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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
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>
197 lines
4.4 KiB
C
197 lines
4.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2008 - 2013 Tensilica Inc.
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* (C) Copyright 2014 Cadence Design Systems Inc.
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*/
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#include <common.h>
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#include <command.h>
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#include <u-boot/zlib.h>
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#include <asm/byteorder.h>
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#include <asm/addrspace.h>
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#include <asm/bootparam.h>
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#include <asm/cache.h>
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#include <image.h>
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* Setup boot-parameters.
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*/
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static struct bp_tag *setup_first_tag(struct bp_tag *params)
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{
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params->id = BP_TAG_FIRST;
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params->size = sizeof(long);
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*(unsigned long *)¶ms->data = BP_VERSION;
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return bp_tag_next(params);
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}
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static struct bp_tag *setup_last_tag(struct bp_tag *params)
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{
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params->id = BP_TAG_LAST;
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params->size = 0;
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return bp_tag_next(params);
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}
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static struct bp_tag *setup_memory_tag(struct bp_tag *params)
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{
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struct bd_info *bd = gd->bd;
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struct meminfo *mem;
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params->id = BP_TAG_MEMORY;
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params->size = sizeof(struct meminfo);
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mem = (struct meminfo *)params->data;
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mem->type = MEMORY_TYPE_CONVENTIONAL;
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mem->start = bd->bi_memstart;
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mem->end = bd->bi_memstart + bd->bi_memsize;
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printf(" MEMORY: tag:0x%04x, type:0X%lx, start:0X%lx, end:0X%lx\n",
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BP_TAG_MEMORY, mem->type, mem->start, mem->end);
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return bp_tag_next(params);
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}
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static struct bp_tag *setup_commandline_tag(struct bp_tag *params,
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char *cmdline)
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{
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int len;
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if (!cmdline)
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return params;
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len = strlen(cmdline);
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params->id = BP_TAG_COMMAND_LINE;
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params->size = (len + 3) & -4;
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strcpy((char *)params->data, cmdline);
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printf(" COMMAND_LINE: tag:0x%04x, size:%u, data:'%s'\n",
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BP_TAG_COMMAND_LINE, params->size, cmdline);
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return bp_tag_next(params);
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}
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static struct bp_tag *setup_ramdisk_tag(struct bp_tag *params,
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unsigned long rd_start,
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unsigned long rd_end)
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{
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struct meminfo *mem;
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if (rd_start == rd_end)
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return params;
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/* Add a single banked memory */
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params->id = BP_TAG_INITRD;
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params->size = sizeof(struct meminfo);
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mem = (struct meminfo *)params->data;
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mem->type = MEMORY_TYPE_CONVENTIONAL;
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mem->start = PHYSADDR(rd_start);
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mem->end = PHYSADDR(rd_end);
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printf(" INITRD: tag:0x%x, type:0X%04lx, start:0X%lx, end:0X%lx\n",
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BP_TAG_INITRD, mem->type, mem->start, mem->end);
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return bp_tag_next(params);
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}
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static struct bp_tag *setup_serial_tag(struct bp_tag *params)
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{
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params->id = BP_TAG_SERIAL_BAUDRATE;
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params->size = sizeof(unsigned long);
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params->data[0] = gd->baudrate;
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printf(" SERIAL_BAUDRATE: tag:0x%04x, size:%u, baudrate:%lu\n",
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BP_TAG_SERIAL_BAUDRATE, params->size, params->data[0]);
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return bp_tag_next(params);
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}
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#ifdef CONFIG_OF_LIBFDT
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static struct bp_tag *setup_fdt_tag(struct bp_tag *params, void *fdt_start)
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{
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params->id = BP_TAG_FDT;
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params->size = sizeof(unsigned long);
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params->data[0] = (unsigned long)fdt_start;
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printf(" FDT: tag:0x%04x, size:%u, start:0x%lx\n",
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BP_TAG_FDT, params->size, params->data[0]);
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return bp_tag_next(params);
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}
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#endif
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/*
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* Boot Linux.
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*/
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int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
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{
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struct bp_tag *params, *params_start;
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ulong initrd_start, initrd_end;
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char *commandline = env_get("bootargs");
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if (!(flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)))
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return 0;
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show_boot_progress(15);
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if (images->rd_start) {
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initrd_start = images->rd_start;
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initrd_end = images->rd_end;
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} else {
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initrd_start = 0;
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initrd_end = 0;
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}
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params_start = (struct bp_tag *)gd->bd->bi_boot_params;
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params = params_start;
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params = setup_first_tag(params);
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params = setup_memory_tag(params);
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params = setup_commandline_tag(params, commandline);
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params = setup_serial_tag(params);
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if (initrd_start)
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params = setup_ramdisk_tag(params, initrd_start, initrd_end);
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#ifdef CONFIG_OF_LIBFDT
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if (images->ft_addr)
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params = setup_fdt_tag(params, images->ft_addr);
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#endif
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printf("\n");
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params = setup_last_tag(params);
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show_boot_progress(15);
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printf("Transferring Control to Linux @0x%08lx ...\n\n",
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(ulong)images->ep);
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flush_dcache_range((unsigned long)params_start, (unsigned long)params);
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if (flag & BOOTM_STATE_OS_FAKE_GO)
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return 0;
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/*
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* _start() in vmlinux expects boot params in register a2.
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* NOTE:
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* Disable/delete your u-boot breakpoints before stepping into linux.
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*/
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asm volatile ("mov a2, %0\n\t"
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"jx %1\n\t"
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: : "a" (params_start), "a" (images->ep)
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: "a2");
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/* Does not return */
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return 1;
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}
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