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/* bonito.c - PCI bonito interface. */
/*
* 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/pci.h>
#include <grub/misc.h>
static grub_uint32_t base_win[GRUB_MACHINE_PCI_NUM_WIN];
static const grub_size_t sizes_win[GRUB_MACHINE_PCI_NUM_WIN] =
{GRUB_MACHINE_PCI_WIN1_SIZE, GRUB_MACHINE_PCI_WIN_SIZE,
GRUB_MACHINE_PCI_WIN_SIZE};
/* Usage counters. */
static int usage_win[GRUB_MACHINE_PCI_NUM_WIN];
static grub_addr_t addr_win[GRUB_MACHINE_PCI_NUM_WIN] =
{GRUB_MACHINE_PCI_WIN1_ADDR, GRUB_MACHINE_PCI_WIN2_ADDR,
GRUB_MACHINE_PCI_WIN3_ADDR};
static inline void
write_bases (void)
{
int i;
grub_uint32_t reg = 0;
for (i = 0; i < GRUB_MACHINE_PCI_NUM_WIN; i++)
reg |= (((base_win[i] >> GRUB_MACHINE_PCI_WIN_SHIFT)
& GRUB_MACHINE_PCI_WIN_MASK)
<< (i * GRUB_MACHINE_PCI_WIN_MASK_SIZE));
GRUB_MACHINE_PCI_IO_CTRL_REG = reg;
}
volatile void *
grub_pci_device_map_range (grub_pci_device_t dev __attribute__ ((unused)),
grub_addr_t base, grub_size_t size)
{
int i;
grub_addr_t newbase;
/* First try already used registers. */
for (i = 0; i < GRUB_MACHINE_PCI_NUM_WIN; i++)
if (usage_win[i] && base_win[i] <= base
&& base_win[i] + sizes_win[i] > base + size)
{
usage_win[i]++;
return (void *)
(addr_win[i] | (base & GRUB_MACHINE_PCI_WIN_OFFSET_MASK));
}
/* Map new register. */
newbase = base & ~GRUB_MACHINE_PCI_WIN_OFFSET_MASK;
for (i = 0; i < GRUB_MACHINE_PCI_NUM_WIN; i++)
if (!usage_win[i] && newbase <= base
&& newbase + sizes_win[i] > base + size)
{
usage_win[i]++;
base_win[i] = newbase;
write_bases ();
return (void *)
(addr_win[i] | (base & GRUB_MACHINE_PCI_WIN_OFFSET_MASK));
}
grub_fatal ("Out of PCI windows.");
}
void
grub_pci_device_unmap_range (grub_pci_device_t dev __attribute__ ((unused)),
volatile void *mem __attribute__ ((unused)),
grub_size_t size __attribute__ ((unused)))
{
int i;
for (i = 0; i < GRUB_MACHINE_PCI_NUM_WIN; i++)
if (usage_win[i] && addr_win[i]
== (((grub_addr_t) mem) & ~GRUB_MACHINE_PCI_WIN_OFFSET_MASK))
{
usage_win[i]--;
return;
}
grub_fatal ("Tried to unmap not mapped region");
}
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