1 files changed, 147 insertions, 0 deletions
diff --git a/grub-core/term/i386/coreboot/cbmemc.c b/grub-core/term/i386/coreboot/cbmemc.c
new file mode 100644
index 0000000..cea9b84
--- /dev/null
+++ b/grub-core/term/i386/coreboot/cbmemc.c
@@ -0,0 +1,147 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2013  Free Software Foundation, Inc.
+ *
+ *  GRUB 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 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB 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
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/term.h>
+#include <grub/types.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/time.h>
+#include <grub/terminfo.h>
+#include <grub/dl.h>
+#include <grub/coreboot/lbio.h>
+#include <grub/command.h>
+#include <grub/normal.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+#define CURSOR_MASK ((1 << 28) - 1)
+#define OVERFLOW (1 << 31)
+
+struct grub_linuxbios_cbmemc
+{
+  grub_uint32_t size;
+  grub_uint32_t cursor;
+  char body[0];
+};
+
+static struct grub_linuxbios_cbmemc *cbmemc;
+
+static void
+put (struct grub_term_output *term __attribute__ ((unused)), const int c)
+{
+  grub_uint32_t flags, cursor;
+  if (!cbmemc)
+    return;
+  flags = cbmemc->cursor & ~CURSOR_MASK;
+  cursor = cbmemc->cursor & CURSOR_MASK;
+  if (cursor >= cbmemc->size)
+    return;
+  cbmemc->body[cursor++] = c;
+  if (cursor >= cbmemc->size)
+    {
+      cursor = 0;
+      flags |= OVERFLOW;
+    }
+  cbmemc->cursor = flags | cursor;
+}
+
+struct grub_terminfo_output_state grub_cbmemc_terminfo_output =
+  {
+    .put = put,
+    .size = { 80, 24 }
+  };
+
+static struct grub_term_output grub_cbmemc_term_output =
+  {
+    .name = "cbmemc",
+    .init = grub_terminfo_output_init,
+    .fini = 0,
+    .putchar = grub_terminfo_putchar,
+    .getxy = grub_terminfo_getxy,
+    .getwh = grub_terminfo_getwh,
+    .gotoxy = grub_terminfo_gotoxy,
+    .cls = grub_terminfo_cls,
+    .setcolorstate = grub_terminfo_setcolorstate,
+    .setcursor = grub_terminfo_setcursor,
+    .flags = GRUB_TERM_CODE_TYPE_ASCII,
+    .data = &grub_cbmemc_terminfo_output,
+    .progress_update_divisor = GRUB_PROGRESS_NO_UPDATE
+  };
+
+static int
+iterate_linuxbios_table (grub_linuxbios_table_item_t table_item,
+			 void *data __attribute__ ((unused)))
+{
+  if (table_item->tag != GRUB_LINUXBIOS_MEMBER_CBMEMC)
+    return 0;
+  cbmemc = (struct grub_linuxbios_cbmemc *) (grub_addr_t)
+    *(grub_uint64_t *) (table_item + 1);
+  return 1;
+}
+
+static grub_err_t
+grub_cmd_cbmemc (struct grub_command *cmd __attribute__ ((unused)),
+		 int argc __attribute__ ((unused)),
+		 char *argv[] __attribute__ ((unused)))
+{
+  grub_size_t size, cursor;
+  struct grub_linuxbios_cbmemc *real_cbmemc;
+
+  if (!cbmemc)
+    return grub_error (GRUB_ERR_IO, "no CBMEM console found");
+
+  real_cbmemc = cbmemc;
+  cbmemc = 0;
+  cursor = real_cbmemc->cursor & CURSOR_MASK;
+  if (!(real_cbmemc->cursor & OVERFLOW) && cursor < real_cbmemc->size)
+    size = cursor;
+  else
+    size = real_cbmemc->size;
+  if (real_cbmemc->cursor & OVERFLOW)
+    {
+      if (cursor > size)
+        cursor = 0;
+      grub_xnputs(real_cbmemc->body + cursor, size - cursor);
+      grub_xnputs(real_cbmemc->body, cursor);
+    }
+  else
+    grub_xnputs(real_cbmemc->body, size);
+  cbmemc = real_cbmemc;
+  return 0;
+}
+
+static grub_command_t cmd;
+
+GRUB_MOD_INIT (cbmemc)
+{
+  grub_linuxbios_table_iterate (iterate_linuxbios_table, 0);
+
+  if (cbmemc)
+    grub_term_register_output ("cbmemc", &grub_cbmemc_term_output);
+
+  cmd =
+    grub_register_command ("cbmemc", grub_cmd_cbmemc,
+			   0, N_("Show CBMEM console content."));
+}
+
+
+GRUB_MOD_FINI (cbmemc)
+{
+  grub_term_unregister_output (&grub_cbmemc_term_output);
+  grub_unregister_command (cmd);
+}