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authorAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
committerAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
commitb4b6116a13633898cf868f2f103c96a90c4c20f8 (patch)
tree93d1b7e2cfcdf473d8d4ff3ad141fa864f8491f6 /arch/sh/kernel/setup.c
parentedd4be777c953e5faafc80d091d3084b4343f5d3 (diff)
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fedora kernel: d9aad82f3319f3cfd1aebc01234254ef0c37ad84v3.3.2-1
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/sh/kernel/setup.c')
-rw-r--r--arch/sh/kernel/setup.c324
1 files changed, 324 insertions, 0 deletions
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
new file mode 100644
index 00000000000..7b57bf1dc85
--- /dev/null
+++ b/arch/sh/kernel/setup.c
@@ -0,0 +1,324 @@
+/*
+ * arch/sh/kernel/setup.c
+ *
+ * This file handles the architecture-dependent parts of initialization
+ *
+ * Copyright (C) 1999 Niibe Yutaka
+ * Copyright (C) 2002 - 2010 Paul Mundt
+ */
+#include <linux/screen_info.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/initrd.h>
+#include <linux/bootmem.h>
+#include <linux/console.h>
+#include <linux/root_dev.h>
+#include <linux/utsname.h>
+#include <linux/nodemask.h>
+#include <linux/cpu.h>
+#include <linux/pfn.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/kexec.h>
+#include <linux/module.h>
+#include <linux/smp.h>
+#include <linux/err.h>
+#include <linux/crash_dump.h>
+#include <linux/mmzone.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/memblock.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/page.h>
+#include <asm/elf.h>
+#include <asm/sections.h>
+#include <asm/irq.h>
+#include <asm/setup.h>
+#include <asm/clock.h>
+#include <asm/smp.h>
+#include <asm/mmu_context.h>
+#include <asm/mmzone.h>
+#include <asm/sparsemem.h>
+
+/*
+ * Initialize loops_per_jiffy as 10000000 (1000MIPS).
+ * This value will be used at the very early stage of serial setup.
+ * The bigger value means no problem.
+ */
+struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
+ [0] = {
+ .type = CPU_SH_NONE,
+ .family = CPU_FAMILY_UNKNOWN,
+ .loops_per_jiffy = 10000000,
+ .phys_bits = MAX_PHYSMEM_BITS,
+ },
+};
+EXPORT_SYMBOL(cpu_data);
+
+/*
+ * The machine vector. First entry in .machvec.init, or clobbered by
+ * sh_mv= on the command line, prior to .machvec.init teardown.
+ */
+struct sh_machine_vector sh_mv = { .mv_name = "generic", };
+EXPORT_SYMBOL(sh_mv);
+
+#ifdef CONFIG_VT
+struct screen_info screen_info;
+#endif
+
+extern int root_mountflags;
+
+#define RAMDISK_IMAGE_START_MASK 0x07FF
+#define RAMDISK_PROMPT_FLAG 0x8000
+#define RAMDISK_LOAD_FLAG 0x4000
+
+static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
+
+static struct resource code_resource = {
+ .name = "Kernel code",
+ .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
+};
+
+static struct resource data_resource = {
+ .name = "Kernel data",
+ .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
+};
+
+static struct resource bss_resource = {
+ .name = "Kernel bss",
+ .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
+};
+
+unsigned long memory_start;
+EXPORT_SYMBOL(memory_start);
+unsigned long memory_end = 0;
+EXPORT_SYMBOL(memory_end);
+unsigned long memory_limit = 0;
+
+static struct resource mem_resources[MAX_NUMNODES];
+
+int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
+
+static int __init early_parse_mem(char *p)
+{
+ if (!p)
+ return 1;
+
+ memory_limit = PAGE_ALIGN(memparse(p, &p));
+
+ pr_notice("Memory limited to %ldMB\n", memory_limit >> 20);
+
+ return 0;
+}
+early_param("mem", early_parse_mem);
+
+void __init check_for_initrd(void)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+ unsigned long start, end;
+
+ /*
+ * Check for the rare cases where boot loaders adhere to the boot
+ * ABI.
+ */
+ if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE)
+ goto disable;
+
+ start = INITRD_START + __MEMORY_START;
+ end = start + INITRD_SIZE;
+
+ if (unlikely(end <= start))
+ goto disable;
+ if (unlikely(start & ~PAGE_MASK)) {
+ pr_err("initrd must be page aligned\n");
+ goto disable;
+ }
+
+ if (unlikely(start < __MEMORY_START)) {
+ pr_err("initrd start (%08lx) < __MEMORY_START(%x)\n",
+ start, __MEMORY_START);
+ goto disable;
+ }
+
+ if (unlikely(end > memblock_end_of_DRAM())) {
+ pr_err("initrd extends beyond end of memory "
+ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+ end, (unsigned long)memblock_end_of_DRAM());
+ goto disable;
+ }
+
+ /*
+ * If we got this far in spite of the boot loader's best efforts
+ * to the contrary, assume we actually have a valid initrd and
+ * fix up the root dev.
+ */
+ ROOT_DEV = Root_RAM0;
+
+ /*
+ * Address sanitization
+ */
+ initrd_start = (unsigned long)__va(start);
+ initrd_end = initrd_start + INITRD_SIZE;
+
+ memblock_reserve(__pa(initrd_start), INITRD_SIZE);
+
+ return;
+
+disable:
+ pr_info("initrd disabled\n");
+ initrd_start = initrd_end = 0;
+#endif
+}
+
+void __cpuinit calibrate_delay(void)
+{
+ struct clk *clk = clk_get(NULL, "cpu_clk");
+
+ if (IS_ERR(clk))
+ panic("Need a sane CPU clock definition!");
+
+ loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ;
+
+ printk(KERN_INFO "Calibrating delay loop (skipped)... "
+ "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
+ loops_per_jiffy/(500000/HZ),
+ (loops_per_jiffy/(5000/HZ)) % 100,
+ loops_per_jiffy);
+}
+
+void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
+ unsigned long end_pfn)
+{
+ struct resource *res = &mem_resources[nid];
+ unsigned long start, end;
+
+ WARN_ON(res->name); /* max one active range per node for now */
+
+ start = start_pfn << PAGE_SHIFT;
+ end = end_pfn << PAGE_SHIFT;
+
+ res->name = "System RAM";
+ res->start = start;
+ res->end = end - 1;
+ res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+
+ if (request_resource(&iomem_resource, res)) {
+ pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
+ start_pfn, end_pfn);
+ return;
+ }
+
+ /*
+ * We don't know which RAM region contains kernel data or
+ * the reserved crashkernel region, so try it repeatedly
+ * and let the resource manager test it.
+ */
+ request_resource(res, &code_resource);
+ request_resource(res, &data_resource);
+ request_resource(res, &bss_resource);
+#ifdef CONFIG_KEXEC
+ request_resource(res, &crashk_res);
+#endif
+
+ /*
+ * Also make sure that there is a PMB mapping that covers this
+ * range before we attempt to activate it, to avoid reset by MMU.
+ * We can hit this path with NUMA or memory hot-add.
+ */
+ pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
+ PAGE_KERNEL);
+
+ memblock_set_node(PFN_PHYS(start_pfn),
+ PFN_PHYS(end_pfn - start_pfn), nid);
+}
+
+void __init __weak plat_early_device_setup(void)
+{
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+ enable_mmu();
+
+ ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
+
+ printk(KERN_NOTICE "Boot params:\n"
+ "... MOUNT_ROOT_RDONLY - %08lx\n"
+ "... RAMDISK_FLAGS - %08lx\n"
+ "... ORIG_ROOT_DEV - %08lx\n"
+ "... LOADER_TYPE - %08lx\n"
+ "... INITRD_START - %08lx\n"
+ "... INITRD_SIZE - %08lx\n",
+ MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
+ ORIG_ROOT_DEV, LOADER_TYPE,
+ INITRD_START, INITRD_SIZE);
+
+#ifdef CONFIG_BLK_DEV_RAM
+ rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
+ rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
+ rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
+#endif
+
+ if (!MOUNT_ROOT_RDONLY)
+ root_mountflags &= ~MS_RDONLY;
+ init_mm.start_code = (unsigned long) _text;
+ init_mm.end_code = (unsigned long) _etext;
+ init_mm.end_data = (unsigned long) _edata;
+ init_mm.brk = (unsigned long) _end;
+
+ code_resource.start = virt_to_phys(_text);
+ code_resource.end = virt_to_phys(_etext)-1;
+ data_resource.start = virt_to_phys(_etext);
+ data_resource.end = virt_to_phys(_edata)-1;
+ bss_resource.start = virt_to_phys(__bss_start);
+ bss_resource.end = virt_to_phys(_ebss)-1;
+
+#ifdef CONFIG_CMDLINE_OVERWRITE
+ strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
+#else
+ strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
+#ifdef CONFIG_CMDLINE_EXTEND
+ strlcat(command_line, " ", sizeof(command_line));
+ strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line));
+#endif
+#endif
+
+ /* Save unparsed command line copy for /proc/cmdline */
+ memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
+ *cmdline_p = command_line;
+
+ parse_early_param();
+
+ plat_early_device_setup();
+
+ sh_mv_setup();
+
+ /* Let earlyprintk output early console messages */
+ early_platform_driver_probe("earlyprintk", 1, 1);
+
+ paging_init();
+
+#ifdef CONFIG_DUMMY_CONSOLE
+ conswitchp = &dummy_con;
+#endif
+
+ /* Perform the machine specific initialisation */
+ if (likely(sh_mv.mv_setup))
+ sh_mv.mv_setup(cmdline_p);
+
+ plat_smp_setup();
+}
+
+/* processor boot mode configuration */
+int generic_mode_pins(void)
+{
+ pr_warning("generic_mode_pins(): missing mode pin configuration\n");
+ return 0;
+}
+
+int test_mode_pin(int pin)
+{
+ return sh_mv.mv_mode_pins() & pin;
+}