diff options
Diffstat (limited to 'arch/avr32/kernel/setup.c')
| -rw-r--r-- | arch/avr32/kernel/setup.c | 609 |
1 files changed, 0 insertions, 609 deletions
diff --git a/arch/avr32/kernel/setup.c b/arch/avr32/kernel/setup.c deleted file mode 100644 index e6928896da2a..000000000000 --- a/arch/avr32/kernel/setup.c +++ /dev/null @@ -1,609 +0,0 @@ -/* - * Copyright (C) 2004-2006 Atmel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/clk.h> -#include <linux/init.h> -#include <linux/initrd.h> -#include <linux/sched.h> -#include <linux/console.h> -#include <linux/ioport.h> -#include <linux/bootmem.h> -#include <linux/fs.h> -#include <linux/module.h> -#include <linux/pfn.h> -#include <linux/root_dev.h> -#include <linux/cpu.h> -#include <linux/kernel.h> - -#include <asm/sections.h> -#include <asm/processor.h> -#include <asm/pgtable.h> -#include <asm/setup.h> -#include <asm/sysreg.h> - -#include <mach/board.h> -#include <mach/init.h> - -extern int root_mountflags; - -/* - * Initialize loops_per_jiffy as 5000000 (500MIPS). - * Better make it too large than too small... - */ -struct avr32_cpuinfo boot_cpu_data = { - .loops_per_jiffy = 5000000 -}; -EXPORT_SYMBOL(boot_cpu_data); - -static char __initdata command_line[COMMAND_LINE_SIZE]; - -/* - * Standard memory resources - */ -static struct resource __initdata kernel_data = { - .name = "Kernel data", - .start = 0, - .end = 0, - .flags = IORESOURCE_SYSTEM_RAM, -}; -static struct resource __initdata kernel_code = { - .name = "Kernel code", - .start = 0, - .end = 0, - .flags = IORESOURCE_SYSTEM_RAM, - .sibling = &kernel_data, -}; - -/* - * Available system RAM and reserved regions as singly linked - * lists. These lists are traversed using the sibling pointer in - * struct resource and are kept sorted at all times. - */ -static struct resource *__initdata system_ram; -static struct resource *__initdata reserved = &kernel_code; - -/* - * We need to allocate these before the bootmem allocator is up and - * running, so we need this "cache". 32 entries are probably enough - * for all but the most insanely complex systems. - */ -static struct resource __initdata res_cache[32]; -static unsigned int __initdata res_cache_next_free; - -static void __init resource_init(void) -{ - struct resource *mem, *res; - struct resource *new; - - kernel_code.start = __pa(init_mm.start_code); - - for (mem = system_ram; mem; mem = mem->sibling) { - new = alloc_bootmem_low(sizeof(struct resource)); - memcpy(new, mem, sizeof(struct resource)); - - new->sibling = NULL; - if (request_resource(&iomem_resource, new)) - printk(KERN_WARNING "Bad RAM resource %08x-%08x\n", - mem->start, mem->end); - } - - for (res = reserved; res; res = res->sibling) { - new = alloc_bootmem_low(sizeof(struct resource)); - memcpy(new, res, sizeof(struct resource)); - - new->sibling = NULL; - if (insert_resource(&iomem_resource, new)) - printk(KERN_WARNING - "Bad reserved resource %s (%08x-%08x)\n", - res->name, res->start, res->end); - } -} - -static void __init -add_physical_memory(resource_size_t start, resource_size_t end) -{ - struct resource *new, *next, **pprev; - - for (pprev = &system_ram, next = system_ram; next; - pprev = &next->sibling, next = next->sibling) { - if (end < next->start) - break; - if (start <= next->end) { - printk(KERN_WARNING - "Warning: Physical memory map is broken\n"); - printk(KERN_WARNING - "Warning: %08x-%08x overlaps %08x-%08x\n", - start, end, next->start, next->end); - return; - } - } - - if (res_cache_next_free >= ARRAY_SIZE(res_cache)) { - printk(KERN_WARNING - "Warning: Failed to add physical memory %08x-%08x\n", - start, end); - return; - } - - new = &res_cache[res_cache_next_free++]; - new->start = start; - new->end = end; - new->name = "System RAM"; - new->flags = IORESOURCE_SYSTEM_RAM; - - *pprev = new; -} - -static int __init -add_reserved_region(resource_size_t start, resource_size_t end, - const char *name) -{ - struct resource *new, *next, **pprev; - - if (end < start) - return -EINVAL; - - if (res_cache_next_free >= ARRAY_SIZE(res_cache)) - return -ENOMEM; - - for (pprev = &reserved, next = reserved; next; - pprev = &next->sibling, next = next->sibling) { - if (end < next->start) - break; - if (start <= next->end) - return -EBUSY; - } - - new = &res_cache[res_cache_next_free++]; - new->start = start; - new->end = end; - new->name = name; - new->sibling = next; - new->flags = IORESOURCE_MEM; - - *pprev = new; - - return 0; -} - -static unsigned long __init -find_free_region(const struct resource *mem, resource_size_t size, - resource_size_t align) -{ - struct resource *res; - unsigned long target; - - target = ALIGN(mem->start, align); - for (res = reserved; res; res = res->sibling) { - if ((target + size) <= res->start) - break; - if (target <= res->end) - target = ALIGN(res->end + 1, align); - } - - if ((target + size) > (mem->end + 1)) - return mem->end + 1; - - return target; -} - -static int __init -alloc_reserved_region(resource_size_t *start, resource_size_t size, - resource_size_t align, const char *name) -{ - struct resource *mem; - resource_size_t target; - int ret; - - for (mem = system_ram; mem; mem = mem->sibling) { - target = find_free_region(mem, size, align); - if (target <= mem->end) { - ret = add_reserved_region(target, target + size - 1, - name); - if (!ret) - *start = target; - return ret; - } - } - - return -ENOMEM; -} - -/* - * Early framebuffer allocation. Works as follows: - * - If fbmem_size is zero, nothing will be allocated or reserved. - * - If fbmem_start is zero when setup_bootmem() is called, - * a block of fbmem_size bytes will be reserved before bootmem - * initialization. It will be aligned to the largest page size - * that fbmem_size is a multiple of. - * - If fbmem_start is nonzero, an area of size fbmem_size will be - * reserved at the physical address fbmem_start if possible. If - * it collides with other reserved memory, a different block of - * same size will be allocated, just as if fbmem_start was zero. - * - * Board-specific code may use these variables to set up platform data - * for the framebuffer driver if fbmem_size is nonzero. - */ -resource_size_t __initdata fbmem_start; -resource_size_t __initdata fbmem_size; - -/* - * "fbmem=xxx[kKmM]" allocates the specified amount of boot memory for - * use as framebuffer. - * - * "fbmem=xxx[kKmM]@yyy[kKmM]" defines a memory region of size xxx and - * starting at yyy to be reserved for use as framebuffer. - * - * The kernel won't verify that the memory region starting at yyy - * actually contains usable RAM. - */ -static int __init early_parse_fbmem(char *p) -{ - int ret; - unsigned long align; - - fbmem_size = memparse(p, &p); - if (*p == '@') { - fbmem_start = memparse(p + 1, &p); - ret = add_reserved_region(fbmem_start, - fbmem_start + fbmem_size - 1, - "Framebuffer"); - if (ret) { - printk(KERN_WARNING - "Failed to reserve framebuffer memory\n"); - fbmem_start = 0; - } - } - - if (!fbmem_start) { - if ((fbmem_size & 0x000fffffUL) == 0) - align = 0x100000; /* 1 MiB */ - else if ((fbmem_size & 0x0000ffffUL) == 0) - align = 0x10000; /* 64 KiB */ - else - align = 0x1000; /* 4 KiB */ - - ret = alloc_reserved_region(&fbmem_start, fbmem_size, - align, "Framebuffer"); - if (ret) { - printk(KERN_WARNING - "Failed to allocate framebuffer memory\n"); - fbmem_size = 0; - } else { - memset(__va(fbmem_start), 0, fbmem_size); - } - } - - return 0; -} -early_param("fbmem", early_parse_fbmem); - -/* - * Pick out the memory size. We look for mem=size@start, - * where start and size are "size[KkMmGg]" - */ -static int __init early_mem(char *p) -{ - resource_size_t size, start; - - start = system_ram->start; - size = memparse(p, &p); - if (*p == '@') - start = memparse(p + 1, &p); - - system_ram->start = start; - system_ram->end = system_ram->start + size - 1; - return 0; -} -early_param("mem", early_mem); - -static int __init parse_tag_core(struct tag *tag) -{ - if (tag->hdr.size > 2) { - if ((tag->u.core.flags & 1) == 0) - root_mountflags &= ~MS_RDONLY; - ROOT_DEV = new_decode_dev(tag->u.core.rootdev); - } - return 0; -} -__tagtable(ATAG_CORE, parse_tag_core); - -static int __init parse_tag_mem(struct tag *tag) -{ - unsigned long start, end; - - /* - * Ignore zero-sized entries. If we're running standalone, the - * SDRAM code may emit such entries if something goes - * wrong... - */ - if (tag->u.mem_range.size == 0) - return 0; - - start = tag->u.mem_range.addr; - end = tag->u.mem_range.addr + tag->u.mem_range.size - 1; - - add_physical_memory(start, end); - return 0; -} -__tagtable(ATAG_MEM, parse_tag_mem); - -static int __init parse_tag_rdimg(struct tag *tag) -{ -#ifdef CONFIG_BLK_DEV_INITRD - struct tag_mem_range *mem = &tag->u.mem_range; - int ret; - - if (initrd_start) { - printk(KERN_WARNING - "Warning: Only the first initrd image will be used\n"); - return 0; - } - - ret = add_reserved_region(mem->addr, mem->addr + mem->size - 1, - "initrd"); - if (ret) { - printk(KERN_WARNING - "Warning: Failed to reserve initrd memory\n"); - return ret; - } - - initrd_start = (unsigned long)__va(mem->addr); - initrd_end = initrd_start + mem->size; -#else - printk(KERN_WARNING "RAM disk image present, but " - "no initrd support in kernel, ignoring\n"); -#endif - - return 0; -} -__tagtable(ATAG_RDIMG, parse_tag_rdimg); - -static int __init parse_tag_rsvd_mem(struct tag *tag) -{ - struct tag_mem_range *mem = &tag->u.mem_range; - - return add_reserved_region(mem->addr, mem->addr + mem->size - 1, - "Reserved"); -} -__tagtable(ATAG_RSVD_MEM, parse_tag_rsvd_mem); - -static int __init parse_tag_cmdline(struct tag *tag) -{ - strlcpy(boot_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE); - return 0; -} -__tagtable(ATAG_CMDLINE, parse_tag_cmdline); - -static int __init parse_tag_clock(struct tag *tag) -{ - /* - * We'll figure out the clocks by peeking at the system - * manager regs directly. - */ - return 0; -} -__tagtable(ATAG_CLOCK, parse_tag_clock); - -/* - * The board_number correspond to the bd->bi_board_number in U-Boot. This - * parameter is only available during initialisation and can be used in some - * kind of board identification. - */ -u32 __initdata board_number; - -static int __init parse_tag_boardinfo(struct tag *tag) -{ - board_number = tag->u.boardinfo.board_number; - - return 0; -} -__tagtable(ATAG_BOARDINFO, parse_tag_boardinfo); - -/* - * Scan the tag table for this tag, and call its parse function. The - * tag table is built by the linker from all the __tagtable - * declarations. - */ -static int __init parse_tag(struct tag *tag) -{ - extern struct tagtable __tagtable_begin, __tagtable_end; - struct tagtable *t; - - for (t = &__tagtable_begin; t < &__tagtable_end; t++) - if (tag->hdr.tag == t->tag) { - t->parse(tag); - break; - } - - return t < &__tagtable_end; -} - -/* - * Parse all tags in the list we got from the boot loader - */ -static void __init parse_tags(struct tag *t) -{ - for (; t->hdr.tag != ATAG_NONE; t = tag_next(t)) - if (!parse_tag(t)) - printk(KERN_WARNING - "Ignoring unrecognised tag 0x%08x\n", - t->hdr.tag); -} - -/* - * Find a free memory region large enough for storing the - * bootmem bitmap. - */ -static unsigned long __init -find_bootmap_pfn(const struct resource *mem) -{ - unsigned long bootmap_pages, bootmap_len; - unsigned long node_pages = PFN_UP(resource_size(mem)); - unsigned long bootmap_start; - - bootmap_pages = bootmem_bootmap_pages(node_pages); - bootmap_len = bootmap_pages << PAGE_SHIFT; - - /* - * Find a large enough region without reserved pages for - * storing the bootmem bitmap. We can take advantage of the - * fact that all lists have been sorted. - * - * We have to check that we don't collide with any reserved - * regions, which includes the kernel image and any RAMDISK - * images. - */ - bootmap_start = find_free_region(mem, bootmap_len, PAGE_SIZE); - - return bootmap_start >> PAGE_SHIFT; -} - -#define MAX_LOWMEM HIGHMEM_START -#define MAX_LOWMEM_PFN PFN_DOWN(MAX_LOWMEM) - -static void __init setup_bootmem(void) -{ - unsigned bootmap_size; - unsigned long first_pfn, bootmap_pfn, pages; - unsigned long max_pfn, max_low_pfn; - unsigned node = 0; - struct resource *res; - - printk(KERN_INFO "Physical memory:\n"); - for (res = system_ram; res; res = res->sibling) - printk(" %08x-%08x\n", res->start, res->end); - printk(KERN_INFO "Reserved memory:\n"); - for (res = reserved; res; res = res->sibling) - printk(" %08x-%08x: %s\n", - res->start, res->end, res->name); - - nodes_clear(node_online_map); - - if (system_ram->sibling) - printk(KERN_WARNING "Only using first memory bank\n"); - - for (res = system_ram; res; res = NULL) { - first_pfn = PFN_UP(res->start); - max_low_pfn = max_pfn = PFN_DOWN(res->end + 1); - bootmap_pfn = find_bootmap_pfn(res); - if (bootmap_pfn > max_pfn) - panic("No space for bootmem bitmap!\n"); - - if (max_low_pfn > MAX_LOWMEM_PFN) { - max_low_pfn = MAX_LOWMEM_PFN; -#ifndef CONFIG_HIGHMEM - /* - * Lowmem is memory that can be addressed - * directly through P1/P2 - */ - printk(KERN_WARNING - "Node %u: Only %ld MiB of memory will be used.\n", - node, MAX_LOWMEM >> 20); - printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); -#else -#error HIGHMEM is not supported by AVR32 yet -#endif - } - - /* Initialize the boot-time allocator with low memory only. */ - bootmap_size = init_bootmem_node(NODE_DATA(node), bootmap_pfn, - first_pfn, max_low_pfn); - - /* - * Register fully available RAM pages with the bootmem - * allocator. - */ - pages = max_low_pfn - first_pfn; - free_bootmem_node (NODE_DATA(node), PFN_PHYS(first_pfn), - PFN_PHYS(pages)); - - /* Reserve space for the bootmem bitmap... */ - reserve_bootmem_node(NODE_DATA(node), - PFN_PHYS(bootmap_pfn), - bootmap_size, - BOOTMEM_DEFAULT); - - /* ...and any other reserved regions. */ - for (res = reserved; res; res = res->sibling) { - if (res->start > PFN_PHYS(max_pfn)) - break; - - /* - * resource_init will complain about partial - * overlaps, so we'll just ignore such - * resources for now. - */ - if (res->start >= PFN_PHYS(first_pfn) - && res->end < PFN_PHYS(max_pfn)) - reserve_bootmem_node(NODE_DATA(node), - res->start, - resource_size(res), - BOOTMEM_DEFAULT); - } - - node_set_online(node); - } -} - -void __init setup_arch (char **cmdline_p) -{ - struct clk *cpu_clk; - - 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)_end; - - /* - * Include .init section to make allocations easier. It will - * be removed before the resource is actually requested. - */ - kernel_code.start = __pa(__init_begin); - kernel_code.end = __pa(init_mm.end_code - 1); - kernel_data.start = __pa(init_mm.end_code); - kernel_data.end = __pa(init_mm.brk - 1); - - parse_tags(bootloader_tags); - - setup_processor(); - setup_platform(); - setup_board(); - - cpu_clk = clk_get(NULL, "cpu"); - if (IS_ERR(cpu_clk)) { - printk(KERN_WARNING "Warning: Unable to get CPU clock\n"); - } else { - unsigned long cpu_hz = clk_get_rate(cpu_clk); - - /* - * Well, duh, but it's probably a good idea to - * increment the use count. - */ - clk_enable(cpu_clk); - - boot_cpu_data.clk = cpu_clk; - boot_cpu_data.loops_per_jiffy = cpu_hz * 4; - printk("CPU: Running at %lu.%03lu MHz\n", - ((cpu_hz + 500) / 1000) / 1000, - ((cpu_hz + 500) / 1000) % 1000); - } - - strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); - *cmdline_p = command_line; - parse_early_param(); - - setup_bootmem(); - -#ifdef CONFIG_VT - conswitchp = &dummy_con; -#endif - - paging_init(); - resource_init(); -} |