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author | Arnd Bergmann <arnd@arndb.de> | 2018-03-07 22:23:24 +0100 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2018-03-16 10:55:47 +0100 |
commit | 4ba66a9760722ccbb691b8f7116cad2f791cca7b (patch) | |
tree | e29f9624ad0b13aa11860e39440bbc5e24d18a30 /arch/blackfin/kernel/shadow_console.c | |
parent | b8c9c8f0190f4004d3d4364edb2dea5978dfc824 (diff) | |
download | linux-stable-4ba66a9760722ccbb691b8f7116cad2f791cca7b.tar.gz linux-stable-4ba66a9760722ccbb691b8f7116cad2f791cca7b.tar.bz2 linux-stable-4ba66a9760722ccbb691b8f7116cad2f791cca7b.zip |
arch: remove blackfin port
The Analog Devices Blackfin port was added in 2007 and was rather
active for a while, but all work on it has come to a standstill
over time, as Analog have changed their product line-up.
Aaron Wu confirmed that the architecture port is no longer relevant,
and multiple people suggested removing blackfin independently because
of some of its oddities like a non-working SMP port, and the amount of
duplication between the chip variants, which cause extra work when
doing cross-architecture changes.
Link: https://docs.blackfin.uclinux.org/
Acked-by: Aaron Wu <Aaron.Wu@analog.com>
Acked-by: Bryan Wu <cooloney@gmail.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/blackfin/kernel/shadow_console.c')
-rw-r--r-- | arch/blackfin/kernel/shadow_console.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/arch/blackfin/kernel/shadow_console.c b/arch/blackfin/kernel/shadow_console.c deleted file mode 100644 index aeb8343eeb03..000000000000 --- a/arch/blackfin/kernel/shadow_console.c +++ /dev/null @@ -1,111 +0,0 @@ -/* - * manage a small early shadow of the log buffer which we can pass between the - * bootloader so early crash messages are communicated properly and easily - * - * Copyright 2009 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/string.h> -#include <asm/blackfin.h> -#include <asm/irq_handler.h> -#include <asm/early_printk.h> - -#define SHADOW_CONSOLE_START (CONFIG_PHY_RAM_BASE_ADDRESS + 0x500) -#define SHADOW_CONSOLE_END (CONFIG_PHY_RAM_BASE_ADDRESS + 0x1000) -#define SHADOW_CONSOLE_MAGIC_LOC (CONFIG_PHY_RAM_BASE_ADDRESS + 0x4F0) -#define SHADOW_CONSOLE_MAGIC (0xDEADBEEF) - -static __initdata char *shadow_console_buffer = (char *)SHADOW_CONSOLE_START; - -__init void early_shadow_write(struct console *con, const char *s, - unsigned int n) -{ - unsigned int i; - /* - * save 2 bytes for the double null at the end - * once we fail on a long line, make sure we don't write a short line afterwards - */ - if ((shadow_console_buffer + n) <= (char *)(SHADOW_CONSOLE_END - 2)) { - /* can't use memcpy - it may not be relocated yet */ - for (i = 0; i <= n; i++) - shadow_console_buffer[i] = s[i]; - shadow_console_buffer += n; - shadow_console_buffer[0] = 0; - shadow_console_buffer[1] = 0; - } else - shadow_console_buffer = (char *)SHADOW_CONSOLE_END; -} - -static __initdata struct console early_shadow_console = { - .name = "early_shadow", - .write = early_shadow_write, - .flags = CON_BOOT | CON_PRINTBUFFER, - .index = -1, - .device = 0, -}; - -__init int shadow_console_enabled(void) -{ - return early_shadow_console.flags & CON_ENABLED; -} - -__init void mark_shadow_error(void) -{ - int *loc = (int *)SHADOW_CONSOLE_MAGIC_LOC; - loc[0] = SHADOW_CONSOLE_MAGIC; - loc[1] = SHADOW_CONSOLE_START; -} - -__init void enable_shadow_console(void) -{ - if (!shadow_console_enabled()) { - register_console(&early_shadow_console); - /* for now, assume things are going to fail */ - mark_shadow_error(); - } -} - -static __init int disable_shadow_console(void) -{ - /* - * by the time pure_initcall runs, the standard console is enabled, - * and the early_console is off, so unset the magic numbers - * unregistering the console is taken care of in common code (See - * ./kernel/printk:disable_boot_consoles() ) - */ - int *loc = (int *)SHADOW_CONSOLE_MAGIC_LOC; - - loc[0] = 0; - - return 0; -} -pure_initcall(disable_shadow_console); - -/* - * since we can't use printk, dump numbers (as hex), n = # bits - */ -__init void early_shadow_reg(unsigned long reg, unsigned int n) -{ - /* - * can't use any "normal" kernel features, since thay - * may not be relocated to their execute address yet - */ - int i; - char ascii[11] = " 0x"; - - n = n / 4; - reg = reg << ((8 - n) * 4); - n += 3; - - for (i = 3; i <= n ; i++) { - ascii[i] = hex_asc_lo(reg >> 28); - reg <<= 4; - } - early_shadow_write(NULL, ascii, n); - -} |