diff options
Diffstat (limited to 'grub-core/bus/bonito.c')
| -rw-r--r-- | grub-core/bus/bonito.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/grub-core/bus/bonito.c b/grub-core/bus/bonito.c new file mode 100644 index 0000000..9a63f07 --- /dev/null +++ b/grub-core/bus/bonito.c @@ -0,0 +1,176 @@ +/* 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"); + } +} |