arch/riscv/include/asm/pgtable-64.h
Source file repositories/reference/linux-study-clean/arch/riscv/include/asm/pgtable-64.h
File Facts
- System
- Linux kernel
- Corpus path
arch/riscv/include/asm/pgtable-64.h- Extension
.h- Size
- 9738 bytes
- Lines
- 407
- Domain
- Architecture Layer
- Bucket
- arch/riscv
- 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/bits.hlinux/const.hasm/errata_list.h
Detected Declarations
enum napot_cont_orderfunction riscv_page_mtmaskfunction riscv_page_nocachefunction riscv_page_iofunction pud_presentfunction pud_nonefunction pud_badfunction pud_leaffunction pud_userfunction set_pudfunction pud_clearfunction pfn_pudfunction _pud_pfnfunction mm_p4d_foldedfunction mm_pud_foldedfunction pfn_pmdfunction _pmd_pfnfunction set_p4dfunction set_pudfunction p4d_nonefunction p4d_presentfunction p4d_badfunction p4d_clearfunction pfn_p4dfunction _p4d_pfnfunction set_pgdfunction set_p4dfunction pgd_nonefunction pgd_presentfunction pgd_badfunction pgd_clear
Annotated Snippet
set_pud((pud_t *)p4dp, (pud_t){ p4d_val(p4d) });
}
static inline int p4d_none(p4d_t p4d)
{
if (pgtable_l4_enabled)
return (p4d_val(p4d) == 0);
return 0;
}
static inline int p4d_present(p4d_t p4d)
{
if (pgtable_l4_enabled)
return (p4d_val(p4d) & _PAGE_PRESENT);
return 1;
}
static inline int p4d_bad(p4d_t p4d)
{
if (pgtable_l4_enabled)
return !p4d_present(p4d);
return 0;
}
static inline void p4d_clear(p4d_t *p4d)
{
if (pgtable_l4_enabled)
set_p4d(p4d, __p4d(0));
}
static inline p4d_t pfn_p4d(unsigned long pfn, pgprot_t prot)
{
return __p4d((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot));
}
static inline unsigned long _p4d_pfn(p4d_t p4d)
{
return __page_val_to_pfn(p4d_val(p4d));
}
static inline pud_t *p4d_pgtable(p4d_t p4d)
{
if (pgtable_l4_enabled)
return (pud_t *)pfn_to_virt(__page_val_to_pfn(p4d_val(p4d)));
return (pud_t *)pud_pgtable((pud_t) { p4d_val(p4d) });
}
#define p4d_page_vaddr(p4d) ((unsigned long)p4d_pgtable(p4d))
static inline struct page *p4d_page(p4d_t p4d)
{
return pfn_to_page(__page_val_to_pfn(p4d_val(p4d)));
}
#define pud_index(addr) (((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))
#define pud_offset pud_offset
pud_t *pud_offset(p4d_t *p4d, unsigned long address);
static inline void set_pgd(pgd_t *pgdp, pgd_t pgd)
{
if (pgtable_l5_enabled)
WRITE_ONCE(*pgdp, pgd);
else
set_p4d((p4d_t *)pgdp, (p4d_t){ pgd_val(pgd) });
}
static inline int pgd_none(pgd_t pgd)
{
if (pgtable_l5_enabled)
return (pgd_val(pgd) == 0);
return 0;
}
static inline int pgd_present(pgd_t pgd)
{
if (pgtable_l5_enabled)
return (pgd_val(pgd) & _PAGE_PRESENT);
return 1;
}
static inline int pgd_bad(pgd_t pgd)
{
if (pgtable_l5_enabled)
return !pgd_present(pgd);
Annotation
- Immediate include surface: `linux/bits.h`, `linux/const.h`, `asm/errata_list.h`.
- Detected declarations: `enum napot_cont_order`, `function riscv_page_mtmask`, `function riscv_page_nocache`, `function riscv_page_io`, `function pud_present`, `function pud_none`, `function pud_bad`, `function pud_leaf`, `function pud_user`, `function set_pud`.
- Atlas domain: Architecture Layer / arch/riscv.
- 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.