diff options
Diffstat (limited to 'arch/mn10300/kernel/setup.c')
| -rw-r--r-- | arch/mn10300/kernel/setup.c | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/arch/mn10300/kernel/setup.c b/arch/mn10300/kernel/setup.c new file mode 100644 index 000000000000..6b7ce2636851 --- /dev/null +++ b/arch/mn10300/kernel/setup.c @@ -0,0 +1,298 @@ +/* MN10300 Arch-specific initialisation + * + * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/stddef.h> +#include <linux/unistd.h> +#include <linux/ptrace.h> +#include <linux/slab.h> +#include <linux/user.h> +#include <linux/a.out.h> +#include <linux/tty.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/bootmem.h> +#include <linux/seq_file.h> +#include <asm/processor.h> +#include <linux/console.h> +#include <asm/uaccess.h> +#include <asm/system.h> +#include <asm/setup.h> +#include <asm/io.h> +#include <asm/smp.h> +#include <asm/proc/proc.h> +#include <asm/busctl-regs.h> +#include <asm/fpu.h> +#include <asm/sections.h> + +struct mn10300_cpuinfo boot_cpu_data; + +/* For PCI or other memory-mapped resources */ +unsigned long pci_mem_start = 0x18000000; + +char redboot_command_line[COMMAND_LINE_SIZE] = + "console=ttyS0,115200 root=/dev/mtdblock3 rw"; + +char __initdata redboot_platform_name[COMMAND_LINE_SIZE]; + +static struct resource code_resource = { + .start = 0x100000, + .end = 0, + .name = "Kernel code", +}; + +static struct resource data_resource = { + .start = 0, + .end = 0, + .name = "Kernel data", +}; + +static unsigned long __initdata phys_memory_base; +static unsigned long __initdata phys_memory_end; +static unsigned long __initdata memory_end; +unsigned long memory_size; + +struct thread_info *__current_ti = &init_thread_union.thread_info; +struct task_struct *__current = &init_task; + +#define mn10300_known_cpus 3 +static const char *const mn10300_cputypes[] = { + "am33v1", + "am33v2", + "am34v1", + "unknown" +}; + +/* + * + */ +static void __init parse_mem_cmdline(char **cmdline_p) +{ + char *from, *to, c; + + /* save unparsed command line copy for /proc/cmdline */ + strcpy(boot_command_line, redboot_command_line); + + /* see if there's an explicit memory size option */ + from = redboot_command_line; + to = redboot_command_line; + c = ' '; + + for (;;) { + if (c == ' ' && !memcmp(from, "mem=", 4)) { + if (to != redboot_command_line) + to--; + memory_size = memparse(from + 4, &from); + } + + c = *(from++); + if (!c) + break; + + *(to++) = c; + } + + *to = '\0'; + *cmdline_p = redboot_command_line; + + if (memory_size == 0) + panic("Memory size not known\n"); + + memory_end = (unsigned long) CONFIG_KERNEL_RAM_BASE_ADDRESS + + memory_size; + if (memory_end > phys_memory_end) + memory_end = phys_memory_end; +} + +/* + * architecture specific setup + */ +void __init setup_arch(char **cmdline_p) +{ + unsigned long bootmap_size; + unsigned long kstart_pfn, start_pfn, free_pfn, end_pfn; + + cpu_init(); + unit_setup(); + parse_mem_cmdline(cmdline_p); + + 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_bus(&_text); + code_resource.end = virt_to_bus(&_etext)-1; + data_resource.start = virt_to_bus(&_etext); + data_resource.end = virt_to_bus(&_edata)-1; + +#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) +#define PFN_DOWN(x) ((x) >> PAGE_SHIFT) +#define PFN_PHYS(x) ((x) << PAGE_SHIFT) + + start_pfn = (CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT); + kstart_pfn = PFN_UP(__pa(&_text)); + free_pfn = PFN_UP(__pa(&_end)); + end_pfn = PFN_DOWN(__pa(memory_end)); + + bootmap_size = init_bootmem_node(&contig_page_data, + free_pfn, + start_pfn, + end_pfn); + + if (kstart_pfn > start_pfn) + free_bootmem(PFN_PHYS(start_pfn), + PFN_PHYS(kstart_pfn - start_pfn)); + + free_bootmem(PFN_PHYS(free_pfn), + PFN_PHYS(end_pfn - free_pfn)); + + /* If interrupt vector table is in main ram, then we need to + reserve the page it is occupying. */ + if (CONFIG_INTERRUPT_VECTOR_BASE >= CONFIG_KERNEL_RAM_BASE_ADDRESS && + CONFIG_INTERRUPT_VECTOR_BASE < memory_end) + reserve_bootmem(CONFIG_INTERRUPT_VECTOR_BASE, 1, + BOOTMEM_DEFAULT); + + reserve_bootmem(PAGE_ALIGN(PFN_PHYS(free_pfn)), bootmap_size, + BOOTMEM_DEFAULT); + +#ifdef CONFIG_VT +#if defined(CONFIG_VGA_CONSOLE) + conswitchp = &vga_con; +#elif defined(CONFIG_DUMMY_CONSOLE) + conswitchp = &dummy_con; +#endif +#endif + + paging_init(); +} + +/* + * perform CPU initialisation + */ +void __init cpu_init(void) +{ + unsigned long cpurev = CPUREV, type; + unsigned long base, size; + + type = (CPUREV & CPUREV_TYPE) >> CPUREV_TYPE_S; + if (type > mn10300_known_cpus) + type = mn10300_known_cpus; + + printk(KERN_INFO "Matsushita %s, rev %ld\n", + mn10300_cputypes[type], + (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S); + + /* determine the memory size and base from the memory controller regs */ + memory_size = 0; + + base = SDBASE(0); + if (base & SDBASE_CE) { + size = (base & SDBASE_CBAM) << SDBASE_CBAM_SHIFT; + size = ~size + 1; + base &= SDBASE_CBA; + + printk(KERN_INFO "SDRAM[0]: %luMb @%08lx\n", size >> 20, base); + memory_size += size; + phys_memory_base = base; + } + + base = SDBASE(1); + if (base & SDBASE_CE) { + size = (base & SDBASE_CBAM) << SDBASE_CBAM_SHIFT; + size = ~size + 1; + base &= SDBASE_CBA; + + printk(KERN_INFO "SDRAM[1]: %luMb @%08lx\n", size >> 20, base); + memory_size += size; + if (phys_memory_base == 0) + phys_memory_base = base; + } + + phys_memory_end = phys_memory_base + memory_size; + +#ifdef CONFIG_FPU + fpu_init_state(); +#endif +} + +/* + * Get CPU information for use by the procfs. + */ +static int show_cpuinfo(struct seq_file *m, void *v) +{ + unsigned long cpurev = CPUREV, type, icachesz, dcachesz; + + type = (CPUREV & CPUREV_TYPE) >> CPUREV_TYPE_S; + if (type > mn10300_known_cpus) + type = mn10300_known_cpus; + + icachesz = + ((cpurev & CPUREV_ICWAY ) >> CPUREV_ICWAY_S) * + ((cpurev & CPUREV_ICSIZE) >> CPUREV_ICSIZE_S) * + 1024; + + dcachesz = + ((cpurev & CPUREV_DCWAY ) >> CPUREV_DCWAY_S) * + ((cpurev & CPUREV_DCSIZE) >> CPUREV_DCSIZE_S) * + 1024; + + seq_printf(m, + "processor : 0\n" + "vendor_id : Matsushita\n" + "cpu core : %s\n" + "cpu rev : %lu\n" + "model name : " PROCESSOR_MODEL_NAME "\n" + "icache size: %lu\n" + "dcache size: %lu\n", + mn10300_cputypes[type], + (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S, + icachesz, + dcachesz + ); + + seq_printf(m, + "ioclk speed: %lu.%02luMHz\n" + "bogomips : %lu.%02lu\n\n", + MN10300_IOCLK / 1000000, + (MN10300_IOCLK / 10000) % 100, + loops_per_jiffy / (500000 / HZ), + (loops_per_jiffy / (5000 / HZ)) % 100 + ); + + 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, +}; |