BootLinuxConsoleTest: Test the RX GDB simulator

Add two tests for the rx-gdbsim machine, based on the recommended
test setup from Yoshinori Sato:
https://lists.gnu.org/archive/html/qemu-devel/2019-05/msg03586.html

- U-Boot prompt
- Linux kernel with Sash shell

These are very quick tests:

  $ avocado run -t arch:rx tests/acceptance/machine_rx_gdbsim.py
  JOB ID     : 84a6ef01c0b87975ecbfcb31a920afd735753ace
  JOB LOG    : /home/phil/avocado/job-results/job-2019-05-24T05.02-84a6ef0/job.log
   (1/2) tests/acceptance/machine_rx_gdbsim.py:RxGdbSimMachine.test_uboot: PASS (0.11 s)
   (2/2) tests/acceptance/machine_rx_gdbsim.py:RxGdbSimMachine.test_linux_sash: PASS (0.45 s)
  RESULTS    : PASS 2 | ERROR 0 | FAIL 0 | SKIP 0 | WARN 0 | INTERRUPT 0 | CANCEL 0

Tests can also be run with:

  $ avocado --show=console run -t arch:rx tests/acceptance/machine_rx_gdbsim.py
  console: U-Boot 2016.05-rc3-23705-ga1ef3c71cb-dirty (Feb 05 2019 - 21:56:06 +0900)
  console: Linux version 4.19.0+ (yo-satoh@yo-satoh-debian) (gcc version 9.0.0 20181105 (experimental) (GCC)) #137 Wed Feb 20 23:20:02 JST 2019
  console: Built 1 zonelists, mobility grouping on.  Total pages: 8128
  ...
  console: SuperH (H)SCI(F) driver initialized
  console: 88240.serial: ttySC0 at MMIO 0x88240 (irq = 215, base_baud = 0) is a sci
  console: console [ttySC0] enabled
  console: 88248.serial: ttySC1 at MMIO 0x88248 (irq = 219, base_baud = 0) is a sci

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Message-Id: <20200224141923.82118-22-ysato@users.sourceforge.jp>
[PMD: Replace obsolete set_machine() by machine tag, and rename as gdbsim]
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

MAINTAINERS

@@ -1262,6 +1262,7 @@ rx-gdbsim
 M: Yoshinori Sato <ysato@users.sourceforge.jp>
 S: Maintained
 F: hw/rx/rx-gdbsim.c
+F: tests/acceptance/machine_rx_gdbsim.py
 
 SH4 Machines
 ------------

tests/acceptance/machine_rx_gdbsim.py

@@ -0,0 +1,68 @@
+# Functional test that boots a Linux kernel and checks the console
+#
+# Copyright (c) 2018 Red Hat, Inc.
+#
+# Author:
+#  Cleber Rosa <crosa@redhat.com>
+#
+# This work is licensed under the terms of the GNU GPL, version 2 or
+# later.  See the COPYING file in the top-level directory.
+
+from avocado_qemu import Test
+from avocado_qemu import exec_command_and_wait_for_pattern
+from avocado_qemu import wait_for_console_pattern
+from avocado.utils import archive
+
+
+class RxGdbSimMachine(Test):
+
+    timeout = 30
+    KERNEL_COMMON_COMMAND_LINE = 'printk.time=0 '
+
+    def test_uboot(self):
+        """
+        U-Boot and checks that the console is operational.
+
+        :avocado: tags=arch:rx
+        :avocado: tags=machine:gdbsim-r5f562n8
+        :avocado: tags=endian:little
+        """
+        uboot_url = ('https://acc.dl.osdn.jp/users/23/23888/u-boot.bin.gz')
+        uboot_hash = '9b78dbd43b40b2526848c0b1ce9de02c24f4dcdb'
+        uboot_path = self.fetch_asset(uboot_url, asset_hash=uboot_hash)
+        uboot_path = archive.uncompress(uboot_path, self.workdir)
+
+        self.vm.set_console()
+        self.vm.add_args('-bios', uboot_path,
+                         '-no-reboot')
+        self.vm.launch()
+        uboot_version = 'U-Boot 2016.05-rc3-23705-ga1ef3c71cb-dirty'
+        wait_for_console_pattern(self, uboot_version)
+        gcc_version = 'rx-unknown-linux-gcc (GCC) 9.0.0 20181105 (experimental)'
+        # FIXME limit baudrate on chardev, else we type too fast
+        #exec_command_and_wait_for_pattern(self, 'version', gcc_version)
+
+    def test_linux_sash(self):
+        """
+        Boots a Linux kernel and checks that the console is operational.
+
+        :avocado: tags=arch:rx
+        :avocado: tags=machine:gdbsim-r5f562n7
+        :avocado: tags=endian:little
+        """
+        dtb_url = ('https://acc.dl.osdn.jp/users/23/23887/rx-qemu.dtb')
+        dtb_hash = '7b4e4e2c71905da44e86ce47adee2210b026ac18'
+        dtb_path = self.fetch_asset(dtb_url, asset_hash=dtb_hash)
+        kernel_url = ('http://acc.dl.osdn.jp/users/23/23845/zImage')
+        kernel_hash = '39a81067f8d72faad90866ddfefa19165d68fc99'
+        kernel_path = self.fetch_asset(kernel_url, asset_hash=kernel_hash)
+
+        self.vm.set_console()
+        kernel_command_line = self.KERNEL_COMMON_COMMAND_LINE + 'earlycon'
+        self.vm.add_args('-kernel', kernel_path,
+                         '-dtb', dtb_path,
+                         '-no-reboot')
+        self.vm.launch()
+        wait_for_console_pattern(self, 'Sash command shell (version 1.1.1)',
+                                 failure_message='Kernel panic - not syncing')
+        exec_command_and_wait_for_pattern(self, 'printenv', 'TERM=linux')