diff options
Diffstat (limited to 'arch/unicore32/kernel/setup.c')
| -rw-r--r-- | arch/unicore32/kernel/setup.c | 352 |
1 files changed, 0 insertions, 352 deletions
diff --git a/arch/unicore32/kernel/setup.c b/arch/unicore32/kernel/setup.c deleted file mode 100644 index 0c4242a5ee1d..000000000000 --- a/arch/unicore32/kernel/setup.c +++ /dev/null @@ -1,352 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/setup.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/stddef.h> -#include <linux/ioport.h> -#include <linux/delay.h> -#include <linux/utsname.h> -#include <linux/initrd.h> -#include <linux/console.h> -#include <linux/memblock.h> -#include <linux/seq_file.h> -#include <linux/screen_info.h> -#include <linux/init.h> -#include <linux/root_dev.h> -#include <linux/cpu.h> -#include <linux/interrupt.h> -#include <linux/smp.h> -#include <linux/fs.h> -#include <linux/proc_fs.h> -#include <linux/elf.h> -#include <linux/io.h> - -#include <asm/cputype.h> -#include <asm/sections.h> -#include <asm/setup.h> -#include <asm/cacheflush.h> -#include <asm/tlbflush.h> -#include <asm/traps.h> -#include <asm/memblock.h> - -#include "setup.h" - -#ifndef MEM_SIZE -#define MEM_SIZE (16*1024*1024) -#endif - -struct stack { - u32 irq[3]; - u32 abt[3]; - u32 und[3]; -} ____cacheline_aligned; - -static struct stack stacks[NR_CPUS]; - -#ifdef CONFIG_VGA_CONSOLE -struct screen_info screen_info; -#endif - -char elf_platform[ELF_PLATFORM_SIZE]; -EXPORT_SYMBOL(elf_platform); - -static char __initdata cmd_line[COMMAND_LINE_SIZE]; - -static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE; - -/* - * Standard memory resources - */ -static struct resource mem_res[] = { - { - .name = "Kernel code", - .start = 0, - .end = 0, - .flags = IORESOURCE_SYSTEM_RAM - }, - { - .name = "Kernel data", - .start = 0, - .end = 0, - .flags = IORESOURCE_SYSTEM_RAM - } -}; - -#define kernel_code mem_res[0] -#define kernel_data mem_res[1] - -/* - * These functions re-use the assembly code in head.S, which - * already provide the required functionality. - */ -static void __init setup_processor(void) -{ - printk(KERN_DEFAULT "CPU: UniCore-II [%08x] revision %d, cr=%08lx\n", - uc32_cpuid, (int)(uc32_cpuid >> 16) & 15, cr_alignment); - - sprintf(init_utsname()->machine, "puv3"); - sprintf(elf_platform, "ucv2"); -} - -/* - * cpu_init - initialise one CPU. - * - * cpu_init sets up the per-CPU stacks. - */ -void cpu_init(void) -{ - unsigned int cpu = smp_processor_id(); - struct stack *stk = &stacks[cpu]; - - /* - * setup stacks for re-entrant exception handlers - */ - __asm__ ( - "mov.a asr, %1\n\t" - "add sp, %0, %2\n\t" - "mov.a asr, %3\n\t" - "add sp, %0, %4\n\t" - "mov.a asr, %5\n\t" - "add sp, %0, %6\n\t" - "mov.a asr, %7" - : - : "r" (stk), - "r" (PSR_R_BIT | PSR_I_BIT | INTR_MODE), - "I" (offsetof(struct stack, irq[0])), - "r" (PSR_R_BIT | PSR_I_BIT | ABRT_MODE), - "I" (offsetof(struct stack, abt[0])), - "r" (PSR_R_BIT | PSR_I_BIT | EXTN_MODE), - "I" (offsetof(struct stack, und[0])), - "r" (PSR_R_BIT | PSR_I_BIT | PRIV_MODE) - : "r30", "cc"); -} - -static int __init uc32_add_memory(unsigned long start, unsigned long size) -{ - struct membank *bank = &meminfo.bank[meminfo.nr_banks]; - - if (meminfo.nr_banks >= NR_BANKS) { - printk(KERN_CRIT "NR_BANKS too low, " - "ignoring memory at %#lx\n", start); - return -EINVAL; - } - - /* - * Ensure that start/size are aligned to a page boundary. - * Size is appropriately rounded down, start is rounded up. - */ - size -= start & ~PAGE_MASK; - - bank->start = PAGE_ALIGN(start); - bank->size = size & PAGE_MASK; - - /* - * Check whether this memory region has non-zero size or - * invalid node number. - */ - if (bank->size == 0) - return -EINVAL; - - meminfo.nr_banks++; - return 0; -} - -/* - * Pick out the memory size. We look for mem=size@start, - * where start and size are "size[KkMm]" - */ -static int __init early_mem(char *p) -{ - static int usermem __initdata = 1; - unsigned long size, start; - char *endp; - - /* - * If the user specifies memory size, we - * blow away any automatically generated - * size. - */ - if (usermem) { - usermem = 0; - meminfo.nr_banks = 0; - } - - start = PHYS_OFFSET; - size = memparse(p, &endp); - if (*endp == '@') - start = memparse(endp + 1, NULL); - - uc32_add_memory(start, size); - - return 0; -} -early_param("mem", early_mem); - -static void __init -request_standard_resources(struct meminfo *mi) -{ - struct resource *res; - int i; - - kernel_code.start = virt_to_phys(_stext); - kernel_code.end = virt_to_phys(_etext - 1); - kernel_data.start = virt_to_phys(_sdata); - kernel_data.end = virt_to_phys(_end - 1); - - for (i = 0; i < mi->nr_banks; i++) { - if (mi->bank[i].size == 0) - continue; - - res = memblock_alloc_low(sizeof(*res), SMP_CACHE_BYTES); - if (!res) - panic("%s: Failed to allocate %zu bytes align=%x\n", - __func__, sizeof(*res), SMP_CACHE_BYTES); - - res->name = "System RAM"; - res->start = mi->bank[i].start; - res->end = mi->bank[i].start + mi->bank[i].size - 1; - res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; - - request_resource(&iomem_resource, res); - - if (kernel_code.start >= res->start && - kernel_code.end <= res->end) - request_resource(res, &kernel_code); - if (kernel_data.start >= res->start && - kernel_data.end <= res->end) - request_resource(res, &kernel_data); - } -} - -static void (*init_machine)(void) __initdata; - -static int __init customize_machine(void) -{ - /* customizes platform devices, or adds new ones */ - if (init_machine) - init_machine(); - return 0; -} -arch_initcall(customize_machine); - -void __init setup_arch(char **cmdline_p) -{ - char *from = default_command_line; - - setup_processor(); - - 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; - - /* parse_early_param needs a boot_command_line */ - strlcpy(boot_command_line, from, COMMAND_LINE_SIZE); - - /* populate cmd_line too for later use, preserving boot_command_line */ - strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE); - *cmdline_p = cmd_line; - - parse_early_param(); - - uc32_memblock_init(&meminfo); - - paging_init(); - request_standard_resources(&meminfo); - - cpu_init(); - - /* - * Set up various architecture-specific pointers - */ - init_machine = puv3_core_init; - -#ifdef CONFIG_VT -#if defined(CONFIG_VGA_CONSOLE) - conswitchp = &vga_con; -#endif -#endif - early_trap_init(); -} - -static struct cpu cpuinfo_unicore; - -static int __init topology_init(void) -{ - int i; - - for_each_possible_cpu(i) - register_cpu(&cpuinfo_unicore, i); - - return 0; -} -subsys_initcall(topology_init); - -#ifdef CONFIG_HAVE_PROC_CPU -static int __init proc_cpu_init(void) -{ - struct proc_dir_entry *res; - - res = proc_mkdir("cpu", NULL); - if (!res) - return -ENOMEM; - return 0; -} -fs_initcall(proc_cpu_init); -#endif - -static int c_show(struct seq_file *m, void *v) -{ - seq_printf(m, "Processor\t: UniCore-II rev %d (%s)\n", - (int)(uc32_cpuid >> 16) & 15, elf_platform); - - seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", - loops_per_jiffy / (500000/HZ), - (loops_per_jiffy / (5000/HZ)) % 100); - - /* dump out the processor features */ - seq_puts(m, "Features\t: CMOV UC-F64"); - - seq_printf(m, "\nCPU implementer\t: 0x%02x\n", uc32_cpuid >> 24); - seq_printf(m, "CPU architecture: 2\n"); - seq_printf(m, "CPU revision\t: %d\n", (uc32_cpuid >> 16) & 15); - - seq_printf(m, "Cache type\t: write-back\n" - "Cache clean\t: cp0 c5 ops\n" - "Cache lockdown\t: not support\n" - "Cache format\t: Harvard\n"); - - seq_puts(m, "\n"); - - seq_printf(m, "Hardware\t: PKUnity v3\n"); - - return 0; -} - -static void *c_start(struct seq_file *m, loff_t *pos) -{ - 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 = c_show -}; |