Initial import of abandoned HQEMU version 2.5.2HEADmaster

1 files changed, 259 insertions, 0 deletions

diff --git a/src/roms/qemu-palcode/crb.c b/src/roms/qemu-palcode/crb.c
new file mode 100644
index 0000000..c79d4b2
--- /dev/null
+++ b/src/roms/qemu-palcode/crb.c
@@ -0,0 +1,259 @@
+/* Console Callback Routines.
+
+   Copyright (C) 2011 Richard Henderson
+
+   This file is part of QEMU PALcode.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the text
+   of the GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; see the file COPYING.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "hwrpb.h"
+#include "protos.h"
+#include "console.h"
+#include "uart.h"
+
+
+/* All routines use the high bit to signal error.  */
+#define ERR	0x8000000000000000ul
+
+
+unsigned long
+crb_getc(long unit)
+{
+  /* Multiple consoles not yet supported.  */
+  if (unit != 0)
+    return ERR;
+
+  return uart_getchar(COM1);
+}
+
+unsigned long
+crb_process_keycode(long unit, long keycode, long again)
+{
+  /* This routine might be needed for real keyboards, and mostly for
+     internationalization stuff.  */
+  /* Return Failure: routine not supported.  */
+  return 0xc000000000000000ul;
+}
+
+unsigned long
+crb_puts(long unit, const char *buf, unsigned long length)
+{
+  unsigned int orig_length = length;
+
+  /* Multiple consoles not yet supported.  */
+  if (unit != 0)
+    return ERR;
+
+  for (; length != 0; --length, ++buf)
+    uart_putchar_raw(COM1, (unsigned char)*buf);
+
+  /* Bits <31:0> of the return value are the number of bytes written.
+     To me that implies that the input value must be 32-bit, but v2
+     of the ARM doesn't explicitly say.  */
+  return orig_length;
+}
+
+unsigned long
+crb_reset_term(long unit)
+{
+  /* Multiple consoles not yet supported.  */
+  if (unit != 0)
+    return ERR;
+
+  uart_init_line(COM1, 9600);
+  return 0;
+}
+
+static unsigned long
+crb_set_term_ctl(long unit, long ctb)
+{
+  /* ??? The contents of the CTB do not seem to be defined anywhere.
+     How, therefore, can the user set new contents?  */
+  return ERR;
+}
+
+static unsigned long
+crb_set_term_int(long unit, long mask)
+{
+  /* We do no buffering, therefore we don't need to support interrupts.  */
+  if (unit != 0 || (mask & 0x22) != 0)
+    return ERR;
+  return 0;
+}
+
+unsigned long
+crb_open(const char *devstr,  unsigned long length)
+{
+  /* FIXME */
+  return ERR;
+}
+
+unsigned long
+crb_close(long channel)
+{
+  /* FIXME */
+  return 0;
+}
+
+static unsigned long
+crb_ioctl(long channel)
+{
+  /* We do not, nor will not, support virtual tapes.  */
+  return ERR;
+}
+
+unsigned long
+crb_read(long channel, unsigned long length, char *buf, unsigned long block)
+{
+  /* FIXME */
+  return ERR;
+}
+
+unsigned long
+crb_write(long channel, unsigned long length, const char *buf,
+          unsigned long block)
+{
+  /* FIXME */
+  return ERR;
+}
+
+unsigned long
+crb_get_env(unsigned long id, char *buf, unsigned long length)
+{
+  /* FIXME */
+  return 0xc000000000000000ul;
+}
+
+unsigned long
+crb_set_env(unsigned long id, const char *buf, unsigned long length)
+{
+  /* FIXME */
+  return 0xc000000000000000ul;
+}
+
+static unsigned long
+crb_reset_env(unsigned long id, char *buf, unsigned long length)
+{
+  /* FIXME */
+  return 0xc000000000000000ul;
+}
+
+static unsigned long
+crb_save_env(void)
+{
+  /* FIXME */
+  return 0xc000000000000000ul;
+}
+
+static unsigned long
+crb_pswitch(long action, long cpu_id)
+{
+  /* Why would we ever need to support switching primary processor?  */
+  return ERR;
+}
+
+static unsigned long __attribute__((used))
+int_crb_dispatch(long select, long a1, long a2, long a3, long a4)
+{
+  switch (select)
+    {
+    case CRB_GETC:
+      return crb_getc(a1);
+    case CRB_PUTS:
+      return crb_puts(a1, (const char *)a2, a3);
+    case CRB_RESET_TERM:
+      return crb_reset_term(a1);
+    case CRB_SET_TERM_INT:
+      return crb_set_term_int(a1, a2);
+    case CRB_SET_TERM_CTL:
+      return crb_set_term_ctl(a1, a2);
+    case CRB_PROCESS_KEYCODE:
+      return crb_process_keycode(a1, a2, a3);
+
+    case CRB_OPEN:
+      return crb_open((const char*)a1, a2);
+    case CRB_CLOSE:
+      return crb_close(a1);
+    case CRB_IOCTL:
+      return crb_ioctl(a1);
+    case CRB_READ:
+      return crb_read(a1, a2, (char *)a3, a4);
+    case CRB_WRITE:
+      return crb_write(a1, a2, (const char *)a3, a4);
+
+    case CRB_SET_ENV:
+      return crb_set_env(a1, (const char *)a2, a3);
+    case CRB_RESET_ENV:
+      return crb_reset_env(a1, (char *)a2, a3);
+    case CRB_GET_ENV:
+      return crb_get_env(a1, (char *)a2, a3);
+    case CRB_SAVE_ENV:
+      return crb_save_env();
+
+    case CRB_PSWITCH:
+      return crb_pswitch(a1, a2);
+    }
+  return ERR;
+}
+
+static unsigned long __attribute__((used))
+int_crb_fixup(unsigned long vptptr, unsigned long hwrpb)
+{
+  /* Given that this console is written to use the KSEG, and not be
+     mapped into any page-table address space, it doesn't seem like
+     we need to do anything at all here.  */
+  return 0;
+}
+
+/* The CRB DISPATCH and FIXUP functions are defined to use the VMS
+   calling convention.  This has several effects: 
+     (1) The set of call-saved registers is different.
+     (2) $27 contains the procdesc_struct, not the called function.
+   Map between the two calling conventions here.  */
+
+asm(".macro	VMStoUNIX name\n"
+"	.globl	\\name\n"
+"	.ent	\\name\n"
+"\\name:\n"
+"	.frame	$sp, 64, $26, 0\n"
+"	subq	$sp, 64, $sp\n"
+"	stq	$26, 0($sp)\n"
+"	stq	$2, 8($sp)\n"
+"	stq	$3, 16($sp)\n"
+"	stq	$4, 24($sp)\n"
+"	stq	$5, 32($sp)\n"
+"	stq	$6, 40($sp)\n"
+"	stq	$7, 48($sp)\n"
+"	stq	$8, 56($sp)\n"
+"	.mask	0x40001fc, 0\n"
+"	.prologue 2\n"
+"	br	$gp, .+4\n"
+"	ldgp	$gp, 0($gp)\n"
+"	bsr	$26, int_\\name !samegp\n"
+"	ldq	$26, 0($sp)\n"
+"	ldq	$2, 8($sp)\n"
+"	ldq	$3, 16($sp)\n"
+"	ldq	$4, 24($sp)\n"
+"	ldq	$5, 32($sp)\n"
+"	ldq	$6, 40($sp)\n"
+"	ldq	$7, 48($sp)\n"
+"	ldq	$8, 56($sp)\n"
+"	addq	$sp, 64, $sp\n"
+"	ret\n"
+"	.end	\\name\n"
+".endm\n"
+"	VMStoUNIX	crb_dispatch\n"
+"	VMStoUNIX	crb_fixup\n"
+);