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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>
This commit is contained in:
Graf Yang 2008-11-18 17:48:22 +08:00 committed by Bryan Wu
parent b8a989893c
commit 8f65873e47
14 changed files with 599 additions and 328 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
arch/blackfin/kernel/asm-offsets.c
View File

@ -56,6 +56,9 @@ int main(void)
/* 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 @@ int main(void)
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;
}

34
arch/blackfin/kernel/bfin_ksyms.c
View File

@ -68,3 +68,37 @@ EXPORT_SYMBOL(insw_8);
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

1
arch/blackfin/kernel/entry.S
View File

@ -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>

24
arch/blackfin/kernel/irqchip.c
View File

@ -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 dummy_mask_unmask_irq(unsigned int irq)
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 @@ static struct irq_desc bad_irq_desc = {
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 @@ int show_interrupts(struct seq_file *p, void *v)
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 @@ int show_interrupts(struct seq_file *p, void *v)
* come via this function. Instead, they should provide their
* own 'handler'
*/
#ifdef CONFIG_DO_IRQ_L1
__attribute__((l1_text))
#endif

4
arch/blackfin/kernel/kgdb.c
View File

@ -363,12 +363,12 @@ void kgdb_passive_cpu_callback(void *info)
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

13
arch/blackfin/kernel/module.c
View File

@ -343,7 +343,13 @@ apply_relocate_add(Elf_Shdr * sechdrs, const char *strtab,
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 @@ module_finalize(const Elf_Ehdr * hdr,
{
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 @@ module_finalize(const Elf_Ehdr * hdr,
(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;

23
arch/blackfin/kernel/process.c
View File

@ -171,6 +171,13 @@ asmlinkage int bfin_clone(struct pt_regs *regs)
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 @@ int _access_ok(unsigned long addr, unsigned long size)
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

8
arch/blackfin/kernel/ptrace.c
View File

@ -220,8 +220,8 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
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 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
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);

24
arch/blackfin/kernel/reboot.c
View File

@ -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)
}
}
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 @@ void machine_restart(char *cmd)
{
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))

163
arch/blackfin/kernel/setup.c
View File

@ -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 change_member *change_point[2*BFIN_MEMMAP_MAX] __initdata;
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 @@ static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map)
/* 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 @@ static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map)
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 @@ static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map)
}
/* 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 @@ static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map)
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 @@ static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map)
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 @@ static __init int parse_memmap(char *arg)
* - "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 @@ static __init void parse_cmdline_early(char *cmdline_p)
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 @@ static __init void parse_cmdline_early(char *cmdline_p)
* [_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 @@ static __init void memory_setup(void)
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 @@ static __init void setup_bootmem_allocator(void)
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 @@ void __init setup_arch(char **cmdline_p)
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 @@ void __init setup_arch(char **cmdline_p)
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 @@ void __init setup_arch(char **cmdline_p)
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 @@ static int show_cpuinfo(struct seq_file *m, void *v)
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 @@ static int show_cpuinfo(struct seq_file *m, void *v)
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 @@ static int show_cpuinfo(struct seq_file *m, void *v)
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 @@ static int show_cpuinfo(struct seq_file *m, void *v)
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 @@ static int show_cpuinfo(struct seq_file *m, void *v)
}
/* 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 @@ static int show_cpuinfo(struct seq_file *m, void *v)
"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;
@ -1136,6 +1188,12 @@ static int show_cpuinfo(struct seq_file *m, void *v)
default:
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",
@ -1144,6 +1202,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
((int)memory_end - (int)_stext) >> 10,
_stext,
(void *)memory_end);
seq_printf(m, "\n");
return 0;
}

108
arch/blackfin/kernel/time.c
View File

@ -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 unsigned long gettimeoffset(void);
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 @@ time_sched_init(irq_handler_t timer_routine)
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 @@ static unsigned long gettimeoffset(void)
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 @@ irqreturn_t timer_interrupt(int irq, void *dummy)
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;
}

58
arch/blackfin/kernel/traps.c
View File

@ -75,16 +75,6 @@ void __init trap_init(void)
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 @@ asmlinkage void double_fault_c(struct pt_regs *fp)
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
{
@ -239,6 +229,9 @@ asmlinkage void trap_c(struct pt_regs *fp)
{
#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;
@ -417,7 +410,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
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 @@ asmlinkage void trap_c(struct pt_regs *fp)
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 @@ void dump_bfin_process(struct pt_regs *fp)
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 @@ void show_regs(struct pt_regs *fp)
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 @@ unlock:
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 @@ unlock:
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;
}

60
arch/blackfin/mm/init.c
View File

@ -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 @@ static unsigned long empty_bad_page;
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 @@ void __init paging_init(void)
}
}
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 @@ void __init mem_init(void)
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);

378
arch/blackfin/mm/sram-alloc.c
View File

@ -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 {
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 @@ static struct kmem_cache *sram_piece_cache;
/* 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 @@ static void __init l2_sram_init(void)
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 @@ static void __init l2_sram_init(void)
/* 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 @@ int sram_free(const void *addr)
{
#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 @@ void *l1_data_A_sram_alloc(size_t size)
{
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 @@ int l1_data_A_sram_free(const void *addr)
{
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 @@ void *l1_data_B_sram_alloc(size_t size)
#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 @@ int l1_data_B_sram_free(const void *addr)
#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 @@ void *l1_inst_sram_alloc(size_t size)
#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 @@ int l1_inst_sram_free(const void *addr)
#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 @@ void *l1sram_alloc(size_t size)
{
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 @@ void *l1sram_alloc_max(size_t *psize)
{
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 @@ int l1sram_free(const void *addr)
{
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 @@ static int sram_proc_read(char *buf, char **start, off_t offset, int count,
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;