X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=arch%2Fnios2%2Fcpu%2Fcpu.c;h=756535a0b45df3e068231969eb75d49a4a85d7b7;hb=09140113108541b95d340f3c7b6ee597d31ccc73;hp=d9c654477d99569f23d031338dc693ee2cf7ed5d;hpb=f8736c2125f5bbbe7507e59c7b2c44ec17196aa3;p=oweals%2Fu-boot.git diff --git a/arch/nios2/cpu/cpu.c b/arch/nios2/cpu/cpu.c index d9c654477d..756535a0b4 100644 --- a/arch/nios2/cpu/cpu.c +++ b/arch/nios2/cpu/cpu.c @@ -1,49 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * (C) Copyright 2004, Psyent Corporation * Scott McNutt - * - * 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 -#include -#include +#include +#include +#include +#include +#include +#include +#include +#include -#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 : \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; }