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-rw-r--r--arch/blackfin/kernel/cplb-nompu/Makefile8
-rw-r--r--arch/blackfin/kernel/cplb-nompu/cacheinit.c25
-rw-r--r--arch/blackfin/kernel/cplb-nompu/cplbhdlr.S130
-rw-r--r--arch/blackfin/kernel/cplb-nompu/cplbinfo.c195
-rw-r--r--arch/blackfin/kernel/cplb-nompu/cplbinit.c521
-rw-r--r--arch/blackfin/kernel/cplb-nompu/cplbmgr.S646
-rw-r--r--arch/blackfin/kernel/cplb-nompu/cplbmgr.c283
7 files changed, 411 insertions, 1397 deletions
diff --git a/arch/blackfin/kernel/cplb-nompu/Makefile b/arch/blackfin/kernel/cplb-nompu/Makefile
index d36ea9b5382..7d70d3bf321 100644
--- a/arch/blackfin/kernel/cplb-nompu/Makefile
+++ b/arch/blackfin/kernel/cplb-nompu/Makefile
@@ -2,7 +2,9 @@
# arch/blackfin/kernel/cplb-nompu/Makefile
#
-obj-y := cplbinit.o cacheinit.o cplbhdlr.o cplbmgr.o
-
-obj-$(CONFIG_CPLB_INFO) += cplbinfo.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 bd0831592c2..c6ff947f9d3 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 __init bfin_icache_init(void)
+void __cpuinit bfin_icache_init(struct cplb_entry *icplb_tbl)
{
- unsigned long *table = icplb_table;
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;
@@ -47,20 +43,17 @@ void __init bfin_icache_init(void)
#endif
#if defined(CONFIG_BFIN_DCACHE)
-void __init bfin_dcache_init(void)
+void __cpuinit bfin_dcache_init(struct cplb_entry *dcplb_tbl)
{
- unsigned long *table = dcplb_table;
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);
diff --git a/arch/blackfin/kernel/cplb-nompu/cplbhdlr.S b/arch/blackfin/kernel/cplb-nompu/cplbhdlr.S
deleted file mode 100644
index ecbabc0a1fe..00000000000
--- 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/cplbinfo.c b/arch/blackfin/kernel/cplb-nompu/cplbinfo.c
deleted file mode 100644
index 1e74f0b9799..00000000000
--- a/arch/blackfin/kernel/cplb-nompu/cplbinfo.c
+++ /dev/null
@@ -1,195 +0,0 @@
-/*
- * File: arch/blackfin/mach-common/cplbinfo.c
- * Based on:
- * Author: Sonic Zhang <sonic.zhang@analog.com>
- *
- * Created: Jan. 2005
- * Description: Display CPLB status
- *
- * 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/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/proc_fs.h>
-#include <linux/uaccess.h>
-
-#include <asm/cplbinit.h>
-#include <asm/blackfin.h>
-
-#define CPLB_I 1
-#define CPLB_D 2
-
-#define SYNC_SYS SSYNC()
-#define SYNC_CORE CSYNC()
-
-#define CPLB_BIT_PAGESIZE 0x30000
-
-static int page_size_table[4] = {
- 0x00000400, /* 1K */
- 0x00001000, /* 4K */
- 0x00100000, /* 1M */
- 0x00400000 /* 4M */
-};
-
-static char page_size_string_table[][4] = { "1K", "4K", "1M", "4M" };
-
-static int cplb_find_entry(unsigned long *cplb_addr,
- unsigned long *cplb_data, unsigned long addr,
- unsigned long data)
-{
- int ii;
-
- for (ii = 0; ii < 16; ii++)
- if (addr >= cplb_addr[ii] && addr < cplb_addr[ii] +
- page_size_table[(cplb_data[ii] & CPLB_BIT_PAGESIZE) >> 16]
- && (cplb_data[ii] == data))
- return ii;
-
- return -1;
-}
-
-static char *cplb_print_entry(char *buf, int type)
-{
- unsigned long *p_addr = dpdt_table;
- unsigned long *p_data = dpdt_table + 1;
- unsigned long *p_icount = dpdt_swapcount_table;
- unsigned long *p_ocount = dpdt_swapcount_table + 1;
- unsigned long *cplb_addr = (unsigned long *)DCPLB_ADDR0;
- unsigned long *cplb_data = (unsigned long *)DCPLB_DATA0;
- int entry = 0, used_cplb = 0;
-
- if (type == CPLB_I) {
- buf += sprintf(buf, "Instruction CPLB entry:\n");
- p_addr = ipdt_table;
- p_data = ipdt_table + 1;
- p_icount = ipdt_swapcount_table;
- p_ocount = ipdt_swapcount_table + 1;
- cplb_addr = (unsigned long *)ICPLB_ADDR0;
- cplb_data = (unsigned long *)ICPLB_DATA0;
- } else
- buf += sprintf(buf, "Data CPLB entry:\n");
-
- buf += sprintf(buf, "Address\t\tData\tSize\tValid\tLocked\tSwapin\tiCount\toCount\n");
-
- while (*p_addr != 0xffffffff) {
- entry = cplb_find_entry(cplb_addr, cplb_data, *p_addr, *p_data);
- if (entry >= 0)
- used_cplb |= 1 << entry;
-
- buf +=
- sprintf(buf,
- "0x%08lx\t0x%05lx\t%s\t%c\t%c\t%2d\t%ld\t%ld\n",
- *p_addr, *p_data,
- page_size_string_table[(*p_data & 0x30000) >> 16],
- (*p_data & CPLB_VALID) ? 'Y' : 'N',
- (*p_data & CPLB_LOCK) ? 'Y' : 'N', entry, *p_icount,
- *p_ocount);
-
- p_addr += 2;
- p_data += 2;
- p_icount += 2;
- p_ocount += 2;
- }
-
- if (used_cplb != 0xffff) {
- buf += sprintf(buf, "Unused/mismatched CPLBs:\n");
-
- for (entry = 0; entry < 16; entry++)
- if (0 == ((1 << entry) & used_cplb)) {
- int flags = cplb_data[entry];
- buf +=
- sprintf(buf,
- "%2d: 0x%08lx\t0x%05x\t%s\t%c\t%c\n",
- entry, cplb_addr[entry], flags,
- page_size_string_table[(flags &
- 0x30000) >>
- 16],
- (flags & CPLB_VALID) ? 'Y' : 'N',
- (flags & CPLB_LOCK) ? 'Y' : 'N');
- }
- }
-
- buf += sprintf(buf, "\n");
-
- return buf;
-}
-
-static int cplbinfo_proc_output(char *buf)
-{
- char *p;
-
- p = buf;
-
- p += sprintf(p, "------------------ CPLB Information ------------------\n\n");
-
- if (bfin_read_IMEM_CONTROL() & ENICPLB)
- p = cplb_print_entry(p, CPLB_I);
- else
- p += sprintf(p, "Instruction CPLB is disabled.\n\n");
-
- if (bfin_read_DMEM_CONTROL() & ENDCPLB)
- p = cplb_print_entry(p, CPLB_D);
- else
- p += sprintf(p, "Data CPLB is disabled.\n");
-
- return p - buf;
-}
-
-static int cplbinfo_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- int len;
-
- len = cplbinfo_proc_output(page);
- if (len <= off + count)
- *eof = 1;
- *start = page + off;
- len -= off;
- if (len > count)
- len = count;
- if (len < 0)
- len = 0;
- return len;
-}
-
-static int __init cplbinfo_init(void)
-{
- struct proc_dir_entry *entry;
-
- entry = create_proc_entry("cplbinfo", 0, NULL);
- if (!entry)
- return -ENOMEM;
-
- entry->read_proc = cplbinfo_read_proc;
- entry->data = NULL;
-
- return 0;
-}
-
-static void __exit cplbinfo_exit(void)
-{
- remove_proc_entry("cplbinfo", NULL);
-}
-
-module_init(cplbinfo_init);
-module_exit(cplbinfo_exit);
diff --git a/arch/blackfin/kernel/cplb-nompu/cplbinit.c b/arch/blackfin/kernel/cplb-nompu/cplbinit.c
index 2debc900e24..0e28f759573 100644
--- a/arch/blackfin/kernel/cplb-nompu/cplbinit.c
+++ b/arch/blackfin/kernel/cplb-nompu/cplbinit.c
@@ -20,445 +20,152 @@
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
#include <linux/module.h>
#include <asm/blackfin.h>
#include <asm/cacheflush.h>
#include <asm/cplb.h>
#include <asm/cplbinit.h>
+#include <asm/mem_map.h>
-#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)
-
-
-u_long icplb_table[MAX_CPLBS + 1];
-u_long dcplb_table[MAX_CPLBS + 1];
-
-#ifdef CONFIG_CPLB_SWITCH_TAB_L1
-# define PDT_ATTR __attribute__((l1_data))
-#else
-# define PDT_ATTR
-#endif
-
-u_long ipdt_table[MAX_SWITCH_I_CPLBS + 1] PDT_ATTR;
-u_long dpdt_table[MAX_SWITCH_D_CPLBS + 1] PDT_ATTR;
+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_INFO
-u_long ipdt_swapcount_table[MAX_SWITCH_I_CPLBS] PDT_ATTR;
-u_long dpdt_swapcount_table[MAX_SWITCH_D_CPLBS] PDT_ATTR;
-#endif
+int first_switched_icplb PDT_ATTR;
+int first_switched_dcplb 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;
-};
+struct cplb_boundary dcplb_bounds[9] PDT_ATTR;
+struct cplb_boundary icplb_bounds[7] PDT_ATTR;
-#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 = L1_CODE_START,
- .end = L1_CODE_START + L1_CODE_LENGTH,
- .psize = SIZE_4M,
- .attr = INITIAL_T | SWITCH_T | I_CPLB,
- .i_conf = L1_IMEMORY,
- .d_conf = 0,
- .valid = 1,
- .name = "L1 I-Memory",
- },
- {
- .start = L1_DATA_A_START,
- .end = L1_DATA_B_START + L1_DATA_B_LENGTH,
- .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 = 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 = L2_START,
- .end = L2_START + L2_LENGTH,
- .psize = SIZE_1M,
- .attr = SWITCH_T | I_CPLB | D_CPLB,
- .i_conf = L2_IMEMORY,
- .d_conf = L2_DMEMORY,
- .valid = (L2_LENGTH > 0),
- .name = "L2 Memory",
- },
- {
- .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",
- },
-};
+int icplb_nr_bounds PDT_ATTR;
+int dcplb_nr_bounds PDT_ATTR;
-static u16 __init lock_kernel_check(u32 start, u32 end)
+void __init generate_cplb_tables_cpu(unsigned int cpu)
{
- if (start >= (u32)_end || end <= (u32)_stext)
- return 0;
+ int i_d, i_i;
+ unsigned long addr;
- /* This cplb block overlapped with kernel area. */
- return IN_KERNEL;
-}
+ struct cplb_entry *d_tbl = dcplb_tbl[cpu];
+ struct cplb_entry *i_tbl = icplb_tbl[cpu];
-static unsigned short __init
-fill_cplbtab(struct cplb_tab *table,
- unsigned long start, unsigned long end,
- unsigned long block_size, unsigned long cplb_data)
-{
- int i;
+ printk(KERN_INFO "NOMPU: setting up cplb tables\n");
- 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)) {
+ i_d = i_i = 0;
- table->tab[table->pos++] = start;
+ /* Set up the zero page. */
+ d_tbl[i_d].addr = 0;
+ d_tbl[i_d++].data = SDRAM_OOPS | PAGE_SIZE_1KB;
- if (lock_kernel_check(start, start + block_size) == IN_KERNEL)
- table->tab[table->pos++] =
- cplb_data | CPLB_LOCK | CPLB_DIRTY;
- else
- table->tab[table->pos++] = cplb_data;
+ /* Cover kernel memory with 4M pages. */
+ addr = 0;
- start += block_size;
+ 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;
}
- return 0;
-}
-static unsigned short __init
-close_cplbtab(struct cplb_tab *table)
-{
-
- while (table->pos < table->size) {
-
- table->tab[table->pos++] = 0;
- table->tab[table->pos++] = 0; /* !CPLB_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;
}
- return 0;
-}
+ i_tbl[i_i].addr = L1_CODE_START;
+ i_tbl[i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB;
-/* 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);
- }
- }
-}
+ first_switched_dcplb = i_d;
+ first_switched_icplb = i_i;
-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);
- }
+ BUG_ON(first_switched_dcplb > MAX_CPLBS);
+ BUG_ON(first_switched_icplb > MAX_CPLBS);
+
+ 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(void)
+void __init generate_cplb_tables_all(void)
{
+ int i_d, i_i;
- u16 i, j, process;
- u32 a_start, a_end, as, ae, as_1m;
-
- struct cplb_tab *t_i = NULL;
- struct cplb_tab *t_d = NULL;
- struct s_cplb cplb;
-
- printk(KERN_INFO "NOMPU: setting up cplb tables for global access\n");
-
- cplb.init_i.size = MAX_CPLBS;
- cplb.init_d.size = MAX_CPLBS;
- cplb.switch_i.size = MAX_SWITCH_I_CPLBS;
- cplb.switch_d.size = MAX_SWITCH_D_CPLBS;
-
- cplb.init_i.pos = 0;
- cplb.init_d.pos = 0;
- cplb.switch_i.pos = 0;
- cplb.switch_d.pos = 0;
-
- cplb.init_i.tab = icplb_table;
- cplb.init_d.tab = dcplb_table;
- cplb.switch_i.tab = ipdt_table;
- cplb.switch_d.tab = dpdt_table;
-
- cplb_data[SDRAM_KERN].end = memory_end;
-
+ i_d = 0;
+ /* Normal RAM, including MTD FS. */
#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
+ dcplb_bounds[i_d].eaddr = memory_mtd_start + mtd_size;
#else
- cplb_data[SDRAM_RAM_MTD].valid = 0;
+ 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));
- 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) {
+ i_i = 0;
+ /* Normal RAM, including MTD FS. */
#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
+ icplb_bounds[i_i].eaddr = memory_mtd_start + mtd_size;
+#else
+ icplb_bounds[i_i].eaddr = memory_end;
#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);
- }
+ 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;
}
-
-/* close tables */
-
- close_cplbtab(&cplb.init_i);
- close_cplbtab(&cplb.init_d);
-
- 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;
-
+ 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));
}
-
-#endif
-
diff --git a/arch/blackfin/kernel/cplb-nompu/cplbmgr.S b/arch/blackfin/kernel/cplb-nompu/cplbmgr.S
deleted file mode 100644
index f5cf3accef3..00000000000
--- a/arch/blackfin/kernel/cplb-nompu/cplbmgr.S
+++ /dev/null
@@ -1,646 +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>
-
-#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];
- P2.L = _ipdt_table;
- P2.H = _ipdt_table;
- P3.L = _ipdt_swapcount_table;
- P3.H = _ipdt_swapcount_table;
- 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.
- */
-
- P2.L = _ipdt_table;
- P2.H = _ipdt_table;
-#ifdef CONFIG_CPLB_INFO
- P3.L = _ipdt_swapcount_table;
- P3.H = _ipdt_swapcount_table;
- 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];
- P2.L = _dpdt_table;
- P2.H = _dpdt_table;
- P3.L = _dpdt_swapcount_table;
- P3.H = _dpdt_swapcount_table;
- 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 */
-
- P2.L = _dpdt_table;
- P2.H = _dpdt_table;
-#ifdef CONFIG_CPLB_INFO
- P3.L = _dpdt_swapcount_table;
- P3.H = _dpdt_swapcount_table;
- 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)
-
-.data
-.align 4;
-_page_size_table:
-.byte4 0x00000400; /* 1K */
-.byte4 0x00001000; /* 4K */
-.byte4 0x00100000; /* 1M */
-.byte4 0x00400000; /* 4M */
-
-.align 4;
-_dcplb_preference:
-.byte4 0x00000001; /* valid bit */
-.byte4 0x00000002; /* lock bit */
diff --git a/arch/blackfin/kernel/cplb-nompu/cplbmgr.c b/arch/blackfin/kernel/cplb-nompu/cplbmgr.c
new file mode 100644
index 00000000000..376249ab269
--- /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;
+ }
+}