Merge tag 'hppa64-pull-request' of https://github.com/hdeller/qemu-hppa into staging

target/hppa: Enhancements and fixes

Some enhancements and fixes for the hppa target.

The major change is, that this patchset adds a new SeaBIOS-hppa firmware
which is built as 32- and 64-bit firmware.
The new 64-bit firmware is necessary to fully support 64-bit operating systems
(HP-UX, Linux, NetBSD,...).

# -----BEGIN PGP SIGNATURE-----
#
# iHUEABYKAB0WIQS86RI+GtKfB8BJu973ErUQojoPXwUCZcquAQAKCRD3ErUQojoP
# X9pjAQCVsWyuYlGCW2paIGVWKV0vsOpwetUrbhRtFUZGqZxb4AD9FbMsXRcCN/oq
# CotBPY/a8MEzIQcwYl5QbcI5nNW4ygs=
# =RA0B
# -----END PGP SIGNATURE-----
# gpg: Signature made Mon 12 Feb 2024 23:47:13 GMT
# gpg:                using EDDSA key BCE9123E1AD29F07C049BBDEF712B510A23A0F5F
# gpg: Good signature from "Helge Deller <deller@gmx.de>" [unknown]
# gpg:                 aka "Helge Deller <deller@kernel.org>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 4544 8228 2CD9 10DB EF3D  25F8 3E5F 3D04 A7A2 4603
#      Subkey fingerprint: BCE9 123E 1AD2 9F07 C049  BBDE F712 B510 A23A 0F5F

* tag 'hppa64-pull-request' of https://github.com/hdeller/qemu-hppa:
  hw/hppa/machine: Load 64-bit firmware on 64-bit machines
  target/hppa: Update SeaBIOS-hppa to version 16
  hw/net/tulip: add chip status register values
  target/hppa: PDC_BTLB_INFO uses 32-bit ints
  target/hppa: Allow read-access to PSW with rsm 0,reg instruction
  lasi: Add reset I/O ports for LASI audio and FDC
  target/hppa: Implement do_transaction_failed handler for I/O errors
  lasi: allow access to LAN MAC address registers
  hw/pci-host/astro: Implement Hard Fail and Soft Fail mode
  hw/pci-host/astro: Avoid aborting on access failure
  target/hppa: Add "diag 0x101" for console output support
  disas/hppa: Add disassembly for qemu specific instructions

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/target/hppa/sys_helper.c b/target/hppa/sys_helper.c
index a59245eed3..4a31748342 100644
--- a/target/hppa/sys_helper.c
+++ b/target/hppa/sys_helper.c
@@ -23,6 +23,8 @@
 #include "exec/helper-proto.h"
 #include "qemu/timer.h"
 #include "sysemu/runstate.h"
+#include "sysemu/sysemu.h"
+#include "chardev/char-fe.h"
 
 void HELPER(write_interval_timer)(CPUHPPAState *env, target_ulong val)
 {
@@ -109,3 +111,37 @@ void HELPER(rfi_r)(CPUHPPAState *env)
     helper_getshadowregs(env);
     helper_rfi(env);
 }
+
+#ifndef CONFIG_USER_ONLY
+/*
+ * diag_console_output() is a helper function used during the initial bootup
+ * process of the SeaBIOS-hppa firmware.  During the bootup phase, addresses of
+ * serial ports on e.g. PCI busses are unknown and most other devices haven't
+ * been initialized and configured yet.  With help of a simple "diag" assembler
+ * instruction and an ASCII character code in register %r26 firmware can easily
+ * print debug output without any dependencies to the first serial port and use
+ * that as serial console.
+ */
+void HELPER(diag_console_output)(CPUHPPAState *env)
+{
+    CharBackend *serial_backend;
+    Chardev *serial_port;
+    unsigned char c;
+
+    /* find first serial port */
+    serial_port = serial_hd(0);
+    if (!serial_port) {
+        return;
+    }
+
+    /* get serial_backend for the serial port */
+    serial_backend = serial_port->be;
+    if (!serial_backend ||
+        !qemu_chr_fe_backend_connected(serial_backend)) {
+        return;
+    }
+
+    c = (unsigned char)env->gr[26];
+    qemu_chr_fe_write(serial_backend, &c, sizeof(c));
+}
+#endif