arch: remove m32r port

The Mitsubishi/Renesas m32r architecture has been around for many years,
but the Linux port has been obsolete for a very long time as well, with
the last significant updates done for linux-2.6.14.

While some m32r microcontrollers are still being marketed by Renesas,
those are apparently no longer possible to support, mainly due to the
lack of an external memory interface.

Hirokazu Takata was the maintainer until the architecture got marked
Orphaned in 2014.

Link: http://www.linux-m32r.org/
Link: https://www.renesas.com/en-eu/products/microcontrollers-microprocessors/m32r.html
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 348 deletions

diff --git a/arch/m32r/include/asm/pgtable.h b/arch/m32r/include/asm/pgtable.h
deleted file mode 100644
index eb7f9050c8d6..000000000000
--- a/arch/m32r/include/asm/pgtable.h
+++ /dev/null
@@ -1,348 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_M32R_PGTABLE_H
-#define _ASM_M32R_PGTABLE_H
-
-#include <asm-generic/4level-fixup.h>
-
-#ifdef __KERNEL__
-/*
- * The Linux memory management assumes a three-level page table setup. On
- * the M32R, we use that, but "fold" the mid level into the top-level page
- * table, so that we physically have the same two-level page table as the
- * M32R mmu expects.
- *
- * This file contains the functions and defines necessary to modify and use
- * the M32R page table tree.
- */
-
-/* CAUTION!: If you change macro definitions in this file, you might have to
- * change arch/m32r/mmu.S manually.
- */
-
-#ifndef __ASSEMBLY__
-
-#include <linux/threads.h>
-#include <linux/bitops.h>
-#include <asm/processor.h>
-#include <asm/addrspace.h>
-#include <asm/page.h>
-
-struct mm_struct;
-struct vm_area_struct;
-
-extern pgd_t swapper_pg_dir[1024];
-extern void paging_init(void);
-
-/*
- * ZERO_PAGE is a global shared page that is always zero: used
- * for zero-mapped memory areas etc..
- */
-extern unsigned long empty_zero_page[1024];
-#define ZERO_PAGE(vaddr)	(virt_to_page(empty_zero_page))
-
-#endif /* !__ASSEMBLY__ */
-
-#ifndef __ASSEMBLY__
-#include <asm/pgtable-2level.h>
-#endif
-
-#define pgtable_cache_init()	do { } while (0)
-
-#define PMD_SIZE	(1UL << PMD_SHIFT)
-#define PMD_MASK	(~(PMD_SIZE - 1))
-#define PGDIR_SIZE	(1UL << PGDIR_SHIFT)
-#define PGDIR_MASK	(~(PGDIR_SIZE - 1))
-
-#define USER_PTRS_PER_PGD	(TASK_SIZE / PGDIR_SIZE)
-#define FIRST_USER_ADDRESS	0UL
-
-#ifndef __ASSEMBLY__
-/* Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts.  That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_START		KSEG2
-#define VMALLOC_END		KSEG3
-
-/*
- *     M32R TLB format
- *
- *     [0]    [1:19]           [20:23]       [24:31]
- *     +-----------------------+----+-------------+
- *     |          VPN          |0000|    ASID     |
- *     +-----------------------+----+-------------+
- *     +-+---------------------+----+-+---+-+-+-+-+
- *     |0         PPN          |0000|N|AC |L|G|V| |
- *     +-+---------------------+----+-+---+-+-+-+-+
- *                                     RWX
- */
-
-#define _PAGE_BIT_DIRTY		0	/* software: page changed */
-#define _PAGE_BIT_PRESENT	1	/* Valid: page is valid */
-#define _PAGE_BIT_GLOBAL	2	/* Global */
-#define _PAGE_BIT_LARGE		3	/* Large */
-#define _PAGE_BIT_EXEC		4	/* Execute */
-#define _PAGE_BIT_WRITE		5	/* Write */
-#define _PAGE_BIT_READ		6	/* Read */
-#define _PAGE_BIT_NONCACHABLE	7	/* Non cachable */
-#define _PAGE_BIT_ACCESSED	8	/* software: page referenced */
-#define _PAGE_BIT_PROTNONE	9	/* software: if not present */
-
-#define _PAGE_DIRTY		(1UL << _PAGE_BIT_DIRTY)
-#define _PAGE_PRESENT		(1UL << _PAGE_BIT_PRESENT)
-#define _PAGE_GLOBAL		(1UL << _PAGE_BIT_GLOBAL)
-#define _PAGE_LARGE		(1UL << _PAGE_BIT_LARGE)
-#define _PAGE_EXEC		(1UL << _PAGE_BIT_EXEC)
-#define _PAGE_WRITE		(1UL << _PAGE_BIT_WRITE)
-#define _PAGE_READ		(1UL << _PAGE_BIT_READ)
-#define _PAGE_NONCACHABLE	(1UL << _PAGE_BIT_NONCACHABLE)
-#define _PAGE_ACCESSED		(1UL << _PAGE_BIT_ACCESSED)
-#define _PAGE_PROTNONE		(1UL << _PAGE_BIT_PROTNONE)
-
-#define _PAGE_TABLE	\
-	( _PAGE_PRESENT | _PAGE_WRITE | _PAGE_READ | _PAGE_ACCESSED \
-	| _PAGE_DIRTY )
-#define _KERNPG_TABLE	\
-	( _PAGE_PRESENT | _PAGE_WRITE | _PAGE_READ | _PAGE_ACCESSED \
-	| _PAGE_DIRTY )
-#define _PAGE_CHG_MASK	\
-	( PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY )
-
-#ifdef CONFIG_MMU
-#define PAGE_NONE	\
-	__pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
-#define PAGE_SHARED	\
-	__pgprot(_PAGE_PRESENT | _PAGE_WRITE | _PAGE_READ | _PAGE_ACCESSED)
-#define PAGE_SHARED_EXEC \
-	__pgprot(_PAGE_PRESENT | _PAGE_EXEC | _PAGE_WRITE | _PAGE_READ \
-		| _PAGE_ACCESSED)
-#define PAGE_COPY	\
-	__pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_ACCESSED)
-#define PAGE_COPY_EXEC	\
-	__pgprot(_PAGE_PRESENT | _PAGE_EXEC | _PAGE_READ | _PAGE_ACCESSED)
-#define PAGE_READONLY	\
-	__pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_ACCESSED)
-#define PAGE_READONLY_EXEC \
-	__pgprot(_PAGE_PRESENT | _PAGE_EXEC | _PAGE_READ | _PAGE_ACCESSED)
-
-#define __PAGE_KERNEL	\
-	( _PAGE_PRESENT | _PAGE_EXEC | _PAGE_WRITE | _PAGE_READ | _PAGE_DIRTY \
-	| _PAGE_ACCESSED )
-#define __PAGE_KERNEL_RO	( __PAGE_KERNEL & ~_PAGE_WRITE )
-#define __PAGE_KERNEL_NOCACHE	( __PAGE_KERNEL | _PAGE_NONCACHABLE)
-
-#define MAKE_GLOBAL(x)	__pgprot((x) | _PAGE_GLOBAL)
-
-#define PAGE_KERNEL		MAKE_GLOBAL(__PAGE_KERNEL)
-#define PAGE_KERNEL_RO		MAKE_GLOBAL(__PAGE_KERNEL_RO)
-#define PAGE_KERNEL_NOCACHE	MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE)
-
-#else
-#define PAGE_NONE		__pgprot(0)
-#define PAGE_SHARED		__pgprot(0)
-#define PAGE_SHARED_EXEC	__pgprot(0)
-#define PAGE_COPY		__pgprot(0)
-#define PAGE_COPY_EXEC		__pgprot(0)
-#define PAGE_READONLY		__pgprot(0)
-#define PAGE_READONLY_EXEC	__pgprot(0)
-
-#define PAGE_KERNEL		__pgprot(0)
-#define PAGE_KERNEL_RO		__pgprot(0)
-#define PAGE_KERNEL_NOCACHE	__pgprot(0)
-#endif /* CONFIG_MMU */
-
-	/* xwr */
-#define __P000	PAGE_NONE
-#define __P001	PAGE_READONLY
-#define __P010	PAGE_COPY
-#define __P011	PAGE_COPY
-#define __P100	PAGE_READONLY_EXEC
-#define __P101	PAGE_READONLY_EXEC
-#define __P110	PAGE_COPY_EXEC
-#define __P111	PAGE_COPY_EXEC
-
-#define __S000	PAGE_NONE
-#define __S001	PAGE_READONLY
-#define __S010	PAGE_SHARED
-#define __S011	PAGE_SHARED
-#define __S100	PAGE_READONLY_EXEC
-#define __S101	PAGE_READONLY_EXEC
-#define __S110	PAGE_SHARED_EXEC
-#define __S111	PAGE_SHARED_EXEC
-
-/* page table for 0-4MB for everybody */
-
-#define pte_present(x)	(pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE))
-#define pte_clear(mm,addr,xp)	do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
-
-#define pmd_none(x)	(!pmd_val(x))
-#define pmd_present(x)	(pmd_val(x) & _PAGE_PRESENT)
-#define pmd_clear(xp)	do { set_pmd(xp, __pmd(0)); } while (0)
-#define	pmd_bad(x)	((pmd_val(x) & ~PAGE_MASK) != _KERNPG_TABLE)
-
-#define pages_to_mb(x)	((x) >> (20 - PAGE_SHIFT))
-
-/*
- * The following only work if pte_present() is true.
- * Undefined behaviour if not..
- */
-static inline int pte_dirty(pte_t pte)
-{
-	return pte_val(pte) & _PAGE_DIRTY;
-}
-
-static inline int pte_young(pte_t pte)
-{
-	return pte_val(pte) & _PAGE_ACCESSED;
-}
-
-static inline int pte_write(pte_t pte)
-{
-	return pte_val(pte) & _PAGE_WRITE;
-}
-
-static inline int pte_special(pte_t pte)
-{
-	return 0;
-}
-
-static inline pte_t pte_mkclean(pte_t pte)
-{
-	pte_val(pte) &= ~_PAGE_DIRTY;
-	return pte;
-}
-
-static inline pte_t pte_mkold(pte_t pte)
-{
-	pte_val(pte) &= ~_PAGE_ACCESSED;
-	return pte;
-}
-
-static inline pte_t pte_wrprotect(pte_t pte)
-{
-	pte_val(pte) &= ~_PAGE_WRITE;
-	return pte;
-}
-
-static inline pte_t pte_mkdirty(pte_t pte)
-{
-	pte_val(pte) |= _PAGE_DIRTY;
-	return pte;
-}
-
-static inline pte_t pte_mkyoung(pte_t pte)
-{
-	pte_val(pte) |= _PAGE_ACCESSED;
-	return pte;
-}
-
-static inline pte_t pte_mkwrite(pte_t pte)
-{
-	pte_val(pte) |= _PAGE_WRITE;
-	return pte;
-}
-
-static inline pte_t pte_mkspecial(pte_t pte)
-{
-	return pte;
-}
-
-static inline  int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
-{
-	return test_and_clear_bit(_PAGE_BIT_ACCESSED, ptep);
-}
-
-static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
-{
-	clear_bit(_PAGE_BIT_WRITE, ptep);
-}
-
-/*
- * Macro and implementation to make a page protection as uncachable.
- */
-static inline pgprot_t pgprot_noncached(pgprot_t _prot)
-{
-	unsigned long prot = pgprot_val(_prot);
-
-	prot |= _PAGE_NONCACHABLE;
-	return __pgprot(prot);
-}
-
-#define pgprot_writecombine(prot) pgprot_noncached(prot)
-
-/*
- * Conversion functions: convert a page and protection to a page entry,
- * and a page entry and page directory to the page they refer to.
- */
-#define mk_pte(page, pgprot)	pfn_pte(page_to_pfn(page), pgprot)
-
-static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
-{
-	set_pte(&pte, __pte((pte_val(pte) & _PAGE_CHG_MASK) \
-		| pgprot_val(newprot)));
-
-	return pte;
-}
-
-/*
- * Conversion functions: convert a page and protection to a page entry,
- * and a page entry and page directory to the page they refer to.
- */
-
-static inline void pmd_set(pmd_t * pmdp, pte_t * ptep)
-{
-	pmd_val(*pmdp) = (((unsigned long) ptep) & PAGE_MASK);
-}
-
-#define pmd_page_vaddr(pmd)	\
-	((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
-
-#ifndef CONFIG_DISCONTIGMEM
-#define pmd_page(pmd)	(mem_map + ((pmd_val(pmd) >> PAGE_SHIFT) - PFN_BASE))
-#endif /* !CONFIG_DISCONTIGMEM */
-
-/* to find an entry in a page-table-directory. */
-#define pgd_index(address)	\
-	(((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
-
-#define pgd_offset(mm, address)	((mm)->pgd + pgd_index(address))
-
-/* to find an entry in a kernel page-table-directory */
-#define pgd_offset_k(address)	pgd_offset(&init_mm, address)
-
-#define pmd_index(address)	\
-	(((address) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
-
-#define pte_index(address)	\
-	(((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
-#define pte_offset_kernel(dir, address)	\
-	((pte_t *)pmd_page_vaddr(*(dir)) + pte_index(address))
-#define pte_offset_map(dir, address)	\
-	((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))
-#define pte_unmap(pte)		do { } while (0)
-
-/* Encode and de-code a swap entry */
-#define __swp_type(x)			(((x).val >> 2) & 0x1f)
-#define __swp_offset(x)			((x).val >> 10)
-#define __swp_entry(type, offset)	\
-	((swp_entry_t) { ((type) << 2) | ((offset) << 10) })
-#define __pte_to_swp_entry(pte)		((swp_entry_t) { pte_val(pte) })
-#define __swp_entry_to_pte(x)		((pte_t) { (x).val })
-
-#endif /* !__ASSEMBLY__ */
-
-/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
-#define kern_addr_valid(addr)	(1)
-
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
-#define __HAVE_ARCH_PTEP_SET_WRPROTECT
-#define __HAVE_ARCH_PTE_SAME
-#include <asm-generic/pgtable.h>
-
-#endif /* __KERNEL__ */
-
-#endif /* _ASM_M32R_PGTABLE_H */