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authorGraf Yang <graf.yang@analog.com>2008-11-18 17:48:22 +0800
committerBryan Wu <cooloney@kernel.org>2008-11-18 17:48:22 +0800
commitb8a989893cbdeb6c97a7b5af5f38fb0e480235f9 (patch)
tree658cf6df93dac687f0d6b94111d0f53b3dd0177c /arch/blackfin/kernel/cplb-mpu
parent6b3087c64a92a36ae20d33479b4df6d7afc910d4 (diff)
Blackfin arch: SMP supporting patchset: Blackfin CPLB related code
Blackfin dual core BF561 processor can support SMP like features. https://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:smp-like In this patch, we provide SMP extend to Blackfin CPLB related code Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/kernel/cplb-mpu')
-rw-r--r--arch/blackfin/kernel/cplb-mpu/cacheinit.c4
-rw-r--r--arch/blackfin/kernel/cplb-mpu/cplbinfo.c43
-rw-r--r--arch/blackfin/kernel/cplb-mpu/cplbinit.c43
-rw-r--r--arch/blackfin/kernel/cplb-mpu/cplbmgr.c102
4 files changed, 104 insertions, 88 deletions
diff --git a/arch/blackfin/kernel/cplb-mpu/cacheinit.c b/arch/blackfin/kernel/cplb-mpu/cacheinit.c
index a8b712a24c5..c6ff947f9d3 100644
--- a/arch/blackfin/kernel/cplb-mpu/cacheinit.c
+++ b/arch/blackfin/kernel/cplb-mpu/cacheinit.c
@@ -25,7 +25,7 @@
#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 ctrl;
int i;
@@ -43,7 +43,7 @@ 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 ctrl;
int i;
diff --git a/arch/blackfin/kernel/cplb-mpu/cplbinfo.c b/arch/blackfin/kernel/cplb-mpu/cplbinfo.c
index 822beefa3a4..00cb2cf3a42 100644
--- a/arch/blackfin/kernel/cplb-mpu/cplbinfo.c
+++ b/arch/blackfin/kernel/cplb-mpu/cplbinfo.c
@@ -66,32 +66,32 @@ static char *cplb_print_entry(char *buf, struct cplb_entry *tbl, int switched)
return buf;
}
-int cplbinfo_proc_output(char *buf)
+int cplbinfo_proc_output(char *buf, void *data)
{
char *p;
+ unsigned int cpu = (unsigned int)data;;
p = buf;
- p += sprintf(p, "------------------ CPLB Information ------------------\n\n");
-
+ p += sprintf(p, "------------- CPLB Information on CPU%u --------------\n\n", cpu);
if (bfin_read_IMEM_CONTROL() & ENICPLB) {
p += sprintf(p, "Instruction CPLB entry:\n");
- p = cplb_print_entry(p, icplb_tbl, first_switched_icplb);
+ p = cplb_print_entry(p, icplb_tbl[cpu], first_switched_icplb);
} else
p += sprintf(p, "Instruction CPLB is disabled.\n\n");
if (1 || bfin_read_DMEM_CONTROL() & ENDCPLB) {
p += sprintf(p, "Data CPLB entry:\n");
- p = cplb_print_entry(p, dcplb_tbl, first_switched_dcplb);
+ p = cplb_print_entry(p, dcplb_tbl[cpu], first_switched_dcplb);
} else
p += sprintf(p, "Data CPLB is disabled.\n");
p += sprintf(p, "ICPLB miss: %d\nICPLB supervisor miss: %d\n",
- nr_icplb_miss, nr_icplb_supv_miss);
+ nr_icplb_miss[cpu], nr_icplb_supv_miss[cpu]);
p += sprintf(p, "DCPLB miss: %d\nDCPLB protection fault:%d\n",
- nr_dcplb_miss, nr_dcplb_prot);
+ nr_dcplb_miss[cpu], nr_dcplb_prot[cpu]);
p += sprintf(p, "CPLB flushes: %d\n",
- nr_cplb_flush);
+ nr_cplb_flush[cpu]);
return p - buf;
}
@@ -101,7 +101,7 @@ static int cplbinfo_read_proc(char *page, char **start, off_t off,
{
int len;
- len = cplbinfo_proc_output(page);
+ len = cplbinfo_proc_output(page, data);
if (len <= off + count)
*eof = 1;
*start = page + off;
@@ -115,20 +115,33 @@ static int cplbinfo_read_proc(char *page, char **start, off_t off,
static int __init cplbinfo_init(void)
{
- struct proc_dir_entry *entry;
+ struct proc_dir_entry *parent, *entry;
+ unsigned int cpu;
+ unsigned char str[10];
+
+ parent = proc_mkdir("cplbinfo", NULL);
- entry = create_proc_entry("cplbinfo", 0, NULL);
- if (!entry)
- return -ENOMEM;
+ for_each_online_cpu(cpu) {
+ sprintf(str, "cpu%u", cpu);
+ entry = create_proc_entry(str, 0, parent);
+ if (!entry)
+ return -ENOMEM;
- entry->read_proc = cplbinfo_read_proc;
- entry->data = NULL;
+ entry->read_proc = cplbinfo_read_proc;
+ entry->data = (void *)cpu;
+ }
return 0;
}
static void __exit cplbinfo_exit(void)
{
+ unsigned int cpu;
+ unsigned char str[20];
+ for_each_online_cpu(cpu) {
+ sprintf(str, "cplbinfo/cpu%u", cpu);
+ remove_proc_entry(str, NULL);
+ }
remove_proc_entry("cplbinfo", NULL);
}
diff --git a/arch/blackfin/kernel/cplb-mpu/cplbinit.c b/arch/blackfin/kernel/cplb-mpu/cplbinit.c
index 55af729f849..269d2a3530a 100644
--- a/arch/blackfin/kernel/cplb-mpu/cplbinit.c
+++ b/arch/blackfin/kernel/cplb-mpu/cplbinit.c
@@ -30,13 +30,13 @@
# error the MPU will not function safely while Anomaly 05000263 applies
#endif
-struct cplb_entry icplb_tbl[MAX_CPLBS];
-struct cplb_entry dcplb_tbl[MAX_CPLBS];
+struct cplb_entry icplb_tbl[NR_CPUS][MAX_CPLBS];
+struct cplb_entry dcplb_tbl[NR_CPUS][MAX_CPLBS];
int first_switched_icplb, first_switched_dcplb;
int first_mask_dcplb;
-void __init generate_cplb_tables(void)
+void __init generate_cplb_tables_cpu(unsigned int cpu)
{
int i_d, i_i;
unsigned long addr;
@@ -55,15 +55,16 @@ void __init generate_cplb_tables(void)
d_cache |= CPLB_L1_AOW | CPLB_WT;
#endif
#endif
+
i_d = i_i = 0;
/* Set up the zero page. */
- dcplb_tbl[i_d].addr = 0;
- dcplb_tbl[i_d++].data = SDRAM_OOPS | PAGE_SIZE_1KB;
+ dcplb_tbl[cpu][i_d].addr = 0;
+ dcplb_tbl[cpu][i_d++].data = SDRAM_OOPS | PAGE_SIZE_1KB;
#if 0
- icplb_tbl[i_i].addr = 0;
- icplb_tbl[i_i++].data = i_cache | CPLB_USER_RD | PAGE_SIZE_4KB;
+ icplb_tbl[cpu][i_i].addr = 0;
+ icplb_tbl[cpu][i_i++].data = i_cache | CPLB_USER_RD | PAGE_SIZE_4KB;
#endif
/* Cover kernel memory with 4M pages. */
@@ -72,28 +73,28 @@ void __init generate_cplb_tables(void)
i_data = i_cache | CPLB_VALID | CPLB_PORTPRIO | PAGE_SIZE_4MB;
for (; addr < memory_start; addr += 4 * 1024 * 1024) {
- dcplb_tbl[i_d].addr = addr;
- dcplb_tbl[i_d++].data = d_data;
- icplb_tbl[i_i].addr = addr;
- icplb_tbl[i_i++].data = i_data | (addr == 0 ? CPLB_USER_RD : 0);
+ dcplb_tbl[cpu][i_d].addr = addr;
+ dcplb_tbl[cpu][i_d++].data = d_data;
+ icplb_tbl[cpu][i_i].addr = addr;
+ icplb_tbl[cpu][i_i++].data = i_data | (addr == 0 ? CPLB_USER_RD : 0);
}
/* Cover L1 memory. One 4M area for code and data each is enough. */
#if L1_DATA_A_LENGTH > 0 || L1_DATA_B_LENGTH > 0
- dcplb_tbl[i_d].addr = L1_DATA_A_START;
- dcplb_tbl[i_d++].data = L1_DMEMORY | PAGE_SIZE_4MB;
+ dcplb_tbl[cpu][i_d].addr = get_l1_data_a_start_cpu(cpu);
+ dcplb_tbl[cpu][i_d++].data = L1_DMEMORY | PAGE_SIZE_4MB;
#endif
#if L1_CODE_LENGTH > 0
- icplb_tbl[i_i].addr = L1_CODE_START;
- icplb_tbl[i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB;
+ icplb_tbl[cpu][i_i].addr = get_l1_code_start_cpu(cpu);
+ icplb_tbl[cpu][i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB;
#endif
/* Cover L2 memory */
#if L2_LENGTH > 0
- dcplb_tbl[i_d].addr = L2_START;
- dcplb_tbl[i_d++].data = L2_DMEMORY | PAGE_SIZE_1MB;
- icplb_tbl[i_i].addr = L2_START;
- icplb_tbl[i_i++].data = L2_IMEMORY | PAGE_SIZE_1MB;
+ dcplb_tbl[cpu][i_d].addr = L2_START;
+ dcplb_tbl[cpu][i_d++].data = L2_DMEMORY | PAGE_SIZE_1MB;
+ icplb_tbl[cpu][i_i].addr = L2_START;
+ icplb_tbl[cpu][i_i++].data = L2_IMEMORY | PAGE_SIZE_1MB;
#endif
first_mask_dcplb = i_d;
@@ -101,7 +102,7 @@ void __init generate_cplb_tables(void)
first_switched_icplb = i_i;
while (i_d < MAX_CPLBS)
- dcplb_tbl[i_d++].data = 0;
+ dcplb_tbl[cpu][i_d++].data = 0;
while (i_i < MAX_CPLBS)
- icplb_tbl[i_i++].data = 0;
+ icplb_tbl[cpu][i_i++].data = 0;
}
diff --git a/arch/blackfin/kernel/cplb-mpu/cplbmgr.c b/arch/blackfin/kernel/cplb-mpu/cplbmgr.c
index baa52e261f0..76bd99177de 100644
--- a/arch/blackfin/kernel/cplb-mpu/cplbmgr.c
+++ b/arch/blackfin/kernel/cplb-mpu/cplbmgr.c
@@ -30,10 +30,11 @@
int page_mask_nelts;
int page_mask_order;
-unsigned long *current_rwx_mask;
+unsigned long *current_rwx_mask[NR_CPUS];
-int nr_dcplb_miss, nr_icplb_miss, nr_icplb_supv_miss, nr_dcplb_prot;
-int nr_cplb_flush;
+int nr_dcplb_miss[NR_CPUS], nr_icplb_miss[NR_CPUS];
+int nr_icplb_supv_miss[NR_CPUS], nr_dcplb_prot[NR_CPUS];
+int nr_cplb_flush[NR_CPUS];
static inline void disable_dcplb(void)
{
@@ -98,42 +99,42 @@ static inline int write_permitted(int status, unsigned long data)
}
/* Counters to implement round-robin replacement. */
-static int icplb_rr_index, dcplb_rr_index;
+static int icplb_rr_index[NR_CPUS], dcplb_rr_index[NR_CPUS];
/*
* Find an ICPLB entry to be evicted and return its index.
*/
-static int evict_one_icplb(void)
+static int evict_one_icplb(unsigned int cpu)
{
int i;
for (i = first_switched_icplb; i < MAX_CPLBS; i++)
- if ((icplb_tbl[i].data & CPLB_VALID) == 0)
+ if ((icplb_tbl[cpu][i].data & CPLB_VALID) == 0)
return i;
- i = first_switched_icplb + icplb_rr_index;
+ i = first_switched_icplb + icplb_rr_index[cpu];
if (i >= MAX_CPLBS) {
i -= MAX_CPLBS - first_switched_icplb;
- icplb_rr_index -= MAX_CPLBS - first_switched_icplb;
+ icplb_rr_index[cpu] -= MAX_CPLBS - first_switched_icplb;
}
- icplb_rr_index++;
+ icplb_rr_index[cpu]++;
return i;
}
-static int evict_one_dcplb(void)
+static int evict_one_dcplb(unsigned int cpu)
{
int i;
for (i = first_switched_dcplb; i < MAX_CPLBS; i++)
- if ((dcplb_tbl[i].data & CPLB_VALID) == 0)
+ if ((dcplb_tbl[cpu][i].data & CPLB_VALID) == 0)
return i;
- i = first_switched_dcplb + dcplb_rr_index;
+ i = first_switched_dcplb + dcplb_rr_index[cpu];
if (i >= MAX_CPLBS) {
i -= MAX_CPLBS - first_switched_dcplb;
- dcplb_rr_index -= MAX_CPLBS - first_switched_dcplb;
+ dcplb_rr_index[cpu] -= MAX_CPLBS - first_switched_dcplb;
}
- dcplb_rr_index++;
+ dcplb_rr_index[cpu]++;
return i;
}
-static noinline int dcplb_miss(void)
+static noinline int dcplb_miss(unsigned int cpu)
{
unsigned long addr = bfin_read_DCPLB_FAULT_ADDR();
int status = bfin_read_DCPLB_STATUS();
@@ -141,7 +142,7 @@ static noinline int dcplb_miss(void)
int idx;
unsigned long d_data;
- nr_dcplb_miss++;
+ nr_dcplb_miss[cpu]++;
d_data = CPLB_SUPV_WR | CPLB_VALID | CPLB_DIRTY | PAGE_SIZE_4KB;
#ifdef CONFIG_BFIN_DCACHE
@@ -168,25 +169,25 @@ static noinline int dcplb_miss(void)
} else if (addr >= _ramend) {
d_data |= CPLB_USER_RD | CPLB_USER_WR;
} else {
- mask = current_rwx_mask;
+ mask = current_rwx_mask[cpu];
if (mask) {
int page = addr >> PAGE_SHIFT;
- int offs = page >> 5;
+ int idx = page >> 5;
int bit = 1 << (page & 31);
- if (mask[offs] & bit)
+ if (mask[idx] & bit)
d_data |= CPLB_USER_RD;
mask += page_mask_nelts;
- if (mask[offs] & bit)
+ if (mask[idx] & bit)
d_data |= CPLB_USER_WR;
}
}
- idx = evict_one_dcplb();
+ idx = evict_one_dcplb(cpu);
addr &= PAGE_MASK;
- dcplb_tbl[idx].addr = addr;
- dcplb_tbl[idx].data = d_data;
+ dcplb_tbl[cpu][idx].addr = addr;
+ dcplb_tbl[cpu][idx].data = d_data;
disable_dcplb();
bfin_write32(DCPLB_DATA0 + idx * 4, d_data);
@@ -196,21 +197,21 @@ static noinline int dcplb_miss(void)
return 0;
}
-static noinline int icplb_miss(void)
+static noinline int icplb_miss(unsigned int cpu)
{
unsigned long addr = bfin_read_ICPLB_FAULT_ADDR();
int status = bfin_read_ICPLB_STATUS();
int idx;
unsigned long i_data;
- nr_icplb_miss++;
+ nr_icplb_miss[cpu]++;
/* If inside the uncached DMA region, fault. */
if (addr >= _ramend - DMA_UNCACHED_REGION && addr < _ramend)
return CPLB_PROT_VIOL;
if (status & FAULT_USERSUPV)
- nr_icplb_supv_miss++;
+ nr_icplb_supv_miss[cpu]++;
/*
* First, try to find a CPLB that matches this address. If we
@@ -218,8 +219,8 @@ static noinline int icplb_miss(void)
* that the instruction crosses a page boundary.
*/
for (idx = first_switched_icplb; idx < MAX_CPLBS; idx++) {
- if (icplb_tbl[idx].data & CPLB_VALID) {
- unsigned long this_addr = icplb_tbl[idx].addr;
+ if (icplb_tbl[cpu][idx].data & CPLB_VALID) {
+ unsigned long this_addr = icplb_tbl[cpu][idx].addr;
if (this_addr <= addr && this_addr + PAGE_SIZE > addr) {
addr += PAGE_SIZE;
break;
@@ -257,23 +258,23 @@ static noinline int icplb_miss(void)
* Otherwise, check the x bitmap of the current process.
*/
if (!(status & FAULT_USERSUPV)) {
- unsigned long *mask = current_rwx_mask;
+ unsigned long *mask = current_rwx_mask[cpu];
if (mask) {
int page = addr >> PAGE_SHIFT;
- int offs = page >> 5;
+ int idx = page >> 5;
int bit = 1 << (page & 31);
mask += 2 * page_mask_nelts;
- if (mask[offs] & bit)
+ if (mask[idx] & bit)
i_data |= CPLB_USER_RD;
}
}
}
- idx = evict_one_icplb();
+ idx = evict_one_icplb(cpu);
addr &= PAGE_MASK;
- icplb_tbl[idx].addr = addr;
- icplb_tbl[idx].data = i_data;
+ icplb_tbl[cpu][idx].addr = addr;
+ icplb_tbl[cpu][idx].data = i_data;
disable_icplb();
bfin_write32(ICPLB_DATA0 + idx * 4, i_data);
@@ -283,19 +284,19 @@ static noinline int icplb_miss(void)
return 0;
}
-static noinline int dcplb_protection_fault(void)
+static noinline int dcplb_protection_fault(unsigned int cpu)
{
int status = bfin_read_DCPLB_STATUS();
- nr_dcplb_prot++;
+ nr_dcplb_prot[cpu]++;
if (status & FAULT_RW) {
int idx = faulting_cplb_index(status);
- unsigned long data = dcplb_tbl[idx].data;
+ unsigned long data = dcplb_tbl[cpu][idx].data;
if (!(data & CPLB_WT) && !(data & CPLB_DIRTY) &&
write_permitted(status, data)) {
data |= CPLB_DIRTY;
- dcplb_tbl[idx].data = data;
+ dcplb_tbl[cpu][idx].data = data;
bfin_write32(DCPLB_DATA0 + idx * 4, data);
return 0;
}
@@ -306,36 +307,37 @@ static noinline int dcplb_protection_fault(void)
int cplb_hdr(int seqstat, struct pt_regs *regs)
{
int cause = seqstat & 0x3f;
+ unsigned int cpu = smp_processor_id();
switch (cause) {
case 0x23:
- return dcplb_protection_fault();
+ return dcplb_protection_fault(cpu);
case 0x2C:
- return icplb_miss();
+ return icplb_miss(cpu);
case 0x26:
- return dcplb_miss();
+ return dcplb_miss(cpu);
default:
return 1;
}
}
-void flush_switched_cplbs(void)
+void flush_switched_cplbs(unsigned int cpu)
{
int i;
unsigned long flags;
- nr_cplb_flush++;
+ nr_cplb_flush[cpu]++;
local_irq_save(flags);
disable_icplb();
for (i = first_switched_icplb; i < MAX_CPLBS; i++) {
- icplb_tbl[i].data = 0;
+ icplb_tbl[cpu][i].data = 0;
bfin_write32(ICPLB_DATA0 + i * 4, 0);
}
enable_icplb();
disable_dcplb();
for (i = first_switched_dcplb; i < MAX_CPLBS; i++) {
- dcplb_tbl[i].data = 0;
+ dcplb_tbl[cpu][i].data = 0;
bfin_write32(DCPLB_DATA0 + i * 4, 0);
}
enable_dcplb();
@@ -343,7 +345,7 @@ void flush_switched_cplbs(void)
}
-void set_mask_dcplbs(unsigned long *masks)
+void set_mask_dcplbs(unsigned long *masks, unsigned int cpu)
{
int i;
unsigned long addr = (unsigned long)masks;
@@ -351,12 +353,12 @@ void set_mask_dcplbs(unsigned long *masks)
unsigned long flags;
if (!masks) {
- current_rwx_mask = masks;
+ current_rwx_mask[cpu] = masks;
return;
}
local_irq_save(flags);
- current_rwx_mask = masks;
+ current_rwx_mask[cpu] = masks;
d_data = CPLB_SUPV_WR | CPLB_VALID | CPLB_DIRTY | PAGE_SIZE_4KB;
#ifdef CONFIG_BFIN_DCACHE
@@ -368,8 +370,8 @@ void set_mask_dcplbs(unsigned long *masks)
disable_dcplb();
for (i = first_mask_dcplb; i < first_switched_dcplb; i++) {
- dcplb_tbl[i].addr = addr;
- dcplb_tbl[i].data = d_data;
+ dcplb_tbl[cpu][i].addr = addr;
+ dcplb_tbl[cpu][i].data = d_data;
bfin_write32(DCPLB_DATA0 + i * 4, d_data);
bfin_write32(DCPLB_ADDR0 + i * 4, addr);
addr += PAGE_SIZE;