lwn.git/arch/parisc/include/asm/pdc.h, branch docs-mw

parisc: Replace ASSEMBLY with ASSEMBLER in non-uapi headers

2025-05-04T18:46:27+00:00

While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembly code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This can be very confusing when switching between userspace and kernelspace coding, or when dealing with uapi headers that rather should use __ASSEMBLER__ instead. So let's standardize on the __ASSEMBLER__ macro that is provided by the compilers now. This is mostly a completely mechanical patch (done with a simple "sed -i" statement), except for some manual tweaks in the files arch/parisc/include/asm/smp.h, arch/parisc/include/asm/signal.h, arch/parisc/include/asm/thread_info.h and arch/parisc/include/asm/vdso.h that had the macro spelled in a wrong way. Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: linux-parisc@vger.kernel.org Signed-off-by: Thomas Huth Signed-off-by: Helge Deller

parisc: firmware: Simplify calling non-PA20 functions

2023-09-07T07:12:20+00:00

Instead of usig #ifdefs, simply return PDC_BAD_PROC for functions which aren't available on 64-bit CPUs. Signed-off-by: Helge Deller

parisc: BTLB: Add BTLB insert and purge firmware function wrappers

2023-09-07T07:12:20+00:00

Signed-off-by: Helge Deller

sticon/parisc: Allow 64-bit STI calls in PDC firmware abstration

2023-06-30T15:14:14+00:00

Some 64-bit machines require us to call the STI ROM in 64-bit mode, e.g. with the VisFXe graphic card. This patch allows drivers to use such 64-bit calling conventions. Tested-by: John David Anglin Signed-off-by: Helge Deller

parisc: Replace regular spinlock with spin_trylock on panic path

2023-05-03T15:43:26+00:00

The panic notifiers' callbacks execute in an atomic context, with interrupts/preemption disabled, and all CPUs not running the panic function are off, so it's very dangerous to wait on a regular spinlock, there's a risk of deadlock. Refactor the panic notifier of parisc/power driver to make use of spin_trylock - for that, we've added a second version of the soft-power function. Also, some comments were reorganized and trailing white spaces, useless header inclusion and blank lines were removed. Cc: "James E.J. Bottomley" Cc: Jeroen Roovers Acked-by: Helge Deller # parisc Signed-off-by: Guilherme G. Piccoli Signed-off-by: Helge Deller

parisc: Show MPE/iX model string at bootup

2022-12-19T15:08:52+00:00

Some (mostly 64-bit machines) machines allow to run MPE/iX and report the MPE model string via firmware call. Enhance the pdc_model_sysmodel() function to report that model string. Note that some 32-bit machines like the B160L wrongly report success for the firmware call, so include a check to prevent showing wrong info. Signed-off-by: Helge Deller

parisc: Convert PDC console to an early console

2022-10-11T10:01:24+00:00

Rewrite the PDC console to become an early console. Beside the fact that now boot information is visible until another (text- or graphics) console takes over, this benefits as well machines with a yet-unsupported STI console and kgdb. Signed-off-by: Helge Deller

parisc: Add PDC locking functions for rendezvous code

2022-03-29T19:37:12+00:00

Add pdc_cpu_rendezvous_lock() and pdc_cpu_rendezvous_unlock() to lock PDC while CPU is transitioning into rendezvous state. This is needed, because the transition phase may take up to 8 seconds. Add pdc_pat_get_PDC_entrypoint() to get PDC entry point for current CPU. Signed-off-by: Helge Deller

parisc/firmware: add functions to retrieve TOC data

2021-11-01T06:35:59+00:00

Add functions to retrieve TOC data from firmware both for 1.1 and 2.0 PDC. Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller

parisc: add __pdc_cpu_rendezvous()

2019-09-08T13:19:58+00:00

When stopping SMP cpus send them into rendezvous, so we can start them again later (when kexec'ing a new kernel). Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller