| /* 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 |
