diff options
Diffstat (limited to 'grub-core/lib/powerpc')
| -rw-r--r-- | grub-core/lib/powerpc/relocator.c | 140 | ||||
| -rw-r--r-- | grub-core/lib/powerpc/relocator_asm.S | 60 | ||||
| -rw-r--r-- | grub-core/lib/powerpc/setjmp.S | 89 |
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 + |