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Last change
on this file since d7f7a4a was d7f7a4a, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 4 years ago |
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Replace some license headers with SPDX identifier
Headers are replaced using tools/transorm-copyright.sh only
when it can be matched verbatim with the license header used
throughout most of the codebase.
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-
Property mode
set to
100644
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File size:
620 bytes
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| 1 | /*
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| 2 | * SPDX-FileCopyrightText: 2016 Martin Decky
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| 3 | *
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| 4 | * SPDX-License-Identifier: BSD-3-Clause
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| 5 | */
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| 6 |
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| 7 | #include <arch/ucb.h>
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| 8 | #include <arch/arch.h>
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| 9 | #include <macros.h>
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| 10 |
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| 11 | volatile uint64_t tohost __attribute__((section(".htif")));
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| 12 | volatile uint64_t fromhost __attribute__((section(".htif")));
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| 13 |
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| 14 | static void poll_fromhost()
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| 15 | {
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| 16 | uint64_t val = fromhost;
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| 17 | if (!val)
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| 18 | return;
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| 19 |
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| 20 | fromhost = 0;
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| 21 | }
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| 22 |
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| 23 | void htif_cmd(uint8_t device, uint8_t cmd, uint64_t payload)
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| 24 | {
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| 25 | uint64_t val = (((uint64_t) device) << 56) |
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| 26 | (((uint64_t) cmd) << 48) |
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| 27 | (payload & UINT64_C(0xffffffffffff));
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| 28 |
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| 29 | while (tohost)
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| 30 | poll_fromhost();
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| 31 |
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| 32 | tohost = val;
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| 33 | }
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