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// 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,
};
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