diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/SLOF/board-qemu/llfw/board_io.S | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/SLOF/board-qemu/llfw/board_io.S')
| -rw-r--r-- | roms/SLOF/board-qemu/llfw/board_io.S | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/roms/SLOF/board-qemu/llfw/board_io.S b/roms/SLOF/board-qemu/llfw/board_io.S new file mode 100644 index 000000000..7d572ab18 --- /dev/null +++ b/roms/SLOF/board-qemu/llfw/board_io.S @@ -0,0 +1,46 @@ +/****************************************************************************** + * Copyright (c) 2004, 2011 IBM Corporation + * All rights reserved. + * This program and the accompanying materials + * are made available under the terms of the BSD License + * which accompanies this distribution, and is available at + * http://www.opensource.org/licenses/bsd-license.php + * + * Contributors: + * IBM Corporation - initial implementation + *****************************************************************************/ + +#include <macros.h> +#include <cpu.h> + + .text + +/**************************************************************************** + * prints one character to serial console + * + * Input: + * R3 - character + * + * Returns: - + * + * Modifies Registers: + * R3, R4, R5, R6, R7 + ****************************************************************************/ +ENTRY(io_putchar) + sldi r6,r3,(24+32) + li r3,0x58 + li r4,0 + li r5,1 + .long 0x44000022 + blr + +ENTRY(io_getchar) + mr r10,r3 + li r3,0x54 + li r4,0 + .long 0x44000022 + mr. r3,r4 + beq 1f + srdi r3,r5,(24+32) + stb r3,0(r10) +1: blr |