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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:
776 bytes
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| 1 | /*
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| 2 | * SPDX-FileCopyrightText: 2005 Jakub Jermar
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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/ski.h>
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| 8 | #include <stdbool.h>
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| 9 | #include <stddef.h>
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| 10 |
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| 11 | #define SKI_INIT_CONSOLE 20
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| 12 | #define SKI_PUTCHAR 31
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| 13 |
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| 14 | static void ski_console_init(void)
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| 15 | {
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| 16 | static bool initialized = false;
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| 17 |
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| 18 | if (initialized)
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| 19 | return;
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| 20 |
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| 21 | asm volatile (
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| 22 | "mov r15 = %[cmd]\n"
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| 23 | "break 0x80000\n"
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| 24 | :
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| 25 | : [cmd] "i" (SKI_INIT_CONSOLE)
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| 26 | : "r15", "r8"
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| 27 | );
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| 28 |
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| 29 | initialized = true;
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| 30 | }
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| 31 |
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| 32 | void ski_putchar(char ch)
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| 33 | {
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| 34 | ski_console_init();
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| 35 |
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| 36 | if (ch == '\n')
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| 37 | ski_putchar('\r');
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| 38 |
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| 39 | asm volatile (
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| 40 | "mov r15 = %[cmd]\n"
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| 41 | "mov r32 = %[ch]\n" /* r32 is in0 */
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| 42 | "break 0x80000\n" /* modifies r8 */
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| 43 | :
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| 44 | : [cmd] "i" (SKI_PUTCHAR), [ch] "r" (ch)
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| 45 | : "r15", "in0", "r8"
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| 46 | );
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| 47 | }
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