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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arm/include/asm/pgtable-nommu.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/include/asm/pgtable-nommu.h')
-rw-r--r--arch/arm/include/asm/pgtable-nommu.h91
1 files changed, 91 insertions, 0 deletions
diff --git a/arch/arm/include/asm/pgtable-nommu.h b/arch/arm/include/asm/pgtable-nommu.h
new file mode 100644
index 000000000..090011394
--- /dev/null
+++ b/arch/arm/include/asm/pgtable-nommu.h
@@ -0,0 +1,91 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * arch/arm/include/asm/pgtable-nommu.h
+ *
+ * Copyright (C) 1995-2002 Russell King
+ * Copyright (C) 2004 Hyok S. Choi
+ */
+#ifndef _ASMARM_PGTABLE_NOMMU_H
+#define _ASMARM_PGTABLE_NOMMU_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/slab.h>
+#include <asm/processor.h>
+#include <asm/page.h>
+
+/*
+ * Trivial page table functions.
+ */
+#define pgd_present(pgd) (1)
+#define pgd_none(pgd) (0)
+#define pgd_bad(pgd) (0)
+#define pgd_clear(pgdp)
+#define kern_addr_valid(addr) (1)
+/* FIXME */
+/*
+ * PMD_SHIFT determines the size of the area a second-level page table can map
+ * PGDIR_SHIFT determines what a third-level page table entry can map
+ */
+#define PGDIR_SHIFT 21
+
+#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
+#define PGDIR_MASK (~(PGDIR_SIZE-1))
+/* FIXME */
+
+#define PAGE_NONE __pgprot(0)
+#define PAGE_SHARED __pgprot(0)
+#define PAGE_COPY __pgprot(0)
+#define PAGE_READONLY __pgprot(0)
+#define PAGE_KERNEL __pgprot(0)
+
+#define swapper_pg_dir ((pgd_t *) 0)
+
+
+typedef pte_t *pte_addr_t;
+
+/*
+ * Mark the prot value as uncacheable and unbufferable.
+ */
+#define pgprot_noncached(prot) (prot)
+#define pgprot_writecombine(prot) (prot)
+#define pgprot_device(prot) (prot)
+
+
+/*
+ * These would be in other places but having them here reduces the diffs.
+ */
+extern unsigned int kobjsize(const void *objp);
+
+/*
+ * All 32bit addresses are effectively valid for vmalloc...
+ * Sort of meaningless for non-VM targets.
+ */
+#define VMALLOC_START 0UL
+#define VMALLOC_END 0xffffffffUL
+
+#define FIRST_USER_ADDRESS 0UL
+
+#else
+
+/*
+ * dummy tlb and user structures.
+ */
+#define v3_tlb_fns (0)
+#define v4_tlb_fns (0)
+#define v4wb_tlb_fns (0)
+#define v4wbi_tlb_fns (0)
+#define v6wbi_tlb_fns (0)
+#define v7wbi_tlb_fns (0)
+
+#define v3_user_fns (0)
+#define v4_user_fns (0)
+#define v4_mc_user_fns (0)
+#define v4wb_user_fns (0)
+#define v4wt_user_fns (0)
+#define v6_user_fns (0)
+#define xscale_mc_user_fns (0)
+
+#endif /*__ASSEMBLY__*/
+
+#endif /* _ASMARM_PGTABLE_H */