diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/openrisc/kernel/setup.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/openrisc/kernel/setup.c | 380 |
1 files changed, 0 insertions, 380 deletions
diff --git a/ANDROID_3.4.5/arch/openrisc/kernel/setup.c b/ANDROID_3.4.5/arch/openrisc/kernel/setup.c deleted file mode 100644 index f4d5bedc..00000000 --- a/ANDROID_3.4.5/arch/openrisc/kernel/setup.c +++ /dev/null @@ -1,380 +0,0 @@ -/* - * OpenRISC setup.c - * - * Linux architectural port borrowing liberally from similar works of - * others. All original copyrights apply as per the original source - * declaration. - * - * Modifications for the OpenRISC architecture: - * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> - * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - * This file handles the architecture-dependent parts of initialization - */ - -#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/tty.h> -#include <linux/ioport.h> -#include <linux/delay.h> -#include <linux/console.h> -#include <linux/init.h> -#include <linux/bootmem.h> -#include <linux/seq_file.h> -#include <linux/serial.h> -#include <linux/initrd.h> -#include <linux/of_fdt.h> -#include <linux/of.h> -#include <linux/memblock.h> -#include <linux/device.h> -#include <linux/of_platform.h> - -#include <asm/segment.h> -#include <asm/pgtable.h> -#include <asm/types.h> -#include <asm/setup.h> -#include <asm/io.h> -#include <asm/cpuinfo.h> -#include <asm/delay.h> - -#include "vmlinux.h" - -char __initdata cmd_line[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; - -static unsigned long __init setup_memory(void) -{ - unsigned long bootmap_size; - unsigned long ram_start_pfn; - unsigned long free_ram_start_pfn; - unsigned long ram_end_pfn; - phys_addr_t memory_start, memory_end; - struct memblock_region *region; - - memory_end = memory_start = 0; - - /* Find main memory where is the kernel */ - for_each_memblock(memory, region) { - memory_start = region->base; - memory_end = region->base + region->size; - printk(KERN_INFO "%s: Memory: 0x%x-0x%x\n", __func__, - memory_start, memory_end); - } - - if (!memory_end) { - panic("No memory!"); - } - - ram_start_pfn = PFN_UP(memory_start); - /* free_ram_start_pfn is first page after kernel */ - free_ram_start_pfn = PFN_UP(__pa(&_end)); - ram_end_pfn = PFN_DOWN(memblock_end_of_DRAM()); - - max_pfn = ram_end_pfn; - - /* - * initialize the boot-time allocator (with low memory only). - * - * This makes the memory from the end of the kernel to the end of - * RAM usable. - * init_bootmem sets the global values min_low_pfn, max_low_pfn. - */ - bootmap_size = init_bootmem(free_ram_start_pfn, - ram_end_pfn - ram_start_pfn); - free_bootmem(PFN_PHYS(free_ram_start_pfn), - (ram_end_pfn - free_ram_start_pfn) << PAGE_SHIFT); - reserve_bootmem(PFN_PHYS(free_ram_start_pfn), bootmap_size, - BOOTMEM_DEFAULT); - - for_each_memblock(reserved, region) { - printk(KERN_INFO "Reserved - 0x%08x-0x%08x\n", - (u32) region->base, (u32) region->size); - reserve_bootmem(region->base, region->size, BOOTMEM_DEFAULT); - } - - return ram_end_pfn; -} - -struct cpuinfo cpuinfo; - -static void print_cpuinfo(void) -{ - unsigned long upr = mfspr(SPR_UPR); - unsigned long vr = mfspr(SPR_VR); - unsigned int version; - unsigned int revision; - - version = (vr & SPR_VR_VER) >> 24; - revision = (vr & SPR_VR_REV); - - printk(KERN_INFO "CPU: OpenRISC-%x (revision %d) @%d MHz\n", - version, revision, cpuinfo.clock_frequency / 1000000); - - if (!(upr & SPR_UPR_UP)) { - printk(KERN_INFO - "-- no UPR register... unable to detect configuration\n"); - return; - } - - if (upr & SPR_UPR_DCP) - printk(KERN_INFO - "-- dcache: %4d bytes total, %2d bytes/line, %d way(s)\n", - cpuinfo.dcache_size, cpuinfo.dcache_block_size, 1); - else - printk(KERN_INFO "-- dcache disabled\n"); - if (upr & SPR_UPR_ICP) - printk(KERN_INFO - "-- icache: %4d bytes total, %2d bytes/line, %d way(s)\n", - cpuinfo.icache_size, cpuinfo.icache_block_size, 1); - else - printk(KERN_INFO "-- icache disabled\n"); - - if (upr & SPR_UPR_DMP) - printk(KERN_INFO "-- dmmu: %4d entries, %lu way(s)\n", - 1 << ((mfspr(SPR_DMMUCFGR) & SPR_DMMUCFGR_NTS) >> 2), - 1 + (mfspr(SPR_DMMUCFGR) & SPR_DMMUCFGR_NTW)); - if (upr & SPR_UPR_IMP) - printk(KERN_INFO "-- immu: %4d entries, %lu way(s)\n", - 1 << ((mfspr(SPR_IMMUCFGR) & SPR_IMMUCFGR_NTS) >> 2), - 1 + (mfspr(SPR_IMMUCFGR) & SPR_IMMUCFGR_NTW)); - - printk(KERN_INFO "-- additional features:\n"); - if (upr & SPR_UPR_DUP) - printk(KERN_INFO "-- debug unit\n"); - if (upr & SPR_UPR_PCUP) - printk(KERN_INFO "-- performance counters\n"); - if (upr & SPR_UPR_PMP) - printk(KERN_INFO "-- power management\n"); - if (upr & SPR_UPR_PICP) - printk(KERN_INFO "-- PIC\n"); - if (upr & SPR_UPR_TTP) - printk(KERN_INFO "-- timer\n"); - if (upr & SPR_UPR_CUP) - printk(KERN_INFO "-- custom unit(s)\n"); -} - -void __init setup_cpuinfo(void) -{ - struct device_node *cpu; - unsigned long iccfgr, dccfgr; - unsigned long cache_set_size, cache_ways; - - cpu = of_find_compatible_node(NULL, NULL, "opencores,or1200-rtlsvn481"); - if (!cpu) - panic("No compatible CPU found in device tree...\n"); - - iccfgr = mfspr(SPR_ICCFGR); - cache_ways = 1 << (iccfgr & SPR_ICCFGR_NCW); - cache_set_size = 1 << ((iccfgr & SPR_ICCFGR_NCS) >> 3); - cpuinfo.icache_block_size = 16 << ((iccfgr & SPR_ICCFGR_CBS) >> 7); - cpuinfo.icache_size = - cache_set_size * cache_ways * cpuinfo.icache_block_size; - - dccfgr = mfspr(SPR_DCCFGR); - cache_ways = 1 << (dccfgr & SPR_DCCFGR_NCW); - cache_set_size = 1 << ((dccfgr & SPR_DCCFGR_NCS) >> 3); - cpuinfo.dcache_block_size = 16 << ((dccfgr & SPR_DCCFGR_CBS) >> 7); - cpuinfo.dcache_size = - cache_set_size * cache_ways * cpuinfo.dcache_block_size; - - if (of_property_read_u32(cpu, "clock-frequency", - &cpuinfo.clock_frequency)) { - printk(KERN_WARNING - "Device tree missing CPU 'clock-frequency' parameter." - "Assuming frequency 25MHZ" - "This is probably not what you want."); - } - - of_node_put(cpu); - - print_cpuinfo(); -} - -/** - * or32_early_setup - * - * Handles the pointer to the device tree that this kernel is to use - * for establishing the available platform devices. - * - * Falls back on built-in device tree in case null pointer is passed. - */ - -void __init or32_early_setup(unsigned int fdt) -{ - if (fdt) { - early_init_devtree((void*) fdt); - printk(KERN_INFO "FDT at 0x%08x\n", fdt); - } else { - early_init_devtree(__dtb_start); - printk(KERN_INFO "Compiled-in FDT at %p\n", __dtb_start); - } -} - -static int __init openrisc_device_probe(void) -{ - of_platform_populate(NULL, NULL, NULL, NULL); - - return 0; -} - -device_initcall(openrisc_device_probe); - -static inline unsigned long extract_value_bits(unsigned long reg, - short bit_nr, short width) -{ - return (reg >> bit_nr) & (0 << width); -} - -static inline unsigned long extract_value(unsigned long reg, unsigned long mask) -{ - while (!(mask & 0x1)) { - reg = reg >> 1; - mask = mask >> 1; - } - return mask & reg; -} - -void __init detect_unit_config(unsigned long upr, unsigned long mask, - char *text, void (*func) (void)) -{ - if (text != NULL) - printk("%s", text); - - if (upr & mask) { - if (func != NULL) - func(); - else - printk("present\n"); - } else - printk("not present\n"); -} - -/* - * calibrate_delay - * - * Lightweight calibrate_delay implementation that calculates loops_per_jiffy - * from the clock frequency passed in via the device tree - * - */ - -void __cpuinit calibrate_delay(void) -{ - const int *val; - struct device_node *cpu = NULL; - cpu = of_find_compatible_node(NULL, NULL, "opencores,or1200-rtlsvn481"); - val = of_get_property(cpu, "clock-frequency", NULL); - if (!val) - panic("no cpu 'clock-frequency' parameter in device tree"); - loops_per_jiffy = *val / HZ; - pr_cont("%lu.%02lu BogoMIPS (lpj=%lu)\n", - loops_per_jiffy / (500000 / HZ), - (loops_per_jiffy / (5000 / HZ)) % 100, loops_per_jiffy); -} - -void __init setup_arch(char **cmdline_p) -{ - unsigned long max_low_pfn; - - unflatten_device_tree(); - - setup_cpuinfo(); - - /* process 1's initial memory region is the kernel code/data */ - 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; - -#ifdef CONFIG_BLK_DEV_INITRD - initrd_start = (unsigned long)&__initrd_start; - initrd_end = (unsigned long)&__initrd_end; - if (initrd_start == initrd_end) { - initrd_start = 0; - initrd_end = 0; - } - initrd_below_start_ok = 1; -#endif - - /* setup bootmem allocator */ - max_low_pfn = setup_memory(); - - /* paging_init() sets up the MMU and marks all pages as reserved */ - paging_init(); - -#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE) - if (!conswitchp) - conswitchp = &dummy_con; -#endif - - *cmdline_p = cmd_line; - - printk(KERN_INFO "OpenRISC Linux -- http://openrisc.net\n"); -} - -static int show_cpuinfo(struct seq_file *m, void *v) -{ - unsigned long vr; - int version, revision; - - vr = mfspr(SPR_VR); - version = (vr & SPR_VR_VER) >> 24; - revision = vr & SPR_VR_REV; - - return seq_printf(m, - "cpu\t\t: OpenRISC-%x\n" - "revision\t: %d\n" - "frequency\t: %ld\n" - "dcache size\t: %d bytes\n" - "dcache block size\t: %d bytes\n" - "icache size\t: %d bytes\n" - "icache block size\t: %d bytes\n" - "immu\t\t: %d entries, %lu ways\n" - "dmmu\t\t: %d entries, %lu ways\n" - "bogomips\t: %lu.%02lu\n", - version, - revision, - loops_per_jiffy * HZ, - cpuinfo.dcache_size, - cpuinfo.dcache_block_size, - cpuinfo.icache_size, - cpuinfo.icache_block_size, - 1 << ((mfspr(SPR_DMMUCFGR) & SPR_DMMUCFGR_NTS) >> 2), - 1 + (mfspr(SPR_DMMUCFGR) & SPR_DMMUCFGR_NTW), - 1 << ((mfspr(SPR_IMMUCFGR) & SPR_IMMUCFGR_NTS) >> 2), - 1 + (mfspr(SPR_IMMUCFGR) & SPR_IMMUCFGR_NTW), - (loops_per_jiffy * HZ) / 500000, - ((loops_per_jiffy * HZ) / 5000) % 100); -} - -static void *c_start(struct seq_file *m, loff_t * pos) -{ - /* We only have one CPU... */ - return *pos < 1 ? (void *)1 : NULL; -} - -static void *c_next(struct seq_file *m, void *v, loff_t * pos) -{ - ++*pos; - return NULL; -} - -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, -}; |