kernel/linux.git/arch/powerpc/include/asm/udbg.h, branch linux-7.0.y

powerpc/64: Remove maple platform

2024-10-29T12:01:52+00:00

The maple platform was added in 2004 [1], to support the "Maple" 970FX evaluation board. It was later used for IBM JS20/JS21 machines, as well as the Bimini machine, aka "Yellow Dog Powerstation". Sadly all those machines have passed into memory, and there's been no evidence for years that anyone is still using any of them. Remove the platform and related code. It can always be reinstated if there's interest. Note that this has no impact on support for 970FX based Power Macs. [1]: https://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux-fullhistory.git/commit/?id=f0d068d65c5e555ffcfbc189de32598f6f00770c Signed-off-by: Michael Ellerman Link: https://patch.msgid.link/20241013102957.548291-1-mpe@ellerman.id.au

powerpc: Remove core support for 40x

2024-06-28T12:28:47+00:00

Now that 40x platforms have gone, remove support for 40x in the core of powerpc arch. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://msgid.link/20240628121201.130802-4-mpe@ellerman.id.au

powerpc/udbg: Remove extern function prototypes

2022-09-28T09:22:14+00:00

'extern' keyword is pointless and deprecated for function prototypes. Signed-off-by: Pali Rohár Suggested-by: Gabriel Paubert Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220822231751.16973-1-pali@kernel.org

powerpc: Add support for early debugging via Serial 16550 console

2022-09-28T09:22:09+00:00

Currently powerpc early debugging contains lot of platform specific options, but does not support standard UART / serial 16550 console. Later legacy_serial.c code supports registering UART as early debug console from device tree but it is not early during booting, but rather later after machine description code finishes. So for real early debugging via UART is current code unsuitable. Add support for new early debugging option CONFIG_PPC_EARLY_DEBUG_16550 which enable Serial 16550 console on address defined by new option CONFIG_PPC_EARLY_DEBUG_16550_PHYSADDR and by stride by option CONFIG_PPC_EARLY_DEBUG_16550_STRIDE. With this change it is possible to debug powerpc machine descriptor code. For example this early debugging code can print on serial console also "No suitable machine description found" error which is done before legacy_serial.c code. Signed-off-by: Pali Rohár Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220822231501.16827-1-pali@kernel.org

powerpc: remove unused udbg_init_debug_beat() declaration

2022-09-15T12:55:46+00:00

udbg_init_debug_beat() has been removed since commit bf4981a00636 ("powerpc: Remove the celleb support"), so remove it. Signed-off-by: Gaosheng Cui Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220913075029.682327-5-cuigaosheng1@huawei.com

powerpc/powermac: Add __init attribute to eligible functions

2021-12-23T11:33:14+00:00

Some functions defined in 'arch/powerpc/platforms/powermac` are only called by other initialization functions and therefore should inherit the attribute. Also, change function declarations in header files to include `__init`. Signed-off-by: Nick Child Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20211216220035.605465-11-nick.child@ibm.com

powerpc/kernel: Add __init attribute to eligible functions

2021-12-23T11:33:10+00:00

Some functions defined in `arch/powerpc/kernel` (and one in `arch/powerpc/ kexec`) are deserving of an `__init` macro attribute. These functions are only called by other initialization functions and therefore should inherit the attribute. Also, change function declarations in header files to include `__init`. Signed-off-by: Nick Child Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20211216220035.605465-2-nick.child@ibm.com

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32+00:00

Based on 1 normalized pattern(s): this program 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 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

powerpc: Remove stale function prototypes

2014-09-25T13:14:43+00:00

There were a number of prototypes for functions that no longer exist. Remove them. Signed-off-by: Anton Blanchard Signed-off-by: Michael Ellerman

powerpc: Cleanup udbg_16550 and add support for LPC PIO-only UARTs

2013-08-14T04:58:15+00:00

The udbg_16550 code, which we use for our early consoles and debug backends was fairly messy. Especially for the debug consoles, it would re-implement the "high level" getc/putc/poll functions for each access method. It also had code to configure the UART but only for the straight MMIO method. This changes it to instead abstract at the register accessor level, and have the various functions and configuration routines use these. The result is simpler and slightly smaller code, and free support for non-MMIO mapped PIO UARTs, which such as the ones that can be present on a POWER 8 LPC bus. Signed-off-by: Benjamin Herrenschmidt