Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138// SPDX-License-Identifier: GPL-2.0-only/* * Arch related setup for Hexagon * * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. */
#include <linux/init.h>#include <linux/delay.h>#include <linux/memblock.h>#include <linux/mmzone.h>#include <linux/mm.h>#include <linux/seq_file.h>#include <linux/console.h>#include <linux/of_fdt.h>#include <asm/io.h>#include <asm/sections.h>#include <asm/setup.h>#include <asm/processor.h>#include <asm/hexagon_vm.h>#include <asm/vm_mmu.h>#include <asm/time.h>
char cmd_line[COMMAND_LINE_SIZE];static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
int on_simulator;
void calibrate_delay(void){ loops_per_jiffy = thread_freq_mhz * 1000000 / HZ;}
/* * setup_arch - high level architectural setup routine * @cmdline_p: pointer to pointer to command-line arguments */
void __init setup_arch(char **cmdline_p){ char *p = &external_cmdline_buffer;
/* * These will eventually be pulled in via either some hypervisor * or devicetree description. Hardwiring for now. */ pcycle_freq_mhz = 600; thread_freq_mhz = 100; sleep_clk_freq = 32000;
/* * Set up event bindings to handle exceptions and interrupts. */ __vmsetvec(_K_VM_event_vector);
printk(KERN_INFO "PHYS_OFFSET=0x%08lx\n", PHYS_OFFSET);
/* * Simulator has a few differences from the hardware. * For now, check uninitialized-but-mapped memory * prior to invoking setup_arch_memory(). */ if (*(int *)((unsigned long)_end + 8) == 0x1f1f1f1f) on_simulator = 1; else on_simulator = 0;
if (p[0] != '\0') strscpy(boot_command_line, p, COMMAND_LINE_SIZE); else strscpy(boot_command_line, default_command_line, COMMAND_LINE_SIZE);
/* * boot_command_line and the value set up by setup_arch * are both picked up by the init code. If no reason to * make them different, pass the same pointer back. */ strscpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE); *cmdline_p = cmd_line;
parse_early_param();
setup_arch_memory();
#ifdef CONFIG_SMP smp_start_cpus();#endif}
/* * Functions for dumping CPU info via /proc * Probably should move to kernel/proc.c or something. */static void *c_start(struct seq_file *m, loff_t *pos){ return *pos < nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : 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){}
/* * Eventually this will dump information about * CPU properties like ISA level, TLB size, etc. */static int show_cpuinfo(struct seq_file *m, void *v){ int cpu = (unsigned long) v - 1;
#ifdef CONFIG_SMP if (!cpu_online(cpu)) return 0;#endif
seq_printf(m, "processor\t: %d\n", cpu); seq_printf(m, "model name\t: Hexagon Virtual Machine\n"); seq_printf(m, "BogoMips\t: %lu.%02lu\n", (loops_per_jiffy * HZ) / 500000, ((loops_per_jiffy * HZ) / 5000) % 100); seq_printf(m, "\n"); return 0;}
const struct seq_operations cpuinfo_op = { .start = &c_start, .next = &c_next, .stop = &c_stop, .show = &show_cpuinfo,};