linux-kernel - [PATCH v3 0/9] MIPS: Unify low-level debugging functionalities

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Message-Id: <20240502-mips_debug_ll-v3-0-3b61f30e484c@flygoat.com>
Date: Thu, 02 May 2024 10:59:27 +0100
From: Jiaxun Yang <jiaxun.yang@...goat.com>
To: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Jiaxun Yang <jiaxun.yang@...goat.com>, 
 Philippe Mathieu-Daudé <philmd@...aro.org>
Subject: [PATCH v3 0/9] MIPS: Unify low-level debugging functionalities

Hi all,

This is a attempt to bring all low-level debugging print functions
together and provide a arm-like low-level debugging interface and
a further capability to debug early exceptions.

This patch elimiate platform specific early_printk, zboot printing
functions and cps-vec-ns16550 by newly introduced debug_ll.

Hope you'll find them handy :-)

Happy hacking!

Thanks

Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
---
Changes in v3:
- Collect review tags
- Fix an indentation
- Link to v2: https://lore.kernel.org/r/20240326-mips_debug_ll-v2-0-b64abc76f2a1@flygoat.com

---
Jiaxun Yang (9):
      MIPS: asm: Move strings to .rodata.str section
      MIPS: debug: Implement low-level debugging functions
      MIPS: debug: Hook up DEBUG_LL with early printk
      MIPS: debug: Provide an early exception vector for low-level debugging
      MIPS: debug_ll: Add Kconfig symbols for some 8250 uarts
      MIPS: debug_ll: Implement support for Alchemy uarts
      MIPS: debug_ll: Implement support for AR933X uarts
      MIPS: zboot: Convert to use debug_ll facilities
      MIPS: CPS: Convert to use debug_ll facilities

 arch/mips/Kconfig                        |  12 +-
 arch/mips/Kconfig.debug                  | 240 +++++++++++++++++++++++--------
 arch/mips/boot/compressed/Makefile       |   9 +-
 arch/mips/boot/compressed/dbg.c          |  39 -----
 arch/mips/boot/compressed/debug-vec.S    |   3 +
 arch/mips/boot/compressed/debug.S        |   3 +
 arch/mips/boot/compressed/decompress.h   |   8 +-
 arch/mips/boot/compressed/head.S         |   6 +
 arch/mips/boot/compressed/uart-16550.c   |  49 -------
 arch/mips/boot/compressed/uart-alchemy.c |   9 --
 arch/mips/boot/compressed/uart-ath79.c   |   2 -
 arch/mips/boot/compressed/uart-prom.c    |   9 --
 arch/mips/include/asm/asm.h              |   2 +-
 arch/mips/include/debug/8250.S           |  60 ++++++++
 arch/mips/include/debug/alchemy.S        |  46 ++++++
 arch/mips/include/debug/ar933x.S         |  41 ++++++
 arch/mips/include/debug/uhi.S            |  48 +++++++
 arch/mips/kernel/Makefile                |   4 +-
 arch/mips/kernel/cps-vec.S               |  16 +--
 arch/mips/kernel/debug-vec.S             | 194 +++++++++++++++++++++++++
 arch/mips/kernel/debug.S                 | 130 +++++++++++++++++
 arch/mips/kernel/early_printk.c          |  19 +++
 arch/mips/kernel/head.S                  |   4 +
 23 files changed, 756 insertions(+), 197 deletions(-)
---
base-commit: 084c8e315db34b59d38d06e684b1a0dd07d30287
change-id: 20240326-mips_debug_ll-ce72fee1b6a2

Best regards,
-- 
Jiaxun Yang <jiaxun.yang@...goat.com>