Blackfin arch: SMP supporting patchset: Blackfin kernel and memory management 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 kernel and memory management code
Singed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
diff --git a/arch/blackfin/kernel/asm-offsets.c b/arch/blackfin/kernel/asm-offsets.c
index 9bb85dd..b5df945 100644
--- a/arch/blackfin/kernel/asm-offsets.c
+++ b/arch/blackfin/kernel/asm-offsets.c
@@ -56,6 +56,9 @@
/* offsets into the thread struct */
DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp));
DEFINE(THREAD_USP, offsetof(struct thread_struct, usp));
+ DEFINE(THREAD_SR, offsetof(struct thread_struct, seqstat));
+ DEFINE(PT_SR, offsetof(struct thread_struct, seqstat));
+ DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0));
DEFINE(THREAD_PC, offsetof(struct thread_struct, pc));
DEFINE(KERNEL_STACK_SIZE, THREAD_SIZE);
@@ -128,5 +131,31 @@
DEFINE(SIGSEGV, SIGSEGV);
DEFINE(SIGTRAP, SIGTRAP);
+ /* PDA management (in L1 scratchpad) */
+ DEFINE(PDA_SYSCFG, offsetof(struct blackfin_pda, syscfg));
+#ifdef CONFIG_SMP
+ DEFINE(PDA_IRQFLAGS, offsetof(struct blackfin_pda, imask));
+#endif
+ DEFINE(PDA_IPDT, offsetof(struct blackfin_pda, ipdt));
+ DEFINE(PDA_IPDT_SWAPCOUNT, offsetof(struct blackfin_pda, ipdt_swapcount));
+ DEFINE(PDA_DPDT, offsetof(struct blackfin_pda, dpdt));
+ DEFINE(PDA_DPDT_SWAPCOUNT, offsetof(struct blackfin_pda, dpdt_swapcount));
+ DEFINE(PDA_EXIPTR, offsetof(struct blackfin_pda, ex_iptr));
+ DEFINE(PDA_EXOPTR, offsetof(struct blackfin_pda, ex_optr));
+ DEFINE(PDA_EXBUF, offsetof(struct blackfin_pda, ex_buf));
+ DEFINE(PDA_EXIMASK, offsetof(struct blackfin_pda, ex_imask));
+ DEFINE(PDA_EXSTACK, offsetof(struct blackfin_pda, ex_stack));
+#ifdef ANOMALY_05000261
+ DEFINE(PDA_LFRETX, offsetof(struct blackfin_pda, last_cplb_fault_retx));
+#endif
+ DEFINE(PDA_DCPLB, offsetof(struct blackfin_pda, dcplb_fault_addr));
+ DEFINE(PDA_ICPLB, offsetof(struct blackfin_pda, icplb_fault_addr));
+ DEFINE(PDA_RETX, offsetof(struct blackfin_pda, retx));
+ DEFINE(PDA_SEQSTAT, offsetof(struct blackfin_pda, seqstat));
+#ifdef CONFIG_SMP
+ /* Inter-core lock (in L2 SRAM) */
+ DEFINE(SIZEOF_CORELOCK, sizeof(struct corelock_slot));
+#endif
+
return 0;
}
diff --git a/arch/blackfin/kernel/bfin_ksyms.c b/arch/blackfin/kernel/bfin_ksyms.c
index b66f1d4..763c315 100644
--- a/arch/blackfin/kernel/bfin_ksyms.c
+++ b/arch/blackfin/kernel/bfin_ksyms.c
@@ -68,3 +68,37 @@
EXPORT_SYMBOL(outsl);
EXPORT_SYMBOL(insl);
EXPORT_SYMBOL(insl_16);
+
+#ifdef CONFIG_SMP
+EXPORT_SYMBOL(__raw_atomic_update_asm);
+EXPORT_SYMBOL(__raw_atomic_clear_asm);
+EXPORT_SYMBOL(__raw_atomic_set_asm);
+EXPORT_SYMBOL(__raw_atomic_xor_asm);
+EXPORT_SYMBOL(__raw_atomic_test_asm);
+EXPORT_SYMBOL(__raw_xchg_1_asm);
+EXPORT_SYMBOL(__raw_xchg_2_asm);
+EXPORT_SYMBOL(__raw_xchg_4_asm);
+EXPORT_SYMBOL(__raw_cmpxchg_1_asm);
+EXPORT_SYMBOL(__raw_cmpxchg_2_asm);
+EXPORT_SYMBOL(__raw_cmpxchg_4_asm);
+EXPORT_SYMBOL(__raw_spin_is_locked_asm);
+EXPORT_SYMBOL(__raw_spin_lock_asm);
+EXPORT_SYMBOL(__raw_spin_trylock_asm);
+EXPORT_SYMBOL(__raw_spin_unlock_asm);
+EXPORT_SYMBOL(__raw_read_lock_asm);
+EXPORT_SYMBOL(__raw_read_trylock_asm);
+EXPORT_SYMBOL(__raw_read_unlock_asm);
+EXPORT_SYMBOL(__raw_write_lock_asm);
+EXPORT_SYMBOL(__raw_write_trylock_asm);
+EXPORT_SYMBOL(__raw_write_unlock_asm);
+EXPORT_SYMBOL(__raw_bit_set_asm);
+EXPORT_SYMBOL(__raw_bit_clear_asm);
+EXPORT_SYMBOL(__raw_bit_toggle_asm);
+EXPORT_SYMBOL(__raw_bit_test_asm);
+EXPORT_SYMBOL(__raw_bit_test_set_asm);
+EXPORT_SYMBOL(__raw_bit_test_clear_asm);
+EXPORT_SYMBOL(__raw_bit_test_toggle_asm);
+EXPORT_SYMBOL(__raw_uncached_fetch_asm);
+EXPORT_SYMBOL(__raw_smp_mark_barrier_asm);
+EXPORT_SYMBOL(__raw_smp_check_barrier_asm);
+#endif
diff --git a/arch/blackfin/kernel/entry.S b/arch/blackfin/kernel/entry.S
index faea88e..c0c3fe8 100644
--- a/arch/blackfin/kernel/entry.S
+++ b/arch/blackfin/kernel/entry.S
@@ -30,6 +30,7 @@
#include <linux/linkage.h>
#include <asm/thread_info.h>
#include <asm/errno.h>
+#include <asm/blackfin.h>
#include <asm/asm-offsets.h>
#include <asm/context.S>
diff --git a/arch/blackfin/kernel/irqchip.c b/arch/blackfin/kernel/irqchip.c
index 07402f5..9eebb78 100644
--- a/arch/blackfin/kernel/irqchip.c
+++ b/arch/blackfin/kernel/irqchip.c
@@ -36,7 +36,7 @@
#include <linux/irq.h>
#include <asm/trace.h>
-static unsigned long irq_err_count;
+static atomic_t irq_err_count;
static spinlock_t irq_controller_lock;
/*
@@ -48,7 +48,7 @@
void ack_bad_irq(unsigned int irq)
{
- irq_err_count += 1;
+ atomic_inc(&irq_err_count);
printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq);
}
EXPORT_SYMBOL(ack_bad_irq);
@@ -72,7 +72,7 @@
int show_interrupts(struct seq_file *p, void *v)
{
- int i = *(loff_t *) v;
+ int i = *(loff_t *) v, j;
struct irqaction *action;
unsigned long flags;
@@ -80,19 +80,20 @@
spin_lock_irqsave(&irq_desc[i].lock, flags);
action = irq_desc[i].action;
if (!action)
- goto unlock;
-
- seq_printf(p, "%3d: %10u ", i, kstat_irqs(i));
+ goto skip;
+ seq_printf(p, "%3d: ", i);
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+ seq_printf(p, " %8s", irq_desc[i].chip->name);
seq_printf(p, " %s", action->name);
for (action = action->next; action; action = action->next)
- seq_printf(p, ", %s", action->name);
+ seq_printf(p, " %s", action->name);
seq_putc(p, '\n');
- unlock:
+ skip:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
- } else if (i == NR_IRQS) {
- seq_printf(p, "Err: %10lu\n", irq_err_count);
- }
+ } else if (i == NR_IRQS)
+ seq_printf(p, "Err: %10u\n", atomic_read(&irq_err_count));
return 0;
}
@@ -101,7 +102,6 @@
* come via this function. Instead, they should provide their
* own 'handler'
*/
-
#ifdef CONFIG_DO_IRQ_L1
__attribute__((l1_text))
#endif
diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c
index b795a20..ab40221 100644
--- a/arch/blackfin/kernel/kgdb.c
+++ b/arch/blackfin/kernel/kgdb.c
@@ -363,12 +363,12 @@
void kgdb_roundup_cpus(unsigned long flags)
{
- smp_call_function(kgdb_passive_cpu_callback, NULL, 0, 0);
+ smp_call_function(kgdb_passive_cpu_callback, NULL, 0);
}
void kgdb_roundup_cpu(int cpu, unsigned long flags)
{
- smp_call_function_single(cpu, kgdb_passive_cpu_callback, NULL, 0, 0);
+ smp_call_function_single(cpu, kgdb_passive_cpu_callback, NULL, 0);
}
#endif
diff --git a/arch/blackfin/kernel/module.c b/arch/blackfin/kernel/module.c
index e1bebc8..2e14cad 100644
--- a/arch/blackfin/kernel/module.c
+++ b/arch/blackfin/kernel/module.c
@@ -343,7 +343,13 @@
pr_debug("location is %x, value is %x type is %d \n",
(unsigned int) location32, value,
ELF32_R_TYPE(rel[i].r_info));
-
+#ifdef CONFIG_SMP
+ if ((unsigned long)location16 >= COREB_L1_DATA_A_START) {
+ printk(KERN_ERR "module %s: cannot relocate in L1: %u (SMP kernel)",
+ mod->name, ELF32_R_TYPE(rel[i].r_info));
+ return -ENOEXEC;
+ }
+#endif
switch (ELF32_R_TYPE(rel[i].r_info)) {
case R_pcrel24:
@@ -436,6 +442,7 @@
{
unsigned int i, strindex = 0, symindex = 0;
char *secstrings;
+ long err = 0;
secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
@@ -460,8 +467,10 @@
(strcmp(".rela.l1.text", secstrings + sechdrs[i].sh_name) == 0) ||
((strcmp(".rela.text", secstrings + sechdrs[i].sh_name) == 0) &&
(hdr->e_flags & (EF_BFIN_CODE_IN_L1|EF_BFIN_CODE_IN_L2))))) {
- apply_relocate_add((Elf_Shdr *) sechdrs, strtab,
+ err = apply_relocate_add((Elf_Shdr *) sechdrs, strtab,
symindex, i, mod);
+ if (err < 0)
+ return -ENOEXEC;
}
}
return 0;
diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
index 326e301..4359ea2 100644
--- a/arch/blackfin/kernel/process.c
+++ b/arch/blackfin/kernel/process.c
@@ -171,6 +171,13 @@
unsigned long clone_flags;
unsigned long newsp;
+#ifdef __ARCH_SYNC_CORE_DCACHE
+ if (current->rt.nr_cpus_allowed == num_possible_cpus()) {
+ current->cpus_allowed = cpumask_of_cpu(smp_processor_id());
+ current->rt.nr_cpus_allowed = 1;
+ }
+#endif
+
/* syscall2 puts clone_flags in r0 and usp in r1 */
clone_flags = regs->r0;
newsp = regs->r1;
@@ -338,22 +345,22 @@
if (addr >= (unsigned long)__init_begin &&
addr + size <= (unsigned long)__init_end)
return 1;
- if (addr >= L1_SCRATCH_START
- && addr + size <= L1_SCRATCH_START + L1_SCRATCH_LENGTH)
+ if (addr >= get_l1_scratch_start()
+ && addr + size <= get_l1_scratch_start() + L1_SCRATCH_LENGTH)
return 1;
#if L1_CODE_LENGTH != 0
- if (addr >= L1_CODE_START + (_etext_l1 - _stext_l1)
- && addr + size <= L1_CODE_START + L1_CODE_LENGTH)
+ if (addr >= get_l1_code_start() + (_etext_l1 - _stext_l1)
+ && addr + size <= get_l1_code_start() + L1_CODE_LENGTH)
return 1;
#endif
#if L1_DATA_A_LENGTH != 0
- if (addr >= L1_DATA_A_START + (_ebss_l1 - _sdata_l1)
- && addr + size <= L1_DATA_A_START + L1_DATA_A_LENGTH)
+ if (addr >= get_l1_data_a_start() + (_ebss_l1 - _sdata_l1)
+ && addr + size <= get_l1_data_a_start() + L1_DATA_A_LENGTH)
return 1;
#endif
#if L1_DATA_B_LENGTH != 0
- if (addr >= L1_DATA_B_START + (_ebss_b_l1 - _sdata_b_l1)
- && addr + size <= L1_DATA_B_START + L1_DATA_B_LENGTH)
+ if (addr >= get_l1_data_b_start() + (_ebss_b_l1 - _sdata_b_l1)
+ && addr + size <= get_l1_data_b_start() + L1_DATA_B_LENGTH)
return 1;
#endif
#if L2_LENGTH != 0
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index 140bf00..4de44f3 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -220,8 +220,8 @@
break;
pr_debug("ptrace: user address is valid\n");
- if (L1_CODE_LENGTH != 0 && addr >= L1_CODE_START
- && addr + sizeof(tmp) <= L1_CODE_START + L1_CODE_LENGTH) {
+ if (L1_CODE_LENGTH != 0 && addr >= get_l1_code_start()
+ && addr + sizeof(tmp) <= get_l1_code_start() + L1_CODE_LENGTH) {
safe_dma_memcpy (&tmp, (const void *)(addr), sizeof(tmp));
copied = sizeof(tmp);
@@ -300,8 +300,8 @@
break;
pr_debug("ptrace: user address is valid\n");
- if (L1_CODE_LENGTH != 0 && addr >= L1_CODE_START
- && addr + sizeof(data) <= L1_CODE_START + L1_CODE_LENGTH) {
+ if (L1_CODE_LENGTH != 0 && addr >= get_l1_code_start()
+ && addr + sizeof(data) <= get_l1_code_start() + L1_CODE_LENGTH) {
safe_dma_memcpy ((void *)(addr), &data, sizeof(data));
copied = sizeof(data);
diff --git a/arch/blackfin/kernel/reboot.c b/arch/blackfin/kernel/reboot.c
index ae97ca4..eeee8cb 100644
--- a/arch/blackfin/kernel/reboot.c
+++ b/arch/blackfin/kernel/reboot.c
@@ -21,7 +21,7 @@
* the core reset.
*/
__attribute__((l1_text))
-static void bfin_reset(void)
+static void _bfin_reset(void)
{
/* Wait for completion of "system" events such as cache line
* line fills so that we avoid infinite stalls later on as
@@ -66,6 +66,18 @@
}
}
+static void bfin_reset(void)
+{
+ if (ANOMALY_05000353 || ANOMALY_05000386)
+ _bfin_reset();
+ else
+ /* the bootrom checks to see how it was reset and will
+ * automatically perform a software reset for us when
+ * it starts executing boot
+ */
+ asm("raise 1;");
+}
+
__attribute__((weak))
void native_machine_restart(char *cmd)
{
@@ -75,14 +87,10 @@
{
native_machine_restart(cmd);
local_irq_disable();
- if (ANOMALY_05000353 || ANOMALY_05000386)
- bfin_reset();
+ if (smp_processor_id())
+ smp_call_function((void *)bfin_reset, 0, 1);
else
- /* the bootrom checks to see how it was reset and will
- * automatically perform a software reset for us when
- * it starts executing boot
- */
- asm("raise 1;");
+ bfin_reset();
}
__attribute__((weak))
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index 71a9a8c..c644d23 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -26,11 +26,10 @@
#include <asm/blackfin.h>
#include <asm/cplbinit.h>
#include <asm/div64.h>
+#include <asm/cpu.h>
#include <asm/fixed_code.h>
#include <asm/early_printk.h>
-static DEFINE_PER_CPU(struct cpu, cpu_devices);
-
u16 _bfin_swrst;
EXPORT_SYMBOL(_bfin_swrst);
@@ -79,29 +78,76 @@
static struct bfin_memmap_entry *overlap_list[BFIN_MEMMAP_MAX] __initdata;
static struct bfin_memmap_entry new_map[BFIN_MEMMAP_MAX] __initdata;
-void __init bfin_cache_init(void)
-{
+DEFINE_PER_CPU(struct blackfin_cpudata, cpu_data);
+
#if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
- generate_cplb_tables();
+void __init generate_cplb_tables(void)
+{
+ unsigned int cpu;
+
+ /* Generate per-CPU I&D CPLB tables */
+ for (cpu = 0; cpu < num_possible_cpus(); ++cpu)
+ generate_cplb_tables_cpu(cpu);
+}
#endif
+void __cpuinit bfin_setup_caches(unsigned int cpu)
+{
#ifdef CONFIG_BFIN_ICACHE
- bfin_icache_init();
- printk(KERN_INFO "Instruction Cache Enabled\n");
+#ifdef CONFIG_MPU
+ bfin_icache_init(icplb_tbl[cpu]);
+#else
+ bfin_icache_init(icplb_tables[cpu]);
+#endif
#endif
#ifdef CONFIG_BFIN_DCACHE
- bfin_dcache_init();
- printk(KERN_INFO "Data Cache Enabled"
+#ifdef CONFIG_MPU
+ bfin_dcache_init(dcplb_tbl[cpu]);
+#else
+ bfin_dcache_init(dcplb_tables[cpu]);
+#endif
+#endif
+
+ /*
+ * In cache coherence emulation mode, we need to have the
+ * D-cache enabled before running any atomic operation which
+ * might invove cache invalidation (i.e. spinlock, rwlock).
+ * So printk's are deferred until then.
+ */
+#ifdef CONFIG_BFIN_ICACHE
+ printk(KERN_INFO "Instruction Cache Enabled for CPU%u\n", cpu);
+#endif
+#ifdef CONFIG_BFIN_DCACHE
+ printk(KERN_INFO "Data Cache Enabled for CPU%u"
# if defined CONFIG_BFIN_WB
" (write-back)"
# elif defined CONFIG_BFIN_WT
" (write-through)"
# endif
- "\n");
+ "\n", cpu);
#endif
}
+void __cpuinit bfin_setup_cpudata(unsigned int cpu)
+{
+ struct blackfin_cpudata *cpudata = &per_cpu(cpu_data, cpu);
+
+ cpudata->idle = current;
+ cpudata->loops_per_jiffy = loops_per_jiffy;
+ cpudata->cclk = get_cclk();
+ cpudata->imemctl = bfin_read_IMEM_CONTROL();
+ cpudata->dmemctl = bfin_read_DMEM_CONTROL();
+}
+
+void __init bfin_cache_init(void)
+{
+#if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
+ generate_cplb_tables();
+#endif
+ bfin_setup_caches(0);
+}
+
void __init bfin_relocate_l1_mem(void)
{
unsigned long l1_code_length;
@@ -230,7 +276,7 @@
/* record all known change-points (starting and ending addresses),
omitting those that are for empty memory regions */
chgidx = 0;
- for (i = 0; i < old_nr; i++) {
+ for (i = 0; i < old_nr; i++) {
if (map[i].size != 0) {
change_point[chgidx]->addr = map[i].addr;
change_point[chgidx++]->pentry = &map[i];
@@ -238,13 +284,13 @@
change_point[chgidx++]->pentry = &map[i];
}
}
- chg_nr = chgidx; /* true number of change-points */
+ chg_nr = chgidx; /* true number of change-points */
/* sort change-point list by memory addresses (low -> high) */
still_changing = 1;
- while (still_changing) {
+ while (still_changing) {
still_changing = 0;
- for (i = 1; i < chg_nr; i++) {
+ for (i = 1; i < chg_nr; i++) {
/* if <current_addr> > <last_addr>, swap */
/* or, if current=<start_addr> & last=<end_addr>, swap */
if ((change_point[i]->addr < change_point[i-1]->addr) ||
@@ -261,10 +307,10 @@
}
/* create a new memmap, removing overlaps */
- overlap_entries = 0; /* number of entries in the overlap table */
- new_entry = 0; /* index for creating new memmap entries */
- last_type = 0; /* start with undefined memory type */
- last_addr = 0; /* start with 0 as last starting address */
+ overlap_entries = 0; /* number of entries in the overlap table */
+ new_entry = 0; /* index for creating new memmap entries */
+ last_type = 0; /* start with undefined memory type */
+ last_addr = 0; /* start with 0 as last starting address */
/* loop through change-points, determining affect on the new memmap */
for (chgidx = 0; chgidx < chg_nr; chgidx++) {
/* keep track of all overlapping memmap entries */
@@ -286,14 +332,14 @@
if (overlap_list[i]->type > current_type)
current_type = overlap_list[i]->type;
/* continue building up new memmap based on this information */
- if (current_type != last_type) {
+ if (current_type != last_type) {
if (last_type != 0) {
new_map[new_entry].size =
change_point[chgidx]->addr - last_addr;
/* move forward only if the new size was non-zero */
if (new_map[new_entry].size != 0)
if (++new_entry >= BFIN_MEMMAP_MAX)
- break; /* no more space left for new entries */
+ break; /* no more space left for new entries */
}
if (current_type != 0) {
new_map[new_entry].addr = change_point[chgidx]->addr;
@@ -303,9 +349,9 @@
last_type = current_type;
}
}
- new_nr = new_entry; /* retain count for new entries */
+ new_nr = new_entry; /* retain count for new entries */
- /* copy new mapping into original location */
+ /* copy new mapping into original location */
memcpy(map, new_map, new_nr*sizeof(struct bfin_memmap_entry));
*pnr_map = new_nr;
@@ -361,7 +407,6 @@
* - "memmap=XXX[KkmM][@][$]XXX[KkmM]" defines a memory region
* @ from <start> to <start>+<mem>, type RAM
* $ from <start> to <start>+<mem>, type RESERVED
- *
*/
static __init void parse_cmdline_early(char *cmdline_p)
{
@@ -383,12 +428,10 @@
if (*to != ' ') {
if (*to == '$'
|| *(to + 1) == '$')
- reserved_mem_dcache_on =
- 1;
+ reserved_mem_dcache_on = 1;
if (*to == '#'
|| *(to + 1) == '#')
- reserved_mem_icache_on =
- 1;
+ reserved_mem_icache_on = 1;
}
}
} else if (!memcmp(to, "earlyprintk=", 12)) {
@@ -417,9 +460,8 @@
* [_ramend - DMA_UNCACHED_REGION,
* _ramend]: uncached DMA region
* [_ramend, physical_mem_end]: memory not managed by kernel
- *
*/
-static __init void memory_setup(void)
+static __init void memory_setup(void)
{
#ifdef CONFIG_MTD_UCLINUX
unsigned long mtd_phys = 0;
@@ -436,7 +478,7 @@
memory_end = _ramend - DMA_UNCACHED_REGION;
#ifdef CONFIG_MPU
- /* Round up to multiple of 4MB. */
+ /* Round up to multiple of 4MB */
memory_start = (_ramstart + 0x3fffff) & ~0x3fffff;
#else
memory_start = PAGE_ALIGN(_ramstart);
@@ -616,7 +658,7 @@
end_pfn = memory_end >> PAGE_SHIFT;
/*
- * give all the memory to the bootmap allocator, tell it to put the
+ * give all the memory to the bootmap allocator, tell it to put the
* boot mem_map at the start of memory.
*/
bootmap_size = init_bootmem_node(NODE_DATA(0),
@@ -791,7 +833,11 @@
bfin_write_SWRST(_bfin_swrst | DOUBLE_FAULT);
#endif
+#ifdef CONFIG_SMP
+ if (_bfin_swrst & SWRST_DBL_FAULT_A) {
+#else
if (_bfin_swrst & RESET_DOUBLE) {
+#endif
printk(KERN_EMERG "Recovering from DOUBLE FAULT event\n");
#ifdef CONFIG_DEBUG_DOUBLEFAULT
/* We assume the crashing kernel, and the current symbol table match */
@@ -835,7 +881,7 @@
printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
- cclk / 1000000, sclk / 1000000);
+ cclk / 1000000, sclk / 1000000);
if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
@@ -867,18 +913,21 @@
BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
!= SAFE_USER_INSTRUCTION - FIXED_CODE_START);
+#ifdef CONFIG_SMP
+ platform_init_cpus();
+#endif
init_exception_vectors();
- bfin_cache_init();
+ bfin_cache_init(); /* Initialize caches for the boot CPU */
}
static int __init topology_init(void)
{
- int cpu;
+ unsigned int cpu;
+ /* Record CPU-private information for the boot processor. */
+ bfin_setup_cpudata(0);
for_each_possible_cpu(cpu) {
- struct cpu *c = &per_cpu(cpu_devices, cpu);
-
- register_cpu(c, cpu);
+ register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu);
}
return 0;
@@ -983,15 +1032,15 @@
char *cpu, *mmu, *fpu, *vendor, *cache;
uint32_t revid;
- u_long cclk = 0, sclk = 0;
+ u_long sclk = 0;
u_int icache_size = BFIN_ICACHESIZE / 1024, dcache_size = 0, dsup_banks = 0;
+ struct blackfin_cpudata *cpudata = &per_cpu(cpu_data, *(unsigned int *)v);
cpu = CPU;
mmu = "none";
fpu = "none";
revid = bfin_revid();
- cclk = get_cclk();
sclk = get_sclk();
switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
@@ -1003,10 +1052,8 @@
break;
}
- seq_printf(m, "processor\t: %d\n"
- "vendor_id\t: %s\n",
- *(unsigned int *)v,
- vendor);
+ seq_printf(m, "processor\t: %d\n" "vendor_id\t: %s\n",
+ *(unsigned int *)v, vendor);
if (CPUID == bfin_cpuid())
seq_printf(m, "cpu family\t: 0x%04x\n", CPUID);
@@ -1016,7 +1063,7 @@
seq_printf(m, "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n"
"stepping\t: %d\n",
- cpu, cclk/1000000, sclk/1000000,
+ cpu, cpudata->cclk/1000000, sclk/1000000,
#ifdef CONFIG_MPU
"mpu on",
#else
@@ -1025,16 +1072,16 @@
revid);
seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
- cclk/1000000, cclk%1000000,
+ cpudata->cclk/1000000, cpudata->cclk%1000000,
sclk/1000000, sclk%1000000);
seq_printf(m, "bogomips\t: %lu.%02lu\n"
"Calibration\t: %lu loops\n",
- (loops_per_jiffy * HZ) / 500000,
- ((loops_per_jiffy * HZ) / 5000) % 100,
- (loops_per_jiffy * HZ));
+ (cpudata->loops_per_jiffy * HZ) / 500000,
+ ((cpudata->loops_per_jiffy * HZ) / 5000) % 100,
+ (cpudata->loops_per_jiffy * HZ));
/* Check Cache configutation */
- switch (bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
+ switch (cpudata->dmemctl & (1 << DMC0_P | 1 << DMC1_P)) {
case ACACHE_BSRAM:
cache = "dbank-A/B\t: cache/sram";
dcache_size = 16;
@@ -1058,10 +1105,10 @@
}
/* Is it turned on? */
- if ((bfin_read_DMEM_CONTROL() & (ENDCPLB | DMC_ENABLE)) != (ENDCPLB | DMC_ENABLE))
+ if ((cpudata->dmemctl & (ENDCPLB | DMC_ENABLE)) != (ENDCPLB | DMC_ENABLE))
dcache_size = 0;
- if ((bfin_read_IMEM_CONTROL() & (IMC | ENICPLB)) != (IMC | ENICPLB))
+ if ((cpudata->imemctl & (IMC | ENICPLB)) != (IMC | ENICPLB))
icache_size = 0;
seq_printf(m, "cache size\t: %d KB(L1 icache) "
@@ -1086,8 +1133,13 @@
"dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
BFIN_DLINES);
+#ifdef __ARCH_SYNC_CORE_DCACHE
+ seq_printf(m,
+ "SMP Dcache Flushes\t: %lu\n\n",
+ per_cpu(cpu_data, *(unsigned int *)v).dcache_invld_count);
+#endif
#ifdef CONFIG_BFIN_ICACHE_LOCK
- switch ((bfin_read_IMEM_CONTROL() >> 3) & WAYALL_L) {
+ switch ((cpudata->imemctl >> 3) & WAYALL_L) {
case WAY0_L:
seq_printf(m, "Way0 Locked-Down\n");
break;
@@ -1137,6 +1189,12 @@
seq_printf(m, "No Ways are locked\n");
}
#endif
+ if (*(unsigned int *)v != NR_CPUS-1)
+ return 0;
+
+#if L2_LENGTH
+ seq_printf(m, "L2 SRAM\t\t: %dKB\n", L2_LENGTH/0x400);
+#endif
seq_printf(m, "board name\t: %s\n", bfin_board_name);
seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
@@ -1144,6 +1202,7 @@
((int)memory_end - (int)_stext) >> 10,
_stext,
(void *)memory_end);
+ seq_printf(m, "\n");
return 0;
}
diff --git a/arch/blackfin/kernel/time.c b/arch/blackfin/kernel/time.c
index eb23523..06de2ce 100644
--- a/arch/blackfin/kernel/time.c
+++ b/arch/blackfin/kernel/time.c
@@ -34,9 +34,11 @@
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/irq.h>
+#include <linux/delay.h>
#include <asm/blackfin.h>
#include <asm/time.h>
+#include <asm/gptimers.h>
/* This is an NTP setting */
#define TICK_SIZE (tick_nsec / 1000)
@@ -46,11 +48,14 @@
static struct irqaction bfin_timer_irq = {
.name = "BFIN Timer Tick",
+#ifdef CONFIG_IRQ_PER_CPU
+ .flags = IRQF_DISABLED | IRQF_PERCPU,
+#else
.flags = IRQF_DISABLED
+#endif
};
-static void
-time_sched_init(irq_handler_t timer_routine)
+void setup_core_timer(void)
{
u32 tcount;
@@ -71,12 +76,41 @@
CSYNC();
bfin_write_TCNTL(7);
+}
+#ifdef CONFIG_TICK_SOURCE_SYSTMR0
+void setup_system_timer0(void)
+{
+ /* Power down the core timer, just to play safe. */
+ bfin_write_TCNTL(0);
+
+ disable_gptimers(TIMER0bit);
+ set_gptimer_status(0, TIMER_STATUS_TRUN0);
+ while (get_gptimer_status(0) & TIMER_STATUS_TRUN0)
+ udelay(10);
+
+ set_gptimer_config(0, 0x59); /* IRQ enable, periodic, PWM_OUT, SCLKed, OUT PAD disabled */
+ set_gptimer_period(TIMER0_id, get_sclk() / HZ);
+ set_gptimer_pwidth(TIMER0_id, 1);
+ SSYNC();
+ enable_gptimers(TIMER0bit);
+}
+#endif
+
+static void
+time_sched_init(irqreturn_t(*timer_routine) (int, void *))
+{
+#ifdef CONFIG_TICK_SOURCE_SYSTMR0
+ setup_system_timer0();
+#else
+ setup_core_timer();
+#endif
bfin_timer_irq.handler = (irq_handler_t)timer_routine;
- /* call setup_irq instead of request_irq because request_irq calls
- * kmalloc which has not been initialized yet
- */
+#ifdef CONFIG_TICK_SOURCE_SYSTMR0
+ setup_irq(IRQ_TIMER0, &bfin_timer_irq);
+#else
setup_irq(IRQ_CORETMR, &bfin_timer_irq);
+#endif
}
/*
@@ -87,17 +121,23 @@
unsigned long offset;
unsigned long clocks_per_jiffy;
+#ifdef CONFIG_TICK_SOURCE_SYSTMR0
+ clocks_per_jiffy = bfin_read_TIMER0_PERIOD();
+ offset = bfin_read_TIMER0_COUNTER() / \
+ (((clocks_per_jiffy + 1) * HZ) / USEC_PER_SEC);
+
+ if ((get_gptimer_status(0) & TIMER_STATUS_TIMIL0) && offset < (100000 / HZ / 2))
+ offset += (USEC_PER_SEC / HZ);
+#else
clocks_per_jiffy = bfin_read_TPERIOD();
- offset =
- (clocks_per_jiffy -
- bfin_read_TCOUNT()) / (((clocks_per_jiffy + 1) * HZ) /
- USEC_PER_SEC);
+ offset = (clocks_per_jiffy - bfin_read_TCOUNT()) / \
+ (((clocks_per_jiffy + 1) * HZ) / USEC_PER_SEC);
/* Check if we just wrapped the counters and maybe missed a tick */
if ((bfin_read_ILAT() & (1 << IRQ_CORETMR))
- && (offset < (100000 / HZ / 2)))
+ && (offset < (100000 / HZ / 2)))
offset += (USEC_PER_SEC / HZ);
-
+#endif
return offset;
}
@@ -120,34 +160,38 @@
static long last_rtc_update;
write_seqlock(&xtime_lock);
+#ifdef CONFIG_TICK_SOURCE_SYSTMR0
+ if (get_gptimer_status(0) & TIMER_STATUS_TIMIL0) {
+#endif
+ do_timer(1);
- do_timer(1);
- profile_tick(CPU_PROFILING);
+ /*
+ * If we have an externally synchronized Linux clock, then update
+ * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
+ * called as close as possible to 500 ms before the new second starts.
+ */
- /*
- * If we have an externally synchronized Linux clock, then update
- * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
- * called as close as possible to 500 ms before the new second starts.
- */
-
- if (ntp_synced() &&
- xtime.tv_sec > last_rtc_update + 660 &&
- (xtime.tv_nsec / NSEC_PER_USEC) >=
- 500000 - ((unsigned)TICK_SIZE) / 2
- && (xtime.tv_nsec / NSEC_PER_USEC) <=
- 500000 + ((unsigned)TICK_SIZE) / 2) {
- if (set_rtc_mmss(xtime.tv_sec) == 0)
- last_rtc_update = xtime.tv_sec;
- else
- /* Do it again in 60s. */
- last_rtc_update = xtime.tv_sec - 600;
+ if (ntp_synced() &&
+ xtime.tv_sec > last_rtc_update + 660 &&
+ (xtime.tv_nsec / NSEC_PER_USEC) >=
+ 500000 - ((unsigned)TICK_SIZE) / 2
+ && (xtime.tv_nsec / NSEC_PER_USEC) <=
+ 500000 + ((unsigned)TICK_SIZE) / 2) {
+ if (set_rtc_mmss(xtime.tv_sec) == 0)
+ last_rtc_update = xtime.tv_sec;
+ else
+ /* Do it again in 60s. */
+ last_rtc_update = xtime.tv_sec - 600;
+ }
+#ifdef CONFIG_TICK_SOURCE_SYSTMR0
+ set_gptimer_status(0, TIMER_STATUS_TIMIL0);
}
+#endif
write_sequnlock(&xtime_lock);
-#ifndef CONFIG_SMP
update_process_times(user_mode(get_irq_regs()));
-#endif
+ profile_tick(CPU_PROFILING);
return IRQ_HANDLED;
}
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index bef025b..af7cc43 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -75,16 +75,6 @@
CSYNC();
}
-/*
- * Used to save the RETX, SEQSTAT, I/D CPLB FAULT ADDR
- * values across the transition from exception to IRQ5.
- * We put these in L1, so they are going to be in a valid
- * location during exception context
- */
-__attribute__((l1_data))
-unsigned long saved_retx, saved_seqstat,
- saved_icplb_fault_addr, saved_dcplb_fault_addr;
-
static void decode_address(char *buf, unsigned long address)
{
#ifdef CONFIG_DEBUG_VERBOSE
@@ -211,18 +201,18 @@
printk(KERN_EMERG "\n" KERN_EMERG "Double Fault\n");
#ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT
if (((long)fp->seqstat & SEQSTAT_EXCAUSE) == VEC_UNCOV) {
+ unsigned int cpu = smp_processor_id();
char buf[150];
- decode_address(buf, saved_retx);
+ decode_address(buf, cpu_pda[cpu].retx);
printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n",
- (int)saved_seqstat & SEQSTAT_EXCAUSE, buf);
- decode_address(buf, saved_dcplb_fault_addr);
+ (unsigned int)cpu_pda[cpu].seqstat & SEQSTAT_EXCAUSE, buf);
+ decode_address(buf, cpu_pda[cpu].dcplb_fault_addr);
printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %s\n", buf);
- decode_address(buf, saved_icplb_fault_addr);
+ decode_address(buf, cpu_pda[cpu].icplb_fault_addr);
printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %s\n", buf);
decode_address(buf, fp->retx);
- printk(KERN_NOTICE "The instruction at %s caused a double exception\n",
- buf);
+ printk(KERN_NOTICE "The instruction at %s caused a double exception\n", buf);
} else
#endif
{
@@ -240,6 +230,9 @@
#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
int j;
#endif
+#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
+ unsigned int cpu = smp_processor_id();
+#endif
int sig = 0;
siginfo_t info;
unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE;
@@ -417,7 +410,7 @@
info.si_code = ILL_CPLB_MULHIT;
sig = SIGSEGV;
#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
- if (saved_dcplb_fault_addr < FIXED_CODE_START)
+ if (cpu_pda[cpu].dcplb_fault_addr < FIXED_CODE_START)
verbose_printk(KERN_NOTICE "NULL pointer access\n");
else
#endif
@@ -471,7 +464,7 @@
info.si_code = ILL_CPLB_MULHIT;
sig = SIGSEGV;
#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
- if (saved_icplb_fault_addr < FIXED_CODE_START)
+ if (cpu_pda[cpu].icplb_fault_addr < FIXED_CODE_START)
verbose_printk(KERN_NOTICE "Jump to NULL address\n");
else
#endif
@@ -960,6 +953,7 @@
else
verbose_printk(KERN_NOTICE "COMM= invalid\n");
+ printk(KERN_NOTICE "CPU = %d\n", current_thread_info()->cpu);
if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START)
verbose_printk(KERN_NOTICE "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n"
KERN_NOTICE " BSS = 0x%p-0x%p USER-STACK = 0x%p\n"
@@ -1053,6 +1047,7 @@
struct irqaction *action;
unsigned int i;
unsigned long flags;
+ unsigned int cpu = smp_processor_id();
verbose_printk(KERN_NOTICE "\n" KERN_NOTICE "SEQUENCER STATUS:\t\t%s\n", print_tainted());
verbose_printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx SYSCFG: %04lx\n",
@@ -1112,9 +1107,9 @@
if (((long)fp->seqstat & SEQSTAT_EXCAUSE) &&
(((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) {
- decode_address(buf, saved_dcplb_fault_addr);
+ decode_address(buf, cpu_pda[cpu].dcplb_fault_addr);
verbose_printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf);
- decode_address(buf, saved_icplb_fault_addr);
+ decode_address(buf, cpu_pda[cpu].icplb_fault_addr);
verbose_printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf);
}
@@ -1153,20 +1148,21 @@
asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text));
#endif
-asmlinkage int sys_bfin_spinlock(int *spinlock)
-{
- int ret = 0;
- int tmp = 0;
+static DEFINE_SPINLOCK(bfin_spinlock_lock);
- local_irq_disable();
- ret = get_user(tmp, spinlock);
- if (ret == 0) {
- if (tmp)
+asmlinkage int sys_bfin_spinlock(int *p)
+{
+ int ret, tmp = 0;
+
+ spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */
+ ret = get_user(tmp, p);
+ if (likely(ret == 0)) {
+ if (unlikely(tmp))
ret = 1;
- tmp = 1;
- put_user(tmp, spinlock);
+ else
+ put_user(1, p);
}
- local_irq_enable();
+ spin_unlock(&bfin_spinlock_lock);
return ret;
}
diff --git a/arch/blackfin/mm/init.c b/arch/blackfin/mm/init.c
index bc240ab..57d306b 100644
--- a/arch/blackfin/mm/init.c
+++ b/arch/blackfin/mm/init.c
@@ -31,7 +31,8 @@
#include <linux/bootmem.h>
#include <linux/uaccess.h>
#include <asm/bfin-global.h>
-#include <asm/l1layout.h>
+#include <asm/pda.h>
+#include <asm/cplbinit.h>
#include "blackfin_sram.h"
/*
@@ -53,6 +54,11 @@
unsigned long empty_zero_page;
+extern unsigned long exception_stack[NR_CPUS][1024];
+
+struct blackfin_pda cpu_pda[NR_CPUS];
+EXPORT_SYMBOL(cpu_pda);
+
/*
* paging_init() continues the virtual memory environment setup which
* was begun by the code in arch/head.S.
@@ -98,6 +104,42 @@
}
}
+asmlinkage void init_pda(void)
+{
+ unsigned int cpu = raw_smp_processor_id();
+
+ /* Initialize the PDA fields holding references to other parts
+ of the memory. The content of such memory is still
+ undefined at the time of the call, we are only setting up
+ valid pointers to it. */
+ memset(&cpu_pda[cpu], 0, sizeof(cpu_pda[cpu]));
+
+ cpu_pda[0].next = &cpu_pda[1];
+ cpu_pda[1].next = &cpu_pda[0];
+
+ 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
+}
+
+void __cpuinit reserve_pda(void)
+{
+ printk(KERN_INFO "PDA for CPU%u reserved at %p\n", smp_processor_id(),
+ &cpu_pda[smp_processor_id()]);
+}
+
void __init mem_init(void)
{
unsigned int codek = 0, datak = 0, initk = 0;
@@ -141,21 +183,13 @@
static int __init sram_init(void)
{
- unsigned long tmp;
-
/* Initialize the blackfin L1 Memory. */
bfin_sram_init();
- /* Allocate this once; never free it. We assume this gives us a
- pointer to the start of L1 scratchpad memory; panic if it
- doesn't. */
- tmp = (unsigned long)l1sram_alloc(sizeof(struct l1_scratch_task_info));
- if (tmp != (unsigned long)L1_SCRATCH_TASK_INFO) {
- printk(KERN_EMERG "mem_init(): Did not get the right address from l1sram_alloc: %08lx != %08lx\n",
- tmp, (unsigned long)L1_SCRATCH_TASK_INFO);
- panic("No L1, time to give up\n");
- }
-
+ /* Reserve the PDA space for the boot CPU right after we
+ * initialized the scratch memory allocator.
+ */
+ reserve_pda();
return 0;
}
pure_initcall(sram_init);
diff --git a/arch/blackfin/mm/sram-alloc.c b/arch/blackfin/mm/sram-alloc.c
index cc6f336..8f82b4c 100644
--- a/arch/blackfin/mm/sram-alloc.c
+++ b/arch/blackfin/mm/sram-alloc.c
@@ -41,8 +41,10 @@
#include <asm/blackfin.h>
#include "blackfin_sram.h"
-static spinlock_t l1sram_lock, l1_data_sram_lock, l1_inst_sram_lock;
-static spinlock_t l2_sram_lock;
+static DEFINE_PER_CPU(spinlock_t, l1sram_lock) ____cacheline_aligned_in_smp;
+static DEFINE_PER_CPU(spinlock_t, l1_data_sram_lock) ____cacheline_aligned_in_smp;
+static DEFINE_PER_CPU(spinlock_t, l1_inst_sram_lock) ____cacheline_aligned_in_smp;
+static spinlock_t l2_sram_lock ____cacheline_aligned_in_smp;
/* the data structure for L1 scratchpad and DATA SRAM */
struct sram_piece {
@@ -52,18 +54,22 @@
struct sram_piece *next;
};
-static struct sram_piece free_l1_ssram_head, used_l1_ssram_head;
+static DEFINE_PER_CPU(struct sram_piece, free_l1_ssram_head);
+static DEFINE_PER_CPU(struct sram_piece, used_l1_ssram_head);
#if L1_DATA_A_LENGTH != 0
-static struct sram_piece free_l1_data_A_sram_head, used_l1_data_A_sram_head;
+static DEFINE_PER_CPU(struct sram_piece, free_l1_data_A_sram_head);
+static DEFINE_PER_CPU(struct sram_piece, used_l1_data_A_sram_head);
#endif
#if L1_DATA_B_LENGTH != 0
-static struct sram_piece free_l1_data_B_sram_head, used_l1_data_B_sram_head;
+static DEFINE_PER_CPU(struct sram_piece, free_l1_data_B_sram_head);
+static DEFINE_PER_CPU(struct sram_piece, used_l1_data_B_sram_head);
#endif
#if L1_CODE_LENGTH != 0
-static struct sram_piece free_l1_inst_sram_head, used_l1_inst_sram_head;
+static DEFINE_PER_CPU(struct sram_piece, free_l1_inst_sram_head);
+static DEFINE_PER_CPU(struct sram_piece, used_l1_inst_sram_head);
#endif
#if L2_LENGTH != 0
@@ -75,102 +81,115 @@
/* L1 Scratchpad SRAM initialization function */
static void __init l1sram_init(void)
{
- free_l1_ssram_head.next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!free_l1_ssram_head.next) {
- printk(KERN_INFO "Failed to initialize Scratchpad data SRAM\n");
- return;
+ unsigned int cpu;
+ for (cpu = 0; cpu < num_possible_cpus(); ++cpu) {
+ per_cpu(free_l1_ssram_head, cpu).next =
+ kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
+ if (!per_cpu(free_l1_ssram_head, cpu).next) {
+ printk(KERN_INFO "Fail to initialize Scratchpad data SRAM.\n");
+ return;
+ }
+
+ per_cpu(free_l1_ssram_head, cpu).next->paddr = (void *)get_l1_scratch_start_cpu(cpu);
+ per_cpu(free_l1_ssram_head, cpu).next->size = L1_SCRATCH_LENGTH;
+ per_cpu(free_l1_ssram_head, cpu).next->pid = 0;
+ per_cpu(free_l1_ssram_head, cpu).next->next = NULL;
+
+ per_cpu(used_l1_ssram_head, cpu).next = NULL;
+
+ /* mutex initialize */
+ spin_lock_init(&per_cpu(l1sram_lock, cpu));
+ printk(KERN_INFO "Blackfin Scratchpad data SRAM: %d KB\n",
+ L1_SCRATCH_LENGTH >> 10);
}
-
- free_l1_ssram_head.next->paddr = (void *)L1_SCRATCH_START;
- free_l1_ssram_head.next->size = L1_SCRATCH_LENGTH;
- free_l1_ssram_head.next->pid = 0;
- free_l1_ssram_head.next->next = NULL;
-
- used_l1_ssram_head.next = NULL;
-
- /* mutex initialize */
- spin_lock_init(&l1sram_lock);
-
- printk(KERN_INFO "Blackfin Scratchpad data SRAM: %d KB\n",
- L1_SCRATCH_LENGTH >> 10);
}
static void __init l1_data_sram_init(void)
{
+ unsigned int cpu;
#if L1_DATA_A_LENGTH != 0
- free_l1_data_A_sram_head.next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!free_l1_data_A_sram_head.next) {
- printk(KERN_INFO "Failed to initialize L1 Data A SRAM\n");
- return;
+ for (cpu = 0; cpu < num_possible_cpus(); ++cpu) {
+ per_cpu(free_l1_data_A_sram_head, cpu).next =
+ kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
+ if (!per_cpu(free_l1_data_A_sram_head, cpu).next) {
+ printk(KERN_INFO "Fail to initialize L1 Data A SRAM.\n");
+ return;
+ }
+
+ per_cpu(free_l1_data_A_sram_head, cpu).next->paddr =
+ (void *)get_l1_data_a_start_cpu(cpu) + (_ebss_l1 - _sdata_l1);
+ per_cpu(free_l1_data_A_sram_head, cpu).next->size =
+ L1_DATA_A_LENGTH - (_ebss_l1 - _sdata_l1);
+ per_cpu(free_l1_data_A_sram_head, cpu).next->pid = 0;
+ per_cpu(free_l1_data_A_sram_head, cpu).next->next = NULL;
+
+ per_cpu(used_l1_data_A_sram_head, cpu).next = NULL;
+
+ printk(KERN_INFO "Blackfin L1 Data A SRAM: %d KB (%d KB free)\n",
+ L1_DATA_A_LENGTH >> 10,
+ per_cpu(free_l1_data_A_sram_head, cpu).next->size >> 10);
}
-
- free_l1_data_A_sram_head.next->paddr =
- (void *)L1_DATA_A_START + (_ebss_l1 - _sdata_l1);
- free_l1_data_A_sram_head.next->size =
- L1_DATA_A_LENGTH - (_ebss_l1 - _sdata_l1);
- free_l1_data_A_sram_head.next->pid = 0;
- free_l1_data_A_sram_head.next->next = NULL;
-
- used_l1_data_A_sram_head.next = NULL;
-
- printk(KERN_INFO "Blackfin L1 Data A SRAM: %d KB (%d KB free)\n",
- L1_DATA_A_LENGTH >> 10,
- free_l1_data_A_sram_head.next->size >> 10);
#endif
#if L1_DATA_B_LENGTH != 0
- free_l1_data_B_sram_head.next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!free_l1_data_B_sram_head.next) {
- printk(KERN_INFO "Failed to initialize L1 Data B SRAM\n");
- return;
+ for (cpu = 0; cpu < num_possible_cpus(); ++cpu) {
+ per_cpu(free_l1_data_B_sram_head, cpu).next =
+ kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
+ if (!per_cpu(free_l1_data_B_sram_head, cpu).next) {
+ printk(KERN_INFO "Fail to initialize L1 Data B SRAM.\n");
+ return;
+ }
+
+ per_cpu(free_l1_data_B_sram_head, cpu).next->paddr =
+ (void *)get_l1_data_b_start_cpu(cpu) + (_ebss_b_l1 - _sdata_b_l1);
+ per_cpu(free_l1_data_B_sram_head, cpu).next->size =
+ L1_DATA_B_LENGTH - (_ebss_b_l1 - _sdata_b_l1);
+ per_cpu(free_l1_data_B_sram_head, cpu).next->pid = 0;
+ per_cpu(free_l1_data_B_sram_head, cpu).next->next = NULL;
+
+ per_cpu(used_l1_data_B_sram_head, cpu).next = NULL;
+
+ printk(KERN_INFO "Blackfin L1 Data B SRAM: %d KB (%d KB free)\n",
+ L1_DATA_B_LENGTH >> 10,
+ per_cpu(free_l1_data_B_sram_head, cpu).next->size >> 10);
+ /* mutex initialize */
}
-
- free_l1_data_B_sram_head.next->paddr =
- (void *)L1_DATA_B_START + (_ebss_b_l1 - _sdata_b_l1);
- free_l1_data_B_sram_head.next->size =
- L1_DATA_B_LENGTH - (_ebss_b_l1 - _sdata_b_l1);
- free_l1_data_B_sram_head.next->pid = 0;
- free_l1_data_B_sram_head.next->next = NULL;
-
- used_l1_data_B_sram_head.next = NULL;
-
- printk(KERN_INFO "Blackfin L1 Data B SRAM: %d KB (%d KB free)\n",
- L1_DATA_B_LENGTH >> 10,
- free_l1_data_B_sram_head.next->size >> 10);
#endif
- /* mutex initialize */
- spin_lock_init(&l1_data_sram_lock);
+#if L1_DATA_A_LENGTH != 0 || L1_DATA_B_LENGTH != 0
+ for (cpu = 0; cpu < num_possible_cpus(); ++cpu)
+ spin_lock_init(&per_cpu(l1_data_sram_lock, cpu));
+#endif
}
static void __init l1_inst_sram_init(void)
{
#if L1_CODE_LENGTH != 0
- free_l1_inst_sram_head.next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!free_l1_inst_sram_head.next) {
- printk(KERN_INFO "Failed to initialize L1 Instruction SRAM\n");
- return;
+ unsigned int cpu;
+ for (cpu = 0; cpu < num_possible_cpus(); ++cpu) {
+ per_cpu(free_l1_inst_sram_head, cpu).next =
+ kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
+ if (!per_cpu(free_l1_inst_sram_head, cpu).next) {
+ printk(KERN_INFO "Failed to initialize L1 Instruction SRAM\n");
+ return;
+ }
+
+ per_cpu(free_l1_inst_sram_head, cpu).next->paddr =
+ (void *)get_l1_code_start_cpu(cpu) + (_etext_l1 - _stext_l1);
+ per_cpu(free_l1_inst_sram_head, cpu).next->size =
+ L1_CODE_LENGTH - (_etext_l1 - _stext_l1);
+ per_cpu(free_l1_inst_sram_head, cpu).next->pid = 0;
+ per_cpu(free_l1_inst_sram_head, cpu).next->next = NULL;
+
+ per_cpu(used_l1_inst_sram_head, cpu).next = NULL;
+
+ printk(KERN_INFO "Blackfin L1 Instruction SRAM: %d KB (%d KB free)\n",
+ L1_CODE_LENGTH >> 10,
+ per_cpu(free_l1_inst_sram_head, cpu).next->size >> 10);
+
+ /* mutex initialize */
+ spin_lock_init(&per_cpu(l1_inst_sram_lock, cpu));
}
-
- free_l1_inst_sram_head.next->paddr =
- (void *)L1_CODE_START + (_etext_l1 - _stext_l1);
- free_l1_inst_sram_head.next->size =
- L1_CODE_LENGTH - (_etext_l1 - _stext_l1);
- free_l1_inst_sram_head.next->pid = 0;
- free_l1_inst_sram_head.next->next = NULL;
-
- used_l1_inst_sram_head.next = NULL;
-
- printk(KERN_INFO "Blackfin L1 Instruction SRAM: %d KB (%d KB free)\n",
- L1_CODE_LENGTH >> 10,
- free_l1_inst_sram_head.next->size >> 10);
#endif
-
- /* mutex initialize */
- spin_lock_init(&l1_inst_sram_lock);
}
static void __init l2_sram_init(void)
@@ -179,7 +198,7 @@
free_l2_sram_head.next =
kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
if (!free_l2_sram_head.next) {
- printk(KERN_INFO "Failed to initialize L2 SRAM\n");
+ printk(KERN_INFO "Fail to initialize L2 SRAM.\n");
return;
}
@@ -200,6 +219,7 @@
/* mutex initialize */
spin_lock_init(&l2_sram_lock);
}
+
void __init bfin_sram_init(void)
{
sram_piece_cache = kmem_cache_create("sram_piece_cache",
@@ -353,20 +373,20 @@
{
#if L1_CODE_LENGTH != 0
- if (addr >= (void *)L1_CODE_START
- && addr < (void *)(L1_CODE_START + L1_CODE_LENGTH))
+ if (addr >= (void *)get_l1_code_start()
+ && addr < (void *)(get_l1_code_start() + L1_CODE_LENGTH))
return l1_inst_sram_free(addr);
else
#endif
#if L1_DATA_A_LENGTH != 0
- if (addr >= (void *)L1_DATA_A_START
- && addr < (void *)(L1_DATA_A_START + L1_DATA_A_LENGTH))
+ if (addr >= (void *)get_l1_data_a_start()
+ && addr < (void *)(get_l1_data_a_start() + L1_DATA_A_LENGTH))
return l1_data_A_sram_free(addr);
else
#endif
#if L1_DATA_B_LENGTH != 0
- if (addr >= (void *)L1_DATA_B_START
- && addr < (void *)(L1_DATA_B_START + L1_DATA_B_LENGTH))
+ if (addr >= (void *)get_l1_data_b_start()
+ && addr < (void *)(get_l1_data_b_start() + L1_DATA_B_LENGTH))
return l1_data_B_sram_free(addr);
else
#endif
@@ -384,17 +404,20 @@
{
unsigned long flags;
void *addr = NULL;
+ unsigned int cpu;
+ cpu = get_cpu();
/* add mutex operation */
- spin_lock_irqsave(&l1_data_sram_lock, flags);
+ spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
#if L1_DATA_A_LENGTH != 0
- addr = _sram_alloc(size, &free_l1_data_A_sram_head,
- &used_l1_data_A_sram_head);
+ addr = _sram_alloc(size, &per_cpu(free_l1_data_A_sram_head, cpu),
+ &per_cpu(used_l1_data_A_sram_head, cpu));
#endif
/* add mutex operation */
- spin_unlock_irqrestore(&l1_data_sram_lock, flags);
+ spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
+ put_cpu();
pr_debug("Allocated address in l1_data_A_sram_alloc is 0x%lx+0x%lx\n",
(long unsigned int)addr, size);
@@ -407,19 +430,22 @@
{
unsigned long flags;
int ret;
+ unsigned int cpu;
+ cpu = get_cpu();
/* add mutex operation */
- spin_lock_irqsave(&l1_data_sram_lock, flags);
+ spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
#if L1_DATA_A_LENGTH != 0
- ret = _sram_free(addr, &free_l1_data_A_sram_head,
- &used_l1_data_A_sram_head);
+ ret = _sram_free(addr, &per_cpu(free_l1_data_A_sram_head, cpu),
+ &per_cpu(used_l1_data_A_sram_head, cpu));
#else
ret = -1;
#endif
/* add mutex operation */
- spin_unlock_irqrestore(&l1_data_sram_lock, flags);
+ spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
+ put_cpu();
return ret;
}
@@ -430,15 +456,18 @@
#if L1_DATA_B_LENGTH != 0
unsigned long flags;
void *addr;
+ unsigned int cpu;
+
+ cpu = get_cpu();
+ /* add mutex operation */
+ spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
+
+ addr = _sram_alloc(size, &per_cpu(free_l1_data_B_sram_head, cpu),
+ &per_cpu(used_l1_data_B_sram_head, cpu));
/* add mutex operation */
- spin_lock_irqsave(&l1_data_sram_lock, flags);
-
- addr = _sram_alloc(size, &free_l1_data_B_sram_head,
- &used_l1_data_B_sram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1_data_sram_lock, flags);
+ spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
+ put_cpu();
pr_debug("Allocated address in l1_data_B_sram_alloc is 0x%lx+0x%lx\n",
(long unsigned int)addr, size);
@@ -455,15 +484,18 @@
#if L1_DATA_B_LENGTH != 0
unsigned long flags;
int ret;
+ unsigned int cpu;
+
+ cpu = get_cpu();
+ /* add mutex operation */
+ spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
+
+ ret = _sram_free(addr, &per_cpu(free_l1_data_B_sram_head, cpu),
+ &per_cpu(used_l1_data_B_sram_head, cpu));
/* add mutex operation */
- spin_lock_irqsave(&l1_data_sram_lock, flags);
-
- ret = _sram_free(addr, &free_l1_data_B_sram_head,
- &used_l1_data_B_sram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1_data_sram_lock, flags);
+ spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
+ put_cpu();
return ret;
#else
@@ -509,15 +541,18 @@
#if L1_CODE_LENGTH != 0
unsigned long flags;
void *addr;
+ unsigned int cpu;
+
+ cpu = get_cpu();
+ /* add mutex operation */
+ spin_lock_irqsave(&per_cpu(l1_inst_sram_lock, cpu), flags);
+
+ addr = _sram_alloc(size, &per_cpu(free_l1_inst_sram_head, cpu),
+ &per_cpu(used_l1_inst_sram_head, cpu));
/* add mutex operation */
- spin_lock_irqsave(&l1_inst_sram_lock, flags);
-
- addr = _sram_alloc(size, &free_l1_inst_sram_head,
- &used_l1_inst_sram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1_inst_sram_lock, flags);
+ spin_unlock_irqrestore(&per_cpu(l1_inst_sram_lock, cpu), flags);
+ put_cpu();
pr_debug("Allocated address in l1_inst_sram_alloc is 0x%lx+0x%lx\n",
(long unsigned int)addr, size);
@@ -534,15 +569,18 @@
#if L1_CODE_LENGTH != 0
unsigned long flags;
int ret;
+ unsigned int cpu;
+
+ cpu = get_cpu();
+ /* add mutex operation */
+ spin_lock_irqsave(&per_cpu(l1_inst_sram_lock, cpu), flags);
+
+ ret = _sram_free(addr, &per_cpu(free_l1_inst_sram_head, cpu),
+ &per_cpu(used_l1_inst_sram_head, cpu));
/* add mutex operation */
- spin_lock_irqsave(&l1_inst_sram_lock, flags);
-
- ret = _sram_free(addr, &free_l1_inst_sram_head,
- &used_l1_inst_sram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1_inst_sram_lock, flags);
+ spin_unlock_irqrestore(&per_cpu(l1_inst_sram_lock, cpu), flags);
+ put_cpu();
return ret;
#else
@@ -556,15 +594,18 @@
{
unsigned long flags;
void *addr;
+ unsigned int cpu;
+
+ cpu = get_cpu();
+ /* add mutex operation */
+ spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags);
+
+ addr = _sram_alloc(size, &per_cpu(free_l1_ssram_head, cpu),
+ &per_cpu(used_l1_ssram_head, cpu));
/* add mutex operation */
- spin_lock_irqsave(&l1sram_lock, flags);
-
- addr = _sram_alloc(size, &free_l1_ssram_head,
- &used_l1_ssram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1sram_lock, flags);
+ spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags);
+ put_cpu();
return addr;
}
@@ -574,15 +615,18 @@
{
unsigned long flags;
void *addr;
+ unsigned int cpu;
+
+ cpu = get_cpu();
+ /* add mutex operation */
+ spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags);
+
+ addr = _sram_alloc_max(&per_cpu(free_l1_ssram_head, cpu),
+ &per_cpu(used_l1_ssram_head, cpu), psize);
/* add mutex operation */
- spin_lock_irqsave(&l1sram_lock, flags);
-
- addr = _sram_alloc_max(&free_l1_ssram_head,
- &used_l1_ssram_head, psize);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1sram_lock, flags);
+ spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags);
+ put_cpu();
return addr;
}
@@ -592,15 +636,18 @@
{
unsigned long flags;
int ret;
+ unsigned int cpu;
+
+ cpu = get_cpu();
+ /* add mutex operation */
+ spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags);
+
+ ret = _sram_free(addr, &per_cpu(free_l1_ssram_head, cpu),
+ &per_cpu(used_l1_ssram_head, cpu));
/* add mutex operation */
- spin_lock_irqsave(&l1sram_lock, flags);
-
- ret = _sram_free(addr, &free_l1_ssram_head,
- &used_l1_ssram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1sram_lock, flags);
+ spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags);
+ put_cpu();
return ret;
}
@@ -761,33 +808,36 @@
int *eof, void *data)
{
int len = 0;
+ unsigned int cpu;
- if (_sram_proc_read(buf, &len, count, "Scratchpad",
- &free_l1_ssram_head, &used_l1_ssram_head))
- goto not_done;
+ for (cpu = 0; cpu < num_possible_cpus(); ++cpu) {
+ if (_sram_proc_read(buf, &len, count, "Scratchpad",
+ &per_cpu(free_l1_ssram_head, cpu), &per_cpu(used_l1_ssram_head, cpu)))
+ goto not_done;
#if L1_DATA_A_LENGTH != 0
- if (_sram_proc_read(buf, &len, count, "L1 Data A",
- &free_l1_data_A_sram_head,
- &used_l1_data_A_sram_head))
- goto not_done;
+ if (_sram_proc_read(buf, &len, count, "L1 Data A",
+ &per_cpu(free_l1_data_A_sram_head, cpu),
+ &per_cpu(used_l1_data_A_sram_head, cpu)))
+ goto not_done;
#endif
#if L1_DATA_B_LENGTH != 0
- if (_sram_proc_read(buf, &len, count, "L1 Data B",
- &free_l1_data_B_sram_head,
- &used_l1_data_B_sram_head))
- goto not_done;
+ if (_sram_proc_read(buf, &len, count, "L1 Data B",
+ &per_cpu(free_l1_data_B_sram_head, cpu),
+ &per_cpu(used_l1_data_B_sram_head, cpu)))
+ goto not_done;
#endif
#if L1_CODE_LENGTH != 0
- if (_sram_proc_read(buf, &len, count, "L1 Instruction",
- &free_l1_inst_sram_head, &used_l1_inst_sram_head))
- goto not_done;
+ if (_sram_proc_read(buf, &len, count, "L1 Instruction",
+ &per_cpu(free_l1_inst_sram_head, cpu),
+ &per_cpu(used_l1_inst_sram_head, cpu)))
+ goto not_done;
#endif
+ }
#if L2_LENGTH != 0
- if (_sram_proc_read(buf, &len, count, "L2",
- &free_l2_sram_head, &used_l2_sram_head))
+ if (_sram_proc_read(buf, &len, count, "L2", &free_l2_sram_head,
+ &used_l2_sram_head))
goto not_done;
#endif
-
*eof = 1;
not_done:
return len;