arch: remove tile port

The Tile architecture port was added by Chris Metcalf in 2010, and
maintained until early 2018 when he orphaned it due to his departure
from Mellanox, and nobody else stepped up to maintain it. The product
line is still around in the form of the BlueField SoC, but no longer
uses the Tile architecture.

There are also still products for sale with Tile-GX SoCs, notably the
Mikrotik CCR router family. The products all use old (linux-3.3) kernels
with lots of patches and won't be upgraded by their manufacturers. There
have been efforts to port both OpenWRT and Debian to these, but both
projects have stalled and are very unlikely to be continued in the future.

Given that we are reasonably sure that nobody is still using the port
with an upstream kernel any more, it seems better to remove it now while
the port is in a good shape than to let it bitrot for a few years first.

Cc: Chris Metcalf <chris.d.metcalf@gmail.com>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: http://www.mellanox.com/page/npu_multicore_overview
Link: https://jenkins.debian.net/view/rebootstrap/job/rebootstrap_tilegx_gcc7/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 345 deletions

diff --git a/arch/tile/include/asm/page.h b/arch/tile/include/asm/page.h
deleted file mode 100644
index 498a5f71245d..000000000000
--- a/arch/tile/include/asm/page.h
+++ /dev/null
@@ -1,345 +0,0 @@
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- *   This program is free software; you can redistribute it and/or
- *   modify it under the terms of the GNU General Public License
- *   as published by the Free Software Foundation, version 2.
- *
- *   This program is distributed in the hope that it will be useful, but
- *   WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- *   NON INFRINGEMENT.  See the GNU General Public License for
- *   more details.
- */
-
-#ifndef _ASM_TILE_PAGE_H
-#define _ASM_TILE_PAGE_H
-
-#include <linux/const.h>
-#include <hv/hypervisor.h>
-#include <arch/chip.h>
-
-/* PAGE_SHIFT and HPAGE_SHIFT determine the page sizes. */
-#if defined(CONFIG_PAGE_SIZE_4KB)  /* tilepro only */
-#define PAGE_SHIFT	12
-#define CTX_PAGE_FLAG	HV_CTX_PG_SM_4K
-#elif defined(CONFIG_PAGE_SIZE_16KB)
-#define PAGE_SHIFT	14
-#define CTX_PAGE_FLAG	HV_CTX_PG_SM_16K
-#elif defined(CONFIG_PAGE_SIZE_64KB)
-#define PAGE_SHIFT	16
-#define CTX_PAGE_FLAG	HV_CTX_PG_SM_64K
-#else
-#error Page size not specified in Kconfig
-#endif
-#define HPAGE_SHIFT	HV_LOG2_DEFAULT_PAGE_SIZE_LARGE
-
-#define PAGE_SIZE	(_AC(1, UL) << PAGE_SHIFT)
-#define HPAGE_SIZE	(_AC(1, UL) << HPAGE_SHIFT)
-
-#define PAGE_MASK	(~(PAGE_SIZE - 1))
-#define HPAGE_MASK	(~(HPAGE_SIZE - 1))
-
-/*
- * If the Kconfig doesn't specify, set a maximum zone order that
- * is enough so that we can create huge pages from small pages given
- * the respective sizes of the two page types.  See <linux/mmzone.h>.
- */
-#ifndef CONFIG_FORCE_MAX_ZONEORDER
-#define CONFIG_FORCE_MAX_ZONEORDER (HPAGE_SHIFT - PAGE_SHIFT + 1)
-#endif
-
-#ifndef __ASSEMBLY__
-
-#include <linux/types.h>
-#include <linux/string.h>
-
-struct page;
-
-static inline void clear_page(void *page)
-{
-	memset(page, 0, PAGE_SIZE);
-}
-
-static inline void copy_page(void *to, void *from)
-{
-	memcpy(to, from, PAGE_SIZE);
-}
-
-static inline void clear_user_page(void *page, unsigned long vaddr,
-				struct page *pg)
-{
-	clear_page(page);
-}
-
-static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
-				struct page *topage)
-{
-	copy_page(to, from);
-}
-
-/*
- * Hypervisor page tables are made of the same basic structure.
- */
-
-typedef HV_PTE pte_t;
-typedef HV_PTE pgd_t;
-typedef HV_PTE pgprot_t;
-
-/*
- * User L2 page tables are managed as one L2 page table per page,
- * because we use the page allocator for them.  This keeps the allocation
- * simple, but it's also inefficient, since L2 page tables are much smaller
- * than pages (currently 2KB vs 64KB).  So we should revisit this.
- */
-typedef struct page *pgtable_t;
-
-/* Must be a macro since it is used to create constants. */
-#define __pgprot(val) hv_pte(val)
-
-/* Rarely-used initializers, typically with a "zero" value. */
-#define __pte(x) hv_pte(x)
-#define __pgd(x) hv_pte(x)
-
-static inline u64 pgprot_val(pgprot_t pgprot)
-{
-	return hv_pte_val(pgprot);
-}
-
-static inline u64 pte_val(pte_t pte)
-{
-	return hv_pte_val(pte);
-}
-
-static inline u64 pgd_val(pgd_t pgd)
-{
-	return hv_pte_val(pgd);
-}
-
-#ifdef __tilegx__
-
-typedef HV_PTE pmd_t;
-
-#define __pmd(x) hv_pte(x)
-
-static inline u64 pmd_val(pmd_t pmd)
-{
-	return hv_pte_val(pmd);
-}
-
-#endif
-
-static inline __attribute_const__ int get_order(unsigned long size)
-{
-	return BITS_PER_LONG - __builtin_clzl((size - 1) >> PAGE_SHIFT);
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
-
-#define HUGE_MAX_HSTATE		6
-
-#ifdef CONFIG_HUGETLB_PAGE
-#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
-#endif
-
-/* Allow overriding how much VA or PA the kernel will use. */
-#define MAX_PA_WIDTH CHIP_PA_WIDTH()
-#define MAX_VA_WIDTH CHIP_VA_WIDTH()
-
-/* Each memory controller has PAs distinct in their high bits. */
-#define NR_PA_HIGHBIT_SHIFT (MAX_PA_WIDTH - CHIP_LOG_NUM_MSHIMS())
-#define NR_PA_HIGHBIT_VALUES (1 << CHIP_LOG_NUM_MSHIMS())
-#define __pa_to_highbits(pa) ((phys_addr_t)(pa) >> NR_PA_HIGHBIT_SHIFT)
-#define __pfn_to_highbits(pfn) ((pfn) >> (NR_PA_HIGHBIT_SHIFT - PAGE_SHIFT))
-
-#ifdef __tilegx__
-
-/*
- * We reserve the lower half of memory for user-space programs, and the
- * upper half for system code.  We re-map all of physical memory in the
- * upper half, which takes a quarter of our VA space.  Then we have
- * the vmalloc regions.  The supervisor code lives at the highest address,
- * with the hypervisor above that.
- *
- * Loadable kernel modules are placed immediately after the static
- * supervisor code, with each being allocated a 256MB region of
- * address space, so we don't have to worry about the range of "jal"
- * and other branch instructions.
- *
- * For now we keep life simple and just allocate one pmd (4GB) for vmalloc.
- * Similarly, for now we don't play any struct page mapping games.
- */
-
-#if MAX_PA_WIDTH + 2 > MAX_VA_WIDTH
-# error Too much PA to map with the VA available!
-#endif
-
-#define PAGE_OFFSET		(-(_AC(1, UL) << (MAX_VA_WIDTH - 1)))
-#define KERNEL_HIGH_VADDR	_AC(0xfffffff800000000, UL)  /* high 32GB */
-#define FIXADDR_BASE		(KERNEL_HIGH_VADDR - 0x300000000) /* 4 GB */
-#define FIXADDR_TOP		(KERNEL_HIGH_VADDR - 0x200000000) /* 4 GB */
-#define _VMALLOC_START		FIXADDR_TOP
-#define MEM_SV_START		(KERNEL_HIGH_VADDR - 0x100000000) /* 256 MB */
-#define MEM_MODULE_START	(MEM_SV_START + (256*1024*1024)) /* 256 MB */
-#define MEM_MODULE_END		(MEM_MODULE_START + (256*1024*1024))
-
-#else /* !__tilegx__ */
-
-/*
- * A PAGE_OFFSET of 0xC0000000 means that the kernel has
- * a virtual address space of one gigabyte, which limits the
- * amount of physical memory you can use to about 768MB.
- * If you want more physical memory than this then see the CONFIG_HIGHMEM
- * option in the kernel configuration.
- *
- * The top 16MB chunk in the table below is unavailable to Linux.  Since
- * the kernel interrupt vectors must live at ether 0xfe000000 or 0xfd000000
- * (depending on whether the kernel is at PL2 or Pl1), we map all of the
- * bottom of RAM at this address with a huge page table entry to minimize
- * its ITLB footprint (as well as at PAGE_OFFSET).  The last architected
- * requirement is that user interrupt vectors live at 0xfc000000, so we
- * make that range of memory available to user processes.  The remaining
- * regions are sized as shown; the first four addresses use the PL 1
- * values, and after that, we show "typical" values, since the actual
- * addresses depend on kernel #defines.
- *
- * MEM_HV_START                    0xfe000000
- * MEM_SV_START  (kernel code)     0xfd000000
- * MEM_USER_INTRPT (user vector)   0xfc000000
- * FIX_KMAP_xxx                    0xfa000000 (via NR_CPUS * KM_TYPE_NR)
- * PKMAP_BASE                      0xf9000000 (via LAST_PKMAP)
- * VMALLOC_START                   0xf7000000 (via VMALLOC_RESERVE)
- * mapped LOWMEM                   0xc0000000
- */
-
-#define MEM_USER_INTRPT		_AC(0xfc000000, UL)
-#define MEM_SV_START		_AC(0xfd000000, UL)
-#define MEM_HV_START		_AC(0xfe000000, UL)
-
-#define INTRPT_SIZE		0x4000
-
-/* Tolerate page size larger than the architecture interrupt region size. */
-#if PAGE_SIZE > INTRPT_SIZE
-#undef INTRPT_SIZE
-#define INTRPT_SIZE PAGE_SIZE
-#endif
-
-#define KERNEL_HIGH_VADDR	MEM_USER_INTRPT
-#define FIXADDR_TOP		(KERNEL_HIGH_VADDR - PAGE_SIZE)
-
-#define PAGE_OFFSET		_AC(CONFIG_PAGE_OFFSET, UL)
-
-/* On 32-bit architectures we mix kernel modules in with other vmaps. */
-#define MEM_MODULE_START	VMALLOC_START
-#define MEM_MODULE_END		VMALLOC_END
-
-#endif /* __tilegx__ */
-
-#if !defined(__ASSEMBLY__) && !defined(VDSO_BUILD)
-
-#ifdef CONFIG_HIGHMEM
-
-/* Map kernel virtual addresses to page frames, in HPAGE_SIZE chunks. */
-extern unsigned long pbase_map[];
-extern void *vbase_map[];
-
-static inline unsigned long kaddr_to_pfn(const volatile void *_kaddr)
-{
-	unsigned long kaddr = (unsigned long)_kaddr;
-	return pbase_map[kaddr >> HPAGE_SHIFT] +
-		((kaddr & (HPAGE_SIZE - 1)) >> PAGE_SHIFT);
-}
-
-static inline void *pfn_to_kaddr(unsigned long pfn)
-{
-	return vbase_map[__pfn_to_highbits(pfn)] + (pfn << PAGE_SHIFT);
-}
-
-static inline phys_addr_t virt_to_phys(const volatile void *kaddr)
-{
-	unsigned long pfn = kaddr_to_pfn(kaddr);
-	return ((phys_addr_t)pfn << PAGE_SHIFT) +
-		((unsigned long)kaddr & (PAGE_SIZE-1));
-}
-
-static inline void *phys_to_virt(phys_addr_t paddr)
-{
-	return pfn_to_kaddr(paddr >> PAGE_SHIFT) + (paddr & (PAGE_SIZE-1));
-}
-
-/* With HIGHMEM, we pack PAGE_OFFSET through high_memory with all valid VAs. */
-static inline int virt_addr_valid(const volatile void *kaddr)
-{
-	extern void *high_memory;  /* copied from <linux/mm.h> */
-	return ((unsigned long)kaddr >= PAGE_OFFSET && kaddr < high_memory);
-}
-
-#else /* !CONFIG_HIGHMEM */
-
-static inline unsigned long kaddr_to_pfn(const volatile void *kaddr)
-{
-	return ((unsigned long)kaddr - PAGE_OFFSET) >> PAGE_SHIFT;
-}
-
-static inline void *pfn_to_kaddr(unsigned long pfn)
-{
-	return (void *)((pfn << PAGE_SHIFT) + PAGE_OFFSET);
-}
-
-static inline phys_addr_t virt_to_phys(const volatile void *kaddr)
-{
-	return (phys_addr_t)((unsigned long)kaddr - PAGE_OFFSET);
-}
-
-static inline void *phys_to_virt(phys_addr_t paddr)
-{
-	return (void *)((unsigned long)paddr + PAGE_OFFSET);
-}
-
-/* Check that the given address is within some mapped range of PAs. */
-#define virt_addr_valid(kaddr) pfn_valid(kaddr_to_pfn(kaddr))
-
-#endif /* !CONFIG_HIGHMEM */
-
-/* All callers are not consistent in how they call these functions. */
-#define __pa(kaddr) virt_to_phys((void *)(unsigned long)(kaddr))
-#define __va(paddr) phys_to_virt((phys_addr_t)(paddr))
-
-extern int devmem_is_allowed(unsigned long pagenr);
-
-#ifdef CONFIG_FLATMEM
-static inline int pfn_valid(unsigned long pfn)
-{
-	return pfn < max_mapnr;
-}
-#endif
-
-/* Provide as macros since these require some other headers included. */
-#define page_to_pa(page) ((phys_addr_t)(page_to_pfn(page)) << PAGE_SHIFT)
-#define virt_to_page(kaddr) pfn_to_page(kaddr_to_pfn((void *)(kaddr)))
-#define page_to_virt(page) pfn_to_kaddr(page_to_pfn(page))
-
-/*
- * The kernel text is mapped at MEM_SV_START as read-only.  To allow
- * modifying kernel text, it is also mapped at PAGE_OFFSET as read-write.
- * This macro converts a kernel address to its writable kernel text mapping,
- * which is used to modify the text code on a running kernel by kgdb,
- * ftrace, kprobe, jump label, etc.
- */
-#define ktext_writable_addr(kaddr) \
-	((unsigned long)(kaddr) - MEM_SV_START + PAGE_OFFSET)
-
-struct mm_struct;
-extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
-extern pte_t *virt_to_kpte(unsigned long kaddr);
-
-#endif /* !__ASSEMBLY__ */
-
-#define VM_DATA_DEFAULT_FLAGS \
-	(VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#include <asm-generic/memory_model.h>
-
-#endif /* _ASM_TILE_PAGE_H */