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// 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,
};
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