^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Arch related setup for Hexagon
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/mmzone.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/of_fdt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/processor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/hexagon_vm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/vm_mmu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) char cmd_line[COMMAND_LINE_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) int on_simulator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) void calibrate_delay(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) loops_per_jiffy = thread_freq_mhz * 1000000 / HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * setup_arch - high level architectural setup routine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * @cmdline_p: pointer to pointer to command-line arguments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) void __init setup_arch(char **cmdline_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) char *p = &external_cmdline_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * These will eventually be pulled in via either some hypervisor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * or devicetree description. Hardwiring for now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) pcycle_freq_mhz = 600;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) thread_freq_mhz = 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) sleep_clk_freq = 32000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * Set up event bindings to handle exceptions and interrupts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) __vmsetvec(_K_VM_event_vector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) printk(KERN_INFO "PHYS_OFFSET=0x%08lx\n", PHYS_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * Simulator has a few differences from the hardware.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * For now, check uninitialized-but-mapped memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * prior to invoking setup_arch_memory().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (*(int *)((unsigned long)_end + 8) == 0x1f1f1f1f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) on_simulator = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) on_simulator = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (p[0] != '\0')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) strlcpy(boot_command_line, p, COMMAND_LINE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) strlcpy(boot_command_line, default_command_line,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) COMMAND_LINE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * boot_command_line and the value set up by setup_arch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * are both picked up by the init code. If no reason to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * make them different, pass the same pointer back.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) *cmdline_p = cmd_line;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) parse_early_param();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) setup_arch_memory();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) smp_start_cpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * Functions for dumping CPU info via /proc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * Probably should move to kernel/proc.c or something.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static void *c_start(struct seq_file *m, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return *pos < nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static void *c_next(struct seq_file *m, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) ++*pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return c_start(m, pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static void c_stop(struct seq_file *m, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * Eventually this will dump information about
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * CPU properties like ISA level, TLB size, etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static int show_cpuinfo(struct seq_file *m, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int cpu = (unsigned long) v - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (!cpu_online(cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) seq_printf(m, "processor\t: %d\n", cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) seq_printf(m, "model name\t: Hexagon Virtual Machine\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) seq_printf(m, "BogoMips\t: %lu.%02lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) (loops_per_jiffy * HZ) / 500000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) ((loops_per_jiffy * HZ) / 5000) % 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) seq_printf(m, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) const struct seq_operations cpuinfo_op = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .start = &c_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .next = &c_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .stop = &c_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .show = &show_cpuinfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags