Blackfin arch: Faster C implementation of no-MPU CPLB handler
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>
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index b58af2b..bbfeecae 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -524,14 +524,6 @@
default 0x0
endmenu
-config MAX_MEM_SIZE
- int "Max SDRAM Memory Size in MBytes"
- depends on !MPU
- default 512
- help
- This is the max memory size that the kernel will create CPLB
- tables for. Your system will not be able to handle any more.
-
#
# Max & Min Speeds for various Chips
#
diff --git a/arch/blackfin/include/asm/context.S b/arch/blackfin/include/asm/context.S
index 9ce21f6..16561ab 100644
--- a/arch/blackfin/include/asm/context.S
+++ b/arch/blackfin/include/asm/context.S
@@ -357,3 +357,42 @@
SYSCFG = [sp++];
csync;
.endm
+
+.macro save_context_cplb
+ [--sp] = (R7:0, P5:0);
+ [--sp] = fp;
+
+ [--sp] = a0.x;
+ [--sp] = a0.w;
+ [--sp] = a1.x;
+ [--sp] = a1.w;
+
+ [--sp] = LC0;
+ [--sp] = LC1;
+ [--sp] = LT0;
+ [--sp] = LT1;
+ [--sp] = LB0;
+ [--sp] = LB1;
+
+ [--sp] = RETS;
+.endm
+
+.macro restore_context_cplb
+ RETS = [sp++];
+
+ LB1 = [sp++];
+ LB0 = [sp++];
+ LT1 = [sp++];
+ LT0 = [sp++];
+ LC1 = [sp++];
+ LC0 = [sp++];
+
+ a1.w = [sp++];
+ a1.x = [sp++];
+ a0.w = [sp++];
+ a0.x = [sp++];
+
+ fp = [sp++];
+
+ (R7:0, P5:0) = [SP++];
+.endm
diff --git a/arch/blackfin/include/asm/cplb-mpu.h b/arch/blackfin/include/asm/cplb-mpu.h
deleted file mode 100644
index 80680ad..0000000
--- a/arch/blackfin/include/asm/cplb-mpu.h
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * File: include/asm-blackfin/cplbinit.h
- * Based on:
- * Author:
- *
- * Created:
- * Description:
- *
- * Modified:
- * Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-#ifndef __ASM_BFIN_CPLB_MPU_H
-#define __ASM_BFIN_CPLB_MPU_H
-#include <linux/threads.h>
-
-struct cplb_entry {
- unsigned long data, addr;
-};
-
-struct mem_region {
- unsigned long start, end;
- unsigned long dcplb_data;
- unsigned long icplb_data;
-};
-
-extern struct cplb_entry dcplb_tbl[NR_CPUS][MAX_CPLBS];
-extern struct cplb_entry icplb_tbl[NR_CPUS][MAX_CPLBS];
-extern int first_switched_icplb;
-extern int first_mask_dcplb;
-extern int first_switched_dcplb;
-
-extern int nr_dcplb_miss[], nr_icplb_miss[], nr_icplb_supv_miss[];
-extern int nr_dcplb_prot[], nr_cplb_flush[];
-
-extern int page_mask_order;
-extern int page_mask_nelts;
-
-extern unsigned long *current_rwx_mask[NR_CPUS];
-
-extern void flush_switched_cplbs(unsigned int);
-extern void set_mask_dcplbs(unsigned long *, unsigned int);
-
-extern void __noreturn panic_cplb_error(int seqstat, struct pt_regs *);
-
-#endif /* __ASM_BFIN_CPLB_MPU_H */
diff --git a/arch/blackfin/include/asm/cplb.h b/arch/blackfin/include/asm/cplb.h
index 5f7545d..ad566ff 100644
--- a/arch/blackfin/include/asm/cplb.h
+++ b/arch/blackfin/include/asm/cplb.h
@@ -116,4 +116,8 @@
#define CPLB_INOCACHE CPLB_USER_RD | CPLB_VALID
#define CPLB_IDOCACHE CPLB_INOCACHE | CPLB_L1_CHBL
+#define FAULT_RW (1 << 16)
+#define FAULT_USERSUPV (1 << 17)
+#define FAULT_CPLBBITS 0x0000ffff
+
#endif /* _CPLB_H */
diff --git a/arch/blackfin/include/asm/cplbinit.h b/arch/blackfin/include/asm/cplbinit.h
index 2aeec87..05b14a6 100644
--- a/arch/blackfin/include/asm/cplbinit.h
+++ b/arch/blackfin/include/asm/cplbinit.h
@@ -32,96 +32,56 @@
#include <asm/blackfin.h>
#include <asm/cplb.h>
+#include <linux/threads.h>
+
+#ifdef CONFIG_CPLB_SWITCH_TAB_L1
+# define PDT_ATTR __attribute__((l1_data))
+#else
+# define PDT_ATTR
+#endif
+
+struct cplb_entry {
+ unsigned long data, addr;
+};
+
+struct cplb_boundary {
+ unsigned long eaddr; /* End of this region. */
+ unsigned long data; /* CPLB data value. */
+};
+
+extern struct cplb_boundary dcplb_bounds[];
+extern struct cplb_boundary icplb_bounds[];
+extern int dcplb_nr_bounds, icplb_nr_bounds;
+
+extern struct cplb_entry dcplb_tbl[NR_CPUS][MAX_CPLBS];
+extern struct cplb_entry icplb_tbl[NR_CPUS][MAX_CPLBS];
+extern int first_switched_icplb;
+extern int first_switched_dcplb;
+
+extern int nr_dcplb_miss[], nr_icplb_miss[], nr_icplb_supv_miss[];
+extern int nr_dcplb_prot[], nr_cplb_flush[];
#ifdef CONFIG_MPU
-#include <asm/cplb-mpu.h>
-extern void bfin_icache_init(struct cplb_entry *icplb_tbl);
-extern void bfin_dcache_init(struct cplb_entry *icplb_tbl);
+extern int first_mask_dcplb;
-#else
+extern int page_mask_order;
+extern int page_mask_nelts;
-#define INITIAL_T 0x1
-#define SWITCH_T 0x2
-#define I_CPLB 0x4
-#define D_CPLB 0x8
+extern unsigned long *current_rwx_mask[NR_CPUS];
-#define ASYNC_MEMORY_CPLB_COVERAGE ((ASYNC_BANK0_SIZE + ASYNC_BANK1_SIZE + \
- ASYNC_BANK2_SIZE + ASYNC_BANK3_SIZE) / SIZE_4M)
+extern void flush_switched_cplbs(unsigned int);
+extern void set_mask_dcplbs(unsigned long *, unsigned int);
-#define CPLB_MEM CONFIG_MAX_MEM_SIZE
-
-/*
-* Number of required data CPLB switchtable entries
-* MEMSIZE / 4 (we mostly install 4M page size CPLBs
-* approx 16 for smaller 1MB page size CPLBs for allignment purposes
-* 1 for L1 Data Memory
-* possibly 1 for L2 Data Memory
-* 1 for CONFIG_DEBUG_HUNT_FOR_ZERO
-* 1 for ASYNC Memory
-*/
-#define MAX_SWITCH_D_CPLBS (((CPLB_MEM / 4) + 16 + 1 + 1 + 1 \
- + ASYNC_MEMORY_CPLB_COVERAGE) * 2)
-
-/*
-* Number of required instruction CPLB switchtable entries
-* MEMSIZE / 4 (we mostly install 4M page size CPLBs
-* approx 12 for smaller 1MB page size CPLBs for allignment purposes
-* 1 for L1 Instruction Memory
-* possibly 1 for L2 Instruction Memory
-* 1 for CONFIG_DEBUG_HUNT_FOR_ZERO
-*/
-#define MAX_SWITCH_I_CPLBS (((CPLB_MEM / 4) + 12 + 1 + 1 + 1) * 2)
-
-/* Number of CPLB table entries, used for cplb-nompu. */
-#define CPLB_TBL_ENTRIES (16 * 4)
-
-enum {
- ZERO_P, L1I_MEM, L1D_MEM, L2_MEM, SDRAM_KERN, SDRAM_RAM_MTD, SDRAM_DMAZ,
- RES_MEM, ASYNC_MEM, OCB_ROM
-};
-
-struct cplb_desc {
- u32 start; /* start address */
- u32 end; /* end address */
- u32 psize; /* prefered size if any otherwise 1MB or 4MB*/
- u16 attr;/* attributes */
- u16 i_conf;/* I-CPLB DATA */
- u16 d_conf;/* D-CPLB DATA */
- u16 valid;/* valid */
- const s8 name[30];/* name */
-};
-
-struct cplb_tab {
- u_long *tab;
- u16 pos;
- u16 size;
-};
-
-extern u_long icplb_tables[NR_CPUS][CPLB_TBL_ENTRIES+1];
-extern u_long dcplb_tables[NR_CPUS][CPLB_TBL_ENTRIES+1];
-
-/* Till here we are discussing about the static memory management model.
- * However, the operating envoronments commonly define more CPLB
- * descriptors to cover the entire addressable memory than will fit into
- * the available on-chip 16 CPLB MMRs. When this happens, the below table
- * will be used which will hold all the potentially required CPLB descriptors
- *
- * This is how Page descriptor Table is implemented in uClinux/Blackfin.
- */
-
-extern u_long ipdt_tables[NR_CPUS][MAX_SWITCH_I_CPLBS+1];
-extern u_long dpdt_tables[NR_CPUS][MAX_SWITCH_D_CPLBS+1];
-#ifdef CONFIG_CPLB_INFO
-extern u_long ipdt_swapcount_tables[NR_CPUS][MAX_SWITCH_I_CPLBS];
-extern u_long dpdt_swapcount_tables[NR_CPUS][MAX_SWITCH_D_CPLBS];
-#endif
-extern void bfin_icache_init(u_long icplbs[]);
-extern void bfin_dcache_init(u_long dcplbs[]);
+extern void __noreturn panic_cplb_error(int seqstat, struct pt_regs *);
#endif /* CONFIG_MPU */
+extern void bfin_icache_init(struct cplb_entry *icplb_tbl);
+extern void bfin_dcache_init(struct cplb_entry *icplb_tbl);
+
#if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
+extern void generate_cplb_tables_all(void);
extern void generate_cplb_tables_cpu(unsigned int cpu);
#endif
#endif
diff --git a/arch/blackfin/include/asm/entry.h b/arch/blackfin/include/asm/entry.h
index c4f721e..d94e4f5 100644
--- a/arch/blackfin/include/asm/entry.h
+++ b/arch/blackfin/include/asm/entry.h
@@ -53,9 +53,11 @@
/* This one pushes RETI without using CLI. Interrupts are enabled. */
#define SAVE_CONTEXT_SYSCALL save_context_syscall
#define SAVE_CONTEXT save_context_with_interrupts
+#define SAVE_CONTEXT_CPLB save_context_cplb
#define RESTORE_ALL_SYS restore_context_no_interrupts
#define RESTORE_CONTEXT restore_context_with_interrupts
+#define RESTORE_CONTEXT_CPLB restore_context_cplb
#endif /* __ASSEMBLY__ */
#endif /* __BFIN_ENTRY_H */
diff --git a/arch/blackfin/kernel/cplb-mpu/Makefile b/arch/blackfin/kernel/cplb-mpu/Makefile
index bd92301..7d70d3b 100644
--- a/arch/blackfin/kernel/cplb-mpu/Makefile
+++ b/arch/blackfin/kernel/cplb-mpu/Makefile
@@ -3,3 +3,8 @@
#
obj-y := cplbinit.o cacheinit.o cplbmgr.o
+
+CFLAGS_cplbmgr.o := -ffixed-I0 -ffixed-I1 -ffixed-I2 -ffixed-I3 \
+ -ffixed-L0 -ffixed-L1 -ffixed-L2 -ffixed-L3 \
+ -ffixed-M0 -ffixed-M1 -ffixed-M2 -ffixed-M3 \
+ -ffixed-B0 -ffixed-B1 -ffixed-B2 -ffixed-B3
diff --git a/arch/blackfin/kernel/cplb-mpu/cplbinit.c b/arch/blackfin/kernel/cplb-mpu/cplbinit.c
index 1ea7c18..bdb9584 100644
--- a/arch/blackfin/kernel/cplb-mpu/cplbinit.c
+++ b/arch/blackfin/kernel/cplb-mpu/cplbinit.c
@@ -107,3 +107,7 @@
while (i_i < MAX_CPLBS)
icplb_tbl[cpu][i_i++].data = 0;
}
+
+void generate_cplb_tables_all(void)
+{
+}
diff --git a/arch/blackfin/kernel/cplb-mpu/cplbmgr.c b/arch/blackfin/kernel/cplb-mpu/cplbmgr.c
index 76bd991..5ef5d1a 100644
--- a/arch/blackfin/kernel/cplb-mpu/cplbmgr.c
+++ b/arch/blackfin/kernel/cplb-mpu/cplbmgr.c
@@ -25,8 +25,13 @@
#include <asm/cplbinit.h>
#include <asm/mmu_context.h>
-#define FAULT_RW (1 << 16)
-#define FAULT_USERSUPV (1 << 17)
+/*
+ * WARNING
+ *
+ * This file is compiled with certain -ffixed-reg options. We have to
+ * make sure not to call any functions here that could clobber these
+ * registers.
+ */
int page_mask_nelts;
int page_mask_order;
diff --git a/arch/blackfin/kernel/cplb-nompu/Makefile b/arch/blackfin/kernel/cplb-nompu/Makefile
index 4010eca..7d70d3b 100644
--- a/arch/blackfin/kernel/cplb-nompu/Makefile
+++ b/arch/blackfin/kernel/cplb-nompu/Makefile
@@ -2,4 +2,9 @@
# arch/blackfin/kernel/cplb-nompu/Makefile
#
-obj-y := cplbinit.o cacheinit.o cplbhdlr.o cplbmgr.o
+obj-y := cplbinit.o cacheinit.o cplbmgr.o
+
+CFLAGS_cplbmgr.o := -ffixed-I0 -ffixed-I1 -ffixed-I2 -ffixed-I3 \
+ -ffixed-L0 -ffixed-L1 -ffixed-L2 -ffixed-L3 \
+ -ffixed-M0 -ffixed-M1 -ffixed-M2 -ffixed-M3 \
+ -ffixed-B0 -ffixed-B1 -ffixed-B2 -ffixed-B3
diff --git a/arch/blackfin/kernel/cplb-nompu/cacheinit.c b/arch/blackfin/kernel/cplb-nompu/cacheinit.c
index 3a385ae..c6ff947 100644
--- a/arch/blackfin/kernel/cplb-nompu/cacheinit.c
+++ b/arch/blackfin/kernel/cplb-nompu/cacheinit.c
@@ -25,19 +25,15 @@
#include <asm/cplbinit.h>
#if defined(CONFIG_BFIN_ICACHE)
-void __cpuinit bfin_icache_init(u_long icplb[])
+void __cpuinit bfin_icache_init(struct cplb_entry *icplb_tbl)
{
- unsigned long *table = icplb;
unsigned long ctrl;
int i;
+ SSYNC();
for (i = 0; i < MAX_CPLBS; i++) {
- unsigned long addr = *table++;
- unsigned long data = *table++;
- if (addr == (unsigned long)-1)
- break;
- bfin_write32(ICPLB_ADDR0 + i * 4, addr);
- bfin_write32(ICPLB_DATA0 + i * 4, data);
+ bfin_write32(ICPLB_ADDR0 + i * 4, icplb_tbl[i].addr);
+ bfin_write32(ICPLB_DATA0 + i * 4, icplb_tbl[i].data);
}
ctrl = bfin_read_IMEM_CONTROL();
ctrl |= IMC | ENICPLB;
@@ -47,24 +43,20 @@
#endif
#if defined(CONFIG_BFIN_DCACHE)
-void __cpuinit bfin_dcache_init(u_long dcplb[])
+void __cpuinit bfin_dcache_init(struct cplb_entry *dcplb_tbl)
{
- unsigned long *table = dcplb;
unsigned long ctrl;
int i;
+ SSYNC();
for (i = 0; i < MAX_CPLBS; i++) {
- unsigned long addr = *table++;
- unsigned long data = *table++;
- if (addr == (unsigned long)-1)
- break;
- bfin_write32(DCPLB_ADDR0 + i * 4, addr);
- bfin_write32(DCPLB_DATA0 + i * 4, data);
+ bfin_write32(DCPLB_ADDR0 + i * 4, dcplb_tbl[i].addr);
+ bfin_write32(DCPLB_DATA0 + i * 4, dcplb_tbl[i].data);
}
+
ctrl = bfin_read_DMEM_CONTROL();
ctrl |= DMEM_CNTR;
bfin_write_DMEM_CONTROL(ctrl);
-
SSYNC();
}
#endif
diff --git a/arch/blackfin/kernel/cplb-nompu/cplbhdlr.S b/arch/blackfin/kernel/cplb-nompu/cplbhdlr.S
deleted file mode 100644
index ecbabc0..0000000
--- a/arch/blackfin/kernel/cplb-nompu/cplbhdlr.S
+++ /dev/null
@@ -1,130 +0,0 @@
-/*
- * File: arch/blackfin/mach-common/cplbhdlr.S
- * Based on:
- * Author: LG Soft India
- *
- * Created: ?
- * Description: CPLB exception handler
- *
- * Modified:
- * Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <linux/linkage.h>
-#include <asm/cplb.h>
-#include <asm/entry.h>
-
-#ifdef CONFIG_EXCPT_IRQ_SYSC_L1
-.section .l1.text
-#else
-.text
-#endif
-
-.type _cplb_mgr, STT_FUNC;
-.type _panic_cplb_error, STT_FUNC;
-
-.align 2
-
-ENTRY(__cplb_hdr)
- R2 = SEQSTAT;
-
- /* Mask the contents of SEQSTAT and leave only EXCAUSE in R2 */
- R2 <<= 26;
- R2 >>= 26;
-
- R1 = 0x23; /* Data access CPLB protection violation */
- CC = R2 == R1;
- IF !CC JUMP .Lnot_data_write;
- R0 = 2; /* is a write to data space*/
- JUMP .Lis_icplb_miss;
-
-.Lnot_data_write:
- R1 = 0x2C; /* CPLB miss on an instruction fetch */
- CC = R2 == R1;
- R0 = 0; /* is_data_miss == False*/
- IF CC JUMP .Lis_icplb_miss;
-
- R1 = 0x26;
- CC = R2 == R1;
- IF !CC JUMP .Lunknown;
-
- R0 = 1; /* is_data_miss == True*/
-
-.Lis_icplb_miss:
-
-#if defined(CONFIG_BFIN_ICACHE) || defined(CONFIG_BFIN_DCACHE)
-# if defined(CONFIG_BFIN_ICACHE) && !defined(CONFIG_BFIN_DCACHE)
- R1 = CPLB_ENABLE_ICACHE;
-# endif
-# if !defined(CONFIG_BFIN_ICACHE) && defined(CONFIG_BFIN_DCACHE)
- R1 = CPLB_ENABLE_DCACHE;
-# endif
-# if defined(CONFIG_BFIN_ICACHE) && defined(CONFIG_BFIN_DCACHE)
- R1 = CPLB_ENABLE_DCACHE | CPLB_ENABLE_ICACHE;
-# endif
-#else
- R1 = 0;
-#endif
-
- [--SP] = RETS;
- CALL _cplb_mgr;
- RETS = [SP++];
- CC = R0 == 0;
- IF !CC JUMP .Lnot_replaced;
- RTS;
-
-/*
- * Diagnostic exception handlers
- */
-.Lunknown:
- R0 = CPLB_UNKNOWN_ERR;
- JUMP .Lcplb_error;
-
-.Lnot_replaced:
- CC = R0 == CPLB_NO_UNLOCKED;
- IF !CC JUMP .Lnext_check;
- R0 = CPLB_NO_UNLOCKED;
- JUMP .Lcplb_error;
-
-.Lnext_check:
- CC = R0 == CPLB_NO_ADDR_MATCH;
- IF !CC JUMP .Lnext_check2;
- R0 = CPLB_NO_ADDR_MATCH;
- JUMP .Lcplb_error;
-
-.Lnext_check2:
- CC = R0 == CPLB_PROT_VIOL;
- IF !CC JUMP .Lstrange_return_from_cplb_mgr;
- R0 = CPLB_PROT_VIOL;
- JUMP .Lcplb_error;
-
-.Lstrange_return_from_cplb_mgr:
- IDLE;
- CSYNC;
- JUMP .Lstrange_return_from_cplb_mgr;
-
-.Lcplb_error:
- R1 = sp;
- SP += -12;
- call _panic_cplb_error;
- SP += 12;
- JUMP.L _handle_bad_cplb;
-
-ENDPROC(__cplb_hdr)
diff --git a/arch/blackfin/kernel/cplb-nompu/cplbinit.c b/arch/blackfin/kernel/cplb-nompu/cplbinit.c
index 4c010ba..0e28f75 100644
--- a/arch/blackfin/kernel/cplb-nompu/cplbinit.c
+++ b/arch/blackfin/kernel/cplb-nompu/cplbinit.c
@@ -29,417 +29,143 @@
#include <asm/cplbinit.h>
#include <asm/mem_map.h>
-u_long icplb_tables[NR_CPUS][CPLB_TBL_ENTRIES+1];
-u_long dcplb_tables[NR_CPUS][CPLB_TBL_ENTRIES+1];
+struct cplb_entry icplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR;
+struct cplb_entry dcplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR;
-#ifdef CONFIG_CPLB_SWITCH_TAB_L1
-#define PDT_ATTR __attribute__((l1_data))
-#else
-#define PDT_ATTR
-#endif
+int first_switched_icplb PDT_ATTR;
+int first_switched_dcplb PDT_ATTR;
-u_long ipdt_tables[NR_CPUS][MAX_SWITCH_I_CPLBS+1] PDT_ATTR;
-u_long dpdt_tables[NR_CPUS][MAX_SWITCH_D_CPLBS+1] PDT_ATTR;
-#ifdef CONFIG_CPLB_INFO
-u_long ipdt_swapcount_tables[NR_CPUS][MAX_SWITCH_I_CPLBS] PDT_ATTR;
-u_long dpdt_swapcount_tables[NR_CPUS][MAX_SWITCH_D_CPLBS] PDT_ATTR;
-#endif
+struct cplb_boundary dcplb_bounds[9] PDT_ATTR;
+struct cplb_boundary icplb_bounds[7] PDT_ATTR;
-struct s_cplb {
- struct cplb_tab init_i;
- struct cplb_tab init_d;
- struct cplb_tab switch_i;
- struct cplb_tab switch_d;
-};
-
-#if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
-static struct cplb_desc cplb_data[] = {
- {
- .start = 0,
- .end = SIZE_1K,
- .psize = SIZE_1K,
- .attr = INITIAL_T | SWITCH_T | I_CPLB | D_CPLB,
- .i_conf = SDRAM_OOPS,
- .d_conf = SDRAM_OOPS,
-#if defined(CONFIG_DEBUG_HUNT_FOR_ZERO)
- .valid = 1,
-#else
- .valid = 0,
-#endif
- .name = "Zero Pointer Guard Page",
- },
- {
- .start = 0, /* dyanmic */
- .end = 0, /* dynamic */
- .psize = SIZE_4M,
- .attr = INITIAL_T | SWITCH_T | I_CPLB,
- .i_conf = L1_IMEMORY,
- .d_conf = 0,
- .valid = 1,
- .name = "L1 I-Memory",
- },
- {
- .start = 0, /* dynamic */
- .end = 0, /* dynamic */
- .psize = SIZE_4M,
- .attr = INITIAL_T | SWITCH_T | D_CPLB,
- .i_conf = 0,
- .d_conf = L1_DMEMORY,
-#if ((L1_DATA_A_LENGTH > 0) || (L1_DATA_B_LENGTH > 0))
- .valid = 1,
-#else
- .valid = 0,
-#endif
- .name = "L1 D-Memory",
- },
- {
- .start = L2_START,
- .end = L2_START + L2_LENGTH,
- .psize = SIZE_1M,
- .attr = L2_ATTR,
- .i_conf = L2_IMEMORY,
- .d_conf = L2_DMEMORY,
- .valid = (L2_LENGTH > 0),
- .name = "L2 Memory",
- },
- {
- .start = 0,
- .end = 0, /* dynamic */
- .psize = 0,
- .attr = INITIAL_T | SWITCH_T | I_CPLB | D_CPLB,
- .i_conf = SDRAM_IGENERIC,
- .d_conf = SDRAM_DGENERIC,
- .valid = 1,
- .name = "Kernel Memory",
- },
- {
- .start = 0, /* dynamic */
- .end = 0, /* dynamic */
- .psize = 0,
- .attr = INITIAL_T | SWITCH_T | D_CPLB,
- .i_conf = SDRAM_IGENERIC,
- .d_conf = SDRAM_DNON_CHBL,
- .valid = 1,
- .name = "uClinux MTD Memory",
- },
- {
- .start = 0, /* dynamic */
- .end = 0, /* dynamic */
- .psize = SIZE_1M,
- .attr = INITIAL_T | SWITCH_T | D_CPLB,
- .d_conf = SDRAM_DNON_CHBL,
- .valid = 1,
- .name = "Uncached DMA Zone",
- },
- {
- .start = 0, /* dynamic */
- .end = 0, /* dynamic */
- .psize = 0,
- .attr = SWITCH_T | D_CPLB,
- .i_conf = 0, /* dynamic */
- .d_conf = 0, /* dynamic */
- .valid = 1,
- .name = "Reserved Memory",
- },
- {
- .start = ASYNC_BANK0_BASE,
- .end = ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE,
- .psize = 0,
- .attr = SWITCH_T | D_CPLB,
- .d_conf = SDRAM_EBIU,
- .valid = 1,
- .name = "Asynchronous Memory Banks",
- },
- {
- .start = BOOT_ROM_START,
- .end = BOOT_ROM_START + BOOT_ROM_LENGTH,
- .psize = SIZE_1M,
- .attr = SWITCH_T | I_CPLB | D_CPLB,
- .i_conf = SDRAM_IGENERIC,
- .d_conf = SDRAM_DGENERIC,
- .valid = 1,
- .name = "On-Chip BootROM",
- },
-};
-
-static bool __init lock_kernel_check(u32 start, u32 end)
-{
- if (start >= (u32)__init_begin || end <= (u32)_stext)
- return false;
-
- /* This cplb block overlapped with kernel area. */
- return true;
-}
-
-static void __init
-fill_cplbtab(struct cplb_tab *table,
- unsigned long start, unsigned long end,
- unsigned long block_size, unsigned long cplb_data)
-{
- int i;
-
- switch (block_size) {
- case SIZE_4M:
- i = 3;
- break;
- case SIZE_1M:
- i = 2;
- break;
- case SIZE_4K:
- i = 1;
- break;
- case SIZE_1K:
- default:
- i = 0;
- break;
- }
-
- cplb_data = (cplb_data & ~(3 << 16)) | (i << 16);
-
- while ((start < end) && (table->pos < table->size)) {
-
- table->tab[table->pos++] = start;
-
- if (lock_kernel_check(start, start + block_size))
- table->tab[table->pos++] =
- cplb_data | CPLB_LOCK | CPLB_DIRTY;
- else
- table->tab[table->pos++] = cplb_data;
-
- start += block_size;
- }
-}
-
-static void __init close_cplbtab(struct cplb_tab *table)
-{
- while (table->pos < table->size)
- table->tab[table->pos++] = 0;
-}
-
-/* helper function */
-static void __init
-__fill_code_cplbtab(struct cplb_tab *t, int i, u32 a_start, u32 a_end)
-{
- if (cplb_data[i].psize) {
- fill_cplbtab(t,
- cplb_data[i].start,
- cplb_data[i].end,
- cplb_data[i].psize,
- cplb_data[i].i_conf);
- } else {
-#if defined(CONFIG_BFIN_ICACHE)
- if (ANOMALY_05000263 && i == SDRAM_KERN) {
- fill_cplbtab(t,
- cplb_data[i].start,
- cplb_data[i].end,
- SIZE_4M,
- cplb_data[i].i_conf);
- } else
-#endif
- {
- fill_cplbtab(t,
- cplb_data[i].start,
- a_start,
- SIZE_1M,
- cplb_data[i].i_conf);
- fill_cplbtab(t,
- a_start,
- a_end,
- SIZE_4M,
- cplb_data[i].i_conf);
- fill_cplbtab(t, a_end,
- cplb_data[i].end,
- SIZE_1M,
- cplb_data[i].i_conf);
- }
- }
-}
-
-static void __init
-__fill_data_cplbtab(struct cplb_tab *t, int i, u32 a_start, u32 a_end)
-{
- if (cplb_data[i].psize) {
- fill_cplbtab(t,
- cplb_data[i].start,
- cplb_data[i].end,
- cplb_data[i].psize,
- cplb_data[i].d_conf);
- } else {
- fill_cplbtab(t,
- cplb_data[i].start,
- a_start, SIZE_1M,
- cplb_data[i].d_conf);
- fill_cplbtab(t, a_start,
- a_end, SIZE_4M,
- cplb_data[i].d_conf);
- fill_cplbtab(t, a_end,
- cplb_data[i].end,
- SIZE_1M,
- cplb_data[i].d_conf);
- }
-}
+int icplb_nr_bounds PDT_ATTR;
+int dcplb_nr_bounds PDT_ATTR;
void __init generate_cplb_tables_cpu(unsigned int cpu)
{
+ int i_d, i_i;
+ unsigned long addr;
- u16 i, j, process;
- u32 a_start, a_end, as, ae, as_1m;
+ struct cplb_entry *d_tbl = dcplb_tbl[cpu];
+ struct cplb_entry *i_tbl = icplb_tbl[cpu];
- struct cplb_tab *t_i = NULL;
- struct cplb_tab *t_d = NULL;
- struct s_cplb cplb;
+ printk(KERN_INFO "NOMPU: setting up cplb tables\n");
- printk(KERN_INFO "NOMPU: setting up cplb tables for global access\n");
+ i_d = i_i = 0;
- cplb.init_i.size = CPLB_TBL_ENTRIES;
- cplb.init_d.size = CPLB_TBL_ENTRIES;
- cplb.switch_i.size = MAX_SWITCH_I_CPLBS;
- cplb.switch_d.size = MAX_SWITCH_D_CPLBS;
+ /* Set up the zero page. */
+ d_tbl[i_d].addr = 0;
+ d_tbl[i_d++].data = SDRAM_OOPS | PAGE_SIZE_1KB;
- cplb.init_i.pos = 0;
- cplb.init_d.pos = 0;
- cplb.switch_i.pos = 0;
- cplb.switch_d.pos = 0;
+ /* Cover kernel memory with 4M pages. */
+ addr = 0;
- cplb.init_i.tab = icplb_tables[cpu];
- cplb.init_d.tab = dcplb_tables[cpu];
- cplb.switch_i.tab = ipdt_tables[cpu];
- cplb.switch_d.tab = dpdt_tables[cpu];
-
- cplb_data[L1I_MEM].start = get_l1_code_start_cpu(cpu);
- cplb_data[L1I_MEM].end = cplb_data[L1I_MEM].start + L1_CODE_LENGTH;
- cplb_data[L1D_MEM].start = get_l1_data_a_start_cpu(cpu);
- cplb_data[L1D_MEM].end = get_l1_data_b_start_cpu(cpu) + L1_DATA_B_LENGTH;
- cplb_data[SDRAM_KERN].end = memory_end;
-
-#ifdef CONFIG_MTD_UCLINUX
- cplb_data[SDRAM_RAM_MTD].start = memory_mtd_start;
- cplb_data[SDRAM_RAM_MTD].end = memory_mtd_start + mtd_size;
- cplb_data[SDRAM_RAM_MTD].valid = mtd_size > 0;
-# if defined(CONFIG_ROMFS_FS)
- cplb_data[SDRAM_RAM_MTD].attr |= I_CPLB;
-
- /*
- * The ROMFS_FS size is often not multiple of 1MB.
- * This can cause multiple CPLB sets covering the same memory area.
- * This will then cause multiple CPLB hit exceptions.
- * Workaround: We ensure a contiguous memory area by extending the kernel
- * memory section over the mtd section.
- * For ROMFS_FS memory must be covered with ICPLBs anyways.
- * So there is no difference between kernel and mtd memory setup.
- */
-
- cplb_data[SDRAM_KERN].end = memory_mtd_start + mtd_size;;
- cplb_data[SDRAM_RAM_MTD].valid = 0;
-
-# endif
-#else
- cplb_data[SDRAM_RAM_MTD].valid = 0;
-#endif
-
- cplb_data[SDRAM_DMAZ].start = _ramend - DMA_UNCACHED_REGION;
- cplb_data[SDRAM_DMAZ].end = _ramend;
-
- cplb_data[RES_MEM].start = _ramend;
- cplb_data[RES_MEM].end = physical_mem_end;
-
- if (reserved_mem_dcache_on)
- cplb_data[RES_MEM].d_conf = SDRAM_DGENERIC;
- else
- cplb_data[RES_MEM].d_conf = SDRAM_DNON_CHBL;
-
- if (reserved_mem_icache_on)
- cplb_data[RES_MEM].i_conf = SDRAM_IGENERIC;
- else
- cplb_data[RES_MEM].i_conf = SDRAM_INON_CHBL;
-
- for (i = ZERO_P; i < ARRAY_SIZE(cplb_data); ++i) {
- if (!cplb_data[i].valid)
- continue;
-
- as_1m = cplb_data[i].start % SIZE_1M;
-
- /* We need to make sure all sections are properly 1M aligned
- * However between Kernel Memory and the Kernel mtd section, depending on the
- * rootfs size, there can be overlapping memory areas.
- */
-
- if (as_1m && i != L1I_MEM && i != L1D_MEM) {
-#ifdef CONFIG_MTD_UCLINUX
- if (i == SDRAM_RAM_MTD) {
- if ((cplb_data[SDRAM_KERN].end + 1) > cplb_data[SDRAM_RAM_MTD].start)
- cplb_data[SDRAM_RAM_MTD].start = (cplb_data[i].start & (-2*SIZE_1M)) + SIZE_1M;
- else
- cplb_data[SDRAM_RAM_MTD].start = (cplb_data[i].start & (-2*SIZE_1M));
- } else
-#endif
- printk(KERN_WARNING "Unaligned Start of %s at 0x%X\n",
- cplb_data[i].name, cplb_data[i].start);
- }
-
- as = cplb_data[i].start % SIZE_4M;
- ae = cplb_data[i].end % SIZE_4M;
-
- if (as)
- a_start = cplb_data[i].start + (SIZE_4M - (as));
- else
- a_start = cplb_data[i].start;
-
- a_end = cplb_data[i].end - ae;
-
- for (j = INITIAL_T; j <= SWITCH_T; j++) {
-
- switch (j) {
- case INITIAL_T:
- if (cplb_data[i].attr & INITIAL_T) {
- t_i = &cplb.init_i;
- t_d = &cplb.init_d;
- process = 1;
- } else
- process = 0;
- break;
- case SWITCH_T:
- if (cplb_data[i].attr & SWITCH_T) {
- t_i = &cplb.switch_i;
- t_d = &cplb.switch_d;
- process = 1;
- } else
- process = 0;
- break;
- default:
- process = 0;
- break;
- }
-
- if (!process)
- continue;
- if (cplb_data[i].attr & I_CPLB)
- __fill_code_cplbtab(t_i, i, a_start, a_end);
-
- if (cplb_data[i].attr & D_CPLB)
- __fill_data_cplbtab(t_d, i, a_start, a_end);
- }
+ for (; addr < memory_start; addr += 4 * 1024 * 1024) {
+ d_tbl[i_d].addr = addr;
+ d_tbl[i_d++].data = SDRAM_DGENERIC | PAGE_SIZE_4MB;
+ i_tbl[i_i].addr = addr;
+ i_tbl[i_i++].data = SDRAM_IGENERIC | PAGE_SIZE_4MB;
}
- /* make sure we locked the kernel start */
- BUG_ON(cplb.init_i.pos < 2 + cplb_data[ZERO_P].valid);
- BUG_ON(cplb.init_d.pos < 1 + cplb_data[ZERO_P].valid + cplb_data[L1D_MEM].valid);
+ /* Cover L1 memory. One 4M area for code and data each is enough. */
+ if (L1_DATA_A_LENGTH || L1_DATA_B_LENGTH) {
+ d_tbl[i_d].addr = L1_DATA_A_START;
+ d_tbl[i_d++].data = L1_DMEMORY | PAGE_SIZE_4MB;
+ }
+ i_tbl[i_i].addr = L1_CODE_START;
+ i_tbl[i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB;
- /* make sure we didnt overflow the table */
- BUG_ON(cplb.init_i.size < cplb.init_i.pos);
- BUG_ON(cplb.init_d.size < cplb.init_d.pos);
- BUG_ON(cplb.switch_i.size < cplb.switch_i.pos);
- BUG_ON(cplb.switch_d.size < cplb.switch_d.pos);
+ first_switched_dcplb = i_d;
+ first_switched_icplb = i_i;
- /* close tables */
- close_cplbtab(&cplb.init_i);
- close_cplbtab(&cplb.init_d);
+ BUG_ON(first_switched_dcplb > MAX_CPLBS);
+ BUG_ON(first_switched_icplb > MAX_CPLBS);
- cplb.init_i.tab[cplb.init_i.pos] = -1;
- cplb.init_d.tab[cplb.init_d.pos] = -1;
- cplb.switch_i.tab[cplb.switch_i.pos] = -1;
- cplb.switch_d.tab[cplb.switch_d.pos] = -1;
-
+ while (i_d < MAX_CPLBS)
+ d_tbl[i_d++].data = 0;
+ while (i_i < MAX_CPLBS)
+ i_tbl[i_i++].data = 0;
}
+void __init generate_cplb_tables_all(void)
+{
+ int i_d, i_i;
+
+ i_d = 0;
+ /* Normal RAM, including MTD FS. */
+#ifdef CONFIG_MTD_UCLINUX
+ dcplb_bounds[i_d].eaddr = memory_mtd_start + mtd_size;
+#else
+ dcplb_bounds[i_d].eaddr = memory_end;
#endif
+ dcplb_bounds[i_d++].data = SDRAM_DGENERIC;
+ /* DMA uncached region. */
+ if (DMA_UNCACHED_REGION) {
+ dcplb_bounds[i_d].eaddr = _ramend;
+ dcplb_bounds[i_d++].data = SDRAM_DNON_CHBL;
+ }
+ if (_ramend != physical_mem_end) {
+ /* Reserved memory. */
+ dcplb_bounds[i_d].eaddr = physical_mem_end;
+ dcplb_bounds[i_d++].data = (reserved_mem_dcache_on ?
+ SDRAM_DGENERIC : SDRAM_DNON_CHBL);
+ }
+ /* Addressing hole up to the async bank. */
+ dcplb_bounds[i_d].eaddr = ASYNC_BANK0_BASE;
+ dcplb_bounds[i_d++].data = 0;
+ /* ASYNC banks. */
+ dcplb_bounds[i_d].eaddr = ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE;
+ dcplb_bounds[i_d++].data = SDRAM_EBIU;
+ /* Addressing hole up to BootROM. */
+ dcplb_bounds[i_d].eaddr = BOOT_ROM_START;
+ dcplb_bounds[i_d++].data = 0;
+ /* BootROM -- largest one should be less than 1 meg. */
+ dcplb_bounds[i_d].eaddr = BOOT_ROM_START + (1 * 1024 * 1024);
+ dcplb_bounds[i_d++].data = SDRAM_DGENERIC;
+ if (L2_LENGTH) {
+ /* Addressing hole up to L2 SRAM. */
+ dcplb_bounds[i_d].eaddr = L2_START;
+ dcplb_bounds[i_d++].data = 0;
+ /* L2 SRAM. */
+ dcplb_bounds[i_d].eaddr = L2_START + L2_LENGTH;
+ dcplb_bounds[i_d++].data = L2_DMEMORY;
+ }
+ dcplb_nr_bounds = i_d;
+ BUG_ON(dcplb_nr_bounds > ARRAY_SIZE(dcplb_bounds));
+
+ i_i = 0;
+ /* Normal RAM, including MTD FS. */
+#ifdef CONFIG_MTD_UCLINUX
+ icplb_bounds[i_i].eaddr = memory_mtd_start + mtd_size;
+#else
+ icplb_bounds[i_i].eaddr = memory_end;
+#endif
+ icplb_bounds[i_i++].data = SDRAM_IGENERIC;
+ /* DMA uncached region. */
+ if (DMA_UNCACHED_REGION) {
+ icplb_bounds[i_i].eaddr = _ramend;
+ icplb_bounds[i_i++].data = 0;
+ }
+ if (_ramend != physical_mem_end) {
+ /* Reserved memory. */
+ icplb_bounds[i_i].eaddr = physical_mem_end;
+ icplb_bounds[i_i++].data = (reserved_mem_icache_on ?
+ SDRAM_IGENERIC : SDRAM_INON_CHBL);
+ }
+ /* Addressing hole up to BootROM. */
+ icplb_bounds[i_i].eaddr = BOOT_ROM_START;
+ icplb_bounds[i_i++].data = 0;
+ /* BootROM -- largest one should be less than 1 meg. */
+ icplb_bounds[i_i].eaddr = BOOT_ROM_START + (1 * 1024 * 1024);
+ icplb_bounds[i_i++].data = SDRAM_IGENERIC;
+ if (L2_LENGTH) {
+ /* Addressing hole up to L2 SRAM, including the async bank. */
+ icplb_bounds[i_i].eaddr = L2_START;
+ icplb_bounds[i_i++].data = 0;
+ /* L2 SRAM. */
+ icplb_bounds[i_i].eaddr = L2_START + L2_LENGTH;
+ icplb_bounds[i_i++].data = L2_IMEMORY;
+ }
+ icplb_nr_bounds = i_i;
+ BUG_ON(icplb_nr_bounds > ARRAY_SIZE(icplb_bounds));
+}
diff --git a/arch/blackfin/kernel/cplb-nompu/cplbmgr.S b/arch/blackfin/kernel/cplb-nompu/cplbmgr.S
deleted file mode 100644
index f4ca76c..0000000
--- a/arch/blackfin/kernel/cplb-nompu/cplbmgr.S
+++ /dev/null
@@ -1,648 +0,0 @@
-/*
- * File: arch/blackfin/mach-common/cplbmgtr.S
- * Based on:
- * Author: LG Soft India
- *
- * Created: ?
- * Description: CPLB replacement routine for CPLB mismatch
- *
- * Modified:
- * Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/* Usage: int _cplb_mgr(is_data_miss,int enable_cache)
- * is_data_miss==2 => Mark as Dirty, write to the clean data page
- * is_data_miss==1 => Replace a data CPLB.
- * is_data_miss==0 => Replace an instruction CPLB.
- *
- * Returns:
- * CPLB_RELOADED => Successfully updated CPLB table.
- * CPLB_NO_UNLOCKED => All CPLBs are locked, so cannot be evicted.
- * This indicates that the CPLBs in the configuration
- * tablei are badly configured, as this should never
- * occur.
- * CPLB_NO_ADDR_MATCH => The address being accessed, that triggered the
- * exception, is not covered by any of the CPLBs in
- * the configuration table. The application is
- * presumably misbehaving.
- * CPLB_PROT_VIOL => The address being accessed, that triggered the
- * exception, was not a first-write to a clean Write
- * Back Data page, and so presumably is a genuine
- * violation of the page's protection attributes.
- * The application is misbehaving.
- */
-
-#include <linux/linkage.h>
-#include <asm/blackfin.h>
-#include <asm/cplb.h>
-#include <asm/asm-offsets.h>
-
-#ifdef CONFIG_EXCPT_IRQ_SYSC_L1
-.section .l1.text
-#else
-.text
-#endif
-
-.align 2;
-ENTRY(_cplb_mgr)
-
- [--SP]=( R7:4,P5:3 );
-
- CC = R0 == 2;
- IF CC JUMP .Ldcplb_write;
-
- CC = R0 == 0;
- IF !CC JUMP .Ldcplb_miss_compare;
-
- /* ICPLB Miss Exception. We need to choose one of the
- * currently-installed CPLBs, and replace it with one
- * from the configuration table.
- */
-
- /* A multi-word instruction can cross a page boundary. This means the
- * first part of the instruction can be in a valid page, but the
- * second part is not, and hence generates the instruction miss.
- * However, the fault address is for the start of the instruction,
- * not the part that's in the bad page. Therefore, we have to check
- * whether the fault address applies to a page that is already present
- * in the table.
- */
-
- P4.L = LO(ICPLB_FAULT_ADDR);
- P4.H = HI(ICPLB_FAULT_ADDR);
-
- P1 = 16;
- P5.L = _page_size_table;
- P5.H = _page_size_table;
-
- P0.L = LO(ICPLB_DATA0);
- P0.H = HI(ICPLB_DATA0);
- R4 = [P4]; /* Get faulting address*/
- R6 = 64; /* Advance past the fault address, which*/
- R6 = R6 + R4; /* we'll use if we find a match*/
- R3 = ((16 << 8) | 2); /* Extract mask, two bits at posn 16 */
-
- R5 = 0;
-.Lisearch:
-
- R1 = [P0-0x100]; /* Address for this CPLB */
-
- R0 = [P0++]; /* Info for this CPLB*/
- CC = BITTST(R0,0); /* Is the CPLB valid?*/
- IF !CC JUMP .Lnomatch; /* Skip it, if not.*/
- CC = R4 < R1(IU); /* If fault address less than page start*/
- IF CC JUMP .Lnomatch; /* then skip this one.*/
- R2 = EXTRACT(R0,R3.L) (Z); /* Get page size*/
- P1 = R2;
- P1 = P5 + (P1<<2); /* index into page-size table*/
- R2 = [P1]; /* Get the page size*/
- R1 = R1 + R2; /* and add to page start, to get page end*/
- CC = R4 < R1(IU); /* and see whether fault addr is in page.*/
- IF !CC R4 = R6; /* If so, advance the address and finish loop.*/
- IF !CC JUMP .Lisearch_done;
-.Lnomatch:
- /* Go around again*/
- R5 += 1;
- CC = BITTST(R5, 4); /* i.e CC = R5 >= 16*/
- IF !CC JUMP .Lisearch;
-
-.Lisearch_done:
- I0 = R4; /* Fault address we'll search for*/
-
- /* set up pointers */
- P0.L = LO(ICPLB_DATA0);
- P0.H = HI(ICPLB_DATA0);
-
- /* The replacement procedure for ICPLBs */
-
- P4.L = LO(IMEM_CONTROL);
- P4.H = HI(IMEM_CONTROL);
-
- /* Turn off CPLBs while we work, necessary according to HRM before
- * modifying CPLB descriptors
- */
- R5 = [P4]; /* Control Register*/
- BITCLR(R5,ENICPLB_P);
- CLI R1;
- SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */
- .align 8;
- [P4] = R5;
- SSYNC;
- STI R1;
-
- R1 = -1; /* end point comparison */
- R3 = 16; /* counter */
-
- /* Search through CPLBs for first non-locked entry */
- /* Overwrite it by moving everyone else up by 1 */
-.Licheck_lock:
- R0 = [P0++];
- R3 = R3 + R1;
- CC = R3 == R1;
- IF CC JUMP .Lall_locked;
- CC = BITTST(R0, 0); /* an invalid entry is good */
- IF !CC JUMP .Lifound_victim;
- CC = BITTST(R0,1); /* but a locked entry isn't */
- IF CC JUMP .Licheck_lock;
-
-.Lifound_victim:
-#ifdef CONFIG_CPLB_INFO
- R7 = [P0 - 0x104];
- GET_PDA(P2, R2);
- P3 = [P2 + PDA_IPDT_SWAPCOUNT];
- P2 = [P2 + PDA_IPDT];
- P3 += -4;
-.Licount:
- R2 = [P2]; /* address from config table */
- P2 += 8;
- P3 += 8;
- CC = R2==-1;
- IF CC JUMP .Licount_done;
- CC = R7==R2;
- IF !CC JUMP .Licount;
- R7 = [P3];
- R7 += 1;
- [P3] = R7;
- CSYNC;
-.Licount_done:
-#endif
- LC0=R3;
- LSETUP(.Lis_move,.Lie_move) LC0;
-.Lis_move:
- R0 = [P0];
- [P0 - 4] = R0;
- R0 = [P0 - 0x100];
- [P0-0x104] = R0;
-.Lie_move:
- P0+=4;
-
- /* Clear ICPLB_DATA15, in case we don't find a replacement
- * otherwise, we would have a duplicate entry, and will crash
- */
- R0 = 0;
- [P0 - 4] = R0;
-
- /* We've made space in the ICPLB table, so that ICPLB15
- * is now free to be overwritten. Next, we have to determine
- * which CPLB we need to install, from the configuration
- * table. This is a matter of getting the start-of-page
- * addresses and page-lengths from the config table, and
- * determining whether the fault address falls within that
- * range.
- */
-
- GET_PDA(P3, R0);
- P2 = [P3 + PDA_IPDT];
-#ifdef CONFIG_CPLB_INFO
- P3 = [P3 + PDA_IPDT_SWAPCOUNT];
- P3 += -8;
-#endif
- P0.L = _page_size_table;
- P0.H = _page_size_table;
-
- /* Retrieve our fault address (which may have been advanced
- * because the faulting instruction crossed a page boundary).
- */
-
- R0 = I0;
-
- /* An extraction pattern, to get the page-size bits from
- * the CPLB data entry. Bits 16-17, so two bits at posn 16.
- */
-
- R1 = ((16<<8)|2);
-.Linext: R4 = [P2++]; /* address from config table */
- R2 = [P2++]; /* data from config table */
-#ifdef CONFIG_CPLB_INFO
- P3 += 8;
-#endif
-
- CC = R4 == -1; /* End of config table*/
- IF CC JUMP .Lno_page_in_table;
-
- /* See if failed address > start address */
- CC = R4 <= R0(IU);
- IF !CC JUMP .Linext;
-
- /* extract page size (17:16)*/
- R3 = EXTRACT(R2, R1.L) (Z);
-
- /* add page size to addr to get range */
-
- P5 = R3;
- P5 = P0 + (P5 << 2); /* scaled, for int access*/
- R3 = [P5];
- R3 = R3 + R4;
-
- /* See if failed address < (start address + page size) */
- CC = R0 < R3(IU);
- IF !CC JUMP .Linext;
-
- /* We've found a CPLB in the config table that covers
- * the faulting address, so install this CPLB into the
- * last entry of the table.
- */
-
- P1.L = LO(ICPLB_DATA15); /* ICPLB_DATA15 */
- P1.H = HI(ICPLB_DATA15);
- [P1] = R2;
- [P1-0x100] = R4;
-#ifdef CONFIG_CPLB_INFO
- R3 = [P3];
- R3 += 1;
- [P3] = R3;
-#endif
-
- /* P4 points to IMEM_CONTROL, and R5 contains its old
- * value, after we disabled ICPLBS. Re-enable them.
- */
-
- BITSET(R5,ENICPLB_P);
- CLI R2;
- SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */
- .align 8;
- [P4] = R5;
- SSYNC;
- STI R2;
-
- ( R7:4,P5:3 ) = [SP++];
- R0 = CPLB_RELOADED;
- RTS;
-
-/* FAILED CASES*/
-.Lno_page_in_table:
- R0 = CPLB_NO_ADDR_MATCH;
- JUMP .Lfail_ret;
-
-.Lall_locked:
- R0 = CPLB_NO_UNLOCKED;
- JUMP .Lfail_ret;
-
-.Lprot_violation:
- R0 = CPLB_PROT_VIOL;
-
-.Lfail_ret:
- /* Make sure we turn protection/cache back on, even in the failing case */
- BITSET(R5,ENICPLB_P);
- CLI R2;
- SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */
- .align 8;
- [P4] = R5;
- SSYNC;
- STI R2;
-
- ( R7:4,P5:3 ) = [SP++];
- RTS;
-
-.Ldcplb_write:
-
- /* if a DCPLB is marked as write-back (CPLB_WT==0), and
- * it is clean (CPLB_DIRTY==0), then a write to the
- * CPLB's page triggers a protection violation. We have to
- * mark the CPLB as dirty, to indicate that there are
- * pending writes associated with the CPLB.
- */
-
- P4.L = LO(DCPLB_STATUS);
- P4.H = HI(DCPLB_STATUS);
- P3.L = LO(DCPLB_DATA0);
- P3.H = HI(DCPLB_DATA0);
- R5 = [P4];
-
- /* A protection violation can be caused by more than just writes
- * to a clean WB page, so we have to ensure that:
- * - It's a write
- * - to a clean WB page
- * - and is allowed in the mode the access occurred.
- */
-
- CC = BITTST(R5, 16); /* ensure it was a write*/
- IF !CC JUMP .Lprot_violation;
-
- /* to check the rest, we have to retrieve the DCPLB.*/
-
- /* The low half of DCPLB_STATUS is a bit mask*/
-
- R2 = R5.L (Z); /* indicating which CPLB triggered the event.*/
- R3 = 30; /* so we can use this to determine the offset*/
- R2.L = SIGNBITS R2;
- R2 = R2.L (Z); /* into the DCPLB table.*/
- R3 = R3 - R2;
- P4 = R3;
- P3 = P3 + (P4<<2);
- R3 = [P3]; /* Retrieve the CPLB*/
-
- /* Now we can check whether it's a clean WB page*/
-
- CC = BITTST(R3, 14); /* 0==WB, 1==WT*/
- IF CC JUMP .Lprot_violation;
- CC = BITTST(R3, 7); /* 0 == clean, 1 == dirty*/
- IF CC JUMP .Lprot_violation;
-
- /* Check whether the write is allowed in the mode that was active.*/
-
- R2 = 1<<3; /* checking write in user mode*/
- CC = BITTST(R5, 17); /* 0==was user, 1==was super*/
- R5 = CC;
- R2 <<= R5; /* if was super, check write in super mode*/
- R2 = R3 & R2;
- CC = R2 == 0;
- IF CC JUMP .Lprot_violation;
-
- /* It's a genuine write-to-clean-page.*/
-
- BITSET(R3, 7); /* mark as dirty*/
- [P3] = R3; /* and write back.*/
- NOP;
- CSYNC;
- ( R7:4,P5:3 ) = [SP++];
- R0 = CPLB_RELOADED;
- RTS;
-
-.Ldcplb_miss_compare:
-
- /* Data CPLB Miss event. We need to choose a CPLB to
- * evict, and then locate a new CPLB to install from the
- * config table, that covers the faulting address.
- */
-
- P1.L = LO(DCPLB_DATA15);
- P1.H = HI(DCPLB_DATA15);
-
- P4.L = LO(DCPLB_FAULT_ADDR);
- P4.H = HI(DCPLB_FAULT_ADDR);
- R4 = [P4];
- I0 = R4;
-
- /* The replacement procedure for DCPLBs*/
-
- R6 = R1; /* Save for later*/
-
- /* Turn off CPLBs while we work.*/
- P4.L = LO(DMEM_CONTROL);
- P4.H = HI(DMEM_CONTROL);
- R5 = [P4];
- BITCLR(R5,ENDCPLB_P);
- CLI R0;
- SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */
- .align 8;
- [P4] = R5;
- SSYNC;
- STI R0;
-
- /* Start looking for a CPLB to evict. Our order of preference
- * is: invalid CPLBs, clean CPLBs, dirty CPLBs. Locked CPLBs
- * are no good.
- */
-
- I1.L = LO(DCPLB_DATA0);
- I1.H = HI(DCPLB_DATA0);
- P1 = 2;
- P2 = 16;
- I2.L = _dcplb_preference;
- I2.H = _dcplb_preference;
- LSETUP(.Lsdsearch1, .Ledsearch1) LC0 = P1;
-.Lsdsearch1:
- R0 = [I2++]; /* Get the bits we're interested in*/
- P0 = I1; /* Go back to start of table*/
- LSETUP (.Lsdsearch2, .Ledsearch2) LC1 = P2;
-.Lsdsearch2:
- R1 = [P0++]; /* Fetch each installed CPLB in turn*/
- R2 = R1 & R0; /* and test for interesting bits.*/
- CC = R2 == 0; /* If none are set, it'll do.*/
- IF !CC JUMP .Lskip_stack_check;
-
- R2 = [P0 - 0x104]; /* R2 - PageStart */
- P3.L = _page_size_table; /* retrieve end address */
- P3.H = _page_size_table; /* retrieve end address */
- R3 = 0x1002; /* 16th - position, 2 bits -length */
-#if ANOMALY_05000209
- nop; /* Anomaly 05000209 */
-#endif
- R7 = EXTRACT(R1,R3.l);
- R7 = R7 << 2; /* Page size index offset */
- P5 = R7;
- P3 = P3 + P5;
- R7 = [P3]; /* page size in bytes */
-
- R7 = R2 + R7; /* R7 - PageEnd */
- R4 = SP; /* Test SP is in range */
-
- CC = R7 < R4; /* if PageEnd < SP */
- IF CC JUMP .Ldfound_victim;
- R3 = 0x284; /* stack length from start of trap till
- * the point.
- * 20 stack locations for future modifications
- */
- R4 = R4 + R3;
- CC = R4 < R2; /* if SP + stacklen < PageStart */
- IF CC JUMP .Ldfound_victim;
-.Lskip_stack_check:
-
-.Ledsearch2: NOP;
-.Ledsearch1: NOP;
-
- /* If we got here, we didn't find a DCPLB we considered
- * replacable, which means all of them were locked.
- */
-
- JUMP .Lall_locked;
-.Ldfound_victim:
-
-#ifdef CONFIG_CPLB_INFO
- R7 = [P0 - 0x104];
- GET_PDA(P2, R2);
- P3 = [P2 + PDA_DPDT_SWAPCOUNT];
- P2 = [P2 + PDA_DPDT];
- P3 += -4;
-.Ldicount:
- R2 = [P2];
- P2 += 8;
- P3 += 8;
- CC = R2==-1;
- IF CC JUMP .Ldicount_done;
- CC = R7==R2;
- IF !CC JUMP .Ldicount;
- R7 = [P3];
- R7 += 1;
- [P3] = R7;
-.Ldicount_done:
-#endif
-
- /* Clean down the hardware loops*/
- R2 = 0;
- LC1 = R2;
- LC0 = R2;
-
- /* There's a suitable victim in [P0-4] (because we've
- * advanced already).
- */
-
-.LDdoverwrite:
-
- /* [P0-4] is a suitable victim CPLB, so we want to
- * overwrite it by moving all the following CPLBs
- * one space closer to the start.
- */
-
- R1.L = LO(DCPLB_DATA16); /* DCPLB_DATA15 + 4 */
- R1.H = HI(DCPLB_DATA16);
- R0 = P0;
-
- /* If the victim happens to be in DCPLB15,
- * we don't need to move anything.
- */
-
- CC = R1 == R0;
- IF CC JUMP .Lde_moved;
- R1 = R1 - R0;
- R1 >>= 2;
- P1 = R1;
- LSETUP(.Lds_move, .Lde_move) LC0=P1;
-.Lds_move:
- R0 = [P0++]; /* move data */
- [P0 - 8] = R0;
- R0 = [P0-0x104] /* move address */
-.Lde_move:
- [P0-0x108] = R0;
-
-.Lde_moved:
- NOP;
-
- /* Clear DCPLB_DATA15, in case we don't find a replacement
- * otherwise, we would have a duplicate entry, and will crash
- */
- R0 = 0;
- [P0 - 0x4] = R0;
-
- /* We've now made space in DCPLB15 for the new CPLB to be
- * installed. The next stage is to locate a CPLB in the
- * config table that covers the faulting address.
- */
-
- R0 = I0; /* Our faulting address */
-
- GET_PDA(P3, R1);
- P2 = [P3 + PDA_DPDT];
-#ifdef CONFIG_CPLB_INFO
- P3 = [P3 + PDA_DPDT_SWAPCOUNT];
- P3 += -8;
-#endif
-
- P1.L = _page_size_table;
- P1.H = _page_size_table;
-
- /* An extraction pattern, to retrieve bits 17:16.*/
-
- R1 = (16<<8)|2;
-.Ldnext: R4 = [P2++]; /* address */
- R2 = [P2++]; /* data */
-#ifdef CONFIG_CPLB_INFO
- P3 += 8;
-#endif
-
- CC = R4 == -1;
- IF CC JUMP .Lno_page_in_table;
-
- /* See if failed address > start address */
- CC = R4 <= R0(IU);
- IF !CC JUMP .Ldnext;
-
- /* extract page size (17:16)*/
- R3 = EXTRACT(R2, R1.L) (Z);
-
- /* add page size to addr to get range */
-
- P5 = R3;
- P5 = P1 + (P5 << 2);
- R3 = [P5];
- R3 = R3 + R4;
-
- /* See if failed address < (start address + page size) */
- CC = R0 < R3(IU);
- IF !CC JUMP .Ldnext;
-
- /* We've found the CPLB that should be installed, so
- * write it into CPLB15, masking off any caching bits
- * if necessary.
- */
-
- P1.L = LO(DCPLB_DATA15);
- P1.H = HI(DCPLB_DATA15);
-
- /* If the DCPLB has cache bits set, but caching hasn't
- * been enabled, then we want to mask off the cache-in-L1
- * bit before installing. Moreover, if caching is off, we
- * also want to ensure that the DCPLB has WT mode set, rather
- * than WB, since WB pages still trigger first-write exceptions
- * even when not caching is off, and the page isn't marked as
- * cachable. Finally, we could mark the page as clean, not dirty,
- * but we choose to leave that decision to the user; if the user
- * chooses to have a CPLB pre-defined as dirty, then they always
- * pay the cost of flushing during eviction, but don't pay the
- * cost of first-write exceptions to mark the page as dirty.
- */
-
-#ifdef CONFIG_BFIN_WT
- BITSET(R6, 14); /* Set WT*/
-#endif
-
- [P1] = R2;
- [P1-0x100] = R4;
-#ifdef CONFIG_CPLB_INFO
- R3 = [P3];
- R3 += 1;
- [P3] = R3;
-#endif
-
- /* We've installed the CPLB, so re-enable CPLBs. P4
- * points to DMEM_CONTROL, and R5 is the value we
- * last wrote to it, when we were disabling CPLBs.
- */
-
- BITSET(R5,ENDCPLB_P);
- CLI R2;
- .align 8;
- [P4] = R5;
- SSYNC;
- STI R2;
-
- ( R7:4,P5:3 ) = [SP++];
- R0 = CPLB_RELOADED;
- RTS;
-ENDPROC(_cplb_mgr)
-
-#ifdef CONFIG_CPLB_SWITCH_TAB_L1
-.section .l1.data
-#else
-.data
-#endif
-
-ENTRY(_page_size_table)
-.byte4 0x00000400; /* 1K */
-.byte4 0x00001000; /* 4K */
-.byte4 0x00100000; /* 1M */
-.byte4 0x00400000; /* 4M */
-END(_page_size_table)
-
-ENTRY(_dcplb_preference)
-.byte4 0x00000001; /* valid bit */
-.byte4 0x00000002; /* lock bit */
-END(_dcplb_preference)
diff --git a/arch/blackfin/kernel/cplb-nompu/cplbmgr.c b/arch/blackfin/kernel/cplb-nompu/cplbmgr.c
new file mode 100644
index 0000000..376249a
--- /dev/null
+++ b/arch/blackfin/kernel/cplb-nompu/cplbmgr.c
@@ -0,0 +1,283 @@
+/*
+ * File: arch/blackfin/kernel/cplb-nompu-c/cplbmgr.c
+ * Based on: arch/blackfin/kernel/cplb-mpu/cplbmgr.c
+ * Author: Michael McTernan <mmcternan@airvana.com>
+ *
+ * Created: 01Nov2008
+ * Description: CPLB miss handler.
+ *
+ * Modified:
+ * Copyright 2008 Airvana Inc.
+ * Copyright 2004-2007 Analog Devices Inc.
+ *
+ * Bugs: Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <asm/blackfin.h>
+#include <asm/cplbinit.h>
+#include <asm/cplb.h>
+#include <asm/mmu_context.h>
+
+/*
+ * WARNING
+ *
+ * This file is compiled with certain -ffixed-reg options. We have to
+ * make sure not to call any functions here that could clobber these
+ * registers.
+ */
+
+int nr_dcplb_miss[NR_CPUS], nr_icplb_miss[NR_CPUS];
+int nr_dcplb_supv_miss[NR_CPUS], nr_icplb_supv_miss[NR_CPUS];
+int nr_cplb_flush[NR_CPUS], nr_dcplb_prot[NR_CPUS];
+
+#ifdef CONFIG_EXCPT_IRQ_SYSC_L1
+#define MGR_ATTR __attribute__((l1_text))
+#else
+#define MGR_ATTR
+#endif
+
+/*
+ * We're in an exception handler. The normal cli nop nop workaround
+ * isn't going to do very much, as the only thing that can interrupt
+ * us is an NMI, and the cli isn't going to stop that.
+ */
+#define NOWA_SSYNC __asm__ __volatile__ ("ssync;")
+
+/* Anomaly handlers provide SSYNCs, so avoid extra if anomaly is present */
+#if ANOMALY_05000125
+
+#define bfin_write_DMEM_CONTROL_SSYNC(v) bfin_write_DMEM_CONTROL(v)
+#define bfin_write_IMEM_CONTROL_SSYNC(v) bfin_write_IMEM_CONTROL(v)
+
+#else
+
+#define bfin_write_DMEM_CONTROL_SSYNC(v) \
+ do { NOWA_SSYNC; bfin_write_DMEM_CONTROL(v); NOWA_SSYNC; } while (0)
+#define bfin_write_IMEM_CONTROL_SSYNC(v) \
+ do { NOWA_SSYNC; bfin_write_IMEM_CONTROL(v); NOWA_SSYNC; } while (0)
+
+#endif
+
+static inline void write_dcplb_data(int cpu, int idx, unsigned long data,
+ unsigned long addr)
+{
+ unsigned long ctrl = bfin_read_DMEM_CONTROL();
+ bfin_write_DMEM_CONTROL_SSYNC(ctrl & ~ENDCPLB);
+ bfin_write32(DCPLB_DATA0 + idx * 4, data);
+ bfin_write32(DCPLB_ADDR0 + idx * 4, addr);
+ bfin_write_DMEM_CONTROL_SSYNC(ctrl);
+
+#ifdef CONFIG_CPLB_INFO
+ dcplb_tbl[cpu][idx].addr = addr;
+ dcplb_tbl[cpu][idx].data = data;
+#endif
+}
+
+static inline void write_icplb_data(int cpu, int idx, unsigned long data,
+ unsigned long addr)
+{
+ unsigned long ctrl = bfin_read_IMEM_CONTROL();
+
+ bfin_write_IMEM_CONTROL_SSYNC(ctrl & ~ENICPLB);
+ bfin_write32(ICPLB_DATA0 + idx * 4, data);
+ bfin_write32(ICPLB_ADDR0 + idx * 4, addr);
+ bfin_write_IMEM_CONTROL_SSYNC(ctrl);
+
+#ifdef CONFIG_CPLB_INFO
+ icplb_tbl[cpu][idx].addr = addr;
+ icplb_tbl[cpu][idx].data = data;
+#endif
+}
+
+/*
+ * Given the contents of the status register, return the index of the
+ * CPLB that caused the fault.
+ */
+static inline int faulting_cplb_index(int status)
+{
+ int signbits = __builtin_bfin_norm_fr1x32(status & 0xFFFF);
+ return 30 - signbits;
+}
+
+/*
+ * Given the contents of the status register and the DCPLB_DATA contents,
+ * return true if a write access should be permitted.
+ */
+static inline int write_permitted(int status, unsigned long data)
+{
+ if (status & FAULT_USERSUPV)
+ return !!(data & CPLB_SUPV_WR);
+ else
+ return !!(data & CPLB_USER_WR);
+}
+
+/* Counters to implement round-robin replacement. */
+static int icplb_rr_index[NR_CPUS] PDT_ATTR;
+static int dcplb_rr_index[NR_CPUS] PDT_ATTR;
+
+/*
+ * Find an ICPLB entry to be evicted and return its index.
+ */
+static int evict_one_icplb(int cpu)
+{
+ int i = first_switched_icplb + icplb_rr_index[cpu];
+ if (i >= MAX_CPLBS) {
+ i -= MAX_CPLBS - first_switched_icplb;
+ icplb_rr_index[cpu] -= MAX_CPLBS - first_switched_icplb;
+ }
+ icplb_rr_index[cpu]++;
+ return i;
+}
+
+static int evict_one_dcplb(int cpu)
+{
+ int i = first_switched_dcplb + dcplb_rr_index[cpu];
+ if (i >= MAX_CPLBS) {
+ i -= MAX_CPLBS - first_switched_dcplb;
+ dcplb_rr_index[cpu] -= MAX_CPLBS - first_switched_dcplb;
+ }
+ dcplb_rr_index[cpu]++;
+ return i;
+}
+
+MGR_ATTR static int icplb_miss(int cpu)
+{
+ unsigned long addr = bfin_read_ICPLB_FAULT_ADDR();
+ int status = bfin_read_ICPLB_STATUS();
+ int idx;
+ unsigned long i_data, base, addr1, eaddr;
+
+ nr_icplb_miss[cpu]++;
+ if (unlikely(status & FAULT_USERSUPV))
+ nr_icplb_supv_miss[cpu]++;
+
+ base = 0;
+ for (idx = 0; idx < icplb_nr_bounds; idx++) {
+ eaddr = icplb_bounds[idx].eaddr;
+ if (addr < eaddr)
+ break;
+ base = eaddr;
+ }
+ if (unlikely(idx == icplb_nr_bounds))
+ return CPLB_NO_ADDR_MATCH;
+
+ i_data = icplb_bounds[idx].data;
+ if (unlikely(i_data == 0))
+ return CPLB_NO_ADDR_MATCH;
+
+ addr1 = addr & ~(SIZE_4M - 1);
+ addr &= ~(SIZE_1M - 1);
+ i_data |= PAGE_SIZE_1MB;
+ if (addr1 >= base && (addr1 + SIZE_4M) <= eaddr) {
+ /*
+ * This works because
+ * (PAGE_SIZE_4MB & PAGE_SIZE_1MB) == PAGE_SIZE_1MB.
+ */
+ i_data |= PAGE_SIZE_4MB;
+ addr = addr1;
+ }
+
+ /* Pick entry to evict */
+ idx = evict_one_icplb(cpu);
+
+ write_icplb_data(cpu, idx, i_data, addr);
+
+ return CPLB_RELOADED;
+}
+
+MGR_ATTR static int dcplb_miss(int cpu)
+{
+ unsigned long addr = bfin_read_DCPLB_FAULT_ADDR();
+ int status = bfin_read_DCPLB_STATUS();
+ int idx;
+ unsigned long d_data, base, addr1, eaddr;
+
+ nr_dcplb_miss[cpu]++;
+ if (unlikely(status & FAULT_USERSUPV))
+ nr_dcplb_supv_miss[cpu]++;
+
+ base = 0;
+ for (idx = 0; idx < dcplb_nr_bounds; idx++) {
+ eaddr = dcplb_bounds[idx].eaddr;
+ if (addr < eaddr)
+ break;
+ base = eaddr;
+ }
+ if (unlikely(idx == dcplb_nr_bounds))
+ return CPLB_NO_ADDR_MATCH;
+
+ d_data = dcplb_bounds[idx].data;
+ if (unlikely(d_data == 0))
+ return CPLB_NO_ADDR_MATCH;
+
+ addr1 = addr & ~(SIZE_4M - 1);
+ addr &= ~(SIZE_1M - 1);
+ d_data |= PAGE_SIZE_1MB;
+ if (addr1 >= base && (addr1 + SIZE_4M) <= eaddr) {
+ /*
+ * This works because
+ * (PAGE_SIZE_4MB & PAGE_SIZE_1MB) == PAGE_SIZE_1MB.
+ */
+ d_data |= PAGE_SIZE_4MB;
+ addr = addr1;
+ }
+
+ /* Pick entry to evict */
+ idx = evict_one_dcplb(cpu);
+
+ write_dcplb_data(cpu, idx, d_data, addr);
+
+ return CPLB_RELOADED;
+}
+
+MGR_ATTR static noinline int dcplb_protection_fault(int cpu)
+{
+ int status = bfin_read_DCPLB_STATUS();
+
+ nr_dcplb_prot[cpu]++;
+
+ if (likely(status & FAULT_RW)) {
+ int idx = faulting_cplb_index(status);
+ unsigned long regaddr = DCPLB_DATA0 + idx * 4;
+ unsigned long data = bfin_read32(regaddr);
+
+ /* Check if fault is to dirty a clean page */
+ if (!(data & CPLB_WT) && !(data & CPLB_DIRTY) &&
+ write_permitted(status, data)) {
+
+ dcplb_tbl[cpu][idx].data = data;
+ bfin_write32(regaddr, data);
+ return CPLB_RELOADED;
+ }
+ }
+
+ return CPLB_PROT_VIOL;
+}
+
+MGR_ATTR int cplb_hdr(int seqstat, struct pt_regs *regs)
+{
+ int cause = seqstat & 0x3f;
+ unsigned int cpu = smp_processor_id();
+ switch (cause) {
+ case 0x2C:
+ return icplb_miss(cpu);
+ case 0x26:
+ return dcplb_miss(cpu);
+ default:
+ if (unlikely(cause == 0x23))
+ return dcplb_protection_fault(cpu);
+
+ return CPLB_UNKNOWN_ERR;
+ }
+}
diff --git a/arch/blackfin/kernel/cplbinfo.c b/arch/blackfin/kernel/cplbinfo.c
index 1d3bbec..64d7830 100644
--- a/arch/blackfin/kernel/cplbinfo.c
+++ b/arch/blackfin/kernel/cplbinfo.c
@@ -20,8 +20,6 @@
#define page(flags) (((flags) & 0x30000) >> 16)
#define strpage(flags) page_strtbl[page(flags)]
-#ifdef CONFIG_MPU
-
struct cplbinfo_data {
loff_t pos;
char cplb_type;
@@ -75,88 +73,6 @@
}
}
-#else
-
-struct cplbinfo_data {
- loff_t pos;
- char cplb_type;
- u32 mem_control;
- unsigned long *pdt_tables, *pdt_swapcount;
- unsigned long cplb_addr, cplb_data;
-};
-
-extern int page_size_table[];
-
-static int cplb_find_entry(unsigned long addr_tbl, unsigned long data_tbl,
- unsigned long addr_find, unsigned long data_find)
-{
- int i;
-
- for (i = 0; i < 16; ++i) {
- unsigned long cplb_addr = bfin_read32(addr_tbl + i * 4);
- unsigned long cplb_data = bfin_read32(data_tbl + i * 4);
- if (addr_find >= cplb_addr &&
- addr_find < cplb_addr + page_size_table[page(cplb_data)] &&
- cplb_data == data_find)
- return i;
- }
-
- return -1;
-}
-
-static void cplbinfo_print_header(struct seq_file *m)
-{
- seq_printf(m, "Address\t\tData\tSize\tValid\tLocked\tSwapin\tiCount\toCount\n");
-}
-
-static int cplbinfo_nomore(struct cplbinfo_data *cdata)
-{
- return cdata->pdt_tables[cdata->pos * 2] == 0xffffffff;
-}
-
-static int cplbinfo_show(struct seq_file *m, void *p)
-{
- struct cplbinfo_data *cdata;
- unsigned long data, addr;
- int entry;
- loff_t pos;
-
- cdata = p;
- pos = cdata->pos * 2;
- addr = cdata->pdt_tables[pos];
- data = cdata->pdt_tables[pos + 1];
- entry = cplb_find_entry(cdata->cplb_addr, cdata->cplb_data, addr, data);
-
- seq_printf(m,
- "0x%08lx\t0x%05lx\t%s\t%c\t%c\t%2d\t%ld\t%ld\n",
- addr, data, strpage(data),
- (data & CPLB_VALID) ? 'Y' : 'N',
- (data & CPLB_LOCK) ? 'Y' : 'N', entry,
- cdata->pdt_swapcount[pos],
- cdata->pdt_swapcount[pos + 1]);
-
- return 0;
-}
-
-static void cplbinfo_seq_init(struct cplbinfo_data *cdata, unsigned int cpu)
-{
- if (cdata->cplb_type == 'I') {
- cdata->mem_control = bfin_read_IMEM_CONTROL();
- cdata->pdt_tables = ipdt_tables[cpu];
- cdata->pdt_swapcount = ipdt_swapcount_tables[cpu];
- cdata->cplb_addr = ICPLB_ADDR0;
- cdata->cplb_data = ICPLB_DATA0;
- } else {
- cdata->mem_control = bfin_read_DMEM_CONTROL();
- cdata->pdt_tables = dpdt_tables[cpu];
- cdata->pdt_swapcount = dpdt_swapcount_tables[cpu];
- cdata->cplb_addr = DCPLB_ADDR0;
- cdata->cplb_data = DCPLB_DATA0;
- }
-}
-
-#endif
-
static void *cplbinfo_start(struct seq_file *m, loff_t *pos)
{
struct cplbinfo_data *cdata = m->private;
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index d3d37e7..20d04a1 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -88,6 +88,7 @@
{
unsigned int cpu;
+ generate_cplb_tables_all();
/* Generate per-CPU I&D CPLB tables */
for (cpu = 0; cpu < num_possible_cpus(); ++cpu)
generate_cplb_tables_cpu(cpu);
@@ -97,19 +98,11 @@
void __cpuinit bfin_setup_caches(unsigned int cpu)
{
#ifdef CONFIG_BFIN_ICACHE
-#ifdef CONFIG_MPU
bfin_icache_init(icplb_tbl[cpu]);
-#else
- bfin_icache_init(icplb_tables[cpu]);
-#endif
#endif
#ifdef CONFIG_BFIN_DCACHE
-#ifdef CONFIG_MPU
bfin_dcache_init(dcplb_tbl[cpu]);
-#else
- bfin_dcache_init(dcplb_tables[cpu]);
-#endif
#endif
/*
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S
index 0efd5f5..fae7746 100644
--- a/arch/blackfin/mach-common/entry.S
+++ b/arch/blackfin/mach-common/entry.S
@@ -112,24 +112,21 @@
ENTRY(_ex_dcplb_miss)
ENTRY(_ex_icplb_miss)
(R7:6,P5:4) = [sp++];
- ASTAT = [sp++];
- SAVE_ALL_SYS
-#ifdef CONFIG_MPU
+ /* We leave the previously pushed ASTAT on the stack. */
+ SAVE_CONTEXT_CPLB
+
/* We must load R1 here, _before_ DEBUG_HWTRACE_SAVE, since that
* will change the stack pointer. */
R0 = SEQSTAT;
R1 = SP;
-#endif
+
DEBUG_HWTRACE_SAVE(p5, r7)
-#ifdef CONFIG_MPU
+
sp += -12;
call _cplb_hdr;
sp += 12;
CC = R0 == 0;
IF !CC JUMP _handle_bad_cplb;
-#else
- call __cplb_hdr;
-#endif
#ifdef CONFIG_DEBUG_DOUBLEFAULT
/* While we were processing this, did we double fault? */
@@ -143,7 +140,8 @@
#endif
DEBUG_HWTRACE_RESTORE(p5, r7)
- RESTORE_ALL_SYS
+ RESTORE_CONTEXT_CPLB
+ ASTAT = [SP++];
SP = EX_SCRATCH_REG;
rtx;
ENDPROC(_ex_icplb_miss)
@@ -298,9 +296,8 @@
* the stack to get ready so, we can fall through - we
* need to make a CPLB exception look like a normal exception
*/
-
- RESTORE_ALL_SYS
- [--sp] = ASTAT;
+ RESTORE_CONTEXT_CPLB
+ /* ASTAT is still on the stack, where it is needed. */
[--sp] = (R7:6,P5:4);
ENTRY(_ex_replaceable)
diff --git a/arch/blackfin/mm/init.c b/arch/blackfin/mm/init.c
index 57d306b..d0532b7 100644
--- a/arch/blackfin/mm/init.c
+++ b/arch/blackfin/mm/init.c
@@ -119,16 +119,6 @@
cpu_pda[cpu].ex_stack = exception_stack[cpu + 1];
-#ifdef CONFIG_MPU
-#else
- cpu_pda[cpu].ipdt = ipdt_tables[cpu];
- cpu_pda[cpu].dpdt = dpdt_tables[cpu];
-#ifdef CONFIG_CPLB_INFO
- cpu_pda[cpu].ipdt_swapcount = ipdt_swapcount_tables[cpu];
- cpu_pda[cpu].dpdt_swapcount = dpdt_swapcount_tables[cpu];
-#endif
-#endif
-
#ifdef CONFIG_SMP
cpu_pda[cpu].imask = 0x1f;
#endif