#include <linux/compiler.h>
#include <linux/const.h>
#include <linux/types.h>
+#include <asm/bug.h>
#include <asm/sizes.h>
/*
*/
#define PCI_IO_SIZE SZ_16M
+/*
+ * Log2 of the upper bound of the size of a struct page. Used for sizing
+ * the vmemmap region only, does not affect actual memory footprint.
+ * We don't use sizeof(struct page) directly since taking its size here
+ * requires its definition to be available at this point in the inclusion
+ * chain, and it may not be a power of 2 in the first place.
+ */
+#define STRUCT_PAGE_MAX_SHIFT 6
+
+/*
+ * VMEMMAP_SIZE - allows the whole linear region to be covered by
+ * a struct page array
+ */
+#define VMEMMAP_SIZE (UL(1) << (VA_BITS - PAGE_SHIFT - 1 + STRUCT_PAGE_MAX_SHIFT))
+
/*
* PAGE_OFFSET - the virtual address of the start of the kernel image (top
* (VA_BITS - 1))
* VA_START - the first kernel virtual address.
* TASK_SIZE - the maximum size of a user space task.
* TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area.
- * The module space lives between the addresses given by TASK_SIZE
- * and PAGE_OFFSET - it must be within 128MB of the kernel text.
*/
#define VA_BITS (CONFIG_ARM64_VA_BITS)
#define VA_START (UL(0xffffffffffffffff) << VA_BITS)
#define PAGE_OFFSET (UL(0xffffffffffffffff) << (VA_BITS - 1))
-#define MODULES_END (PAGE_OFFSET)
-#define MODULES_VADDR (MODULES_END - SZ_64M)
-#define PCI_IO_END (MODULES_VADDR - SZ_2M)
+#define KIMAGE_VADDR (MODULES_END)
+#define MODULES_END (MODULES_VADDR + MODULES_VSIZE)
+#define MODULES_VADDR (VA_START + KASAN_SHADOW_SIZE)
+#define MODULES_VSIZE (SZ_128M)
+#define VMEMMAP_START (PAGE_OFFSET - VMEMMAP_SIZE)
+#define PCI_IO_END (VMEMMAP_START - SZ_2M)
#define PCI_IO_START (PCI_IO_END - PCI_IO_SIZE)
#define FIXADDR_TOP (PCI_IO_START - SZ_2M)
#define TASK_SIZE_64 (UL(1) << VA_BITS)
#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 4))
+/*
+ * The size of the KASAN shadow region. This should be 1/8th of the
+ * size of the entire kernel virtual address space.
+ */
+#ifdef CONFIG_KASAN
+#define KASAN_SHADOW_SIZE (UL(1) << (VA_BITS - 3))
+#else
+#define KASAN_SHADOW_SIZE (0)
+#endif
+
/*
* Physical vs virtual RAM address space conversion. These are
* private definitions which should NOT be used outside memory.h
* files. Use virt_to_phys/phys_to_virt/__pa/__va instead.
*/
-#define __virt_to_phys(x) (((phys_addr_t)(x) - PAGE_OFFSET + PHYS_OFFSET))
-#define __phys_to_virt(x) ((unsigned long)((x) - PHYS_OFFSET + PAGE_OFFSET))
+#define __virt_to_phys(x) ({ \
+ phys_addr_t __x = (phys_addr_t)(x); \
+ __x & BIT(VA_BITS - 1) ? (__x & ~PAGE_OFFSET) + PHYS_OFFSET : \
+ (__x - kimage_voffset); })
+
+#define __phys_to_virt(x) ((unsigned long)((x) - PHYS_OFFSET) | PAGE_OFFSET)
+#define __phys_to_kimg(x) ((unsigned long)((x) + kimage_voffset))
/*
* Convert a page to/from a physical address
#define MT_S2_NORMAL 0xf
#define MT_S2_DEVICE_nGnRE 0x1
+#ifdef CONFIG_ARM64_4K_PAGES
+#define IOREMAP_MAX_ORDER (PUD_SHIFT)
+#else
+#define IOREMAP_MAX_ORDER (PMD_SHIFT)
+#endif
+
+#ifdef CONFIG_BLK_DEV_INITRD
+#define __early_init_dt_declare_initrd(__start, __end) \
+ do { \
+ initrd_start = (__start); \
+ initrd_end = (__end); \
+ } while (0)
+#endif
+
#ifndef __ASSEMBLY__
-extern phys_addr_t memstart_addr;
+#include <linux/bitops.h>
+#include <linux/mmdebug.h>
+
+extern s64 memstart_addr;
/* PHYS_OFFSET - the physical address of the start of memory. */
-#define PHYS_OFFSET ({ memstart_addr; })
+#define PHYS_OFFSET ({ VM_BUG_ON(memstart_addr & 1); memstart_addr; })
+
+/* the virtual base of the kernel image (minus TEXT_OFFSET) */
+extern u64 kimage_vaddr;
+
+/* the offset between the kernel virtual and physical mappings */
+extern u64 kimage_voffset;
/*
- * The maximum physical address that the linear direct mapping
- * of system RAM can cover. (PAGE_OFFSET can be interpreted as
- * a 2's complement signed quantity and negated to derive the
- * maximum size of the linear mapping.)
+ * Allow all memory at the discovery stage. We will clip it later.
*/
-#define MAX_MEMBLOCK_ADDR ({ memstart_addr - PAGE_OFFSET - 1; })
+#define MIN_MEMBLOCK_ADDR 0
+#define MAX_MEMBLOCK_ADDR U64_MAX
/*
* PFNs are used to describe any physical page; this means
*/
#define ARCH_PFN_OFFSET ((unsigned long)PHYS_PFN_OFFSET)
+#ifndef CONFIG_SPARSEMEM_VMEMMAP
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
-#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+#else
+#define __virt_to_pgoff(kaddr) (((u64)(kaddr) & ~PAGE_OFFSET) / PAGE_SIZE * sizeof(struct page))
+#define __page_to_voff(kaddr) (((u64)(page) & ~VMEMMAP_START) * PAGE_SIZE / sizeof(struct page))
+#define page_to_virt(page) ((void *)((__page_to_voff(page)) | PAGE_OFFSET))
+#define virt_to_page(vaddr) ((struct page *)((__virt_to_pgoff(vaddr)) | VMEMMAP_START))
+
+#define virt_addr_valid(kaddr) pfn_valid((((u64)(kaddr) & ~PAGE_OFFSET) \
+ + PHYS_OFFSET) >> PAGE_SHIFT)
+#endif
#endif
#include <asm-generic/memory_model.h>
projects / cascardo / linux.git / blobdiff