309 lines
7.6 KiB
ArmAsm
Executable File
309 lines
7.6 KiB
ArmAsm
Executable File
/* MN10300 CPU core caching routines, using indirect regs on cache controller
|
|
*
|
|
* 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>
|
|
#include <asm/irqflags.h>
|
|
|
|
.am33_2
|
|
|
|
#ifndef CONFIG_SMP
|
|
.globl mn10300_dcache_flush
|
|
.globl mn10300_dcache_flush_page
|
|
.globl mn10300_dcache_flush_range
|
|
.globl mn10300_dcache_flush_range2
|
|
.globl mn10300_dcache_flush_inv
|
|
.globl mn10300_dcache_flush_inv_page
|
|
.globl mn10300_dcache_flush_inv_range
|
|
.globl mn10300_dcache_flush_inv_range2
|
|
|
|
mn10300_dcache_flush = mn10300_local_dcache_flush
|
|
mn10300_dcache_flush_page = mn10300_local_dcache_flush_page
|
|
mn10300_dcache_flush_range = mn10300_local_dcache_flush_range
|
|
mn10300_dcache_flush_range2 = mn10300_local_dcache_flush_range2
|
|
mn10300_dcache_flush_inv = mn10300_local_dcache_flush_inv
|
|
mn10300_dcache_flush_inv_page = mn10300_local_dcache_flush_inv_page
|
|
mn10300_dcache_flush_inv_range = mn10300_local_dcache_flush_inv_range
|
|
mn10300_dcache_flush_inv_range2 = mn10300_local_dcache_flush_inv_range2
|
|
|
|
#endif /* !CONFIG_SMP */
|
|
|
|
###############################################################################
|
|
#
|
|
# void mn10300_local_dcache_flush(void)
|
|
# Flush the entire data cache back to RAM
|
|
#
|
|
###############################################################################
|
|
ALIGN
|
|
.globl mn10300_local_dcache_flush
|
|
.type mn10300_local_dcache_flush,@function
|
|
mn10300_local_dcache_flush:
|
|
movhu (CHCTR),d0
|
|
btst CHCTR_DCEN,d0
|
|
beq mn10300_local_dcache_flush_end
|
|
|
|
mov DCPGCR,a0
|
|
|
|
LOCAL_CLI_SAVE(d1)
|
|
|
|
# wait for busy bit of area purge
|
|
setlb
|
|
mov (a0),d0
|
|
btst DCPGCR_DCPGBSY,d0
|
|
lne
|
|
|
|
# set mask
|
|
clr d0
|
|
mov d0,(DCPGMR)
|
|
|
|
# area purge
|
|
#
|
|
# DCPGCR = DCPGCR_DCP
|
|
#
|
|
mov DCPGCR_DCP,d0
|
|
mov d0,(a0)
|
|
|
|
# wait for busy bit of area purge
|
|
setlb
|
|
mov (a0),d0
|
|
btst DCPGCR_DCPGBSY,d0
|
|
lne
|
|
|
|
LOCAL_IRQ_RESTORE(d1)
|
|
|
|
mn10300_local_dcache_flush_end:
|
|
ret [],0
|
|
.size mn10300_local_dcache_flush,.-mn10300_local_dcache_flush
|
|
|
|
###############################################################################
|
|
#
|
|
# void mn10300_local_dcache_flush_page(unsigned long start)
|
|
# void mn10300_local_dcache_flush_range(unsigned long start, unsigned long end)
|
|
# void mn10300_local_dcache_flush_range2(unsigned long start, unsigned long size)
|
|
# Flush a range of addresses on a page in the dcache
|
|
#
|
|
###############################################################################
|
|
ALIGN
|
|
.globl mn10300_local_dcache_flush_page
|
|
.globl mn10300_local_dcache_flush_range
|
|
.globl mn10300_local_dcache_flush_range2
|
|
.type mn10300_local_dcache_flush_page,@function
|
|
.type mn10300_local_dcache_flush_range,@function
|
|
.type mn10300_local_dcache_flush_range2,@function
|
|
mn10300_local_dcache_flush_page:
|
|
and ~(PAGE_SIZE-1),d0
|
|
mov PAGE_SIZE,d1
|
|
mn10300_local_dcache_flush_range2:
|
|
add d0,d1
|
|
mn10300_local_dcache_flush_range:
|
|
movm [d2,d3,a2],(sp)
|
|
|
|
movhu (CHCTR),d2
|
|
btst CHCTR_DCEN,d2
|
|
beq mn10300_local_dcache_flush_range_end
|
|
|
|
# calculate alignsize
|
|
#
|
|
# alignsize = L1_CACHE_BYTES;
|
|
# for (i = (end - start - 1) / L1_CACHE_BYTES ; i > 0; i >>= 1)
|
|
# alignsize <<= 1;
|
|
# d2 = alignsize;
|
|
#
|
|
mov L1_CACHE_BYTES,d2
|
|
sub d0,d1,d3
|
|
add -1,d3
|
|
lsr L1_CACHE_SHIFT,d3
|
|
beq 2f
|
|
1:
|
|
add d2,d2
|
|
lsr 1,d3
|
|
bne 1b
|
|
2:
|
|
mov d1,a1 # a1 = end
|
|
|
|
LOCAL_CLI_SAVE(d3)
|
|
mov DCPGCR,a0
|
|
|
|
# wait for busy bit of area purge
|
|
setlb
|
|
mov (a0),d1
|
|
btst DCPGCR_DCPGBSY,d1
|
|
lne
|
|
|
|
# determine the mask
|
|
mov d2,d1
|
|
add -1,d1
|
|
not d1 # d1 = mask = ~(alignsize-1)
|
|
mov d1,(DCPGMR)
|
|
|
|
and d1,d0,a2 # a2 = mask & start
|
|
|
|
dcpgloop:
|
|
# area purge
|
|
mov a2,d0
|
|
or DCPGCR_DCP,d0
|
|
mov d0,(a0) # DCPGCR = (mask & start) | DCPGCR_DCP
|
|
|
|
# wait for busy bit of area purge
|
|
setlb
|
|
mov (a0),d1
|
|
btst DCPGCR_DCPGBSY,d1
|
|
lne
|
|
|
|
# check purge of end address
|
|
add d2,a2 # a2 += alignsize
|
|
cmp a1,a2 # if (a2 < end) goto dcpgloop
|
|
bns dcpgloop
|
|
|
|
LOCAL_IRQ_RESTORE(d3)
|
|
|
|
mn10300_local_dcache_flush_range_end:
|
|
ret [d2,d3,a2],12
|
|
|
|
.size mn10300_local_dcache_flush_page,.-mn10300_local_dcache_flush_page
|
|
.size mn10300_local_dcache_flush_range,.-mn10300_local_dcache_flush_range
|
|
.size mn10300_local_dcache_flush_range2,.-mn10300_local_dcache_flush_range2
|
|
|
|
###############################################################################
|
|
#
|
|
# void mn10300_local_dcache_flush_inv(void)
|
|
# Flush the entire data cache and invalidate all entries
|
|
#
|
|
###############################################################################
|
|
ALIGN
|
|
.globl mn10300_local_dcache_flush_inv
|
|
.type mn10300_local_dcache_flush_inv,@function
|
|
mn10300_local_dcache_flush_inv:
|
|
movhu (CHCTR),d0
|
|
btst CHCTR_DCEN,d0
|
|
beq mn10300_local_dcache_flush_inv_end
|
|
|
|
mov DCPGCR,a0
|
|
|
|
LOCAL_CLI_SAVE(d1)
|
|
|
|
# wait for busy bit of area purge & invalidate
|
|
setlb
|
|
mov (a0),d0
|
|
btst DCPGCR_DCPGBSY,d0
|
|
lne
|
|
|
|
# set the mask to cover everything
|
|
clr d0
|
|
mov d0,(DCPGMR)
|
|
|
|
# area purge & invalidate
|
|
mov DCPGCR_DCP|DCPGCR_DCI,d0
|
|
mov d0,(a0)
|
|
|
|
# wait for busy bit of area purge & invalidate
|
|
setlb
|
|
mov (a0),d0
|
|
btst DCPGCR_DCPGBSY,d0
|
|
lne
|
|
|
|
LOCAL_IRQ_RESTORE(d1)
|
|
|
|
mn10300_local_dcache_flush_inv_end:
|
|
ret [],0
|
|
.size mn10300_local_dcache_flush_inv,.-mn10300_local_dcache_flush_inv
|
|
|
|
###############################################################################
|
|
#
|
|
# void mn10300_local_dcache_flush_inv_page(unsigned long start)
|
|
# void mn10300_local_dcache_flush_inv_range(unsigned long start, unsigned long end)
|
|
# void mn10300_local_dcache_flush_inv_range2(unsigned long start, unsigned long size)
|
|
# Flush and invalidate a range of addresses on a page in the dcache
|
|
#
|
|
###############################################################################
|
|
ALIGN
|
|
.globl mn10300_local_dcache_flush_inv_page
|
|
.globl mn10300_local_dcache_flush_inv_range
|
|
.globl mn10300_local_dcache_flush_inv_range2
|
|
.type mn10300_local_dcache_flush_inv_page,@function
|
|
.type mn10300_local_dcache_flush_inv_range,@function
|
|
.type mn10300_local_dcache_flush_inv_range2,@function
|
|
mn10300_local_dcache_flush_inv_page:
|
|
and ~(PAGE_SIZE-1),d0
|
|
mov PAGE_SIZE,d1
|
|
mn10300_local_dcache_flush_inv_range2:
|
|
add d0,d1
|
|
mn10300_local_dcache_flush_inv_range:
|
|
movm [d2,d3,a2],(sp)
|
|
|
|
movhu (CHCTR),d2
|
|
btst CHCTR_DCEN,d2
|
|
beq mn10300_local_dcache_flush_inv_range_end
|
|
|
|
# calculate alignsize
|
|
#
|
|
# alignsize = L1_CACHE_BYTES;
|
|
# for (i = (end - start - 1) / L1_CACHE_BYTES; i > 0; i >>= 1)
|
|
# alignsize <<= 1;
|
|
# d2 = alignsize
|
|
#
|
|
mov L1_CACHE_BYTES,d2
|
|
sub d0,d1,d3
|
|
add -1,d3
|
|
lsr L1_CACHE_SHIFT,d3
|
|
beq 2f
|
|
1:
|
|
add d2,d2
|
|
lsr 1,d3
|
|
bne 1b
|
|
2:
|
|
mov d1,a1 # a1 = end
|
|
|
|
LOCAL_CLI_SAVE(d3)
|
|
mov DCPGCR,a0
|
|
|
|
# wait for busy bit of area purge & invalidate
|
|
setlb
|
|
mov (a0),d1
|
|
btst DCPGCR_DCPGBSY,d1
|
|
lne
|
|
|
|
# set the mask
|
|
mov d2,d1
|
|
add -1,d1
|
|
not d1 # d1 = mask = ~(alignsize-1)
|
|
mov d1,(DCPGMR)
|
|
|
|
and d1,d0,a2 # a2 = mask & start
|
|
|
|
dcpgivloop:
|
|
# area purge & invalidate
|
|
mov a2,d0
|
|
or DCPGCR_DCP|DCPGCR_DCI,d0
|
|
mov d0,(a0) # DCPGCR = (mask & start)|DCPGCR_DCP|DCPGCR_DCI
|
|
|
|
# wait for busy bit of area purge & invalidate
|
|
setlb
|
|
mov (a0),d1
|
|
btst DCPGCR_DCPGBSY,d1
|
|
lne
|
|
|
|
# check purge & invalidate of end address
|
|
add d2,a2 # a2 += alignsize
|
|
cmp a1,a2 # if (a2 < end) goto dcpgivloop
|
|
bns dcpgivloop
|
|
|
|
LOCAL_IRQ_RESTORE(d3)
|
|
|
|
mn10300_local_dcache_flush_inv_range_end:
|
|
ret [d2,d3,a2],12
|
|
.size mn10300_local_dcache_flush_inv_page,.-mn10300_local_dcache_flush_inv_page
|
|
.size mn10300_local_dcache_flush_inv_range,.-mn10300_local_dcache_flush_inv_range
|
|
.size mn10300_local_dcache_flush_inv_range2,.-mn10300_local_dcache_flush_inv_range2
|