mips64: Add support for 64-bit MIPS.

Author: heiher

configure.ac

@@ -109,7 +109,11 @@ case "$target_cpu" in
   i[[3456]]86)	target_cpu=i386 ;;
   amd64)	target_cpu=x86_64 ;;
   sparc)	target_cpu=sparc64 ;;
-  mipsel|mips64el)
+  mips64el)
+                target_cpu=mips64el
+		machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_CPU_MIPS64EL=1"
+		;;
+  mipsel)
                 target_cpu=mipsel
 		machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_CPU_MIPSEL=1"
 		;;
@@ -140,6 +144,7 @@ if test "x$with_platform" = x; then
     powerpc64-*) platform=ieee1275 ;;
     powerpc64le-*) platform=ieee1275 ;;
     sparc64-*) platform=ieee1275 ;;
+    mips64el-*) platform=efi;;
     mipsel-*) platform=loongson ;;
     mips-*) platform=arc ;;
     ia64-*) platform=efi ;;
@@ -192,6 +197,7 @@ case "$target_cpu"-"$platform" in
   mipsel-yeeloong) platform=loongson ;;
   mipsel-fuloong) platform=loongson ;;
   mipsel-loongson) ;;
+  mips64el-efi) ;;
   arm-uboot) ;;
   arm-coreboot) ;;
   arm-efi) ;;
@@ -1390,10 +1396,15 @@ grub_CHECK_PIC
 # movk's which aren't representable.
 # Since default varies across dictributions use either -fPIC or -fno-PIC
 # explicitly.
-if ( test x$target_cpu = xmips || test x$target_cpu = xmipsel || test x$target_cpu = xarm64 ) && test "x$grub_cv_cc_target_clang" = xyes ; then
+if ( test x$target_cpu = xmips || test x$target_cpu = xmipsel || test x$target_cpu = xarm64 || test x$target_cpu = xmips64el ) && test "x$grub_cv_cc_target_clang" = xyes ; then
    TARGET_CFLAGS="$TARGET_CFLAGS -fPIC"
 elif [ x"$pic_possible" = xyes ]; then
    TARGET_CFLAGS="$TARGET_CFLAGS -fno-PIC"
+fi
+# Don't generate SVR4-style position-independent code for MIPS64.
+if test x$target_cpu = xmips64el ; then
+   TARGET_CFLAGS="$TARGET_CFLAGS -mno-abicalls"
+   TARGET_CCASFLAGS="$TARGET_CCASFLAGS -mno-abicalls"
 fi]
 
 CFLAGS="$TARGET_CFLAGS"
@@ -2143,6 +2154,8 @@ AM_CONDITIONAL([COND_i386_xen], [test x$target_cpu = xi386 -a x$platform = xxen]
 AM_CONDITIONAL([COND_i386_xen_pvh], [test x$target_cpu = xi386 -a x$platform = xxen_pvh])
 AM_CONDITIONAL([COND_loongarch64], [test x$target_cpu = xloongarch64])
 AM_CONDITIONAL([COND_loongarch64_efi], [test x$target_cpu = xloongarch64 -a x$platform = xefi])
+AM_CONDITIONAL([COND_mips64el], [test x$target_cpu = xmips64el])
+AM_CONDITIONAL([COND_mips64_efi], [test x$target_cpu = xmips64el -a x$platform = xefi])
 AM_CONDITIONAL([COND_mips], [test x$target_cpu = xmips -o x$target_cpu = xmipsel])
 AM_CONDITIONAL([COND_mips_arc], [test "(" x$target_cpu = xmips -o x$target_cpu = xmipsel ")"  -a x$platform = xarc])
 AM_CONDITIONAL([COND_mips_loongson], [test x$target_cpu = xmipsel -a x$platform = xloongson])
@@ -2208,7 +2221,9 @@ AC_DEFINE_UNQUOTED(GRUB_SYSCONFDIR, "$grub_sysconfdir", [Configuration dir])
 # Output files.
 if test "$platform" != none; then
   cpudir="${target_cpu}"
-  if test x${cpudir} = xmipsel; then
+  if test x${cpudir} = xmips64el; then
+    cpudir=mips64;
+  elif test x${cpudir} = xmipsel; then
     cpudir=mips;
   fi
   grub_CHECK_LINK_DIR

gentpl.py

@@ -29,7 +29,7 @@
 GRUB_PLATFORMS = [ "emu", "i386_pc", "i386_efi", "i386_qemu", "i386_coreboot",
                    "i386_multiboot", "i386_ieee1275", "x86_64_efi",
                    "i386_xen", "x86_64_xen", "i386_xen_pvh",
-                   "mips_loongson", "sparc64_ieee1275",
+                   "mips_loongson", "mips64_efi", "sparc64_ieee1275",
                    "powerpc_ieee1275", "mips_arc", "ia64_efi",
                    "mips_qemu_mips", "arm_uboot", "arm_efi", "arm64_efi",
                    "arm_coreboot", "loongarch64_efi", "riscv32_efi", "riscv64_efi" ]
@@ -43,6 +43,7 @@
 GROUPS["x86_64"]      = [ "x86_64_efi" ]
 GROUPS["x86"]         = GROUPS["i386"] + GROUPS["x86_64"]
 GROUPS["mips"]        = [ "mips_loongson", "mips_qemu_mips", "mips_arc" ]
+GROUPS["mips64"]      = [ "mips64_efi" ]
 GROUPS["sparc64"]     = [ "sparc64_ieee1275" ]
 GROUPS["powerpc"]     = [ "powerpc_ieee1275" ]
 GROUPS["arm"]         = [ "arm_uboot", "arm_efi", "arm_coreboot" ]
@@ -52,7 +53,7 @@
 GROUPS["riscv64"]     = [ "riscv64_efi" ]
 
 # Groups based on firmware
-GROUPS["efi"]  = [ "i386_efi", "x86_64_efi", "ia64_efi", "arm_efi", "arm64_efi",
+GROUPS["efi"]  = [ "i386_efi", "x86_64_efi", "ia64_efi", "arm_efi", "arm64_efi", "mips64_efi",
 		   "loongarch64_efi", "riscv32_efi", "riscv64_efi" ]
 GROUPS["ieee1275"]   = [ "i386_ieee1275", "sparc64_ieee1275", "powerpc_ieee1275" ]
 GROUPS["uboot"] = [ "arm_uboot" ]

grub-core/Makefile.am

@@ -239,6 +239,12 @@ KERNEL_HEADER_FILES += $(top_builddir)/include/grub/machine/memory.h
 KERNEL_HEADER_FILES += $(top_builddir)/include/grub/machine/kernel.h
 endif
 
+if COND_mips64_efi
+KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/efi/efi.h
+KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/efi/disk.h
+KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/acpi.h
+endif
+
 if COND_powerpc_ieee1275
 KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/ieee1275/ieee1275.h
 KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/ieee1275/alloc.h

grub-core/Makefile.core.def

@@ -113,6 +113,9 @@ kernel = {
   arm_coreboot_ldflags       = '-Wl,-r';
   arm_coreboot_stripflags    = '--strip-unneeded -K start -R .note -R .comment -R .note.gnu.gold-version';
 
+  mips64_efi_ldflags          = '-Wl,-r,-d';
+  mips64_efi_stripflags       = '--strip-unneeded -K start -R .note -R .comment -R .note.gnu.gold-version -R .eh_frame -R .MIPS.abiflags';
+
   i386_pc_startup = kern/i386/pc/startup.S;
   i386_efi_startup = kern/i386/efi/startup.S;
   x86_64_efi_startup = kern/x86_64/efi/startup.S;
@@ -124,6 +127,7 @@ kernel = {
   i386_coreboot_startup = kern/i386/coreboot/startup.S;
   i386_multiboot_startup = kern/i386/coreboot/startup.S;
   mips_startup = kern/mips/startup.S;
+  mips64_efi_startup = kern/mips64/efi/startup.S;
   sparc64_ieee1275_startup = kern/sparc64/ieee1275/crt0.S;
   powerpc_ieee1275_startup = kern/powerpc/ieee1275/startup.S;
   arm_uboot_startup = kern/arm/startup.S;
@@ -328,6 +332,12 @@ kernel = {
   extra_dist = video/sis315_init.c;
   mips_loongson = commands/keylayouts.c;
 
+  mips64 = kern/mips64/init.c;
+  mips64 = kern/mips64/dl.c;
+  mips64 = kern/mips64/cache.S;
+  mips64 = kern/generic/rtc_get_time_ms.c;
+  mips64_efi = kern/mips64/efi/init.c;
+
   powerpc_ieee1275 = kern/powerpc/cache.S;
   powerpc_ieee1275 = kern/powerpc/dl.c;
   powerpc_ieee1275 = kern/powerpc/compiler-rt.S;
@@ -850,6 +860,7 @@ module = {
   enable = sparc64_ieee1275;
   enable = powerpc_ieee1275;
   enable = mips_arc;
+  enable = mips64_efi;
   enable = ia64_efi;
   enable = arm_efi;
   enable = arm64_efi;
@@ -1711,6 +1722,8 @@ module = {
   efi = lib/efi/relocator.c;
   mips = lib/mips/relocator_asm.S;
   mips = lib/mips/relocator.c;
+  mips64 = lib/mips64/relocator_asm.S;
+  mips64 = lib/mips64/relocator.c;
   powerpc = lib/powerpc/relocator_asm.S;
   powerpc = lib/powerpc/relocator.c;
   xen = lib/xen/relocator.c;
@@ -1723,6 +1736,7 @@ module = {
   extra_dist = kern/powerpc/cache_flush.S;
 
   enable = mips;
+  enable = mips64;
   enable = powerpc;
   enable = x86;
   enable = i386_xen_pvh;
@@ -1854,6 +1868,7 @@ module = {
   i386_pc = lib/i386/pc/vesa_modes_table.c;
   i386_xen_pvh = lib/i386/pc/vesa_modes_table.c;
   mips = loader/mips/linux.c;
+  mips64 = loader/mips64/linux.c;
   powerpc_ieee1275 = loader/powerpc/ieee1275/linux.c;
   sparc64_ieee1275 = loader/sparc64/ieee1275/linux.c;
   ia64_efi = loader/ia64/efi/linux.c;
@@ -1964,6 +1979,7 @@ module = {
   enable = riscv32_efi;
   enable = riscv64_efi;
   enable = mips;
+  enable = mips64_efi;
 };
 
 module = {

grub-core/kern/mips64/cache.S

@@ -0,0 +1,22 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2009,2017  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>
+
+FUNCTION (grub_arch_sync_caches)
+	jr.hb	$ra

grub-core/kern/mips64/dl.c

@@ -0,0 +1,149 @@
+/* dl-mips64.c - arch-dependent part of loadable module support */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2005,2007,2009,2017  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/dl.h>
+#include <grub/elf.h>
+#include <grub/misc.h>
+#include <grub/err.h>
+#include <grub/cpu/types.h>
+#include <grub/mm.h>
+#include <grub/i18n.h>
+
+/* Check if EHDR is a valid ELF header.  */
+grub_err_t
+grub_arch_dl_check_header (void *ehdr)
+{
+  Elf_Ehdr *e = ehdr;
+
+  /* Check the magic numbers.  */
+#ifdef GRUB_CPU_WORDS_BIGENDIAN
+  if (e->e_ident[EI_CLASS] != ELFCLASS64
+      || e->e_ident[EI_DATA] != ELFDATA2MSB
+      || e->e_machine != EM_MIPS)
+#else
+  if (e->e_ident[EI_CLASS] != ELFCLASS64
+      || e->e_ident[EI_DATA] != ELFDATA2LSB
+      || e->e_machine != EM_MIPS)
+#endif
+    return grub_error (GRUB_ERR_BAD_OS, N_("invalid arch-dependent ELF magic"));
+
+  return GRUB_ERR_NONE;
+}
+
+#pragma GCC diagnostic ignored "-Wcast-align"
+
+grub_err_t
+grub_arch_dl_get_tramp_got_size (const void *ehdr __attribute__ ((unused)),
+				 grub_size_t *tramp, grub_size_t *got)
+{
+  *tramp = 0;
+  *got = 0;
+  return GRUB_ERR_NONE;
+}
+
+/* Relocate symbols.  */
+grub_err_t
+grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
+			       Elf_Shdr *s, grub_dl_segment_t seg)
+{
+  Elf_Ehdr *e = ehdr;
+  Elf_Rel *rel, *max;
+
+  for (rel = (Elf_Rel *) ((char *) e + s->sh_offset),
+	 max = (Elf_Rel *) ((char *) rel + s->sh_size);
+       rel < max;
+       rel = (Elf_Rel *) ((char *) rel + s->sh_entsize))
+    {
+      grub_uint8_t *addr;
+      Elf_Sym *sym;
+      Elf_Addr r_info;
+      grub_uint64_t sym_value;
+
+      if (seg->size < rel->r_offset)
+	return grub_error (GRUB_ERR_BAD_MODULE,
+			   "reloc offset is out of the segment");
+
+      r_info = ((grub_uint64_t) rel->r_info << 32) |
+              (grub_uint32_t) grub_be_to_cpu64 (rel->r_info);
+
+      addr = (grub_uint8_t *) ((char *) seg->addr + rel->r_offset);
+      sym = (Elf_Sym *) ((char *) mod->symtab
+			 + mod->symsize * ELF_R_SYM (r_info));
+      sym_value = sym->st_value;
+      if (s->sh_type == SHT_RELA)
+	{
+	  sym_value += ((Elf_Rela *) rel)->r_addend;
+	}
+      switch (ELF_R_TYPE (r_info))
+	{
+	case R_MIPS_64:
+	  *(grub_uint64_t *) addr += sym_value;
+	  break;
+	case R_MIPS_32:
+	  *(grub_uint32_t *) addr += sym_value;
+	  break;
+	case R_MIPS_26:
+	  {
+	    grub_uint32_t value;
+	    grub_uint32_t raw;
+	    raw = (*(grub_uint32_t *) addr) & 0x3ffffff;
+	    value = raw << 2;
+	    value += sym_value;
+	    raw = (value >> 2) & 0x3ffffff;
+
+	    *(grub_uint32_t *) addr =
+	      raw | ((*(grub_uint32_t *) addr) & 0xfc000000);
+	  }
+	  break;
+	case R_MIPS_LO16:
+#ifdef GRUB_CPU_WORDS_BIGENDIAN
+	  addr += 2;
+#endif
+	  *(grub_uint16_t *) addr = (grub_int16_t) sym_value;
+	  break;
+	case R_MIPS_HI16:
+#ifdef GRUB_CPU_WORDS_BIGENDIAN
+	  addr += 2;
+#endif
+	  *(grub_uint16_t *) addr = (grub_int16_t) ((sym_value + 0x8000UL) >> 16);
+	  break;
+	case R_MIPS_HIGHER:
+#ifdef GRUB_CPU_WORDS_BIGENDIAN
+	  addr += 2;
+#endif
+	  *(grub_uint16_t *) addr = (grub_int16_t) ((sym_value + 0x80008000UL) >> 32);
+	  break;
+	case R_MIPS_HIGHEST:
+#ifdef GRUB_CPU_WORDS_BIGENDIAN
+	  addr += 2;
+#endif
+	  *(grub_uint16_t *) addr = (grub_uint16_t) ((sym_value + 0x800080008000UL) >> 48);
+	  break;
+	default:
+	  {
+	    return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
+			       N_("relocation 0x%x is not implemented yet"),
+			       ELF_R_TYPE (r_info));
+	  }
+	  break;
+	}
+    }
+
+  return GRUB_ERR_NONE;
+}

grub-core/kern/mips64/efi/init.c

@@ -0,0 +1,44 @@
+/* init.c - initialize an arm-based EFI system */
+/*
+ *  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/env.h>
+#include <grub/kernel.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/cpu/time.h>
+#include <grub/efi/efi.h>
+#include <grub/loader.h>
+
+void
+grub_machine_init (void)
+{
+  grub_efi_init ();
+
+  /* FIXME: Get cpuclock from EFI. */
+  grub_timer_init (1000000000U);
+}
+
+void
+grub_machine_fini (int flags)
+{
+  if (!(flags & GRUB_LOADER_FLAG_NORETURN))
+    return;
+
+  grub_efi_fini ();
+}