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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};
grub_bonito_type_t grub_bonito_type;
static volatile void *
config_addr (grub_pci_address_t addr)
{
if (grub_bonito_type == GRUB_BONITO_2F)
{
GRUB_MACHINE_PCI_CONF_CTRL_REG_2F = 1 << ((addr >> 11) & 0xf);
return (volatile void *) (GRUB_MACHINE_PCI_CONFSPACE_2F
| (addr & 0x07ff));
}
else
{
if (addr >> 16)
return (volatile void *) (GRUB_MACHINE_PCI_CONFSPACE_3A_EXT | addr);
else
return (volatile void *) (GRUB_MACHINE_PCI_CONFSPACE_3A | addr);
}
}
grub_uint32_t
grub_pci_read (grub_pci_address_t addr)
{
return *(volatile grub_uint32_t *) config_addr (addr);
}
grub_uint16_t
grub_pci_read_word (grub_pci_address_t addr)
{
return *(volatile grub_uint16_t *) config_addr (addr);
}
grub_uint8_t
grub_pci_read_byte (grub_pci_address_t addr)
{
return *(volatile grub_uint8_t *) config_addr (addr);
}
void
grub_pci_write (grub_pci_address_t addr, grub_uint32_t data)
{
*(volatile grub_uint32_t *) config_addr (addr) = data;
}
void
grub_pci_write_word (grub_pci_address_t addr, grub_uint16_t data)
{
*(volatile grub_uint16_t *) config_addr (addr) = data;
}
void
grub_pci_write_byte (grub_pci_address_t addr, grub_uint8_t data)
{
*(volatile grub_uint8_t *) config_addr (addr) = data;
}
static inline void
write_bases_2f (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_2F = reg;
}
volatile void *
grub_pci_device_map_range (grub_pci_device_t dev __attribute__ ((unused)),
grub_addr_t base, grub_size_t size)
{
if (grub_bonito_type == GRUB_BONITO_2F)
{
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_2f ();
return (void *)
(addr_win[i] | (base & GRUB_MACHINE_PCI_WIN_OFFSET_MASK));
}
grub_fatal ("Out of PCI windows.");
}
else
{
int region = 0;
if (base >= 0x10000000
&& base + size <= 0x18000000)
region = 1;
if (base >= 0x1c000000
&& base + size <= 0x1f000000)
region = 2;
if (region == 0)
grub_fatal ("Attempt to map out of regions");
return (void *) (0xa0000000 | base);
}
}
void *
grub_pci_device_map_range_cached (grub_pci_device_t dev,
grub_addr_t base, grub_size_t size)
{
return (void *) (((grub_addr_t) grub_pci_device_map_range (dev, base, size))
& ~0x20000000);
}
void
grub_pci_device_unmap_range (grub_pci_device_t dev __attribute__ ((unused)),
volatile void *mem,
grub_size_t size __attribute__ ((unused)))
{
if (grub_bonito_type == GRUB_BONITO_2F)
{
int i;
for (i = 0; i < GRUB_MACHINE_PCI_NUM_WIN; i++)
if (usage_win[i] && addr_win[i]
== (((grub_addr_t) mem | 0x20000000)
& ~GRUB_MACHINE_PCI_WIN_OFFSET_MASK))
{
usage_win[i]--;
return;
}
grub_fatal ("Tried to unmap not mapped region");
}
}
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