mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-13 14:46:21 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
158 lines
3.5 KiB
C
158 lines
3.5 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 <cpu.h>
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#include <dm.h>
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#include <errno.h>
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#include <asm/cache.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(cmd_tbl_t *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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int arch_cpu_init_dm(void)
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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 = CONFIG_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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static int altera_nios2_get_desc(struct udevice *dev, char *buf, 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(struct udevice *dev, 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(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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