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4603f53a1d
The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications. For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.
After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out. Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.
Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
are flagged as __cpuinit -- so if we remove the __cpuinit from
arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
content into no-ops as early as possible, since that will get rid
of these warnings. In any case, they are temporary and harmless.
This removes all the arch/sh uses of the __cpuinit macros from
all C files. Currently sh does not have any __CPUINIT used in
assembly files.
[1] https://lkml.org/lkml/2013/5/20/589
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: linux-sh@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
325 lines
7.9 KiB
C
325 lines
7.9 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 - 2010 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/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/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/memblock.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/smp.h>
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#include <asm/mmu_context.h>
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#include <asm/mmzone.h>
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#include <asm/sparsemem.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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.phys_bits = MAX_PHYSMEM_BITS,
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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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unsigned long memory_limit = 0;
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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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if (!p)
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return 1;
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memory_limit = PAGE_ALIGN(memparse(p, &p));
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pr_notice("Memory limited to %ldMB\n", memory_limit >> 20);
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return 0;
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}
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early_param("mem", early_parse_mem);
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void __init check_for_initrd(void)
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{
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#ifdef CONFIG_BLK_DEV_INITRD
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unsigned long start, end;
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/*
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* Check for the rare cases where boot loaders adhere to the boot
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* ABI.
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*/
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if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE)
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goto disable;
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start = INITRD_START + __MEMORY_START;
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end = start + INITRD_SIZE;
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if (unlikely(end <= start))
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goto disable;
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if (unlikely(start & ~PAGE_MASK)) {
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pr_err("initrd must be page aligned\n");
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goto disable;
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}
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if (unlikely(start < __MEMORY_START)) {
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pr_err("initrd start (%08lx) < __MEMORY_START(%x)\n",
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start, __MEMORY_START);
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goto disable;
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}
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if (unlikely(end > memblock_end_of_DRAM())) {
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pr_err("initrd extends beyond end of memory "
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"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
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end, (unsigned long)memblock_end_of_DRAM());
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goto disable;
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}
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/*
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* If we got this far in spite of the boot loader's best efforts
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* to the contrary, assume we actually have a valid initrd and
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* fix up the root dev.
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*/
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ROOT_DEV = Root_RAM0;
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/*
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* Address sanitization
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*/
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initrd_start = (unsigned long)__va(start);
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initrd_end = initrd_start + INITRD_SIZE;
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memblock_reserve(__pa(initrd_start), INITRD_SIZE);
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return;
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disable:
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pr_info("initrd disabled\n");
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initrd_start = initrd_end = 0;
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#endif
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}
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void 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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unsigned long start, end;
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WARN_ON(res->name); /* max one active range per node for now */
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start = start_pfn << PAGE_SHIFT;
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end = end_pfn << PAGE_SHIFT;
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res->name = "System RAM";
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res->start = start;
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res->end = end - 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 or
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* the reserved crashkernel region, so try it repeatedly
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* and let the resource manager 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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#ifdef CONFIG_KEXEC
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request_resource(res, &crashk_res);
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#endif
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/*
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* Also make sure that there is a PMB mapping that covers this
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* range before we attempt to activate it, to avoid reset by MMU.
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* We can hit this path with NUMA or memory hot-add.
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*/
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pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
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PAGE_KERNEL);
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memblock_set_node(PFN_PHYS(start_pfn),
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PFN_PHYS(end_pfn - start_pfn), nid);
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}
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void __init __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(__bss_stop)-1;
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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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/* Let earlyprintk output early console messages */
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early_platform_driver_probe("earlyprintk", 1, 1);
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paging_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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plat_smp_setup();
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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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