| /* 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"); |
| } |
| } |