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Diffstat (limited to 'arch/cris/kernel/setup.c')
| -rw-r--r-- | arch/cris/kernel/setup.c | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/arch/cris/kernel/setup.c b/arch/cris/kernel/setup.c deleted file mode 100644 index 1b61a7207afb..000000000000 --- a/arch/cris/kernel/setup.c +++ /dev/null @@ -1,214 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * - * linux/arch/cris/kernel/setup.c - * - * Copyright (C) 1995 Linus Torvalds - * Copyright (c) 2001 Axis Communications AB - */ - -/* - * This file handles the architecture-dependent parts of initialization - */ - -#include <linux/init.h> -#include <linux/mm.h> -#include <linux/bootmem.h> -#include <asm/pgtable.h> -#include <linux/seq_file.h> -#include <linux/screen_info.h> -#include <linux/utsname.h> -#include <linux/pfn.h> -#include <linux/cpu.h> -#include <linux/of.h> -#include <linux/of_fdt.h> -#include <asm/setup.h> -#include <arch/system.h> -#include <asm/sections.h> - -/* - * Setup options - */ -struct screen_info screen_info; - -extern int root_mountflags; - -char __initdata cris_command_line[COMMAND_LINE_SIZE] = { 0, }; - -extern const unsigned long text_start, edata; /* set by the linker script */ -extern unsigned long dram_start, dram_end; - -extern unsigned long romfs_start, romfs_length, romfs_in_flash; /* from head.S */ - -static struct cpu cpu_devices[NR_CPUS]; - -extern void show_etrax_copyright(void); /* arch-vX/kernel/setup.c */ - -/* This mainly sets up the memory area, and can be really confusing. - * - * The physical DRAM is virtually mapped into dram_start to dram_end - * (usually c0000000 to c0000000 + DRAM size). The physical address is - * given by the macro __pa(). - * - * In this DRAM, the kernel code and data is loaded, in the beginning. - * It really starts at c0004000 to make room for some special pages - - * the start address is text_start. The kernel data ends at _end. After - * this the ROM filesystem is appended (if there is any). - * - * Between this address and dram_end, we have RAM pages usable to the - * boot code and the system. - * - */ - -void __init setup_arch(char **cmdline_p) -{ - extern void init_etrax_debug(void); - unsigned long bootmap_size; - unsigned long start_pfn, max_pfn; - unsigned long memory_start; - -#ifdef CONFIG_OF - early_init_dt_scan(__dtb_start); -#endif - - /* register an initial console printing routine for printk's */ - - init_etrax_debug(); - - /* we should really poll for DRAM size! */ - - high_memory = &dram_end; - - if(romfs_in_flash || !romfs_length) { - /* if we have the romfs in flash, or if there is no rom filesystem, - * our free area starts directly after the BSS - */ - memory_start = (unsigned long) &_end; - } else { - /* otherwise the free area starts after the ROM filesystem */ - printk("ROM fs in RAM, size %lu bytes\n", romfs_length); - memory_start = romfs_start + romfs_length; - } - - /* process 1's initial memory region is the kernel code/data */ - - init_mm.start_code = (unsigned long) &text_start; - init_mm.end_code = (unsigned long) &_etext; - init_mm.end_data = (unsigned long) &_edata; - init_mm.brk = (unsigned long) &_end; - - /* min_low_pfn points to the start of DRAM, start_pfn points - * to the first DRAM pages after the kernel, and max_low_pfn - * to the end of DRAM. - */ - - /* - * partially used pages are not usable - thus - * we are rounding upwards: - */ - - start_pfn = PFN_UP(memory_start); /* usually c0000000 + kernel + romfs */ - max_pfn = PFN_DOWN((unsigned long)high_memory); /* usually c0000000 + dram size */ - - /* - * Initialize the boot-time allocator (start, end) - * - * We give it access to all our DRAM, but we could as well just have - * given it a small slice. No point in doing that though, unless we - * have non-contiguous memory and want the boot-stuff to be in, say, - * the smallest area. - * - * It will put a bitmap of the allocated pages in the beginning - * of the range we give it, but it won't mark the bitmaps pages - * as reserved. We have to do that ourselves below. - * - * We need to use init_bootmem_node instead of init_bootmem - * because our map starts at a quite high address (min_low_pfn). - */ - - max_low_pfn = max_pfn; - min_low_pfn = PAGE_OFFSET >> PAGE_SHIFT; - - bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn, - min_low_pfn, - max_low_pfn); - - /* And free all memory not belonging to the kernel (addr, size) */ - - free_bootmem(PFN_PHYS(start_pfn), PFN_PHYS(max_pfn - start_pfn)); - - /* - * Reserve the bootmem bitmap itself as well. We do this in two - * steps (first step was init_bootmem()) because this catches - * the (very unlikely) case of us accidentally initializing the - * bootmem allocator with an invalid RAM area. - * - * Arguments are start, size - */ - - reserve_bootmem(PFN_PHYS(start_pfn), bootmap_size, BOOTMEM_DEFAULT); - - unflatten_and_copy_device_tree(); - - /* paging_init() sets up the MMU and marks all pages as reserved */ - - paging_init(); - - *cmdline_p = cris_command_line; - -#ifdef CONFIG_ETRAX_CMDLINE - if (!strcmp(cris_command_line, "")) { - strlcpy(cris_command_line, CONFIG_ETRAX_CMDLINE, COMMAND_LINE_SIZE); - cris_command_line[COMMAND_LINE_SIZE - 1] = '\0'; - } -#endif - - /* Save command line for future references. */ - memcpy(boot_command_line, cris_command_line, COMMAND_LINE_SIZE); - boot_command_line[COMMAND_LINE_SIZE - 1] = '\0'; - - /* give credit for the CRIS port */ - show_etrax_copyright(); - - /* Setup utsname */ - strcpy(init_utsname()->machine, cris_machine_name); -} - -#ifdef CONFIG_PROC_FS -static void *c_start(struct seq_file *m, loff_t *pos) -{ - return *pos < nr_cpu_ids ? (void *)(int)(*pos + 1) : 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) -{ -} - -extern int show_cpuinfo(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 */ - -static int __init topology_init(void) -{ - int i; - - for_each_possible_cpu(i) { - return register_cpu(&cpu_devices[i], i); - } - - return 0; -} - -subsys_initcall(topology_init); |