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