diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-27 18:53:26 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-27 18:53:26 -0700 |
commit | bdab225015fbbb45ccd8913f5d7c01b2bf67d8b2 (patch) | |
tree | 5ef62301face958977a084bf2b6c5300296a25f2 /arch/mn10300/mm/cache-mn10300.S | |
parent | 7c5814c7199851c5fe9395d08fc1ab3c8c1531ea (diff) | |
parent | 7c7fcf762e405eb040ee10d22d656a791f616122 (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-mn10300
* git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-mn10300: (44 commits)
MN10300: Save frame pointer in thread_info struct rather than global var
MN10300: Change "Matsushita" to "Panasonic".
MN10300: Create a defconfig for the ASB2364 board
MN10300: Update the ASB2303 defconfig
MN10300: ASB2364: Add support for SMSC911X and SMC911X
MN10300: ASB2364: Handle the IRQ multiplexer in the FPGA
MN10300: Generic time support
MN10300: Specify an ELF HWCAP flag for MN10300 Atomic Operations Unit support
MN10300: Map userspace atomic op regs as a vmalloc page
MN10300: And Panasonic AM34 subarch and implement SMP
MN10300: Delete idle_timestamp from irq_cpustat_t
MN10300: Make various interrupt priority settings configurable
MN10300: Optimise do_csum()
MN10300: Implement atomic ops using atomic ops unit
MN10300: Make the FPU operate in non-lazy mode under SMP
MN10300: SMP TLB flushing
MN10300: Use the [ID]PTEL2 registers rather than [ID]PTEL for TLB control
MN10300: Make the use of PIDR to mark TLB entries controllable
MN10300: Rename __flush_tlb*() to local_flush_tlb*()
MN10300: AM34 erratum requires MMUCTR read and write on exception entry
...
Diffstat (limited to 'arch/mn10300/mm/cache-mn10300.S')
-rw-r--r-- | arch/mn10300/mm/cache-mn10300.S | 289 |
1 files changed, 0 insertions, 289 deletions
diff --git a/arch/mn10300/mm/cache-mn10300.S b/arch/mn10300/mm/cache-mn10300.S deleted file mode 100644 index e839d0aedd6..00000000000 --- a/arch/mn10300/mm/cache-mn10300.S +++ /dev/null @@ -1,289 +0,0 @@ -/* MN10300 CPU core caching routines - * - * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public Licence - * as published by the Free Software Foundation; either version - * 2 of the Licence, or (at your option) any later version. - */ -#include <linux/sys.h> -#include <linux/linkage.h> -#include <asm/smp.h> -#include <asm/page.h> -#include <asm/cache.h> - -#define mn10300_dcache_inv_range_intr_interval \ - +((1 << MN10300_DCACHE_INV_RANGE_INTR_LOG2_INTERVAL) - 1) - -#if mn10300_dcache_inv_range_intr_interval > 0xff -#error MN10300_DCACHE_INV_RANGE_INTR_LOG2_INTERVAL must be 8 or less -#endif - - .am33_2 - - .globl mn10300_icache_inv - .globl mn10300_dcache_inv - .globl mn10300_dcache_inv_range - .globl mn10300_dcache_inv_range2 - .globl mn10300_dcache_inv_page - -############################################################################### -# -# void mn10300_icache_inv(void) -# Invalidate the entire icache -# -############################################################################### - ALIGN -mn10300_icache_inv: - mov CHCTR,a0 - - movhu (a0),d0 - btst CHCTR_ICEN,d0 - beq mn10300_icache_inv_end - - mov epsw,d1 - and ~EPSW_IE,epsw - nop - nop - - # disable the icache - and ~CHCTR_ICEN,d0 - movhu d0,(a0) - - # and wait for it to calm down - setlb - movhu (a0),d0 - btst CHCTR_ICBUSY,d0 - lne - - # invalidate - or CHCTR_ICINV,d0 - movhu d0,(a0) - - # wait for the cache to finish - mov CHCTR,a0 - setlb - movhu (a0),d0 - btst CHCTR_ICBUSY,d0 - lne - - # and reenable it - and ~CHCTR_ICINV,d0 - or CHCTR_ICEN,d0 - movhu d0,(a0) - movhu (a0),d0 - - mov d1,epsw - -mn10300_icache_inv_end: - ret [],0 - -############################################################################### -# -# void mn10300_dcache_inv(void) -# Invalidate the entire dcache -# -############################################################################### - ALIGN -mn10300_dcache_inv: - mov CHCTR,a0 - - movhu (a0),d0 - btst CHCTR_DCEN,d0 - beq mn10300_dcache_inv_end - - mov epsw,d1 - and ~EPSW_IE,epsw - nop - nop - - # disable the dcache - and ~CHCTR_DCEN,d0 - movhu d0,(a0) - - # and wait for it to calm down - setlb - movhu (a0),d0 - btst CHCTR_DCBUSY,d0 - lne - - # invalidate - or CHCTR_DCINV,d0 - movhu d0,(a0) - - # wait for the cache to finish - mov CHCTR,a0 - setlb - movhu (a0),d0 - btst CHCTR_DCBUSY,d0 - lne - - # and reenable it - and ~CHCTR_DCINV,d0 - or CHCTR_DCEN,d0 - movhu d0,(a0) - movhu (a0),d0 - - mov d1,epsw - -mn10300_dcache_inv_end: - ret [],0 - -############################################################################### -# -# void mn10300_dcache_inv_range(unsigned start, unsigned end) -# void mn10300_dcache_inv_range2(unsigned start, unsigned size) -# void mn10300_dcache_inv_page(unsigned start) -# Invalidate a range of addresses on a page in the dcache -# -############################################################################### - ALIGN -mn10300_dcache_inv_page: - mov PAGE_SIZE,d1 -mn10300_dcache_inv_range2: - add d0,d1 -mn10300_dcache_inv_range: - movm [d2,d3,a2],(sp) - mov CHCTR,a2 - - movhu (a2),d2 - btst CHCTR_DCEN,d2 - beq mn10300_dcache_inv_range_end - - and L1_CACHE_TAG_ADDRESS|L1_CACHE_TAG_ENTRY,d0 # round start - # addr down - mov d0,a1 - - add L1_CACHE_BYTES,d1 # round end addr up - and L1_CACHE_TAG_ADDRESS|L1_CACHE_TAG_ENTRY,d1 - - clr d2 # we're going to clear tag ram - # entries - - # read the tags from the tag RAM, and if they indicate a valid dirty - # cache line then invalidate that line - mov DCACHE_TAG(0,0),a0 - mov a1,d0 - and L1_CACHE_TAG_ENTRY,d0 - add d0,a0 # starting dcache tag RAM - # access address - - sub a1,d1 - lsr L1_CACHE_SHIFT,d1 # total number of entries to - # examine - - and ~(L1_CACHE_DISPARITY-1),a1 # determine comparator base - -mn10300_dcache_inv_range_outer_loop: - # disable interrupts - mov epsw,d3 - and ~EPSW_IE,epsw - nop # note that reading CHCTR and - # AND'ing D0 occupy two delay - # slots after disabling - # interrupts - - # disable the dcache - movhu (a2),d0 - and ~CHCTR_DCEN,d0 - movhu d0,(a2) - - # and wait for it to calm down - setlb - movhu (a2),d0 - btst CHCTR_DCBUSY,d0 - lne - -mn10300_dcache_inv_range_loop: - - # process the way 0 slot - mov (L1_CACHE_WAYDISP*0,a0),d0 # read the tag in the way 0 slot - btst L1_CACHE_TAG_VALID,d0 - beq mn10300_dcache_inv_range_skip_0 # jump if this cacheline is not - # valid - - xor a1,d0 - lsr 12,d0 - bne mn10300_dcache_inv_range_skip_0 # jump if not this cacheline - - mov d2,(a0) # kill the tag - -mn10300_dcache_inv_range_skip_0: - - # process the way 1 slot - mov (L1_CACHE_WAYDISP*1,a0),d0 # read the tag in the way 1 slot - btst L1_CACHE_TAG_VALID,d0 - beq mn10300_dcache_inv_range_skip_1 # jump if this cacheline is not - # valid - - xor a1,d0 - lsr 12,d0 - bne mn10300_dcache_inv_range_skip_1 # jump if not this cacheline - - mov d2,(a0) # kill the tag - -mn10300_dcache_inv_range_skip_1: - - # process the way 2 slot - mov (L1_CACHE_WAYDISP*2,a0),d0 # read the tag in the way 2 slot - btst L1_CACHE_TAG_VALID,d0 - beq mn10300_dcache_inv_range_skip_2 # jump if this cacheline is not - # valid - - xor a1,d0 - lsr 12,d0 - bne mn10300_dcache_inv_range_skip_2 # jump if not this cacheline - - mov d2,(a0) # kill the tag - -mn10300_dcache_inv_range_skip_2: - - # process the way 3 slot - mov (L1_CACHE_WAYDISP*3,a0),d0 # read the tag in the way 3 slot - btst L1_CACHE_TAG_VALID,d0 - beq mn10300_dcache_inv_range_skip_3 # jump if this cacheline is not - # valid - - xor a1,d0 - lsr 12,d0 - bne mn10300_dcache_inv_range_skip_3 # jump if not this cacheline - - mov d2,(a0) # kill the tag - -mn10300_dcache_inv_range_skip_3: - - # approx every N steps we re-enable the cache and see if there are any - # interrupts to be processed - # we also break out if we've reached the end of the loop - # (the bottom nibble of the count is zero in both cases) - add L1_CACHE_BYTES,a0 - add L1_CACHE_BYTES,a1 - add -1,d1 - btst mn10300_dcache_inv_range_intr_interval,d1 - bne mn10300_dcache_inv_range_loop - - # wait for the cache to finish what it's doing - setlb - movhu (a2),d0 - btst CHCTR_DCBUSY,d0 - lne - - # and reenable it - or CHCTR_DCEN,d0 - movhu d0,(a2) - movhu (a2),d0 - - # re-enable interrupts - # - we don't bother with delay NOPs as we'll have enough instructions - # before we disable interrupts again to give the interrupts a chance - # to happen - mov d3,epsw - - # go around again if the counter hasn't yet reached zero - add 0,d1 - bne mn10300_dcache_inv_range_outer_loop - -mn10300_dcache_inv_range_end: - ret [d2,d3,a2],12 |