+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2004, Psyent Corporation <www.psyent.com>
* Scott McNutt <smcnutt@psyent.com>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
*/
#include <common.h>
-#include <nios2.h>
-#include <nios2-io.h>
+#include <command.h>
+#include <cpu.h>
+#include <cpu_func.h>
+#include <dm.h>
+#include <errno.h>
+#include <init.h>
+#include <irq_func.h>
+#include <asm/cache.h>
-#if defined (CONFIG_SYS_NIOS_SYSID_BASE)
-extern void display_sysid (void);
-#endif /* CONFIG_SYS_NIOS_SYSID_BASE */
+DECLARE_GLOBAL_DATA_PTR;
-int checkcpu (void)
+#ifdef CONFIG_DISPLAY_CPUINFO
+int print_cpuinfo(void)
{
- printf ("CPU : Nios-II\n");
-#if !defined(CONFIG_SYS_NIOS_SYSID_BASE)
- printf ("SYSID : <unknown>\n");
-#else
- display_sysid ();
-#endif
- return (0);
+ printf("CPU: Nios-II\n");
+ return 0;
}
+#endif /* CONFIG_DISPLAY_CPUINFO */
+
+#ifdef CONFIG_ALTERA_SYSID
+int checkboard(void)
+{
+ display_sysid();
+ return 0;
+}
+#endif
-int do_reset(void)
+int do_reset(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
disable_interrupts();
/* indirect call to go beyond 256MB limitation of toolchain */
- nios2_callr(CONFIG_SYS_RESET_ADDR);
+ nios2_callr(gd->arch.reset_addr);
+ return 0;
+}
+
+/*
+ * COPY EXCEPTION TRAMPOLINE -- copy the tramp to the
+ * exception address. Define CONFIG_ROM_STUBS to prevent
+ * the copy (e.g. exception in flash or in other
+ * softare/firmware component).
+ */
+#ifndef CONFIG_ROM_STUBS
+static void copy_exception_trampoline(void)
+{
+ extern int _except_start, _except_end;
+ void *except_target = (void *)gd->arch.exception_addr;
+
+ if (&_except_start != except_target) {
+ memcpy(except_target, &_except_start,
+ &_except_end - &_except_start);
+ flush_cache(gd->arch.exception_addr,
+ &_except_end - &_except_start);
+ }
+}
+#endif
+
+int arch_cpu_init_dm(void)
+{
+ struct udevice *dev;
+ int ret;
+
+ ret = uclass_first_device_err(UCLASS_CPU, &dev);
+ if (ret)
+ return ret;
+
+ gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
+#ifndef CONFIG_ROM_STUBS
+ copy_exception_trampoline();
+#endif
+
+ return 0;
+}
+
+static int altera_nios2_get_desc(struct udevice *dev, char *buf, int size)
+{
+ const char *cpu_name = "Nios-II";
+
+ if (size < strlen(cpu_name))
+ return -ENOSPC;
+ strcpy(buf, cpu_name);
+
+ return 0;
+}
+
+static int altera_nios2_get_info(struct udevice *dev, struct cpu_info *info)
+{
+ info->cpu_freq = gd->cpu_clk;
+ info->features = (1 << CPU_FEAT_L1_CACHE) |
+ (gd->arch.has_mmu ? (1 << CPU_FEAT_MMU) : 0);
+
+ return 0;
+}
+
+static int altera_nios2_get_count(struct udevice *dev)
+{
+ return 1;
+}
+
+static int altera_nios2_probe(struct udevice *dev)
+{
+ const void *blob = gd->fdt_blob;
+ int node = dev_of_offset(dev);
+
+ gd->cpu_clk = fdtdec_get_int(blob, node,
+ "clock-frequency", 0);
+ gd->arch.dcache_line_size = fdtdec_get_int(blob, node,
+ "dcache-line-size", 0);
+ gd->arch.icache_line_size = fdtdec_get_int(blob, node,
+ "icache-line-size", 0);
+ gd->arch.dcache_size = fdtdec_get_int(blob, node,
+ "dcache-size", 0);
+ gd->arch.icache_size = fdtdec_get_int(blob, node,
+ "icache-size", 0);
+ gd->arch.reset_addr = fdtdec_get_int(blob, node,
+ "altr,reset-addr", 0);
+ gd->arch.exception_addr = fdtdec_get_int(blob, node,
+ "altr,exception-addr", 0);
+ gd->arch.has_initda = fdtdec_get_int(blob, node,
+ "altr,has-initda", 0);
+ gd->arch.has_mmu = fdtdec_get_int(blob, node,
+ "altr,has-mmu", 0);
+ gd->arch.io_region_base = gd->arch.has_mmu ? 0xe0000000 : 0x80000000;
+ gd->arch.mem_region_base = gd->arch.has_mmu ? 0xc0000000 : 0x00000000;
+ gd->arch.physaddr_mask = gd->arch.has_mmu ? 0x1fffffff : 0x7fffffff;
+
+ return 0;
+}
+
+static const struct cpu_ops altera_nios2_ops = {
+ .get_desc = altera_nios2_get_desc,
+ .get_info = altera_nios2_get_info,
+ .get_count = altera_nios2_get_count,
+};
+
+static const struct udevice_id altera_nios2_ids[] = {
+ { .compatible = "altr,nios2-1.0" },
+ { .compatible = "altr,nios2-1.1" },
+ { }
+};
+
+U_BOOT_DRIVER(altera_nios2) = {
+ .name = "altera_nios2",
+ .id = UCLASS_CPU,
+ .of_match = altera_nios2_ids,
+ .probe = altera_nios2_probe,
+ .ops = &altera_nios2_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+};
+
+/* This is a dummy function on nios2 */
+int dram_init(void)
+{
return 0;
}
projects / oweals / u-boot.git / blobdiff