diff options
| author | fishsoupisgood <github@madingley.org> | 2019-04-29 01:17:54 +0100 |
|---|---|---|
| committer | fishsoupisgood <github@madingley.org> | 2019-05-27 03:43:43 +0100 |
| commit | 3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch) | |
| tree | 65ca85f13617aee1dce474596800950f266a456c /roms/SLOF/board-js2x/llfw/board_io.S | |
| download | qemu-master.tar.gz qemu-master.tar.bz2 qemu-master.zip | |
Diffstat (limited to 'roms/SLOF/board-js2x/llfw/board_io.S')
| -rw-r--r-- | roms/SLOF/board-js2x/llfw/board_io.S | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/roms/SLOF/board-js2x/llfw/board_io.S b/roms/SLOF/board-js2x/llfw/board_io.S new file mode 100644 index 00000000..2f365883 --- /dev/null +++ b/roms/SLOF/board-js2x/llfw/board_io.S @@ -0,0 +1,62 @@ +/****************************************************************************** + * Copyright (c) 2004, 2008 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 + +C_ENTRY(copy_from_flash) +# size in GPR3 (multiple of 64), from GPR4, to GPR5 + mflr 24 ; mtctr 3 ; addi 4,4,-64 ; addi 5,5,-64 +0: SETCI(r0) + ldu 16,64(4) ; ld 17,8(4) ; ld 18,16(4) ; ld 19,24(4) + ld 20,32(4) ; ld 21,40(4) ; ld 22,48(4) ; ld 23,56(4) + CLRCI(r0) + stdu 16,64(5) ; std 17,8(5) ; std 18,16(5) ; std 19,24(5) + std 20,32(5) ; std 21,40(5) ; std 22,48(5) ; std 23,56(5) + sync ; icbi 0,2 ; bdnz 0b ; sync ; isync ; mtlr 24 ; blr + +/**************************************************************************** + * prints one character to serial console + * + * Input: + * R3 - character + * + * Returns: - + * + * Modifies Registers: + * R3, R4, R5, R6, R7 + ****************************************************************************/ +ENTRY(io_putchar) + mflr r7 + + SETCI(r0) + + # always use serial1 + li 4,0x3f8 ; oris 4,4,0xf400 + + # print one char +0: lbz 0,5(4) ; andi. 0,0,0x20 ; beq 0b ; stb 3,0(4) ; eieio + + # also print char to serial2 if on a JS21 + # read ID register: only if it is a PC87427 (JS21) also use serial2 + addi 4,4,-0x3f8 + li 5,0x20 ; stb 5,0x2e(4) ; lbz 5,0x2f(4) ; cmpdi 5,0xf2 ; bne 1f + + addi 4,4,0x2f8 +0: lbz 0,5(4) ; andi. 0,0,0x20 ; beq 0b ; stb 3,0(4) ; eieio + +1: CLRCI(r0) + + mtlr r7 + blr |