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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>
57 lines
1.2 KiB
ArmAsm
57 lines
1.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2000, 2001
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* Erik Theisen, Wave 7 Optics, etheisen@mindspring.com.
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* base on code by
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#include <ppc_asm.tmpl>
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#include <ppc_defs.h>
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#include <config.h>
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#include <watchdog.h>
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/*
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* unsigned long long get_ticks(void);
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*
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* read timebase as "long long"
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*/
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.globl get_ticks
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get_ticks:
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1: mftbu r3
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mftb r4
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mftbu r5
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cmp 0,r3,r5
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bne 1b
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blr
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/*
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* Delay for a number of ticks
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*/
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.globl wait_ticks
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wait_ticks:
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stwu r1, -16(r1)
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mflr r0 /* save link register */
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stw r0, 20(r1) /* Use r0 or GDB will be unhappy */
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stw r14, 12(r1) /* save used registers */
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stw r15, 8(r1)
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mr r14, r3 /* save tick count */
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bl get_ticks /* Get start time */
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/* Calculate end time */
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addc r14, r4, r14 /* Compute end time lower */
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addze r15, r3 /* and end time upper */
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WATCHDOG_RESET /* Trigger watchdog, if needed */
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1: bl get_ticks /* Get current time */
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subfc r4, r4, r14 /* Subtract current time from end time */
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subfe. r3, r3, r15
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bge 1b /* Loop until time expired */
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lwz r15, 8(r1) /* restore saved registers */
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lwz r14, 12(r1)
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lwz r0, 20(r1)
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addi r1,r1,16
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mtlr r0
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blr
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