From a36159eec6ca17402b0e146b86efaf76568dc353 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 20 Sep 2024 01:41:23 +0000
Subject: [PATCH] 重命名 AX88772C_eeprom/asix.c 为 asix_mac.c
---
kernel/arch/riscv/include/asm/pgtable.h | 164 ++++++++++++++++++++++++++++++++++++------------------
1 files changed, 109 insertions(+), 55 deletions(-)
diff --git a/kernel/arch/riscv/include/asm/pgtable.h b/kernel/arch/riscv/include/asm/pgtable.h
index a8179a8..b16304f 100644
--- a/kernel/arch/riscv/include/asm/pgtable.h
+++ b/kernel/arch/riscv/include/asm/pgtable.h
@@ -1,20 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2012 Regents of the University of California
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
*/
#ifndef _ASM_RISCV_PGTABLE_H
#define _ASM_RISCV_PGTABLE_H
#include <linux/mmzone.h>
+#include <linux/sizes.h>
#include <asm/pgtable-bits.h>
@@ -26,12 +19,54 @@
#include <asm/tlbflush.h>
#include <linux/mm_types.h>
+#ifdef CONFIG_MMU
+
+#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 1)
+#define VMALLOC_END (PAGE_OFFSET - 1)
+#define VMALLOC_START (PAGE_OFFSET - VMALLOC_SIZE)
+
+#define BPF_JIT_REGION_SIZE (SZ_128M)
+#define BPF_JIT_REGION_START (PAGE_OFFSET - BPF_JIT_REGION_SIZE)
+#define BPF_JIT_REGION_END (VMALLOC_END)
+
+/*
+ * Roughly size the vmemmap space to be large enough to fit enough
+ * struct pages to map half the virtual address space. Then
+ * position vmemmap directly below the VMALLOC region.
+ */
+#define VMEMMAP_SHIFT \
+ (CONFIG_VA_BITS - PAGE_SHIFT - 1 + STRUCT_PAGE_MAX_SHIFT)
+#define VMEMMAP_SIZE BIT(VMEMMAP_SHIFT)
+#define VMEMMAP_END (VMALLOC_START - 1)
+#define VMEMMAP_START (VMALLOC_START - VMEMMAP_SIZE)
+
+/*
+ * Define vmemmap for pfn_to_page & page_to_pfn calls. Needed if kernel
+ * is configured with CONFIG_SPARSEMEM_VMEMMAP enabled.
+ */
+#define vmemmap ((struct page *)VMEMMAP_START)
+
+#define PCI_IO_SIZE SZ_16M
+#define PCI_IO_END VMEMMAP_START
+#define PCI_IO_START (PCI_IO_END - PCI_IO_SIZE)
+
+#define FIXADDR_TOP PCI_IO_START
+#ifdef CONFIG_64BIT
+#define FIXADDR_SIZE PMD_SIZE
+#else
+#define FIXADDR_SIZE PGDIR_SIZE
+#endif
+#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
+
+#endif
+
#ifdef CONFIG_64BIT
#include <asm/pgtable-64.h>
#else
#include <asm/pgtable-32.h>
#endif /* CONFIG_64BIT */
+#ifdef CONFIG_MMU
/* Number of entries in the page global directory */
#define PTRS_PER_PGD (PAGE_SIZE / sizeof(pgd_t))
/* Number of entries in the page table */
@@ -39,7 +74,6 @@
/* Number of PGD entries that a user-mode program can use */
#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
-#define FIRST_USER_ADDRESS 0
/* Page protection bits */
#define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_USER)
@@ -65,7 +99,18 @@
| _PAGE_DIRTY)
#define PAGE_KERNEL __pgprot(_PAGE_KERNEL)
+#define PAGE_KERNEL_READ __pgprot(_PAGE_KERNEL & ~_PAGE_WRITE)
#define PAGE_KERNEL_EXEC __pgprot(_PAGE_KERNEL | _PAGE_EXEC)
+#define PAGE_KERNEL_READ_EXEC __pgprot((_PAGE_KERNEL & ~_PAGE_WRITE) \
+ | _PAGE_EXEC)
+
+#define PAGE_TABLE __pgprot(_PAGE_TABLE)
+
+/*
+ * The RISC-V ISA doesn't yet specify how to query or modify PMAs, so we can't
+ * change the properties of memory regions.
+ */
+#define _PAGE_IOREMAP _PAGE_KERNEL
extern pgd_t swapper_pg_dir[];
@@ -89,13 +134,6 @@
#define __S110 PAGE_SHARED_EXEC
#define __S111 PAGE_SHARED_EXEC
-/*
- * ZERO_PAGE is a global shared page that is always zero,
- * used for zero-mapped memory areas, etc.
- */
-extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
-#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
-
static inline int pmd_present(pmd_t pmd)
{
return (pmd_val(pmd) & (_PAGE_PRESENT | _PAGE_PROT_NONE));
@@ -111,6 +149,13 @@
return !pmd_present(pmd);
}
+#define pmd_leaf pmd_leaf
+static inline int pmd_leaf(pmd_t pmd)
+{
+ return pmd_present(pmd) &&
+ (pmd_val(pmd) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC));
+}
+
static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
{
*pmdp = pmd;
@@ -121,21 +166,15 @@
set_pmd(pmdp, __pmd(0));
}
-
static inline pgd_t pfn_pgd(unsigned long pfn, pgprot_t prot)
{
return __pgd((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot));
}
-#define pgd_index(addr) (((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
-
-/* Locate an entry in the page global directory */
-static inline pgd_t *pgd_offset(const struct mm_struct *mm, unsigned long addr)
+static inline unsigned long _pgd_pfn(pgd_t pgd)
{
- return mm->pgd + pgd_index(addr);
+ return pgd_val(pgd) >> _PAGE_PFN_SHIFT;
}
-/* Locate an entry in the kernel page global directory */
-#define pgd_offset_k(addr) pgd_offset(&init_mm, (addr))
static inline struct page *pmd_page(pmd_t pmd)
{
@@ -161,20 +200,7 @@
return __pte((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot));
}
-static inline pte_t mk_pte(struct page *page, pgprot_t prot)
-{
- return pfn_pte(page_to_pfn(page), prot);
-}
-
-#define pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
-
-static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long addr)
-{
- return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(addr);
-}
-
-#define pte_offset_map(dir, addr) pte_offset_kernel((dir), (addr))
-#define pte_unmap(pte) ((void)(pte))
+#define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot)
static inline int pte_present(pte_t pte)
{
@@ -256,6 +282,11 @@
static inline pte_t pte_mkspecial(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_SPECIAL);
+}
+
+static inline pte_t pte_mkhuge(pte_t pte)
+{
+ return pte;
}
/* Modify page protection bits */
@@ -400,32 +431,55 @@
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#ifdef CONFIG_FLATMEM
-#define kern_addr_valid(addr) (1) /* FIXME */
+/*
+ * In the RV64 Linux scheme, we give the user half of the virtual-address space
+ * and give the kernel the other (upper) half.
+ */
+#ifdef CONFIG_64BIT
+#define KERN_VIRT_START (-(BIT(CONFIG_VA_BITS)) + TASK_SIZE)
+#else
+#define KERN_VIRT_START FIXADDR_START
#endif
-extern void paging_init(void);
-
-static inline void pgtable_cache_init(void)
-{
- /* No page table caches to initialize */
-}
-
-#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 1)
-#define VMALLOC_END (PAGE_OFFSET - 1)
-#define VMALLOC_START (PAGE_OFFSET - VMALLOC_SIZE)
-
/*
- * Task size is 0x40000000000 for RV64 or 0xb800000 for RV32.
+ * Task size is 0x4000000000 for RV64 or 0x9fc00000 for RV32.
* Note that PGDIR_SIZE must evenly divide TASK_SIZE.
*/
#ifdef CONFIG_64BIT
#define TASK_SIZE (PGDIR_SIZE * PTRS_PER_PGD / 2)
#else
-#define TASK_SIZE VMALLOC_START
+#define TASK_SIZE FIXADDR_START
#endif
-#include <asm-generic/pgtable.h>
+#else /* CONFIG_MMU */
+
+#define PAGE_SHARED __pgprot(0)
+#define PAGE_KERNEL __pgprot(0)
+#define swapper_pg_dir NULL
+#define TASK_SIZE 0xffffffffUL
+#define VMALLOC_START 0
+#define VMALLOC_END TASK_SIZE
+
+static inline void __kernel_map_pages(struct page *page, int numpages, int enable) {}
+
+#endif /* !CONFIG_MMU */
+
+#define kern_addr_valid(addr) (1) /* FIXME */
+
+extern void *dtb_early_va;
+extern uintptr_t dtb_early_pa;
+void setup_bootmem(void);
+void paging_init(void);
+void misc_mem_init(void);
+
+#define FIRST_USER_ADDRESS 0
+
+/*
+ * ZERO_PAGE is a global shared page that is always zero,
+ * used for zero-mapped memory areas, etc.
+ */
+extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
+#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
#endif /* !__ASSEMBLY__ */
--
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