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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 02:19:51 +00:00
![Arnd Bergmann](/assets/img/avatar_default.png)
A number of architectures either kept the screen_info definition for historical purposes as it used to be required by the generic VT code, or they copied it from another architecture in order to build the VGA console driver in an allmodconfig build. The mips definition is used by some platforms, but the initialization on jazz is not needed. Now that vgacon no longer builds on these architectures, remove the stale definitions and initializations. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Acked-by: Dinh Nguyen <dinguyen@kernel.org> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Acked-by: Guo Ren <guoren@kernel.org> Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20231009211845.3136536-5-arnd@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
406 lines
9.3 KiB
C
406 lines
9.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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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/ioport.h>
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#include <linux/init.h>
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#include <linux/initrd.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 <linux/of.h>
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#include <linux/of_fdt.h>
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#include <linux/uaccess.h>
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#include <uapi/linux/mount.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/processor.h>
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#include <asm/sparsemem.h>
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#include <asm/platform_early.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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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_SYSTEM_RAM,
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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_SYSTEM_RAM,
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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_SYSTEM_RAM,
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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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#ifndef CONFIG_GENERIC_CALIBRATE_DELAY
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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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#endif
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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_SYSTEM_RAM | 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), PFN_PHYS(end_pfn - start_pfn),
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&memblock.memory, 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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#ifdef CONFIG_OF_EARLY_FLATTREE
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void __ref sh_fdt_init(phys_addr_t dt_phys)
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{
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static int done = 0;
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void *dt_virt;
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/* Avoid calling an __init function on secondary cpus. */
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if (done) return;
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#ifdef CONFIG_USE_BUILTIN_DTB
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dt_virt = __dtb_start;
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#else
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dt_virt = phys_to_virt(dt_phys);
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#endif
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if (!dt_virt || !early_init_dt_scan(dt_virt)) {
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pr_crit("Error: invalid device tree blob"
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" at physical address %p\n", (void *)dt_phys);
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while (true)
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cpu_relax();
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}
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done = 1;
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}
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#endif
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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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#endif
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if (!MOUNT_ROOT_RDONLY)
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root_mountflags &= ~MS_RDONLY;
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setup_initial_init_mm(_text, _etext, _edata, _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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strscpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
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#else
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strscpy(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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sh_early_platform_driver_probe("earlyprintk", 1, 1);
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#ifdef CONFIG_OF_EARLY_FLATTREE
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#ifdef CONFIG_USE_BUILTIN_DTB
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unflatten_and_copy_device_tree();
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#else
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unflatten_device_tree();
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#endif
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#endif
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paging_init();
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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_warn("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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void __init arch_cpu_finalize_init(void)
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{
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char *p = &init_utsname()->machine[2]; /* "sh" */
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select_idle_routine();
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current_cpu_data.loops_per_jiffy = loops_per_jiffy;
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switch (current_cpu_data.family) {
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case CPU_FAMILY_SH2:
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*p++ = '2';
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break;
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case CPU_FAMILY_SH2A:
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*p++ = '2';
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*p++ = 'a';
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break;
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case CPU_FAMILY_SH3:
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*p++ = '3';
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break;
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case CPU_FAMILY_SH4:
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*p++ = '4';
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break;
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case CPU_FAMILY_SH4A:
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*p++ = '4';
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*p++ = 'a';
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break;
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case CPU_FAMILY_SH4AL_DSP:
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*p++ = '4';
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*p++ = 'a';
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*p++ = 'l';
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*p++ = '-';
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*p++ = 'd';
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*p++ = 's';
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*p++ = 'p';
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break;
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case CPU_FAMILY_UNKNOWN:
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/*
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* Specifically use CPU_FAMILY_UNKNOWN rather than
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* default:, so we're able to have the compiler whine
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* about unhandled enumerations.
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*/
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break;
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}
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pr_info("CPU: %s\n", get_cpu_subtype(¤t_cpu_data));
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#ifndef __LITTLE_ENDIAN__
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/* 'eb' means 'Endian Big' */
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*p++ = 'e';
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*p++ = 'b';
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#endif
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*p = '\0';
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}
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