// SPDX-License-Identifier: GPL-2.0 /* * linux/arch/m68knommu/kernel/setup.c * * Copyright (C) 1999-2007 Greg Ungerer (gerg@snapgear.com) * Copyright (C) 1998,1999 D. Jeff Dionne * Copyleft ()) 2000 James D. Schettine {james@telos-systems.com} * Copyright (C) 1998 Kenneth Albanowski * Copyright (C) 1995 Hamish Macdonald * Copyright (C) 2000 Lineo Inc. (www.lineo.com) * Copyright (C) 2001 Lineo, Inc. * * 68VZ328 Fixes/support Evan Stawnyczy */ /* * This file handles the architecture-dependent parts of system setup */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include unsigned long memory_start; unsigned long memory_end; EXPORT_SYMBOL(memory_start); EXPORT_SYMBOL(memory_end); char __initdata command_line[COMMAND_LINE_SIZE]; /* machine dependent timer functions */ void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL; int (*mach_set_clock_mmss)(unsigned long); int (*mach_hwclk) (int, struct rtc_time*); /* machine dependent reboot functions */ void (*mach_reset)(void); void (*mach_halt)(void); void (*mach_power_off)(void); #ifdef CONFIG_M68000 #if defined(CONFIG_M68328) #define CPU_NAME "MC68328" #elif defined(CONFIG_M68EZ328) #define CPU_NAME "MC68EZ328" #elif defined(CONFIG_M68VZ328) #define CPU_NAME "MC68VZ328" #else #define CPU_NAME "MC68000" #endif #endif /* CONFIG_M68000 */ #ifndef CPU_NAME #define CPU_NAME "UNKNOWN" #endif /* * Different cores have different instruction execution timings. * The old/traditional 68000 cores are basically all the same, at 16. * The ColdFire cores vary a little, their values are defined in their * headers. We default to the standard 68000 value here. */ #ifndef CPU_INSTR_PER_JIFFY #define CPU_INSTR_PER_JIFFY 16 #endif void __init setup_arch(char **cmdline_p) { int bootmap_size; memory_start = PAGE_ALIGN(_ramstart); memory_end = _ramend; init_mm.start_code = (unsigned long) &_stext; init_mm.end_code = (unsigned long) &_etext; init_mm.end_data = (unsigned long) &_edata; init_mm.brk = (unsigned long) 0; config_BSP(&command_line[0], sizeof(command_line)); #if defined(CONFIG_BOOTPARAM) strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line)); command_line[sizeof(command_line) - 1] = 0; #endif /* CONFIG_BOOTPARAM */ process_uboot_commandline(&command_line[0], sizeof(command_line)); pr_info("uClinux with CPU " CPU_NAME "\n"); #ifdef CONFIG_UCDIMM pr_info("uCdimm by Lineo, Inc. \n"); #endif #ifdef CONFIG_M68VZ328 pr_info("M68VZ328 support by Evan Stawnyczy \n"); #endif #ifdef CONFIG_COLDFIRE pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n"); #ifdef CONFIG_M5307 pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n"); #endif #ifdef CONFIG_ELITE pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n"); #endif #endif pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n"); #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 ) pr_info("TRG SuperPilot FLASH card support \n"); #endif #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 ) pr_info("PalmV support by Lineo Inc. \n"); #endif #ifdef CONFIG_DRAGEN2 pr_info("DragonEngine II board support by Georges Menie\n"); #endif #ifdef CONFIG_M5235EVB pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n"); #endif pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n", _stext, _etext, _sdata, _edata, __bss_start, __bss_stop); pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ", __bss_stop, memory_start, memory_start, memory_end); /* Keep a copy of command line */ *cmdline_p = &command_line[0]; memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); boot_command_line[COMMAND_LINE_SIZE-1] = 0; #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE) conswitchp = &dummy_con; #endif /* * Give all the memory to the bootmap allocator, tell it to put the * boot mem_map at the start of memory. */ min_low_pfn = PFN_DOWN(memory_start); max_pfn = max_low_pfn = PFN_DOWN(memory_end); bootmap_size = init_bootmem_node( NODE_DATA(0), min_low_pfn, /* map goes here */ PFN_DOWN(PAGE_OFFSET), max_pfn); /* * Free the usable memory, we have to make sure we do not free * the bootmem bitmap so we then reserve it after freeing it :-) */ free_bootmem(memory_start, memory_end - memory_start); reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT); #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD) if ((initrd_start > 0) && (initrd_start < initrd_end) && (initrd_end < memory_end)) reserve_bootmem(initrd_start, initrd_end - initrd_start, BOOTMEM_DEFAULT); #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ /* * Get kmalloc into gear. */ paging_init(); } /* * Get CPU information for use by the procfs. */ static int show_cpuinfo(struct seq_file *m, void *v) { char *cpu, *mmu, *fpu; u_long clockfreq; cpu = CPU_NAME; mmu = "none"; fpu = "none"; clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY; seq_printf(m, "CPU:\t\t%s\n" "MMU:\t\t%s\n" "FPU:\t\t%s\n" "Clocking:\t%lu.%1luMHz\n" "BogoMips:\t%lu.%02lu\n" "Calibration:\t%lu loops\n", cpu, mmu, fpu, clockfreq / 1000000, (clockfreq / 100000) % 10, (loops_per_jiffy * HZ) / 500000, ((loops_per_jiffy * HZ) / 5000) % 100, (loops_per_jiffy * HZ)); return 0; } static void *c_start(struct seq_file *m, loff_t *pos) { return *pos < NR_CPUS ? ((void *) 0x12345678) : 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, };