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2 dayskernel/amd64: Improve GDT implementationQuinn Stephens
* Switched to using macros for the GDT entry bits, to improve clarity and make the code easier to modify. Also got rid of some junk values in a few of the entries. * Shrunk the GDT data array from 256 entries to 7 (GDT_ENTRY_COUNT) since the GDT will only ever use 7 of the entries for now. * Aligned the GDT using __cacheline_aligned, because the GDT entries will be read every time a segment selector is loaded. * Modified code dealing with the GDTR to just use `g_gdtr`, since the same GDT/GDTR is always used. * In `gdt_load()`, changed `eax` -> `ax`, since segment registers are only 16 bits. Also replaced the `gdtr` to just use `g_gdtr`. Additionally, used the inline assembly formatting to supply segment selectors with KERNEL_CS/DS macros. Signed-off-by: Quinn Stephens <quinn@osmora.org> Signed-off-by: Ian Moffett <ian@osmora.org>
5 dayskernel/amd64: Deprecate intr_alloc_vector()mainIan Moffett
Replace intr_alloc_vector() with a cleaner and more machine independent intr_register() Signed-off-by: Ian Moffett <ian@osmora.org>
7 dayskernel/amd64: ioapic: Do not include acpi/tables.hIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
8 dayskernel/amd64: trap: Clear interrupts on trap entryIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
8 dayskernel: Add cpu_halt_others() and harden panic()Ian Moffett
Ensure interrupts are disabled at the start of panic() to prevent any interrupts from further degrading the state of the system. Also adds a newline before "panic: " to clean up the logs. Signed-off-by: Ian Moffett <ian@osmora.org>
10 dayskernel: mach: Add TF_IP() macroIan Moffett
Add TF_IP() to extract the instruction pointer from a trapframe between architectures. Signed-off-by: Ian Moffett <ian@osmora.org>
2025-05-06kernel/amd64: gdt: Fix indentIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-04-18kernel/aarch64: Add missing machdep headersIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-04-18Merge branch 'expt' into aarch64Ian Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-04-17kernel/amd64: isa: Add i8042 keyboard supportIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-04-17kernel/amd64: cpu: Add IRQ maskIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-04-17kernel/amd64: cdefs: Add more md_* macrosIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-04-17kernel: Enable interrupts upon sched entryIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-04-17kernel/amd64: isa: Add support for pcspkrIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-04-15kernel: Add per-arch cdefs.hIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-04-13Merge branch 'expt' into aarch64Ian Moffett
2025-04-12kernel/amd64: pio: Add _MACHINE_HAVE_PIO defineIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-04-12aarch64/pio: Add PIO stubsIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-04-02kernel/aarch64: Add initial AARCH64 portIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-04-02kernel: syscall: Add machdep syscall headerIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-02-21kernel: Update kernel log styleIan Moffett
Kernel logs must now all be lowercase for consistency. A new style called Peripheral Description Notation (PDN) has also been introduced to describe devices. Signed-off-by: Ian Moffett <ian@osmora.org>
2025-02-20kernel/amd64: isa: Add initial i8237 driver implIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2025-02-19kernel/amd64: bus: Add bus resource interfaceIan Moffett
This commit introduces a bus resource abstraction. A bus resource encapsulates bus specific information and semantics. Along with abstracting away bus specific details and providing an overall smoother interface, this additionally provides flexibility, access control and security by keeping track of permissions and allowing things to be turned on or off. Signed-off-by: Ian Moffett <ian@osmora.org>
2025-02-16project: Update copyright date to 2025Ian Moffett
Was supposed to happen on Jan 1, sorry! Happy late new year! Signed-off-by: Ian Moffett <ian@osmora.org>
2024-07-29kernel/amd64: msr: Add IA32_GS_BASE MSR defineIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-07-29kernel/amd64: Use only defines + handle err codesIan Moffett
- Use only defines in frame.h - Improve handling of trap error codes Signed-off-by: Ian Moffett <ian@osmora.org>
2024-07-29kernel/amd64: Facilitate IA32_FS_BASE reads/writesIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-07-16kernel/amd64: trap: Fix TRAPENTRY %CS offsetIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-07-11kernel/amd64: bus: Move MMIO_OFFSET to bus.hIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-07-10kernel/amd64: reboot: Halt all with REBOOT_HALTIan Moffett
This commit changes how reboot() handles REBOOT_HALT. Now instead of one core being halted, all cores will be halted through an IPI to a halt vector. Signed-off-by: Ian Moffett <ian@osmora.org>
2024-07-09kernel/amd64: bus: Add bus abstraction layerIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-07-06kernel/amd64: Add 8250 UART driverIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-07-02kernel/amd64: Handle the user GS segment registerIan Moffett
This commit introduces usage of swapgs to switch out the GS register with the user GS register. An md_td_kick() function is also introduced to start up user threads. The this_cpu() function uses the GS register to read the current CPU structure using a new "self" field. Signed-off-by: Ian Moffett <ian@osmora.org>
2024-07-02kernel/amd64: Add INTRENTRY() and TRAPENTRY()Ian Moffett
Add macros that perform certain operations before invoking the actual handler. This will be useful in the future for more complicated operations that need to be done before the handler is ran. Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-29kernel/amd64: lapic: Add support for IPIsIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-28kernel/amd64: Make splraise() return previous IPLIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-23kernel: sched: Add PCB and context switchingIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-23kernel/amd64: gdt: Add user CS/DS definesIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-20kernel/amd64: intr: Add splraise/splx supportIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-09kernel/amd64: pmap: Add initial pmap codeIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-08kernel/amd64: Prepare for schedulerIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-08kernel/amd64: Pass CPU info to cpu_startup()Ian Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-08kernel/amd64: lapic: Add End-Of-Interrupt helperIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-06kernel/amd64: tss: Add support for TSSIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-06kernel/amd64: lapic: Add support for LAPIC timerIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-06kernel/amd64: intr: Add intr_alloc_vector()Ian Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-06kernel/amd64: isa: Add i8254 driverIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-05kernel/amd64: Add initial LAPIC codeIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-04kernel/amd64: Add I/O APIC driverIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
2024-06-04kernel/amd64: Support IBRSIan Moffett
Signed-off-by: Ian Moffett <ian@osmora.org>
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