--- /dev/null
+/* 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"
+);
Code Review / kvmfornfv.git / blobdiff