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-rw-r--r--grub-core/lib/powerpc/relocator.c140
-rw-r--r--grub-core/lib/powerpc/relocator_asm.S60
-rw-r--r--grub-core/lib/powerpc/setjmp.S89
3 files changed, 289 insertions, 0 deletions
diff --git a/grub-core/lib/powerpc/relocator.c b/grub-core/lib/powerpc/relocator.c
new file mode 100644
index 0000000..8ffb8b6
--- /dev/null
+++ b/grub-core/lib/powerpc/relocator.c
@@ -0,0 +1,140 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2009,2010 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/>.
+ */
+
+#include <grub/mm.h>
+#include <grub/misc.h>
+
+#include <grub/types.h>
+#include <grub/types.h>
+#include <grub/err.h>
+#include <grub/cache.h>
+
+#include <grub/powerpc/relocator.h>
+#include <grub/relocator_private.h>
+
+extern grub_uint8_t grub_relocator_forward_start;
+extern grub_uint8_t grub_relocator_forward_end;
+extern grub_uint8_t grub_relocator_backward_start;
+extern grub_uint8_t grub_relocator_backward_end;
+
+#define REGW_SIZEOF (2 * sizeof (grub_uint32_t))
+#define JUMP_SIZEOF (sizeof (grub_uint32_t))
+
+#define RELOCATOR_SRC_SIZEOF(x) (&grub_relocator_##x##_end \
+ - &grub_relocator_##x##_start)
+#define RELOCATOR_SIZEOF(x) (RELOCATOR_SRC_SIZEOF(x) \
+ + REGW_SIZEOF * 3)
+grub_size_t grub_relocator_align = sizeof (grub_uint32_t);
+grub_size_t grub_relocator_forward_size;
+grub_size_t grub_relocator_backward_size;
+grub_size_t grub_relocator_jumper_size = JUMP_SIZEOF + REGW_SIZEOF;
+
+void
+grub_cpu_relocator_init (void)
+{
+ grub_relocator_forward_size = RELOCATOR_SIZEOF(forward);
+ grub_relocator_backward_size = RELOCATOR_SIZEOF(backward);
+}
+
+static void
+write_reg (int regn, grub_uint32_t val, void **target)
+{
+ /* lis r, val >> 16 */
+ *(grub_uint32_t *) *target =
+ ((0x3c00 | (regn << 5)) << 16) | (val >> 16);
+ *target = ((grub_uint32_t *) *target) + 1;
+ /* ori r, r, val & 0xffff. */
+ *(grub_uint32_t *) *target = (((0x6000 | regn << 5 | regn) << 16)
+ | (val & 0xffff));
+ *target = ((grub_uint32_t *) *target) + 1;
+}
+
+static void
+write_jump (void **target)
+{
+ /* blr. */
+ *(grub_uint32_t *) *target = 0x4e800020;
+ *target = ((grub_uint32_t *) *target) + 1;
+}
+
+void
+grub_cpu_relocator_jumper (void *rels, grub_addr_t addr)
+{
+ write_reg (GRUB_PPC_JUMP_REGISTER, addr, &rels);
+ write_jump (&rels);
+}
+
+void
+grub_cpu_relocator_backward (void *ptr0, void *src, void *dest,
+ grub_size_t size)
+{
+ void *ptr = ptr0;
+ write_reg (8, (grub_uint32_t) src, &ptr);
+ write_reg (9, (grub_uint32_t) dest, &ptr);
+ write_reg (10, (grub_uint32_t) size, &ptr);
+ grub_memcpy (ptr, &grub_relocator_backward_start,
+ RELOCATOR_SRC_SIZEOF (backward));
+}
+
+void
+grub_cpu_relocator_forward (void *ptr0, void *src, void *dest,
+ grub_size_t size)
+{
+ void *ptr = ptr0;
+ write_reg (8, (grub_uint32_t) src, &ptr);
+ write_reg (9, (grub_uint32_t) dest, &ptr);
+ write_reg (10, (grub_uint32_t) size, &ptr);
+ grub_memcpy (ptr, &grub_relocator_forward_start,
+ RELOCATOR_SRC_SIZEOF (forward));
+}
+
+grub_err_t
+grub_relocator32_boot (struct grub_relocator *rel,
+ struct grub_relocator32_state state)
+{
+ void *ptr;
+ grub_err_t err;
+ void *relst;
+ grub_size_t relsize;
+ grub_size_t stateset_size = 32 * REGW_SIZEOF + JUMP_SIZEOF;
+ unsigned i;
+ grub_relocator_chunk_t ch;
+
+ err = grub_relocator_alloc_chunk_align (rel, &ch, 0, UP_TO_TOP32 (stateset_size),
+ stateset_size, sizeof (grub_uint32_t),
+ GRUB_RELOCATOR_PREFERENCE_NONE, 0);
+ if (err)
+ return err;
+
+ ptr = get_virtual_current_address (ch);
+ for (i = 0; i < 32; i++)
+ write_reg (i, state.gpr[i], &ptr);
+ write_jump (&ptr);
+
+ err = grub_relocator_prepare_relocs (rel, get_physical_target_address (ch),
+ &relst, &relsize);
+ if (err)
+ return err;
+
+ grub_arch_sync_caches ((void *) relst, relsize);
+
+ ((void (*) (void)) relst) ();
+
+ /* Not reached. */
+ return GRUB_ERR_NONE;
+}
diff --git a/grub-core/lib/powerpc/relocator_asm.S b/grub-core/lib/powerpc/relocator_asm.S
new file mode 100644
index 0000000..355e9c8
--- /dev/null
+++ b/grub-core/lib/powerpc/relocator_asm.S
@@ -0,0 +1,60 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2009,2010 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/>.
+ */
+
+#include <grub/symbol.h>
+
+ .p2align 4 /* force 16-byte alignment */
+
+VARIABLE (grub_relocator_forward_start)
+ mr 3, 9
+ mr 4, 10
+
+copycont1:
+ lbz 11,0(8)
+ stb 11,0(9)
+ addi 8, 8, 0x1
+ addi 9, 9, 0x1
+ addi 10, 10, -1
+ cmpwi 10, 0
+ bne copycont1
+
+#include "../../kern/powerpc/cache_flush.S"
+
+VARIABLE (grub_relocator_forward_end)
+
+VARIABLE (grub_relocator_backward_start)
+ mr 3, 9
+ mr 4, 10
+
+ add 9, 9, 10
+ add 8, 8, 10
+ /* Backward movsl is implicitly off-by-one. compensate that. */
+ addi 9, 9, -1
+ addi 8, 8, -1
+copycont2:
+ lbz 11,0(8)
+ stb 11,0(9)
+ addi 8, 8, -1
+ addi 9, 9, -1
+ addi 10, 10, -1
+ cmpwi 10, 0
+ bne copycont2
+
+#include "../../kern/powerpc/cache_flush.S"
+
+VARIABLE (grub_relocator_backward_end)
diff --git a/grub-core/lib/powerpc/setjmp.S b/grub-core/lib/powerpc/setjmp.S
new file mode 100644
index 0000000..716b563
--- /dev/null
+++ b/grub-core/lib/powerpc/setjmp.S
@@ -0,0 +1,89 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2004,2007 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/dl.h>
+
+ .file "setjmp.S"
+
+GRUB_MOD_LICENSE "GPLv3+"
+
+ .text
+
+/*
+ * int grub_setjmp (grub_jmp_buf env)
+ */
+FUNCTION(grub_setjmp)
+ stw 1, 0(3)
+ stw 14, 4(3)
+ stw 15, 8(3)
+ stw 16, 12(3)
+ stw 17, 16(3)
+ stw 18, 20(3)
+ stw 19, 24(3)
+ stw 20, 28(3)
+ stw 21, 32(3)
+ stw 22, 36(3)
+ stw 23, 40(3)
+ stw 24, 44(3)
+ stw 25, 48(3)
+ stw 26, 52(3)
+ stw 27, 56(3)
+ stw 28, 60(3)
+ stw 29, 64(3)
+ stw 30, 68(3)
+ stw 31, 72(3)
+ mflr 4
+ stw 4, 76(3)
+ mfcr 4
+ stw 4, 80(3)
+ li 3, 0
+ blr
+
+/*
+ * int grub_longjmp (grub_jmp_buf env, int val)
+ */
+FUNCTION(grub_longjmp)
+ lwz 1, 0(3)
+ lwz 14, 4(3)
+ lwz 15, 8(3)
+ lwz 16, 12(3)
+ lwz 17, 16(3)
+ lwz 18, 20(3)
+ lwz 19, 24(3)
+ lwz 20, 28(3)
+ lwz 21, 32(3)
+ lwz 22, 36(3)
+ lwz 23, 40(3)
+ lwz 24, 44(3)
+ lwz 25, 48(3)
+ lwz 26, 52(3)
+ lwz 27, 56(3)
+ lwz 28, 60(3)
+ lwz 29, 64(3)
+ lwz 30, 68(3)
+ lwz 31, 72(3)
+ lwz 5, 76(3)
+ mtlr 5
+ lwz 5, 80(3)
+ mtcr 5
+ mr. 3, 4
+ bne 1f
+ li 3, 1
+1: blr
+
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