From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM
---
kernel/arch/parisc/include/asm/pgalloc.h | 133 ++++++++------------------------------------
1 files changed, 25 insertions(+), 108 deletions(-)
diff --git a/kernel/arch/parisc/include/asm/pgalloc.h b/kernel/arch/parisc/include/asm/pgalloc.h
index cf13275..dda5570 100644
--- a/kernel/arch/parisc/include/asm/pgalloc.h
+++ b/kernel/arch/parisc/include/asm/pgalloc.h
@@ -10,148 +10,65 @@
#include <asm/cache.h>
-/* Allocate the top level pgd (page directory)
- *
- * Here (for 64 bit kernels) we implement a Hybrid L2/L3 scheme: we
- * allocate the first pmd adjacent to the pgd. This means that we can
- * subtract a constant offset to get to it. The pmd and pgd sizes are
- * arranged so that a single pmd covers 4GB (giving a full 64-bit
- * process access to 8TB) so our lookups are effectively L2 for the
- * first 4GB of the kernel (i.e. for all ILP32 processes and all the
- * kernel for machines with under 4GB of memory) */
+#define __HAVE_ARCH_PMD_ALLOC_ONE
+#define __HAVE_ARCH_PMD_FREE
+#define __HAVE_ARCH_PGD_FREE
+#include <asm-generic/pgalloc.h>
+
+/* Allocate the top level pgd (page directory) */
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
- pgd_t *pgd = (pgd_t *)__get_free_pages(GFP_KERNEL,
- PGD_ALLOC_ORDER);
- pgd_t *actual_pgd = pgd;
+ pgd_t *pgd;
- if (likely(pgd != NULL)) {
- memset(pgd, 0, PAGE_SIZE<<PGD_ALLOC_ORDER);
-#if CONFIG_PGTABLE_LEVELS == 3
- actual_pgd += PTRS_PER_PGD;
- /* Populate first pmd with allocated memory. We mark it
- * with PxD_FLAG_ATTACHED as a signal to the system that this
- * pmd entry may not be cleared. */
- __pgd_val_set(*actual_pgd, (PxD_FLAG_PRESENT |
- PxD_FLAG_VALID |
- PxD_FLAG_ATTACHED)
- + (__u32)(__pa((unsigned long)pgd) >> PxD_VALUE_SHIFT));
- /* The first pmd entry also is marked with PxD_FLAG_ATTACHED as
- * a signal that this pmd may not be freed */
- __pgd_val_set(*pgd, PxD_FLAG_ATTACHED);
-#endif
- }
- return actual_pgd;
+ pgd = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
+ if (unlikely(pgd == NULL))
+ return NULL;
+
+ memset(pgd, 0, PAGE_SIZE << PGD_ORDER);
+
+ return pgd;
}
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
-#if CONFIG_PGTABLE_LEVELS == 3
- pgd -= PTRS_PER_PGD;
-#endif
- free_pages((unsigned long)pgd, PGD_ALLOC_ORDER);
+ free_pages((unsigned long)pgd, PGD_ORDER);
}
#if CONFIG_PGTABLE_LEVELS == 3
/* Three Level Page Table Support for pmd's */
-static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
+static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
{
- __pgd_val_set(*pgd, (PxD_FLAG_PRESENT | PxD_FLAG_VALID) +
- (__u32)(__pa((unsigned long)pmd) >> PxD_VALUE_SHIFT));
+ set_pud(pud, __pud((PxD_FLAG_PRESENT | PxD_FLAG_VALID) +
+ (__u32)(__pa((unsigned long)pmd) >> PxD_VALUE_SHIFT)));
}
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
{
- pmd_t *pmd = (pmd_t *)__get_free_pages(GFP_KERNEL, PMD_ORDER);
- if (pmd)
- memset(pmd, 0, PAGE_SIZE<<PMD_ORDER);
+ pmd_t *pmd;
+
+ pmd = (pmd_t *)__get_free_pages(GFP_PGTABLE_KERNEL, PMD_ORDER);
+ if (likely(pmd))
+ memset ((void *)pmd, 0, PAGE_SIZE << PMD_ORDER);
return pmd;
}
static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
{
- if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED) {
- /*
- * This is the permanent pmd attached to the pgd;
- * cannot free it.
- * Increment the counter to compensate for the decrement
- * done by generic mm code.
- */
- mm_inc_nr_pmds(mm);
- return;
- }
free_pages((unsigned long)pmd, PMD_ORDER);
}
-
-#else
-
-/* Two Level Page Table Support for pmd's */
-
-/*
- * allocating and freeing a pmd is trivial: the 1-entry pmd is
- * inside the pgd, so has no extra memory associated with it.
- */
-
-#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
-#define pmd_free(mm, x) do { } while (0)
-#define pgd_populate(mm, pmd, pte) BUG()
-
#endif
static inline void
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
{
-#if CONFIG_PGTABLE_LEVELS == 3
- /* preserve the gateway marker if this is the beginning of
- * the permanent pmd */
- if(pmd_flag(*pmd) & PxD_FLAG_ATTACHED)
- __pmd_val_set(*pmd, (PxD_FLAG_PRESENT |
- PxD_FLAG_VALID |
- PxD_FLAG_ATTACHED)
- + (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT));
- else
-#endif
- __pmd_val_set(*pmd, (PxD_FLAG_PRESENT | PxD_FLAG_VALID)
- + (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT));
+ set_pmd(pmd, __pmd((PxD_FLAG_PRESENT | PxD_FLAG_VALID)
+ + (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT)));
}
#define pmd_populate(mm, pmd, pte_page) \
pmd_populate_kernel(mm, pmd, page_address(pte_page))
#define pmd_pgtable(pmd) pmd_page(pmd)
-
-static inline pgtable_t
-pte_alloc_one(struct mm_struct *mm, unsigned long address)
-{
- struct page *page = alloc_page(GFP_KERNEL|__GFP_ZERO);
- if (!page)
- return NULL;
- if (!pgtable_page_ctor(page)) {
- __free_page(page);
- return NULL;
- }
- return page;
-}
-
-static inline pte_t *
-pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr)
-{
- pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
- return pte;
-}
-
-static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
-{
- free_page((unsigned long)pte);
-}
-
-static inline void pte_free(struct mm_struct *mm, struct page *pte)
-{
- pgtable_page_dtor(pte);
- pte_free_kernel(mm, page_address(pte));
-}
-
-#define check_pgt_cache() do { } while (0)
#endif
--
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