fish

4 files changed, 269 insertions, 0 deletions

diff --git a/grub-core/kern/powerpc/cache.S b/grub-core/kern/powerpc/cache.S
new file mode 100644
index 0000000..d85e68d
--- /dev/null
+++ b/grub-core/kern/powerpc/cache.S
@@ -0,0 +1,26 @@
+/* cache.S - Flush the processor cache for a specific region.  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2004,2007,2010  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/>.
+ */
+
+	.text
+
+	.align 2
+	.globl grub_arch_sync_caches
+grub_arch_sync_caches:
+#include "cache_flush.S"
+	blr
diff --git a/grub-core/kern/powerpc/cache_flush.S b/grub-core/kern/powerpc/cache_flush.S
new file mode 100644
index 0000000..1410f78
--- /dev/null
+++ b/grub-core/kern/powerpc/cache_flush.S
@@ -0,0 +1,43 @@
+/* cache.S - Flush the processor cache for a specific region.  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2004,2007,2010  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/>.
+ */
+
+#undef CACHE_LINE_BYTES
+#define CACHE_LINE_BYTES 32
+
+	/* `address' may not be CACHE_LINE_BYTES-aligned.  */
+	andi. 6, 3, CACHE_LINE_BYTES - 1 /* Find the misalignment.  */
+	add 4, 4, 6 /* Adjust `size' to compensate.  */
+
+	/* Force the dcache lines to memory.  */
+	li 5, 0
+1:	dcbst 5, 3
+	addi 5, 5, CACHE_LINE_BYTES
+	cmpw 5, 4
+	blt 1b
+	sync            /* Force all dcbsts to complete.  */
+
+	/* Invalidate the icache lines.  */
+	li 5, 0
+1:	icbi 5, 3
+	addi 5, 5, CACHE_LINE_BYTES
+	cmpw 5, 4
+	blt 1b
+	sync            /* Force all icbis to complete.  */
+	isync           /* Discard partially executed instructions that were
+		           loaded from the invalid icache.  */
diff --git a/grub-core/kern/powerpc/dl.c b/grub-core/kern/powerpc/dl.c
new file mode 100644
index 0000000..ad19e56
--- /dev/null
+++ b/grub-core/kern/powerpc/dl.c
@@ -0,0 +1,136 @@
+/* dl.c - arch-dependent part of loadable module support */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2004,2005,2007,2009  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/dl.h>
+#include <grub/elf.h>
+#include <grub/misc.h>
+#include <grub/err.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.  */
+  if (e->e_ident[EI_CLASS] != ELFCLASS32
+      || e->e_ident[EI_DATA] != ELFDATA2MSB
+      || e->e_machine != EM_PPC)
+    return grub_error (GRUB_ERR_BAD_OS, "invalid arch specific ELF magic");
+
+  return GRUB_ERR_NONE;
+}
+
+
+/* Relocate symbols.  */
+grub_err_t
+grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
+{
+  Elf_Ehdr *e = ehdr;
+  Elf_Shdr *s;
+  Elf_Word entsize;
+  unsigned i;
+
+  /* Find a symbol table.  */
+  for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff);
+       i < e->e_shnum;
+       i++, s = (Elf_Shdr *) ((char *) s + e->e_shentsize))
+    if (s->sh_type == SHT_SYMTAB)
+      break;
+
+  if (i == e->e_shnum)
+    return grub_error (GRUB_ERR_BAD_MODULE, "no symtab found");
+
+  entsize = s->sh_entsize;
+
+  for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff);
+       i < e->e_shnum;
+       i++, s = (Elf_Shdr *) ((char *) s + e->e_shentsize))
+    if (s->sh_type == SHT_RELA)
+      {
+	grub_dl_segment_t seg;
+
+	/* Find the target segment.  */
+	for (seg = mod->segment; seg; seg = seg->next)
+	  if (seg->section == s->sh_info)
+	    break;
+
+	if (seg)
+	  {
+	    Elf_Rela *rel, *max;
+
+	    for (rel = (Elf_Rela *) ((char *) e + s->sh_offset),
+		   max = rel + s->sh_size / s->sh_entsize;
+		 rel < max;
+		 rel++)
+	      {
+		Elf_Word *addr;
+		Elf_Sym *sym;
+		grub_uint32_t value;
+
+		if (seg->size < rel->r_offset)
+		  return grub_error (GRUB_ERR_BAD_MODULE,
+				     "reloc offset is out of the segment");
+
+		addr = (Elf_Word *) ((char *) seg->addr + rel->r_offset);
+		sym = (Elf_Sym *) ((char *) mod->symtab
+				     + entsize * ELF_R_SYM (rel->r_info));
+
+		/* On the PPC the value does not have an explicit
+		   addend, add it.  */
+		value = sym->st_value + rel->r_addend;
+		switch (ELF_R_TYPE (rel->r_info))
+		  {
+		  case R_PPC_ADDR16_LO:
+		    *(Elf_Half *) addr = value;
+		    break;
+
+		  case R_PPC_REL24:
+		    {
+		      Elf_Sword delta = value - (Elf_Word) addr;
+
+		      if (delta << 6 >> 6 != delta)
+			return grub_error (GRUB_ERR_BAD_MODULE, "relocation overflow");
+		      *addr = (*addr & 0xfc000003) | (delta & 0x3fffffc);
+		      break;
+		    }
+
+		  case R_PPC_ADDR16_HA:
+		    *(Elf_Half *) addr = (value + 0x8000) >> 16;
+		    break;
+
+		  case R_PPC_ADDR32:
+		    *addr = value;
+		    break;
+
+		  case R_PPC_REL32:
+		    *addr = value - (Elf_Word) addr;
+		    break;
+
+		  default:
+		    return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
+				       "this relocation (%d) is not implemented yet",
+				       ELF_R_TYPE (rel->r_info));
+		  }
+	      }
+	  }
+      }
+
+  return GRUB_ERR_NONE;
+}
diff --git a/grub-core/kern/powerpc/ieee1275/startup.S b/grub-core/kern/powerpc/ieee1275/startup.S
new file mode 100644
index 0000000..0b1c233
--- /dev/null
+++ b/grub-core/kern/powerpc/ieee1275/startup.S
@@ -0,0 +1,64 @@
+/* startup.S - Startup code for the PowerPC.  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2003,2004,2005,2007,2008  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/offsets.h>
+
+.extern __bss_start
+.extern _end
+
+	.text
+	.align	2
+	.globl	start, _start
+start:
+_start:
+	b	codestart
+
+	. = _start + GRUB_KERNEL_MACHINE_PREFIX
+
+VARIABLE(grub_prefix)
+	/* to be filled by grub-mkimage */
+
+	/*
+	 *  Leave some breathing room for the prefix.
+	 */
+
+	. = _start + GRUB_KERNEL_MACHINE_PREFIX_END
+
+codestart:
+	li      2, 0
+	li      13, 0
+
+	/* Stage1 won't zero BSS for us. In other cases, why not do it again?  */
+	lis	6, (__bss_start - 4)@h
+	ori	6, 6, (__bss_start - 4)@l
+	lis	7, (_end - 4)@h
+	ori	7, 7, (_end - 4)@l
+	subf	7, 6, 7
+	srwi	7, 7, 2 /* We store 4 bytes at a time.  */
+	mtctr	7
+2:	stwu	2, 4(6) /* We know r2 is already 0 from above.  */
+	bdnz	2b
+
+	/* Store r5 in grub_ieee1275_entry_fn.  */
+	lis	9, grub_ieee1275_entry_fn@ha
+	stw	5, grub_ieee1275_entry_fn@l(9)
+
+	bl	grub_main
+1:	b	1b