mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +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>
42 lines
951 B
ArmAsm
42 lines
951 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Utility functions for FEL mode.
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*
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* Copyright (c) 2015 Google, Inc
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*/
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#include <asm-offsets.h>
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#include <config.h>
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#include <asm/system.h>
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#include <linux/linkage.h>
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ENTRY(save_boot_params)
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ldr r0, =fel_stash
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str sp, [r0, #0]
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str lr, [r0, #4]
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mrs lr, cpsr @ Read CPSR
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str lr, [r0, #8]
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mrc p15, 0, lr, c1, c0, 0 @ Read CP15 SCTLR Register
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str lr, [r0, #12]
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mrc p15, 0, lr, c12, c0, 0 @ Read VBAR
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str lr, [r0, #16]
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mrc p15, 0, lr, c1, c0, 0 @ Read CP15 Control Register
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str lr, [r0, #20]
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b save_boot_params_ret
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ENDPROC(save_boot_params)
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ENTRY(return_to_fel)
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mov sp, r0
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mov lr, r1
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ldr r0, =fel_stash
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ldr r1, [r0, #20]
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mcr p15, 0, r1, c1, c0, 0 @ Write CP15 Control Register
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ldr r1, [r0, #16]
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mcr p15, 0, r1, c12, c0, 0 @ Write VBAR
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ldr r1, [r0, #12]
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mcr p15, 0, r1, c1, c0, 0 @ Write CP15 SCTLR Register
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ldr r1, [r0, #8]
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msr cpsr, r1 @ Write CPSR
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bx lr
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ENDPROC(return_to_fel)
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