mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-30 22:03:17 +01:00
Mike Rapoport
e31cf2f4ca
Patch series "mm: consolidate definitions of page table accessors", v2.
The low level page table accessors (pXY_index(), pXY_offset()) are
duplicated across all architectures and sometimes more than once. For
instance, we have 31 definition of pgd_offset() for 25 supported
architectures.
Most of these definitions are actually identical and typically it boils
down to, e.g.
static inline unsigned long pmd_index(unsigned long address)
{
return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
}
static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
{
return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
}
These definitions can be shared among 90% of the arches provided
XYZ_SHIFT, PTRS_PER_XYZ and xyz_page_vaddr() are defined.
For architectures that really need a custom version there is always
possibility to override the generic version with the usual ifdefs magic.
These patches introduce include/linux/pgtable.h that replaces
include/asm-generic/pgtable.h and add the definitions of the page table
accessors to the new header.
This patch (of 12):
The linux/mm.h header includes <asm/pgtable.h> to allow inlining of the
functions involving page table manipulations, e.g. pte_alloc() and
pmd_alloc(). So, there is no point to explicitly include <asm/pgtable.h>
in the files that include <linux/mm.h>.
The include statements in such cases are remove with a simple loop:
for f in $(git grep -l "include <linux/mm.h>") ; do
sed -i -e '/include <asm\/pgtable.h>/ d' $f
done
Signed-off-by: Mike Rapoport <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Cain <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Chris Zankel <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Greentime Hu <[email protected]>
Cc: Greg Ungerer <[email protected]>
Cc: Guan Xuetao <[email protected]>
Cc: Guo Ren <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Ley Foon Tan <[email protected]>
Cc: Mark Salter <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Matt Turner <[email protected]>
Cc: Max Filippov <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Nick Hu <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Richard Weinberger <[email protected]>
Cc: Rich Felker <[email protected]>
Cc: Russell King <[email protected]>
Cc: Stafford Horne <[email protected]>
Cc: Thomas Bogendoerfer <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Vincent Chen <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
|
|
|
|
#include <linux/moduleloader.h>
|
|
#include <linux/elf.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#ifdef CONFIG_CPU_CK810
|
|
#define IS_BSR32(hi16, lo16) (((hi16) & 0xFC00) == 0xE000)
|
|
#define IS_JSRI32(hi16, lo16) ((hi16) == 0xEAE0)
|
|
|
|
#define CHANGE_JSRI_TO_LRW(addr) do { \
|
|
*(uint16_t *)(addr) = (*(uint16_t *)(addr) & 0xFF9F) | 0x001a; \
|
|
*((uint16_t *)(addr) + 1) = *((uint16_t *)(addr) + 1) & 0xFFFF; \
|
|
} while (0)
|
|
|
|
#define SET_JSR32_R26(addr) do { \
|
|
*(uint16_t *)(addr) = 0xE8Fa; \
|
|
*((uint16_t *)(addr) + 1) = 0x0000; \
|
|
} while (0)
|
|
|
|
static void jsri_2_lrw_jsr(uint32_t *location)
|
|
{
|
|
uint16_t *location_tmp = (uint16_t *)location;
|
|
|
|
if (IS_BSR32(*location_tmp, *(location_tmp + 1)))
|
|
return;
|
|
|
|
if (IS_JSRI32(*location_tmp, *(location_tmp + 1))) {
|
|
/* jsri 0x... --> lrw r26, 0x... */
|
|
CHANGE_JSRI_TO_LRW(location);
|
|
/* lsli r0, r0 --> jsr r26 */
|
|
SET_JSR32_R26(location + 1);
|
|
}
|
|
}
|
|
#else
|
|
static void inline jsri_2_lrw_jsr(uint32_t *location)
|
|
{
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
|
|
unsigned int symindex, unsigned int relsec, struct module *me)
|
|
{
|
|
unsigned int i;
|
|
Elf32_Rela *rel = (void *) sechdrs[relsec].sh_addr;
|
|
Elf32_Sym *sym;
|
|
uint32_t *location;
|
|
short *temp;
|
|
|
|
for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
|
|
/* This is where to make the change */
|
|
location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
|
|
+ rel[i].r_offset;
|
|
sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
|
|
+ ELF32_R_SYM(rel[i].r_info);
|
|
|
|
switch (ELF32_R_TYPE(rel[i].r_info)) {
|
|
case R_CSKY_32:
|
|
/* We add the value into the location given */
|
|
*location = rel[i].r_addend + sym->st_value;
|
|
break;
|
|
case R_CSKY_PC32:
|
|
/* Add the value, subtract its postition */
|
|
*location = rel[i].r_addend + sym->st_value
|
|
- (uint32_t)location;
|
|
break;
|
|
case R_CSKY_PCRELJSR_IMM11BY2:
|
|
break;
|
|
case R_CSKY_PCRELJSR_IMM26BY2:
|
|
jsri_2_lrw_jsr(location);
|
|
break;
|
|
case R_CSKY_ADDR_HI16:
|
|
temp = ((short *)location) + 1;
|
|
*temp = (short)
|
|
((rel[i].r_addend + sym->st_value) >> 16);
|
|
break;
|
|
case R_CSKY_ADDR_LO16:
|
|
temp = ((short *)location) + 1;
|
|
*temp = (short)
|
|
((rel[i].r_addend + sym->st_value) & 0xffff);
|
|
break;
|
|
default:
|
|
pr_err("module %s: Unknown relocation: %u\n",
|
|
me->name, ELF32_R_TYPE(rel[i].r_info));
|
|
return -ENOEXEC;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|