438e7af141
Caps, Num and Scroll Lock now light their LEDs on PS/2 and USB keyboards, share one state between keyboards, and stop toggling on key repeat. X sets them through evdev writes while it holds the keyboard. Unmapping memory in a process with threads on other CPUs now flushes their TLBs with an IPI. Without it a freed page stayed reachable through stale translations, which corrupted Epiphany's heap on SMP. ACPI batteries and AC adapters appear under /sys/class/power_supply. /proc/<pid>/maps lists file mappings, and a process killed by a fault names the file and offset it died in. r8169 gets a 256-entry RX ring. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
52 lines
2.3 KiB
C
52 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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// ACPI, in two layers.
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//
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// kernel/arch/x86_64/acpi.c reads the static tables at boot, before anything
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// else can run: the MADT for the processors and the I/O APIC and its
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// interrupt source overrides, the FADT for the PM timer.
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//
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// kernel/acpi/ is everything that needs AML, which is the firmware's own code
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// and has to be interpreted: uACPI (ports/uacpi) runs it, and aml.c uses it
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// for PCI interrupt routing, the power button, power-off and reset. Every
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// function below that depends on it does nothing, and says so by returning
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// -1, on a machine whose AML could not be loaded.
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// The RSDP's physical address, or 0 if there is none.
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uint64 acpi_rsdp_phys(void);
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// The GSI an ISA IRQ is wired to, after the MADT's interrupt source
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// overrides, and its trigger mode (an IRQ_* from irq.h) in *mode. `dflt` is
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// the mode when the override says "conforms to the bus" or there is none:
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// edge/high for an ISA device, level/low for the SCI.
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int acpi_isa_gsi(int isa, int dflt, int *mode);
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// Load and initialize the namespace. After kinit, before pci_init.
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void acpi_aml_init(void);
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// The worker thread that runs AML on behalf of interrupts. After sinit.
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void acpi_thread_start(void);
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// Route every PCI device's INTx through _PRT. From pci_init, before binding.
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void acpi_pci_route(void);
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int acpi_poweroff(void); // S5; returns only on failure
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void acpi_poweroff_now(void); // S5 from a panic, no AML; returns only on failure
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int acpi_reboot(void); // the FADT reset register; ditto
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// Batteries and AC adapters, for /sys/class/power_supply. Units are the
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// battery's own: unit 0 is mW/mWh, 1 is mA/mAh; ACPI_UNKNOWN where the
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// firmware does not say.
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#define ACPI_UNKNOWN 0xFFFFFFFFu
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struct acpi_psu {
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int battery; // else an AC adapter
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int present; // battery: in the bay
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int online; // adapter: plugged in
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int unit;
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uint32 state; // _BST: 1 discharging, 2 charging, 4 critical
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uint32 rate, remaining, voltage; // _BST, voltage in mV
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uint32 design, full, design_voltage, cycles;
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int technology; // 0 primary, 1 rechargeable
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char model[32], serial[32], kind[16], oem[32];
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};
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int acpi_psu_count(void);
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int acpi_psu_get(int i, struct acpi_psu *out);
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