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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 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/relocator.h>
#include <grub/relocator_private.h>
#include <grub/memory.h>
#include <grub/ieee1275/ieee1275.h>
/* Helper for grub_relocator_firmware_get_max_events. */
static int
count (grub_uint64_t addr __attribute__ ((unused)),
grub_uint64_t len __attribute__ ((unused)),
grub_memory_type_t type __attribute__ ((unused)), void *data)
{
int *counter = data;
(*counter)++;
return 0;
}
unsigned
grub_relocator_firmware_get_max_events (void)
{
int counter = 0;
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_FORCE_CLAIM))
return 0;
grub_machine_mmap_iterate (count, &counter);
return 2 * counter;
}
/* Context for grub_relocator_firmware_fill_events. */
struct grub_relocator_firmware_fill_events_ctx
{
struct grub_relocator_mmap_event *events;
int counter;
};
/* Helper for grub_relocator_firmware_fill_events. */
static int
grub_relocator_firmware_fill_events_iter (grub_uint64_t addr,
grub_uint64_t len,
grub_memory_type_t type, void *data)
{
struct grub_relocator_firmware_fill_events_ctx *ctx = data;
if (type != GRUB_MEMORY_AVAILABLE)
return 0;
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NO_PRE1_5M_CLAIM))
{
if (addr + len <= 0x180000)
return 0;
if (addr < 0x180000)
{
len = addr + len - 0x180000;
addr = 0x180000;
}
}
ctx->events[ctx->counter].type = REG_FIRMWARE_START;
ctx->events[ctx->counter].pos = addr;
ctx->counter++;
ctx->events[ctx->counter].type = REG_FIRMWARE_END;
ctx->events[ctx->counter].pos = addr + len;
ctx->counter++;
return 0;
}
unsigned
grub_relocator_firmware_fill_events (struct grub_relocator_mmap_event *events)
{
struct grub_relocator_firmware_fill_events_ctx ctx = {
.events = events,
.counter = 0
};
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_FORCE_CLAIM))
return 0;
grub_machine_mmap_iterate (grub_relocator_firmware_fill_events_iter, &ctx);
return ctx.counter;
}
int
grub_relocator_firmware_alloc_region (grub_addr_t start, grub_size_t size)
{
grub_err_t err;
err = grub_claimmap (start, size);
grub_errno = 0;
return (err == 0);
}
void
grub_relocator_firmware_free_region (grub_addr_t start, grub_size_t size)
{
grub_ieee1275_release (start, size);
}
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