mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-14 15:16:16 +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>
119 lines
2.5 KiB
C
119 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
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*/
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#include <asm/cache.h>
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#include <common.h>
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DECLARE_GLOBAL_DATA_PTR;
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static ulong get_sp(void)
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{
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ulong ret;
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asm("mov %0, sp" : "=r"(ret) : );
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return ret;
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}
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void arch_lmb_reserve(struct lmb *lmb)
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{
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ulong sp;
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/*
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* Booting a (Linux) kernel image
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*
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* Allocate space for command line and board info - the
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* address should be as high as possible within the reach of
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* the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
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* memory, which means far enough below the current stack
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* pointer.
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*/
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sp = get_sp();
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debug("## Current stack ends at 0x%08lx ", sp);
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/* adjust sp by 4K to be safe */
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sp -= 4096;
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lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp));
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}
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static int cleanup_before_linux(void)
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{
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disable_interrupts();
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sync_n_cleanup_cache_all();
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return 0;
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}
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__weak int board_prep_linux(bootm_headers_t *images) { return 0; }
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/* Subcommand: PREP */
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static int boot_prep_linux(bootm_headers_t *images)
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{
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int ret;
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ret = image_setup_linux(images);
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if (ret)
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return ret;
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return board_prep_linux(images);
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}
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/* Generic implementation for single core CPU */
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__weak void board_jump_and_run(ulong entry, int zero, int arch, uint params)
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{
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void (*kernel_entry)(int zero, int arch, uint params);
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kernel_entry = (void (*)(int, int, uint))entry;
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kernel_entry(zero, arch, params);
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}
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/* Subcommand: GO */
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static void boot_jump_linux(bootm_headers_t *images, int flag)
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{
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ulong kernel_entry;
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unsigned int r0, r2;
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int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
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kernel_entry = images->ep;
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debug("## Transferring control to Linux (at address %08lx)...\n",
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kernel_entry);
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bootstage_mark(BOOTSTAGE_ID_RUN_OS);
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printf("\nStarting kernel ...%s\n\n", fake ?
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"(fake run for tracing)" : "");
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bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
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if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
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r0 = 2;
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r2 = (unsigned int)images->ft_addr;
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} else {
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r0 = 1;
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r2 = (unsigned int)env_get("bootargs");
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}
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cleanup_before_linux();
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if (!fake)
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board_jump_and_run(kernel_entry, r0, 0, r2);
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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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/* No need for those on ARC */
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if ((flag & BOOTM_STATE_OS_BD_T) || (flag & BOOTM_STATE_OS_CMDLINE))
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return -1;
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if (flag & BOOTM_STATE_OS_PREP)
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return boot_prep_linux(images);
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if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
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boot_jump_linux(images, flag);
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return 0;
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}
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return -1;
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}
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