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ARC: retire MMUv1 and MMUv2 support

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There's no known/active customer using them with latest kernels anyways.

Removal helps cleanup code and remove the hack for
MMU_VER to MMU_V[3-4] conversion

Signed-off-by: Vineet Gupta <vgupta@kernel.org>
This commit is contained in:
Vineet Gupta
2019-09-09 17:36:34 -07:00
parent 767a697e75
commit 288ff7de62
7 changed files with 42 additions and 412 deletions
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26
arch/arc/include/asm/pgtable.h
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@@ -35,7 +35,7 @@
#include <linux/bits.h>
#include <asm-generic/pgtable-nopmd.h>
#include <asm/page.h>
#include <asm/mmu.h> /* to propagate CONFIG_ARC_MMU_VER <n> */
#include <asm/mmu.h>
/**************************************************************************
* Page Table Flags
@@ -51,20 +51,6 @@
* (saves some bit shift ops in TLB Miss hdlrs)
*/
#if (CONFIG_ARC_MMU_VER <= 2)
#define _PAGE_ACCESSED (1<<1) /* Page is accessed (S) */
#define _PAGE_CACHEABLE (1<<2) /* Page is cached (H) */
#define _PAGE_EXECUTE (1<<3) /* Page has user execute perm (H) */
#define _PAGE_WRITE (1<<4) /* Page has user write perm (H) */
#define _PAGE_READ (1<<5) /* Page has user read perm (H) */
#define _PAGE_DIRTY (1<<6) /* Page modified (dirty) (S) */
#define _PAGE_SPECIAL (1<<7)
#define _PAGE_GLOBAL (1<<8) /* Page is global (H) */
#define _PAGE_PRESENT (1<<10) /* TLB entry is valid (H) */
#else /* MMU v3 onwards */
#define _PAGE_CACHEABLE (1<<0) /* Page is cached (H) */
#define _PAGE_EXECUTE (1<<1) /* Page has user execute perm (H) */
#define _PAGE_WRITE (1<<2) /* Page has user write perm (H) */
@@ -73,23 +59,15 @@
#define _PAGE_DIRTY (1<<5) /* Page modified (dirty) (S) */
#define _PAGE_SPECIAL (1<<6)
#if (CONFIG_ARC_MMU_VER >= 4)
#define _PAGE_WTHRU (1<<7) /* Page cache mode write-thru (H) */
#endif
#define _PAGE_GLOBAL (1<<8) /* Page is global (H) */
#define _PAGE_PRESENT (1<<9) /* TLB entry is valid (H) */
#if (CONFIG_ARC_MMU_VER >= 4)
#ifdef CONFIG_ARC_MMU_V4
#define _PAGE_HW_SZ (1<<10) /* Page Size indicator (H): 0 normal, 1 super */
#endif
#define _PAGE_SHARED_CODE (1<<11) /* Shared Code page with cmn vaddr
usable for shared TLB entries (H) */
#define _PAGE_UNUSED_BIT (1<<12)
#endif
/* vmalloc permissions */
#define _K_PAGE_PERMS (_PAGE_EXECUTE | _PAGE_WRITE | _PAGE_READ | \
_PAGE_GLOBAL | _PAGE_PRESENT)