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https://github.com/AsahiLinux/u-boot
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aa6e94deab
The rest of the unmigrated CONFIG symbols in the CONFIG_SYS_SDRAM namespace do not easily transition to Kconfig. In many cases they likely should come from the device tree instead. Move these out of CONFIG namespace and in to CFG namespace. Signed-off-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org>
167 lines
3.8 KiB
C
167 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2004, Psyent Corporation <www.psyent.com>
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* Scott McNutt <smcnutt@psyent.com>
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*/
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#include <common.h>
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#include <command.h>
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#include <cpu.h>
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#include <cpu_func.h>
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#include <dm.h>
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#include <errno.h>
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#include <event.h>
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#include <init.h>
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#include <irq_func.h>
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#include <asm/cache.h>
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#include <asm/global_data.h>
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#include <asm/system.h>
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DECLARE_GLOBAL_DATA_PTR;
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#ifdef CONFIG_DISPLAY_CPUINFO
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int print_cpuinfo(void)
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{
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printf("CPU: Nios-II\n");
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return 0;
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}
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#endif /* CONFIG_DISPLAY_CPUINFO */
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#ifdef CONFIG_ALTERA_SYSID
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int checkboard(void)
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{
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display_sysid();
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return 0;
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}
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#endif
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int do_reset(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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disable_interrupts();
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/* indirect call to go beyond 256MB limitation of toolchain */
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nios2_callr(gd->arch.reset_addr);
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return 0;
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}
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/*
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* COPY EXCEPTION TRAMPOLINE -- copy the tramp to the
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* exception address. Define CONFIG_ROM_STUBS to prevent
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* the copy (e.g. exception in flash or in other
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* softare/firmware component).
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*/
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#ifndef CONFIG_ROM_STUBS
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static void copy_exception_trampoline(void)
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{
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extern int _except_start, _except_end;
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void *except_target = (void *)gd->arch.exception_addr;
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if (&_except_start != except_target) {
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memcpy(except_target, &_except_start,
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&_except_end - &_except_start);
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flush_cache(gd->arch.exception_addr,
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&_except_end - &_except_start);
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}
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}
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#endif
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static int nios_cpu_setup(void *ctx, struct event *event)
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{
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struct udevice *dev;
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int ret;
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ret = uclass_first_device_err(UCLASS_CPU, &dev);
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if (ret)
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return ret;
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gd->ram_size = CFG_SYS_SDRAM_SIZE;
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#ifndef CONFIG_ROM_STUBS
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copy_exception_trampoline();
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#endif
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return 0;
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}
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EVENT_SPY(EVT_DM_POST_INIT, nios_cpu_setup);
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static int altera_nios2_get_desc(const struct udevice *dev, char *buf,
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int size)
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{
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const char *cpu_name = "Nios-II";
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if (size < strlen(cpu_name))
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return -ENOSPC;
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strcpy(buf, cpu_name);
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return 0;
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}
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static int altera_nios2_get_info(const struct udevice *dev,
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struct cpu_info *info)
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{
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info->cpu_freq = gd->cpu_clk;
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info->features = (1 << CPU_FEAT_L1_CACHE) |
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(gd->arch.has_mmu ? (1 << CPU_FEAT_MMU) : 0);
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return 0;
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}
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static int altera_nios2_get_count(const struct udevice *dev)
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{
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return 1;
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}
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static int altera_nios2_probe(struct udevice *dev)
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{
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const void *blob = gd->fdt_blob;
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int node = dev_of_offset(dev);
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gd->cpu_clk = fdtdec_get_int(blob, node,
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"clock-frequency", 0);
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gd->arch.dcache_line_size = fdtdec_get_int(blob, node,
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"dcache-line-size", 0);
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gd->arch.icache_line_size = fdtdec_get_int(blob, node,
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"icache-line-size", 0);
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gd->arch.dcache_size = fdtdec_get_int(blob, node,
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"dcache-size", 0);
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gd->arch.icache_size = fdtdec_get_int(blob, node,
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"icache-size", 0);
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gd->arch.reset_addr = fdtdec_get_int(blob, node,
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"altr,reset-addr", 0);
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gd->arch.exception_addr = fdtdec_get_int(blob, node,
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"altr,exception-addr", 0);
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gd->arch.has_initda = fdtdec_get_int(blob, node,
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"altr,has-initda", 0);
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gd->arch.has_mmu = fdtdec_get_int(blob, node,
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"altr,has-mmu", 0);
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gd->arch.io_region_base = gd->arch.has_mmu ? 0xe0000000 : 0x80000000;
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gd->arch.mem_region_base = gd->arch.has_mmu ? 0xc0000000 : 0x00000000;
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gd->arch.physaddr_mask = gd->arch.has_mmu ? 0x1fffffff : 0x7fffffff;
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return 0;
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}
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static const struct cpu_ops altera_nios2_ops = {
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.get_desc = altera_nios2_get_desc,
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.get_info = altera_nios2_get_info,
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.get_count = altera_nios2_get_count,
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};
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static const struct udevice_id altera_nios2_ids[] = {
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{ .compatible = "altr,nios2-1.0" },
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{ .compatible = "altr,nios2-1.1" },
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{ }
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};
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U_BOOT_DRIVER(altera_nios2) = {
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.name = "altera_nios2",
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.id = UCLASS_CPU,
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.of_match = altera_nios2_ids,
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.probe = altera_nios2_probe,
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.ops = &altera_nios2_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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/* This is a dummy function on nios2 */
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int dram_init(void)
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{
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return 0;
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}
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