| /* |
| * linux/arch/m32r/kernel/setup.c |
| * |
| * Setup routines for Renesas M32R |
| * |
| * Copyright (c) 2001, 2002 Hiroyuki Kondo, Hirokazu Takata, |
| * Hitoshi Yamamoto |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/stddef.h> |
| #include <linux/fs.h> |
| #include <linux/sched.h> |
| #include <linux/ioport.h> |
| #include <linux/mm.h> |
| #include <linux/bootmem.h> |
| #include <linux/console.h> |
| #include <linux/initrd.h> |
| #include <linux/major.h> |
| #include <linux/root_dev.h> |
| #include <linux/seq_file.h> |
| #include <linux/timex.h> |
| #include <linux/screen_info.h> |
| #include <linux/cpu.h> |
| #include <linux/nodemask.h> |
| #include <linux/pfn.h> |
| |
| #include <asm/processor.h> |
| #include <asm/pgtable.h> |
| #include <asm/io.h> |
| #include <asm/mmu_context.h> |
| #include <asm/m32r.h> |
| #include <asm/setup.h> |
| #include <asm/sections.h> |
| |
| #ifdef CONFIG_MMU |
| extern void init_mmu(void); |
| #endif |
| |
| extern char _end[]; |
| |
| /* |
| * Machine setup.. |
| */ |
| struct cpuinfo_m32r boot_cpu_data; |
| |
| #ifdef CONFIG_BLK_DEV_RAM |
| extern int rd_doload; /* 1 = load ramdisk, 0 = don't load */ |
| extern int rd_prompt; /* 1 = prompt for ramdisk, 0 = don't prompt */ |
| extern int rd_image_start; /* starting block # of image */ |
| #endif |
| |
| #if defined(CONFIG_VGA_CONSOLE) |
| struct screen_info screen_info = { |
| .orig_video_lines = 25, |
| .orig_video_cols = 80, |
| .orig_video_mode = 0, |
| .orig_video_ega_bx = 0, |
| .orig_video_isVGA = 1, |
| .orig_video_points = 8 |
| }; |
| #endif |
| |
| extern int root_mountflags; |
| |
| static char command_line[COMMAND_LINE_SIZE]; |
| |
| static struct resource data_resource = { |
| .name = "Kernel data", |
| .start = 0, |
| .end = 0, |
| .flags = IORESOURCE_BUSY | IORESOURCE_MEM |
| }; |
| |
| static struct resource code_resource = { |
| .name = "Kernel code", |
| .start = 0, |
| .end = 0, |
| .flags = IORESOURCE_BUSY | IORESOURCE_MEM |
| }; |
| |
| unsigned long memory_start; |
| unsigned long memory_end; |
| |
| void __init setup_arch(char **); |
| int get_cpuinfo(char *); |
| |
| static __inline__ void parse_mem_cmdline(char ** cmdline_p) |
| { |
| char c = ' '; |
| char *to = command_line; |
| char *from = COMMAND_LINE; |
| int len = 0; |
| int usermem = 0; |
| |
| /* Save unparsed command line copy for /proc/cmdline */ |
| memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); |
| saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; |
| |
| memory_start = (unsigned long)CONFIG_MEMORY_START+PAGE_OFFSET; |
| memory_end = memory_start+(unsigned long)CONFIG_MEMORY_SIZE; |
| |
| for ( ; ; ) { |
| if (c == ' ' && !memcmp(from, "mem=", 4)) { |
| if (to != command_line) |
| to--; |
| |
| { |
| unsigned long mem_size; |
| |
| usermem = 1; |
| mem_size = memparse(from+4, &from); |
| memory_end = memory_start + mem_size; |
| } |
| } |
| c = *(from++); |
| if (!c) |
| break; |
| |
| if (COMMAND_LINE_SIZE <= ++len) |
| break; |
| |
| *(to++) = c; |
| } |
| *to = '\0'; |
| *cmdline_p = command_line; |
| if (usermem) |
| printk(KERN_INFO "user-defined physical RAM map:\n"); |
| } |
| |
| #ifndef CONFIG_DISCONTIGMEM |
| static unsigned long __init setup_memory(void) |
| { |
| unsigned long start_pfn, max_low_pfn, bootmap_size; |
| |
| start_pfn = PFN_UP( __pa(_end) ); |
| max_low_pfn = PFN_DOWN( __pa(memory_end) ); |
| |
| /* |
| * Initialize the boot-time allocator (with low memory only): |
| */ |
| bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn, |
| CONFIG_MEMORY_START>>PAGE_SHIFT, max_low_pfn); |
| |
| /* |
| * Register fully available low RAM pages with the bootmem allocator. |
| */ |
| { |
| unsigned long curr_pfn; |
| unsigned long last_pfn; |
| unsigned long pages; |
| |
| /* |
| * We are rounding up the start address of usable memory: |
| */ |
| curr_pfn = PFN_UP(__pa(memory_start)); |
| |
| /* |
| * ... and at the end of the usable range downwards: |
| */ |
| last_pfn = PFN_DOWN(__pa(memory_end)); |
| |
| if (last_pfn > max_low_pfn) |
| last_pfn = max_low_pfn; |
| |
| pages = last_pfn - curr_pfn; |
| free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages)); |
| } |
| |
| /* |
| * Reserve the kernel text and |
| * Reserve the bootmem bitmap. We do this in two steps (first step |
| * was init_bootmem()), because this catches the (definitely buggy) |
| * case of us accidentally initializing the bootmem allocator with |
| * an invalid RAM area. |
| */ |
| reserve_bootmem(CONFIG_MEMORY_START + PAGE_SIZE, |
| (PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE - 1) |
| - CONFIG_MEMORY_START); |
| |
| /* |
| * reserve physical page 0 - it's a special BIOS page on many boxes, |
| * enabling clean reboots, SMP operation, laptop functions. |
| */ |
| reserve_bootmem(CONFIG_MEMORY_START, PAGE_SIZE); |
| |
| /* |
| * reserve memory hole |
| */ |
| #ifdef CONFIG_MEMHOLE |
| reserve_bootmem(CONFIG_MEMHOLE_START, CONFIG_MEMHOLE_SIZE); |
| #endif |
| |
| #ifdef CONFIG_BLK_DEV_INITRD |
| if (LOADER_TYPE && INITRD_START) { |
| if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) { |
| reserve_bootmem(INITRD_START, INITRD_SIZE); |
| initrd_start = INITRD_START + PAGE_OFFSET; |
| initrd_end = initrd_start + INITRD_SIZE; |
| printk("initrd:start[%08lx],size[%08lx]\n", |
| initrd_start, INITRD_SIZE); |
| } else { |
| printk("initrd extends beyond end of memory " |
| "(0x%08lx > 0x%08lx)\ndisabling initrd\n", |
| INITRD_START + INITRD_SIZE, |
| max_low_pfn << PAGE_SHIFT); |
| |
| initrd_start = 0; |
| } |
| } |
| #endif |
| |
| return max_low_pfn; |
| } |
| #else /* CONFIG_DISCONTIGMEM */ |
| extern unsigned long setup_memory(void); |
| #endif /* CONFIG_DISCONTIGMEM */ |
| |
| void __init setup_arch(char **cmdline_p) |
| { |
| ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); |
| |
| boot_cpu_data.cpu_clock = M32R_CPUCLK; |
| boot_cpu_data.bus_clock = M32R_BUSCLK; |
| boot_cpu_data.timer_divide = M32R_TIMER_DIVIDE; |
| |
| #ifdef CONFIG_BLK_DEV_RAM |
| rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; |
| rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); |
| rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); |
| #endif |
| |
| if (!MOUNT_ROOT_RDONLY) |
| root_mountflags &= ~MS_RDONLY; |
| |
| #ifdef CONFIG_VT |
| #if defined(CONFIG_VGA_CONSOLE) |
| conswitchp = &vga_con; |
| #elif defined(CONFIG_DUMMY_CONSOLE) |
| conswitchp = &dummy_con; |
| #endif |
| #endif |
| |
| #ifdef CONFIG_DISCONTIGMEM |
| nodes_clear(node_online_map); |
| node_set_online(0); |
| node_set_online(1); |
| #endif /* CONFIG_DISCONTIGMEM */ |
| |
| init_mm.start_code = (unsigned long) _text; |
| init_mm.end_code = (unsigned long) _etext; |
| init_mm.end_data = (unsigned long) _edata; |
| init_mm.brk = (unsigned long) _end; |
| |
| code_resource.start = virt_to_phys(_text); |
| code_resource.end = virt_to_phys(_etext)-1; |
| data_resource.start = virt_to_phys(_etext); |
| data_resource.end = virt_to_phys(_edata)-1; |
| |
| parse_mem_cmdline(cmdline_p); |
| |
| setup_memory(); |
| |
| paging_init(); |
| } |
| |
| static struct cpu cpu_devices[NR_CPUS]; |
| |
| static int __init topology_init(void) |
| { |
| int i; |
| |
| for_each_present_cpu(i) |
| register_cpu(&cpu_devices[i], i); |
| |
| return 0; |
| } |
| |
| subsys_initcall(topology_init); |
| |
| #ifdef CONFIG_PROC_FS |
| /* |
| * Get CPU information for use by the procfs. |
| */ |
| static int show_cpuinfo(struct seq_file *m, void *v) |
| { |
| struct cpuinfo_m32r *c = v; |
| unsigned long cpu = c - cpu_data; |
| |
| #ifdef CONFIG_SMP |
| if (!cpu_online(cpu)) |
| return 0; |
| #endif /* CONFIG_SMP */ |
| |
| seq_printf(m, "processor\t: %ld\n", cpu); |
| |
| #if defined(CONFIG_CHIP_VDEC2) |
| seq_printf(m, "cpu family\t: VDEC2\n" |
| "cache size\t: Unknown\n"); |
| #elif defined(CONFIG_CHIP_M32700) |
| seq_printf(m,"cpu family\t: M32700\n" |
| "cache size\t: I-8KB/D-8KB\n"); |
| #elif defined(CONFIG_CHIP_M32102) |
| seq_printf(m,"cpu family\t: M32102\n" |
| "cache size\t: I-8KB\n"); |
| #elif defined(CONFIG_CHIP_OPSP) |
| seq_printf(m,"cpu family\t: OPSP\n" |
| "cache size\t: I-8KB/D-8KB\n"); |
| #elif defined(CONFIG_CHIP_MP) |
| seq_printf(m, "cpu family\t: M32R-MP\n" |
| "cache size\t: I-xxKB/D-xxKB\n"); |
| #elif defined(CONFIG_CHIP_M32104) |
| seq_printf(m,"cpu family\t: M32104\n" |
| "cache size\t: I-8KB/D-8KB\n"); |
| #else |
| seq_printf(m, "cpu family\t: Unknown\n"); |
| #endif |
| seq_printf(m, "bogomips\t: %lu.%02lu\n", |
| c->loops_per_jiffy/(500000/HZ), |
| (c->loops_per_jiffy/(5000/HZ)) % 100); |
| #if defined(CONFIG_PLAT_MAPPI) |
| seq_printf(m, "Machine\t\t: Mappi Evaluation board\n"); |
| #elif defined(CONFIG_PLAT_MAPPI2) |
| seq_printf(m, "Machine\t\t: Mappi-II Evaluation board\n"); |
| #elif defined(CONFIG_PLAT_MAPPI3) |
| seq_printf(m, "Machine\t\t: Mappi-III Evaluation board\n"); |
| #elif defined(CONFIG_PLAT_M32700UT) |
| seq_printf(m, "Machine\t\t: M32700UT Evaluation board\n"); |
| #elif defined(CONFIG_PLAT_OPSPUT) |
| seq_printf(m, "Machine\t\t: OPSPUT Evaluation board\n"); |
| #elif defined(CONFIG_PLAT_USRV) |
| seq_printf(m, "Machine\t\t: uServer\n"); |
| #elif defined(CONFIG_PLAT_OAKS32R) |
| seq_printf(m, "Machine\t\t: OAKS32R\n"); |
| #elif defined(CONFIG_PLAT_M32104UT) |
| seq_printf(m, "Machine\t\t: M3T-M32104UT uT Engine board\n"); |
| #else |
| seq_printf(m, "Machine\t\t: Unknown\n"); |
| #endif |
| |
| #define PRINT_CLOCK(name, value) \ |
| seq_printf(m, name " clock\t: %d.%02dMHz\n", \ |
| ((value) / 1000000), ((value) % 1000000)/10000) |
| |
| PRINT_CLOCK("CPU", (int)c->cpu_clock); |
| PRINT_CLOCK("Bus", (int)c->bus_clock); |
| |
| seq_printf(m, "\n"); |
| |
| 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) |
| { |
| } |
| |
| struct seq_operations cpuinfo_op = { |
| .start = c_start, |
| .next = c_next, |
| .stop = c_stop, |
| .show = show_cpuinfo, |
| }; |
| #endif /* CONFIG_PROC_FS */ |
| |
| unsigned long cpu_initialized __initdata = 0; |
| |
| /* |
| * cpu_init() initializes state that is per-CPU. Some data is already |
| * initialized (naturally) in the bootstrap process. |
| * We reload them nevertheless, this function acts as a |
| * 'CPU state barrier', nothing should get across. |
| */ |
| #if defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_XNUX2) \ |
| || defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_M32102) \ |
| || defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104) |
| void __init cpu_init (void) |
| { |
| int cpu_id = smp_processor_id(); |
| |
| if (test_and_set_bit(cpu_id, &cpu_initialized)) { |
| printk(KERN_WARNING "CPU#%d already initialized!\n", cpu_id); |
| for ( ; ; ) |
| local_irq_enable(); |
| } |
| printk(KERN_INFO "Initializing CPU#%d\n", cpu_id); |
| |
| /* Set up and load the per-CPU TSS and LDT */ |
| atomic_inc(&init_mm.mm_count); |
| current->active_mm = &init_mm; |
| if (current->mm) |
| BUG(); |
| |
| /* Force FPU initialization */ |
| current_thread_info()->status = 0; |
| clear_used_math(); |
| |
| #ifdef CONFIG_MMU |
| /* Set up MMU */ |
| init_mmu(); |
| #endif |
| |
| /* Set up ICUIMASK */ |
| outl(0x00070000, M32R_ICU_IMASK_PORTL); /* imask=111 */ |
| } |
| #endif /* defined(CONFIG_CHIP_VDEC2) ... */ |