mirror of https://gitee.com/openkylin/linux.git
80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
|
|
|
|
#include <linux/of.h>
|
|
#include <linux/init.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/memblock.h>
|
|
|
|
#include <abi/reg_ops.h>
|
|
|
|
static void percpu_print(void *arg)
|
|
{
|
|
struct seq_file *m = (struct seq_file *)arg;
|
|
unsigned int cur, next, i;
|
|
|
|
seq_printf(m, "processor : %d\n", smp_processor_id());
|
|
seq_printf(m, "C-SKY CPU model : %s\n", CSKYCPU_DEF_NAME);
|
|
|
|
/* read processor id, max is 100 */
|
|
cur = mfcr("cr13");
|
|
for (i = 0; i < 100; i++) {
|
|
seq_printf(m, "product info[%d] : 0x%08x\n", i, cur);
|
|
|
|
next = mfcr("cr13");
|
|
|
|
/* some CPU only has one id reg */
|
|
if (cur == next)
|
|
break;
|
|
|
|
cur = next;
|
|
|
|
/* cpid index is 31-28, reset */
|
|
if (!(next >> 28)) {
|
|
while ((mfcr("cr13") >> 28) != i);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* CPU feature regs, setup by bootloader or gdbinit */
|
|
seq_printf(m, "hint (CPU funcs): 0x%08x\n", mfcr_hint());
|
|
seq_printf(m, "ccr (L1C & MMU): 0x%08x\n", mfcr("cr18"));
|
|
seq_printf(m, "ccr2 (L2C) : 0x%08x\n", mfcr_ccr2());
|
|
seq_printf(m, "\n");
|
|
}
|
|
|
|
static int c_show(struct seq_file *m, void *v)
|
|
{
|
|
int cpu;
|
|
|
|
for_each_online_cpu(cpu)
|
|
smp_call_function_single(cpu, percpu_print, m, true);
|
|
|
|
#ifdef CSKY_ARCH_VERSION
|
|
seq_printf(m, "arch-version : %s\n", CSKY_ARCH_VERSION);
|
|
seq_printf(m, "\n");
|
|
#endif
|
|
|
|
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,
|
|
};
|