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081860b970
This patch adds exception handling code, cpuinfo and mm-fault code. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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#include <linux/of.h>
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#include <linux/init.h>
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#include <linux/seq_file.h>
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#include <linux/memblock.h>
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#include <abi/reg_ops.h>
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static void percpu_print(void *arg)
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{
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struct seq_file *m = (struct seq_file *)arg;
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unsigned int cur, next, i;
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seq_printf(m, "processor : %d\n", smp_processor_id());
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seq_printf(m, "C-SKY CPU model : %s\n", CSKYCPU_DEF_NAME);
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/* read processor id, max is 100 */
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cur = mfcr("cr13");
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for (i = 0; i < 100; i++) {
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seq_printf(m, "product info[%d] : 0x%08x\n", i, cur);
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next = mfcr("cr13");
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/* some CPU only has one id reg */
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if (cur == next)
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break;
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cur = next;
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/* cpid index is 31-28, reset */
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if (!(next >> 28)) {
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while ((mfcr("cr13") >> 28) != i);
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break;
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}
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}
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/* CPU feature regs, setup by bootloader or gdbinit */
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seq_printf(m, "hint (CPU funcs): 0x%08x\n", mfcr_hint());
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seq_printf(m, "ccr (L1C & MMU): 0x%08x\n", mfcr("cr18"));
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seq_printf(m, "ccr2 (L2C) : 0x%08x\n", mfcr_ccr2());
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seq_printf(m, "\n");
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}
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static int c_show(struct seq_file *m, void *v)
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{
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int cpu;
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for_each_online_cpu(cpu)
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smp_call_function_single(cpu, percpu_print, m, true);
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#ifdef CSKY_ARCH_VERSION
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seq_printf(m, "arch-version : %s\n", CSKY_ARCH_VERSION);
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seq_printf(m, "\n");
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#endif
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return 0;
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}
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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return *pos < 1 ? (void *)1 : NULL;
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}
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static void *c_next(struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return NULL;
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}
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static void c_stop(struct seq_file *m, void *v) {}
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const struct seq_operations cpuinfo_op = {
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.start = c_start,
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.next = c_next,
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.stop = c_stop,
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.show = c_show,
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};
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