84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
#ifndef _ASM_RISCV_VMALLOC_H
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#define _ASM_RISCV_VMALLOC_H
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#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
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extern bool pgtable_l4_enabled, pgtable_l5_enabled;
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#define IOREMAP_MAX_ORDER (PUD_SHIFT)
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#define arch_vmap_pud_supported arch_vmap_pud_supported
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static inline bool arch_vmap_pud_supported(pgprot_t prot)
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{
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return pgtable_l4_enabled || pgtable_l5_enabled;
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}
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#define arch_vmap_pmd_supported arch_vmap_pmd_supported
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static inline bool arch_vmap_pmd_supported(pgprot_t prot)
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{
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return true;
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}
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#ifdef CONFIG_RISCV_ISA_SVNAPOT
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#include <linux/pgtable.h>
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#define arch_vmap_pte_range_map_size arch_vmap_pte_range_map_size
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static inline unsigned long arch_vmap_pte_range_map_size(unsigned long addr, unsigned long end,
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u64 pfn, unsigned int max_page_shift)
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{
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unsigned long map_size = PAGE_SIZE;
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unsigned long size, order;
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if (!has_svnapot())
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return map_size;
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for_each_napot_order_rev(order) {
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if (napot_cont_shift(order) > max_page_shift)
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continue;
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size = napot_cont_size(order);
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if (end - addr < size)
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continue;
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if (!IS_ALIGNED(addr, size))
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continue;
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if (!IS_ALIGNED(PFN_PHYS(pfn), size))
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continue;
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map_size = size;
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break;
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}
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return map_size;
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}
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#define arch_vmap_pte_supported_shift arch_vmap_pte_supported_shift
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static inline int arch_vmap_pte_supported_shift(unsigned long size)
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{
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int shift = PAGE_SHIFT;
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unsigned long order;
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if (!has_svnapot())
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return shift;
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WARN_ON_ONCE(size >= PMD_SIZE);
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for_each_napot_order_rev(order) {
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if (napot_cont_size(order) > size)
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continue;
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if (!IS_ALIGNED(size, napot_cont_size(order)))
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continue;
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shift = napot_cont_shift(order);
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break;
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}
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return shift;
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}
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#endif /* CONFIG_RISCV_ISA_SVNAPOT */
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#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
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#endif /* _ASM_RISCV_VMALLOC_H */
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