diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-02 20:20:12 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-02 20:20:12 -0700 |
commit | f5a8eb632b562bd9c16c389f5db3a5260fba4157 (patch) | |
tree | 82687234d772ff8f72a31e598fe16553885c56c9 /arch/mn10300/kernel/gdb-low.S | |
parent | c9297d284126b80c9cfd72c690e0da531c99fc48 (diff) | |
parent | dd3b8c329aa270027fba61a02a12600972dc3983 (diff) |
Merge tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pul removal of obsolete architecture ports from Arnd Bergmann:
"This removes the entire architecture code for blackfin, cris, frv,
m32r, metag, mn10300, score, and tile, including the associated device
drivers.
I have been working with the (former) maintainers for each one to
ensure that my interpretation was right and the code is definitely
unused in mainline kernels. Many had fond memories of working on the
respective ports to start with and getting them included in upstream,
but also saw no point in keeping the port alive without any users.
In the end, it seems that while the eight architectures are extremely
different, they all suffered the same fate: There was one company in
charge of an SoC line, a CPU microarchitecture and a software
ecosystem, which was more costly than licensing newer off-the-shelf
CPU cores from a third party (typically ARM, MIPS, or RISC-V). It
seems that all the SoC product lines are still around, but have not
used the custom CPU architectures for several years at this point. In
contrast, CPU instruction sets that remain popular and have actively
maintained kernel ports tend to all be used across multiple licensees.
[ See the new nds32 port merged in the previous commit for the next
generation of "one company in charge of an SoC line, a CPU
microarchitecture and a software ecosystem" - Linus ]
The removal came out of a discussion that is now documented at
https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
marking any ports as deprecated but remove them all at once after I
made sure that they are all unused. Some architectures (notably tile,
mn10300, and blackfin) are still being shipped in products with old
kernels, but those products will never be updated to newer kernel
releases.
After this series, we still have a few architectures without mainline
gcc support:
- unicore32 and hexagon both have very outdated gcc releases, but the
maintainers promised to work on providing something newer. At least
in case of hexagon, this will only be llvm, not gcc.
- openrisc, risc-v and nds32 are still in the process of finishing
their support or getting it added to mainline gcc in the first
place. They all have patched gcc-7.3 ports that work to some
degree, but complete upstream support won't happen before gcc-8.1.
Csky posted their first kernel patch set last week, their situation
will be similar
[ Palmer Dabbelt points out that RISC-V support is in mainline gcc
since gcc-7, although gcc-7.3.0 is the recommended minimum - Linus ]"
This really says it all:
2498 files changed, 95 insertions(+), 467668 deletions(-)
* tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (74 commits)
MAINTAINERS: UNICORE32: Change email account
staging: iio: remove iio-trig-bfin-timer driver
tty: hvc: remove tile driver
tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers
serial: remove tile uart driver
serial: remove m32r_sio driver
serial: remove blackfin drivers
serial: remove cris/etrax uart drivers
usb: Remove Blackfin references in USB support
usb: isp1362: remove blackfin arch glue
usb: musb: remove blackfin port
usb: host: remove tilegx platform glue
pwm: remove pwm-bfin driver
i2c: remove bfin-twi driver
spi: remove blackfin related host drivers
watchdog: remove bfin_wdt driver
can: remove bfin_can driver
mmc: remove bfin_sdh driver
input: misc: remove blackfin rotary driver
input: keyboard: remove bf54x driver
...
Diffstat (limited to 'arch/mn10300/kernel/gdb-low.S')
-rw-r--r-- | arch/mn10300/kernel/gdb-low.S | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/arch/mn10300/kernel/gdb-low.S b/arch/mn10300/kernel/gdb-low.S deleted file mode 100644 index e2725552cd82..000000000000 --- a/arch/mn10300/kernel/gdb-low.S +++ /dev/null @@ -1,115 +0,0 @@ -############################################################################### -# -# MN10300 Low-level gdbstub routines -# -# Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. -# Written by David Howells (dhowells@redhat.com) -# -# This program is free software; you can redistribute it and/or -# modify it under the terms of the GNU General Public Licence -# as published by the Free Software Foundation; either version -# 2 of the Licence, or (at your option) any later version. -# -############################################################################### -#include <linux/sys.h> -#include <linux/linkage.h> -#include <asm/smp.h> -#include <asm/cache.h> -#include <asm/cpu-regs.h> -#include <asm/exceptions.h> -#include <asm/frame.inc> -#include <asm/serial-regs.h> - - .text - -############################################################################### -# -# GDB stub read memory with guard -# - D0 holds the memory address to read -# - D1 holds the address to store the byte into -# -############################################################################### - .globl gdbstub_read_byte_guard - .globl gdbstub_read_byte_cont -ENTRY(gdbstub_read_byte) - mov d0,a0 - mov d1,a1 - clr d0 -gdbstub_read_byte_guard: - movbu (a0),d1 -gdbstub_read_byte_cont: - movbu d1,(a1) - ret [],0 - - .globl gdbstub_read_word_guard - .globl gdbstub_read_word_cont -ENTRY(gdbstub_read_word) - mov d0,a0 - mov d1,a1 - clr d0 -gdbstub_read_word_guard: - movhu (a0),d1 -gdbstub_read_word_cont: - movhu d1,(a1) - ret [],0 - - .globl gdbstub_read_dword_guard - .globl gdbstub_read_dword_cont -ENTRY(gdbstub_read_dword) - mov d0,a0 - mov d1,a1 - clr d0 -gdbstub_read_dword_guard: - mov (a0),d1 -gdbstub_read_dword_cont: - mov d1,(a1) - ret [],0 - -############################################################################### -# -# GDB stub write memory with guard -# - D0 holds the byte to store -# - D1 holds the memory address to write -# -############################################################################### - .globl gdbstub_write_byte_guard - .globl gdbstub_write_byte_cont -ENTRY(gdbstub_write_byte) - mov d0,a0 - mov d1,a1 - clr d0 -gdbstub_write_byte_guard: - movbu a0,(a1) -gdbstub_write_byte_cont: - ret [],0 - - .globl gdbstub_write_word_guard - .globl gdbstub_write_word_cont -ENTRY(gdbstub_write_word) - mov d0,a0 - mov d1,a1 - clr d0 -gdbstub_write_word_guard: - movhu a0,(a1) -gdbstub_write_word_cont: - ret [],0 - - .globl gdbstub_write_dword_guard - .globl gdbstub_write_dword_cont -ENTRY(gdbstub_write_dword) - mov d0,a0 - mov d1,a1 - clr d0 -gdbstub_write_dword_guard: - mov a0,(a1) -gdbstub_write_dword_cont: - ret [],0 - -############################################################################### -# -# GDB stub BUG() trap -# -############################################################################### -ENTRY(__gdbstub_bug_trap) - .byte 0xF7,0xF7 # don't use 0xFF as the JTAG unit preempts that - ret [],0 |