// SPDX-License-Identifier: GPL-2.0 #include <linux/pci.h> #include <linux/acpi.h> #include <acpi/reboot.h>
void acpi_reboot(void) { struct acpi_generic_address *rr; struct pci_bus *bus0; u8 reset_value; unsigned int devfn; if (acpi_disabled) return; rr = &acpi_gbl_FADT.reset_register; /* ACPI reset register was only introduced with v2 of the FADT */ if (acpi_gbl_FADT.header.revision < 2) return; /* Is the reset register supported? The spec says we should be * checking the bit width and bit offset, but Windows ignores * these fields */ if (!(acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)) return; reset_value = acpi_gbl_FADT.reset_value; /* The reset register can only exist in I/O, Memory or PCI config space * on a device on bus 0. */ switch (rr->space_id) { case ACPI_ADR_SPACE_PCI_CONFIG: /* The reset register can only live on bus 0. */ bus0 = pci_find_bus(0, 0); if (!bus0) return; /* Form PCI device/function pair. */ devfn = PCI_DEVFN((rr->address >> 32) & 0xffff, (rr->address >> 16) & 0xffff); printk(KERN_DEBUG "Resetting with ACPI PCI RESET_REG."); /* Write the value that resets us. */ pci_bus_write_config_byte(bus0, devfn, (rr->address & 0xffff), reset_value); break; case ACPI_ADR_SPACE_SYSTEM_MEMORY: case ACPI_ADR_SPACE_SYSTEM_IO: printk(KERN_DEBUG "ACPI MEMORY or I/O RESET_REG.\n"); acpi_reset(); break; } }Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Aaron Durbin | 135 | 83.33% | 1 | 20.00% |
| Matthew Garrett | 13 | 8.02% | 2 | 40.00% |
| Linus Torvalds | 12 | 7.41% | 1 | 20.00% |
| Lin Ming | 2 | 1.23% | 1 | 20.00% |
| Total | 162 | 100.00% | 5 | 100.00% |
| Person | Tokens | Prop | Commits | CommitProp |
| Aaron Durbin | 144 | 83.72% | 1 | 16.67% |
| Matthew Garrett | 13 | 7.56% | 2 | 33.33% |
| Linus Torvalds | 12 | 6.98% | 1 | 16.67% |
| Lin Ming | 2 | 1.16% | 1 | 16.67% |
| Greg Kroah-Hartman | 1 | 0.58% | 1 | 16.67% |
| Total | 172 | 100.00% | 6 | 100.00% |