setup.c

来自「linux 内核源代码」· C语言 代码 · 共 706 行 · 第 1/2 页

	printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
	printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);

	printk(KERN_INFO "Memory map:\n"
	       KERN_INFO "  text      = 0x%p-0x%p\n"
	       KERN_INFO "  rodata    = 0x%p-0x%p\n"
	       KERN_INFO "  data      = 0x%p-0x%p\n"
	       KERN_INFO "    stack   = 0x%p-0x%p\n"
	       KERN_INFO "  init      = 0x%p-0x%p\n"
	       KERN_INFO "  bss       = 0x%p-0x%p\n"
	       KERN_INFO "  available = 0x%p-0x%p\n"
#ifdef CONFIG_MTD_UCLINUX
	       KERN_INFO "  rootfs    = 0x%p-0x%p\n"
#endif
#if DMA_UNCACHED_REGION > 0
	       KERN_INFO "  DMA Zone  = 0x%p-0x%p\n"
#endif
	       , _stext, _etext,
	       __start_rodata, __end_rodata,
	       _sdata, _edata,
	       (void *)&init_thread_union, (void *)((int)(&init_thread_union) + 0x2000),
	       __init_begin, __init_end,
	       __bss_start, __bss_stop,
	       (void *)_ramstart, (void *)memory_end
#ifdef CONFIG_MTD_UCLINUX
	       , (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
#endif
#if DMA_UNCACHED_REGION > 0
	       , (void *)(_ramend - DMA_UNCACHED_REGION), (void *)(_ramend)
#endif
	       );

	/*
	 * 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), memory_start >> PAGE_SHIFT,	/* map goes here */
					 PAGE_OFFSET >> PAGE_SHIFT,
					 memory_end >> PAGE_SHIFT);
	/*
	 * free the usable memory,  we have to make sure we do not free
	 * the bootmem bitmap so we then reserve it after freeing it :-)
	 */
	free_bootmem(memory_start, memory_end - memory_start);

	reserve_bootmem(memory_start, bootmap_size);
	/*
	 * get kmalloc into gear
	 */
	paging_init();

	/* check the size of the l1 area */
	l1_length = _etext_l1 - _stext_l1;
	if (l1_length > L1_CODE_LENGTH)
		panic("L1 code memory overflow\n");

	l1_length = _ebss_l1 - _sdata_l1;
	if (l1_length > L1_DATA_A_LENGTH)
		panic("L1 data memory overflow\n");

	/* Copy atomic sequences to their fixed location, and sanity check that
	   these locations are the ones that we advertise to userspace.  */
	memcpy((void *)FIXED_CODE_START, &fixed_code_start,
	       FIXED_CODE_END - FIXED_CODE_START);
	BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
	       != SIGRETURN_STUB - FIXED_CODE_START);
	BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
	       != ATOMIC_XCHG32 - FIXED_CODE_START);
	BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
	       != ATOMIC_CAS32 - FIXED_CODE_START);
	BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
	       != ATOMIC_ADD32 - FIXED_CODE_START);
	BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
	       != ATOMIC_SUB32 - FIXED_CODE_START);
	BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
	       != ATOMIC_IOR32 - FIXED_CODE_START);
	BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
	       != ATOMIC_AND32 - FIXED_CODE_START);
	BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
	       != ATOMIC_XOR32 - FIXED_CODE_START);
	BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
		!= SAFE_USER_INSTRUCTION - FIXED_CODE_START);

	init_exception_vectors();
	bf53x_cache_init();
}

static int __init topology_init(void)
{
#if defined (CONFIG_BF561)
	static struct cpu cpu[2];
	register_cpu(&cpu[0], 0);
	register_cpu(&cpu[1], 1);
	return 0;
#else
	static struct cpu cpu[1];
	return register_cpu(cpu, 0);
#endif
}

subsys_initcall(topology_init);

static u_long get_vco(void)
{
	u_long msel;
	u_long vco;

	msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
	if (0 == msel)
		msel = 64;

	vco = CONFIG_CLKIN_HZ;
	vco >>= (1 & bfin_read_PLL_CTL());	/* DF bit */
	vco = msel * vco;
	return vco;
}

/* Get the Core clock */
u_long get_cclk(void)
{
	u_long csel, ssel;
	if (bfin_read_PLL_STAT() & 0x1)
		return CONFIG_CLKIN_HZ;

	ssel = bfin_read_PLL_DIV();
	csel = ((ssel >> 4) & 0x03);
	ssel &= 0xf;
	if (ssel && ssel < (1 << csel))	/* SCLK > CCLK */
		return get_vco() / ssel;
	return get_vco() >> csel;
}
EXPORT_SYMBOL(get_cclk);

/* Get the System clock */
u_long get_sclk(void)
{
	u_long ssel;

	if (bfin_read_PLL_STAT() & 0x1)
		return CONFIG_CLKIN_HZ;

	ssel = (bfin_read_PLL_DIV() & 0xf);
	if (0 == ssel) {
		printk(KERN_WARNING "Invalid System Clock\n");
		ssel = 1;
	}

	return get_vco() / ssel;
}
EXPORT_SYMBOL(get_sclk);

unsigned long sclk_to_usecs(unsigned long sclk)
{
	u64 tmp = USEC_PER_SEC * (u64)sclk;
	do_div(tmp, get_sclk());
	return tmp;
}
EXPORT_SYMBOL(sclk_to_usecs);

unsigned long usecs_to_sclk(unsigned long usecs)
{
	u64 tmp = get_sclk() * (u64)usecs;
	do_div(tmp, USEC_PER_SEC);
	return tmp;
}
EXPORT_SYMBOL(usecs_to_sclk);

/*
 *	Get CPU information for use by the procfs.
 */
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_int dcache_size = 0, dsup_banks = 0;

	cpu = CPU;
	mmu = "none";
	fpu = "none";
	revid = bfin_revid();

	cclk = get_cclk();
	sclk = get_sclk();

	switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
	case 0xca:
		vendor = "Analog Devices";
		break;
	default:
		vendor = "unknown";
		break;
	}

	seq_printf(m, "processor\t: %d\n"
		"vendor_id\t: %s\n"
		"cpu family\t: 0x%x\n"
		"model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK)\n"
		"stepping\t: %d\n",
		0,
		vendor,
		(bfin_read_CHIPID() & CHIPID_FAMILY),
		cpu, cclk/1000000, sclk/1000000,
		revid);

	seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
		cclk/1000000, 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));

	/* Check Cache configutation */
	switch (bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
	case ACACHE_BSRAM:
		cache = "dbank-A/B\t: cache/sram";
		dcache_size = 16;
		dsup_banks = 1;
		break;
	case ACACHE_BCACHE:
		cache = "dbank-A/B\t: cache/cache";
		dcache_size = 32;
		dsup_banks = 2;
		break;
	case ASRAM_BSRAM:
		cache = "dbank-A/B\t: sram/sram";
		dcache_size = 0;
		dsup_banks = 0;
		break;
	default:
		cache = "unknown";
		dcache_size = 0;
		dsup_banks = 0;
		break;
	}

	/* Is it turned on? */
	if (!((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE)))
		dcache_size = 0;

	seq_printf(m, "cache size\t: %d KB(L1 icache) "
		"%d KB(L1 dcache-%s) %d KB(L2 cache)\n",
		BFIN_ICACHESIZE / 1024, dcache_size,
#if defined CONFIG_BFIN_WB
		"wb"
#elif defined CONFIG_BFIN_WT
		"wt"
#endif
		"", 0);

	seq_printf(m, "%s\n", cache);

	seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
		   BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
	seq_printf(m,
		   "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
		   dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
		   BFIN_DLINES);
#ifdef CONFIG_BFIN_ICACHE_LOCK
	switch (read_iloc()) {
	case WAY0_L:
		seq_printf(m, "Way0 Locked-Down\n");
		break;
	case WAY1_L:
		seq_printf(m, "Way1 Locked-Down\n");
		break;
	case WAY01_L:
		seq_printf(m, "Way0,Way1 Locked-Down\n");
		break;
	case WAY2_L:
		seq_printf(m, "Way2 Locked-Down\n");
		break;
	case WAY02_L:
		seq_printf(m, "Way0,Way2 Locked-Down\n");
		break;
	case WAY12_L:
		seq_printf(m, "Way1,Way2 Locked-Down\n");
		break;
	case WAY012_L:
		seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
		break;
	case WAY3_L:
		seq_printf(m, "Way3 Locked-Down\n");
		break;
	case WAY03_L:
		seq_printf(m, "Way0,Way3 Locked-Down\n");
		break;
	case WAY13_L:
		seq_printf(m, "Way1,Way3 Locked-Down\n");
		break;
	case WAY013_L:
		seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
		break;
	case WAY32_L:
		seq_printf(m, "Way3,Way2 Locked-Down\n");
		break;
	case WAY320_L:
		seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
		break;
	case WAY321_L:
		seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
		break;
	case WAYALL_L:
		seq_printf(m, "All Ways are locked\n");
		break;
	default:
		seq_printf(m, "No Ways are locked\n");
	}
#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);
	seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n",
		((int)memory_end - (int)_stext) >> 10,
		_stext,
		(void *)memory_end);

	return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
	return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
}

static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
	++*pos;
	return c_start(m, pos);
}

static void c_stop(struct seq_file *m, void *v)
{
}

struct seq_operations cpuinfo_op = {
	.start = c_start,
	.next = c_next,
	.stop = c_stop,
	.show = show_cpuinfo,
};

void __init cmdline_init(const char *r0)
{
	if (r0)
		strncpy(command_line, r0, COMMAND_LINE_SIZE);
}