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Prekernel: Implement print_hex UART function on aarch64

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This allows us to print a hex number to the serial
terminal.
This commit is contained in:
Jesse Buhagiar 2021-10-16 23:54:28 +11:00 • committed by Brian Gianforcaro
parent 7b237e5028
commit 28e36a70d6
1 changed files with 18 additions and 0 deletions
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18
Kernel/Prekernel/Arch/aarch64/UART.h
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2021, Nico Weber <thakis@chromium.org>
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -38,6 +39,23 @@ public:
send(buf[i]);
}
void print_hex(u64 n)
{
char buf[17];
static const char* digits = "0123456789ABCDEF";
int i = 0;
do {
buf[i++] = digits[n % 16];
n /= 16;
} while (n);
send(static_cast<u32>('0'));
send(static_cast<u32>('x'));
buf[16] = '\0';
for (i--; i >= 0; i--) {
send(buf[i]);
}
}
private:
UART();