mmzone.h:21,
from include/linux/gfp.h:6,
from include/linux/xarray.h:14,
from include/linux/radix-tree.h:18,
from include/linux/fs.h:15,
from include/linux/highmem.h:5,
from arch/nds32/mm/highmem.c:5:
arch/nds32/mm/highmem.c: In function '__kunmap_atomic':
>> arch/nds32/include/asm/pgtable.h:360:44: error: passing argument 1 of 'pmd_offset' from incompatible pointer type [-Werror=incompatible-pointer-types]
360 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
| ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
| |
| pgd_t * {aka long unsigned int *}
arch/nds32/include/asm/memory.h:33:29: note: in definition of macro '__phys_to_virt'
33 | #define __phys_to_virt(x) ((x) - PHYS_OFFSET + PAGE_OFFSET)
| ^
>> arch/nds32/include/asm/pgtable.h:193:55: note: in expansion of macro '__va'
193 | #define pmd_page_kernel(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
| ^~~~
>> include/asm-generic/pgtable-nop4d.h:41:24: note: in expansion of macro 'pgd_val'
41 | #define p4d_val(x) (pgd_val((x).pgd))
| ^~~~~~~
>> include/asm-generic/pgtable-nopud.h:50:24: note: in expansion of macro 'p4d_val'
50 | #define pud_val(x) (p4d_val((x).p4d))
| ^~~~~~~
>> include/asm-generic/pgtable-nopmd.h:49:24: note: in expansion of macro 'pud_val'
49 | #define pmd_val(x) (pud_val((x).pud))
| ^~~~~~~
>> arch/nds32/include/asm/pgtable.h:193:60: note: in expansion of macro 'pmd_val'
193 | #define pmd_page_kernel(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
| ^~~~~~~
>> arch/nds32/include/asm/pgtable.h:190:56: note: in expansion of macro 'pmd_page_kernel'
190 | #define pte_offset_kernel(dir, address) ((pte_t *)pmd_page_kernel(*(dir)) + pte_index(address))
| ^~~~~~~~~~~~~~~
arch/nds32/mm/highmem.c:72:10: note: in expansion of macro 'pte_offset_kernel'
72 | ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
| ^~~~~~~~~~~~~~~~~
>> arch/nds32/include/asm/pgtable.h:362:33: note: in expansion of macro 'pgd_offset'
362 | #define pgd_offset_k(addr) pgd_offset(&init_mm, addr)
| ^~~~~~~~~~
>> arch/nds32/include/asm/pgtable.h:198:39: note: in expansion of macro 'pgd_offset_k'
198 | #define pmd_off_k(address) pmd_offset(pgd_offset_k(address), address)
| ^~~~~~~~~~~~
arch/nds32/mm/highmem.c:72:28: note: in expansion of macro 'pmd_off_k'
72 | ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
| ^~~~~~~~~
In file included from arch/nds32/include/asm/pgtable.h:7,
from include/linux/mm.h:99,
from include/linux/highmem.h:8,
from arch/nds32/mm/highmem.c:5:
include/asm-generic/pgtable-nopmd.h:44:42: note: expected 'pud_t *' {aka 'struct <anonymous> *'} but argument is of type 'pgd_t *' {aka 'long unsigned int *'}
44 | static inline pmd_t * pmd_offset(pud_t * pud, unsigned long address)
| ~~~~~~~~^~~
cc1: some warnings being treated as errors

vim +/pmd_offset +360 arch/nds32/include/asm/pgtable.h

2e1aecb970b766 Greentime Hu 2017-10-24 188
2e1aecb970b766 Greentime Hu 2017-10-24 189 #define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
2e1aecb970b766 Greentime Hu 2017-10-24 @190 #define pte_offset_kernel(dir, address) ((pte_t *)pmd_page_kernel(*(dir)) + pte_index(address))
2e1aecb970b766 Greentime Hu 2017-10-24 191 #define pte_offset_map(dir, address) ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))
2e1aecb970b766 Greentime Hu 2017-10-24 192 #define pte_offset_map_nested(dir, address) pte_offset_map(dir, address)
2e1aecb970b766 Greentime Hu 2017-10-24 @193 #define pmd_page_kernel(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
2e1aecb970b766 Greentime Hu 2017-10-24 194
2e1aecb970b766 Greentime Hu 2017-10-24 195 #define pte_unmap(pte) do { } while (0)
2e1aecb970b766 Greentime Hu 2017-10-24 196 #define pte_unmap_nested(pte) do { } while (0)
2e1aecb970b766 Greentime Hu 2017-10-24 197
2e1aecb970b766 Greentime Hu 2017-10-24 @198 #define pmd_off_k(address) pmd_offset(pgd_offset_k(address), address)
2e1aecb970b766 Greentime Hu 2017-10-24 199
2e1aecb970b766 Greentime Hu 2017-10-24 200 #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
2e1aecb970b766 Greentime Hu 2017-10-24 201 /*
2e1aecb970b766 Greentime Hu 2017-10-24 202 * Set a level 1 translation table entry, and clean it out of
2e1aecb970b766 Greentime Hu 2017-10-24 203 * any caches such that the MMUs can load it correctly.
2e1aecb970b766 Greentime Hu 2017-10-24 204 */
2e1aecb970b766 Greentime Hu 2017-10-24 205 static inline void set_pmd(pmd_t * pmdp, pmd_t pmd)
2e1aecb970b766 Greentime Hu 2017-10-24 206 {
2e1aecb970b766 Greentime Hu 2017-10-24 207
2e1aecb970b766 Greentime Hu 2017-10-24 208 *pmdp = pmd;
2e1aecb970b766 Greentime Hu 2017-10-24 209 #if !defined(CONFIG_CPU_DCACHE_DISABLE) && !defined(CONFIG_CPU_DCACHE_WRITETHROUGH)
2e1aecb970b766 Greentime Hu 2017-10-24 210 __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (pmdp):"memory");
2e1aecb970b766 Greentime Hu 2017-10-24 211 __nds32__msync_all();
2e1aecb970b766 Greentime Hu 2017-10-24 212 __nds32__dsb();
2e1aecb970b766 Greentime Hu 2017-10-24 213 #endif
2e1aecb970b766 Greentime Hu 2017-10-24 214 }
2e1aecb970b766 Greentime Hu 2017-10-24 215
2e1aecb970b766 Greentime Hu 2017-10-24 216 /*
2e1aecb970b766 Greentime Hu 2017-10-24 217 * Set a PTE and flush it out
2e1aecb970b766 Greentime Hu 2017-10-24 218 */
2e1aecb970b766 Greentime Hu 2017-10-24 219 static inline void set_pte(pte_t * ptep, pte_t pte)
2e1aecb970b766 Greentime Hu 2017-10-24 220 {
2e1aecb970b766 Greentime Hu 2017-10-24 221
2e1aecb970b766 Greentime Hu 2017-10-24 222 *ptep = pte;
2e1aecb970b766 Greentime Hu 2017-10-24 223 #if !defined(CONFIG_CPU_DCACHE_DISABLE) && !defined(CONFIG_CPU_DCACHE_WRITETHROUGH)
2e1aecb970b766 Greentime Hu 2017-10-24 224 __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (ptep):"memory");
2e1aecb970b766 Greentime Hu 2017-10-24 225 __nds32__msync_all();
2e1aecb970b766 Greentime Hu 2017-10-24 226 __nds32__dsb();
2e1aecb970b766 Greentime Hu 2017-10-24 227 #endif
2e1aecb970b766 Greentime Hu 2017-10-24 228 }
2e1aecb970b766 Greentime Hu 2017-10-24 229
2e1aecb970b766 Greentime Hu 2017-10-24 230 /*
2e1aecb970b766 Greentime Hu 2017-10-24 231 * The following only work if pte_present() is true.
2e1aecb970b766 Greentime Hu 2017-10-24 232 * Undefined behaviour if not..
2e1aecb970b766 Greentime Hu 2017-10-24 233 */
2e1aecb970b766 Greentime Hu 2017-10-24 234
2e1aecb970b766 Greentime Hu 2017-10-24 235 /*
2e1aecb970b766 Greentime Hu 2017-10-24 236 * pte_write: this page is writeable for user mode
2e1aecb970b766 Greentime Hu 2017-10-24 237 * pte_read: this page is readable for user mode
2e1aecb970b766 Greentime Hu 2017-10-24 238 * pte_kernel_write: this page is writeable for kernel mode
2e1aecb970b766 Greentime Hu 2017-10-24 239 *
2e1aecb970b766 Greentime Hu 2017-10-24 240 * We don't have pte_kernel_read because kernel always can read.
2e1aecb970b766 Greentime Hu 2017-10-24 241 *
2e1aecb970b766 Greentime Hu 2017-10-24 242 * */
2e1aecb970b766 Greentime Hu 2017-10-24 243
2e1aecb970b766 Greentime Hu 2017-10-24 244 #define pte_present(pte) (pte_val(pte) & _PAGE_V)
2e1aecb970b766 Greentime Hu 2017-10-24 245 #define pte_write(pte) ((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_URW_KRW)
2e1aecb970b766 Greentime Hu 2017-10-24 246 #define pte_read(pte) (((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_UR_KR) || \
2e1aecb970b766 Greentime Hu 2017-10-24 247 ((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_UR_KRW) || \
2e1aecb970b766 Greentime Hu 2017-10-24 248 ((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_URW_KRW))
2e1aecb970b766 Greentime Hu 2017-10-24 249 #define pte_kernel_write(pte) (((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_URW_KRW) || \
2e1aecb970b766 Greentime Hu 2017-10-24 250 ((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_UR_KRW) || \
2e1aecb970b766 Greentime Hu 2017-10-24 251 ((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_KRW) || \
2e1aecb970b766 Greentime Hu 2017-10-24 252 (((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_XKRW) && pte_exec(pte)))
2e1aecb970b766 Greentime Hu 2017-10-24 253 #define pte_exec(pte) (pte_val(pte) & _PAGE_E)
2e1aecb970b766 Greentime Hu 2017-10-24 254 #define pte_dirty(pte) (pte_val(pte) & _PAGE_D)
2e1aecb970b766 Greentime Hu 2017-10-24 255 #define pte_young(pte) (pte_val(pte) & _PAGE_YOUNG)
2e1aecb970b766 Greentime Hu 2017-10-24 256
2e1aecb970b766 Greentime Hu 2017-10-24 257 /*
2e1aecb970b766 Greentime Hu 2017-10-24 258 * The following only works if pte_present() is not true.
2e1aecb970b766 Greentime Hu 2017-10-24 259 */
2e1aecb970b766 Greentime Hu 2017-10-24 260 #define pte_file(pte) (pte_val(pte) & _PAGE_FILE)
2e1aecb970b766 Greentime Hu 2017-10-24 261 #define pte_to_pgoff(x) (pte_val(x) >> 2)
2e1aecb970b766 Greentime Hu 2017-10-24 262 #define pgoff_to_pte(x) __pte(((x) << 2) | _PAGE_FILE)
2e1aecb970b766 Greentime Hu 2017-10-24 263
2e1aecb970b766 Greentime Hu 2017-10-24 264 #define PTE_FILE_MAX_BITS 29
2e1aecb970b766 Greentime Hu 2017-10-24 265
2e1aecb970b766 Greentime Hu 2017-10-24 266 #define PTE_BIT_FUNC(fn,op) \
2e1aecb970b766 Greentime Hu 2017-10-24 267 static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; }
2e1aecb970b766 Greentime Hu 2017-10-24 268
2e1aecb970b766 Greentime Hu 2017-10-24 269 static inline pte_t pte_wrprotect(pte_t pte)
2e1aecb970b766 Greentime Hu 2017-10-24 270 {
2e1aecb970b766 Greentime Hu 2017-10-24 271 pte_val(pte) = pte_val(pte) & ~_PAGE_M_MASK;
2e1aecb970b766 Greentime Hu 2017-10-24 272 pte_val(pte) = pte_val(pte) | _PAGE_M_UR_KR;
2e1aecb970b766 Greentime Hu 2017-10-24 273 return pte;
2e1aecb970b766 Greentime Hu 2017-10-24 274 }
2e1aecb970b766 Greentime Hu 2017-10-24 275
2e1aecb970b766 Greentime Hu 2017-10-24 276 static inline pte_t pte_mkwrite(pte_t pte)
2e1aecb970b766 Greentime Hu 2017-10-24 277 {
2e1aecb970b766 Greentime Hu 2017-10-24 278 pte_val(pte) = pte_val(pte) & ~_PAGE_M_MASK;
2e1aecb970b766 Greentime Hu 2017-10-24 279 pte_val(pte) = pte_val(pte) | _PAGE_M_URW_KRW;
2e1aecb970b766 Greentime Hu 2017-10-24 280 return pte;
2e1aecb970b766 Greentime Hu 2017-10-24 281 }
2e1aecb970b766 Greentime Hu 2017-10-24 282
2e1aecb970b766 Greentime Hu 2017-10-24 283 PTE_BIT_FUNC(exprotect, &=~_PAGE_E);
2e1aecb970b766 Greentime Hu 2017-10-24 284 PTE_BIT_FUNC(mkexec, |=_PAGE_E);
2e1aecb970b766 Greentime Hu 2017-10-24 285 PTE_BIT_FUNC(mkclean, &=~_PAGE_D);
2e1aecb970b766 Greentime Hu 2017-10-24 286 PTE_BIT_FUNC(mkdirty, |=_PAGE_D);
2e1aecb970b766 Greentime Hu 2017-10-24 287 PTE_BIT_FUNC(mkold, &=~_PAGE_YOUNG);
2e1aecb970b766 Greentime Hu 2017-10-24 288 PTE_BIT_FUNC(mkyoung, |=_PAGE_YOUNG);
2e1aecb970b766 Greentime Hu 2017-10-24 289 static inline int pte_special(pte_t pte)
2e1aecb970b766 Greentime Hu 2017-10-24 290 {
2e1aecb970b766 Greentime Hu 2017-10-24 291 return 0;
2e1aecb970b766 Greentime Hu 2017-10-24 292 }
2e1aecb970b766 Greentime Hu 2017-10-24 293
2e1aecb970b766 Greentime Hu 2017-10-24 294 static inline pte_t pte_mkspecial(pte_t pte)
2e1aecb970b766 Greentime Hu 2017-10-24 295 {
2e1aecb970b766 Greentime Hu 2017-10-24 296 return pte;
2e1aecb970b766 Greentime Hu 2017-10-24 297 }
2e1aecb970b766 Greentime Hu 2017-10-24 298
2e1aecb970b766 Greentime Hu 2017-10-24 299 /*
2e1aecb970b766 Greentime Hu 2017-10-24 300 * Mark the prot value as uncacheable and unbufferable.
2e1aecb970b766 Greentime Hu 2017-10-24 301 */
2e1aecb970b766 Greentime Hu 2017-10-24 302 #define pgprot_noncached(prot) __pgprot((pgprot_val(prot)&~_PAGE_C_MASK) | _PAGE_C_DEV)
2e1aecb970b766 Greentime Hu 2017-10-24 303 #define pgprot_writecombine(prot) __pgprot((pgprot_val(prot)&~_PAGE_C_MASK) | _PAGE_C_DEV_WB)
2e1aecb970b766 Greentime Hu 2017-10-24 304
2e1aecb970b766 Greentime Hu 2017-10-24 305 #define pmd_none(pmd) (pmd_val(pmd)&0x1)
2e1aecb970b766 Greentime Hu 2017-10-24 306 #define pmd_present(pmd) (!pmd_none(pmd))
2e1aecb970b766 Greentime Hu 2017-10-24 307 #define pmd_bad(pmd) pmd_none(pmd)
2e1aecb970b766 Greentime Hu 2017-10-24 308
2e1aecb970b766 Greentime Hu 2017-10-24 309 #define copy_pmd(pmdpd,pmdps) set_pmd((pmdpd), *(pmdps))
2e1aecb970b766 Greentime Hu 2017-10-24 310 #define pmd_clear(pmdp) set_pmd((pmdp), __pmd(1))
2e1aecb970b766 Greentime Hu 2017-10-24 311
2e1aecb970b766 Greentime Hu 2017-10-24 312 static inline pmd_t __mk_pmd(pte_t * ptep, unsigned long prot)
2e1aecb970b766 Greentime Hu 2017-10-24 313 {
2e1aecb970b766 Greentime Hu 2017-10-24 314 unsigned long ptr = (unsigned long)ptep;
2e1aecb970b766 Greentime Hu 2017-10-24 315 pmd_t pmd;
2e1aecb970b766 Greentime Hu 2017-10-24 316
2e1aecb970b766 Greentime Hu 2017-10-24 317 /*
2e1aecb970b766 Greentime Hu 2017-10-24 318 * The pmd must be loaded with the physical
2e1aecb970b766 Greentime Hu 2017-10-24 319 * address of the PTE table
2e1aecb970b766 Greentime Hu 2017-10-24 320 */
2e1aecb970b766 Greentime Hu 2017-10-24 321
2e1aecb970b766 Greentime Hu 2017-10-24 322 pmd_val(pmd) = __virt_to_phys(ptr) | prot;
2e1aecb970b766 Greentime Hu 2017-10-24 323 return pmd;
2e1aecb970b766 Greentime Hu 2017-10-24 324 }
2e1aecb970b766 Greentime Hu 2017-10-24 325
2e1aecb970b766 Greentime Hu 2017-10-24 326 #define pmd_page(pmd) virt_to_page(__va(pmd_val(pmd)))
2e1aecb970b766 Greentime Hu 2017-10-24 327
2e1aecb970b766 Greentime Hu 2017-10-24 328 /*
2e1aecb970b766 Greentime Hu 2017-10-24 329 * Permanent address of a page. We never have highmem, so this is trivial.
2e1aecb970b766 Greentime Hu 2017-10-24 330 */
2e1aecb970b766 Greentime Hu 2017-10-24 331 #define pages_to_mb(x) ((x) >> (20 - PAGE_SHIFT))
2e1aecb970b766 Greentime Hu 2017-10-24 332
2e1aecb970b766 Greentime Hu 2017-10-24 333 /*
2e1aecb970b766 Greentime Hu 2017-10-24 334 * Conversion functions: convert a page and protection to a page entry,
2e1aecb970b766 Greentime Hu 2017-10-24 335 * and a page entry and page directory to the page they refer to.
2e1aecb970b766 Greentime Hu 2017-10-24 336 */
2e1aecb970b766 Greentime Hu 2017-10-24 337 #define mk_pte(page,prot) pfn_pte(page_to_pfn(page),prot)
2e1aecb970b766 Greentime Hu 2017-10-24 338
2e1aecb970b766 Greentime Hu 2017-10-24 339 /*
2e1aecb970b766 Greentime Hu 2017-10-24 340 * The "pgd_xxx()" functions here are trivial for a folded two-level
2e1aecb970b766 Greentime Hu 2017-10-24 341 * setup: the pgd is never bad, and a pmd always exists (as it's folded
2e1aecb970b766 Greentime Hu 2017-10-24 342 * into the pgd entry)
2e1aecb970b766 Greentime Hu 2017-10-24 343 */
2e1aecb970b766 Greentime Hu 2017-10-24 344 #define pgd_none(pgd) (0)
2e1aecb970b766 Greentime Hu 2017-10-24 345 #define pgd_bad(pgd) (0)
2e1aecb970b766 Greentime Hu 2017-10-24 346 #define pgd_present(pgd) (1)
2e1aecb970b766 Greentime Hu 2017-10-24 347 #define pgd_clear(pgdp) do { } while (0)
2e1aecb970b766 Greentime Hu 2017-10-24 348
2e1aecb970b766 Greentime Hu 2017-10-24 349 #define page_pte_prot(page,prot) mk_pte(page, prot)
2e1aecb970b766 Greentime Hu 2017-10-24 350 #define page_pte(page) mk_pte(page, __pgprot(0))
2e1aecb970b766 Greentime Hu 2017-10-24 351 /*
2e1aecb970b766 Greentime Hu 2017-10-24 352 * L1PTE = $mr1 + ((virt >> PMD_SHIFT) << 2);
2e1aecb970b766 Greentime Hu 2017-10-24 353 * L2PTE = (((virt >> PAGE_SHIFT) & (PTRS_PER_PTE -1 )) << 2);
2e1aecb970b766 Greentime Hu 2017-10-24 354 * PPN = (phys & 0xfffff000);
2e1aecb970b766 Greentime Hu 2017-10-24 355 *
2e1aecb970b766 Greentime Hu 2017-10-24 356 */
2e1aecb970b766 Greentime Hu 2017-10-24 357
2e1aecb970b766 Greentime Hu 2017-10-24 358 /* to find an entry in a page-table-directory */
2e1aecb970b766 Greentime Hu 2017-10-24 359 #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
2e1aecb970b766 Greentime Hu 2017-10-24 @360 #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
2e1aecb970b766 Greentime Hu 2017-10-24 361 /* to find an entry in a kernel page-table-directory */
2e1aecb970b766 Greentime Hu 2017-10-24 @362 #define pgd_offset_k(addr) pgd_offset(&init_mm, addr)
2e1aecb970b766 Greentime Hu 2017-10-24 363

:::::: The code at line 360 was first introduced by commit
:::::: 2e1aecb970b7662cf3d53d2d18a54c17f1eb55b8 nds32: MMU definitions

:::::: TO: Greentime Hu <greentime@xxxxxxxxxxxxx>
:::::: CC: Greentime Hu <greentime@xxxxxxxxxxxxx>

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