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serial: OK, works on QEMU

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Ciro Santilli
2019-08-24 00:00:04 +00:00
parent 750402af91
commit ae070757a0
2 changed files with 14 additions and 9 deletions
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2
Makefile
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@@ -11,7 +11,7 @@ GAS_EXT ?= .S
NASM_EXT ?= .asm NASM_EXT ?= .asm
OBJ_EXT ?= .o OBJ_EXT ?= .o
OUT_EXT ?= .img OUT_EXT ?= .img
QEMU ?= qemu-system-i386 -drive 'file=$(RUN_FILE),format=raw' -smp 2 QEMU ?= qemu-system-i386 -drive 'file=$(RUN_FILE),format=raw' -serial mon:stdio -smp 2
RUN ?= bios_hello_world RUN ?= bios_hello_world
RUN_ARGS ?= -soundhw pcspk RUN_ARGS ?= -soundhw pcspk
TMP_EXT ?= .tmp TMP_EXT ?= .tmp

21
README.adoc
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@@ -2116,19 +2116,24 @@ What the heck is a serial in the real world: https://unix.stackexchange.com/ques
Currently all text output is done the display, and that was a newbie design choice from before I knew the serial existed. The serial is just generally more minimal and elegant than the display, and should have been used instead. Currently all text output is done the display, and that was a newbie design choice from before I knew the serial existed. The serial is just generally more minimal and elegant than the display, and should have been used instead.
TODO: get working on QEMU, working on Bochs: ....
./run bios_hello_world_serial
cat bios_hello_world_serial.tmp.serial
....
On QEMU, we see the serial output on the host terminal:
....
hello world
....
and on Bochs we redirect it to a file:
.... ....
./run bios_hello_world_serial bochs ./run bios_hello_world_serial bochs
cat bios_hello_world_serial.tmp.serial cat bios_hello_world_serial.tmp.serial
.... ....
The file content:
....
hello world
....
Source: link:bios_hello_world_serial.S[] Source: link:bios_hello_world_serial.S[]
Bibliography: Bibliography:
@@ -2140,7 +2145,7 @@ This would open up:
* gem5 benchmarking and exploration, currently blocked on https://stackoverflow.com/questions/50364863/how-to-get-graphical-gui-output-and-user-touch-keyboard-mouse-input-in-a-ful/50364864#50364864 * gem5 benchmarking and exploration, currently blocked on https://stackoverflow.com/questions/50364863/how-to-get-graphical-gui-output-and-user-touch-keyboard-mouse-input-in-a-ful/50364864#50364864
* automated unit tests. Ha, like I'm gonna be that diligent! * automated unit tests. Ha, like I'm gonna be that diligent!
* easily working on ARM in a more uniform way * easily working on ARM in a more uniform way to prepare for the move in to https://github.com/cirosantilli/linux-kernel-module-cheat/tree/87e846fc1f9c57840e143513ebd69c638bd37aa8#baremetal-setup
=== Macros vs functions === Macros vs functions