627 lines
16 KiB
C
627 lines
16 KiB
C
/*
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* arch/sh/kernel/setup.c
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*
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* This file handles the architecture-dependent parts of initialization
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*
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* Copyright (C) 1999 Niibe Yutaka
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* Copyright (C) 2002 - 2007 Paul Mundt
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*/
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#include <linux/screen_info.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/initrd.h>
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#include <linux/bootmem.h>
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#include <linux/console.h>
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#include <linux/seq_file.h>
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#include <linux/root_dev.h>
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#include <linux/utsname.h>
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#include <linux/nodemask.h>
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#include <linux/cpu.h>
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#include <linux/pfn.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/kexec.h>
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#include <linux/module.h>
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#include <linux/smp.h>
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#include <linux/err.h>
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#include <linux/debugfs.h>
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#include <linux/crash_dump.h>
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#include <linux/mmzone.h>
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/lmb.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <asm/page.h>
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#include <asm/elf.h>
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#include <asm/sections.h>
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#include <asm/irq.h>
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#include <asm/setup.h>
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#include <asm/clock.h>
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#include <asm/mmu_context.h>
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/*
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* Initialize loops_per_jiffy as 10000000 (1000MIPS).
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* This value will be used at the very early stage of serial setup.
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* The bigger value means no problem.
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*/
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struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
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[0] = {
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.type = CPU_SH_NONE,
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.family = CPU_FAMILY_UNKNOWN,
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.loops_per_jiffy = 10000000,
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},
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};
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EXPORT_SYMBOL(cpu_data);
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/*
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* The machine vector. First entry in .machvec.init, or clobbered by
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* sh_mv= on the command line, prior to .machvec.init teardown.
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*/
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struct sh_machine_vector sh_mv = { .mv_name = "generic", };
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EXPORT_SYMBOL(sh_mv);
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#ifdef CONFIG_VT
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struct screen_info screen_info;
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#endif
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extern int root_mountflags;
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#define RAMDISK_IMAGE_START_MASK 0x07FF
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#define RAMDISK_PROMPT_FLAG 0x8000
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#define RAMDISK_LOAD_FLAG 0x4000
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static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
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static struct resource code_resource = {
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.name = "Kernel code",
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
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};
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static struct resource data_resource = {
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.name = "Kernel data",
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
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};
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static struct resource bss_resource = {
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.name = "Kernel bss",
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
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};
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unsigned long memory_start;
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EXPORT_SYMBOL(memory_start);
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unsigned long memory_end = 0;
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EXPORT_SYMBOL(memory_end);
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static struct resource mem_resources[MAX_NUMNODES];
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int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
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static int __init early_parse_mem(char *p)
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{
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unsigned long size;
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memory_start = (unsigned long)__va(__MEMORY_START);
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size = memparse(p, &p);
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if (size > __MEMORY_SIZE) {
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printk(KERN_ERR
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"Using mem= to increase the size of kernel memory "
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"is not allowed.\n"
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" Recompile the kernel with the correct value for "
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"CONFIG_MEMORY_SIZE.\n");
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return 0;
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}
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memory_end = memory_start + size;
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return 0;
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}
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early_param("mem", early_parse_mem);
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/*
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* Register fully available low RAM pages with the bootmem allocator.
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*/
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static void __init register_bootmem_low_pages(void)
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{
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unsigned long curr_pfn, last_pfn, pages;
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/*
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* We are rounding up the start address of usable memory:
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*/
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curr_pfn = PFN_UP(__MEMORY_START);
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/*
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* ... and at the end of the usable range downwards:
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*/
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last_pfn = PFN_DOWN(__pa(memory_end));
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if (last_pfn > max_low_pfn)
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last_pfn = max_low_pfn;
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pages = last_pfn - curr_pfn;
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free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
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}
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#ifdef CONFIG_KEXEC
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static void __init reserve_crashkernel(void)
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{
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unsigned long long free_mem;
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unsigned long long crash_size, crash_base;
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void *vp;
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int ret;
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free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
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ret = parse_crashkernel(boot_command_line, free_mem,
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&crash_size, &crash_base);
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if (ret == 0 && crash_size) {
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if (crash_base <= 0) {
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vp = alloc_bootmem_nopanic(crash_size);
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if (!vp) {
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printk(KERN_INFO "crashkernel allocation "
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"failed\n");
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return;
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}
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crash_base = __pa(vp);
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} else if (reserve_bootmem(crash_base, crash_size,
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BOOTMEM_EXCLUSIVE) < 0) {
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printk(KERN_INFO "crashkernel reservation failed - "
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"memory is in use\n");
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return;
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}
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printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
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"for crashkernel (System RAM: %ldMB)\n",
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(unsigned long)(crash_size >> 20),
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(unsigned long)(crash_base >> 20),
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(unsigned long)(free_mem >> 20));
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crashk_res.start = crash_base;
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crashk_res.end = crash_base + crash_size - 1;
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insert_resource(&iomem_resource, &crashk_res);
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}
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}
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#else
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static inline void __init reserve_crashkernel(void)
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{}
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#endif
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void __cpuinit calibrate_delay(void)
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{
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struct clk *clk = clk_get(NULL, "cpu_clk");
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if (IS_ERR(clk))
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panic("Need a sane CPU clock definition!");
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loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ;
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printk(KERN_INFO "Calibrating delay loop (skipped)... "
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"%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
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loops_per_jiffy/(500000/HZ),
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(loops_per_jiffy/(5000/HZ)) % 100,
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loops_per_jiffy);
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}
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void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
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unsigned long end_pfn)
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{
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struct resource *res = &mem_resources[nid];
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WARN_ON(res->name); /* max one active range per node for now */
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res->name = "System RAM";
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res->start = start_pfn << PAGE_SHIFT;
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res->end = (end_pfn << PAGE_SHIFT) - 1;
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res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
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if (request_resource(&iomem_resource, res)) {
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pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
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start_pfn, end_pfn);
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return;
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}
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/*
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* We don't know which RAM region contains kernel data,
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* so we try it repeatedly and let the resource manager
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* test it.
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*/
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request_resource(res, &code_resource);
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request_resource(res, &data_resource);
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request_resource(res, &bss_resource);
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add_active_range(nid, start_pfn, end_pfn);
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}
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void __init setup_bootmem_allocator(unsigned long free_pfn)
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{
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unsigned long bootmap_size;
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unsigned long bootmap_pages, bootmem_paddr;
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u64 total_pages = (lmb_end_of_DRAM() - __MEMORY_START) >> PAGE_SHIFT;
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int i;
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bootmap_pages = bootmem_bootmap_pages(total_pages);
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bootmem_paddr = lmb_alloc(bootmap_pages << PAGE_SHIFT, PAGE_SIZE);
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/*
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* Find a proper area for the bootmem bitmap. After this
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* bootstrap step all allocations (until the page allocator
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* is intact) must be done via bootmem_alloc().
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*/
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bootmap_size = init_bootmem_node(NODE_DATA(0),
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bootmem_paddr >> PAGE_SHIFT,
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min_low_pfn, max_low_pfn);
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/* Add active regions with valid PFNs. */
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for (i = 0; i < lmb.memory.cnt; i++) {
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unsigned long start_pfn, end_pfn;
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start_pfn = lmb.memory.region[i].base >> PAGE_SHIFT;
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end_pfn = start_pfn + lmb_size_pages(&lmb.memory, i);
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__add_active_range(0, start_pfn, end_pfn);
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}
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/*
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* Add all physical memory to the bootmem map and mark each
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* area as present.
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*/
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register_bootmem_low_pages();
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/* Reserve the sections we're already using. */
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for (i = 0; i < lmb.reserved.cnt; i++)
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reserve_bootmem(lmb.reserved.region[i].base,
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lmb_size_bytes(&lmb.reserved, i),
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BOOTMEM_DEFAULT);
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node_set_online(0);
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sparse_memory_present_with_active_regions(0);
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#ifdef CONFIG_BLK_DEV_INITRD
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ROOT_DEV = Root_RAM0;
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if (LOADER_TYPE && INITRD_START) {
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unsigned long initrd_start_phys = INITRD_START + __MEMORY_START;
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if (initrd_start_phys + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
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reserve_bootmem(initrd_start_phys, INITRD_SIZE,
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BOOTMEM_DEFAULT);
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initrd_start = (unsigned long)__va(initrd_start_phys);
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initrd_end = initrd_start + INITRD_SIZE;
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} else {
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printk("initrd extends beyond end of memory "
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"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
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initrd_start_phys + INITRD_SIZE,
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(unsigned long)PFN_PHYS(max_low_pfn));
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initrd_start = 0;
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}
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}
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#endif
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reserve_crashkernel();
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}
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#ifndef CONFIG_NEED_MULTIPLE_NODES
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static void __init setup_memory(void)
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{
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unsigned long start_pfn;
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u64 base = min_low_pfn << PAGE_SHIFT;
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u64 size = (max_low_pfn << PAGE_SHIFT) - base;
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/*
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* Partially used pages are not usable - thus
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* we are rounding upwards:
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*/
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start_pfn = PFN_UP(__pa(_end));
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lmb_add(base, size);
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/*
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* Reserve the kernel text and
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* Reserve the bootmem bitmap. We do this in two steps (first step
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* was init_bootmem()), because this catches the (definitely buggy)
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* case of us accidentally initializing the bootmem allocator with
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* an invalid RAM area.
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*/
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lmb_reserve(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET,
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(PFN_PHYS(start_pfn) + PAGE_SIZE - 1) -
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(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET));
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/*
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* Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET.
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*/
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if (CONFIG_ZERO_PAGE_OFFSET != 0)
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lmb_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET);
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lmb_analyze();
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lmb_dump_all();
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setup_bootmem_allocator(start_pfn);
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}
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#else
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extern void __init setup_memory(void);
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#endif
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/*
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* Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
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* is_kdump_kernel() to determine if we are booting after a panic. Hence
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* ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
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*/
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#ifdef CONFIG_CRASH_DUMP
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/* elfcorehdr= specifies the location of elf core header
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* stored by the crashed kernel.
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*/
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static int __init parse_elfcorehdr(char *arg)
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{
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if (!arg)
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return -EINVAL;
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elfcorehdr_addr = memparse(arg, &arg);
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return 0;
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}
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early_param("elfcorehdr", parse_elfcorehdr);
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#endif
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void __init __attribute__ ((weak)) plat_early_device_setup(void)
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{
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}
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void __init setup_arch(char **cmdline_p)
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{
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enable_mmu();
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ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
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printk(KERN_NOTICE "Boot params:\n"
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"... MOUNT_ROOT_RDONLY - %08lx\n"
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"... RAMDISK_FLAGS - %08lx\n"
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"... ORIG_ROOT_DEV - %08lx\n"
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"... LOADER_TYPE - %08lx\n"
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"... INITRD_START - %08lx\n"
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"... INITRD_SIZE - %08lx\n",
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MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
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ORIG_ROOT_DEV, LOADER_TYPE,
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INITRD_START, INITRD_SIZE);
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#ifdef CONFIG_BLK_DEV_RAM
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rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
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rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
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rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
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#endif
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if (!MOUNT_ROOT_RDONLY)
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root_mountflags &= ~MS_RDONLY;
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init_mm.start_code = (unsigned long) _text;
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init_mm.end_code = (unsigned long) _etext;
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init_mm.end_data = (unsigned long) _edata;
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init_mm.brk = (unsigned long) _end;
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code_resource.start = virt_to_phys(_text);
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code_resource.end = virt_to_phys(_etext)-1;
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data_resource.start = virt_to_phys(_etext);
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data_resource.end = virt_to_phys(_edata)-1;
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bss_resource.start = virt_to_phys(__bss_start);
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bss_resource.end = virt_to_phys(_ebss)-1;
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memory_start = (unsigned long)__va(__MEMORY_START);
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if (!memory_end)
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memory_end = memory_start + __MEMORY_SIZE;
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#ifdef CONFIG_CMDLINE_OVERWRITE
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strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
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#else
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strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
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#ifdef CONFIG_CMDLINE_EXTEND
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strlcat(command_line, " ", sizeof(command_line));
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strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line));
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#endif
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#endif
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/* Save unparsed command line copy for /proc/cmdline */
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memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
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*cmdline_p = command_line;
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parse_early_param();
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plat_early_device_setup();
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sh_mv_setup();
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/*
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* Find the highest page frame number we have available
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*/
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max_pfn = PFN_DOWN(__pa(memory_end));
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/*
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* Determine low and high memory ranges:
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*/
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max_low_pfn = max_pfn;
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min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
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nodes_clear(node_online_map);
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/* Setup bootmem with available RAM */
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lmb_init();
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setup_memory();
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sparse_init();
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#ifdef CONFIG_DUMMY_CONSOLE
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conswitchp = &dummy_con;
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#endif
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/* Perform the machine specific initialisation */
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if (likely(sh_mv.mv_setup))
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sh_mv.mv_setup(cmdline_p);
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paging_init();
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#ifdef CONFIG_SMP
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plat_smp_setup();
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#endif
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}
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/* processor boot mode configuration */
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int generic_mode_pins(void)
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{
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pr_warning("generic_mode_pins(): missing mode pin configuration\n");
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return 0;
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}
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int test_mode_pin(int pin)
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{
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return sh_mv.mv_mode_pins() & pin;
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}
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static const char *cpu_name[] = {
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[CPU_SH7201] = "SH7201",
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[CPU_SH7203] = "SH7203", [CPU_SH7263] = "SH7263",
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[CPU_SH7206] = "SH7206", [CPU_SH7619] = "SH7619",
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[CPU_SH7705] = "SH7705", [CPU_SH7706] = "SH7706",
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[CPU_SH7707] = "SH7707", [CPU_SH7708] = "SH7708",
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[CPU_SH7709] = "SH7709", [CPU_SH7710] = "SH7710",
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[CPU_SH7712] = "SH7712", [CPU_SH7720] = "SH7720",
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[CPU_SH7721] = "SH7721", [CPU_SH7729] = "SH7729",
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[CPU_SH7750] = "SH7750", [CPU_SH7750S] = "SH7750S",
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[CPU_SH7750R] = "SH7750R", [CPU_SH7751] = "SH7751",
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[CPU_SH7751R] = "SH7751R", [CPU_SH7760] = "SH7760",
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[CPU_SH4_202] = "SH4-202", [CPU_SH4_501] = "SH4-501",
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[CPU_SH7763] = "SH7763", [CPU_SH7770] = "SH7770",
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[CPU_SH7780] = "SH7780", [CPU_SH7781] = "SH7781",
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[CPU_SH7343] = "SH7343", [CPU_SH7785] = "SH7785",
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[CPU_SH7786] = "SH7786", [CPU_SH7757] = "SH7757",
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[CPU_SH7722] = "SH7722", [CPU_SHX3] = "SH-X3",
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[CPU_SH5_101] = "SH5-101", [CPU_SH5_103] = "SH5-103",
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[CPU_MXG] = "MX-G", [CPU_SH7723] = "SH7723",
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[CPU_SH7366] = "SH7366", [CPU_SH7724] = "SH7724",
|
|
[CPU_SH_NONE] = "Unknown"
|
|
};
|
|
|
|
const char *get_cpu_subtype(struct sh_cpuinfo *c)
|
|
{
|
|
return cpu_name[c->type];
|
|
}
|
|
EXPORT_SYMBOL(get_cpu_subtype);
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
/* Symbolic CPU flags, keep in sync with asm/cpu-features.h */
|
|
static const char *cpu_flags[] = {
|
|
"none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
|
|
"ptea", "llsc", "l2", "op32", "pteaex", NULL
|
|
};
|
|
|
|
static void show_cpuflags(struct seq_file *m, struct sh_cpuinfo *c)
|
|
{
|
|
unsigned long i;
|
|
|
|
seq_printf(m, "cpu flags\t:");
|
|
|
|
if (!c->flags) {
|
|
seq_printf(m, " %s\n", cpu_flags[0]);
|
|
return;
|
|
}
|
|
|
|
for (i = 0; cpu_flags[i]; i++)
|
|
if ((c->flags & (1 << i)))
|
|
seq_printf(m, " %s", cpu_flags[i+1]);
|
|
|
|
seq_printf(m, "\n");
|
|
}
|
|
|
|
static void show_cacheinfo(struct seq_file *m, const char *type,
|
|
struct cache_info info)
|
|
{
|
|
unsigned int cache_size;
|
|
|
|
cache_size = info.ways * info.sets * info.linesz;
|
|
|
|
seq_printf(m, "%s size\t: %2dKiB (%d-way)\n",
|
|
type, cache_size >> 10, info.ways);
|
|
}
|
|
|
|
/*
|
|
* Get CPU information for use by the procfs.
|
|
*/
|
|
static int show_cpuinfo(struct seq_file *m, void *v)
|
|
{
|
|
struct sh_cpuinfo *c = v;
|
|
unsigned int cpu = c - cpu_data;
|
|
|
|
if (!cpu_online(cpu))
|
|
return 0;
|
|
|
|
if (cpu == 0)
|
|
seq_printf(m, "machine\t\t: %s\n", get_system_type());
|
|
else
|
|
seq_printf(m, "\n");
|
|
|
|
seq_printf(m, "processor\t: %d\n", cpu);
|
|
seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine);
|
|
seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c));
|
|
if (c->cut_major == -1)
|
|
seq_printf(m, "cut\t\t: unknown\n");
|
|
else if (c->cut_minor == -1)
|
|
seq_printf(m, "cut\t\t: %d.x\n", c->cut_major);
|
|
else
|
|
seq_printf(m, "cut\t\t: %d.%d\n", c->cut_major, c->cut_minor);
|
|
|
|
show_cpuflags(m, c);
|
|
|
|
seq_printf(m, "cache type\t: ");
|
|
|
|
/*
|
|
* Check for what type of cache we have, we support both the
|
|
* unified cache on the SH-2 and SH-3, as well as the harvard
|
|
* style cache on the SH-4.
|
|
*/
|
|
if (c->icache.flags & SH_CACHE_COMBINED) {
|
|
seq_printf(m, "unified\n");
|
|
show_cacheinfo(m, "cache", c->icache);
|
|
} else {
|
|
seq_printf(m, "split (harvard)\n");
|
|
show_cacheinfo(m, "icache", c->icache);
|
|
show_cacheinfo(m, "dcache", c->dcache);
|
|
}
|
|
|
|
/* Optional secondary cache */
|
|
if (c->flags & CPU_HAS_L2_CACHE)
|
|
show_cacheinfo(m, "scache", c->scache);
|
|
|
|
seq_printf(m, "bogomips\t: %lu.%02lu\n",
|
|
c->loops_per_jiffy/(500000/HZ),
|
|
(c->loops_per_jiffy/(5000/HZ)) % 100);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
return *pos < NR_CPUS ? cpu_data + *pos : 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)
|
|
{
|
|
}
|
|
const struct seq_operations cpuinfo_op = {
|
|
.start = c_start,
|
|
.next = c_next,
|
|
.stop = c_stop,
|
|
.show = show_cpuinfo,
|
|
};
|
|
#endif /* CONFIG_PROC_FS */
|
|
|
|
struct dentry *sh_debugfs_root;
|
|
|
|
static int __init sh_debugfs_init(void)
|
|
{
|
|
sh_debugfs_root = debugfs_create_dir("sh", NULL);
|
|
if (!sh_debugfs_root)
|
|
return -ENOMEM;
|
|
if (IS_ERR(sh_debugfs_root))
|
|
return PTR_ERR(sh_debugfs_root);
|
|
|
|
return 0;
|
|
}
|
|
arch_initcall(sh_debugfs_init);
|