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/*
* 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/mm.h>
#include <grub/misc.h>
#include <grub/types.h>
#include <grub/err.h>
#include <grub/term.h>
#include <grub/xen.h>
#include <grub/xen/relocator.h>
#include <grub/relocator_private.h>
typedef grub_addr_t grub_xen_reg_t;
struct grub_relocator_xen_paging_area {
grub_xen_reg_t start;
grub_xen_reg_t size;
} GRUB_PACKED;
extern grub_uint8_t grub_relocator_xen_start;
extern grub_uint8_t grub_relocator_xen_end;
extern grub_uint8_t grub_relocator_xen_remap_start;
extern grub_uint8_t grub_relocator_xen_remap_end;
extern grub_xen_reg_t grub_relocator_xen_stack;
extern grub_xen_reg_t grub_relocator_xen_start_info;
extern grub_xen_reg_t grub_relocator_xen_entry_point;
extern grub_xen_reg_t grub_relocator_xen_remapper_virt;
extern grub_xen_reg_t grub_relocator_xen_remapper_virt2;
extern grub_xen_reg_t grub_relocator_xen_remapper_map;
extern grub_xen_reg_t grub_relocator_xen_mfn_list;
extern struct grub_relocator_xen_paging_area
grub_relocator_xen_paging_areas[XEN_MAX_MAPPINGS];
extern grub_xen_reg_t grub_relocator_xen_remap_continue;
#ifdef __i386__
extern grub_xen_reg_t grub_relocator_xen_mmu_op_addr;
extern grub_xen_reg_t grub_relocator_xen_paging_areas_addr;
extern grub_xen_reg_t grub_relocator_xen_remapper_map_high;
#endif
extern mmuext_op_t grub_relocator_xen_mmu_op[3];
#define RELOCATOR_SIZEOF(x) (&grub_relocator##x##_end - &grub_relocator##x##_start)
grub_err_t
grub_relocator_xen_boot (struct grub_relocator *rel,
struct grub_relocator_xen_state state,
grub_uint64_t remapper_pfn,
grub_addr_t remapper_virt,
grub_uint64_t trampoline_pfn,
grub_addr_t trampoline_virt)
{
grub_err_t err;
void *relst;
int i;
grub_relocator_chunk_t ch, ch_tramp;
grub_xen_mfn_t *mfn_list =
(grub_xen_mfn_t *) grub_xen_start_page_addr->mfn_list;
err = grub_relocator_alloc_chunk_addr (rel, &ch, remapper_pfn << 12,
RELOCATOR_SIZEOF (_xen_remap));
if (err)
return err;
err = grub_relocator_alloc_chunk_addr (rel, &ch_tramp, trampoline_pfn << 12,
RELOCATOR_SIZEOF (_xen));
if (err)
return err;
grub_relocator_xen_stack = state.stack;
grub_relocator_xen_start_info = state.start_info;
grub_relocator_xen_entry_point = state.entry_point;
for (i = 0; i < XEN_MAX_MAPPINGS; i++)
{
grub_relocator_xen_paging_areas[i].start = state.paging_start[i];
grub_relocator_xen_paging_areas[i].size = state.paging_size[i];
}
grub_relocator_xen_remapper_virt = remapper_virt;
grub_relocator_xen_remapper_virt2 = remapper_virt;
grub_relocator_xen_remap_continue = trampoline_virt;
grub_relocator_xen_remapper_map = (mfn_list[remapper_pfn] << 12) | 5;
#ifdef __i386__
grub_relocator_xen_remapper_map_high = (mfn_list[remapper_pfn] >> 20);
grub_relocator_xen_mmu_op_addr = (char *) &grub_relocator_xen_mmu_op
- (char *) &grub_relocator_xen_remap_start + remapper_virt;
grub_relocator_xen_paging_areas_addr =
(char *) &grub_relocator_xen_paging_areas
- (char *) &grub_relocator_xen_remap_start + remapper_virt;
#endif
grub_relocator_xen_mfn_list = state.mfn_list;
grub_memset (grub_relocator_xen_mmu_op, 0,
sizeof (grub_relocator_xen_mmu_op));
#ifdef __i386__
grub_relocator_xen_mmu_op[0].cmd = MMUEXT_PIN_L3_TABLE;
#else
grub_relocator_xen_mmu_op[0].cmd = MMUEXT_PIN_L4_TABLE;
#endif
grub_relocator_xen_mmu_op[0].arg1.mfn = mfn_list[state.paging_start[0]];
grub_relocator_xen_mmu_op[1].cmd = MMUEXT_NEW_BASEPTR;
grub_relocator_xen_mmu_op[1].arg1.mfn = mfn_list[state.paging_start[0]];
grub_relocator_xen_mmu_op[2].cmd = MMUEXT_UNPIN_TABLE;
grub_relocator_xen_mmu_op[2].arg1.mfn =
mfn_list[grub_xen_start_page_addr->pt_base >> 12];
grub_memmove (get_virtual_current_address (ch),
&grub_relocator_xen_remap_start,
RELOCATOR_SIZEOF (_xen_remap));
grub_memmove (get_virtual_current_address (ch_tramp),
&grub_relocator_xen_start, RELOCATOR_SIZEOF (_xen));
err = grub_relocator_prepare_relocs (rel, get_physical_target_address (ch),
&relst, NULL);
if (err)
return err;
((void (*)(void)) relst) ();
/* Not reached. */
return GRUB_ERR_NONE;
}
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