kernel.img compiles on mipsel-qemu-r4k

kern/mipsel/qemu-r4k/init.c

@@ -0,0 +1,58 @@
+#include <grub/kernel.h>
+#include <grub/misc.h>
+#include <grub/env.h>
+#include <grub/time.h>
+#include <grub/types.h>
+#include <grub/misc.h>
+#include <grub/machine/kernel.h>
+#include <grub/cpu/kernel.h>
+
+grub_uint32_t
+grub_get_rtc (void)
+{
+  static int calln = 0;
+  return calln++;
+}
+
+void
+grub_machine_init (void)
+{
+}
+
+void
+grub_machine_fini (void)
+{
+}
+
+void
+grub_exit (void)
+{
+  while (1);
+}
+
+void
+grub_halt (void)
+{
+  while (1);
+}
+
+void
+grub_reboot (void)
+{
+  while (1);
+}
+
+void
+grub_machine_set_prefix (void)
+{
+  grub_env_set ("prefix", grub_prefix);
+}
+
+extern char _start[];
+extern char _end[];
+
+grub_addr_t
+grub_arch_modules_addr (void)
+{
+  return ALIGN_UP((grub_addr_t) _end + GRUB_MOD_GAP, GRUB_MOD_ALIGN);
+}

kern/mipsel/qemu-r4k/startup.S

@@ -0,0 +1,55 @@
+/* startup.S - Startup code for the MIPS.  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2009  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/symbol.h>
+#include <grub/cpu/kernel.h>
+#include <grub/machine/memory.h>
+
+.extern __bss_start
+.extern _end
+	
+	.globl __start, _start, start
+__start:
+_start:
+start:	
+	b codestart
+	. = _start + GRUB_KERNEL_CPU_PREFIX
+
+VARIABLE(grub_prefix)
+	/* to be filled by grub-mkelfimage */
+
+	/*
+	 *  Leave some breathing room for the prefix.
+	 */
+
+	. = _start + GRUB_KERNEL_CPU_DATA_END
+codestart:
+	lui $t1, %hi(__bss_start)
+	addiu $t1, %lo(__bss_start)
+	lui $t2, %hi(_end)
+	addiu $t2, %lo(_end)
+
+bsscont:
+	sb $0,0($t1)
+	addiu $t1,$t1,1
+	sltu $t3,$t1,$t2
+	bne $3, $0, bsscont
+
+	li $sp, GRUB_MACHINE_MEMORY_STACK_HIGH
+	b grub_main