arch/csky/include/asm/pgalloc.h
Source file repositories/reference/linux-study-clean/arch/csky/include/asm/pgalloc.h
File Facts
- System
- Linux kernel
- Corpus path
arch/csky/include/asm/pgalloc.h- Extension
.h- Size
- 1568 bytes
- Lines
- 72
- Domain
- Architecture Layer
- Bucket
- arch/csky
- Inferred role
- Architecture Layer: implementation source
- Status
- source implementation candidate
Why This File Exists
CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/highmem.hlinux/mm.hlinux/sched.hasm-generic/pgalloc.h
Detected Declarations
function pmd_populate_kernelfunction pmd_populate
Annotated Snippet
#ifndef __ASM_CSKY_PGALLOC_H
#define __ASM_CSKY_PGALLOC_H
#include <linux/highmem.h>
#include <linux/mm.h>
#include <linux/sched.h>
#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
#include <asm-generic/pgalloc.h>
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
pte_t *pte)
{
set_pmd(pmd, __pmd(__pa(pte)));
}
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
pgtable_t pte)
{
set_pmd(pmd, __pmd(__pa(page_address(pte))));
}
extern void pgd_init(unsigned long *p);
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
{
pte_t *pte;
unsigned long i;
pte = __pte_alloc_one_kernel(mm);
if (!pte)
return NULL;
for (i = 0; i < PAGE_SIZE/sizeof(pte_t); i++)
(pte + i)->pte_low = _PAGE_GLOBAL;
return pte;
}
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
pgd_t *ret;
pgd_t *init;
ret = __pgd_alloc(mm, 0);
if (ret) {
init = pgd_offset(&init_mm, 0UL);
pgd_init((unsigned long *)ret);
memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
/* prevent out of order excute */
smp_mb();
#ifdef CONFIG_CPU_NEED_TLBSYNC
dcache_wb_range((unsigned int)ret,
(unsigned int)(ret + PTRS_PER_PGD));
#endif
}
return ret;
}
#define __pte_free_tlb(tlb, pte, address) \
tlb_remove_ptdesc((tlb), page_ptdesc(pte))
extern void pagetable_init(void);
extern void mmu_init(unsigned long min_pfn, unsigned long max_pfn);
extern void pre_trap_init(void);
#endif /* __ASM_CSKY_PGALLOC_H */
Annotation
- Immediate include surface: `linux/highmem.h`, `linux/mm.h`, `linux/sched.h`, `asm-generic/pgalloc.h`.
- Detected declarations: `function pmd_populate_kernel`, `function pmd_populate`.
- Atlas domain: Architecture Layer / arch/csky.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.