cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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page.h (2757B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2
      3#ifndef __ASM_CSKY_PAGE_H
      4#define __ASM_CSKY_PAGE_H
      5
      6#include <asm/setup.h>
      7#include <asm/cache.h>
      8#include <linux/const.h>
      9
     10/*
     11 * PAGE_SHIFT determines the page size: 4KB
     12 */
     13#define PAGE_SHIFT	12
     14#define PAGE_SIZE	(_AC(1, UL) << PAGE_SHIFT)
     15#define PAGE_MASK	(~(PAGE_SIZE - 1))
     16#define THREAD_SIZE	(PAGE_SIZE * 2)
     17#define THREAD_MASK	(~(THREAD_SIZE - 1))
     18#define THREAD_SHIFT	(PAGE_SHIFT + 1)
     19
     20
     21/*
     22 * For C-SKY "User-space:Kernel-space" is "2GB:2GB" fixed by hardware and there
     23 * are two segment registers (MSA0 + MSA1) to mapping 512MB + 512MB physical
     24 * address region. We use them mapping kernel 1GB direct-map address area and
     25 * for more than 1GB of memory we use highmem.
     26 */
     27#define PAGE_OFFSET	CONFIG_PAGE_OFFSET
     28#define SSEG_SIZE	0x20000000
     29#define LOWMEM_LIMIT	(SSEG_SIZE * 2)
     30
     31#define PHYS_OFFSET_OFFSET (CONFIG_DRAM_BASE & (SSEG_SIZE - 1))
     32
     33#ifndef __ASSEMBLY__
     34
     35#include <linux/pfn.h>
     36
     37#define virt_to_pfn(kaddr)      (__pa(kaddr) >> PAGE_SHIFT)
     38#define pfn_to_virt(pfn)        __va((pfn) << PAGE_SHIFT)
     39
     40#define virt_addr_valid(kaddr)  ((void *)(kaddr) >= (void *)PAGE_OFFSET && \
     41			(void *)(kaddr) < high_memory)
     42#define pfn_valid(pfn)		((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
     43
     44extern void *memset(void *dest, int c, size_t l);
     45extern void *memcpy(void *to, const void *from, size_t l);
     46
     47#define clear_page(page)	memset((page), 0, PAGE_SIZE)
     48#define copy_page(to, from)	memcpy((to), (from), PAGE_SIZE)
     49
     50#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
     51#define phys_to_page(paddr)	(pfn_to_page(PFN_DOWN(paddr)))
     52
     53struct page;
     54
     55#include <abi/page.h>
     56
     57struct vm_area_struct;
     58
     59typedef struct { unsigned long pte_low; } pte_t;
     60#define pte_val(x)	((x).pte_low)
     61
     62typedef struct { unsigned long pgd; } pgd_t;
     63typedef struct { unsigned long pgprot; } pgprot_t;
     64typedef struct page *pgtable_t;
     65
     66#define pgd_val(x)	((x).pgd)
     67#define pgprot_val(x)	((x).pgprot)
     68
     69#define ptep_buddy(x)	((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
     70
     71#define __pte(x)	((pte_t) { (x) })
     72#define __pgd(x)	((pgd_t) { (x) })
     73#define __pgprot(x)	((pgprot_t) { (x) })
     74
     75extern unsigned long va_pa_offset;
     76
     77#define ARCH_PFN_OFFSET	PFN_DOWN(va_pa_offset + PHYS_OFFSET_OFFSET)
     78
     79#define __pa(x)		 ((unsigned long)(x) - PAGE_OFFSET + va_pa_offset)
     80#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - va_pa_offset))
     81
     82#define __pa_symbol(x)	__pa(RELOC_HIDE((unsigned long)(x), 0))
     83
     84#define MAP_NR(x)	PFN_DOWN((unsigned long)(x) - PAGE_OFFSET - \
     85				 PHYS_OFFSET_OFFSET)
     86#define virt_to_page(x)	(mem_map + MAP_NR(x))
     87
     88#define pfn_to_kaddr(x)	__va(PFN_PHYS(x))
     89
     90#include <asm-generic/memory_model.h>
     91#include <asm-generic/getorder.h>
     92
     93#endif /* !__ASSEMBLY__ */
     94#endif /* __ASM_CSKY_PAGE_H */