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This is a mixture ofcMichael McTernan's patch and the existing cplb-mpu code.
We ditch the old cplb-nompu implementation, which is a good example of
why a good algorithm in a HLL is preferrable to a bad algorithm written in
assembly. Rather than try to construct a table of all posible CPLBs and
search it, we just create a (smaller) table of memory regions and
their attributes. Some of the data structures are now unified for both
the mpu and nompu cases. A lot of needless complexity in cplbinit.c is
removed.
Further optimizations:
* compile cplbmgr.c with a lot of -ffixed-reg options, and omit saving
these registers on the stack when entering a CPLB exception.
* lose cli/nop/nop/sti sequences for some workarounds - these don't
* make
sense in an exception context
Additional code unification should be possible after this.
[Mike Frysinger <vapier.adi@gmail.com>:
- convert CPP if statements to C if statements
- remove redundant statements
- use a do...while loop rather than a for loop to get slightly better
optimization and to avoid gcc "may be used uninitialized" warnings ...
we know that the [id]cplb_nr_bounds variables will never be 0, so this
is OK
- the no-mpu code was the last user of MAX_MEM_SIZE and with that rewritten,
we can punt it
- add some BUG_ON() checks to make sure we dont overflow the small
cplb_bounds array
- add i/d cplb entries for the bootrom because there is functions/data in
there we want to access
- we do not need a NULL trailing entry as any time we access the bounds
arrays, we use the nr_bounds variable
]
Signed-off-by: Michael McTernan <mmcternan@airvana.com>
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
124 lines
4.2 KiB
C
124 lines
4.2 KiB
C
/*
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* File: include/asm-blackfin/cplb.h
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* Based on: include/asm-blackfin/mach-bf537/bf537.h
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* Author: Robin Getz <rgetz@blackfin.uclinux.org>
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*
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* Created: 2000
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* Description: Common CPLB definitions for CPLB init
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*
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* Modified:
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* Copyright 2004-2007 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _CPLB_H
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#define _CPLB_H
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#include <mach/anomaly.h>
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#define SDRAM_IGENERIC (CPLB_L1_CHBL | CPLB_USER_RD | CPLB_VALID | CPLB_PORTPRIO)
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#define SDRAM_IKERNEL (SDRAM_IGENERIC | CPLB_LOCK)
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#define L1_IMEMORY ( CPLB_USER_RD | CPLB_VALID | CPLB_LOCK)
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#define SDRAM_INON_CHBL ( CPLB_USER_RD | CPLB_VALID)
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/*Use the menuconfig cache policy here - CONFIG_BFIN_WT/CONFIG_BFIN_WB*/
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#if ANOMALY_05000158
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#define ANOMALY_05000158_WORKAROUND 0x200
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#else
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#define ANOMALY_05000158_WORKAROUND 0x0
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#endif
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#define CPLB_COMMON (CPLB_DIRTY | CPLB_SUPV_WR | CPLB_USER_WR | CPLB_USER_RD | CPLB_VALID | ANOMALY_05000158_WORKAROUND)
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#ifdef CONFIG_BFIN_WB /*Write Back Policy */
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#define SDRAM_DGENERIC (CPLB_L1_CHBL | CPLB_COMMON)
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#else /*Write Through */
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#define SDRAM_DGENERIC (CPLB_L1_CHBL | CPLB_WT | CPLB_L1_AOW | CPLB_COMMON)
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#endif
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#define L1_DMEMORY (CPLB_LOCK | CPLB_COMMON)
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#ifdef CONFIG_SMP
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#define L2_ATTR (INITIAL_T | I_CPLB | D_CPLB)
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#define L2_IMEMORY (CPLB_COMMON | CPLB_LOCK)
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#define L2_DMEMORY (CPLB_COMMON | CPLB_LOCK)
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#else
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#ifdef CONFIG_BFIN_L2_CACHEABLE
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#define L2_IMEMORY (SDRAM_IGENERIC)
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#define L2_DMEMORY (SDRAM_DGENERIC)
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#else
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#define L2_IMEMORY (CPLB_COMMON)
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#define L2_DMEMORY (CPLB_COMMON)
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#endif /* CONFIG_BFIN_L2_CACHEABLE */
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#define L2_ATTR (INITIAL_T | SWITCH_T | I_CPLB | D_CPLB)
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#endif /* CONFIG_SMP */
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#define SDRAM_DNON_CHBL (CPLB_COMMON)
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#define SDRAM_EBIU (CPLB_COMMON)
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#define SDRAM_OOPS (CPLB_VALID | ANOMALY_05000158_WORKAROUND | CPLB_LOCK | CPLB_DIRTY)
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#define SIZE_1K 0x00000400 /* 1K */
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#define SIZE_4K 0x00001000 /* 4K */
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#define SIZE_1M 0x00100000 /* 1M */
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#define SIZE_4M 0x00400000 /* 4M */
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#define MAX_CPLBS 16
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#define CPLB_ENABLE_ICACHE_P 0
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#define CPLB_ENABLE_DCACHE_P 1
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#define CPLB_ENABLE_DCACHE2_P 2
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#define CPLB_ENABLE_CPLBS_P 3 /* Deprecated! */
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#define CPLB_ENABLE_ICPLBS_P 4
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#define CPLB_ENABLE_DCPLBS_P 5
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#define CPLB_ENABLE_ICACHE (1<<CPLB_ENABLE_ICACHE_P)
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#define CPLB_ENABLE_DCACHE (1<<CPLB_ENABLE_DCACHE_P)
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#define CPLB_ENABLE_DCACHE2 (1<<CPLB_ENABLE_DCACHE2_P)
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#define CPLB_ENABLE_CPLBS (1<<CPLB_ENABLE_CPLBS_P)
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#define CPLB_ENABLE_ICPLBS (1<<CPLB_ENABLE_ICPLBS_P)
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#define CPLB_ENABLE_DCPLBS (1<<CPLB_ENABLE_DCPLBS_P)
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#define CPLB_ENABLE_ANY_CPLBS CPLB_ENABLE_CPLBS | \
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CPLB_ENABLE_ICPLBS | \
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CPLB_ENABLE_DCPLBS
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#define CPLB_RELOADED 0x0000
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#define CPLB_NO_UNLOCKED 0x0001
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#define CPLB_NO_ADDR_MATCH 0x0002
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#define CPLB_PROT_VIOL 0x0003
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#define CPLB_UNKNOWN_ERR 0x0004
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#define CPLB_DEF_CACHE CPLB_L1_CHBL | CPLB_WT
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#define CPLB_CACHE_ENABLED CPLB_L1_CHBL | CPLB_DIRTY
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#define CPLB_I_PAGE_MGMT CPLB_LOCK | CPLB_VALID
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#define CPLB_D_PAGE_MGMT CPLB_LOCK | CPLB_ALL_ACCESS | CPLB_VALID
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#define CPLB_DNOCACHE CPLB_ALL_ACCESS | CPLB_VALID
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#define CPLB_DDOCACHE CPLB_DNOCACHE | CPLB_DEF_CACHE
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#define CPLB_INOCACHE CPLB_USER_RD | CPLB_VALID
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#define CPLB_IDOCACHE CPLB_INOCACHE | CPLB_L1_CHBL
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#define FAULT_RW (1 << 16)
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#define FAULT_USERSUPV (1 << 17)
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#define FAULT_CPLBBITS 0x0000ffff
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#endif /* _CPLB_H */
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